計算速率 的英文怎麼說

中文拼音 [jìsuànsùlǜ]
計算速率 英文
computation rate
  • 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...
  • 算 : Ⅰ動詞1 （計算數目） calculate; reckon; compute; figure 2 （計算進去） include; count 3 （謀劃;計...
  • 速 : Ⅰ形容詞（迅速; 快） fast; rapid; quick; speedy Ⅱ名詞1 （速度） speed; velocity 2 （姓氏） a surna...
  • 率 : 率名詞（比值） rate; ratio; proportion
  • 計算 : 1 （求得未知數） count; compute; calculate; reckon; enumerate 2 （考慮; 籌劃） consideration; pla...
  • 速率 : speed; rate; tempo
  1. This dissertation uses genetic algorithm to choose optimum parameters for the widely used pid controllers. in the optimization calculation process, mutation rate, cross rate and parameter range are adaptively changed to accelerate optimization process

    本文用遺傳演算法優化工程中廣泛使用的pid控制器的參數，採用變參數區間、變交叉變異概率等方法提高計算速度，並對適應值函數進行了改進。
  2. A highly efficient numerical algorithm by using multi - grid method ( mgm ) is introduced to solve the three dimensional field distribution in the present paper. formulae of the restriction and prolongation in mgm computation is deduced, and a 3d program of mgm is accomplished, which can solve the field distributions in electron optical systems for various electrostatic lenses. the 3d field distribution in an electrostatic concentric spherical model is tested with mgm algorithm and an algorithm based on finite difference method ( fdm ) respectively. comparing these two results in view of computational efficiency and computational accuracy, it appears that mgm is superior to fdm in solving electrostatic field distribution for the electron optics problem. this paper shows that the 3d field computation using mgm greatly improves the computational efficiency of field distributions in electron optical systems and shortens the computational time

    本文將一種高效率的數值計算方法? ?多重網格法引入三維靜電場分佈的計算，多重網格法利用限制和延拓可迅速求得滿足精度要求的場分佈.研究了求解各種靜電透鏡電子光學系統三維場分佈的多重網格法程序，驗算了靜電同心球模型的三維場分佈.通過與目前在場計算中常用的有限差分法進行比較，可以看出多重網格法的計算效率和計算精度優于有限差分法.本文表明利用多重網格法計算三維場大大提高了場分佈的計算效率，縮短了計算時間，因此為后續計算打下了良好的基礎
  3. In order to improve the efficiency of classification based on feature matching, the method of azimuth estimation from sar image is studied. a method of target ' s azimuth estimation from sar image using peak featur e based on linear regression is proposed, besides goodish estimation accuracy and high computation efficiency, it can also provide the confidence interval of the estimation, which can meet the need of model - based sar atr system that uses feature very well

    為了提高基於特徵匹配的saratr系統的分類效率，論文進一步研究了sar圖像目標方位角估計方法，提出了一種利用峰值特徵基於線性回歸的sar目標方位角估計方法，該方法除了具有計算速度快、估計精度較高的特點之外，還能在估計方位角的同時，給出該估計的置信區間，從而能更好地滿足利用特徵基於模型saratr系統的需要。
  4. The results also show that saastamoinen / niell model can remove the most of the tropospheric delay, and then significantly improve the success rate and the reliability of ambiguity resolution. 4

    結果顯示，不論在模糊度解算的成功率和可靠性上，還是在計算速度上，加權最小二乘法都優于kalman濾波。
  5. Based on the correct evaluation of the means and covariance of the measurement error in cartesian coordinate system, the algorithm processes the radar measurements sequentially, and the linearization of measurement equation is no longer neccessary

    作者推導了有測速數據時的去偏轉換卡爾曼濾波演算法。此演算法估計精度和計算效率比以前的方法有較大改善，對測量方程不做近似處理。
  6. The signal process function of the software include these function : digital filter, windowing, auto - correlation function and cross - correlation function, mean and variance, probability density function and probability distribution function statistic ; auto - power spectrum, cross - power spectrum, frequency response function, coherence function, cepstrum analysis based on fft ( fast fourier transfer ) ; joint time - frequency analysis based on stft ( short - time fourier transfer )

