2010-2011科技英語三上補考標準答案

1、誠信保證本人知曉我校考場規(guī)則和違紀處分條例的有關(guān)規(guī)定，保證遵守考場規(guī)則，誠實做人。本人簽字：編號：西北工業(yè)大學補考試題（標準答案及評分標準）2010 2011 學年第 一 學期開課學院自動化學院課程科技英語（一）學時32考試日期2011 年 3 月 9 日考試時間2 小時考試形式（閉）卷題號一二三四五六七總分得分考生班級學號姓名一、短語英譯漢（20 分）1、absolute permeability絕對磁導率2、normal component法線方向分量3、hysteresis loop磁滯環(huán)4、available precision可用精度5、calculation-intensive a

2、lgorithm運算密集型算法6、smallest Resolvable Difference最小分辨率7、performance specifications性能指標8、converter resolution轉(zhuǎn)換器分辨率9、bipolar junction transistor (BJT)雙極性晶體管10、source follower circuit信號源跟隨電路11、transconductance model跨導模型注： 1. 命題紙上一般不留答題位置，試題請用小四、宋體打印且不出框。2. 命題教師和審題教師姓名應(yīng)在試卷存檔時填寫。共 6 頁第 1 頁西北工業(yè)大學命題專用紙12、an

3、ti-aliasing filter抗混疊濾波器13、sampling rates采樣率14、successive approximation逐次逼近法15、digital filtering數(shù)字濾波16、multi-function instructions多功能指令17、static transformer靜態(tài)變壓器18、looping scheme循環(huán)機制19、self-bias resistor自偏電阻20、Arithmetic Logical Unit運算邏輯單元20 分，每小題各 1 分，共 20 分二、短語漢譯英（20 分）1、剩余磁通密度residual flux densit

4、y2、外設(shè)peripheral sections3、過采樣Over-sampling4、小信號放大器small signal amplifier5、共柵極common gate6、輸出頻譜output spectrum7、模數(shù)轉(zhuǎn)換器Analog to Digital Converters8、印刷電路板printed circuit board9、矯頑磁力coercive force10、磁路magnetic circuit20 分，每小題各 2 分，共 20 分。可酌情考慮寫對部分單詞給1 分。教務(wù)處印制共 6 頁第 2 頁三、短文 （40 分）1、Figure 2.6 shows the o

5、utput spectrum of a typical flash converter as determined by taking an FFT (Fast Fourier Transform) of the converter output samples for a pure sine wave input. One thing is immediately apparent. The spectrum does not simply consist of the pure input sine wave component, but also has a mass of other

6、components spread throughout the measurement band. These largely arise from the inevitable quantization error (noise), because the converter is trying to represent the analog input level from a finite number of available sample values (dictated by the number of bits in the ADC).10 分。共 4 句，第 1、3、 4 句

7、各 3 分；第 2 句 1 分。圖 2.6顯示了一個典型的閃式 ADC 的輸出頻譜。它是通過對 ADC 轉(zhuǎn)換后的純正弦樣本進行快速傅里葉變換（ FFT）得到的。可以立即明確的是：頻譜不是簡單地由輸入正弦分量組成的，還有一些分布在測量帶寬內(nèi)的其他分量。這些分量主要來自不可避免的量化誤差（噪聲）。這是因為轉(zhuǎn)換器試圖使用有限個可用樣值（由 ADC 位數(shù)決定）來代表模擬輸入電平。2、DSPs can be purchased in three forms, as a core, as a processor, and as a board level product. In DSP, the term

8、 core refers to the section of the processor where the key tasks are carried out, including the data registers, multiplier, ALU, address generator, and program sequencer. A complete processor requires combining the core with memory and interfaces to the outside world. While the core and these periph

