approach gradient 中文意思是什麼
approach gradient
解釋
進場著陸航跡傾斜度-
Could there exist another possibility for the south boundary of the system as follow : the rainfall infiltrates in the outcrop carbonate - mountain area of western, and moves towards south and deeper along carbonate rocks, then moves upper through the overlain tertiary system ( n ) with a thickness of 400m ( instead of running off to the springs and yellow river through a long approach of least hydraulic gradient ), and then mainly transforms into the horizontal drainage in the loess layer of quaternary, finally drains in lu - botan depres sion
並且提出，關于對系統南界的認識，是否存在另一可能：即在西部碳酸鹽巖裸露區大氣降水入滲后，沿碳酸鹽巖向南向深部運動，然後，並非在極小的水力坡度驅動下長距離地向東部黃河、泉群徑流排泄，而是通過上覆厚度約400m的第三系向上運動，繼而主要在第四系黃土層中轉為向南水平排泄到鹵泊灘。 -
Abstract : a new approach, gate - capacitance - shift ( gcs ) approach, is described for compact modeling. this approach is piecewise for various physical effects and comprises the gate - bias - dependent nature of corrections in the nanoscale regime. additionally, an approximate - analytical solution to the quantum mechanical ( qm ) effects in polysilicon ( poly ) - gates is obtained based on the density gradient model. it is then combined with the gcs approach to develop a compact model for these effects. the model results tally well with numerical simulation. both the model results and simulation results indicate that the qm effects in poly - gates of nanoscale mosfets are non - negligible and have an opposite influence on the device characteristics as the poly - depletion ( pd ) effects do
文摘:提出了一種新的建立集約模型的方法，即柵電容修正法.此方法考慮了新型效應對柵電壓的依賴關系，且可以對各種效應相對獨立地建模並分別嵌入模型中.另外，利用該方法和密度梯度模型建立了一個多晶區內量子效應的集約模型.該模型與數值模擬結果吻合.模型結果和模擬結果均表明，多晶區內的量子效應不可忽略，且它對器件特性的影響與多晶耗盡效應相反 -
Then, a practical approach of software quality evaluation based on this model is given out which uses the network method of nerve and combines the associative memory model with the expert judge and fuzzy appraisal according to the gradient theory. and a program of this approach is compiled using c #. net
然後，根據梯度理論，應用神經網路方法將聯想記憶模型與專家評判、模糊評價相結合，給出一個基於此模型的軟體質量評價的實用方法，並用c # . net對此評價方法編程實現，最後通過實例來說明此方法。 -
The effective optimization design programs for different cases are developed by integrating the following several aspects which involves the flow analysis, adjoint equation solution, gradient solution, optimal arithmetic and grid generation. some practical design tests for airfoil and wing show that the continuous adjoint approach is very effective and useful method for aerodynamic optimization design. at the same time, we have done the research of aerodynamic optimum design for airfoils by using navier - stokes equations
（ 4 ）研究了基於控制理論和三維navier一stokes方程的優化設計理論，在計算坐標下詳細推導了該優化設計理論，得到了計算坐標系下描述的共扼方程數學描述形式，並以給定目標壓力分佈的氣動反設計為例，導出了相應的共扼方程邊界條件，以及關鍵的梯度求解具體表達形式，為了求解方便，把計算空間上描述共扼方程表達形式變換到物理空間中進行描述，通過與ns方程表達形式對比分析，最終給出了一種直觀的共轆方程表達方式。 -
The main contributions of this dissertation are summarized as follow : ( 1 ) an ilc approach combining feedforward with current feedback is developed based on optimal feedback control and the gradient method. a sufficient condition that guarantees the convergences is given for linear system. the procedures of designing the algorithm can employ lqr, h2 or h approaches to improve the convergence rate of learning in iterations
本文的主要成果有： 1 、在開閉環綜合迭代學習控制結構的基礎上，分析了利用梯度下降法設計前饋迭代學習控制器時，為保證演算法的收斂性，閉環控制系統應該滿足的充分條件，並依據提高演算法收斂速率的優化條件，給出了基於lqr 、 h _ 2和h等優化控制技術的迭代學習控制演算法的設計方法。 -
The initial solutions of two - dimensional harmonic waves are given by landau expansion and the mean - flow - distortion is calculated by the approximation equation. furthermore, we employ iteration method and “ predictor - corrector approach ” to solve the nonlinear equations in order to implement the marching procedure, and the result of nonlinear two - dimensional stability is obtained precisely. the effect of pressure gradient is also studied here
文中所發展的數值方法，包括採用landau展開給出二維諧波的初始解、模擬流場的均流變形以及採用迭代和預估校正方法實現非線性方程的求解和推進，得到了二維擾動的非平行非線性穩定性的精確結果。
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