準直計數器 的英文怎麼說

中文拼音 [zhǔnzhíjìshǔqì]
準直計數器 英文
collimated counter
  • 準 : Ⅰ名詞1 （標準） standard; guideline; criterion; norm 2 （目標） aim; target Ⅱ動詞1 （依據; 依照）...
  • 直 : Ⅰ形容詞1 （成直線的; 硬挺的） straight; stiff 2 （跟地面垂直的; 從上到下的; 從前到后的） erect; v...
  • 計 : Ⅰ動詞1 （計算） count; compute; calculate; number 2 （設想; 打算） plan; plot Ⅱ名詞1 （測量或計算...
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 器 : 名詞1. （器具） implement; utensil; ware 2. （器官） organ 3. （度量; 才能） capacity; talent 4. （姓氏） a surname
  • 計數 : count; tally; counting計數卡 numbered card
  1. Counters can, of course, be made highly directional by the use of external collimation.

    當然可以利用外部準直法來提高計數器的方向性。
  2. In the positioning servo - system, which generally is configured by the d. c. pulse width modulator ( pwm ) velocity governing system and position servo - loop, the parameter perturbance of pwm velocity loop really exist by reason of such as the load behavior ; power voltage supply ; operating setting value, etc. 1, 2 ， and it cannot be ignored. by using the identification technique to form the mathematical model of the system, authors have confirmed the facts. therefore, to design the discrete sliding mode controller ( dsmc ) of the positioning servo - system, the perturbed parameters value bounds of the pwm velocity loop, which is as the controlled plant of position servo - loop, should be accounted. consequently, the design principle of dsmc for accounting system with parameter perturbance is proposed by the authors. the proposed method can ensure the stability of system with parameter perturbance and the behavior of non - overshoot, fast precise positioning. in order to reveal the effects of the design method, the comparative research work is done by the authors. also, it has been tested in an industrial experiment, the results proved it is satisfactory

    由直流脈寬調速系統（ pwm ）和位置環構成的定位系統中，速度環的參數隨負載特性；電網電壓；給定工況而攝動是不容忽視的.作者通過系統辨識建模也證實了這一事實1 ， 2 .因此在設計位置環的離散滑模控制時，必須針對速度環（即位置環的控制對象）的參數攝動范圍採用「對象參數攝動離散滑模控制器的設計方法」 ，以確保系統在參數攝動時的穩定性和快速、無超調、準確定位的優良動態品質.為剖析該設計方法的控制效果，本文作了對比性研究，並將該設計方法用於工業試驗中，取得了滿意的結果
  3. Do some necessary calculations and decide on the general scheme of compton back - scattering imaging scanner to the real wall inspection. include the selection of radioactive source, the calculation of compton back - scattering beam, the calculation of the basic condition of finding out the different materials and the determination of some important parameters as well. 3

    其主要內容包括入射源的選擇，散射粒子的理論計算，發現異物的最低條件計算以及系統的一些重要參數的確定，主要包括：放射源的選擇，散射角的確定，后準直器的形狀與尺寸，前準直器的尺寸，前準直孔的大小，檢測器的種類與型號，檢測器的效率等。
  4. Moreover, compensated for aberration of ball lens by designing phase compensating plate to get a higher energy utilization rate. third, combining with the light beam property of dwdm system, put forward taking fresnel lens array as fiber arrayed collimator, designed differently structured lens array and discovered the arrayed collimator loss property, which compared with the existing parameter of fiber collimator, embodies many advantages as arrayed collimator

    結合密集波分復用系統的光束耦合特點，提出用菲涅爾透鏡列陣做光纖陣列準直器，並設計不同結構的透鏡列陣，得出了該陣列準直器的光束耦合損耗特徵，與現有的光纖準直器的參數相比，體現出用菲涅爾透鏡列陣作陣列光纖準直器的諸多優勢。
  5. Fpga and dvb standard are introduced firstly, dvb - c standard and composition of its system are analyzed completely, development of modulator structure and dvb - c digital modulator composition are presented, more over, analysis of respective modular are given. then, principle of dvb - c digital modulator system are presented, they are error control technique 、 mqam 、 nyquist rule and root raised cosine filter 、 window design method for fir filter 、 multi - rate signal processing ( integer interpolating, conversion of fractional sampling, equal conversion of net structure, polyphase structure for filter, poly - phase structure for interpolator, multi - stage implementation of samplying conversion ) 、 distrubited algorithm 、 cic filter 、 dds 、 cordic algorithm

