研究生课程期末考试试卷
《信息与通信工程专业英语》
学年度第学期
学院：专业：信息与通信工程
姓名：学号：
第一题、通信工程专业英语常用词组翻译。（每小题1.5分，共30分)
1.将下列英文词组翻译为汉语。
（1） Integrated circuit 集成电路
（2） Individual electrons 单个电子
（3） Bandwidth 频带宽度
（4） Conductor length 导体长度
（5） Vector 向量
（6） Interface 界面
（7） Signal frequency 信号频率
（8） Voltage 电压
（9） Integral form 积分形式
（10）Tensor 张量
2.将下列汉语词组翻译为英语。
（1）模拟器simulator
（2）传导率conductivity
（3）模式识别pattern recognition
（4）种类category
（5）数字技术digital techniques
（6）语音识别speech recognition
（7）磁共振magnetic resonance
（8）虚拟现实virtual reality
（9）放大器amplifier
（10）信息技术information technology
第二题、英文和汉语词组正确搭配。（每小组1分，共10分）
（a）Modulation sidebands 数据信道f
（b）Intermediate frequency 中频b
（c）Analog system 有监督学习e
（d）Feedback network 载波信道j
（e）Supervised learning 模拟系统c
（f）Data channel 反馈网络d
（g）Adaptive learning 数字信号处理h
（h）Digital signal processing 调制边带a
（i）Negative feedback 自适应学习g
（j）Bearer channel 负反馈i
第三题、将下面几段文字翻译为汉语。（每小题4分，共12分）
1.Wi-Fi is the trademark for the popular wireless technology used in home networks, mobile phones, video games and other electronic devices that require some form of wireless networking capability.
Wifi 是流行无线技术的标志，用在家庭网络、移动电话、电子游戏等其他需要某种形式的无线网络容量的电子设备上。 2.The natural sensors, like those found in living organisms, usually respond with signals, having an electro-chemical character, that is, their physical nature is based on ion transport, like in the nerve fibers. 天然的传感器，像在活体生物中发现的那些传感器，通常以具有电化学特性的信号作为响应，也就是说，它们的物理性质基于离子传输，像在神经纤维一样。 3. Some of the resulting wavelet coefficients correspond to details in the data set. If the details are small, they might be omitted without substantially affecting the main feature of the data set. 得到某些小波系数对应于数据集中的细节量。如果这些细节量取值小，可以忽略不计，而不会对数据集中的主要特征产生本质影响。
第四题、将下面几段文字翻译为英语。（每小题4分，共8分） 1. 输入权重和阈值的加入使得神经元更加灵活与强大。神经元具有通过改变权值或者阈值来适应具体情况的能力。 The addition of input weights and thresholds makes neurons more flexible and powerful. Neurons have the ability to adapt to specific situations by changing weights or thresholds. 2. 如果我们把光波看作一种电磁波，那么无线通信的历史可以追溯到宇宙的起源。自从远古人类开始通过在山顶之间呐喊的方式来传递信息，人类便开始希望通过无线进行便捷有效的交流。 If we think of light as an electromagnetic wave, the history of wireless communication can
be traced back to the origin of the universe. Since ancient humans began to transmit information by shouting from top to top, they began to hope for convenient and effective communication through wireless.
第五题、将读下面的2篇阅读，并为每道题选择唯一正确的答案。（每小题2分，共20分）
Questions 1 to 5 are based on the following passage.
America's education system has become less a ladder of opportunity than a structure to transmit inequality from one generation to the next.
That's why school reform is so critical. This is an issue of equality, opportunity and national conscience. It's not just about education, but about poverty and justice. It's true that the main reason inner-city schools do poorly isn't teachers' unions, but poverty. Southern states without strong teachers' ，unions have schools at least as awful as those in union states. Some Chicago teachers seem to think that they shouldn't be held accountable until poverty is solved. There are steps we can take that would make some difference, and Mayor Rahm Emanuel is trying some of them—yet the union is resisting.
I'd be sympathetic if the union focused solely on higher compensation. Teachers need to be much better paid to attract the best college graduates to the nation's worst schools. But, instead, the Chicago union seems to be using its political capital primarily to protect weak performers.
There's solid evidence that there are huge differences in the effectiveness of teachers. The gold standard study by Harvard and Columbia University scholars found that even in high-poverty schools, teachers consistently had a huge positive or negative impact.
