approximate function 中文意思是什麼

approximate function 解釋
逼近函數
  • approximate : vt 1 使接近。2 接近；走近。3 近似，約計。4 模擬。5 估計。vi 近於。 His income this year approxima...
  • function : n 1 功能，官能，機能，作用。2 〈常 pl 〉職務，職責。3 慶祝儀式；（盛大的）集會，宴會。4 【數學】...
  1. Using the approximate ability to nonlinear function of neural networks, the adaptive frame of identification and controller are constructed. and the formula of jacobin matrix for unknown systems is given, which is used to train the neural networks controller in closed systems

    總結了bp神經網路的基本理論，把基於非線性數值優化技術的leven - marquardt方法用於bp網路辨識器和控制器的訓練，模擬結果表明該演算法性能遠遠優于標準bp類演算法。
  2. Applying the results to optimal controller to realize the minimizer of the cost function of mkdv - burgers equation under neumann and dirichlet boundary control. secondly, using inertial manifold and approximate inertial manifold theory, the approximate inertial manifold under fourier bases is given and we construct a set of odes of three modes to obtain the long - time dynamic behavior

    其次，利用慣性流形和近似慣性流形理論，給出mkdv - burgers方程在fourier基下的近似慣性流形，並且把這一方程所確定的無窮維動力系統約化為一組三模態下的常微分方程組，從而研究這一方程所確定的動力系統的長期動力學行為。
  3. Some properties of polynomial mollifier are presented and the conclusion that polynomial can consistently approximate continuous function is proved

    給出多項式軟化子的幾個性質，並由此證得用多項式一致逼近連續函數的結論。
  4. By introducing proper stretchy variable and constructing boundary layer function, it concludes n - order approximate solution, and using theory of differential inequality, uniformly validity of asymptotic expansion is proved

    通過引進適當的伸長變量，構造邊界層函數，得到了解的n階近似值，並利用微分不等式理論證明了解的漸近展開式的一致有效性。
  5. In the following part, we define a couple of new approximate operators and a couple of corresponding new approximate measure operators, in this way, inner measure belief function and lower probability all can be considered as the particular cases of this lower approximate measure

    通過定義一對新的逼近運算元以及相應的一對逼近測度，使內測度、信任函數、隨機集上的下概率均可表示為此下逼近測度結構下的一種特例。
  6. The mechanism of anti - wear and friction reduction of nanometer cacoa has been discussed and individual opinions of the nanometer particles " existing way and effects have been proposed. 1 ) the shape of the nanometer cacos particle is approximate to that of sphericity. its function is similar to that of the miniature " ball bearing "

    6 、探討了納米碳酸鈣粒子的抗磨減摩機理，對于納米粒子在潤滑油中的存在方式和作用提出了個人見解： （ 1 ）納米碳酸鈣粒子近似為球形，它們起了類似微型「球軸承」的作用，從而提高了摩擦副表面的潤滑性能。
  7. With the application of a practical engineering, this paper carries on an investigation in the dynamic performance of water supply system. the vibration mechanism of pipelines and the factors that affect pipelines " vibration are analyzed. an approximate analysis of the function of liquid in pipelines is also given

    論文緊密結合工程實際，對供水系統動態特性進行了分析，研究了管道振動機理，分析了影響管道振動的因素，對供水系統管道進行了模態分析，從理論和模擬角度研究了管內流體對管道振動的影響；並運用分析結論指導供水系統的減振降噪改造工程，取得了很好的工程效果，進一步拓展了管道振動研究內容，使其與生產實際緊密結合。
  8. At the last, in accordance with the evaluation, the total loads are allocated to each sub - district. the third is fuzzy - logic - based approximate reasoning method which can consider weights in the premise in rules and a denazification decision - making function

    鄭州大學碩士論文摘要第三、基於模糊邏輯和近似推理的訣策方法：該方法是一種在知識不完備情況下，能夠考慮推理前提重要性的、基於模糊邏輯的近似推理和決策的新方法。
  9. The artificial neural network is used to tackle an ill - posed problem of the parameter identification and to approximate nonlinear function relationship between the vibration responses of the hydraulic generator and model parameters

    利用人工神經網路具有解決參數識別反問題不適定性的能力，建立了水輪機系統響應與模型參數之間近似的非線性函數關系。
  10. In the scheme of the atomic interferometer based on the uccc, we discuss the approximate solution of atomic matter wave - function in double - channel magnetic guide, and analyze the evolution of transverse wave function in the process of atomic interference and show the probability distribution after the interference

    利用在u -型載流導體基礎上構建的原子干涉儀，討論了雙通道磁導引中物質波波函數的近似求解。此外，還分析了干涉過程中橫向波函數的演化，並給出了物質波通過干涉儀后的干涉條紋。
  11. The air - gap harmonic magnetic field and its effect on the iron losses are analyzed ; then the design rules to reduce the harmonics and the iron losses are presented ; at last, the sine or approximate sine air - gap magnetic field is constructed with non - homogenous air - gap, and the non - homogeneous air - gap function is presented

    第三部分對永磁同步電動機的氣隙磁場進行了理論分析和電磁場數值計算，分析了永磁同步電動機氣隙諧波磁場的特點和不同轉子結構尺寸對氣隙諧波的影響，提出了削弱氣隙諧波磁場減小損耗的措施。
  12. In chapter 2 there are four goals : the first is to investigate some geometric properties of h - caccioppoli sets, the second is to characterize the discontinuous set su and jump set ju of u bvh ( ), the third is to study pointwise behavior of u bvh ( ) and our effort is concentrated on showing approximate differentiability of u in the sense of pansu ' s, while the last and the most important is to show that dhu with u bvh ( ) as a radon measure can be split into three parts ( absolutely continuous part, jump part and cantor part, respectively ) just like the derivative of a bv function in the setting of euclidean space