    接著，專門利用一個章節闡述了dvb - c前端調制系統原理，他們了差錯控制技術、多進制調制（ mqam ） 、 nyquist準則與平方根升餘弦濾波器、有限沖擊響應濾波器的窗函數設計法、多抽樣率信號處理包括（整數倍內插原理、分數倍抽樣率轉換、網路結構的等效結構、濾波器的多相表示、內插器的多相表示、抽樣率轉換的多級實現） 、分散式演算法、 cic濾波器、直接數字頻率合成（ dds ） 、 cordic演算法。
  6. The position and size of the monochromator, focusing curvature radii and tilting angles of the germanium focusing monochromator under different different take - off angle, size and divergency of the second collimator and intensity loss due to the use of it were determined. the neutron flux at different wavelength, under different reflection and take - off angle of the monochromator and divergency of the first collimator, were given. the simulation on the aperture used for limiting beam size in front of the sample showed that, smaller the size of the aperture and further the distance from the aperture to the sample, greater the loss of the intensity and more serious the spread of the beam along vertical direction at the sample position which makes the practical sampling volume greater than expected

    用蒙特卡羅模擬方法對中子應力衍射譜儀的設計方案進行了優化研究，提出了一系列可供參考的數據：確定了單色器的位置、尺寸、垂直聚焦單色器在不同起飛角下的聚焦曲率半徑和傾角；討論了第二準直器的尺寸和發散，以及使用第二準直器造成的強度損失；給出了在不同單色器反射面、起飛角、中子波長和第一準直器發散度的情況下樣品處的中子注量率，以及多種組合情況下譜儀的解析度曲線；對限束方孔的尺寸、距離樣品遠近對強度損失和測量中的影響做了深入研究。
  7. Through the theory of light radiation and intensity, we can use the fewest leds to satisfy the luminous intensity demand. through image segmentation theory, we can accurately pick module up from the test stripe when it is put in wrong directions. through image processing theory, we can acquire correct information and avoid the bad effects from the asymmetric chemistry reaction and instability of the devices

    用光的輻射和強度理論，我們計算出了獲得足夠圖像強度所需的最少光源;用圖像分割理論，我們在試紙條傾斜放置或有垂直方向上的偏移時，準確地提取出了各模塊的數據;用平滑濾波和均值濾波理論，我們濾除了由於反應不均勻及硬體設備不穩定帶來的噪聲;用交遇區設計線性分類器的方法，我們降低了有限樣本設計線性分類器帶來的誤差，提高了檢驗準確度。
  8. During the circuit design, the author analyzed the basic principle of the direct current motor, pwm control, h - bridge power driver, and two control techniques of h - bridge power drive circuit, designed its general structure, so the feasibility of the design is confirmed. then, reference, oscillator, power dmos gate drive circuit ( charge pump, bootstrap ), and dead time generation circuit are designed and analyzed in the sub - circuits. a current - controlled oscillator is presented in this thesis

    在電路設計中，作者介紹了直流電機的工作原理和數學模型、脈寬調制（ pwm ）控制原理、 h橋電路基本原理和h橋功率驅動電路的兩種控制模式，設計了驅動電路的總體結構，給出了電路的功能模塊，確定了設計的可行性，然後在子電路模塊中，重點分析設計了基準源電路、振蕩器電路、高端功率管柵驅動電路（電荷泵及自舉電路） 、低端功率管柵驅動電路和死區時間產生電路。
  9. The correlative items of dc filters are researched on the basis of gezhouba - shanghai hvdc transmission project. in the analysis the three - pulse model is used to simulate converter, which takes into account the impact of the stray capacitance. the harmonics distribution on dc lines is simulated accurately, especially the harmonic ignored in old models