Get a bottom 1% teacher, and the effect is the same as if a child misses 40% of the school year. Get a teacher from the top 20%, and it's as if a child has gone to school for an extra month or two.
The study found that strong teachers in the fourth through eighth grades raised the skills of their students in ways that would last for decades. Just having a strong teacher for one elementary year left pupils a bit less likely to become mothers as teenagers, a bit more likely to go to college and earning more money at age 28.
How does one figure out who is a weak teacher? Yes, that's a challenge. But researchers are improving systems to measure a teacher's performance throughout the year, and, with three years of data, ifs usually possible to tell which teachers are failing.
Unfortunately, the union in Chicago is insisting that teachers who are laid
off—often for being ineffective—should get priority in new hiring. That's an insult Array to students.
Teaching is so important that it should be like other professions, with high pay
and good working conditions but few job protections for bottom performers.
This isn't a battle between garment workers and greedy bosses. The central
figures in the Chicago schools strike are neither strikers nor managers but 350,000
children. Protecting the union demand sacrifices those students, in effect turning a
blind eye to the injustice in the education system.
1. What do we learn about America's education system?（B）
A) It provides a ladder of opportunity for the wealthy.
B) It contributes little to the elimination of inequality.
C) It has remained basically unchanged for generations.
D) It has brought up generations of responsible citizens.
2. What is chiefly responsible for the undesirable performance of inner-city schools?（B）
A) Unqualified teachers. C) Unfavorable learning environment.
B) Lack of financial resources. D) Subconscious racial discrimination.
3. What does the author think the union should do to win popular support?（C）
A) Assist the city government in reforming schools.
C)Demand higher pay for teachers.
B) Give constructive advice to inner-city schools.
D)Help teachers improve teaching.
4. What is the finding of the gold standard study by Harvard and Columbia University scholars?（D）
A) Many inner-city school teachers are not equal to their jobs.
B) A large proportion of inner-city children often miss classes.
C) Many students are dissatisfied with their teachers.
D) Student performance has a lot to do with teachers.
5. Why does the author say the Chicago unions demand is an insult to students?（A）
A) It protects incompetent teachers at the expense of students.
B) It underestimates students, ability to tell good teachers from poor ones.
C) It makes students feel that they are discriminated against in many ways.
D) It totally ignores students，initiative in the learning process.
Questions 6 to 10 are based on the following passage.
Air pollution is deteriorating in many places around the world. The fact that public parks in cities become crowded as soon as the sun shines proves that people long to breathe in green, open spaces. They do not all know what they are seeking but they flock there, nevertheless. And, in these surroundings, they are generally both peaceful and peaceable. It is rare to see people fighting in a garden. Perhaps struggle unfolds first, not at an economic or social level, but over the appropriation of air, essential to life itself.
If human beings can breathe and share air, they don't need to struggle with one another. Unfortunately, in our western tradition, neither materialist nor idealist theoreticians give enough consideration to this basic condition for life. As for politicians, despite proposing curbs on environmental pollution, they have not yet called for it to be made a crime. Wealthy countries are even allowed to pollute if they pay for it.
But is our life worth anything other than money? The plant world shows us in silence what faithfulness to life consists of. It also helps us to a new beginning, urging us to care for our breath, not only at a vital but also at a spiritual level. The interdependence to which we must pay the closest attention is that which exists between ourselves and the plant world. Often described as "the lungs of the planet", the woods that cover the earth offer us the gift of breathable air by releasing oxygen. But their capacity to renew the air polluted by industry has long reached its limit. If we lack the air necessary for a healthy life, it is because we have filled it with chemicals and undercut the ability of plants to regenerate it. As we know, rapi deforestation combined with the massive burning of fossil fuels is an explosive recipe for an irreversible disaster.
The fight over the appropriation of resources will lead the entire planet to hell unless humans learn t share life, both with each other and with plants. This task is simultaneously ethical and political because can be discharged only when each takes it upon herself or himself and only when it is accomplished together with others. The lesson taught by plants is that sharing life expands and enhances the sphere c the living, while dividing life into so-called natural or human resources diminishes it.
We must come t view the air, the plants and ourselves as the contributors to the preservation of life and growth, rather than a web of quantifiable objects or productive potentialities at our disposal. Perhaps then we would finally begin to live, rather than being concerned with bare survival.
