昆明理工大学2020年《813运筹学》考研专业课真题试卷

昆明理工大学2012年硕士研究生招生入学考试试题(A卷)考试科目代码：817 考试科目名称：C程序设计试题适用招生专业：085211 计算机技术、085212 软件工程考生答题须知1．所有题目（包括填空、选择、图表等类型题目）答题答案必须做在考点发给的答题纸上，做在本试题册上无效。

请考生务必在答题纸上写清题号。

2．评卷时不评阅本试题册，答题如有做在本试题册上而影响成绩的，后果由考生自己负责。

3．答题时一律使用蓝、黑色墨水笔或圆珠笔作答（画图可用铅笔），用其它笔答题不给分。

4．答题时不准使用涂改液等具有明显标记的涂改用品。

昆明理工大学2013年硕士研究生招生入学考试试题(A卷)考试科目代码：817 考试科目名称：计算机学科专业基础综合考生答题须知5．所有题目（包括填空、选择、图表等类型题目）答题答案必须做在考点发给的答题纸上，做在本试题册上无效。

请考生务必在答题纸上写清题号。

6．评卷时不评阅本试题册，答题如有做在本试题册上而影响成绩的，后果由考生自己负责。

7．答题时一律使用蓝、黑色墨水笔或圆珠笔作答（画图可用铅笔），用其它笔答题不给分。

8．答题时不准使用涂改液等具有明显标记的涂改用品。

2)用类算法语言及图示描述实现铺设总费用最小的方案的Kruskal算法（14分）（要求：图示要画出算法所涉及的存储结构及其初始化情况）计算机网络部分一、单项选择题（第1小题0.5，其它每小题2分，总分22.5分）1、按照网络覆盖范围可把计算机网络分类为（）A.广播式网络、点对点式网络B.存储转发网络、电路交换网络B.公众网、专用网 D.局域网、城域网和广域网2、在OSI参考模型中，数据链路层的协议数据单元是( )。

A.DataB.SegmentC. packetD.frame3、在全双工通讯的传输中，两个连接实体之间（）。

A. 同时进行双向比特流的传输B. 交替进行双向比特流的传输C. 只能进行单向的传输D. 以上答案都不正确4、将模拟信号转换为数字信号的过程叫做（）。

昆明理工大学2020年硕士研究生招生入学考试试题(A卷) 考试科目代码：811 考试科目名称：机械原理
考生答题须知
1．所有题目（包括填空、选择、图表等类型题目）答题答案必须做在考点发给的答题纸上，做在本试题册上无效。

请考生务必在答题纸上写清题号。

2．评卷时不评阅本试题册，答题如有做在本试题册上而影响成绩的，后果由考生自己负责。

3．答题时一律使用蓝、黑色墨水笔或圆珠笔作答（画图可用铅笔），用其它笔答题不给分。

4．答题时不准使用涂改液等具有明显标记的涂改用品。

昆明理工大学2020年硕士研究生招生入学考试试题(A 卷)考试科目代码： 811 考试科目名称 ： 机械原理考生答题须知1　所有题目（包括填空、选择、图表等类型题目）答题答案必须做在考点发给的答题纸上，做在本试题册上无效。

请考生务必在答题纸上写清题号。

2　评卷时不评阅本试题册，答题如有做在本试题册上而影响成绩的，后果由考生自己负责。

3　答题时一律使用蓝、黑色墨水笔或圆珠笔作答（画图可用铅笔），用其它笔答题不给分。

4　答题时不准使用涂改液等具有明显标记的涂改用品。

一、选择填空题（共24分，每题2分）1. 构件通过运动副的连接构成的可相对运动的系统称之为 。

A. 机器B. 机构C. 运动链2. 某一正常齿制的标准直齿圆柱内齿轮，实测得其齿根圆直径，齿数67.5f d mm =，则其齿顶圆直径= 。

25z =a d mm A. 75 B. 81 C. 82.53. 为避免根切，某一齿轮采用正变位加工，与标准齿轮相比较，其齿根高 。

A. 增加了B. 不变C. 减少了xm xm 4.某一生产线机组由若干机器并联构成，若其单机效率各不相同，其最高、最低效率分别为、，则机组的效率为 。

max ηmin ηηA. B. C.min ηη≤max min ηηη≤≤max min ηηη<<5. 滑块与机架形成移动副，其发生自锁的条件为：作用于滑块上的驱动力作用在其 之内。

