計數效率 的英文怎麼說

中文拼音 [jìshǔxiàolǜ]
計數效率 英文
counter efficiency
  • 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
  • 效 : Ⅰ名詞（效果; 功用） effect; efficiency; result Ⅱ動詞1 （仿效） imitate; follow the example of 2 ...
  • 率 : 率名詞（比值） rate; ratio; proportion
  • 計數 : count; tally; counting計數卡 numbered card
  • 效率 : productiveness; efficiency; productivity; workpiece ratio
  1. 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
  2. ( 4 ) on the efficient method for the dynamical core of the new generation multi - scale forecasting model i ) we present a new multi - level sparse approximate inverse preconditnioner for the complicated 3 - d helmholtz equations in the new generation weather forecasting model. as a result, the new sparse approximate inverse preconditioned gcr and gmres algorithms are given and successfully applied in the dynamical core. numerical tests show that the new algorithms perform very efficiently, and can greatly improve the efficiency of numerical model

    對此，本文提出了一種基於逐層門限技術的近似逆矩陣稀疏模式預選方法，並構造了相應的稀疏近似逆預條件子，結合gcr演算法和g州[ r衛s演算法，首次將逐層門限稀疏近似逆預條件子應用於新一代多尺度預報模式動力內核的實際計算，數值實驗表明這里給出的方法可以大大提高數值模式的計算效率。
  3. Software - practice and experience, mar. 1994, 24 : 327 - 336. 13 han d, xiao c, zhou r et al. load shedding for window joins over data streams

    分別採用了窗口計數器預估數組和頻率數組來維護相應統計信息，並在實際中使用樹狀數組取代頻率數組以提高計算效率
  4. In recent years, plentiful and substantial fruits achieved by the lb method in simulations of hydraulics, multiphase flows, flows in porous media and heat transfer as well as magnetohydrodynamics, have revealed a broad perspective of application of this method, it will become a powerful competitor to the conventional approaches. in order to absorb the recent achievement in theory and application of the lb method, explore new ways in hydraulic computation to promote the development of practice, some work is car ried out in this thesis, as following : advances in the theory research and application, deductive process of the d2q9 model and some other commonly used models of the lb method are summarized. based on the hydrodynamic and general boundary conditions, a new joint boundary condition is presented, it integrates advantage of the two conditions above and obtains very good results in dealing with all kinds of boundaries of flow fields

    為了消化和吸收近年來lb方法在理論和應用方面的新成果，探索在水力計算方面的新途徑以促進lb方法實用化的發展，本文進行了下列研究工作：綜述了lb方法在理論研究和實際應用方面的新進展，以及d2q9模型的推導過程和其他一些常用的模型；在水動力邊界條件和通用邊界條件的基礎上提出了一種新的聯合邊界條件方法，它綜合了上述兩種邊界條件的優點，在流場的各種邊界處理中取得了非常好的效果，經過模塊化的處理以後這種邊界條件具有更好的實用性；針對均勻網格的lb方法計算效率較低的不足，提出了雙重網格的latticeboltzmann方法，通過二維poiseulle流動、后臺階流動和渠道方槽流動三個算例的模擬，證明這種方法能夠明顯地提高流場模擬的計算效率；此外，根據復雜區域流場的特徵提出了latticeboltzmann方法的分塊-耦合演算法，利用lb方法的計算特性實現塊與塊之間的數據交換，充分利用計算資源提高計算效率，通過對「 t 」型、 「十」型和「 x 」型分岔管道流場的模擬，展示了這種演算法的特徵和優點，以及它所具有的應用前景。
  5. The overwhelming loss in counting efficiency occurs during the scintillation process itself.