6. What does the author assume might be the primary reason that people would struggle with each other（A）
A. To get their share of clean air.
B. To pursue a comfortable life.
C. To gain a higher social status.
D. To seek economic benefits.
7. What does the author accuse western politicians of ?（D）
A. Depriving common people of the right to clean air.
B. Giving priority to theory rather than practical action.
C. Offering preferential treatment to wealthy countries.
D. Failing to pass laws to curb environmental pollution.
8. What does the author try to draw our closest attention to?（
B）
A. The massive burning of fossil fuels.
B. Our relationship to the plant world.
C. The capacity of plants to renew polluted air.
D. Large-scale deforestation across the world.
9. How can human beings accomplish the goal of protecting the planet according to the author?（D）
A. By showing respect for plants.
B. By preserving all forms of life.
C. By tapping all natural resources.
D. By pooling their efforts together.
10. What does the author suggest we do in order not just to survive?（C）
A. Expand the sphere of living.
B. Develop nature's potentials.
C. Share life with nature.
D. Allocate the resources.
第六题、写作。（20分）
In recent years,“Wechat”is becoming increasingly popular. Many people express themselves, exchange ideas and deliver information by Wechat. Some people believe that Wechat is good for us, while others hold that it creates many problems. Please write an essay to give your comments on Wechat. You should write no less than 200 words on the ANSWER SHEET.
中国联通China Unicom 中国移动China Mobile 网络容量network capacity 交换容量exchange capacity 扩容Capacity Expansion 平滑升级smooth upgrade 射频Radio Frequencies 接收灵敏度Receive Sensitivity: 数据Data Options 传输速率Data Rate 电源部分Power supply 数据接口Data Interface 天线接口Antenna Interface 传输速率Baud Rate 用户交互界面User Interface 认证Certifications 网络数据传输数率net data transfer rate 联通无限U-Max 旗下subordinate] 品牌trademark U-Info 互动视界U-Magic 神奇宝典 U-Net 掌中宽带 U-Mail 彩e U-Map 定位之星 U-Sms 联通在信 应用服务Application Service 产业价值链industrial value chain 战略目标strategic objective 渠道channel 转型transition/Transformation 推广extension 针对aim at 电信telecommunication 整合conformity 市场渗透率market penetration factor 微观的microcosmic 科学技术science and technology 地理环境geographic environment 宏观的macroscopical 供应链supply chain 产品种类product variety
2010-2011第二学期专业英语试卷A答案 1.Translate the following Chinese terms into English ( one point for each,20 points for all) 1) 汽车与工程机械automobile and construction machinery 2) 筑路机械road-making machine 3) 发电机generator 4) 起动马达self starter 5) 方向盘steering wheel 6) 进气门inlet valve 7) 齿轮泵gear pump 8) 机油滤清器oil filter 9) 差速器differential 10) 摩擦式离合器friction clutch 11) 蓄电瓶storage battery 12) 铲土运输机scraper 13) 塔式起重机tower crane 14) 叉车fork lift 15) 商业车辆commercial vehicle 16) 变速箱transmission box (gear box) 17) 带式输送机belt conveyer 18) 步履式挖掘机walking excavator 19) 颚式砸机jaw crusher 20) 履带和轮胎track and tire 2.Translate the following English terms into Chinese (one point for each, total 20 points) 1) gasoline and diesel 汽油和柴油 2) flywheel and cam 飞轮和凸轮 3) disk brake 盘式制动器 4) mechanical vibration 机械振动 5) power steering 动力转向 6) vibratory roller 振动式压路机 7) hydraulic torque converter 液力变矩器 8) piston ring 活塞环 9) suspension system 悬挂系统 10) cab and chassis 驾驶室与底盘 11) radiator 散热器 12) fuel-injection system 燃油喷射系统 13) air compressor 空气压缩机 14) lubrication and lubricant 润滑与润滑剂
