当前位置:文档之家› 英语文体学学期论文范文

英语文体学学期论文范文

英语文体学学期论文范文
英语文体学学期论文范文

英语文体学学期论文范文

英语文体学学期论文范文-Stylistic Analysis of Brack Obamas Victory SpeechAbstract: Public speech is an art. It presents the features of formal written language while exhibiting characteristics of the spoken. Barack Obama ,an excellent speaker, addressed his victory speech on NOV 5, 2008 in Chicago. This speech, which is very convincing, is considered a classic. This paper analysis the speech from four aspects: content, grammatical features, lexical features and semantic features. Through the essay, we can have a better understanding of the public speech.Key Words: Obama, victory speech; stylistic analysisOn NOV 5,2008,Barack Obama was elected the 44th president of America, becoming the first national leader in American history. On the evening, Obama addressed his victory speech in Chicago. The theme of Obamas victory speech is change is coming to America in response to the special period of US. Form the perspective of stylistics, the speech can be analyzed form four aspects: content, grammatical features, lexical features and semantic features.1.Introduction of the contentIn terms of the main idea of the speech, it can be divided into five parts, including:celebration(para.1-5),thanks(para.6-10),challenge(para.3

0-32).Those parts are developed naturally and connected with each other coherently, which serves for the unity of the theme.2.Grammatical features2.1Variation in sentence lengthThere are 83 sentences and 2067 words in Obamas Victoty Speech. The length of sentences varies with the change emotional state of mind of the Obama. The average length is 25 words per sentence, which show the trait of formal written language. But Obama does not use too much long sentence to confuse the audience. Short sentences, which are easier to remember and to understand also server to deliver his massage clearly.2.2Different sentence typesIn this speech, composite sentences are very common, while simple sentences just account for a little part. Obama rarely uses s structure. Instead, he applied of, that and who to put the modifier part behind. By using postposition structure, he makes the content more precise and adds a sense of elegance and gravity to the speech.Besides, all the sentences in the speech are statement without a few questions. Because the aim of speech is to deliver the massage of yes we can, he utilizes affirmative tone to emphasize his and American peoples confidence. The application of command also helps to enhance the interaction of the addresser and the addresses.3 lexical features3.1DictionAs Obamas victory speech has been meticulously prepares, every word has been

carefully chosen to express the accurate meaning. It is clearly that Obama avoids using too much big words in order to make his speech easy to understand and popular. However, as a political speech, abstract words are indispensable. Therefore, we can find democracy, enormity, mortgage, humanity and determination this kind of words. These words which may increase the difficulty to understand to some extend. can make the speech very formal and compelling.Furthermore, there are less than 100 adjectives in this 2,067-word speech. Apparently, Obama uses adjectives as few as possible to keep his stand objective and fair. But those he uses clearly express his emotions: like thriving, hopeful, steep, long and so on.3.2Various personal pronounWhen delivering his speech, Obama uses various personal pronouns to address the audience.Obama uses first person frequently. We, our, and us contribute to involve the audience, making them feel that they are on equal terms with the president. Thus it is easier for the speaker to win the support of the listeners, who immediately feel close to the speaker when hearing the expression we ,our, and us contribute to involve the audience, making them feel that they are on equal terms with the president. Thus it is easier for the speaker to win the support of the listens, who immediately feel close to the speaker when hearing the expression we or our. Obama involves all the

audience and makes them feel that they are the ones whom he is speaking to . In this speech, he changes personal pronoun from time to time. By the conversion of personal pronouns, he manage to make the speech flexible and rousing.4. Semantic featuresTo make the speech an impressive one instead of a political clich, a variety of figures of speech are used, which includes phonetic stylistic devices, lexical stylistic devices and syntactical stylistic devices.4.1 phonetic stylistic devicesIn order to make the speech sound fluent, a lot of alliterations are applied, For example, in the sentence Let us resist the temptation to fall back on the same partisanship and pettiness and immaturity that have poisoned our politics for so long. Partisanship and pettiness poisoned and politics have the same consonants, which sound rhythmical and harmonious and clearly embodies the determination of the president. The frequent use of alliteration makes the narration brief but precise, which can easily draw the attention of the audience and show the speakers opinion powerfully. 4.2 Lexical stylistic devicesMetaphors and allusions are highlights in the speech. In the sentence The road ahead will be long. Our climb will be steep, the tenors for the road and our climb are actually the hardship that Americans will be confronted with. Then, Obama encourages American people that Americans beacon still burns as

bright, and here he uses metaphor to convey the information that America is still very strong and will be strong enough to conquer the difficulties. By comparing the abstract content to concrete things, he adds vitality to the whole speech.4.3 Syntactical stylistic devicesThe diversity of syntactical structure makes the speech eminent. At the very beginning of the speech, he uses a paralleled sentence to claim the audiences attention. After the opening-up, a number of parallelisms used in the speech. Besides, a lot of repetitions can also appear, such as block by block, brick by brick, calloused hand by calloused hand and the impressive slogan Yes we can which appears 7 times(in para 24,25,2627,28,29 and 31) and gradually pushes the speech to the crescendo of emotion. The application of repetitions and parallelism actually has similar effect: it makes the whole speech organized in order and highlight the topic, which is overwhelming and convincing.Furthermore, antithesis, a rhetorical device which is favored by many president of America, plays a significant role in the speech. In paragraph 3,Obama says It s the answer spoken by young and old, rich and poor, Democrat and Republican, black, whiten Hispanic, Asian, Native American ,gay, straight, disabled and not disabled Here, by addressing people from all walks of life, Obama shows his concern for every single American. It reflects the Americans belief: all men

are created equal. By using antithesis, he emphasizes his opinions and delivers his message clearly.5.Conclusion From what has been discussed above, we can see that the victory speech of Obama embodies the characteristics of public speech. By covering rich content, Obama creates an inclusive sense of history; by using diversified rhetorical devices, he spruces up the whole speech and makes it infectious; by quoting former great mens dictums, he echoes with the great spirit of America and marks himself as one of the great speakers. To sum up, the victory speech of Obama shows his distinct style and speaks out the inner voice of American in that crucial period.参考文献:[1]徐有志.English stylistics[M]北京:高等教育出版社,2005.[2]文秉龙,李智允.奥巴马的演讲艺术[M].北京:机械工业出版社,2010[3]王佐良,丁往道.英语文体学引论[M].北京:外语教学与研究出版社,1978[4]曾亚平,黄振定.论奥巴马总统竞选获胜演讲的文体风格[J]湖南大学学报:社会科学版,2009,5(3)[5]郭瑞,王秋生.奥巴马竞选获胜演讲的修辞分析[J],文教资料,2009(4)Appendix:SENATOR BARACK OBAMA: (Cheers, applause.) Hello, Chicago. (Cheers, applause.)If there is anyone out there who still doubts that America is a place where all things are possible, who still wonders if the dream of our Founders is alive in our time, who still questions the power of our democracy, tonight is your answer. (Cheers, applause.)It’s the answer told by lines that

