modulated speed 中文意思是什麼

modulated speed 解釋
適度的緩速
  • modulated : 改變了的
  • speed : n 1 快，迅速。2 速率，速度。3 （汽車的）變速器，排擋。4 （膠片，照相紙）感光速度。5 〈古語〉興隆...
  1. The group velocity is the speed at which modulated signals would be transmitted.

    群速度就是將調制信號發送出去的速度。
  2. In order to improve the existing pr adaptive optical heterodyne detection system ( praohds ), a new praohds is proposed based on sppc and mppc coexistence. the experimental study of the system is completed by equal amplitude ar + laser beams, poorly coherent equal amplitude solid - state laser beams and high speed amplitude - modulated solid - state laser beams through distorting media. experimental results indicate that the new system is applicable

    為了改進現有的光折變自適應光外差探測系統（ praohds ） ，本文利用sppc和mppc同時共存的特性，提出了一種新型的praohds ，並利用ar ~ +等幅激光、相干性較差的固體等幅激光以及固體高速振幅調制激光對新系統進行了畸變光束的自適應光外差探測實驗研究，結果證明了新系統在實際應用中的可行性。
  3. There are five parts are as follows : in part one, the concept of switching function is introduced first to establish the nonlinear mathematical model of the induction motor variable frequency speed adjustment system which is fed by a sine pulse width modulated ( spwm ) inverter and takes the effect of the main magnetic circuit saturation into consideration, then the low frequency oscillation of the system is simulated according to the model. next, from the view point of energy conversion of the inverter - induction system, a criterion for the low frequency oscillation is proposed to determine whether the system is in low frequency oscillation which is judged by whether the interval of the negative current component of the inverter input current is more than 1 / fc ( fc is the carrier wave frequency of the inverter ) or not

    首先引入開關函數概念，建立了正弦脈寬調制（ spwm ）逆變器供電異步電動機，考慮主磁路飽和時的變頻調速系統整體數學模型，模擬系統的低頻振蕩；其次從逆變器-異步電動機系統能量轉換角度出發，提出通過檢測逆變器輸入電流中負電流的間隔時間是否大於1 / f _ c （ f _ c為逆變器載波頻率）來判定系統是否出現低頻振蕩；最後的實驗結果驗證了系統低頻振蕩建模和判據的實用性和正確性。
  4. This article analyses the signal characteristics of several typical cw radars, and presents the principle and application of doppler radar. as one focal point, this article researches the generation and math characteristics of pseudorandom code modulated signal, analyses the spectrum of pseudorandom code phase modulation radar signal, and presents this kind of signal ' s application in distance and speed measurement. this article also researches the application of mono - pulse amplitude comparison radar in angle measurement finally, this article elaborates the working process of crs in uast

    本文分析了幾種典型的連續波雷達信號的特性，介紹了多普勒雷達的原理和應用；研究了偽隨機編碼信號的產生和數學特徵，著重分析了偽碼調相連續波雷達信號的頻譜，及其在雷達測距、測速方面的應用；研究了單脈沖幅度比較體制在雷達測角中的應用；最後，闡述了超近反導系統中復合體制雷達的工作過程。
  5. However, the paralleling communication can meet the requirements of high speed and fidelity in underwater signal transmissions. ofdm is a kind of novel paralleling transmission technology. the principle of ofdm is that the whole bandwidth can be divided into some subchannels, the high - speed serial signal stream is modulated by some orthogonal subcarriers

    正交頻分復用（ ofdm ）是近年來數字通信中流行的一種并行傳輸新技術，其核心思想是將整個可用頻帶分割成多個正交子通道，將待傳輸的高速串列碼流并行的調制在這些子通道載波上。
  6. In high - speed direct optical modulation of laser diodes, the frequency chirp of the modulated signal cannot be eliminated. then the optical external modulators play more and more important role in large capacity optical transmission systems, and have become a subject of intense study

    在高速光調制中，直接調制引起的啁啾噪聲難以克服，光外調制器在大容量光纖傳輸系統中，扮演著越來越重要的角色，成為當前的研究熱點。
  7. Variable frequency speed regulation system based on the voltage space - vector is researched in this paper, the principle of the voltage space - vector is presented, and the third part " s software strategy of voltage space - vector is analyzed, the method of the third part " s software of voltage space - vector is imitated with simulink. at the same time, the duty time and duty order of the two zero - vector are analyzed and showed that the voltage space - vector pwm is actually a modulated method by adding the harmonic to the sine wave

    本文對基於空間電壓矢量的變頻調速系統進行了研究，敘述了空間電壓矢量的原理，對ti公司第三方軟體的對稱空間電壓矢量的演算法進行了分析，並用simulink對該方法進行了模擬，對兩個零矢量的作用時間和作用順序進行了分析，指出空間電壓矢量pwm實質上是一種諧波注入的調制方法。
  8. This paper focus on these problems and discusses the possibility of using pseudo - random code phase modulated ( prcpm ) technology in measuring high speed target. at first the basic principle of the m series is given, then a doppler pretreatment method is given

    首先介紹了m序列編碼基本理論，然後給出了m序列調相雷達多普勒預處理的方法，該方法充分利用了m序列的移位相乘后仍為m序列的特性，並且將該方法擴展到一般的二相碼序列。
  9. A new pattern position sensitive detector is introduced, so the accelerometer has many advantages including high sensitivity, high resolution and quick response speed. a binary width - modulated pulse rebalance loop is applied in the accelerometer

    該加速度計引入了新型位置敏感探測器psd ，使其具有高的靈敏度、解析度和響應速度;同時採取了二元調寬脈沖加矩方式的再平衡迴路。
  10. This thesis expounds fundamental principle and realization technique of artificial neural network and genetic algorithm, and redacts artificial neural network procedures. - ( l ) adopting batch processing high - speed algorithm, the thesis redacts back - propagation network procedure to enchance training velocity, in which learning rate and momentum parameters are modulated self - adaptably during error correction

    本文闡述了人工神經網路和遺傳演算法的基本原理及實現技術，並在此基礎上利用matlab5 . 3編寫了人工神經網路程序： （ 1 ）編寫了bp人工神經網路程序，採用vogl 「批處理」快速演算法，學習速率、動量參數在誤差修正過程中自適應調節，提高了訓練的速度。
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