Assignment

Assignment: read the following carefully and write a summary of no more than 100 words.

Crime has been a social phenomenon in all cities in all ages. Various authorities have tried all ways and means of curbing crime, among which capital punishment is one of the most effective, especially for murderers.

However, capital punishment has been abolished for the last decade in many countries. Those who support the abolition of the death penalty regard the criminals as “social misfits” and so they need special treatment. They even believe that society should bear sole responsibility. Other supporters believe that we are the creatures of God and therefore we have no authority to end other’s life since everyone is equal and has the right to live.

Nowadays, criminals are glorified in books and by the mass media. They are often honored as heros and that make many teenagers follow suit.

It is an undeniable fact that punishment by death is deterrent to crime. It makes the brutal criminals and murderers think carefully before doing people any harm. Most of the Chinese people support the imposition of the death penalty as they believe the old saying “an eye for an eye and a tooth for a tooth.”The murderers should have the same treatment that they did to others.

Furthermore, the present punishment is not heavy and strict enough.

The prisoners who have been sentenced to life imprisonment may be freed later for “good conduct.”It is very dangerous for the innocent citizens at large for the criminals may commit crimes again if their will power is not strong enough to resist temptation. If so, it will definitely give a hard blow to the peacefulness and harmony of the society.

Therefore, capital punishment is extremely necessary for the sake of the innocent victims.

(286 words)

chapter3-assignment

第三章 线性分组码 习题 1．证明[n ，k ]线性分组码的最大距离为n -k +1。 2．设一个[7，4]码的生成矩阵为 1000111010010100100110 00111 0G ????? ?=?????? （1）求出该码的全部码矢； （2）求出该码的一致校验矩阵； （3）作出该码的标准阵译码表。 3．证明定理3.1.3。 4．一个[8，4]系统码，它的一致校验方程为： c 0=m 1+m 2+m 3c 1=m 0+m 1+m 2c 2=m 0+m 1+m 2c 3=m 0+m 2+m 3 式中，m 0，m 1，m 2，m 3是信息位，c 0，c 1，c 2，c 3是校验位。找出该码的G 和H ,并证明该码的最小距离为4。 5．构造第4题中码的对偶码。 6．设H 1是[n ，k ]线性分组码C 1的校验矩阵，且有奇数最小距离为d 。作一个新的码C 2，它的校 验矩阵为 12000111 1H H ?? ????? ?=???????? M L （1）证明C 2是一个（n +1，k ）分组码； （2）证明C 2中每一码字的重量为偶数； （3）证明C 2码的最小重量为d +1。 7．设C 1是一个有最小距离为d 1的[n 1，k ]线性系统码，生成矩阵为G 1=[P 1I k ]。C 2是一个有最小距离为d 2的[n ，k ]线性系统码，它的生成矩阵G 2=[P 2I k ]。对满足下述一致校验矩阵 212T k n n k T p H I P I ???? ? ?=??????

的[n 1+n 2，k]线性码，证明它有最小距离至少为d 1+d 2。 8．设一个二进制[n ，k ]码C 的G 矩阵不含全零列，将C 的所有码字排成2k ×n 的阵。 证明： （a ）阵中不含有全零列； （b ）阵中的每一列由2k -1个零和2k -1个1组成； （c ）在一特定分量上为0的所有码字构成C 的一个子空间，问该子空间的维数是多少？ 9．令是所有二进制[n ，k ]线性系统码的集合。证明非零二进制n 重V 或者恰巧含于的 ΓΓ(1)()2k n k ??个码中，或者不在的任一码中。 Γ10．证明二进制[23，12，7]Golay 码和三进制的[11，6，5]Golay 码是完备码。 11．若d 是码C 的最小重量，且为偶数，(1)/2t d =????? 。证明有两个重量均为t +1的矢量必在C 码的同一陪集中。 12．求出d =3，至多只有3个校验元的二进制码的码长n ；和d =5，至多只有8个校验元的二进 制码的码长n 。 13．计算二进制[24，12，8]扩张Golay 码的覆盖半径，及[8，4]RM 码的覆盖半径。 14．证明定理3.9.3。 15．构造三个二进制的[10，3，5]LUEP 码，其分离矢量分别为（8，2，2），（7，4，4）， （6，4，4）。写出它们标准形式的G 和系统码形式的G 。 16．证明定理3.10.3。 17．构造一个具有最高码率的k =10，t =2的2-EC/AUED 码。 18．证明定理3.10.6。