stretched around schools and churches in numbers this nation has never seen, by people who waited three hours and four hours, many for the first time in their lives, because they believed that this time must be different, that their voices could be that difference.It’s the answer spoken by young and old, rich and poor, Democrat and Republican, black, white, Hispanic, Asian, Native American, gay, straight, disabled and not disabled -- (cheers) -- Americans who sent a message to the world that we have never been just a collection of individuals or a collection of red states and blue states; we are and always will be the United States of America. (Cheers, applause.)It’s the answer that -- that led those who’ve been told for so long by so many to be cynical and fearful and doubtful about what we can achieve to put their hands on the arc of history and bend it once more toward the hope of a better day. It’s been a long time coming, but tonight, because of what we did on this day, in this election, at this defining moment, change has come to America. (Cheers, applause.)A little bit earlier this evening, I received an extraordinarily gracious call from Senator McCain. (Cheers, applause.) Senator McCain fought long and hard in this campaign, and he’s fought even longer and harder for the country that he loves. He has endured sacrifices for America that most of us cannot begin to imagine. We are better off for the service rendered by this

brave and selfless leader. (Applause.) I congratulate him, I congratulate Governor Palin for all they’ve achieved, and I look forward to working with them to renew this nation’s promise in the months ahead. (Cheers, applause.) I want to thank my partner in this journey, a man who campaigned from his heart and spoke for the men and women he grew up with on the streets of Scranton, and rode with on the train home to Delaware, the vice president-elect of the United States, Joe Biden. (Cheers, applause.)And I would not be standing here tonight without the unyielding support of my best friend for the last 16 years, the rock of our family, the love of my life, the nation’s next first lady, Michelle Obama. (Cheers, applause.)Sasha and Malia, I love you both more than you can imagine, and you have earned the new puppy that’s coming with us to the White House. (Cheers, applause.)And while she’s no longer with us, I know my grandmother is watching, along with the family that made me who I am. I miss them tonight, and know that my debt to them is beyond measure.To my sister Maya, my sister Auma, all my other brothers and sisters, thank you so much for all the support that you’ve given to me. I am grateful to them. (Cheers, applause.)And to my campaign manager, David Plouffe -- (cheers, applause) -- the unsung hero of this campaign who built the best -- (cheers) -- the best political campaign I think in

the history of the United States of America -- (cheers, applause) -- to my chief strategist, David Axelrod -- (cheers, applause) -- who has been a partner with me every step of the way, to the best campaign team ever assembled in the history of politics -- (cheers) -- you made this happen, and I am forever grateful for what you’ve sacrificed to get it done. (Cheers, applause.)But above all, I will never forget who this victory truly belongs to. It belongs to you. (Cheers, applause.) It belongs to you. (Cheers.)

I was never the likeliest candidate for this office. We didn’t start with much money or many endorsements. Our campaign was not hatched in the halls of Washington; it began in the backyards of Des Moines and the living rooms of Concord and the front porches of Charleston. It was built by working men and women who dug into what little savings they had to give $5 and $10 and $20 to the cause. (Cheers, applause.) It grew strength from the young people who rejected the myth of their generation’s apathy -- (cheers) -- who left their homes and their families for jobs that offered little pay and less sleep. It drew strength from the not-so-young people who braved the bitter cold and scorching heat to knock on the doors of perfect strangers, and from the millions of Americans who volunteered and organized, and proved that more than two centuries later a government of the people, by the people and for

the people has not perished from the Earth. This is your victory. (Cheers, applause.)Now, I know you didn’t do this just to win an election, and I know you didn’t do it for me. You did it because you understand the enormity of the task that lies ahead. For even as we celebrate tonight, we know the challenges that tomorrow will bring are the greatest of our lifetime: two wars, a planet in peril, the worst financial crisis in a century. Even as we stand here tonight, we know there are brave Americans waking up in the deserts of Iraq and the mountains of Afghanistan to risk their lives for us. There are mothers and fathers who will lie awake after their children fall asleep and wonder how they’ll make the mortgage or pay their doctors’bills or save enough for their child’s college education.There’s new energy to harness, new jobs to be created, new schools to build, and threats to meet, alliances to repair.The road ahead will be long. Our climb will be steep. We may not get there in one year or even in one term, but America, I have never been more hopeful than I am tonight that we will get there. I promise you: We as a people will get there. (Cheers, applause.)AUDIENCE: Yes, we can! Yes, we can! Yes, we can! Yes, we can! Yes, we can!MR. OBAMA: There will be setbacks and false starts. There are many who won’t agree with every decision or policy I make as president, and we know the government can’t

solve every problem. But I will always be honest with you about the challenges we face. I will listen to you, especially when we disagree. And above all, I will ask you to join in the work of remaking this nation the only way it’s been done in America for 221 years -- block by block, brick by brick, calloused hand by calloused hand.What began 21 months ago in the depths of winter cannot end on this autumn night. This victory alone is not the change we seek; it is only the chance for us to make that change.And that cannot happen if we go back to the way things were. It can’t happen without you, without a new spirit of service, a new spirit of sacrifice. So let us summon a new spirit of patriotism, of responsibility where each of us resolves to pitch in and work harder and look after not only ourselves, but each other.Let us remember that if this financial crisis taught us anything, it’s that we cannot have a thriving Wall Street while Main Street suffers. In this country, we rise or fall as one nation; as one people. Let’s resist the temptation to fall back on the same partisanship and pettiness and immaturity that has poisoned our politics for so long. Let’s remember that it was a man from this state who first carried the banner of the Republican Party to the White House -- a party founded on the values of self-reliance and individual liberty and national unity. Those are values we all share. And while the Democratic Party has won a

great victory tonight, we do so with a measure of humility and determination to heal the divides that have held back our progress. (Cheers, applause.)