    軟體的處理功能包括：數字濾波、時域加窗、自相關與互相關處理、均值和方差計算、概率密度和概率分佈函數計算；在快速傅立葉變換（ fft ）基礎上計算自功率譜、互功率譜、頻率響應函數、相干函數、倒頻譜分析；基於短時傅立葉變換（ stft ）的聯合時頻分析等。
  7. An algorithm based on the inner structural feature of the 8 - bit single chip microprocessor is presented to perform the space vector modulation, it is high efficiency in voltage - utilizing, low harmonic losses, fast in calculation speed, simple in over - modulation method, high ratio of capability to price

    介紹一種用8位專用單片機內部結構特徵而設計的空間矢量調制演算法，不但具有電壓利用率高、諧波損耗小等優點，還具有計算速度快、過調制處理方法簡潔、性能價格比高等優點。
  8. With the merit of fast speed and high efficiency, this kind of method could pioneer the way for arbitrary shape

    這種方法計算速度快、效率高並可以搜索出任意形狀的滑動面。
  9. A approximate algorithm is presented by which satisfactory results of two dimensional optimal layout belonged to np complete problems can be obtained efficiently and rapidly

    摘要針對理論上屬于np完全問題的二維矩形件優化排樣問題，構建了一個排樣效率高、計算速度快和排樣效果好的一種近似演算法。
  10. Compared with the conventional finite - difference method on the fixed grid - size rectangular grids, the new method can be more cost - effective in complex models. numerical tests for both seismic modeling and reverse - time migration are performed on various theoretical models and a physical experiment

    用該剖分方法得到的網格在各速度層內的空間步長是不同的，而全區域上的時間步長卻近於恆定，因此在復雜模型上，本文方法的計算效率要高於傳統的矩形網格差分方法。
  11. Israeli scientists have built a dna computer so tiny that a trillion of them could fit in a test tube and perform a billion operations per second with 99. 8 percent accuracy

    近日以色列科學家成功研製出超微dna計算機，這種計算機雖然只有普通試管的萬億分之一大小，運算速率卻達到每秒10億次，且準確率高達99 . 8 。
  12. ( 2 ) this paper presents some basic theory about wavelet analysis, and proposes a fast wavelet ( packet ) algorithm based on sliding window. by storing the part of wavelet packet coefficients in memory in advance, we avoid repeating calculation and gain a fast wavelet algorithm at the cost of increasing some storage space

    （ 2 ）本文介紹了小波分析的一些基本理論，提出了一種基於滑動時窗的小波（包）快速演算法，通過預先存儲一部分小波（包）系數，避免重復計算過程，可以用較小的存儲空間為代價，獲得了計算效率很高的小波（包）變換快速演算法。
  13. But the nnd algorithm can " t reach 2 - order precision, and the cell - centred finite volume algorithm is not suit to solve hypersonic problem. for the efficiency of the four - stage runge - kutta time - stepping scheme is low, and the robust is bad for the hypersonic problem, an implicit time - stepping scheme is adopted. this scheme can preserve the results precision and improve the computing efficiency sharply, and is an innovation for the time - stepping scheme of unstructured grid

    為了解決目前傳統四步龍格一庫塔時間推進效率較低、計算高超聲速流場時魯棒性較差的問題，本文改進並採用了一種隱式時間推進格式，能夠在保證精度要求的情況下有效的提高流場計算時的計算效率，對基於非結構網格的時間推進格式有了發展和創新。
  14. But this method can ’ t be used to generate tool - path for the kind of surfaces whose curvature varies sharply, since singularity may appear when creating the offset surface. it is computation expensive to resolve the singularity

    但曲率變化大的曲面在生成等距面時發生自交，曲面的自交處理計算復雜，降低了基於等距面的刀具軌跡計算速度。
  15. Author, secondly, starts from the approximate expandness of square root operator, perform mathematical calculations for finite difference operator in frequency - space domain, fourier finite difference operator in mixing domain ( frequency - space and frequency - wavenumber domain ) and general screen operator in mixing domain, compare and discuss their precision of their wavefield, adaptability for lateral velocity variations, computation efficiency and stability. thirdly, author, applies the steady variational reference slowness rytov approximation general screen wavefield extrapolation operator ( vrselrf ) in frequency - wavenumber domain, to the prestack and poststack forward modeling and depth migration