    絕大多數計數效率的損失出現在閃爍過程本身。
  6. A new approximate adjustment method for arbitrary centralized polygon is developed, together with its corresponding programme. an example is given to illustrate its higher computation efficiency, compared with the traditional method. both results are identical

    本文導出了中點多邊形近似平差的新演算法，並給出了適合任意中點多邊形平差的計算程序，計算結果和傳統方法一致，但避免了數據的重復輸入，提高了計算效率。
  7. 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。
  8. The computation results showed that the multi _ body system model was accuracy, the fuzzy _ pid compound control scheme was compact, both was just combined well, and this system had a good performance on improving the vehicle ' s ride comfort characteristics

    計算結果表明，以多剛體系統動力學的拉格朗日方法所建數學模型模擬精度高，計算效率高，方法可行，多剛體系統動力學模型同模糊pid復合控制策略結合較好，是一個行之有效的進行綜合模擬和優化控制的系統。
  9. Aiming at higher computational accuracy, the unstructured hybrid mesh and the distributed parallel computation are used in 3d complex flow field simulation, the combination of these two techniques often causes difficulties in data structure and sub - domain definition because of the non - unification of mesh elements

    在三維復雜外形的流場計算中，為了得到較高的計算效率及保證數值模擬的準確性，經常要採用混合網格及并行計算技術。
  10. In recent years, it is due to the modification and improvement of the algorithms and especially the development of computer science and technology both in hardware and software that lead to the advent of such practical analytic tools as blast, fasta, clustalw, which can relatively cater for the need of research in both efficiency and accuracy. the fundamental way to improve computation efficiency and accuracy is to better the alignment algorithms in principle so as to minish the computation complexity

    雖然近年來由於演算法自身的不斷改進以及計算機科學的發展，其實現程序依靠計算機硬體和軟體開發技術的提高得到了效率和精度上的改善，從而使現在應用廣泛的序列比對或數據庫搜索程序如blast 、 fasta 、 clustalw等才獲得了相對滿意的計算效率，但是從理論基礎和思想原理上改善序列比對演算法以期降低計算復雜度，才是提高計算效率和精度的根本途徑。
  11. The crack - growth increment of crack - line is computed by paris formula followed by fitting using three - time b - spline function

    根據以上思想方法，編寫了具有較高的計算效率和精度的數值模擬程序。
  12. This paper has come to some comprehensive conclusions on the basis of the practical use of this double - index evaluation method in the slope of pishihang channel. a calculating program for the double - index evaluation method is compiled to raise the calculating efficiency. the reinforce measures that adopt the new thesis of renewing stress and the expansive anchor are presented

    本文針對淠河總乾渠（城區段）邊坡這一實際工程引入了安全系數和可靠度相結合的雙重指標體系分析方法進行穩定分析，得出了較為全面的結論；在雙重指標體系分析方法的基礎上編制了計算程序，提高了計算效率；應用應力重塑新思想及其配套實施手段?膨脹錨提出了初步的邊坡加固解決措施。
  13. The criteria of convergence and gaussian integral rules are discussed as they affect the efficiency and precision of calculation

    討論了收斂準則及高斯點數的選擇對計算效率和精度的影響。
  14. According to the high dispersedness and low precision of measurements when using the traditional time difference method in small diameter and low flow rates conditon, this paper brings forward a new method based on high - speed data acquisition technique. the time difference comes out accurately with high resolving ability of time by using the method and the signal processing algorithms. the developed ultrasonic detection system is composed of two ultrasonic detectors, a transmitting and receiving ultrasonic unit, a high - speed data acquisition unit and a computer

    本文針對傳統的時差法在小管徑、低流速測量時，具有測時結果分散性大、測量精度受計數頻率的影響大等不足，創造性地把高速數據採集技術應用在超聲波流量、壓力測量上，用信號處理演算法求時差，使時差成為一個統計量，有效地克服了超聲波傳統時差法測量精度差、不能測量小管徑、低流速流體流量的缺點，提高了時差測量的解析度和精度。
  15. Three finite - difference methods, i. e., stagger grid, implicit and explicit algorithms, are analyzed in detail. multi - grid algorithm is firstly introduced in elastic wave simulation, to solve for the stability problem inherent in stagger grid and implicit algorithm, also for the efficiency problem inherent in explicit algorithm, and the precision, stability and efficiency for simulation of elastic wave arc increased by multi - grid method. phase - delay method is provided to effectively absorb boundary reflection and increase efficiency for wave motion simulation, based on phase delay and amplitude decaying features along wave propagation