A. 摩擦圆B. 压力角C. 摩擦角6. 以下凸轮机构从动件常用运动规律中，可用于高速凸轮机构的为 。

A. 等加速等减速运动B. 等速运动C. 五次多项式运动7. 在直动滚子从动件盘形凸轮设计中，假设理论轮廓线外凸部分的最小曲率半径用表示，滚子半径用表示，为凸轮的基圆半径。

则当min ρT r 0r ，凸轮实际轮廓将出现尖点。

A. B. C. T r <min ρT r =min ρ0min r <ρ8. 机械系统的等效动力学模型中，各等效量与构件的 有关。

昆明理工大学2020年硕士研究生招生入学考试试题(A卷)考试科目代码：811 考试科目名称：机械原理考生答题须知1．所有题目（包括填空、选择、图表等类型题目）答题答案必须做在考点发给的答题纸上，做在本试题册上无效。

请考生务必在答题纸上写清题号。

2．评卷时不评阅本试题册，答题如有做在本试题册上而影响成绩的，后果由考生自己负责。

3．答题时一律使用蓝、黑色墨水笔或圆珠笔作答（画图可用铅笔），用其它笔答题不给分。

4．答题时不准使用涂改液等具有明显标记的涂改用品。

(a) (b)四、（18分）有一铰链四杆机构，已知三个杆的长度尺寸：L BC = 50 mm，L CD =35 mm，L AD =30 mm。

杆AD为固定件。

杆AB的长度L AB未定，试根据下述条件计算确定杆AB的长度：(1) 如果能成为曲柄摇杆机构，且AB是曲柄，求L AB的取值范围；(2) 如果能成为双曲柄机构，求L AB的取值范围；(3) 如果能成为双摇杆机构，求L AB的取值范围。

五、（20分）图示轮系中，已知各齿轮齿数分别为z1=18、z'1=24、z2=23、z3=22、z'3=24、z4=60、z'4=80、z5=28及ω1=120 rad/s。

试求：(1)分析此轮系分别由什么轮系所组成；(2)该轮系传动比i1H；(3)行星轮的角速度ω5。

四、题图三、题图六、（18分）图示齿轮-连杆组合机构。

已知机构位置和各部分尺寸，1ω逆时针转动。

在图中标出速度瞬心p12、p23、p34、p45、p14、p15、p13和p35的位置，根据速度瞬心法写出3ω的计算表达式。

七、（8分）如图所示机构，摩擦圆半径ρ、摩擦角ϕ均为已知，M1为驱动力矩，Q为阻力。

六、题图五、题图在图上画出各构件的总反力方向和作用线。

八、（10分）图示为某机组在一个稳定运转循环内等效驱动力矩M d和等效阻力矩M r的变化曲线，并已在图中给出它们之间包围面积所表示的盈亏功W，单位焦耳。

昆明理工大学2018年硕士研究生招生入学考试试题(A 卷)
考试科目代码：813 考试科目名称 ： 运筹学
考生答题须知
1． 所有题目（包括填空、选择、图表等类型题目）答题答案必须做在考点发给的答题纸上，做在本试题册上无效。

请考生务必在答题纸上写清题号。

2． 评卷时不评阅本试题册，答题如有做在本试题册上而影响成绩的，后果由考生自己负责。

3． 答题时一律使用蓝、黑色墨水笔或圆珠笔作答（画图可用铅笔），用其它笔答题不给分。

4． 答题时不准使用涂改液等具有明显标记的涂改用品。

)1,,n 是原问题的可行解，)1,,m 是其对偶问题
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m 为其对偶问题的最优解。

