Chap1 An Overview On International Investment
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CHAPTER 1—THE INTERNATIONAL ECONOMY AND GLOBALIZATION SHORT ANSWER1. What is the most important factor which contributes to competitiveness?ANS:Key to the concept of competitiveness is productivity, or output per worker hour.PTS: 12. What are the challenges of the international trading system?ANS:Among the challenges that the international trading system faces are dealing with fair laborstandards and concerns about the environment.PTS: 1ESSAY1. Does exposure to competition with the world leader in a particular industry improve a firm'sproductivity?ANS:The McKinsey institute found that higher productivity rested on the ability of mangers to invent new and ever more efficient ways of making products and on the ability of engineers to design products that are easy to make. The institute researchers observed that in the auto industry in Japan or the food industry in the United States, managers and engineers do not achieveinnovations because they are smarter work harder or are better educated than their peers. They do so because they are subjected to intense global competition, where improving laborproductivity is the key to success.PTS: 12. What are the essential arguments in favor of free trade?ANS:Proponents of an open trading system contend that international trade results in higher levels of consumption and investment, lower prices of commodities, and a wider range of productchoices for consumers. Trade also enables workers to become more productive, and wages of workers whose skills are more scarce internationally tend to rise.PTS: 1CHAPTER 2—FOUNDATIONS OF MODERN TRADE THEORY: COMPARATIVE ADVANTAGESHORT ANSWER1. Is it possible to add up the preferences of all consumers in an entire nation?ANS:No. It is impossible to make interpersonal comparisons of satisfaction, and thus it is notpossible to add up preferences.PTS: 12. Who gains more from trade, when nations are of unequal economic size?ANS:If one nation is significantly larger than the other, the larger nation attains fewer gains from trade, while the smaller nation captures most of the gains from trade.PTS: 13. Is it possible for comparative advantage to change, thus changing the direction of trade?ANS:Lagging productivity growth may cause a country to lose its comparative advantage. In a two-product, two-country model, this would change the direction of trade.PTS: 14. Do national security concerns lead to incomplete specialization?ANS:Yes. National security concerns may lead a country to produce some of the commodity in which it has comparative disadvantage, thus leading to incomplete specialization.PTS: 1ESSAY1. Will it be impossible to keep low-skilled jobs in the U.S.?ANS:If tax credits or other incentives are made available to U.S. companies, it would be possible for those companies to invest in training or technology for low-skilled workers. That wouldimprove the efficiency of the workers. Such improvements in productivity can more than outweigh the wage advantage that is enjoyed by low-skilled workers overseas. New Balance Athletic Shoe Co. Inc., headquartered in Boston, Massachusetts, has been successful inretaining low-skilled production in the United States by increasing worker productivity.PTS: 12. Is it possible to estimate the gains from trade?ANS:When a nation trades, it enjoys a larger income, owing to a wider range of goods available to consumers. Trade also has a positive influence on productivity levels. However, it is extremely difficult to measure these gains, since it requires knowledge of what a nation's imports would cost if it produced them itself, instead of purchasing them from a less expensive source abroad.PTS: 1CHAPTER 3—SOURCES OF COMPARATIVE ADVANTAGESHORT ANSWER1. Does factor price equalization occur in the real world?ANS:In the real world, differences in factor prices tend to exist. Different technologies, imperfect markets, transportation costs, and trade barriers may prevent factor prices from equalizingamong nations.PTS: 12. What is the focus of the product life cycle theory, and where is it applicable?ANS:The product life cycle theory focuses on the role of technological innovation as a keydeterminant of trade patterns. It applies to manufactured goods.PTS: 1ESSAY1. Explain how immigration and trade may worsen wage inequality, and how college educationmay mitigate against that.ANS:Trade tends to increase the demand for skilled workers relative to unskilled workers, thusworsening wage inequality. Immigration of unskilled workers decreases the supply of skilled workers relative to unskilled workers, thus worsening wage inequality. Alternatively, college education increases the supply of skilled workers relative to unskilled workers, thus reducing wage inequality.PTS: 12. How does Staffan Linder explain world trade patterns?ANS:Linder offers two explanations of world trade patterns. Trade in primary products conforms well to the factor-endowment theory. However, trade in manufactured goods is best explained by overlapping demand structures among nations. For manufactured goods, the basis for trade is stronger when the structure of demand in two nations is more similar, due to similarper-capita incomes.PTS: 1CHAPTER 4—TARIFFSSHORT ANSWER1. Can import duties have unintended side effects?ANS:Yes. Duties may discourage a company from importing goods in amounts large enough to take advantage of quantity discount pricing. Also, up-front payment of these duties may imposefinancial hardships on importers.PTS: 12. What happens to effective protection when the value added by the domestic producer declines?ANS:The degree of effective protection increases.PTS: 1ESSAY1. Is it possible for a low nominal tariff rate to understate the effective rate of protection? What istariff escalation?ANS:Yes. In some countries, the effective rate of protection is more than twice the nominal rate. The effective rate of protection takes into account the effects of tariffs levied on raw materials and intermediate goods. Tariff structures of industrialized nations have generally beencharacterized by rates that give greater protection to intermediate and finished products than to primary commodities. This is referred to as tariff escalation.PTS: 12. How can tariffs be justified?ANS:Tariffs are justified on the grounds that they protect domestic employment and wages, helpcreate a level playing filed for international trade, equate the cost of imported products with the cost of domestically produced goods, and allow domestic industries to be insulated temporarily from foreign competition until they can grow and develop or protect industries necessary for national security.PTS: 1CHAPTER 5—NONTARIFF TRADE BARRIERSSHORT ANSWER1. Is a tariff-rate quota a two-tier tariff? Why?ANS:Yes. It allows a specified number of goods to be imported at one tariff rate, whereas anyimports above this level face a higher tariff rate.PTS: 12. What is an OMA?ANS:An OMA involves limitations on export sales administered by one or more exporting nations.PTS: 1ESSAY1. Describe some of the differences between tariffs and quotas?ANS:Tariffs and quotas differ in their revenue effects and restrictive impacts on the volume of trade.While quotas are easier to administer and manage, they do not provide the government with revenue.PTS: 12. What are the intent and impact of domestic content requirements?ANS:Domestic content requirements try to limit the practice of job outsourcing and also encourage the development of domestic industry. They stipulate the minimum percentage of a product's value that must be produced in the home country for that product to be sold there. Domestic content protection tends to impose welfare losses on the domestic economy in the form ofhigher production costs and higher-priced goods.PTS: 1CHAPTER 6—TRADE REGULATIONS AND INDUSTRIAL POLICIES SHORT ANSWER1. What is the essential idea behind strategic trade policy?ANS:The essential notion underlying strategic trade policy is imperfect competition.PTS: 12.What is the basis for trade adjustment assistance?ANS:The rationale of trade adjustment assistance is that if society in general enjoys welfare gains from the increased efficiency stemming from trade liberalization, some sort of compensation should be provided for those who are temporarily injured by import competition.PTS: 1ESSAY1. Has industrial policy contributed significantly to Japan's economic growth?ANS:The extent to which industrial policy has contributed to Japan's economic growth is unclear.Japan has benefited from a high domestic savings rate, an educated and highly motivated labor force, good labor management relations, a shift of labor from low-productivity sectors tohigh-productivity manufacturing, entrepreneurs willing to assume risks, and the like. Thesefactors have enhanced Japan's transformation from a low-technology nation to ahigh-technology nation. It is debatable how rapidly this transformation would have occurred in the absence of an industrial policy. Although Japan has the most visible industrial policy of the industrial nations, the importance of that policy