近似模型 的英文怎麼說

中文拼音 [jìnsìmóxíng]
近似模型 英文
a roximate model
  • 近 : Ⅰ形容詞1 （空間或時間距離短） near; close 2 （接近） approaching; approximately; close to 3 （親...
  • 模 : 模名詞1. （模子） mould; pattern; matrix 2. （姓氏） a surname
  • 近似 : approximate; similar; approach; approximation; roughness; propinquity
  • 模型 : 1 （仿製實物） model; pattern 2 （制砂型的工具） mould; pattern3 （模子） model set; mould patter...
  1. It is shown that, similar to the low frequency approximation, the more ideal the switching pair commutates currents, the less the switching pair contributes to the overall output noise

    我們證明了，與低頻近似模型相似，混頻器中的開關對的開關性能越好，則輸出噪聲越小。
  2. The design tools of isight such as integration, design of experiment, approximation and optimization are applied to develop the design and optimization software for airfoils of wing - in - ground air vehicle

    本文應用多學科優化軟體isight的過程集成、試驗設計、近似模型、優化演算法等功能開發了地效飛行器翼型優化設計軟體。
  3. It is shown that the excessive local oscillator drive deteriorates the conversion gain of the mixer at high frequencies, a trend not shown in the low frequency approximation

    我們征明了在高頻下，過大的本振將使得混頻器的轉換增益減小。這一趨勢無法由低頻近似模型給出。
  4. The thesis also discusses the thermal blooming and physical of the heat halo produced by intense laser. the thesis emphasizes on otf and psf of atmospheric turbulence. taking three screen systems as the example, we get the ideal approximation model, especially the short - exposure otf

    並介紹了強激光產生熱暈的理論模型及其物理特性機理，重點介紹湍流大氣的otf和psf ，以三種屏系統為例，得到湍流大氣的理想近似模型，特別是短曝光otf 。
  5. The thesis summarizes the basic theories of price discrimination, expatiated on the multi - class differential pricing method and dynamic differential pricing theory ; concludes the factors that have impacts on tickets - price, analyses and classfies the factors ; brings forward a canonical method of market segmentation, introduces the process of market segmentation based on the model of gray relative level, discusses the idiographic measure of ticket - price control ; improves the academic achievements of former scholars, puts forward a model of multi - class dynamic differential pricing for the air passenger transport, which is based on the maximum revenue for the airline industry, and gives a approximate arithmetic of the model, then showes the application of the model and its feasibility on increasing airline industry ’ s revenue by 25 models

    在對民航定價的國內外研究現狀進行綜述的基礎上，從經濟學角度介紹差別定價的基本理論，闡述民航客運的多等級差別定價理論和動態差別定價理論;對民航票價的影響因素進行分類說明;作為多等級定價的基礎，提出市場細分的標準和方法，用灰色關聯度模型解決航空旅客市場細分問題，並提出票價控制的具體措施;引入一種旅客到達頻率預測的統計方法，以航空公司收益最大化為目標，建立基於多等級定價基礎上的動態差別定價模型，即多等級動態差別定價模型，給出模型的遞歸演算法，通過對動態差別定價模型的運行結果進行分析，建立模型的一種近似模型，並且用25個簡單算例說明模型的用法以及在提高航空公司收益方面的可行性。
  6. Differential scanning calorimeter ( dsc ) combined with melt fluxing technique was used to realize undercooling of melt and its specific heat was measured at the same time, and its thermodynamics were calculated simultaneously and compared to four well - known models

    本文將差示掃描量熱法（ dsc ）和助熔劑處理技術相結合，研究了熔體的過冷現象，測量了過冷狀態下熔體的比熱，計算了過冷熔體凝固過程中的其它熱力學參數，並與四種近似模型進行了比較分析。
  7. However, the analyses of suspension bridge structures are still preferred by finite displacement analysis based on 2d ( two - dimensional ) or spatial skeleton approximate models

    但大跨度懸索橋的分析至今還局限於用平面或空間骨架近似模型。
  8. Also, the paper provides an analytical assessment of the flutter character of the vehicle model

    本文還進行了該飛行器近似模型的顫振特性的解析估計。
  9. The innovations of this thesis are as the follows : 1 ) it is analyzed that the lower - order jacobi - anger expansion model for an incoherently distributed source has better accuracy performance than some other approximate source models such as space frequency model, two - point source model, and low - rank approximate model. using the parametric decoupling property of the ja - based model, a novel angular parameter estimator is proposed, which is very robust in case of large angular spreading

    本文從這三個方面開展了空間分佈源波達方向估計研究，創新點包括： 1 ）分析了低階jacobi - anger級數展開近似模型的誤差性能；利用該近似模型的參數解耦特性，提出了一種新的波達方向估計器，在大角度擴展條件下，該估計器表現非常穩健。
  10. This paper designs a measurement system and measures the main properties of power line practically. the characteristics of power line are analyzed in detail, and a power line channel model is presented which consists of the parametric transfer function model and the simulating model of background noise, narrow noise and impulse noise. simultaneously the simulating method on the computer is presented