As Lincoln said to a nation far more divided than ours, We are not enemies, but friends -- though passion may have strained it must not break our bonds of affection. And to those Americans whose support I have yet to earn, I may not have won your vote tonight, but I hear your voices, I need your help, and I will be your president too. (Cheers, applause.)And to all those watching tonight from beyond our shores, from parliaments and palaces to those who are huddled around radios in the forgotten corners of the world, our stories are singular, but our destiny is shared, and a new dawn of American leadership is at hand. (Cheers, applause.) To those -- to those who would tear the world down: we will defeat you. (Cheers, applause.) To those who seek peace and security: we support you. (Cheers, applause.) And to all those who have wondered if America’s beacon still burns as bright: tonight we proved once more that the true strength of our nation comes not from the might of our arms or the scale of our wealth, but from the enduring power of our ideals -- democracy, liberty, opportunity and unyielding hope. (Cheers, applause.)That’s the true genius of America, that America can change. Our union can be perfected. And what we have

already achieved gives us hope for what we can and must achieve tomorrow.This election had many firsts and many stories that will be told for generations. But one that’s on my mind tonight’s about a woman who cast her ballot in Atlanta. She is a lot like the millions of others who stood in line to make their voice heard in this election, except for one thing: Ann Nixon Cooper is 106 years old. (Cheers, applause.)She was born just a generation past slavery; a time when there were no cars on the road or planes in the sky; when someone like her couldn’t vote for two reasons, because she was a woman and because of the color of her skin. And tonight, I think about all that she’s seen throughout her century in America: the heartache and the hope, the struggle and the progress, the times we were told that we can’t, and the people who pressed on with that American creed, yes we can.At a time when women’s voices were silenced and their hopes dismissed, she lived to see them stand up and speak out and reach for the ballot. Yes we can.When there was despair in the Dust Bowl and depression across the land, she saw a nation conquer fear itself with a New Deal, new jobs, a new sense of common purpose. Yes we can.AUDIENCE: Yes we can!MR. OBAMA: When the bombs fell on our harbor and tyranny threatened the world, she was there to witness a generation rise to greatness and a democracy was saved. Yes we can.AUDIENCE:

Yes we can!MR. OBAMA: She was there for the buses in Montgomery, the hoses in Birmingham, a bridge in Selma, and a preacher from Atlanta who told a people that We shall overcome. Yes we can.AUDIENCE: Yes we can!MR. OBAMA: A man touched down on the Moon, a wall came down in Berlin, a world was connected by our own science and imagination. And this year, in this election, she touched her finger to a screen and cast her vote, because after 106 years in America, through the best of times and the darkest of hours, she knows how America can change.Yes, we can.AUDIENCE: Yes, we can.MR. OBAMA: America, we have come so far. We have seen so much. But there’s so much more to do. So tonight let us ask ourselves, if our children should live to see the next century, if my daughters should be so lucky to live as long as Ann Nixon Cooper, what change will they see? What progress will we have made?This is our chance to answer that call. This is our moment. This is our time -- to put our people back to work and open doors of opportunity for our kids; to restore prosperity and promote the cause of peace; to reclaim the American dream and reaffirm that fundamental truth that out of many, we are one; that while we breathe, we hope; and where we are met with cynicism and doubt and those who tell us that we can’t, we will respond with that timeless creed that sums up the spirit of a people: Yes, we

can.AUDIENCE: Yes, we can.MR. OBAMA: Thank you. God bless you. And may God bless the United States of America. (Cheers, applause.)SENATOR BARACK OBAMA: (Cheers, applause.) Hello, Chicago. (Cheers, applause.)If there is anyone out there who still doubts that America is a place where all things are possible, who still wonders if the dream of our Founders is alive in our time, who still questions the power of our democracy, tonight is your answer. (Cheers, applause.) It’s the answer told by lines that stretched around schools and churches in numbers this nation has never seen, by people who waited three hours and four hours, many for the first time in their lives, because they believed that this time must be different, that their voices could be that difference.It’s the answer spoken by young and old, rich and poor, Democrat and Republican, black, white, Hispanic, Asian, Native American, gay, straight, disabled and not disabled -- (cheers) -- Americans who sent a message to the world that we have never been just a collection of individuals or a collection of red states and blue states; we are and always will be the United States of America. (Cheers, applause.)It’s the answer that -- that led those who’ve been told for so long by so many to be cynical and fearful and doubtful about what we can achieve to put their hands on the arc of history and bend it once more toward the hope of a better day. It’s been a long

time coming, but tonight, because of what we did on this day, in this election, at this defining moment, change has come to America. (Cheers, applause.)A little bit earlier this evening, I received an extraordinarily gracious call from Senator McCain. (Cheers, applause.) Senator McCain fought long and hard in this campaign, and he’s fought even longer and harder for the country that he loves. He has endured sacrifices for America that most of us cannot begin to imagine. We are better off for the service rendered by this brave and selfless leader. (Applause.) I congratulate him, I congratulate Governor Palin for all they’ve achieved, and I look forward to working with them to renew this nation’s promise in the months ahead. (Cheers, applause.)I want to thank my partner in this journey, a man who campaigned from his heart and spoke for the men and women he grew up with on the streets of Scranton, and rode with on the train home to Delaware, the vice president-elect of the United States, Joe Biden. (Cheers, applause.)And I would not be standing here tonight without the unyielding support of my best friend for the last 16 years, the rock of our family, the love of my life, the nation’s next first lady, Michelle Obama. (Cheers, applause.)Sasha and Malia, I love you both more than you can imagine, and you have earned the new puppy that’s coming with us to the White House. (Cheers, applause.)And while

she’s no longer with us, I know my grandmother is watching, along with the family that made me who I am. I miss them tonight, and know that my debt to them is beyond measure.To my sister Maya, my sister Auma, all my other brothers and sisters, thank you so much for all the support that you’ve given to me. I am grateful to them. (Cheers, applause.)And to my campaign manager, David Plouffe -- (cheers, applause) -- the unsung hero of this campaign who built the best -- (cheers) -- the best political campaign I think in the history of the United States of America -- (cheers, applause) -- to my chief strategist, David Axelrod -- (cheers, applause) -- who has been a partner with me every step of the way, to the best campaign team ever assembled in the history of politics -- (cheers) -- you made this happen, and I am forever grateful for what you’ve sacrificed to get it done. (Cheers, applause.)But above all, I will never forget who this victory truly belongs to. It belongs to you. (Cheers, applause.) It belongs to you. (Cheers.)