通信一班序号：28 姓名：粟清明学号：14102301239 JXTA is a crystallization by Sun company's chief scientist Bill Joy's more than twenty years of brewing."JXTA technology is a platform for Network programming and calculation.To solve the modern distribution calculation especially peer-to-peer (Peer to Peer, P2P) in the calculation of the problem". [1] JXTA research project,which will provide a new framework that make the user more convenient to access to connect on the Internet's personal computer resources, thus further expand Internet 's space. At the same time JXTA is also the Sun's "ONE Internet" strategic continuance, and will take a more positive attitude to compete with the .net strategy of Microsoft and Hailstorm plan . JXTA agreement defines a set of six agreement based on XML, the organization of node into node group, release and found some resources, communication and mutual monitoring provides standardized method. (Endpoint Routing Protocol,ERP) is used for node found routing.To send a message to other nodes, and through the potential firewall and connection. (Rendezvous Protocol,RVP) s used for the nodes in the group to spread information.(Peer Resolver Protocol,PRP) is Used to one or more points to send general inquiries, and receive the response of inquiries. (Peer Discovery Protocol, PDP) is used to release and found advertising resources. (Peer Information Protocol, PIP) used to get other nodes state Information. (Peer Binding Protocol, PBP), can let a node with another node or between more nodes to set up virtual communication channel or pipeline. Compared to the nowadays general communication mode .P2P has many advantages, but it also has a lot of problems waiting to be solved.Firstly, each Peer in P2P is an active participant,in order to make the network performance increase, they need more Peer's participation, so that will result in the network's huge, manage this network will is a complex project; Secondly, P2P agreement compares with traditional
通信工程导论 论文题目 院系 专业 班级 学号 学生姓名 联系方式 年月 摘要 通信工程专业与信息的联系是密不可分的。信息是可以描述的客观现象，且具有一定物理含义的消息或知识，信息是可以用数值、文字、声音、图像等形式描述的状态，信息是用数据作为载体来描述和表达的客观现象，信息是对数据加工提炼的结果，是对人类有用的知识，信息是隐含在物理信号中具有一定含义的消息，信号处理的目的是为了从信号中获取有用的知识。信息技术的内涵包括传感，通信和计算机。主要分为两类：一类是管理信息系统；另一类是指面对自然科学领域的工程。 关键词：通信，技术，系统，光纤、数字微波、卫星、移动、3G、4G、CDMA 引言 在经过李老师的精彩讲解之后，我对通信工程专业有了更加清晰的认识，了解了通信专业的发展，我国目前通信产业的现状以及未来发展的方向。使我对自己未来大学四年的规划，目标更加明确。其中老师主要介绍了通信行业的发展趋势、通信系统的组成、通信工程专业的培养目标、通信工程专业的课程体系还有
与我们息息相关的生活方面的建议、简单说说毕业后的去向。在此表示衷心感谢！在科技发展如此迅速的今天，通信业在社会中占据着不可替代的地位，各种各样的信息每天都在变换着。何谓信息？不知道有多少人知道。从古老的结绳记事，烽火传烟，飞鸽传书，到当前的手机，网络，电话等等通信方式，人们的通信方式发生了翻天覆地的变化，变的更加方便，快捷，舒适，给人类的沟通带来了无与伦比的便捷，缩短了时空的距离，提高了沟通的效率，为经济发展全球化铺上了高速通道。可以说通信方式的发展促进了时代的进步，当然这离不开科技的发展，更重要的是离不开一门专业——通信工程的发展。合肥学院独具特色的第二课堂管理体系，使我校的办学能力不断的提升，下面将进行介绍。胡国华老师对我们通信工程专业的发展及就业方向、发展前景也进行了详细的介绍。下面我将给大家详细介绍。 目录 一、引子： (1) 二、通信工程的含义： (1) 三、通信工程专业的培养目标： (3) “平台+模块”形式的课程体系： (3) 四个平台+ 三个方向： (4) 四个平台 (4) （1）通识基础教育平台； (4) 三个方向 (4) 四、通信工程专业发展趋势和毕业生去向： (5) 光纤通信发展前景 (5) 无线通信发展前景 (5) 就业现状: (6) 就业前景: (6) 五、通信工程实验室建设背景： (7) 2、通信工程实训中心实验室建设内容 (7) 六、开设的实训项目 (7)