to Japan should not be exaggerated.PTS: 12. Explain how advocates of strategic trade policy differ from the classical free traders in theirtreatment of externalities?ANS:Advocates of strategic trade policy recognize that the classical argument for free trade considered externalities at length. The difference, they maintain, is that the classical theory was based on perfect competition and thus could not appreciate the most likely source of the externality, whereas modern theories based on imperfect competition can. The externality in question is the ability of companies to capture the fruits of expensive innovation. Classical theory based on perfect competition neglected this factor because large fixed costs are involved in innovation and research and development, and such costs ensure that the number of competitors in an industry will be small.PTS: 1CHAPTER 7—TRADE POLICIES FOR THE DEVELOPING NATIONS SHORT ANSWER1. What are some major trade problems faced by developing nations?ANS:Trade problems include lack of diversification of economies, unstable export markets,declining terms of trade over time, and lack of access to markets of advanced countries.PTS: 12. Are economic downturns helpful to cartels?ANS:No they are generally problematic for cartels. As market sales dwindle in a weakeningeconomy, profits fall. Cartel members may conclude that they can escape serious decreases in profits by reducing prices, in expectation of gaining sales at the expense of other cartelmembers.PTS: 1ESSAY1. What are some of the growth strategies that have been employed by the developing nations?How successful are these strategies?ANS:Besides attempting to stabilize commodity prices, developing nations have promoted internal industrialization through policies of import substitution and export promotion. Countriesemphasizing export promotion have tended to realize higher rates of economic growth thancountries emphasizing import-substitution policies.PTS: 12. Describe the flying-geese pattern of economic growth? What countries have pursued thisstrategy?ANS:It is widely recognized that East Asian economies have followed the flying-geese pattern of growth. This pattern of growth occurs when countries gradually move up in technologicaldevelopment by following in the pattern of countries ahead of them in the development process.For example, Malaysia and Taiwan take over leadership in apparel and textiles from Japan as Japan moves into higher-technology sectors of automotive and electronic products.PTS: 1CHAPTER 8—REGIONAL TRADING AGREEMENTSSHORT ANSWER1. What is meant by economic integration?ANS:The term refers to the process of eliminating restrictions on international trade, payments, and factor input mobility.PTS: 12. What factors influence the extent of trade creation and trade diversion?ANS:Trade creation and diversion are influenced by the degree of competitiveness thatmember-nation economies have prior to formation of the customs union, the number and size of its members, and the size of its external tariff against non-members.PTS: 1ESSAY1. Explain the theory of optimum currency areas.ANS:Much of the analysis of the benefits and costs of Europe's common currency is based on the theory of an optimum currency area. According to this theory, the gains to be had from sharinga currency across countries' boundaries include more uniform prices; lower transaction costs,greater certainty for investors, and enhanced competition. These gains must be comparedagainst the loss of an independent monetary policy and the option of changing the exchange rate.PTS: 12. Concerning transition economies, what do the advocates of shock therapy propose?ANS:Advocates of shock therapy maintain that economies in transition should proceed immediately on all fronts. That is, they should privatize, abandon price controls, liberalize trade, and develop market institutions, and so on as quickly as possible. Although the initial economic pain may be severe, it will subside as the transition to the market economy leads to rising living standards.PTS: 1CHAPTER 9—INTERNATIONAL FACTOR MOVEMENTS AND MULTINATIONAL ENTERPRISESSHORT ANSWER1. What are the typical ways in which multinational enterprises have diversified their operations?ANS:Multinational enterprises have diversified their operations along vertical, horizontal, andconglomerate lines.PTS: 12. What are Mexican maquiladoras?ANS:Maquiladoras are assemblages of foreign-owned companies that use foreign parts and Mexican assembly to produce goods that are exported to the United States.PTS: 1ESSAY1.Are there any differences between the theory of multinational enterprises and conventionaltrade theory?ANS:There are major differences. The conventional model assumes that commodities are tradedbetween independent, competitive businesses. However, multinational enterprises are oftenvertically integrated businesses with substantial intrafirm sales. Also, multinational enterprises may use transfer pricing to maximize overall company profits of any single subsidiary.PTS: 12. What are the disadvantages of forming joint ventures?ANS:A joint venture is a cumbersome organization compared with a single organization. Control isdivided, creating problems of "two masters." Success or failure depends on how wellcompanies work together despite having different objectives, corporate cultures and ways of doing things. The action of corporate chemistry is hard to predict, but it is critical becausejoint-venture agreements usually provide both partners an ongoing role in management. When joint-venture ownership is divided equally, as often occurs, deadlocks in decision making can take place. Even when negotiated balance is achieved, it can be upset by changing corporate goals or personnel.PTS: 1。
国际事件概括英语作文Title: A Comprehensive Overview of Recent International Events。
In recent times, the world has witnessed a myriad of significant international events spanning across various domains including politics, economics, environment, and social issues. These events have not only shaped global dynamics but also influenced the trajectory of individual nations. This essay aims to provide a comprehensive overview of some of the noteworthy international eventsthat have occurred recently.Firstly, in the realm of geopolitics, the ongoing conflict between Ukraine and Russia continues to capture global attention. Tensions have escalated due toterritorial disputes, military interventions, and allegations of human rights violations. The international community remains deeply concerned about the humanitarian crisis unfolding in the region and endeavors to facilitatepeaceful negotiations to resolve the conflict.Secondly, the COVID-19 pandemic continues to exert a profound impact on the global landscape. Despite widespread vaccination efforts, new variants of the virus have emerged, posing challenges to public health systems worldwide. The pandemic has also exacerbated existing inequalities, highlighting the need for international cooperation in addressing health crises and ensuring equitable access to vaccines and healthcare resources.Moreover, climate change remains a pressing issue of global concern. The recent United Nations Climate Change Conference (COP26) underscored the urgency of collective action to mitigate greenhouse gas emissions and limitglobal warming. However, achieving consensus on ambitious climate targets remains a formidable challenge, ascountries grapple with competing economic interests and environmental priorities.On the economic front, the world faces uncertainties stemming from trade tensions, supply chain disruptions, andinflationary pressures. The resurgence of protectionist policies in some regions has strained international trade relations, hindering efforts to foster economic recovery and sustainable development. Additionally, the transition to a digital economy has accelerated, presenting both opportunities and challenges for global markets and industries.In the realm of technology, advancements in artificial intelligence, cybersecurity, and space exploration have opened new frontiers for innovation and collaboration. However, concerns persist regarding data privacy, digital security, and the ethical implications of emerging technologies. As countries race to harness the benefits of technological progress, there is a growing need for international norms and regulations to ensure responsible and ethical use of technology.Furthermore, social issues such as human rights violations, refugee crises, and racial inequality continue to demand global attention and action. From the plight of refugees fleeing conflict-ridden regions to the ongoingstruggle for racial justice and equality, these issues underscore the interconnectedness of human rights andsocial justice on a global scale.In conclusion, the international events outlined above reflect the complex and interconnected nature of the modern world. From geopolitical conflicts to global pandemics, economic uncertainties to technological advancements, the challenges facing humanity are multifaceted and interdependent. Addressing these challenges requires concerted efforts and cooperation on a global scale, as nations strive to build a more resilient, equitable, and sustainable future for all.。