、目标规划的目标函数由各目标约束的 及相应的优先因子和 构成。

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昆明理工大学2018年硕士研究生招生入学考试试题。

2020年云南昆明理工大学单考英语考研真题A卷Part I Vocabulary and Structure (20 points, 1 point each)Direction: In this part, there are 20 incomplete sentences. You are required to complete each one by deciding on the most appropriate word or words from the 4 choices marked A, B, C and D. Then you should mark the corresponding letter on the Answer Sheet with a single line through the center.1.You ______________ park here! It’s an emergency exit.A.wouldn’tB. needn’tC. couldn’tD. mustn’t2.The dictionary is what I want, but I don’t have enough money______________ me.A.byB. forC. inD. with3.He had lost his temper and his health in the war and never found______________ of them again.A.neitherB. eitherC. eachD. all4.The book has been translated into thirty languages since it ____________ on the market in 1073.A.had comeB. has comeC. cameD. comes5.To improve the quality of our products, we asked for suggestions ______________ had used the products.A.whoeverB. whoC. whicheverD. which6.This restaurant has become popular for its wide ______________ of foods that suit all tastes and pockets.A.divisionB. areaC. rangeD. circle7.After the earthquake, the first thing the local government did was to provide______________ for the homeless families.A.accommodationB. occupationC. equipmentD. furniture8.In this lecture, I can only give you a purely ______________ view of how we can live life to the full and make some suggestions about the future.A.privateB. personalC. uniqueD. different9.Mistakes don’t just happen; they occur for a reason. Find out the reason, and then making the mistake becomes ______________.A.favourableB. preciousC. essentialD. worthwhile10.If I find someone who looks like the suspect, my ______________ reaction will be to tell the police.A.physicalB. immediateC. sensitiveD. sudden11.Niagara Falls is a great tourist ______________, drawing millions of visitors every year.A.attentionB. attractionC. appointmentD. arrangement12.The hopes, goals, fears and desires ______________ widely between men and women, between the rich and the poor.alter B. shift C. transfer D. vary13.It is our ______________ policy that we will achieve unity through peaceful means.A.consistentB. continuousC. considerateD. continua14.Between 1974 and 1997, the number of overseas visitors expanded ______________ 27%.A.byB. forC. toD. in15.He is ______________ about his chances of winning a gold medal in the Olympics next year.A.outstandingB. optionalC. optimisticD. obvious16.His writing is so ______________ that we can't clarify his ideas in first reading.A.obscureB. objectiveC. obligingD. obstacle17.He gave his ______________ for new marketing procedures.A.representationsB. presentationsC. commentsD. memoranda18.I hope you ______________ all the material before you make the final decision.A.will have readB. will readC.will be readingD. would have read19.Hello! You ______________ be the assistant. I’m Mr. Munroe.A.ought toB. shouldC. couldD. must20.You have no right ____________________ to read what is written inside.A.indeedB. actuallyC. whatsoeverD. anyhowPart II Cloze (10 points, 1 point each)Directions: There are 10 blanks in the following passage. For each blank, there are four choices marked A, B, C and D. Choose the ONE that best fits into the passage. Then mark the corresponding letter on the Answer Sheet with a single line through the center.Most people give little thought to the pens they write with, especially since the printers in modern homes and offices mean that very 21 things are handwritten. All too often, people buy a pen based only on 22 , and wonder why they are not satisfied 23 they begin to use it. However, buying a pen that you’ll enjoy is not 24 if you keep the following in mind.First of all, a pen should fit comfortably in your hand and be 25 to use. The thickness of the pen is the most important characteristic 26 comfort. Having a small hand and thick fingers, you may be comfortable with a thin pen. If you have a 27 hand and thicker fingers, you may 28 a fatter pen. The length of a pen can 29 influence comfort. A pen that is too 30 can easily feel top-heavy and unstable.21.A. many B. few C. pleasant D. important22.A. looks B. reason C. value D. advantages23.A. once B. if C. because D. though24.A. convenient B. practical C. strange D. difficult25.A. heavy B. easy C. hard D. safe26.A. taking B. finding C. determining D. seeking27.A. stronger B. weaker C. smaller D. larger28.A. prefer B. recommend C. prepare D. demand29.A. hardly B. also C. never D. still30.A. thick B. light C. long D. softPart III Reading Comprehension (30 points, 2 points each)Directions: In this part there are 3 passages. Each passage is followed by 5 questions or unfinished sentences. For each of them there are 4 choices marked A, B, C and D. Choose the best answer and mark your