solutions for assignment3

Chapter 3 Assignments P13.Consider a reliable data transfer protocol that uses only negative acknowledgments. Suppose the sender sends data infrequently. Would a NAK-only protocol be preferable to a protocol that uses ACKs? Why? Now suppose the sender has a lot of data to send and the end-to-end connection experiences few losses. In this second case, would a NAK-only protocol be preferable to a protocol that uses ACKs? Why? Answer: In a NAK only protocol, the loss of packet x is only detected by the receiver when packet x+1 is received. That is, the receivers receives x-1 and then x+1, only when x+1 is received does the receiver realize that x was missed. If there is a long delay between the transmission of x and the transmission of x+1, then it will be a long time until x can be recovered, under a NAK only protocol. On the other hand, if data is being sent often, then recovery under a NAK-only scheme could happen quickly. Moreover, if errors are infrequent, then NAKs are only occasionally sent (when needed), and ACK are never sent – a significant reduction in feedback in the NAK-only case over the ACK-only case. P23. We have said that an application may choose UDP for a transport protocol because UDP offers finer application control (than TCP) of what data is sent in a segment and when. a. Why does an application have more control of what data is sent in a segment? b. Why does an application have more control on when the segment is sent? Answer: a) Consider sending an application message over a transport protocol. With TCP, the application writes data to the connection send buffer and TCP will grab bytes without necessarily putting a single message in the TCP segment; TCP may put more or less than a singe message in a segment. UDP, on the other hand, encapsulates in a segment whatever the application gives it; so that, if the application gives UDP an application message, this message will be the payload of the UDP segment. Thus, with UDP, an application has more control of what data is sent in a segment. b) With TCP, due to flow control and congestion control, there may be significant delay from the time when an application writes data to its send buffer until when the data is given to the network layer. UDP does not have delays due to flow control and congestion control.

商务交际英语任务(assignment)

商务交际英语（二） Assignment ● You work in the Sales Department of an international company. Manuela Garcia, an important client, is visiting your company for a day. There are some changes to the itinerary you sent her last week. ● Write a letter of 120 - 140 words to Ms Garcia, using the original itinerary and your handwritten notes, informing her of the changes. Proposed itinerary for one-day visit of Manuela Garcia Wednesday 20 October 11.00 John Sallis to meet Ms Garcia at airport 11.30 Arrival at company John Sallis to give Ms Garcia an introductory tour of company 12.30 14.00 ( Carol Snape Tom McAllister Sue Smith Manuela Garcia ) 15.30 Coffee break 16.00 18.00 John Sallis to take Ms Garcia to the airport 19.30 英语老师：周俐 2012年10月17日（第七周） （作业于10月26日前上交给我）