Chapter 1 GlobalizationTrue / False Questions1.The shift toward a more integrated and interdependent world economy is referred to asglobalization.True False2。
A company does not need a large size to facilitate, and benefit from, the globalization of markets.True False3。
Companies hope to lower their overall cost structure or improve the quality or functionality of their product offering through globalization of production。
True False4.The most global markets currently are markets for consumer products。
True False5。
Outsourcing is a process that is limited to manufacturing enterprises.True False6。
The health care sector in the U.S. cannot avail the benefits of outsourcing to low—cost producers in other nations because of the nature of the work.True False7.The World Bank has focused on policing the world trading system and making surenation-states adhere to the rules laid down in trade treaties。
Chapter01Chapter01Introduction Answer KeyMultiple Choice Questions1.Public financeA.is not like public economics.B.develops principles for understanding the economic role of government.C.only works for local and state governments.D.all of these answer options are correct.AACSB:Reflective ThinkingAccessibility:Keyboard NavigationBlooms:RememberDifficulty:1EasyTopic:Introduction2.A regulatory budget wouldA.provide an accounting of government regulation.B.be difficult to compute.C.have to be attempted unofficially.D.all of these answer options are correct.AACSB:Reflective ThinkingAccessibility:Keyboard NavigationBlooms:RememberDifficulty:1EasyTopic:Government at a Glance3.The federal governmentA.is the largest taxing entity in the country.B.is only concerned with international issues.C.spends heavily on net interest.D.all of these answer options are correct.AACSB:Reflective ThinkingAccessibility:Keyboard NavigationBlooms:RememberDifficulty:1EasyTopic:Government at a Glance4.State and local governments receive the largest amount of revenue fromA.personal income taxes.B.property taxes.C.sales taxes.D.payroll taxes.AACSB:Reflective ThinkingAccessibility:Keyboard NavigationBlooms:RememberDifficulty:1EasyTopic:Government at a Glance5.The federal government gets most of its revenue fromA.personal income taxes.B.property taxes.C.sales taxes.D.payroll taxes.AACSB:Reflective ThinkingAccessibility:Keyboard NavigationBlooms:RememberDifficulty:1EasyTopic:Government at a Glance6.In a pure market economy,A.there is no role for government.ernment intervention might be needed.rge markets where people meet to buy and sell are required.D.all of these answer options are correct.AACSB:Reflective ThinkingAccessibility:Keyboard NavigationBlooms:RememberDifficulty:1EasyTopic:Public Finance and Ideology7.A government good or service includesA.bridges.B.parks.C.national defense.D.all of these answer options are correct.AACSB:Reflective ThinkingAccessibility:Keyboard NavigationBlooms:UnderstandDifficulty:1EasyTopic:Public Finance and Ideologyernment output is hard to account for because governmentA.is so large.B.provides goods that have no resale value.C.keeps secrets about what it produces.D.goods are generally not sold or produced in easily measurable units.AACSB:Reflective ThinkingAccessibility:Keyboard NavigationBlooms:UnderstandDifficulty:2MediumTopic:Government at a Glance9.Economists who study the role of government in the marketA.agree mostly on the role that the government should play.B.study for market problems that the government might help solve.C.find that supply and demand graphs never work for the government.D.none of these answer options are correct.AACSB:Reflective ThinkingAccessibility:Keyboard NavigationBlooms:UnderstandDifficulty:2MediumTopic:Public Finance and Ideology10.EconomicsA.started as a business application.B.can never be defined.C.is the study of unlimited wants but limited resources.D.has no"real world"relevance.AACSB:Reflective ThinkingAccessibility:Keyboard NavigationBlooms:RememberDifficulty:1EasyTopic:Public Finance and Ideology11.TaxesA.are mandatory payments.B.are necessary for financing government expenditures.C.do not directly relate to the benefit of government goods and services received.D.all of these answer options are correct.AACSB:Reflective ThinkingAccessibility:Keyboard NavigationBlooms:RememberDifficulty:1EasyTopic:Public Finance and Ideologycation isA.generally financed at the state and local level.B.too expensive for the federal government.C.generally financed at the federal level.D.financed on a voluntary basis.AACSB:Reflective ThinkingAccessibility:Keyboard NavigationBlooms:RememberDifficulty:1EasyTopic:Government at a Glance13.PoliticsA.play no role in public finance.B.influence government decisions.C.have to be factored into economic decision making.D.all of these answer options are correct.AACSB:Reflective ThinkingAccessibility:Keyboard NavigationBlooms:RememberDifficulty:1EasyTopic:Government at a Glance14.IndividualsA.are too small to matter in macroeconomic decision making.B.need to participate in a democracy.C.make up the government.D.are too small to matter in macroeconomic decision making and need to participate in a democracy.E.need to participate in a democracy and make up the government.AACSB:Reflective ThinkingAccessibility:Keyboard NavigationBlooms:UnderstandDifficulty:2MediumTopic:Public Finance and Ideology15.The unified budget isA.a budget that includes all nations.B.a document which itemizes all the federal government's expenditures and revenues.C.a document that accounts for all spending by states.D.none of these answer options are correct.AACSB:Reflective ThinkingAccessibility:Keyboard NavigationBlooms:RememberDifficulty:1EasyTopic:Government at a Glance16.In2012the federal budget was almostA.1million pages long.B.17pages long.C.1,300pages long.D.500pages long.AACSB:Reflective ThinkingAccessibility:Keyboard NavigationBlooms:RememberDifficulty:1EasyTopic:Government at a Glance 17.Social insurance has become an increasingly large portion of federal taxes because of the"BabyBoomer"generation.A.TrueB.FalseC.UncertainAACSB:Reflective ThinkingAccessibility:Keyboard NavigationBlooms:RememberDifficulty:1EasyTopic:Government at a Glance18.A very small portion of government expenditures is financed by taxes.A.TrueB.FalseC.UncertainAACSB:Reflective ThinkingAccessibility:Keyboard NavigationBlooms:RememberDifficulty:1EasyTopic:Government at a Glance19.In2011national defense was just as large a general expenditure as Social Security.A.TrueB.FalseC.UncertainAACSB:Reflective ThinkingAccessibility:Keyboard NavigationBlooms:RememberDifficulty:1EasyTopic:Government at a Glance20.The Constitution of the United States says nothing about state economic activity.A.TrueB.FalseC.UncertainAACSB:Reflective ThinkingAccessibility:Keyboard NavigationBlooms:RememberDifficulty:1EasyTopic:Government at a Glance21.The taxes paid by citizens are directly related to the benefit of government goods and services received.A.TrueB.FalseC.UncertainAACSB:Reflective ThinkingAccessibility:Keyboard NavigationBlooms:RememberDifficulty:1EasyTopic:Government at a Glance 22.Interest on the national debt,as a percentage of federal expenditures,has increased significantly since1965.A.TrueB.FalseC.UncertainAACSB:Reflective ThinkingAccessibility:Keyboard NavigationBlooms:RememberDifficulty:1EasyTopic:Government at a Glance23.Local governments rely heavily on property taxes.A.TrueB.FalseC.UncertainAACSB:Reflective ThinkingAccessibility:Keyboard NavigationBlooms:RememberDifficulty:1EasyTopic:Government at a Glanceernment is designed to handle problems not addressed by the private sector.A.TrueB.FalseC.UncertainAACSB:Reflective ThinkingAccessibility:Keyboard NavigationBlooms:RememberDifficulty:1EasyTopic:Government at a Glance 25.Expenditures,as a percentage of GDP for the United States,are not very different than those of otherindustrialized nations.A.TrueB.FalseC.UncertainAACSB:Reflective ThinkingAccessibility:Keyboard NavigationBlooms:RememberDifficulty:1EasyTopic:Government at a Glance26.Payroll taxes are a major financing tool at the federal level.A.TrueB.FalseC.UncertainAACSB:Reflective ThinkingAccessibility:Keyboard NavigationBlooms:RememberDifficulty:1EasyTopic:Government at a Glance27.In2011the federal government spent345.8billion dollars on income security.A.TrueB.FalseC.UncertainAACSB:Reflective ThinkingAccessibility:Keyboard NavigationBlooms:RememberDifficulty:1EasyTopic:Government at a Glance28.Personal income and Social Security payroll taxes are currently the largest sources of governmentrevenue.A.TrueB.FalseC.UncertainAACSB:Reflective ThinkingAccessibility:Keyboard NavigationBlooms:RememberDifficulty:1EasyTopic:Government at a Glance Essay Questions29.Write an essay discussing some of the reasons that federal expenditures for Social Security haveincreased since1965.Federal expenditures for Social Security have increased since1965for several reasons,includingincreases in the number of persons entitled to benefits and the introduction of Medicare and otherprograms.AACSB:Reflective ThinkingBlooms:UnderstandDifficulty:2MediumTopic:Government