    第二章有四個目標：一是討論h - caccioppoli集的若干幾何性質，二是刻畫h -有界變差函數的近似不連續點集和跳躍點集的特徵，三是研究u bv _ h （ ）的逐點行為，我們集中討論u在pansu意義下的近似可微性，最後也是最重要的目標我們證明對u bv _ h （ ） ， d _ hu作為radon測度能夠分解成絕對連續部分、跳躍部分和cantor部分之和。
  13. ( 3 ) there is a relation approximate to exponential function between particle size and jumpiness of light scattering energy

    （ 3 ）經初步擬合，粒徑和散射光能量跳動量之間有指數函數的關系。
  14. When the energy distribution are represented by arbitrary tabulated function ( lf = 1 ), some approximate descriptions ( e. g. simple triangular shape or rectangular shape ) of the energy distribution are applied near the threshold for some nuclides

    一般近似的能譜形狀有三角形分佈（即用三個出射能點且線?線插值描述）和矩形分佈（即用兩個出射能點且矩形插值描述） 。
  15. To choose wavelet function based on time - frequency region is put forward, time - frequency region composing of all of these wavelet functions can overlay wholly time - frequency region of non - linear function to approximate

    本文提出了根據逼近函數的時頻空間區域來選擇小波基函數，使這些小波基函數共同構成的時頻空間區域覆蓋完逼近函數的時頻空間區域。
  16. Finally, take example for a non - linear function, method mentioned in this paper is used to design wavelet neural network to approximate this function. the computer simulations confirm the method that is brought out in this paper is useful, and prove that wavelet neural network has not only fast convergence and better precision of approximation, but also good capability of forecasting and escaping error

    最後，對於一個實際的非線性函數，用本文介紹的方法來設計小波神經網路來逼近函數，模擬結果表明該方法的有效性，並且表明小波神經網路在函數逼近上，網路的收斂速度快，逼近精度高的特點，並且網路具有很好的泛化能力和容錯性。
  17. Ph linearization method is employed to solve a nonlinear reynolds equation for a steady state and micro - scale flow field, and the approximate function expressions of gas dynamic pressure and velocity in the spiral groove are obtained

    摘要應用ph線性化方法、迭代法，近似求解了螺旋槽內穩態微尺度流動場的非線性雷諾方程，求得了氣體動壓和速度分佈的解析解。
  18. 2. for the problem with size, stress and displacement constraints, the stress constraint is transformed into movable lower bounds of sizes, the displacement constraint is transformed into an approximate function which explicitly includes design variables by using mohr integral theory. a mathematical programming model of the optimization problem is set up. the dual programming of the model is approached into a quadratic programming model

    2 .對于尺寸、應力和位移約束的問題，將應力約束化為動態下限，用單位虛荷載方法將位移約束近似顯式化，構造優化問題的數學規劃模型，將其對偶規劃處理為二次規劃問題，採用lemke演算法進行求解，得到滿足尺寸、應力和位移約束條件的截面最優解。
  19. When adding an entropy function as regularizing term to the lagrangian function, we obtain a smooth approximate function for m ( x ), which turns out to be the exponential penalty function

    當將熵函數作為正則項加到拉格朗日函數上，我們得到了逐點逼近於m （ x ）的光滑函數。經證明，該函數即為指數罰函數。
  20. This feature reflects the physical phenomenon of breaking of waves and development of shock waves. in the fields of fulid dynamics, ( 0. 2. 1 ) is an approximation of small visvosity phenomenon. if viscosity ( or the diffusion term, two derivatives ) are added to ( 0. 2. 1 ), it can be researched in the classical way which say that the solutions become very smooth immediately even for coarse inital data because of the diffusion of viscosity. a natural idea ( method of regularity ) is obtained as follows : solutions of the viscous convection - diffusion pr oblem approachs to the solutions of ( 0. 2. 1 ) when the viscosity goes to zeros. another method is numerical method such as difference methods, finite element method, spectrum method or finite volume method etc. numerical solutions which is constructed from the numerical scheme approximate to the solutions of the hyperbolic con - ervation laws ( 0. 2. 1 ) as the discretation parameter goes to zero. the aim of these two methods is to construct approximate solutions and then to conside the stability of approximate so - lutions ( i, e. the upper bound of approximate solutions in the suitable norms, especally for that independent of the approximate parameters ). using the compactness framework ( such as bv compactness, l1 compactness and compensated compactness etc ) and the fact that the truncation is small, the approximate function consquence approch to a function which is exactly the solutions of ( 0. 2. 1 ) in some sense of definiton

    當考慮粘性后，即在數學上反映為（ 0 . 1 . 1 ）中多了擴散項（二階導數項） ，即使很粗糙的初始數據，解在瞬間內變的很光滑，這由於流體的粘性擴散引起，這種對流-擴散問題可用古典的微分方程來研究。自然的想法就是當粘性趨于零時，帶粘性的對流-擴散問題的解在某意義下趨于無粘性問題（ 0 . 1 . 1 ）的解，這就是正則化方法。另一辦法從離散（數值）角度上研究僅有對流項的守恆律（ 0 . 1 . 1 ） ，如構造它的差分格式，甚至更一般的有限體積格式，有限元及譜方法等，從這些格式構造近似解（常表現為分片多項式）來逼近原守恆律的解。
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