assignment写作浅谈

在百度问答中留学论文宝老师发现，很多学生都会进行网上交流，比如学生会问到，留学论文宝在哪里？留学论文宝好不好？留学论文宝是不是跟网上说的一样好？我是澳洲的学生，某某学科的论文作业能不能辅导？很多这样的问题等到第二天再看的时候发现百度问题已经被接受过留学论文宝老师辅导的学生给刷屏了。感谢各位留学生对留学论文宝的信赖、支持和宣传。 既然还是有很多学生抱着怀疑得态度，那么留学论文宝老师就来介绍一下自己吧。留学论文宝是2009年成立在英国本地的一家正规论文辅导机构，在十多年的竞争中我们成功地走到了今天并且快速地发展着，直至今日，我们已经成功解决了超过30000留学生的论文课业负担。 留学论文宝的核心力量是辅导老师，作为专业的英文写作辅导老师都是从国外的知名大学毕业的研究生和博士生，因此我们的绝对优势在于： 1、辅导老师资质过硬，不仅师资力量雄厚，而且专业无敌，老师遍布各大高校，因此任何一个留学生都能找到对口的院校专业辅导老师，在英文表达上是绝对没有问题的，在写作技巧上也是非常娴熟的。 2、在辅导水平。在学历上可以分别是本科预科、本科、硕士预科、硕士，有关博士的我们可以提供专业的Proposal指导；在辅导学科上可以是文理科、工科、商科、医学、艺术等；在辅导范围上，可以是平常的期中期末作业、毕业生的Dissertation，留学文书（包括PS个人陈述、CV个人简历、Recommendation 推荐信、成绩单毕业证学位证等各种材料的翻译），还可以是学生的演讲稿、PPT 和调查问卷的制作等。 3、服务态度。辅导老师会根据学生提供的学校学历专业、论文要求、导师上课的课件和风格，学生掌握的知识程度，先列出一份写作大纲，学生满意后方动笔，最后在规定的时间内上交全稿。如果在中间过程学生有不满意的要及时提出来以便修正。最后的全稿会通过客服老师进行专业评估和使用专业的Turn it in检测系统检测抄袭率，保证在5%以下，有不少都是100%原创。所有学生的文章一律过关，还有不少取得了不错的分数呢！ 在留学文书方面，留学论文宝老师因为都是出过国的，所以在对各大学的地理位置、办学特色，甚至对某一个具体知名的导师都是很熟悉的，再加上自己也制作过留学文书，因此事绝对没有问题的。凡是接受过留学论文宝辅导老师的文书制作服务的，都写出了非常满意的PS、CV和推荐信，最后也都拿到了自己梦想大学的offer，留学成功。 如果您想更多地了解留学论文宝，想知道Essay和Dissertation的写作方

Assignment3经原

经济学原理（双学位，2010年秋季学期） 作业3（第12-17章） 上交日期：2010年11月27日课上 第一部分：教材习题（注：括号内为第四版对应的题目号） 第12章，问题与应用，3，6，9，11 第13章，问题与应用，1，4（5），11（10），12（11） 第14章，问题与应用，1（2），4（5），6（7），12（11） （提示：第1题：考虑石油价格上升导致造船的边际成本上升相同的数量。） 第15章，问题与应用，1，6，11（13），13（14） 第16章，问题与应用，6（对应第四版第17 章第5题），7（第17章第7题） 第17章，问题与应用，1（16章3），3（16章4），6（16章6），8（16章9），10（16章11） 第二部分：补充英文题目 Supplemental Questions (Multiple-choice questions if marked with a-d, otherwise True/False questions.) 1. (Ch12) The deadweight loss associated with a tax on a commodity is generated by a. those consumers who still choose to consume the commodity, but pay a higher price that reflects the tax. b. those consumers who choose to not consume the commodity that is taxed. c. all citizens who are able to use services provided by government. d. those consumers who are unable to avoid paying the tax. 2．(Ch13) Adam Smith's example of the pin factory demonstrates that economies of scale result from specialization. (For Chapter 14) 1. The Wheeler Wheat Farm sells wheat to a grain broker in Seattle, Washington. Since the market for wheat is generally considered to be competitive, the Wheeler Farm a. does not choose the quantity of wheat to produce. b. does not have any fixed costs of production. c. is not able to earn an accounting profit. d. does not choose the price at which it sells its wheat. (For Chapter 15) 2．The De Beers Diamond company advertises heavily to promote the sale of all diamonds, not just its own. This is evidence that they have a monopoly position to some degree. (For Chapter 16) 3. A monopolistically competitive firm chooses its production level the same way as a(n) a. monopolist. b. oligopolist. c. perfectly competitive firm.