    本文以葛上直流輸電工程為基礎，研究直流濾波器設計中的相關問題，採用考慮了雜散電容的三脈動模型來建立換流站模型，更為準確地模擬出直流輸電線路上的諧波分佈情況，尤其是模擬出舊模型中忽略的次（為自然數）諧波，為直流濾波器的設計提供了更精確的數據和判斷依據。
  10. In this paper, they are set forth at first that the kinds of computer - simulation of electronic devices, the development and the requirements of mosfet ' s model and the way of gain the models " parameters, the dc models have been bui it in chapter 2 and the models of big signals have been deduced in chapter 3, they are different from the equivalent circuit models in the traditional software pspice that they come from the numer i ca i - s i mu i at i on wh i ch is based on the essence equat i on, so the precision of simulation is enhanced ? mosfet ' s small signal models of low frequency, intermediate frequency and high frequency have been built in chapter 4 and chapter 5, although the equivalent circuit models in pspice are used for reference to bui id them, they have their own characteristics which are analyzed at a i i kinds of situations, so that the simulation software for mosfet can be written according them and it i s a i so benef i c i a i for us to catch the gen i us character i st i cs of mosfet and to d esign all kinds of applicable devices the correctness of the models is simply proved in chapter 6

    本文首先介紹了電子器件計算機模擬的分類、 mosfet的建模發展動態、對器件模型的要求以及模型參數的提取方法。在第二章中建立了mos晶體管在直流端電壓條件下的工作模型；第三章推導了mosfet的大信號模型，這兩類模型不同於傳統模擬軟體例如pspice中的等效電路模型，而是從模型方程出發，採用數值模擬的方法，提高了模擬的精度。第四章和第五章分別建立了mos晶體管低頻、中頻、高頻的小信號模型，雖然借鑒了pspice模擬軟體中用等效電路模型的方法，但是本文分別討論了準靜態和非準靜態時器件的本徵部分以及包含非本徵部分工作于低頻、中頻和高頻條件時的模型，可以根據這些模型編寫相應的模擬軟體，這樣在做器件的模擬分析與器件設計的時候，就可以利用模擬軟體逐步深入地分析器件在不同的條件下和器件的不同部分在工作時的各種小信號特性，有利於抓住器件工作的本質特性，設計出符合要求的各類通用和特殊器件。
  11. The operation principle of the aviation static inverter with high frequency pulse dc link is discussed, and the design criterions of the key circuit parameters are gained

    本文論述了高頻脈沖直流環節航空靜止變流器的工作原理，獲得了關鍵電路參數設計準則。
  12. Initial recovery voltage and peak recovery voltage across the circuit - breaker have an essential affect on re - strike. for assessing performance of circuit - breaker, the higher inductance and lower inductance must be considered at the same time when testing according to theoretic analysis, the directly test circuit on switching the no - load overhead by high - voltage circuit breakers of rated voltage 252kv and below, in compliance with the correlative standard jb5871 and the test devices, and the test circuit parameters have been calculated and the many testes have been carried out

    在理論分析的基礎上，考慮實驗室現有設備的情況依據標準jb5871的規定，選用合適的試驗設備，對試驗線路的參數進行計算，在實驗室建立了252kv及以下電壓等級斷路器開合線路充電電流直接試驗線路，利用該線路進行了數臺產品的試驗，分析了試驗結果，並根據試驗結果和理論基礎討論了gb t1984 - 200 《交流高壓斷路器》 （報批稿）關于開合線路充電電流試驗的有關規定。
  13. The signal testing unit examines directly the production parameter - the belt " s velocity and sends out electrical signal similar to sine wave. the signal handling and analyzing unit disposes of the sensor " s output signal by amplifying, plasticisering a / d transforming and measuring and displays it digitally. after the alarming and controlling unit compares the testing signal with the standard one and analyses, it will show the normal production situation or alarm at the abnormal state and control the related equipments if it is necessary

    信號檢測單元直接檢測皮帶速度，並輸出近似正弦波的電信號：信號處理與分析單元對傳感器輸出信號進行放大、整形、 a d轉換和計算等處理，並進行數字顯示；預警、報警、控制單元將信號與標準信號進行比較，經分析后顯示正常狀態或對異常狀態進行聲、光預警、報警。
  14. In modern aircraft design, there is an urgent requirement for accurate, efficient and easy - to - use numerical analysis tools. for this purpose, this thesis introduces recent progress in the generation and application of cartesian grid with tree data structure and adaptive refinement. coupled with hybrid grid techniques, euler and navier - stokes equations are solved