at a Glance 30.Do you think it is correct policy that the federal government is not required to finance all of itsexpenditures with tax revenues and is allowed to borrow?What are the implications of this policy?Answers will vary,but financing out of current spending ensures that there are no deficits at the end of the fiscal year.However,in times of crisis,such as war,this type of financing would limit thegovernment's ability to accomplish its stated goals.AACSB:AnalyticBlooms:EvaluateDifficulty:3HardTopic:Government at a Glance31.Why do/should we care that federal expenditures are becoming an increasingly larger portion of GDP?We should care that federal expenditures are becoming an increasingly larger portion of GDP because of public sector crowding out.AACSB:AnalyticBlooms:AnalyzeDifficulty:3HardTopic:Government at a Glance 32.Discuss your views on government intervention regarding tobacco consumption.As with many social issues,tobacco consumption will not only impact the health of the population but the ability of people to work and be productive members of society.Some will argue that this is aprivate issue and the government has no role in regulating people treat their own bodies but others will counter that the impacts are not just to the consumer but to third parties also.AACSB:AnalyticBlooms:AnalyzeDifficulty:3HardTopic:Government at a Glance。
英语一大作文第二段In the realm of global communication, English has emerged asa lingua franca, bridging gaps between diverse cultures and facilitating international trade. The second paragraph of an English essay on this topic would delve into the significance of English in various fields, highlighting its pervasive influence.The educational landscape has been vastly transformed by the prevalence of English. It is now a core subject in schools worldwide, with students from a young age being introduced to its grammar, vocabulary, and idiomatic expressions. Thisearly exposure is crucial as it lays the foundation for students to engage with the global community. Moreover,English is the primary language of instruction in numerous prestigious universities, making proficiency in the languagea gateway to higher education and research opportunities.Furthermore, the business world heavily relies on English as the medium for international transactions and negotiations. Corporations from different countries often communicate in English to ensure clarity and efficiency in their dealings. This has led to a surge in demand for English language skills, with many professionals seeking to enhance their command ofthe language to remain competitive in the global market.In the realm of technology and media, English is the de facto language for software interfaces, social media platforms, anddigital content. This ubiquity has made English an essential tool for anyone wishing to navigate the digital age effectively. From coding to content creation, a strong grasp of English opens up a plethora of opportunities and allowsfor seamless interaction with a global audience.In summary, the second paragraph of an essay on the importance of English would underscore its role as a unifying force in education, business, and technology, emphasizing how it empowers individuals to participate in an interconnected world.。
国际组织英文总结汇报稿Title: A Summary Report on International Organizations Introduction:In today's globalized world, international organizations play a crucial role in promoting cooperation, resolving conflicts, and driving global development. This report aims to provide a comprehensive overview of major international organizations, including their objectives, functions, achievements, and challenges.1. United Nations (UN):The United Nations is the largest and most prominent international organization, established in 1945. Its primary objective is to maintain international peace and security, promote human rights, foster social and economic development, and provide humanitarian assistance. The UN has made notable achievements in peacekeeping, advancing women's rights, eradicating diseases, protecting the environment, and mitigating conflicts. However, challenges persist, including funding shortages, geopolitical disagreements, and the need for more inclusive decision-making processes.2. International Monetary Fund (IMF):The IMF is responsible for ensuring global financial stability and promoting economic growth. It provides financial assistance, monitors global economic trends, offers policy advice, and helps countries manage their economic crises. The IMF's accomplishments include stabilizing economies during financial crises, fostering economic reforms, and reducing poverty. However, criticisms against the IMF revolve around its conditionality policy,lack of representation for developing countries, and potential negative impacts on national sovereignty.3. World Bank:The World Bank aims to alleviate poverty and promote sustainable development by providing financial assistance, technical expertise, and policy advice to member countries. It focuses on areas such as infrastructure development, education, healthcare, and governance reforms. The World Bank's key achievements include funding numerous development projects, supporting education initiatives, and promoting sustainable practices. Nonetheless, challenges persist in balancing economic growth with environmental protection, ensuring corruption-free projects, and addressing the needs of marginalized populations.4. World Trade Organization (WTO):The WTO facilitates global trade by negotiating and enforcing international trade agreements, resolving trade disputes, and providing a forum for member countries to discuss trade-related issues. It has played a crucial role in reducing trade barriers, promoting economic integration, and resolving disputes through its dispute settlement system. However, the WTO faces challenges in adapting to new trade dynamics, narrowing the gaps between developed and developing countries, and addressing concerns related to fair trade, labor rights, and environmental protection. 5. European Union (EU):The EU is a political and economic union consisting of 27 member countries in Europe. Its main objectives include promoting peace, fostering economic integration, ensuring human rights, andenhancing cooperation in various areas. The EU's achievements include establishing the single market, implementing harmonized regulations, and facilitating free movement of people, goods, services, and capital. However, challenges remain, such as managing diversity, addressing socio-economic disparities, and addressing migration issues.Conclusion:International organizations play a crucial role in addressing global challenges, promoting cooperation, and advancing global development. The United Nations, International Monetary Fund, World Bank, World Trade Organization, and European Union are among the most prominent international organizations that have made significant contributions in their respective areas. However, these organizations face various challenges ranging from financial constraints, geopolitical tensions, lack of representation, to environmental concerns. Addressing these challenges will require collective efforts from member countries to ensure these organizations can effectively continue their missions in the rapidly changing global landscape.。
关于询盘的英语作文【中英文版】Composition on InquiryIn the realm of international trade, an inquiry serves as a pivotal initial step, where potential buyers express their interest in a product or service.It is a critical communication tool that can lead to fruitful negotiations and eventually, a successful transaction.在国际贸易领域,询盘是至关重要的第一步,潜在买家通过这一方式表达他们对产品或服务的兴趣。
它是能够引向富有成果的谈判,并最终促成成功交易的的关键沟通工具。
When crafting an inquiry, it is imperative to be concise yet thorough.Buyers should clearly state what they are looking for, including specifications, quantities, and any other pertinent details.Being specific enhances the likelihood of receiving a tailored response from the seller.在撰写询盘时,既要简洁又要全面。
买家应当清楚地表明他们在寻找什么,包括规格、数量以及其他相关细节。
具体明确能提高收到卖家针对性回复的可能性。
Moreover, maintaining a professional tone is ing polite language and proper business etiquette can leave a positive impression on the seller, which may facilitate a prompt and satisfactory response.此外,保持专业的语气至关重要。