第一课现代数字设计及数字信号处理 课文 A: 数字信号处理简介 1.什么是数字信号处理？ 数字信号处理，或DSP，如其名称所示，是采用数字方式对信号进行处理。在这种情况下一个信号可以代表各种不同的东西。从历史的角度来讲，信号处理起源于电子工程，信号在这里意味着在电缆或电话线或者也有可能是在无线电波中传输的电子信号。然而，更通用地说，一个信号是一个可代表任何东西--从股票价格到来自于远程传感卫星的数据的信息流。术语“digital”来源于“digit”，意思是数字（代可以用你的手指计数），因此“digital”的字面意思是“数字的，用数字表示的”，其法语是“numerique”。一个数字信号由一串数字流组成，通常（但并非一定）是二进制形式。对数字信号的处理通过数字运算来完成。 数字信号处理是一个非常有用的技术，将会形成21世纪的新的科学技术。数字信号处理已在通信、医学图像、雷达和声纳、高保真音乐产生、石油开采等很广泛的领域内引起了革命性的变革。这些领域中的每一个都使得DSP技术得到深入发展，有该领域自己的算法、数学基础，以及特殊的技术。DSP发展的广度和深度的结合使得任何个人都不可能掌握已发展出的所有的DSP技术。DSP教育包括两个任务：学习应用数字信号处理的通用原则及学习你所感兴趣的特定领域的数字信号处理技术。 2.模拟和数字信号 在很多情况下，所感兴趣的信号的初始形式是模拟电压或电流，例如由麦克风或其它转换器产生的信号。在有些情况下，例如从一个CD播放机的可读系统中输出的信号，信号本身就是数字的。在应用DSP技术之前，一个模拟信号必须转换成数字信号。例如，一个模拟电压信号，可被一个称为模数转换器或ADC的电路变换成数字信号。该转换器产生一系列二进制数字作为数字输出，其值代表每个采样时刻的输入模数转换设备的电压值。 3.信号处理 通常信号需要以各种方式处理。例如，来自于传感器的信号可能被一些没用的电子“噪声”污染。测心电图时放在病人胸部的电极能测量到当心脏及其它肌肉活动时微小的电压变化。信号也常会被来自于电源的电磁干扰所影响。采用滤波电路处理信号至少可以去掉不需要的信号部分。如今，对信号滤波以增加信号的质量或抽取重要信息的任务越来越多地由DSP技术完成而不是采用模拟电路完成。 4.DSP的发展和应用 数字信号处理的发展起源于60年代大型数字计算机进行数字处理的应用，如使用快速傅立叶变换（FFT）可以快速计算信号的频谱。这些技术在当时并没有被广泛应用，因为通常只有在大学或者其它的科研机构才有合适的计算机。 由于当时计算机很贵，DSP仅仅局限于少量的非常重要的应用。先驱们的探索工作主要集中在4个关键领域：雷达和声纳，用于保卫国家安全；石油开采，可以赚大量的钱；空间探索，其中的数据是不能重复产生的；及医学图像，可以救治生命。 20世纪80年代到90年代个人电脑的普及使得DSP产生了很多新的应用。与以往由军方或政府的需求驱动不同，DSP突然间由商业市场的需求驱动了。任何认为自己能在这个飞速发展的领域赚钱的人都会立即成为DSP供应商。DSP通过在移动电话、CD播放器及语音邮件等产品中应用进入了公共应用领域。 这些技术革命是自上而下发生的。在20世纪80年代早期，DSP是电子工程专业的研究
广东纺织职业技术学院2010～2011学年第一学期 《专业英语》期中考试参考答案 一、单词翻译（英译汉） titrimetric 滴定的analysis 分析 reagent 试剂titrant 滴定剂 flask 烧瓶oxidation 氧化 precision 精密度standard solution 标准溶液sodium hydroxide 氢氧化钠Equilibrium constant 平衡常数equilibrium. 平衡manifest 出现，表明equilibrium concentration 平衡浓度frictional flow 有摩擦的流动ionization constant 电离常数correct for 做……的修正molarity 物质的量浓度compressed gas 压缩气体neutralization 中和device 装置，设备plus 正的，加的elevation 海拔，地理高度neutral 中性的positive-displacement 正位移 meter 米，公尺，计， 表，仪表 reciprocating 往复的，来回的sodium hydroxide 氢氧化钠piston 活塞 external 外部的(常与to 搭配) centrifugal pump 离心泵，离心抽 机 in the absence of 缺乏……时， 当……不在时 rotational 转动的，轮流的 at the expense of 归……付费，在 损害……的情况 下 rotational velocity 旋转速度 compensation 补偿，赔偿stream 溪，川，流，一 股，一串，河流 specific 特定的upstream station 上游截面 streamline .流线downstream station 下游截面 二、单词翻译（汉译英） normal to surface 垂直于传热面discharge 滤饼卸料 correspondence 符合，一致ceramic 陶器的 momentum 动量，动力，要素filtrate 滤液 momentum transfer 动量传递opening 孔 random motion 随机运动，无规则 运动 colloidal particle 胶体微粒 diffused 扩散的configuration 构造，配置 adjacent .邻近的，接近的fluctuation . 波动，起伏 vibrating 振动的，振荡的atm(atmosphere) 大气压(1atm＝ 101. 3 kPa) bulk temperature (远离表面的)流vane (风车、螺旋桨等
一、二、 十一、汉译英时分多址：TDMA （Time Division Multiple Address/ Time Division Multiple Access）2、通用无线分组业务：GPRS General Packet Radio Service 3、国际电报电话咨询委员会：CCITT 4、同步数字体系：SDH Synchronous Digital Hierarchy （同步数字序列） 5、跳频扩频：FHSS frequency hopping spread spectrum 6、同步转移模块：STM synchronous transfer module 7、综合业务数字网：ISDN Integrated Services Digital Network 8、城域网：MAN Metropolitan Area Network 9、传输控制协议/互联网协议：TCP/IP Transmission Control Protocol/Internet Protocol 10、服务质量：QOS Quality of Service 11、中继线：trunk line 12、传输速率：transmission rate 13、网络管理：network management 14、帧结构：frame structure 15、移动手机：Mobile Phone 手机 Handset 16、蜂窝交换机：（Cellular switches）（电池开关cell switch）(cell 蜂房) 17、天线：Antenna 18、微处理器：microprocessor 19、国际漫游：International roaming 20、短消息：short message 21、信噪比：SNR(Signal to Noise Ratio) 22、数字通信：Digital communication 23、系统容量：system capacity 24、蜂窝网：cell network（cellular network）（Honeycomb nets） 25、越区切换：Handover 26、互联网：internet 27、调制解调器：modem 28、频谱：spectrum 29、鼠标：Mouse 30、电子邮件：electronic mail E-mail 31、子网：subnet 32、软件无线电：software defined radios 33、网络资源：network resources 十二、英译汉 1、mobile communication：移动通信 2、Computer user：计算机用户 3、Frame format：帧格式 4、WLAN：wireless local area network 无线局域网络 5、Communication protocol：通信协议 6、Transmission quality：传输质量 7、Remote terminal：远程终端 8、International standard：国际标准 9、GSM：全球移动通信系统 Global System for