    在水平分層介質接收函數的波形反演研究的基礎上，本文系統闡述了非均勻介質中彈性波傳播數值模擬常用的三種有限差分方法：顯式差分、隱式差分和交錯網格法，首次將多重網格演算法應用於彈性波方程的數值模擬問題，克服了交錯網格法和顯式差分法穩定性差，以及隱式差分法計算效率低的缺點，大大提高了彈性波數值模擬的精度、穩定性和計算效率。
  16. In this dissertation, the numerical computation for the acoustic radiation problem ( arp ) is studied deeply and systematically in the theory, method and the application technique, based on analyzing the situation of the home and abroad on the numerical computation for the acoustic radiation problem. the calculation formulas of the boundary element method ( bem ) for the exterior acoustic radiation problem in the full - space and half - space are deduced, based on the wave propagation theorem ; the arising of the non - unique solutions, which is associated with the application of the boundary integral equation ( bie ) in acoustic radiation problem, is analyzed and proofed ; the improved combined helmholtz integral equation formulation ( ichief ) is presented to overcome the non - uniqueness problem more effectively and reliably ; the determination of the singular integral coefficients on various occasions is analyzed ; the properties and treatments of the singular integrals with different orders axe studied ; the computation program of the cubic spline ichief is developed and its ability to overcome the non - uniqueness problem and feasibility to discrete the surface coarsely with the sufficient calculation precision are examined through examples

    第二章在聲波動理論基礎上，詳細地推導出對應于無限域和半無限域的外部振動聲輻射問題的邊界積分方程計算公式；根據fredholm積分理論，對利用邊界積分方程計算振動聲輻射問題過程中解的非唯一性的產生進行了分析和證明；改進了chief法以提高其克服解的非唯一性的有效性和可靠性；對不同條件下奇性系數的計算、強奇性積分的收斂性及其在變量替換時與普通積分的差異性、不同階奇性積分的計算、數值求積分等進行了研究；開發了三次樣條改進chief法計算軟體，並通過算例考核了該方法在特徵波數處克服解的非唯一性的有效性和在保證計算精度的前提下實現剖分粗化以提高計算效率的可行性。
  17. The tool system not only realizes interactive, derived and instance process planning, but also provides the module of half - intelligentized process resource database management to manage process resouce data dynamically and communicate with other systems, and the concurrent design can be implemented. consequently the efficiency of process planning and quality could be improved greatly

    該工具系統不僅實現了互動式、派生式和實例式等多種工藝設計方法，還建立了半智能化的工藝資源數據庫管理模塊，實現了工藝資源數據的動態管理以及與其它系統的信息交互，實現工藝的并行設計，從而大大地提高了企業工藝設計的效率與水平。
  18. One of the hybrid grids " advantages is easy to control the number of mesh layers and can decrease the number of grids, which make the numerical process require less computer resources and reduce the computation time. so the hybrid grids are involved in improving the computation efficiency. a finite volume hybrid solver which is based on jamson ' s scheme is developed

    該混合網格優點之一是能很好地控制靠近物面附近的網格層數，同時能減少網格的數量（在相同網格結點時與全場均採用非結構網格相比） ，這就降低了對計算機資源的要求，同時能減少計算時間，提高計算效率。
  19. Due to the very good computation efficiency of the wp coefficient, it was concluded that feature index of the wp coefficient node energy can satisfactorily meet the needs of bridge health monitoring

    認為兩種特徵指標的敏感性相差很小，而小波包系數節點能量特徵指標的計算效率更高，更適合橋梁健康監測中損傷特徵提取的要求。
  20. This paper suggests that the integral of the state equation is evaluated directly through the exponential matrix based on the pim, thus several series solutions are obtained. utilizing the symmetry of matrices and the idea of substructure, the computational precision and efficiency of the pim are improved

    本文深入研究精細積分及動力方程演算法，基於指數矩陣計算、 pade逼近理論，在時域上對非線性動力狀態方程直接積分求解，構建若干系統響應求解格式，並分析了演算法精度、效率；通過矩陣變換，利用矩陣對稱性、子結構等方法改進精細積分計算效率。
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