choice on the Answer Sheet with a single line through the center.Passage 1Questions 31 to 35 are based on the following passage.An increase in students applying to study economics at university is being attributed to the global economic crisis awakening a public thirst for knowledge about how the financial system works.Applications for degree courses beginning this autumn were up by 15% this January, according to UCAS, the Universities and Colleges Admissions Service. A spokesman for the Royal Economic Society said applications to do economics at A-level were also up.Professor John Beath, the president of the society and a leading lecturer at St. Andrews University, said his first-year lectures—which are open to students from all departments—were drawing crowds of 400, rather than the usual 250. “There are a larger number of students who are not economics majors, who would like to learn something about it. One of the things I have done this year is to relate my teaching to contemporary events in a way that one hasn‘t traditionally done,” he added.University applications rose 7% last year, but there were rises above average in several subjects. Nursing saw a 15% jump, with people’s renewed interest in careers in the public sector, which are seen as more secure in economic crisis.A recent study showed almost two thirds of parents believed schools should do more to teach pupils about financial matters, and almost half said their children had asked them what was going on, although a minority of parents felt they did not understand it themselves well enough to explain.Zack Hocking, the head of Child Trust Funds, said, “It’s possible that one good thing to arise from the downturn will be a generation that’s financially wiser and better equipped to manage their money through times of economic uncertainty.31.Professor John Beath’s lectures are ______________.A.given in a traditional wayB. connected with the present situationC.open to both students and their parentsD. warmly received by economists32.Careers in the public sector are more attractive because of their ______________.A.greater stabilityB. higher payC. fewer applicationsD. better reputation33.In the opinion of most parents, ______________.A.economics should be the focus of school teachingB.more students should be admitted to universitiesC.the teaching of financial matters should be strengthenedD.children should solve financial problems themselves34.According to Hocking, the global economic crisis might make the youngsters ______________.A.wiser in money managementB. have access to better equipmentC.confident about their future careersD. get jobs in Child Trust Funds35.What’s the main idea of the text?A.Universities have received more applications.B.Economics is attracting an increasing number of students.C.College students benefit a lot from economic uncertainty.D.Parents are concerned with children’s subject selection.Passage 2Questions 36 to 40 are based on the following passage.Food sometimes gets poisoned with harmful things. A person who eats such food can get an illness called food poisoning. Food poisoning is usually not serious, but some types are deadly. The symptoms of food poisoning usually begin within hours of eating the poisoned food. Fever is one of the most common symptoms.Certain microorganisms cause most types of food poisoning. Bacteria and other microorganisms can poison eggs, meat, vegetables, and many other foods. After entering the body, these tiny living things release poisons that make people sick. Some chemicals can also cause food poisoning. They are often added to food while it is being grown, processed, or prepared. For example, many farmers spray chemicals on crops to kill weeds and insects. Some people may have bad reaction to those chemicals when they eat the crops.Some plants and animals contain natural poisons that are harmful to people. These include certain kinds of seafood, grains, nuts, seeds, beans, and mushrooms. When people handle food properly, the risk of food poisoning is very small. Microorganisms multiply rapidly in dirty places and warm temperatures. This means that people should never touch food with dirty hands or put food on unwashed surfaces. Food should be kept in a refrigerator to stop microorganisms from growing. Meat needs to be cooked thoroughly to kill any dangerous microorganisms. People should also wash food covered with chemicals before eating it. Finally, people should not eat wild mushrooms or other foods that grow in the wild. Some of these foods may contain natural materials that are poisonous to humans. In addition, some types of fish ban be poisonous.Most people recover from food poisoning after a few days of resting and drinking extra water. If people eat natural poisons, they must go to the hospital right away to have their stomachs emptied.36.Which of the following statements is NOT true?A.Food when poisoned can make