Mobile Communications 10、CDMA：码分多址Code Division Multiple Access 11、ITU：国际电信联盟 International Telecommunication Union 12、PCM：pulse code modulation 脉冲编码调制 13、WDM：波分复用Wavelength Division Multiplex 14、FCC：联邦通信委员会 Federal communications commission 15、PSTN：公用电话交换网 Public Switched Telephone Network 16、NNI：网络节点借口Network Node Interface 17、WWW：万维网World Wide Web 18、VOD：视频点播Video-On-Demand 19、VLR：访问位置寄存器 Visitor Location Register 20、MSC：移动交换中心Mobile Switching Centre 21、HLR：原籍位置寄存器Home Location Register 22、VLSI：超大规模集成电路 Very Large Scale Integrated Circuits 23、Bluetooth technology：蓝牙技术 24、Matched filter：匹配滤波器 25、ADSL：非对称数字用户环路Asymmetrical Digital Subscriber Loop非对称数字用户线路(Asymmetric Digital Subscriber Line) 26、GPS：全球定位系统Global Position System 27、ATM：异步传输模式Asynchronous Transfer Mode
The General Situation of AT89C51 The AT89C51 is a low-power, high-performance CMOS 8-bit microcomputer with 4K bytes of Flash Programmable and Erasable Read Only Memory (PEROM) and 128 bytes RAM. The device is manufactured using Atmel’s high density nonvolatile memory technology and is compatible with the industry standard MCS-51?instruction set and pin out. The chip combines a versatile 8-bit CPU with Flash on a monolithic chip; the Atmel AT89C51 is a powerful microcomputer which provides a highly flexible and cost effective solution to many embedded control applications. Features: ?Compatible with MCS-51?Products ?4K Bytes of In-System Reprogrammable Flash Memory ?Endurance: 1,000 Write/Erase Cycles ?Fully Static Operation: 0 Hz to 24 MHz ?Three-Level Program Memory Lock ?128 x 8-Bit Internal RAM ?32 Programmable I/O Lines ?Two 16-Bit Timer/Counters ?Six Interrupt Sources ?Programmable Serial Channel ?Low Power Idle and Power Down Modes The AT89C51 provides the following standard features: 4K bytes of Flash, 128 bytes of RAM, 32 I/O lines, two 16-bit timer/counters, a five vector two-level interrupt architecture, a full duplex serial port, on-chip oscillator and clock circuitry. In addition, the AT89C51 is designed with static logic for operation down to zero frequency and supports two software selectable power saving modes. The Idle
Lesson eight 第八课 Ⅱ.翻译句子，并注意remain和above的词类和词义 2. In this case the voltage applied must remain unchanged. 在这种情况下，那个应用电压必须保持不变 4. If you take 3 from 8, 5 remain. 如果从8中拿走3，剩5. 6. The above property was discovered by Faraday. 法拉第发现以上性质。 8. Lenz states that the self-induced emf impedes any change of current and tends to support the former current value. The above is known as Lenz’s law. 楞茨陈述自感电动势阻止电流的变化而保持先前电流的值。上面就是我们所知的楞 次定律。 Ⅲ.翻译句子，注意some的词义 2. That radio receiver weighs some five kilograms. 那个无线接收器重五公斤。 4. Some element in the substance is not known. 物质中的一些元素是人们不知道的。 Ⅳ.翻译句子，注意句中one 的不同用法和词义。 2. This concept was discussed in Chapter One. 这个概念在第一张讨论过。 4. No one can lift this equipment. 没人能举起这件设备。 6. This chapter will deal with one of the three functions of a turning circuit. 这章我们将介绍螺旋电路三个功能中的一个。 8. Before one studies a system, it is necessary to define and discuss some important terms. 在研究一个系统之前，确定且讨论一些重要的术语是有必要的。 Ⅴ.画出句中的名词从句，说明其种类，并将句子译成汉语。 2. These experiments do not show which particles. 这些实验不能显示他们的粒子结构。 4. The operating point is determined by how much bias is used. 操作要点是被用多少偏压决定的。 6. It is not important how this voltage is produced. 这个电压是怎么产生的并不重要。 8. It may be questioned whether this approach is the best for the physicist. 这种方式最适合于医生可能会被质疑。 10. This ball may be used to determine whether that body is charged. 这个球可能用于检测是否身体是带电的。 12. It is known that charged particles emit electromagnetic waves whenever they are accelerated. 众所周知的当电子被加速他们就会发射电磁波。 14. The value of this factor determines how fast the amplitude of the current