    第二，從平方根運算元的近似展開出發對頻率?空間域的有限差分運算元、混合域（頻率?空間域；頻率?波數域）的fourier有限差分運算元、混合域的廣義屏運算元進行了推導並對其波場描述精度、對橫向變速的適應性、計算效率和穩定性進行了比較與評述。
  16. At the same time, as more and more radio sources have been set up, electromagnetic pollution in urban area becomes more serious, which is harmful to people ' s healthy and communication system so it is necessary to simulate the electromagnetic propagation in urban area by computer being an approximate hf method in evaluating em scattering ， the complex ray method （ crm ） is valuable in actual applications ， mainly benefited from its simple physical model ， convenient mathematical formulation and computational efficiency, especially with the scenes of scattering from complex objects based on the condition mentioned above, a hybrid ray model of the urban area electromagnetic wave propagation prediction was established with the foundation of ray tracing theory and complex ray theory

    復射線技術作為一種求解波場問題的高頻近似方法，由於其具有物理模型簡單、數學處理方便、計算效率高等優點，在復雜的目標散射特性分析等應用領域中有著重要的應用價值。基於以上的情況，本文在射線追蹤理論和復射線理論的基礎上，為城區環境建立了混合射線預測模型。本文採用橢圓模型對已有的射線追蹤方法進行加速，並將復射線理論應用到城區環境電波傳播預測中，提出新的預測方法混合射線方法。
  17. In this thesis, genetic algorithm ( ga ) is used to solve aeroengine nonlinear model problems at first time, fast ga and ga application meathods are studied, the main work and the conclusion of the thesis are summarized as follows : 1

    本文首次將遺傳演算法應用於發動機非線性數學模型，首先針對遺傳演算法計算效率差的不足，進行快速遺傳演算法研究；然後深入分析了遺傳演算法在發動機數學模型應用中的實現技術。論文完成的主要工作與結論如下： 1
  18. The coarse grids are obtained by agglomerating the fine grids. the solution of coarse grids is driven by the fine grids " residue, and the solution on the coarse grids is used to correct the solution on the fine grids, which can eliminated all parts of frequency errors on the fine grids

    粗網格上的解由細網格上的殘值來驅動，粗網格上的解對細網格上的解進行修正，這樣就能較快地消除細網格上解的高低頻誤差，加速解的收斂，提高計算效率。
  19. Furthermore, performance of fft arithmetic and dsp + dsp, double cpus, hardware structure have improved computational speed and measure precision of the monitoring system. in the protection system, the iniegrated dft arithmetic enhances the accuracy and reliability of protection execution. by communication several devices can run online to be cofltfolled dispersedly and managed centrally

    測控部分率先實現了底層裝置128點快速傅立葉演算法（ fft ） ，提高了計算速度和計量精度；保護部分採用24點離散傅立葉演算法（ dft ） ，增加了保護動作的準確性和可靠性；通過通訊可實現多臺裝置聯網運行，做到「分散控制、集中管理」 。
  20. The recursive criterion of transient current protection based on mallat wavelet transform is presented in order to meet the real - time demands. the reserch shows deficiency existed in the prevenient principle of transient current protection, so a new improved scheme of transient current protection is proposed. the characteristics of transient protection at different bus distribution capacitance is also analysed in this thesis. the study shows that operate of transient protection is correct when the bus distribution capacitance change. other conclusion include : the trip of transient protection must be locked when the power circuit breaker of transimission line operated, because the trip is incorrect at this time ; the features of transient current and it ' s energy is different between the fault and thunder over - voltage in transimission line, and them can be identified ; the ratio of high frequency component of current in serise capaciters compensation line, svc and hvdc system is far little than fault transient current, so all of them do not affect the working of trasient current protection

    應用功率譜估計方法討論了故障高頻暫態噪聲信號在頻率軸上的分佈情況，利用功率譜分析結果實現的非參數化系統辨識方法研究了母線分佈電容對電流高頻暫態信號的衰減特性。論文的後半部分（第五，六，七章）著重分析了現有基於故障電流的暫態保護原理和判據存在的問題，提出了新的實現方案，並討論了暫態電流保護的運行性能。利用多分辨分析和小波分解快速演算法構成的遞推暫態保護判據，可以準確區分故障線路和非故障線路，實現超高速暫態電流保護，計算更為簡單方便，計算速度更快。
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