I was never the likeliest candidate for this office. We didn’t start with much money or many endorsements. Our campaign was not hatched in the halls of Washington; it began in the backyards of Des Moines and the living rooms of Concord and the front porches of Charleston. It was built by working men and women who dug into what little savings they had to give $5 and $10 and $20 to the

cause. (Cheers, applause.) It grew strength from the young people who rejected the myth of their generation’s apathy -- (cheers) -- who left their homes and their families for jobs that offered little pay and less sleep. It drew strength from the not-so-young people who braved the bitter cold and scorching heat to knock on the doors of perfect strangers, and from the millions of Americans who volunteered and organized, and proved that more than two centuries later a government of the people, by the people and for the people has not perished from the Earth. This is your victory. (Cheers, applause.)Now, I know you didn’t do this just to win an election, and I know you didn’t do it for me. You did it because you understand the enormity of the task that lies ahead. For even as we celebrate tonight, we know the challenges that tomorrow will bring are the greatest of our lifetime: two wars, a planet in peril, the worst financial crisis in a century. Even as we stand here tonight, we know there are brave Americans waking up in the deserts of Iraq and the mountains of Afghanistan to risk their lives for us. There are mothers and fathers who will lie awake after their children fall asleep and wonder how they’ll make the mortgage or pay their doctors’ bills or save enough for their child’s college education. There’s new energy to harness, new jobs to be created, new schools to build, and threats to meet, alliances to repair.The road

ahead will be long. Our climb will be steep. We may not get there in one year or even in one term, but America, I have never been more hopeful than I am tonight that we will get there. I promise you: We as a people will get there. (Cheers, applause.)AUDIENCE: Yes, we can! Yes, we can! Yes, we can! Yes, we can! Yes, we can!MR. OBAMA: There will be setbacks and false starts. There are many who won’t agree with every decision or policy I make as president, and we know the government can’t solve every problem. But I will always be honest with you about the challenges we face. I will listen to you, especially when we disagree. And above all, I will ask you to join in the work of remaking this nation the only way it’s been done in America for 221 years -- block by block, brick by brick, calloused hand by calloused hand.What began 21 months ago in the depths of winter cannot end on this autumn night. This victory alone is not the change we seek; it is only the chance for us to make that change.And that cannot happen if we go back to the way things were. It can’t happen without you, without a new spirit of service, a new spirit of sacrifice. So let us summon a new spirit of patriotism, of responsibility where each of us resolves to pitch in and work harder and look after not only ourselves, but each other.Let us remember that if this financial crisis taught us anything, it’s that we cannot have a thriving Wall Street while Main Street

suffers. In this country, we rise or fall as one nation; as one people.Let’s resist the temptation to fall back on the same partisanship and pettiness and immaturity that has poisoned our politics for so long. Let’s remember that it was a man from this state who first carried the banner of the Republican Party to the White House -- a party founded on the values of self-reliance and individual liberty and national unity. Those are values we all share. And while the Democratic Party has won a great victory tonight, we do so with a measure of humility and determination to heal the divides that have held back our progress. (Cheers, applause.)

As Lincoln said to a nation far more divided than ours, We are not enemies, but friends -- though passion may have strained it must not break our bonds of affection. And to those Americans whose support I have yet to earn, I may not have won your vote tonight, but I hear your voices, I need your help, and I will be your president too. (Cheers, applause.)And to all those watching tonight from beyond our shores, from parliaments and palaces to those who are huddled around radios in the forgotten corners of the world, our stories are singular, but our destiny is shared, and a new dawn of American leadership is at hand. (Cheers, applause.) To those -- to those who would tear the world down: we will defeat you. (Cheers, applause.) To those who seek peace and security: we support you.

英国文学史期中论文

An Analysis of the Design of the First Assembly in Pride and Prejudice [Abstract] In Pride and Prejudice, the first assembly is the stage of the debut of hero, Darcy and the heroine, Elizabeth. Therefore, the design of this assembly, including which part of the assembly should be narrated directly in the description of the assembly, how to do with other things happened during the party, how to shape the characteristics and personality of the two main characters as well as other important role on the assembly, is essentially significant to the character portrait for the whole novel. Mainly employing description of language and technique of comparative description, the plot about this assembly is well-designed as three parts, before, during and after the assembly, which is efficient to the character figuring of the novel. [Keywords] character figuring, design, description of language, comparative description The novel introduces the first assembly in Chapter 3, using only half of a chapter to directly describe things happened on the party while two other whole chapter to show people’s discussion on it. By the delicate design, vivid language description and useful comparative description, the description of this party is highly efficient to the chapter portrait of this novel. Before the party, Mrs. Bennet’s worry about Mr. Bingley’s going into the town is showed, which totally reveals the purpose of Mrs. Bennet’s participating in the dinner, again echoing the description of Mrs. Bennet’s saying "If I can but see one of my daughters happily settled at Netherfield, and all the others equally well married, I shall have nothing to wish for." (Austen, 2001: 2) at former plot. In the case, the assembly is platform to looking for sweetheart, love and even possible marriage (Yang, 91). At the end of this paragraph, Mr. Bingley’s invitating his sisters and Darcy leads to the appearance of these important characters. For the description of things happened during the party, instead of using scene description to the setting of the ball or psychological description to the participators, language description organized by comparative technique is mainly employed to mould different personality of different participant. First of all, It can be directly seen that the description of Mr. Hurst’s and Mr. Darcy’s first appearance is put in the same paragraph and connected by the conjunction “but”,