Unit 13 Comparison between GSM and CDMA GSM与CDMA之比较 Using CDMA/FDD technology, subscribers of CDMA cellular mobile communication system can transmit their information simultaneously through the same channel. On the other hand, the GSM system adopts TDMA/FDD method to transmit and distinguish information from different GSM mobile stations. In addition, in favor of QCELP arithmetic, RAKE receiver, power control and soft switching etc., CDMA shows more advantages in its system performance than the GSM, such as greater anti-interference capability, bigger system capacity, higher successful connection ratio, fewer off-line chances, low probability of intercept(LPI), and so on. 使用码分多址/频分双工技术，用户的蜂窝移动通信系统的传输信息的同时，通过同样的渠道。另一方面，该系统采用时分多址/频分双工传输的方法和识别信息从不同的移动台。此外，有利于中国电信集团广州研发中心算术，耙式接收器，功率控制和软开关等，显示出更多的优势在码分多址系统性能比，如更高的抗干扰能力，更大的系统容量，连接成功率较高，离线的机会少，低截获概率（低截获概率），等。 1, Power Control and RAKE Receiver功率控制和瑞克接收机 When different subscribers send their information to the same BS(base station), different signal power caused by different transmitting distances will consequentially cause interference with each other, especially for those MSs(mobile station) being far away from BS will be seriously disturbed because of their almost submerged signals by signals of the close-to-BS MSs.[2] p110 In order to solve this problem and keep high system performance, power control technique is introduced in CDMA communication system, which can effectively overcome this cross-disturbance. As one of the core techniques in CDMA cellular mobile communication system, power control can make the signal power from all subscribers to the BS equivalent through adjusting the transmitting power from each subscriber. 为解决这一问题，保持较高的系统性能，功率控制技术介绍了码分多址通信系统，它可以有效地克服这cross-disturbance。作为一个核心技术在蜂窝移动通信系统的功率控制，可以使信号功率从所有用户的学士学位相当于通过调整发射功率，从每个用户。 Power control can be not only divided to open-loop control and closed-loop control, but also to forward (down) power control and backward (up) power control. For open-loop control method, subscriber adjusts emitting power according to the measured frame error probability, while for the closed-loop power control, base station measures the signal-to-noise ratio of received signals and then adjust the transmitting power of corresponding MS. 功率控制不仅可以分为开环控制和闭环控制，而且还提出了（下）功率控制和反向功率控制（上）。开环控制方法，用户调整发射功率根据测量帧错误概率，同时为闭环功率控制，基站测量接收信号的信噪比，然后调整发射功率相应的女士 The backward power control in CDMA system can be divided into two kinds of control technique, the open-loop backward power control only used by mobile station, and the closed-loop
分1. There can be no doubt the 1900s is remembered as the electronic century. A. which B. that C. what 2. Electrons, as one knows, are minute charge of electricity. A. negative B. positive C. reverse 3. A resistor is an electrical component that the flow of electrical current. A. increases B. changes C. resists 4. Frequency is the reciprocal of the period, if the period is 4ms, then the frequency would be . A. 4m/s B. C. 25Hz 5. The sixth power of two is . A. 12 B. 36 C. 64 6. A capacitor will block current, but appears to pass current by charging and discharging. A. DC …IC B. AC …DC C.
