evm 中文意思是什麼

evm 解釋
幅度
  1. In this equipment, a mcu controller is responsible for digital image acquisition, realized stable data transmission between different running frequency units. the whole algorithm is simulated and optimized on dsp evm board and ccs environment, which contribute to a seamless software transplant and hardware structure design

    通過中斷機制，實現數據的可靠傳輸，在dspevm板環境下，對演算法程序進行優化和比較，完成演算法模擬測試，實現軟體無縫移植和硬體的結構化設計。
  2. The carrier wave is modulated directly by the baseband signal at several frequency point in l band and s band. firstly, this paper clarifies the theory of i / q modulation, elaborates evm and acpl, and analyzes the effect of amplitude and phase unbalance and dc offset on evm. secondly we review the basic principle of phase locked loop and it ’ s composing parts, including the basic conception and design method of pll frequency synthesizer, especially introduce the charge pump pll frequency synthesizer in detail

    首先，在闡述i / q正交調制基本原理的基礎上，通過對誤差矢量和鄰近通道功率泄漏的詳細分析，定性、定量地討論了各種非理想電路因素（如相位不平衡、幅度不平衡、直流偏差等）對調制器性能的影響;其次，介紹了鎖相環的工作原理和基本組成部分，包括鎖相環的設計和環路濾波器的設計，特別詳述了電荷泵鎖相頻率源;第三，介紹了採用直接調制技術模擬衛星信號的射頻前端的設計;最後，對整個直接射頻調制系統進行測試，結果基本上達到了課題要求。
  3. Digital signal processor ( dsp ) combined with repm bldcm, which build up a dc adjustable speed system, achieve to control multiple motor speed, positive and negative rotate, protect and fault exemine by a true single chip. design and present a electromagnetism scheme of repm bldcm used in electromotion chair drive system. select electronical components and chips in the drive board by contrast with variant drive mode. design the drive board principle picture, make a drive board pcb and debug it. design a principle picture with dsp core. workout the motor control code introduced popular programme modle. test the programme reliability and control performance by linking tms320lf2407 evm, pc, drive borad and the bldcm. the bldcm swatch is prepare experiment

    本論文闡述了方波驅動稀土永磁無刷直流電動機的原理及數學模型；設計並給出了一種電動座椅用稀土永磁無刷直流電動機的電磁設計方案；對電機採用何種驅動方式進行了對比分析；對驅動電路進行了元器件選型、原理圖設計、制板及調試；有針對性的闡述了dsp在本系統應用中所涉及到的功能模塊；設計了以dsp為核心的控制電路原理圖；以模塊化的軟體編程思想編制了電機控制軟體；通過tms320lf2407目標板、上位機、驅動板及電機的聯調，證明了系統可行。
  4. Considering the developmental trend of the video compress and the demands of the people, this paper makes researches on the visual section of the mpeg - 4 standard, present an amendment to the ds search algorithm, and does some optimization to the module of compress which is utilized frequently by the encoder so that the encoder can accomplish real - time compression on adsp - blackfin535 evm board to the cif picture, the size of which is 352 by 288

    因此，研究mpeg - 4視頻編碼標準並實現實時編解碼具有重要意義，特別是在圖像質量和實時性方面要求都很高的場合，例如電視會議、視頻電話和iptv等。本文結合這種需求和趨勢，研究了mpeg - 4sp編碼原理，改進了ds演算法。通過內存優化、結構優化和匯編級優化，最終實現了編碼器在adsp - blackfin535評估板上的實時編碼。
  5. At the situation that the computer information system project builds at present, the paper mainly sets forth the management evm ( earned value management ) method specifically in the computer information system project built at present

    摘要本文針對目前計算機信息系統項目建設的現狀，闡述了在計算機信息系統集成項目建設中為了控製成本所採用的掙值管理方法。
  6. Evm measurement algorithm for td - scdma ue conformance test based on iterative process

    基於迭代的時分同步碼分多址系統終端誤差矢量值一致性測試演算法
  7. These activities consume project resources and should be included in evm planning and measurement

    但這些活動也消耗了項目資源，所以理應當包括在贏得值管理中加以計劃和測定。
  8. In this thesis, we achieve a test - bed of motion control based on dsp using tms320f240 evm, xds510 emulator, pc, ac servo driver, ac permanent magnet synchronic servo motor and two direction graph plotter etc. the thesis analyzes the influence that the dynamic characteristic and the change of parameter of the system cause contour error of the system, then adopts fuzzy adaptive pid control method, single neural cell pid control method and fuzzy - neural network control method, and introduces the influence that the control methods lead to dynamic characteristic and contour error of the system. finally some useful results are obtained by analyzing and comparing the control methods, and it is possible to make the combination of advanced control methods and high efficiency of dsp

    在此基礎上，分析了系統的動態特性和參數變化對系統輪廓誤差的影響，先後採用了模糊自適應pid控制策略、單神經元pid控制策略以及模糊神經網路控制策略，並詳細分析和比較了這幾種控制策略對系統的動態特性和輪廓誤差的影響，得出了一些有用的結論，以使先進的控制策略和dsp的高效數據處理能力的結合成為可能。
  9. This system uses the evm of dual - core tms320vc5471. for the different core configuration, the dsp has a / d and d / a modules to implement speech signal i / o channel, real time implementation of speech coder. meanwhile embedded operation system uclinux is transplanted into it

    結合cpu兩個內核不同的體系結構，在dsp內核上連接a / d 、 d / a模塊實現語音信號i / o通道以及實時實現語音編解碼演算法，在arm內核上移植了clinux嵌入式操作系統。
  10. The algorithm is implemented and simulated using matlab and dsp evm board

    同時還分別在matlab和dspevm板上對演算法進行了軟模擬和硬模擬。
  11. Compare the result, study the method how to test the algorithm based on pc and evm

    Dsp系統的實時性要從硬體設計和軟體演算法優化兩方面進行保證。
  12. As for hardware, tms320f240 is the control unit. a piece of digital signal board and analog signal board based on evm board of tms320f240 are designed

    在硬體方面，以tms320f240型dsp為控制器，基於其evm板分別擴展數字介面和模擬介面。
  13. We studied four eddy viscosity models ( evm ) and three nonlinear easm models in detail. the two - equation turbulence models are validated through simulating the flow fields over flat plate, airfoils and onera m6 wing. the capabilities of different turbulence models are accessed in this study

    加入兩方程湍流模型后，通過對平板、翼型、 oneram6機翼等繞流流場的數值計算，驗證了加入的各湍流模型的準確性，測試了它們對不同湍流流場的預測能力。
  14. 5. otherwise, the paper is concerned with / introduces the property and application of the new float dsp chip tms320c6701, the structure of tms320c6701 evm board and the software code composer studio ( ccs ). the algorithms mentioned above are testified on the board

    5 .此外，本文還介紹了美國ti公司的新一代浮點dsp晶元tms320c6701的一些特點與應用，以及tms320c6701evm板的結構特點和軟體開發環境ccs ，本文所研究的演算法均在tms320c6701evm板上通過了驗證。
  15. This dissertation mainly introduces away of automatic recognition of modulation signals based on decision theory and brings forward three solutions. we adopt the first solution and discuss how to emulate the recognition algorithm on dsp2549 evm and the application of modulation recognition

    本論文主要介紹一種基於決策理論的信號調制樣式自動識別方法，提出了三種實現方案，採用了最佳方案第一種方案，深入探討了如何在dsp2549evm評估系統中實現模擬。
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