    本文設計了一個測量系統對實際電力線通道的主要特性進行了測量，詳細分析了電力線的信號傳輸特性和噪聲特性，給出了一個實用的室內電力線通道模型，包括參數化的傳輸函數模型以及背景噪聲、窄帶噪聲和脈沖噪聲的近似模型，並給出了計算機模擬實現方法。
  11. We give a mathematical proof for the model - approximately independence of anc coefficient. combining a concrete nuclear reaction, we check up the model - approximately independence of anc coefficient with numeric calculation. under the el transition condition, a expressions with anc coefficient to compute the cross section of radiative capture reaction has been given in this thesis

    我們對anc系數的近似模型無關性給出了一個數學形式理論證明，並結合具體的核反應，利用數值計算驗證了anc系數的近似模型無關性；在e1躍遷情況下，我們給出了一個用anc系數計算輻射俘獲反應截面的計算公式。
  12. The rsm approximation models can be efficiently used to reduce the number of exact cfd analysis, create smooth response functions and improve convergence of optimization algorithms. at the stage of rsm and sqp iterations, once the design cannot be improved based on rsm, exact analyses will be performed by 3d navier - stokes cfd

    5 .在局部尋優階段，採用了全三維流場數值模擬程序對近似模型進行校正，用sqp方法對近似模型進行局部尋優，既保證了氣動性能分析的精度，又大大減少了實際數值模擬的總計算開銷。
  13. In the aerodynamic optimization design of turbomachine, the approximation model methods enable to balance the computational cost and accuracy, whose successful applications in centrifugal compressor impeller, diffuser, and mixed - flow pump impeller designs are introduced to show a wide engineering foreground

    基於統計學理論提出的近似模型方法有效地平衡了基於計算流體動力學分析的葉輪機械氣動優化設計中計算成本和計算精度這一對矛盾，在離心壓氣機葉片擴壓器、葉輪和混流泵葉輪設計等問題中得到了成功應用，展示了廣闊的工程應用前景。
  14. The shifts of absorption edge of nanocrystsls compared with that of bulk have been calculated by means of effect - mass approximation model. the calculation and experimental results looked almost same

    用有效質量近似模型（ ema ）計算了半導體納米晶體的吸收邊相對體材料的移動，並將理論結果和實驗結果進行了比較，兩者相符較好。
  15. To reduce huge computation of the traditional stochastic optimization methods for engineering optimization, approximation model methods with acceptable accuracy for engineering design are developed based on the statistical theory

    摘要針對在工程中完全採用隨機類優化方法尋優時計算量過大的問題，應用統計學的方法發展了計算量小、在一定程度上可以保證設計準確性的近似模型方法。
  16. Control systems in modern automatic engineering are nonlinear, time - changed and indefinite. lt is difficult to model by traditional method, even sometime impossible. under these circumstances we should apply model identification to gain the approximate model of object for effective control, there are many models to be chosen, fuzzy model is one of them, it is put forward with the development of fuzzy control. fuzzy model has characteristics of general approximation and strong nonlinear, it is fit for describing complex, nonlinear systems. to avoid rules expansion when the number of input values are very big. in this paper we apply hierarchical fuzzy model to resolve this problem, we also illustrate it has general approximation to any nonlinear systems. genetic algorithm is a algorithm to help find the best parameters of process. lt has abilities of global optimizing and implicit parallel, it can be generally used for all applications. in our paper we use fuzzy model as predictive model and apply ga to identify fuzzy model ( including hierarchical fuzzy model ), we made experiments to nonlinear predictive systems and got very good results. the paper contains chapters as below : chapter 1 preface

    現代控制工程中的系統多表現為非線性、時變和不確定性，採用傳統的建模方法比較困難，或者根本無法實現，在這種情況下，要實現有效的控制，必須採用模型辨識的方法來獲取對象的近似模型，並加以控制，目前用於系統辨識的模型種類很多，模糊模型是其中的一種，它隨著模糊控制的發展而被人提出，模糊模型具有萬能逼近和強非線性的特點，比較適合於描述復雜非線性系統，為了解決模糊模型在輸入變量較多時規則數膨脹的問題，文中引入遞階型模糊模型，並引證這種結構的通用逼近特性。遺傳演算法是模擬自然界生物進化「優勝劣汰」原理的一種參數尋優演算法，它具有隱含并行性和全局最優化的能力，並且對尋優對象的要求比較低，在工程應用和科學研究中，得到了廣泛的應用，本文將遺傳演算法引入模糊模型的辨識，取得了很好的效果。
  17. Approximate model method for system design and its application

    系統設計的近似模型方法及其應用
  18. Based on the traditional plastic limit analysis, an improved rigid - nonlinear hardening approximate model is established

    摘要應用傳統的極限分析理論，提出一種改進的剛性非線性強化近似模型。
  19. The model used to control mesh deforming is improved spring analogy with boundary improvement and torsional effect improvement

    網格變形的物理模型採用改進的彈簧近似模型，改進措施包括邊界修正和扭轉效應修正。
  20. Using the approximate model of main steam pressure and linear quadratic optimal control theory, the lq sub - optimal control strategy is brought forward

    基於主蒸汽壓力降階近似模型和二次型最優控制原理，文中還給出了主蒸汽壓力的lq次優調節策略。
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