Chapter 1 An Overview On International Investment Section 1: The conception and the types of International Investment The conceptionSimply stated, investment is a vehicle into which funds can be placed with the expectation that they will be preserved or will increase in value or will generate positive returns. The term investment can cover a wide range of activities. Idle cash is not an investment, since its value is likely to be eroded by inflation and it fails to provide any type of return. The same cash placed in a bank savings account would be considered as an investment, since the account provides a positive return. The various types of investments can be differentiated on the basis of a few factors, such as option; short or long term; domestic or international.International Investment refers to any economic behaviors through which investors such as TNCs, transnational financial institutions, official and semi-official institutions and individuals invest their assets in countries other than their own with the expectation of positive return. Although international investments cover almost the same varieties of domestic investments, they are extensively regarded more complicated and difficult than domestic ones due to its internationalization.International investment can be divided into many types according to different standards. For example, we have long-run investments and short-run investments according to the period an investment paybackcovers. Official investments and private investments based on investors themselves; according to whether investors own control right in the management of a firm or not, it usually falls into two types; foreign direct investment (FDI)and international indirect investment ( also Foreign Portfolio Equity Investment, abbreviated as FPEI),FDI and FPEI are the most cited types in both the practice and theoretical study of international investment.FDI and FPEIAccording to the IMF and OECD definitions, FDI reflects the aim of obtaining a lasting interest by a resident entity of one economy (direct investor) in an enterprise that is resident in another economy (the direct investment enterprise).The “lasting interest” implies the existence of a long-term relationship between the direct investor and the direct investment enterprise and a significant degree of influence on the management of the latter.FDI involves both the initial transaction establishing the relationship between the investor and the enterprise and all subsequent capital transactions between them and among affiliated enterprises, both incorporated and unincorporated. It should be noted that capital transactions which do not give rise to any settlement, e.g. an interchange of shares among affiliated companies, must also be recorded in theBalance of Payments and in the IIP(International Investment Position).The fifth Edition of the IMF’s Balance of Payment Manual defines the owner of 10% or more of a company’s capital as a direct investor. This guideline is not a fast rule, as it acknowledges that smaller percentage may entail a controlling interest in the company (and, conversely, that a share of more than 10% may not signify control).But the IMF recommends using this percentage as the basic dividing line between direct investment and portfolio investment in the form of shareholdings. Thus, when a non-resident who previously had no equity in a resident enterprise purchases 10% or more of the shares of that enterprise from a resident, the price of equity holdings acquired should be recorded as direct investment. From this moment, any further capital transactions between these two companies should be recorded as a direct investment. When a non-resident holds less than 10% of the shares of an enterprise as portfolio investment, and subsequently acquires additional shares resulting in a direct investment (10% of more), only the purchase of additional shares is recorded as direct investment in the Balance of Payments. The holdings that were acquired previously should not be reclassified from portfolio to direct investment in the Balance of Payments but the total holdings should be reclassified in the IIP.The classification of direct investment is based firstly on the direction of investment both for assets or liabilities; secondly, on theinvestment instrument used (shares, loans, etc.); and thirdly on the sector breakdown.As for the direction, it can be looked at it from the home and the host perspectives. From the home one, financing of any type extended by the resident parent company to its nonresident affiliated would be included as direct investment abroad. By contrast, financing of any type extended by non-resident subsidiaries, associates or branches to their resident parent company are classified as a decrease in direct investment abroad, rather than as a foreign direct investment. From the host one, the financing extended by non-resident parent companies to their resident subsidiaries, associates or branches would be recorded, in the country of residence of the affiliated companies, under foreign direct investment, and the financing extended by resident subsidiaries, associates and branches to their non-resident parent company would be classified as a decrease in foreign direct investment rather than as a direct investment abroad. This directional principle does not apply if the parent company and its subsidiaries, associates or branches have cross-holdings in each other’s share capital of more than 10%.As for the instruments, Direct investment capital transactions are made up of three basic components: (i) Equity capital; (ii) Reinvested earnings: (iii) Other direct investment capital: covering the borrowing and lending of funds, including debt securities and trade credits.Section 2: Emerge and development of International Investment Emerged early in the late 18th century, International investment has been developing into the most active driving force in the world economy today. After more than two hundred years, International investments have experienced great changes in many aspects. According to the investment size and the modes, it can be divided into four phases:From the beginning of 19 centuries to before 1914: International investments appeared because production surplus resulted from the second industrial revolution. And the indirect investment dominated in the international investment during that period.1914~1945:a slowly developing period. Due to the two world wars, international investments were held back heavily. The foreign investment value by major investor countries dropped to US $ 38 billion in 1945 when the Second World War ended. Indirect investment was still the mainmode.1945~1979:International investments started to develop again. During this period, international investments increased rapidly, the value from developed countries reaching US$600 billion in 1978 from US$51 billion in 1945. And another obvious feature is that direct investment replaced indirect investment to dominate in international investment. For example, FDI reached US$369.3 billion in 1978, accounting for 61.6% of the total from the US$20.0 billion in 1945. Please see Table 1.1 for detailed increase.Table 1.1 Private Foreign Direct Investment from Main Capitalist countries (Unit: 1 billion US$)since 1980s: a rapid development phase. Technological progress, financial innovations and globalization facilitate international investment both in FDI and indirect investment and the development speed exceeds that of GDP. Please refer to Table 1.2 for the great change. Table 1.3 for the comparison between FDI and some production indices and Table 1.4 for FPEI of developed countries.Table 1.2 International Investments in 1989 and 1999( as per the share in GDP)Source: World Bank, World Development Indicators. 2001Table 1.3 FDI and Related Production Indices (US $1billion, %)Table 1.4 Transnational transactions in Bonds and Stocks by Main DCs (% of GDP)Figure 1.1Global inflows of FDI, 1993-2002, by groups of countries$ billionsFigure 1.2Inflows of FDI to developing countries, 1995-2002, by region发展中国家FDI 分布5010015020025019951996199719981999200020012002Developing countriesAsia and the PacificLatin America/Caribbean ChinaAfricaLDCsInflows of FDI to developing countries, 1995-2002, by region$ billions发展中国家亚太地区拉美加勒比海地区非洲中国The Latest development of International investmentWorld Investment Report 2006 (WIR2006): FDI from Developing and Transition Economies Main Contents1. FDI in 2005 grew for the second consecutive year, and it was a worldwide phenomenon.2. It was spurred by cross-border M & As, with increasing deals also undertaken by collective investment funds3. Most inflows went into services, but the sharpest rise in FDI was in natural resources.4. There has been a significant increase in developing-country firms inthe universe of transnational corporations.5. Liberalization continues, but some protectionist tendencies are also emerging.6. Africa attracted much higher levels of FDI.7. South, East and South-East Asia is still the main magnet for inflows into developing countries,while West Asia received an unprecedented level of inflows.8. Latin America and the Caribbean continued to receive substantial FDI.9. FDI flows to South-East Europe and the Commonwealth of Independent States remained relatively high. while there was an upturn in FDI to developed countries.10. Overall, FDI should continue to grow in the short term.Section 3: Comment on Current International Investments Developing for more than two centuries combined with the effects of globalization and increasingly intensive competition in economy, great changes are taking place in the field of international investment. It becomes easier for investors to reach many investment instruments on the one hand, risks thereof are much more subtle and managerial technologies and skills seem much more important than ever before. So investors must be well informed of everything related and skillful with each investment vehicle as well as skills to manage them. Here