概率论毕业论文外文翻译

Statistical hypothesis testing Adriana Albu,Loredana Ungureanu Politehnica University Timisoara,adrianaa@aut.utt.ro Politehnica University Timisoara,loredanau@aut.utt.ro Abstract In this article,we present a Bayesian statistical hypothesis testing inspection, testing theory and the process Mentioned hypothesis testing in the real world and the importance of, and successful test of the Notes. Key words Bayesian hypothesis testing; Bayesian inference;Test of significance Introduction A statistical hypothesis test is a method of making decisions using data, whether from a controlled experiment or an observational study (not controlled). In statistics, a result is called statistically significant if it is unlikely to have occurred by chance alone, according to a pre-determined threshold probability, the significance level. The phrase "test of significance" was coined by Ronald Fisher: "Critical tests of this kind may be called tests of significance, and when such tests are available we may discover whether a second sample is or is not significantly different from the first."[1] Hypothesis testing is sometimes called confirmatory data analysis, in contrast to exploratory data analysis. In frequency probability,these decisions are almost always made using null-hypothesis tests. These are tests that answer the question Assuming that the null hypothesis is true, what is the probability of observing a value for the test statistic that is at [] least as extreme as the value that was actually observed?) 2 More formally, they represent answers to the question, posed before undertaking an experiment,of what outcomes of the experiment would lead to rejection of the null hypothesis for a pre-specified probability of an incorrect rejection. One use of hypothesis testing is deciding whether experimental results contain enough information to cast doubt on conventional wisdom. Statistical hypothesis testing is a key technique of frequentist statistical inference. The Bayesian approach to hypothesis testing is to base rejection of the hypothesis on the posterior probability.[3][4]Other approaches to reaching a decision based on data are available via decision theory and optimal decisions. The critical region of a hypothesis test is the set of all outcomes which cause the null hypothesis to be rejected in favor of the alternative hypothesis. The critical region is usually denoted by the letter C. One-sample tests are appropriate when a sample is being compared to the population from a hypothesis. The population characteristics are known from theory or are calculated from the population.

毕业论文外文翻译模版

吉林化工学院理学院 毕业论文外文翻译English Title(Times New Roman ,三号) 学生学号:08810219 学生姓名:袁庚文 专业班级:信息与计算科学0802 指导教师:赵瑛 职称副教授 起止日期:2012.2.27~2012.3.14 吉林化工学院 Jilin Institute of Chemical Technology

1 外文翻译的基本内容 应选择与本课题密切相关的外文文献(学术期刊网上的),译成中文,与原文装订在一起并独立成册。在毕业答辩前,同论文一起上交。译文字数不应少于3000个汉字。 2 书写规范 2.1 外文翻译的正文格式 正文版心设置为:上边距:3.5厘米,下边距:2.5厘米,左边距:3.5厘米,右边距:2厘米,页眉:2.5厘米,页脚:2厘米。 中文部分正文选用模板中的样式所定义的“正文”,每段落首行缩进2字;或者手动设置成每段落首行缩进2字,字体:宋体,字号:小四,行距:多倍行距1.3,间距:前段、后段均为0行。 这部分工作模板中已经自动设置为缺省值。 2.2标题格式 特别注意:各级标题的具体形式可参照外文原文确定。 1.第一级标题(如:第1章绪论)选用模板中的样式所定义的“标题1”,居左;或者手动设置成字体:黑体,居左,字号:三号,1.5倍行距,段后11磅,段前为11磅。 2.第二级标题(如:1.2 摘要与关键词)选用模板中的样式所定义的“标题2”,居左;或者手动设置成字体:黑体,居左,字号:四号,1.5倍行距,段后为0,段前0.5行。 3.第三级标题(如:1.2.1 摘要)选用模板中的样式所定义的“标题3”,居左;或者手动设置成字体:黑体,居左,字号:小四,1.5倍行距,段后为0,段前0.5行。 标题和后面文字之间空一格(半角)。 3 图表及公式等的格式说明 图表、公式、参考文献等的格式详见《吉林化工学院本科学生毕业设计说明书(论文)撰写规范及标准模版》中相关的说明。

XX英语文学论文开题报告范文

XX英语文学论文开题报告范文题目 an analysis of the character portia in the merchant of venice 一、本课题的研究目的及意义 (一)研究目的 莎士比亚作为英国文艺复兴时期最杰出的艺术大师,被马克思称之为“最伟大的戏剧天才”。透过似真似幻的舞台和匠心独具的故事,莎翁塑造了一系列不朽的人物典型。尤其是塑造了众多而鲜明的人物形象。在莎士比亚的剧作中出场的女性人物有一百多人,在众多的女性人物中上至贵族,下至平民百姓,几乎是各不相同。而《威尼斯商人》中的鲍西亚更是被公认为莎士比亚笔下别具风采的女性形象。众多评论家认为莎士比亚戏剧中刻画的女性形象大都非常贴近生活,具有巨大的认识价值。。在这一讽刺喜剧《威尼斯商人》中鲍西亚美丽、善良、机智、自信、富有才华和胆识,正体现了莎士比亚从男性的视觉自发塑造的理想中的新女性。作为新女性的鲍西亚,具有一定的判逆性格,不甘于被命运摆弄做逆来顺受的“家庭天使”,在一定程度上体现了莎士比亚对人文主义精神的追求。然而,从女性主义的视角来分析,在男性为中心的社会里,鲍西亚绝非真正具有女性的自我意识,而是甘于向父权社会妥协的不完美的新女性。本课题通过对《威尼斯商人》中鲍西亚形象的分析,让读者

了解鲍西亚思想上、性格上的先进性与局限性,对现代女性起到一定的启示作用。 (二)研究意义 莎士比亚通过对生活细致入微的观察,对人性深刻的剖析,创作出《威尼斯商人》这部极具讽刺性的喜剧。在莎士比亚的笔下,女性的感情与理智平分秋色,女性是以与男性平等的形象出现的。这在鲍西亚这一角色身上表现最为突出。鲍西亚美丽温柔、忠贞不渝、善良可爱、机智勇敢、足智多谋。她掌握着自己的命运,不仅在自主选择丈夫方面,而且在与夏洛克的斗争中起到了关键性的作用。在当今的现实生活中,鲍西亚光彩照人的女性形象也可以带给人们启迪和借鉴。鲍西亚在金钱和爱情的杠杆上,选择了爱情。在她的内心深处爱情价更高,是金钱、物质所无法取代的。她对于爱情忠贞不渝和执着,值得现代生活中个别只追求物质享受的女人去学习。在现实生活中,个别人不应该由于自己的优越条件而歧视别人,更要学会不用有色眼光去看待别人。在法庭上,讲义气、才智非凡的鲍西亚女扮男装以法律博士的身份出场,使剧情有了戏剧性的转折,使夏洛克一步步在不知不觉中陷入她的计策。她成功的妙计足以显示出其学问深厚,机智敏锐,有胆有识的特点,这种女性形象也是我们所认同和赞赏的。《威尼斯商人》中的鲍西亚人物形象具有生动鲜明,栩栩如生,有血有肉等特点。本文通过对《威尼斯商人》