9、eral sections are designed separately, they will be fabricated on the same piece of silicon, making the processor a single integrated circuit.10 分。共 4 句，第 1、3 句各 2 分；第 2、4 句各 3 分。教務(wù)處印制共 6 頁第 3 頁購買數(shù)字信號處理器有三種方式：購買內(nèi)核、購買處理器和購買板級產(chǎn)品。在數(shù)字信號處理器中，“內(nèi)核”這個詞是指處理器中運行關(guān)鍵任務(wù)的部分；它包括數(shù)字寄存器、乘法器、運算邏輯單元、地址產(chǎn)生器和程序定序器。一個完整的處理器

10、需要將內(nèi)核、存儲器和外部接口組合起來。盡管內(nèi)核設(shè)計和片內(nèi)外設(shè)是分開進行的，但是卻被制作在同一片硅片上；這樣，處理器就能成為單片集成電路。3、CC and CD Amplifiers. The common terminal 2 configuration is used mainly as a buffer amplifier between a signal source and a low impedance load. As a buffer amplifier, the circuit allows the signal to be transferred to the load wh

11、ile preventing the load from directly affecting the source. The main characteristics of this amplifier configuration are, high to very high input resistance, low to very low output resistance, and a voltage gain which is close to, but always lower than, unity. The output voltage follows the input vo

12、ltage, and for this reason the circuits are also known as Emitter Follower, and Source Follower circuits.10 分。共 5 句，第 1 句 1 分；第 2、3、5 句各 2 分；第 4 句 3 分。CC 和 CD 放大器：其為共用端 2 組態(tài)，主要用作信號源與低阻抗負載之間的緩沖放大器。 作為緩沖放大器， 該線路可允許信號傳輸給負載，又可防止負荷直接影響信號。該放大器組態(tài)的主要特征是，高至極高的輸入電阻，低至極低的輸出電阻，以及具有一個接近但總是小于1 的電壓增益。輸出電壓“跟隨”輸入電壓，

13、因此，該電路也稱為射極跟隨器和信號源跟隨電路。4、On the other hand, in other devices an air gap may be intentionally inserted in order to mask the nonlinear relationship existing between B and H. But in spite of the presence of air gaps it happens that the space occupied by the magnetic field and the space occupied by the

14、ferromagnetic material are practically the same. Usually this is because air gaps are made as small as教務(wù)處印制共 6 頁第 4 頁mechanical clearance between rotating and stationary members will allow and also because the iron by virtue of its high permeability confines the flux to itself as copper wire confine

15、s electric current or a pipe restricts water.10 分。共 3 句，第 1 句 2 分；第 2、3 句各 4 分。另外，在其他設(shè)備中，間隙是人為預留的，以消除B 和 H 之間的非線性關(guān)系。盡管有間隙存在，是由磁場充滿，還是由鐵磁性介質(zhì)充滿空間的情況是相同的。通常這是因為間隙與機械靜止部件與旋轉(zhuǎn)部件之間允許的縫隙一樣小；還因為鐵的高磁導率將磁通局限在本身內(nèi)部，這類似于銅導線限制電流，管道限制水流。四、分析句子語法結(jié)構(gòu)并翻譯（20 分 ）1、As we know, the AC voltage generated in each rotating arm

16、ature coil is converted to DC in the external armature terminals by means of a rotating commutator and stationary brushes to which the armature leads are connected.generated in each rotating armature coil 過去分詞短語作定語修飾本句的主語 the AC voltage。by means of指明手段及方法， which 引出的定語從句修飾 stationary brushes，to 是 connected要求的。我們知道，每個旋轉(zhuǎn)的電樞繞組中產(chǎn)生的交流電壓，經(jīng)由一與電樞聯(lián)接的旋轉(zhuǎn)的換向器和靜止的電刷；在電樞繞組出線端轉(zhuǎn)換成直流電壓。共 10 分。語法分析 5 分；句子翻譯 5 分。2、The flash converter operates by simultaneously presenting the input signal to a bank of comparators, whose reference voltages are set by a resistor chain to exactly correspond to all of the possible