people sick.B.Food poisoning means death.C.Food poisoning comes in varieties.D.Food poisoning can be serious.37.We know from the passage that the symptoms of food poisoning ________________.A.are always accompanied by a feverB.are too common to be notedC.can be noticed within hoursD.can be ignored38.Food poisoning can be caused by all the following EXCEPT ________________.A.some chemicalsB. low temperaturessome tiny living things D. certain natural materials39.From Paragraph 5, we can learn that ________________.A.mushrooms should not be eatenB.vegetables are safer than meat and seafoodC.natural poisons are more dangerous than chemicalsD.different types of food should be handled differently40.It can be inferred from the passage that ________________.A.Natural materials are safe in food processingB.Chemicals are needed in food processingC.Food poisoning can be kept under controlD.Food poisoning is out of controlPassage 3Questions 41 to 45 are based on the following passage.Many a young person tells me he wants to be a writer. I always encourage such people, but I also explain that there's a big difference between “being a writer” and writing. In most cases these individuals are dreaming of wealth and fame, not the long hour alone at a typewriter. “You’ve got to want to write,” I say to them, “not want to be a writer”.The reality is that writing is a lonely, private and poor-paying affair. For every writer kissed by fortune there are thousands more whose longing is never rewarded. When I left a 20-year career in the U.S. Coast Guard to become a freelance writer,I had no prospects at all. What I did have was a friend who found me my room ina New York apartment building. It didn't even matter that it was cold and had no bathroom. I immediately bought a used manual typewriter and felt like a genuine writer.After a year or so, however, I still hadn't gotten a break and began to doubt myself. It was so hard to sell a story that I barely made enough to eat. But I knew I wanted to write, I had dreamed about it for years. I wasn't going to be one of those people who die wondering: What if? I would keep putting my dream to the test even though it meant living with uncertainty and fear of failure. This is the shadowland of hope, and anyone with a dream must learn to live there.41.The passage is meant to ________________.A.warn young people of the hardships that a successful writer has to experienceB.advise young people to give up their idea of becoming a professional writerC.show young people it’s unrealistic for a writer to pursue wealth and fameD.encourage young people to pursue a writing career42.What can be concluded from the passage?A.Genuine writers often find their work interesting and rewarding.B.A writer’s success depends on luck rather than on efforts.C.Famous writers usually live in poverty and isolation.D.The chances for writer to become successful are small43.Why did the author begin to doubt himself after the first year of his writing career?A.He wasn’t able to produce a single book.B.He hadn’t seen anything for the better.C.He wasn’t able to have a rest for a whole year.D.He thought that he lacked imagination.44.“…people who die wondering: What if?”（Line3, Para 3） refers to “those ________________”.A. who think too much of the dark side of lifeB. who regret giving up their career halfwayC. who think a lot without making a decisionD. who are full of imagination even upon death45.“Shadowland” in the last sentence refers to ________________.A. the wonderland one often dreams aboutB. the bright future that one is looking forward toC. the state of uncertainty before one’s final goal is reachedD. a world that exists only in one’s imaginationPart IV Translation (20 points)A.Directions: Translate the following paragraph into Chinese on the Answer Sheet.(10 points)46.In medicine as in law, government, and other lines of work, the requirements of honesty often seem less important because of greater needs: the need to shelter from cruel news or to uphold a promise of secrecy; to expose dishonesty or to promote the public interest. At time, doctors see important reasons to lie for the patient’s own sake; in their eyes, such lies differ sharply from self-serving ones. “Ours is a profession which traditionally has been guided by a rule that exceeds the virtue of uttering the truth for truth’s sake, and that is ‘as far as possible do no harm.’”B.Directions: Translate the following Chinese sentences into English on the Answer Sheet. (10 points, 2 points each))47.虽然不想参加宴会，他还是接受了邀请。

昆明理工大学2020年硕士研究生招生入学考试试题(A卷)
考试科目代码：817 考试科目名称：信号与系统
考生答题须知
1．所有题目（包括填空、选择、图表等类型题目）答题答案必须做在考点发给的答题纸上，做在本试题册上无效。

请考生务必在答题纸上写清题号。

2．评卷时不评阅本试题册，答题如有做在本试题册上而影响成绩的，后果由考生自己负责。

3．答题时一律使用蓝、黑色墨水笔或圆珠笔作答（画图可用铅笔），用其它笔答题不给分。

4．答题时不准使用涂改液等具有明显标记的涂改用品。

C D H 1(s )1+H 1(s )H 2(s )H 2(s )
1+H 1(s )H 2(s )
昆明理工大学2020年硕士研究生招生入学考试试题
昆明理工大学2020年硕士研究生招生入学考试试题
昆明理工大学2020年硕士研究生招生入学考试试题。