阅读assignment第一周(1)

I．Read the following passages and sum up its point + support 1. Benefits of Writing the Traditional Essay掌握常见短文写作的好处 Writing a traditional essay offers at least three benefits. First of all, mastering the traditional essay will help make you a better writer. For other courses, you'll often do papers that will be variations on the essay form-for example, examination essays, reports, and research papers. The basic structure of the traditional essay, with its emphasis on a clear point and well-organized, logical support, will help with almost every kind of writing that you have to do. Second, the discipline of writing an essay will strengthen your skills as a reader and listener. As a reader, you'll become more critically aware of other writers' ideas and the evidence they provide (or fail to provide) to support those idea;. Essay writing will also help you become a better speaker. You'll be more prepared to develop the three basic parts of an effective speech一an appealing introduction, a solidly developed body, and a well-rounded conclusion一because of your experience writing three-part essays. Most important, essay writing will make you a stronger thinker. Writing a solidly reasoned traditional essay requires mental discipline and close attention to a set of logical rules. Creating an essay in which there is an overall thesis statement and in which each of three supporting paragraphs begins with a topic sentence is more challenging than writing a free-form or expressive paper. Such an essay obliges you to carefully sort out, think through, and organize your ideas You'll learn to discover and express just what your ideas are and to develop those ideas in a logical, reasoned way. Traditional essay writing, in short, will train your mind to think clearly, and that ability will prove to be of value in every phase of your life. 2. Writing as a Skill写作是一种技能 A sure way to wreck your chances of learning how to write competently is to believe that writing is a "natural gift" rather than a learned skill. People with such an attitude think that they are the only ones for whom writing is unbearably difficult. They feel that everyone else finds writing easy or at least tolerable. Such people typically say, "I'm not any good at writing" or "English was not one of my go od subjects” They imply that they simply do not have a talent for writing. While others do. The result of this attitude is that people try to avoid writing, and when they do write, they don't try their best. Their attitude becomes a self-fulfilling prophecy: Their writing fails chiefly because they have brainwashed themselves into thinking that they don't have the "natural talent" needed to write. Unless their attitude changes, they probably will not learn how to write effectively. A realistic attitude about writing must build on the idea that writing is a skill. It is a skill like driving, typing, or cooking. and, like any skill, it can be learned. If you have the determination to learn, this book will give you the extensive practice needed to develop your writing skills. Many people find it difficult to do the intense, active thinking that clear writing demands. (Perhaps television has made us all so passive that the active thinking necessary in both writing and reading now seems harder than ever.) It is frightening to sit down before a blank sheet of paper and know that an hour later, nothing on it may be worth keeping. It is frustrating to discover how much of a challenge it is to transfer thoughts and feelings from one's head onto a sheet of paper. It is upsetting to find that an apparently simple subject often turns out to be complicated. But writing is not an automatic process: We will not get something for nothing and we should not expect to. For

Assignment要求表(3)

1．Topic： Global Business Situation and Opportunity Analysis 2．Essay or Report格式： 3．Outline（请说说您的想法和要求，以免写出来不是您想要的内容）： An opportunity analysis is used to leverage the marketing strategy and action plan. It is the first part of any marketing plan. The market opportunity identified through this situation and opportunity analysis will become the stated objective of the Global Marketing Plan (Assessment no. 4). Instructions: Choose a business that you find interesting and narrow it to one product or product line. Conduct an analysis of the current internal and external situation of the product/ product line. Internal should include: ? A brief summary of the company structure and its overall capabilities and resources ? Current products/ product line ? Current market/s, including customer behaviour issues, demand and trends, plus sales information (if available) ? Distribution and Supply External should include: ? Competitive environment- a global perspective but stay on the product offering ? Industry situation in particular global markets ? Consider the economic, technological, political, socio-cultural and natural imperatives Conduct a SWOT analysis. Synthesize and summarize the strengths, weakness, opportunities and threats associated with the product/ product line Carefully evaluate the strategic fit of the market opportunity to the company’s capabilities Select one market opportunity that you believe is worth pursuing and justify. This is the stated objective of Global Marketing Strategy Plan (Assessment no. 4) Conclusion

Assignment(旅游文本的翻译)