are somefeatures of current international investments.1.International investment instruments increased.As economy develops, more and more international investment instruments come out of the horizon in the investment market fore investors to choose. Besides traditional vehicles such as short-term securities, common stock, fixed income securities, we also have options, futures, mutual funds, real estate, annuities, as well as many newly-created financial derivatives. As globalization and world economic integration develop, new vehicles will be increased. Therefore, it is convenient for investors to reach investment vehicles, and international investment will become more knowledge and skill demanded.2.Investment modes and patterns are diversifiedIn 1960s —1970s, private investments were, on the whole, equal with official ones. The 1990s witnessed a sea change in the pattern of international capital flows. In 1990, official sources accounted for more than half of international capital flows to developing countries. In 1991, Privatization accounted for 76 per cent of FDI inflows into Central and Eastern Europe. By 1995 over three-quarters came from private sources. The biggest story was the explosion in portfolio ( equity and debt ) investment, which soared from US$5 to us$61 billion from 1990 to 1995.The mode of investments is changing, from privatization to licensing and joint ventures. FDI predominated in the overall scale relative toindirect investment, but the share of FPEI expands swiftly, and gained and equal importance with FDI soon. This change results from the increasing demand for long-term financing, expanded credit as well as financing internationalized. Another more important reason is the fast increase of securities investment, such as development of securities market, privately held shares or stocks in foreign enterprises, increase of speculative investments and so on. In recent years Non-equity arrangement, such as technology investment, equipment rental and leasing, franchising, management contracts, partnerships, cooperative distribution, and co-contracting projects, has extensively spreaded in developing countries and become important modes of investment there.3.The profile of investors is changingFor years western developed countries have dominated the international investment. The “Triad”(The EU, Japan, the United States )occupies the major share of global investments at the present and in 1991 its share reached 86%. The profile of investors is changing now. An inspiring fact is that foreign investments from developing countries, especially newly industrialized countries and regions(NICs) have developed rapidly since 1990s, For example, foreign investments from developing countries in 1980-1984 accounted for only 5% of the global total, but they went up to 15% to US$47 billion in 1995, exhibiting an inspiring picture o investment abroad at a high speed, though its absolute share was lowthen.4.Direction of International investment is multipliedThe direction of investment has changed a lot. Instead of flowing among developed countries, a lot of investments take place within various regions or economic Groups, which wer established in 1990s for the benefits of individual country in these areas, such as NAFTA, APEC, and EU. Along with the world economic regionalization and collectivization, FDI flows tend to be regional or collective.Some newly emerging economies with fast and stable growth are the most attractive to foreign investments. For example, 80% of FDI into developing countries were absorbed by 10 fast growing developing Asian, American and European countries or regions, among which inward flows into East and Southeast Asia account for 2/3. Central and Eastern Europe are hot points for investments, too.5.FDI is shifting towards servicesIn recent decades, international investments have been shifted from traditional resource and labor-intensive fields to modern technology-intensive manufacturing and service industries. High technological enterprises, finance, insurance and service are the greatest attractions for international investments. A large share of FDI is shifting towards services industry. For example, service sector accounted for only one-quarter of the world FDI stock in the early 1970s; but in 1990 thisshare was almost half of the world total; and by 2002, it had occupied about 60% to US $4trillion. Over the same period, the share of FDI stock in the primary sector declined from 9% to 6%, and it dropped much more in the manufacturing sector, from 42% to 34%. FDI in services accounted for two thirds of the total FDI inflows on the average during 2001-2001, amounting to approximately US$500 billion.Outward FDI in services continues to be dominated by developed countries, but has become more evenly distributed among them. Developing countries’outward FDI in services began to grow wore visible from the 1990s. Their share in the global outward FDI services stock climbed from 1% in 1990 to 10% in 2002, faster than in other sectors, On the inward side, the distribution of services FDI stock has become relatively balanced, though developed countries still account for the largest share, The faster growth has taken place in Western Europe and the United States, reflecting the fact that most service FDI is market-seeking. Today, developed countries account for an estimated 72% of the inward FDI stock in services, developing economies for 25% and CEE (Central Eastern Europe ) for the balance . In 2002, the United States was the largest host economy in terms of the size of its inward FDI stock in services. With a few exceptions (such as China ), countries that have participated in the FDI boom in services also strengthened their position among home and host countries for all FDI.6.The continuing liberalization of FDI.There were 244 changes in laws and regulations affecting FDI in 2003, 220 of which were in the direction of more liberalization. In that year, 86 bilateral investment treaties (BITs) and 60 double taxation treaties (DTTs) were concluded, bringing the totals to 2265 and 2316, respectively. However, the annual number of new treaties concluded has declined, since the case of BITs in 2002 and that of DTTs in 2000. The attractiveness to FDI shows that economies such as the Czech Republic, Hong Kong and Ireland continued to absorb significant investment even during the FDI recession. In contrast, countries such as Japan, South Africa and Thailand have yet to realize their full potential to attract FDI, according to their rankings on UNCTAD’s Inward FDI potential Index as compared with that on the inward FDI performance index.In short, International investment has become an indispensable force pushing the world economy forward. No matter in what modes it is conducted, how large the size would be, what features it may have, both FDI and FPEI are undoubtedly the most vigorous force driving the world economy forward through intense international competition.。
CONTENTSAbstract (1)Ⅰ Introduction (2)ⅡGeneral Assumptions (3)ⅢKey Terminology (3)ⅣModel Development.......................................................................... (3)4.1 (4)4.1.1 (4)4.1.2 (4)4.1.3 (4)4.2 (5)4.2.1 (5)4.2.2 …………………………………................................................................ .64.2.3 (9)4.3 (9)4.3.1 (9)4.3.2 (10)4.3.3 (10)4.4 (10)4.4.1 (10)4.4.2 (10)4.4.3 (10)4.5 (13)4.5.1 (13)4.5.2 (13)4.5.3 (13)ⅤStrengths and Weakness (14)ⅥConclusion (15)ⅦReferences (16)ⅧAppendix (16)TITLEAbstract♦In our essay, we first develop a basic model to account for the fundamental but important phenomena in baseball game and then three improved models for some details. When developing the basic model, in order to analyze overall hitting process clearly, we focus on simplifying the practical problem into a mechanical model.We resolve basic model through three steps, each step considering one important part of the model that greatly impacts our searching for the “sweet spot”. After resolving the basic model, we begin to revise the model to make it more practical.♦Before resolving the basic model, we establish a criteria for evaluation-the proportion of effective energy transmission r, a criteria used to determine at which spot of the bat the maximum proportion of energy output by human is transferred to the ball. Our three steps are designed as follows:⑴In our first step, we mainly investigate the action process between the simplified baseball bat andbaseball. Ignoring other influencial factors, we find one “sweet spot”.⑵In our second step, our focus moves to the relationship between the hand and the bat. Ignoringother influencial factors, we find another “sweet spot”.⑶In our last step, we integrate merits of each “sweet spot ” in above two steps so that we find out a“sweet spot zone”. Then we figure out the variation of r in “sweet spot zone”and find the maximum r.♦After resolving the basic model, we revise our model in three aspects to make it more practical.⑴In our first improvement, we restore the simplified line and particle with objects of different shapeand find out the “sweet spot”after revision.