毕业论文外文翻译模板

农村社会养老保险的现状、问题与对策研究社会保障对国家安定和经济发展具有重要作用,“城乡二元经济”现象日益凸现,农村社会保障问题客观上成为社会保障体系中极为重要的部分。建立和完善农村社会保障制度关系到农村乃至整个社会的经济发展,并且对我国和谐社会的构建至关重要。我国农村社会保障制度尚不完善,因此有必要加强对农村独立社会保障制度的构建,尤其对农村养老制度的改革,建立健全我国社会保障体系。从户籍制度上看,我国居民养老问题可分为城市居民养老和农村居民养老两部分。对于城市居民我国政府已有比较充足的政策与资金投人,使他们在物质和精神方面都能得到较好地照顾,基本实现了社会化养老。而农村居民的养老问题却日益突出,成为摆在我国政府面前的一个紧迫而又棘手的问题。 一、我国农村社会养老保险的现状 关于农村养老,许多地区还没有建立农村社会养老体系,已建立的地区也存在很多缺陷,运行中出现了很多问题,所以完善农村社会养老保险体系的必要性与紧迫性日益体现出来。 (一)人口老龄化加快 随着城市化步伐的加快和农村劳动力的输出,越来越多的农村青壮年人口进入城市,年龄结构出现“两头大,中间小”的局面。中国农村进入老龄社会的步伐日渐加快。第五次人口普查显示:中国65岁以上的人中农村为5938万,占老龄总人口的67.4%.在这种严峻的现实面前,农村社会养老保险的徘徊显得极其不协调。 (二)农村社会养老保险覆盖面太小 中国拥有世界上数量最多的老年人口,且大多在农村。据统计,未纳入社会保障的农村人口还很多,截止2000年底,全国7400多万农村居民参加了保险,占全部农村居民的11.18%,占成年农村居民的11.59%.另外,据国家统计局统计,我国进城务工者已从改革开放之初的不到200万人增加到2003年的1.14亿人。而基本方案中没有体现出对留在农村的农民和进城务工的农民给予区别对待。进城务工的农民既没被纳入到农村养老保险体系中,也没被纳入到城市养老保险体系中,处于法律保护的空白地带。所以很有必要考虑这个特殊群体的养老保险问题。

文献综述和外文翻译撰写要求与格式规范

本科毕业论文(设计)文献综述和外文翻译 撰写要求与格式规范 一、毕业论文(设计)文献综述 (一)毕业论文(设计)文献综述的内容要求 1.封面:由学院统一设计,普通A4纸打印即可。 2.正文 综述正文部分需要阐述所选课题在相应学科领域中的发展进程和研究方向,特别是近年来的发展趋势和最新成果。通过与中外研究成果的比较和评论,说明自己的选题是符合当前的研究方向并有所进展,或采用了当前的最新技术并有所改进,目的是使读者进一步了解本课题的意义。文中的用语、图纸、表格、插图应规范、准确,量和单位的使用必须符合国家标准规定,引用他人资料要有标注。 文献综述字数在5000字以上。 正文前须附500字左右中文摘要,末尾须附参考文献。 参考文献的著录按在文献综述中出现的先后顺序编号。 期刊类文献书写方法:[序号]作者(不超过3人,多者用等表示).题(篇)名[J].刊名,出版年,卷次(期次):起止页次.

图书类文献书写方法:[序号]作者.书名[M].版本.出版地:出版者,出版年:起止页次. 论文集类文献书写方法:[序号]作者.篇名[C].论文集名.出版地:出版者,出版年:起止页次. 学位论文类书写方法:[序号]作者.篇名[D].出版地:单位名称,年份. 电子文献类书写方法:[序号]主要责任者. 题名:其他题名信息[文献类型标志/文献载体标志 ]出版地:出版者,出版年(更新或修改日期)[引用日期].获取和访问途径. 参考文献篇数应符合学院毕业论文(设计)工作的要求。 (二)毕业论文(设计)文献综述撰写与装订的格式规范 第一部分:封面 1.封面:由学院统一设计,“本科生毕业论文(设计)”根据作业实际明确为“论文”或“设计”,其它文本、表格遇此类情况同样处理。 第二部分:文献综述主题 1.中文摘要与关键词 摘要标题(五号,宋体,顶格,加粗)

英语文体学教程

Chapter1 1, what is style in your opinion according to what we have studied in this chapter? Anwser1 , from the perspective of the content, the events and activities described ,style is saying different things in different ways ;from the perspective of the ways of expression used ,styled is same thing in different ways; from the perspective of the users of language ,style is different speakers using language in different ways; and from the perspective of the text ,style is the functions of texts for different purposes. Anwser2, the definition of style is the concept of style as choice .this definition can have at least too interpretations .one is that first we have a pre-existing thought ,and then we choice the appropriate type of expression to express it in language. The chosen expression is the style .another is that the choice refers to the choice of meaning. The choice of language is at the same time a choice of meaning and a choice of style . 2,what is the significance of studying the style of language in learning and teaching English? Anwser, the answer is that if we want to use language appropriately in different situations , we need to study style .as foreign language learners, if we disregard the rules of using what variety of language in what occasion , or fail to obey them through ignorance , language can become instead a barrier to successful communication . Therefore its necessary to have a clear awareness of how language should be used in different types of situations especially in unfamiliar situations. 3, what factors can result in differences in style ? Answer , 1, the different types of vocabulary create different images of the events in the rea der’s mind, so they can result in different styles.2,people living in different periods of time in history will also speak differently ,and that will result in a different style. Chapter2 1, explain the following terms 1),foregrounding: the stylistically significant features have to be prominent and motivated ,that is ,foregrounded. 2),incongruity: the linguistic features depart from the normal use of language ,breaking the rules grammar ,spelling ,pronunciation. 3)deflection : the linguistic features don’t depart from the established grammatical, lexical and logical rules and principles ,but have an unexpected high frequency of occurrence. 4),field; its concerned with what is happening ,including the subject matter,the events happenings,going-ons, the content ,etc 5)tenor: its concerned with who is taking part in the exchange of meaning ----the relationship between the speaker and the listener ,their relative status,their attitude,and their role relations . 6)mode: its concerned with how the interaction is conducted ,that is whether it is written or spoken ,or whether it is expressed by phonic substance or graphic substance. 2,question for discussion 2)in rhetorical series,the number of items can influence the stylistic effect.try to analyze the causes on the basis of social culture. Answer :different numbers of words can produce different stylistic effects in the appropriate contexts. Two items express assertion ,that is ,it is just this ,not that .In appropriate situations three items can produce ethic ,persuasive, and representative effect. Four or more items in a series