    本文針對現代飛行器設計中對實用、高效、準確的氣動力分析工具的迫切需求，基於叉樹數據結構，發展了一種自適應直角切割網格方法，採用混合網格技術，實現了對流場euler和navier - stokes方程的計算求解，進一步完成了復雜增升裝置繞流和外掛物分離投放非定常流場的數值模擬。
  15. Accurate calculation of aircraft steady and unsteady aerodynamics and flutter characteristics, especially in the transonic speed range is a crucial problem for aircraft designers. it is very important for us to develop an efficient, accurate, robust navier - stokes / euler flow solver that could be used to study transonic steady and unsteady flowfields

    飛行器的定常和非定常氣動力的準確數值求解及顫振特性研究，特別是跨音速范圍內的準確數值求解及研究，一直以來都是飛行器設計工作者必須面對的重要研究難題。
  16. Aim at the development of the software radio in generalization, standardization and modularization, a waveform synthesis solution based on direct digital frequency synthesis is developed

    針對國內外軟體無線電技術對通用、標準、模塊化的硬體平臺的需求，本文提出了一種基於直接數字頻率合成原理進行信號數字域調制的波形合成器設計方案。
  17. Accurately predicting the pressure drop, which has been attracting the attention of many researchers for several decades, is very important when designing or optimizing the operation of a venturi scrubber

    摘要在進行文丘里洗滌器設計或結構優化時，準確地預測其壓力損失數值大小非常重要，多年來一直受到眾多研究者的關注。
  18. Intelligent tri - phase ac active reactive power instrument adopt advanced microprocessor carry out smart control, and to the inputed tri - phase ac voltage and current signal carry out accurate measurement, through cpu automatically count out the tri - phase ac active reactive power value total power, conduct clear and visual display by high brightness led display tube, it can be simultaneously transferred to standard voltage current signal to transmit output, and have super - limit control alarm standard serial communication function etc

    智能三相交流有功無功功率儀表採用先進的微處理器進行智能控制，對輸入的三相交流電壓與電流信號進行精確的測量，經過cpu自動計算出三相交流有功無功功率值總功率，由高亮度led數碼管進行清晰直觀的顯示，同時可轉換成標準電壓電流信號變送輸出，並具有超限控制報警標準串列通訊等功能。
  19. The displacement device has two kind of power supply, dc and ac, which can insure the stability and adaptability in field application. mc1404b counter chip responding for accurate signal replacement was set in the internal circuit. the display component adopts the 7135 led display circuit with common cathode

    測量儀採用交直流兩種形式供電，這樣既方便現場的使用又可以保證電源供電的穩定性，其內部電路中採用mc1404b計數器晶元，能夠準確的進行復位調零功能，顯示部分採用7135共陰極led的顯示電路，這種晶元精度高、解析度高、能準確檢出極性。
  20. In practical level, the paper puts forward some proposes, such as " using dynamic geometry software ", " extending curriculum ' s extent ", " integrating visual geometry ", " using pattern in algebraic teaching ", " popularizing shape calculator ", " turning teacher ' s teaching concept ", and so on. in theoretical level, the paper puts forward " one base, two bases, four emphases " for our country ' s mathematics curriculum reform. namely, the reform should be based on dialectical materialism, carrying forward the fine traditions of " two bases " and " basic ability ", paying attention to students " emotion and discovering process, integration of technology, the contact between mathematics study and life a, pluralistic evaluate

    在操作層面，關于「空間與圖形」內容標準提出「動態幾何軟體的應用」 、 「擴大課程的廣度」和「直觀幾何的整合」的建議，關于「數與代數」標準提出「模式的引入」和「圖形計算器的推廣」的建議，關于「統計與概率」標準提出「數學分支的整合」 、 「轉變教師的教學觀念」和「計算工具的使用」的建議；在理論探索層面，提出「一個基礎，兩個基本點，四個注重」的改革思路，即：以辯證唯物主義為哲學基礎，發揚「雙基」和「基本能力」培養的傳統優勢，注重學生的情感體驗和發現過程，注重技術與數學教學的整合，注重數學學習與學生生活空間的聯系，注重評價方式的多元化。
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