⑵In our second improvement, we consider the shape change of the baseball bat when the bat hits theball and also calculate the lost energy consumed by the shape change of bat made of different material.After revision, we find that the position of the practical “sweet spot”should be a bit more closely than that of “sweet spot”calculated in basic model to the thin end of the bat.⑶In our last improvement, we take into account the vibration that might also impact our searchingfor the “sweet spot”.After detailed analysis, we calculated the lost energy consumed by vibration when the ball hits different spot on the bat and figure out that the position of the practical “sweet spot”should also be a bit more closely than that of “sweet spot”calculated in basic model to the thin end of the bat.♦ⅠIntroductionOn the softball field, hitters usually attempt their best to hit the baseball.In addition to the physical strength the player applied to the baseball, the hitting spot also has great influence on our searching for the sweet spot. Usually, according to the moment of momentum theorem, it seems that the fat end of the baseball bat should be the best hitting spot. However, this is known to be empirically incorrect. Experienced player usually chooses a spot called “sweet spot”to be the best hitting spot, at which the maximum power is transferred to the baseball, thus the hit ball travelling the longest distance. Howard Brody(1989) conducted a series of experiments and investigated that vibration of the baseball would affect the choice of the best hitting spot. Rod Cross(1998) proved that both center of percussion and vibration of the bat affect the searching for the sweet spot through a series of experiment. However, none of scientistshas given a theoretical method to find out the solution. In our essay, we attempt to find out and explain that the sweet spot does not lies on the end of the bat.ⅡGeneral Assumption♦The baseball and baseball bat are assumed to move at uniform velocity. Air friction and gravity can be neglected♦The direction of the velocity of the particle is assumed to collinear that of the linear veloc ity of the action point.♦Baseball bats made of different materials are assumed to attain identical energy after accelerated by human.ⅢKey TerminologyTable 1.Symbols.Symbols Description UnitsⅣModel Development4.1 Simplifying the situationIn order to address the problem, we need to simplify the hitting process. It is reasonable to abstract the process as follows: replacing the baseball bat with a single line, on which the mass is distributed uniformly, and substituting a particle for the baseball; fixing one end of the line so that the line can oscillate on the smooth ground freely; using the process that a baseball hits an oscillating rod to simulate the process that a baseball hits a bat.This is the basic and simplest model that we can extract from hitting process, based on which we can analyze the most basic motion of these two objects. However, we cannot ignore the importance of the elasticity, the vibration and the antihunt action, which might also have impact on our searching for the sweet spot.4.1.1 Basic ModelWe analyze the whole hitting process:Step oneAt the beginning of hitting, the particle moves at a fixed velocity to the line that is oscillating at a fixed angular velocity and linear velocity. The moment of the momentum of the overall system with respect to o is:1112o L m v d J ω=-+, (1) After the hitting, the particle and the line separate and move respectively. The moment of the momentum ofthe overall system with respect to o is2112o L m v d J ω''=+As exterior impulsive moment vanishes, we can then get:12o o L L =that is112112m v d J m v d J ωω''-+=+ (2) Given the material of the line and the particle, we can achieve the coefficient of the restitution between the line and the particle, a coefficient that will help us to achieve the relationships of the linear velocity of the line and the particle.1212v v k v v ''-=+ (3)22v d ω= , 22v d ω''= (4)Putting .Eq (1),(2),(3)and (4) together, we have junctions()221122121221233d m v l m v k v v v m d m l-+++⎡⎤⎣⎦'=+ (4) ()22111222222123133d k m v d km L m d m l m ωωω-+-+'=+ (5)When considering at which spot of the line the maximum power is transferred to the particle, we attempt to work out a spot at which the hit particle reaches the fastest velocity. Differentiating 1v 'with respect to d , we will achieve that when123d m ω=(6)the hit particle reaches the fastest velocity. We just define this spot as the spot of moment(SOM).Step twoIt is necessary for us to take the function of the hands into account if we want to simulate the hitting process exactly. At the instant of hitting the particle, the impulse of the particle will rotate the line unless the particle hits a specified spot on the line-the center of percussion(COP) at which the impulse will only move the translationally with no rotation. According to the momentum theorem()22221111122ox I m l m l m v v ωω''=--+ (7)If the particle hits the COP exactly, the momentum theorem o x I should be 0. Inserting .Eq (4) and (5) into .Eq (7)leads to equation:()()()1212212132062w k d l lm mvd d m l m ω+-+=+ (8)Because all of the parameters in .Eq (8)are greater than 0, only under condition that 320d l -= can the .Eq (8) result in a proper solution. Then we can know the position of the COP:23C O P d l =(9)Step threeAccording to the investigation of ……..(), if viewing hand as soft tissue, we can get the relationship between the force pressed on the tissue and the degree at which the hands ’ shape changes012aseF a-= (10)where♦ 0F represents the force pressed on hands♦ s denotes the relative displacement of the point on palm♦ b and c are constants which have been discussed in !!!!!!!!!!!!!!!!!!!!!!!!!文献As the the force pressed on palm generates the relative displacement, the hand apply negative force on the line, thereby absorbing part of the energy transferred from our arms to the particle. We can easily figure out the lost energy through definite integral:100s w F ds =⎰(11)212ase asa-+-=At the instant of hitting, the energy transferred from the line to the particle is:22222221126w J m l ωω== (12)The energy achieved by the particle is:22011111122w m v m v '=- (13) To transfer the maximum proportion of power output from the human body to the particle, we define this proportion as12w p w w =+ (14)Plugging .Eq (4),(5),(10),(11),(12),(13) into .Eq (14),we have()()()2222211121222112222122231122310.3672as m d m v K l m v dl m K m v d m l mp easaωω-+++-++=-+-+空As the value of p varies when the hitting spot on the rod changes, the variation of p with respect to0d and K is pictured in Fig.14.1.2 Improvement ⅠWith the purpose of improving the practicability, we have to restore the single line and the particle with bodies of axisymmetry (In effect, both the baseball and the bat are axisymmetry). In this way, our model more closely resembles the real hitting process. In this situation, we regard the two bodies as rigid bodies. Unlike the moment of inertia of a line, the moment of inertia of the bat has to be calculated through definite integral. Since we cannot attain the equation of the generating line of the equation, here is an example to compute the moment of inertia of a circular cone to illustrate our methods.In practice, the motion state of an axisymmetrical body, the mass of which is distributed uniformly, is usually equivalent to that of its axis line, on which the mass of the body concentrates. However, the mass is unevenly distributed on the axis line. By computing the moment of inertia of the axis line, we will reach the same result as calculating the moment of inertia of the circular cone. Like circular cone, all of the axisymmetrical bodies can also be figured out in this way.4.1.4 Improvement ⅡAssume that the ball is completely elastic and the energy dissipation mainly stems from the deformation of the bat. As suggested by Adair (2002), the hitting between the bat and the baseball can be reasonably modeled by a ball and a flat without introducing large error. This collision can be simply described as Figure 1. Denoting by R the radius of the ball and by δ the depth of the indentation, the equation of the sphere, on the surface of contact, is[]222()r z R R δ++-= (14)Figure 1. The indentation by a baseball.For shallow indentations /1R δ and /1z R , where in the second inequality the coordinate z is meant to be on the indented surface. According to Asaro and Lubarda (2006), the distributed force takes theform1/2202()1r q r q a ⎛⎫=- ⎪⎝⎭ (15)The total hitting force is1/22200202213a r P q rdr a q a ππ⎛⎫=-=⎪⎝⎭⎰(16)The displacement of the indented surface is given as22212a r w R a ⎛⎫=- ⎪⎝⎭r a ≤ (17) or alternatively, in terms of the depth δ of the indentation,22rw Rδ=-r ≤ (18)Consequently, the energy bat E absorbed by the bat can be expressed as4200232d 55a bat q a a P E qwr r RRππ==⎰(19)4.1.4 Improvement ⅢBy employing the d ’Alembert ’s Principle, one gets the equilibrium equation:()()22,s s s F y x dx F F dx f x t dx t x ρ∂∂⎛⎫=-++ ⎪∂∂⎝⎭(20)where()x ρdenotesthe quality of the unit lengths F is shear force(),f x t is external excitation.Here the shear deformation and