DC …. AC 7. For a 4-band resistor with “color code ”, the first band is the values. A. hundreds B. tens C. ten 8. An electronic device often used for amplifying voltage and current is _____________. A. transistor B. conductor C. diode 9. In a diode, current flows in ________ direction across the junction. A. only one B. two C. three 10. A __________ amplifier provides signal amplification with little or no distortion, so that the output is proportional to the input. A. nonlinear B. linear C. 1.电压有效值（ ） 2. 微处理器（ ） 3.电子元件（ ） 4.公共端插孔（ ） 5.外阻（ ） 6.放大器（ ） 7.脉冲直流（ ） 8.电压源（ ） 9.系统设计（ ） 10.逻辑运 算（ ） （1）internal resistance （2） pulsating DC （3）voltage sources （4）logic circuits （5）RMS voltage （6）logic operation （7）external resistance （8）number systems （9）Microprocessor （10）amplifier （11）common jack （12）digital logic circuits （13）system design （14）anode of diode （15）electrical 三、短语翻译（每小题 2 分，共 20 分） 1. Passive electrical circuits 2. Assembler language 3. The address bus 4. Analog multimeter 5. Semiconductor material 6. chip holders 7. peak-to-peak voltage 8. dual-trace oscilloscope 9. Flowchart 10. Signal generator 四、句子翻译（每小题 5 分，共 201. The impact of digital integrated circuits on our modern society has been pervasive. Without them, the
通信工程专业英语翻译 JXTA is a crystallization by Sun company's chief scientist Bill Joy's more than twenty years of brewing."JXTA technology is a platform for Network programming and calculation.To solve the modern distribution calculation especially peer-to-peer (Peer to Peer, P2P) in the calculation of the problem".[1] JXTA research project,which will provide a new framework that make the user more convenient to access to connect on the Internet's personal computer resources, thus further expand Internet 's space. At the same time JXTA is also the Sun's "ONE Internet" strategic continuance, and will take a more positive attitude to compete with the .net strategy of Microsoft and Hailstorm plan . JXTA agreement defines a set of six agreement based on XML, the organization of node into node group, release and found some resources, communication and mutual monitoring provides standardized method.(Endpoint Routing Protocol,ERP) is used for node found routing.To send a message to other nodes, and through the potential firewall and connection.(Rendezvous Protocol,RVP) s used for the nodes in the group to spread information.(Peer Resolver Protocol,PRP) is Used to one or more points to send general inquiries, and receive the response of inquiries.
物流专业英语试卷 一、Translation(30分) 1．Container transport 2．International freight forwarding agent 3．Order cycle time 4．Inventory turnover 5．Environmental logistics 6．Carrying cost 7．Material handling 8．Demand forecasting 9．Reverse logistics 10．Agile logistics 11．Third-party logistics 12．Initial investment 13．Warehouse facility 14．Material procurement 15．Point of consumption 16．多式联运 17．分销渠道 18．条码 19．订单处理 20．保税仓库 21．前置期 22．叉车 23．门到门 24．准时制物流 25．拣选 26．提货单 27．发货区 28．进口税 29．规模经济 30．供应链整合 二、Translate the sentences into Chinese(40分) 1、Customer service involves getting the right product to the right customer at the right place, in the right condition and at the right time, at the lowest total cost possible.