Bartleby英国文学期末论文

Interpretation of “Bartleby” 2012 English Class, 1204402019, Crush Abstract Herman Melville?s tale “Bartleby”is one of those highly acclaimed symbolic short stories in the 19th century. Bartleby is an exploited worker in the capitalistic prison—Wall Street. To some critics, he is “a Thoreau-like practitioner of passive resistance”or “an autobiographical projection of Melville as alienated author.”1In this article, I am going to concentrate on the dark, ruthless commercial society and its defective capitalist values the narrator wants to reveal in “Bartleby”; specifically, I will illustrate how the narrator?s failure to understand the existence of Bartleby and to help him indicates the limitations of rationalism. Further more, I will also try to explain what does Bartleby really need, and how can people really save him from terrible forlornness. Key words Bartleby society limitation rationalism capitalist values Melville?s “Bartleby”is narrated by the first-person narrator, as he describes himself, is “a man who, from his youth upwards, has been filled with a profound conviction that the easiest way of life is the best…one of those unambitious lawyers who never addresses a jury, or in any way draws down public applause; but in the cool tranquility of a snug retreat, do a snug business among rich men?s bonds and mortgages and title-deeds.” He is quite satisfied with his profitable life. He is proud of himself in his successful business and proudly attached that he was once employed and praised by John Jacob Astor: “All who know me consider me an eminently safe man. The late John Jacob Astor, a personage little given to poetic enthusiasm, had no hesitation in pronouncing my first grand point to be prudence; my next method.”The narrator is a typical business man of Wall Street—the epitome of the increasing urbanized, capital-driven society. The author does not set Wall Street as the backdrop randomly, but uses it 1(journal articles) Y on-jae Jung, “The Poe-esque Elements in Melville?s…Bartleby the Scrivener?”, Foreign Literature Studies 4 (2009), p. 63.

毕业论文 外文翻译#(精选.)

毕业论文(设计)外文翻译 题目:中国上市公司偏好股权融资:非制度性因素 系部名称:经济管理系专业班级:会计082班 学生姓名:任民学号: 200880444228 指导教师:冯银波教师职称:讲师 年月日

译文: 中国上市公司偏好股权融资:非制度性因素 国际商业管理杂志 2009.10 摘要:本文把重点集中于中国上市公司的融资活动,运用西方融资理论,从非制度性因素方面,如融资成本、企业资产类型和质量、盈利能力、行业因素、股权结构因素、财务管理水平和社会文化,分析了中国上市公司倾向于股权融资的原因,并得出结论,股权融资偏好是上市公司根据中国融资环境的一种合理的选择。最后,针对公司的股权融资偏好提出了一些简明的建议。 关键词:股权融资,非制度性因素,融资成本 一、前言 中国上市公司偏好于股权融资,根据中国证券报的数据显示,1997年上市公司在资本市场的融资金额为95.87亿美元,其中股票融资的比例是72.5%,,在1998年和1999年比例分别为72.6%和72.3%,另一方面,债券融资的比例分别是17.8%,24.9%和25.1%。在这三年,股票融资的比例,在比中国发达的资本市场中却在下跌。以美国为例,当美国企业需要的资金在资本市场上,于股权融资相比他们宁愿选择债券融资。统计数据显示,从1970年到1985年,美日企业债券融资占了境外融资的91.7%,比股权融资高很多。阎达五等发现,大约中国3/4的上市公司偏好于股权融资。许多研究的学者认为,上市公司按以下顺序进行外部融资:第一个是股票基金,第二个是可转换债券,三是短期债务,最后一个是长期负债。许多研究人员通常分析我国上市公司偏好股权是由于我们国家的经济改革所带来的制度性因素。他们认为,上市公司的融资活动违背了西方古典融资理论只是因为那些制度性原因。例如,优序融资理论认为,当企业需要资金时,他们首先应该转向内部资金(折旧和留存收益),然后再进行债权融资,最后的选择是股票融资。在这篇文章中,笔者认为,这是因为具体的金融环境激活了企业的这种偏好,并结合了非制度性因素和西方金融理论,尝试解释股权融资偏好的原因。

毕业论文外文翻译模版

长江大学工程技术学院 毕业设计(论文)外文翻译 外 文 题 目 Matlab Based Interactive Simulation Program for 2D Multisegment Mechanical Systems 译 文 题 目 二维多段机械系统基于Matlab 的 交互式仿真程序 系 部 化学工程系 专 业 班 级 化工60801 学 生 姓 名 李泽辉 指 导 教 师 张 铭 辅 导 教 师 张 铭 完 成 日 期 2012.4.15 顶层配置在管路等,要求设备,所有设要求,对调整使案,编是指机确保机组中资料试

外文翻译 二维多段机械系统基于Matlab 的交互式仿真程序 Henryk Josiński, Adam ?witoński, Karol J?drasiak 著;李泽辉 译 摘要:本文介绍了多段机械系统设计原则,代表的是一个模型的一部分的设计系统,然后扩展 形成的几个部分和模型算法的分类与整合的过程,以及简化步骤的过程叫多段系统。本文还介绍了设计过程的二维多段机械系统的数字模型,和使用Matlab 的软件包来实现仿真。本文还讨论测试运行了一个实验,以及几种算法的计算,实现了每个单一步骤的整合。 1 简介 科学家创造了物理模型和数学模型来表示人类在运动中的各种形式。数学模型 使创建数字模型和进行计算机仿真成为可能。模型试验,可以使人们不必真正的实 验就可以虚拟的进行力和力矩的分解。 本文研究的目的是建立一个简单的多段运动模型,以增加模型的连续性和如何 避免不连续为原则。这是创建一个人类运动模型系统的冰山一角。其使用matlab 程 序包创建的数字模型,可以仿真人类运动。 文献中关于这一主题的内容很广泛。运动的模式和力矩的分解在这些文献中都 有涉猎。动态的平面人体运动模型,提出了解决了迭代矩阵的方法。还值得一提的 是这类项目的参考书目,布鲁贝克等人提出了一个模型——人腿模型,这个以人的 物理运动为基础的平面模型仿真了人腿——一个单一的扭簧和冲击碰撞模型。人腿 模型虽然简单,但是它展示人类的步态在水平地面上的运动特征。布鲁贝克等人还 介绍,在人腿模型的双足行走的基础上,从生物力学的角度而言,符合人体步行的 特征。这个模型具有一个躯干,双腿膝盖和脚踝。它能够合理的表现出人多样的步 态风格。一个仿真人类运动的数学模型反应出了人的部分运动状态。 图1. 力的分解 2 力的分解