the rotation of the cross section are neglected. The small element satisfies the momentum balance which requires(),02s Mdx M dx M F dx f x t dxx ∂⎛⎫+---= ⎪∂⎝⎭(21)Droping the high order small quantity yieldss M F x∂=∂ (22)According to the mechanics of materials, the moment relates the deflection by:()()()2,,y x tM x t E I x x∂=∂ (23) Inserting .Eq (22) and (23) into (21) leads to:()()()()()222222,,,y x t y x t EI x x f x t x x t ρ⎡⎤∂∂∂+=⎢⎥∂∂∂⎣⎦(24)The dynamic equation (24) provides unified theoretical framwork for considering the vibration arbitrayrod or beam. When the rod is uniform, in both quality and shape, the .Eq (24) reduces to()()()4242,,,y x t y x t EIfx t xtρ∂∂+=∂∂ (25)Under our current interest, namely, the hitting between the baseball and the rod, the impulse reads()(),,0F x d tfx t δ⎧-=⎨⎩(26)Where F represents the impulse force By writing()()(),y x t x q t φ=we have()()()2200qt q t E I x ωφωρφ⎧+=⎪⎨''''-=⎪⎩(27) ()()()440x x φβφ-= (28)Obiviously, the solution of ()q t is()()sin q t A t ωθ=+ (29)The homogeneous solution of (27)is()1234cos sin cosh sinh x c x c x c x c x φββββ=+++ (30) Where ()1,2,3,4i c i =are constants which are yet to be determined by following boundary conditions:()()()()()00, 000EI K l l φφφφφ'''=-=⎧⎪⎨'''''==⎪⎩(31) From .Eq (31),we obtain the frequency equation()()()()()()c o s h s i n c o s s i n h 0K l K c o n s l E I l E I l l βββββββ+⋅+-= (32)If 0K =, .Eq (32) reduces tot a n t a n h l l ββ=(33)Normalizing .Eq (32)as:()()()()()00cosh cos sin cos sinh 0K l K l l l l βββββ++-=⎡⎤⎣⎦ (34)with 0K K EI β=Assigning K with a certain value ranged from 0 to 1, we attempt to find out the numerical solution offrequency.The variation of .Eq (34) with respect to l β is illustrated in Fig.1. As can be seen from the figure, the first two-oder frequencies are 3.87701 and 7.01587, respectively, when 0.1K =.重画图4.2 Model ⅡBecause wood has been removed from the bat and replaced by some substance with a s maller density than the wood, not only is the bat lighter, but the center of the gravity of the bat moves closer to the thin end. Since center of percussion(COP) and is relavant to the center of the gravity , the COP also movesJ M α=212t t ωαϕα=⎧⎪⎨=⎪⎩22αϕω⇒= We can get the mechanical energy of the bat:212E J ω=122E J J αϕαϕ=⋅=E Mϕ=4.2.14.2.24.2.34.3 Model Ⅲ4.3.14.3.24.3.34.44.4.14.4.24.4.34.54.5.14.5.24.5.3ⅤStrengths and WeaknessesStrengths♦Our basic model’s strength is that we consider the whole process of energy transmission, energy from hand to bat to baseball.♦We view the palm of the hand as soft tissue and consider the shape change of the hand so that we can model the strengths the hand press on the bat.♦The improvement in basic model take into account the energy loss from vibration, and we develop the “simple support and spring” model to model the function of human hand.♦We consider and compute the lost energy consumed by the shape change of the bat.WeaknessesSince neglecting the data of several parameters in the model, we have difficulty in deducing a perfect solution. We introduce some examples so as to illustrate our method.ⅥConclusionⅦReferencesⅧAppendix。
纽带英语作文In the vast tapestry of human communication, the English language stands out as a vibrant thread that weaves together diverse cultures and nations. It serves as a bridge, connecting people across the globe, fostering understanding and cooperation. Here is an essay that explores the role of English as a bond that unites us all.The Bond of English: Uniting the World Through LanguageIn an increasingly interconnected world, the importance of a common language cannot be overstated. English, with its widespread use and influence, has emerged as the quintessential global lingua franca. It is the language of diplomacy, business, science, and the arts, allowing people from different backgrounds to communicate and collaborate effectively.The Role of English in International RelationsDiplomacy is one of the key areas where English plays a pivotal role. International negotiations, treaties, and agreements are often conducted in English, ensuring that all parties can understand and engage with the discussions. This common ground is crucial for maintaining peace and resolving conflicts around the world.English in the Business WorldThe global economy thrives on the exchange of ideas and goods. English is the de facto language of international business, facilitating trade and investment across borders. It is the language of multinational corporations, financialinstitutions, and global markets, enabling professionals to negotiate deals and build partnerships.The Power of English in Education and ResearchIn the realm of academia, English is the language of scholarship. Scientific journals, research papers, and academic conferences are predominantly in English, making it essential for scholars to publish their work and contributeto the global pool of knowledge. This accessibility fosters innovation and the sharing of discoveries that can benefitall of humanity.Cultural Exchange Through EnglishBeyond the professional sphere, English is a gateway to understanding different cultures. It is the language of cinema, literature, and the internet, offering a platform for the exchange of stories, ideas, and values. Through English, we can explore the richness of other cultures and share our own, fostering a sense of global community.Challenges and OpportunitiesWhile English serves as a powerful bond, it also presents challenges. Not everyone has equal access to English education, and the dominance of English can sometimes overshadow other languages and cultures. However, the opportunity to learn English opens doors to new experiences, broadens horizons, and empowers individuals to participate in the global conversation.ConclusionIn conclusion, English is more than just a language; it is a vital link that connects people from all corners of the world. It is a tool for communication, a platform for collaboration, and a bridge to understanding. As we continue to navigate the complexities of our global society, the role of English as a unifying force will only grow in significance. It is our collective responsibility to ensure that the benefits of this linguistic bond are accessible to all, enriching our shared human experience.。
CHAPTER 1INTRODUCTIONChapter OrganizationWhat is International Economics About?The Gains from TradeThe Pattern of TradeProtectionismThe Balance of PaymentsExchange-Rate DeterminationInternational Policy CoordinationThe International Capital MarketInternational Economics: Trade and MoneyCHAPTER OVERVIEWThe intent of this chapter is to provide both an overview of the subject matter of international economics and to provide a guide to the organization of the text. It is relatively easy for an instructor to motivate the study of international trade and finance. The front pages of newspapers, the covers of magazines, and the lead reports of television news broadcasts herald the interdependence of the U.S. economy with the rest of the world. This interdependence may also be recognized by students through their purchases of imports of all sorts of goods, their personal observations of the effects of dislocations due to international competition, and their experience through travel abroad.The study of the theory of international economics generates an understanding of many key events that shape our domestic and international environment. In recent history, these events include the causes and consequences of the large current account deficits of the United States; the dramatic appreciation of the dollar during the first half of the 1980s followed by its rapid depreciation in the second half of the 1980s; the Latin American debt crisis of the 1980s and the Mexico crisis in late 1994; and the increased pressures for industry protection against foreign competition broadly voiced in the late 1980s and more vocally espoused in the first half of the 1990s. Most recently, the financial crisis that began in East Asia in 1997 andspread to many countries around the globe and the Economic and Monetary Union in Europe have highlighted the way in which various national economies are linked and how important it is for us to understand these connections. At the same time, protests at global economic meetings have highlighted opposition to globalization. The text material will enable students to understand the economic context in which such events occur.Chapter 1 of the text presents data demonstrating the growth in trade and increasing importance of international economics. This chapter also highlights and briefly discusses seven themes which arise throughout the book. These themes include: 1) the gains from trade;2) the pattern of trade; 3) protectionism; 4), the balance of payments; 5) exchange rate determination; 6) international policy coordination; and 7) the international capital market. Students will recognize that many of the central policy debates occurring today come under the rubric of one of these themes. Indeed, it is often a fruitful heuristic to use current events to illustrate the force of the key themes and arguments which are presented throughout the text.。