Assignment: 1.河道、瓦房和石桥组合成了位于上海西侧的周庄，这是淀山湖畔一个风景如画的水乡小 镇。 Zhouzhuang is a small canal town located on the west of Shanghai. The combinations of waterways, tiled houses and stone bridges make up a picturesque view for the shore of Dianshan Lake. A web of waterways, tiled houses and stone bridges holds together Zhouzhuang, a small canal town located on the picturesque shores of the Dianshan Lake, west of shanghai 2.西湖周围有公园、茶馆、旅店，还有清新的空气、秀丽的景致、宁静的气氛、绿树成荫 的街道和拱形的石桥，构成了人们心目中的“中国风景”。 Around West Lake, there are parks, teahouses and hotels. With the fresh air, the inviting views, the pleasant shade and the arched bridges, the elegant environment make it a Chinese Scenery in everyone’s mind. Around the west lake, the air is clear, the landscape green and tranquil, and the avenues of willows and arched stone bridges conform to everyone’s idea of what Chinese scenery should look like. 3.绍兴的鉴湖，湖水清澈，风景秀丽，故又名镜湖。 Because of its clear water and inviting views, the Jianhu in Shaoxing is also known as Mirror Lake. The Jianhu Lake in Shaoxing is also known as Mirror Lake for its crystal clear water and picturesque landscape around. 4.这里不仅民族风情浓郁，同时还是一片具有生命灵气的宝地，草原辽阔，山水环绕。梅 里雪山主峰卡格博，屹立于迪庆西北，海拔6740米，是迪庆的最高点，也是云南第一峰，终年雪冠冰氅，云缠雾罩。 Having a strong flavor of local ethnic color, the prefecture boasts a scenic landscape with surrounding mountains and winding rivers and streams. As the dominant peak of Meili Mountain, the Kagebo Peak is outstanding at the northwest of Diqing with the height of 6740 meters above the sea level . Being covered by snow and surrounded by mist all year, it is known as the first peak of Y unnan province, Radiating with the local ethnic colors of ethnic minorities, the Prefecture boasts a scenic landscapes with surrounding mountains and winding rivers and streams. The Kagebo Peak---the dominant peak of the Meili Mountain range in the northwest of Diqing---stands aloft 6740 meters above the sea level, the highest peak in Diqing and in Yunnan province as well, was covered by snow and shrouded by mist all the year round.

assignment_2(附答案)

Passage 1 (TAP, Translation Journal) Winners do not dedicate their lives to a concept of what they imagine they should be; rather, they are themselves and as such do not use their energy putting on a performance, maintaining pretence, and manipulating others. They are aware that there is a difference between being loving and acting loving, between being stupid and acting stupid, between being knowledgeable and acting knowledgeable. Winners do not need to hide behind a mask. Winners are not afraid to do their own thinking and to use their own knowledge. They can separate facts from opinions and don’t pretend to have all the answers. They listen to others, evaluate what they say, but come to their own conclusions. Although winners can adore and respect other people, they are not totally defined, demolished, bound, or awed by them. Winners do not play “helpless”, nor do they play the blaming game. Instead, they assume responsibility for their own lives. 成功者不会穷其毕生之精力，执着于自我之臆想。相反，他们会保持自己的本色。正因如此，他们不装腔作势，不自命不凡，不对别人指手画脚。他们知道，真爱不同于装爱，真傻有异于装傻、博学有别于卖弄。成功者无需面具来伪装。 成功者无畏于独立思考，无畏于独立判断、独当一面。他们能够在事实与传闻之间明辨是非，不会假称自己无所不晓。他们倾听别人意见，择善从之，最终得出自己的结论。成功者敬仰尊重别人，但他不会受制于人、不会被他们所摧垮、不被他们所束缚、不会被他们所吓倒。 成功者不故意“示弱”，也从不怨天尤人。他们会毅然肩负起人生的责任。Passage 2 The first snow came. How beautiful it was, falling so silently all day long, all night long, on the mountains, on the meadows, on the roofs of the living, on the graves of the dead! All white save the river, that marked its course by a winding black line across the landscape; and the leafless trees, that against the leaden sky now revealed more fully the wonderful beauty and intricacies of their branches. What silence, too, came with the snow, and what seclusion! Every sound was muffled; every noise changed to something soft and musical. No more tramping hoofs, no more rattling wheels! Only the chiming of sleighbells, beating as swift and merrily as the hearts of children. Henry Wadsworth Longfellow The First Snow 初雪飘临，多么美啊！它整日整夜地飘落着，落在山岭上，落在草地上，落在生者的屋顶上，落在逝者的墓地上！在一片洁白之中，只有河流在美丽的画面上划出一道弯弯曲曲的黑线；还有那叶儿落净的树木，映衬着铅灰色的天空，此刻更显得枝丫交错，姿态万千。初雪飘落时，是何等的宁谧，何等的幽静！一切声响都趋沉寂，一切噪音都化作柔和的音乐。再也听不见马蹄得得，再也听不见车轮粼粼！惟有雪橇的叮咚的铃铛，奏出和谐的乐声，那明快欢乐的节拍犹如孩子们心房的搏动。