本科毕业设计(论文)外文翻译基本规范

本科毕业设计(论文)外文翻译基本规范 一、要求 1、与毕业论文分开单独成文。 2、两篇文献。 二、基本格式 1、文献应以英、美等国家公开发表的文献为主(Journals from English speaking countries)。 2、毕业论文翻译是相对独立的,其中应该包括题目、作者(可以不翻译)、译文的出处(杂志的名称)(5号宋体、写在文稿左上角)、关键词、摘要、前言、正文、总结等几个部分。 3、文献翻译的字体、字号、序号等应与毕业论文格式要求完全一致。 4、文中所有的图表、致谢及参考文献均可以略去,但在文献翻译的末页标注:图表、致谢及参考文献已略去(见原文)。(空一行,字体同正文) 5、原文中出现的专用名词及人名、地名、参考文献可不翻译,并同原文一样在正文中标明出处。 二、毕业论文(设计)外文翻译 (一)毕业论文(设计)外文翻译的内容要求 外文翻译内容必须与所选课题相关,外文原文不少于6000个印刷符号。译文末尾要用外文注明外文原文出处。 原文出处:期刊类文献书写方法:[序号]作者(不超过3人,多者用等或et al表示).题(篇)名[J].刊名(版本),出版年,卷次(期次):起止页次. 原文出处:图书类文献书写方法:[序号]作者.书名[M].版本.出版地:出版者,出版年.起止页次. 原文出处:论文集类文献书写方法:[序号]作者.篇名[A].编著者.论文集名[C]. 出版地:出版者,出版年.起止页次。 要求有外文原文复印件。 (二)毕业论文(设计)外文翻译的撰写与装订的格式规范 第一部分:封面

1.封面格式:见“毕业论文(设计)外文翻译封面”。普通A4纸打印即可。 第二部分:外文翻译主题 1.标题 一级标题,三号字,宋体,顶格,加粗 二级标题,四号字,宋体,顶格,加粗 三级标题,小四号字,宋体,顶格,加粗 2.正文 小四号字,宋体。 第三部分:版面要求 论文开本大小:210mm×297mm(A4纸) 版芯要求:左边距:25mm,右边距:25mm,上边距:30mm,下边距:25mm,页眉边距:23mm,页脚边 距:18mm 字符间距:标准 行距:1.25倍 页眉页角:页眉的奇数页书写—浙江师范大学学士学位论文外文翻译。页眉的偶数页书写—外文翻译 题目。在每页底部居中加页码。(宋体、五号、居中) 装订顺序是:封皮、中文翻译、英文原文复印件。

研究论文:英语文体学知识在大学英语教学中的应用

88152 学科教育论文 英语文体学知识在大学英语教学中的应 用 中图分类号:H319 文献标识码:A 文章编号:1672-1578(2016)06-0009-02 1 引言 长期以来,英语文体学是大学英语专业学生的一门专业课,非英语专业的学生对英语文体学理论及问题分析方法则比较陌生。在英语学习中学生往往因缺乏识别不同英语文体能力而造成语域误用。在大学英语授课过程中教师往往感到,学生在掌握了语法和常用词汇,有了基本的听说读写能力之后,对于文体风格的辨别则成了一个重要的问题,他们往往不注意在不同场合应使用不同语域的语言。如写论述文时使用十分口语化的句式,而翻译正式文体时用词又过于通俗等,这是在我国高校大学生英语学习过程中普遍存在的现象。因此,在大学英语教学中,教师要有意识地引导学生了解、学习、掌握各类文体的不同特

点,从而提高学生的文体意识,学会正确使用英语,提高学生的英语综合应用能力及文学鉴赏力。 2 文体学理论 文体学(stylistics)是一门运用现代语言学理论和方法研究文体,研究语言表达方式和表达效果的学科。Style(文体)指某种语体的风格特征,即适用于某特定语言环境的一整套语言变异形式。文体学(stylistics)是指“对(style)变异的研究,语言风格变异取决于语言使用的场合,也取决于作者或说话者希望能对读者或听者作成的影响”。[1]随着语言学研究的开展,文体学吸取了传统的风格学与修辞学的某些成分,以语言学的理论和方法为依据,从日常谈话到正式演讲,从诗歌到散文,从新闻、广告到小说、戏剧,进行系统的分析研究,探讨语言风格上的特点,并寻求其规律。 文体学在大学英语教学中的运用主要体现在文体分析上。英语文体分析主要采用比较语言学的方法,通过对语音、词汇、语法、句法及语篇结构等的文体及社会功能、英语的变异现象和各种变体的描述与分析,帮助学生初步掌握各种描述分析语言的方法,以及了解语言在特定环境中的文体特征、社会功能,同时要通过作品的描述和分

英国文学论文提纲

班级: 2005级8班;姓名:杜江娟;学号: 200505140803 One’s Sacrifice in His or Her Society --After reading The Mill on the Floss Outline Thesis statement: This paper is based on George Eliot’the Mill on the Floss. In the novel there are conflicts among individuals as well as individual and society. Then this paper reveals one’s sacrifice in face of conflicts and the relation between one’s own will and the outside’s bondage upon him or her. At last the conclusion that only mutual understanding and cooperation can solve the problems is drew. I. Introduction. II. The influence of society upon individuals and their responses to the outside A.Man’s and woman’s different responsibilities in 19th century illustrated with members in Maggie’s large family B.The influence of one’s social background on his or her growth 1.Maggie’s sacrifice as a woman during her growth in 19th century 2.Tom’s loss at different time of his growth 3.Philip’s deficiency and his family background 4.Lucy’s merits in Victorian England C.Different characters’ response in the face of various situations 1.Maggie’s fight against discrimination 2.Tom’s reactions to responsibility given by family 3.Philip’s compromise as a gentleman 4.Lucy’s standard behavior as a lady III. Analysis of the conflicts showed by main character A. The conflicts displayed by Maggie 1. The conflict in Maggie’s inner world 2. The conflict between Maggie and the outside world

相关主题
文本预览
相关文档 最新文档