Assignment 3

Macroeconomics: Assignment 3 (Deadline: at the beginning of Lecture 5) Cheng Sun 1.Readings: Look at the newspapers and magazines for the past few weeks. Are there any discussions about the international capital flow, exchange rate or unemployment rate? How do you interpret these discussions? 2.Consider an economy described by the following equations: Y=C+I+G+NX Y=5000 G=1000 T=1000 C=250+0.75(Y-T) I=1000-50r NX=500-500ε r=r*=5 a)In this economy, solve for national saving, investment, the trade balance, and the equilibrium exchange rate. b)Suppose now that G rises to 1250. Solve for national saving, investment, the trade balance and the equilibrium exchange rate. Explain what you find. c)Now suppose that the world interest rate rises from 5 to 10 percent. G is again 1000. Solve for the national saving, investment, the trade balance and the equilibrium exchange rate, Explain what you find. 3.Consider an economy with the following Cobb-Douglas production function: YY=KK1/3LL2/3 The economy has 1000 units of capital and a labor force of 1000 workers. a)Derive the equation describing labor demand in this economy as a function of the real wage and the capital stock. (Hint: review the first lecture.) b)If the real wage can adjust to equilibrate labor supply and labor demand, what is the real wage? In this equilibrium, what are employment, output, and the total amount earned by workers?

第三次作业及答案

Vocabulary and Structure I. Vocabulary Section A Directions: From the four choices given under each sentence, choose the ONE that is closest in meaning to the underlined word or expression. 1.This failure shaped his attitude to study. A. formed B. adjusted C. framed D. designed 2.You should avoid eating fat meat, pork in particular. A. especially B. partially C. in fact D. in full 3.The printing press turns out a thousand books an hour. A. writes B. carries C. proves D. produces 4.Notice how lifeless the description is in this paragraph. A. vital B. vigorous C. dead D. dull 5.The red flag looks more beautiful against the blue sky. A. in contrast to B. in opposition to C. in protest of D. in support of 6.He promised to help me if I was in trouble and never once was I disappointed. A. he never gave me any help B. he did what he said C. he only helped me once D. he disappointed me just once 7.Early in April the city elections were due. A. sufficient B. attributable C. expected to happen D. required to return 8.Old memories awoke in her when she read the letter. A. alerted her B. came back to her C. appeared in her mind D. opened her eyes 9.Now let’s deal with the events in historical sequence. A. causes B. happenings C. succession D. transition 10.A man who is cruel to animals should be held in contempt. A. should be looked down upon B. should be held in respect C. should show disrespect D. should be punished cruelly 11.When he was at middle school, he had a calling to become a doctor. A. career B. profession C. screaming D. passion 12.We found it very hard to translate what is in the painting into words. A. turn…into a different language B. express…in proper words C. reproduce…in other words D. explain…in a differen t language 13.He had a large body of facts to prove his statements. A. system B. number C. amount D. quality 14.Before you enter the contest, you must take the measure of your contestants. A. know well B. take the sizes of C. grow to the sizes of D. evaluate properly 15.We were very disappointed. He was flat against his promise. A. positively B. completely C. evenly D. particularly Section B Directions: For each of the following sentences there are four choices marked A, B, C, and D.