approximation theory 中文意思是什麼

approximation theory 解釋
逼近理論
  • approximation : n. 1. 接近；近似。2. 【數學】近似值。3. 概算，略計。
  • theory : n. 1. 理論，學理，原理。2. 學說，論說 （opp. hypothesis）。3. 推測，揣度。4. 〈口語〉見解，意見。
  1. The approximation analysis result of band dipole model is obtained on the basis of the theory of mfl. the electromagnetic distribution feature of the defect in the steel panel is studied by means of simulation. the leakage magnetic distribution of the two defects and four defects plural and the defects in the column differently in the width are also assayed. conclusions that factors affecting flaw magnetic leakage to the panel also affect the column and magnetic leakage bx should be the feature of the flaw identification to several flaws are drawn

    在對漏磁檢測原理進行詳細介紹的基礎上，得出了帶偶極子模型的近似解析解，並以有限元數值模擬分析為主要手段，以鋼板上缺陷為對象，分析了各因素對缺陷漏磁場產生影響的不同規律，同時模擬分析了板上平行的兩條裂紋，四條裂紋以及柱體上寬度不同時的裂紋的漏磁場分佈特徵，得出結論:影響板上缺陷漏磁場的諸因素會對柱體上缺陷漏磁場產生同樣的影響;對于多條裂紋，宜用漏磁分量bx作為缺陷識別的特徵量。
  2. At first, this paper analyzes the factors of water - sand influencing water level of yellow river and the feasibility just using the factors of water - sand to study water level, and collects the corresponding data ; secondly, because there are strong nonlinear relation in the corresponding data, by meticulous theory analysis, this paper integrates basic nonlinear analysis method, theory of random analysis, method of least squares and so on. it puts forward a method which can get the high accuracy simulation of the data, perfects the multi - factor analysis of variable ( over three factors ) of the statistic ; thirdly, it applies the method to the approximation of corresponding water level process which belong to the capacity of sand of middle - high and middle - low, and get the high - accuracy simulation about the typical nonlinear relation ; at last, this paper definitudes the main influence mode that the capacity of sand. it mainly unite with other factors to work on the water level in the yellow river lower reaches ; mor eover, this paper analyzes the difficult point and the direction of improvement to realize the accuracy forecasting of the flood level of erodible - bed channel

    首先，系統分析了影響黃河水位的水沙因素，及僅用水沙因素有效研究水位的可行性，並按變量對應思想採集它們的相應數據；其次，由於相應水位過程數據中含極強的非線性關系，本論文經細致的理論分析，將基本的非線性分析方法、統計建模方法、隨機分析理論、最小均方誤差原則等等數學理論及方法有機揉合，提出了能有效實現這類數據高精度擬合的分層篩選法，並改進了統計學中多因子（三個以上）方差分析法；再次，將這一方法用於黃河中高及中低含沙類洪水相應水位過程的擬合，實現了這一典型非線性關系的高精度擬合，各年汛期上下游相應洪水位過程的擬合誤差都較小；最後，明確黃河下游含沙量對水位的主要影響方式，即含沙量主要是與其它因素聯合對水位作用；另外分析了要實現變動河床洪水位過程準確預報的困難所在及改進方向。
  3. Abstract : the theory of variable structure control of sing ular nonlinear control systems was considered based on the singular nonlinear systems itself by employing the method of geography, and gives the sufficient condition of existence of variable structure control and approximation theory of real sliding mode. it is shown that sliding condition only guarantee the slow - varying state of real sliding mode approach that of ideal sliding mode but not guarantee the fast - varying state of real sliding mode approach that of ideal sliding mode. the method applied for studying normal nonlinear system can not be used directely to singular nonlinear system

    文摘:利用幾何方法，從廣義非線性系統本身出發，研究了廣義非線性控制系統的變結構控制理論，給出了系統存在變結構控制的充分條件及實際滑動模的近似定理.從所得結論可知，滑動條件僅能保證實際滑動模的慢變狀態趨近於理想滑動模的慢變狀態，而不能保證實際滑動模的快變狀態趨近於理想滑動模的快變狀態，研究正常非線性系統的方法已不能簡單地被利用到廣義非線性系統
  4. The opacity of element is calculated with a bsa ( band smear approximation ) theory on the basis of hydrogen - like screen average atom model

    在此基礎上，用能帶抹平近似方法計算元素的不透明度。
  5. Then based on kirchhoff approximation theory, the formula of the coherent and incoherent scattering intensity of plane wave from two dimensional dielectric normally distributed rough surface are derived, and the scattering intensity of a planar, rough surface of unit area

    然後從粗糙面散射kirchhoff標量近似理論出發，得到了平面波對高斯分佈的二維隨機粗糙面的相干散射和非相干散射強度表達式，並給出了單位面積粗糙面非相干散射的表達式。
  6. A drive method of unequalized clock counter in panel display which uses no dissimilarity @ subclass to achieve precision unequalized clock counter correction based on functions approximation theory is proposed. the new method is acquired based on the particular analysis results of the display drive design projects which adopted counter drive method in which the balance between the display image quality and the cost of drive circuit is given. finally, synthesis comparison examples are given

    針對目前以該方法為基礎普遍採用的不同技術方案進行詳盡的分析，根據分析的結果闡明了其在圖像顯示質量和驅動代價方面的優缺點，在此基礎上基於函數逼近理論提出了一種平板顯示器計數器非均勻時鐘驅動方法，該方法在計數器時鐘上採用非相異子集完成高精度的非均勻時鐘計數器校正。
  7. The study of direct and inverse theorems on the approximation of linear operators to functions in normed linear spaces is an important subject in the approximation theory. it is significant in theory and application

    線性運算元對賦范線性空間中函數逼近正逆定理的研究是逼近論中重要的研究課題之一，在理論和實際應用上都具有重要的意義。
  8. In the section 2, firstly based on the diffusion approximation theory, the temporal characteristics of the reflectance and the transmittance were theoretically analyzed in turbid tissues ; secondly, the curves were simulated that the intensity and the pulse shape of the time resolved reflectance and transmittance versus the absorption a, the scattering s and the anisotropy coefficient g in two different boundary conditions : semi - infinite turbid media and homogeneous slab ; at last, the optical properties can be derived from the curves ; in the section 3, the conditions of ultra short laser pulses of different pulse - width and shapes has been theoretical analyzed and calculated, besides, the simulated the curves of the intensity and pulse shapes of the reflectance and transmittance in a homogeneous slab are obtained for use and future studying

    第二章中首先根據漫射近似理論對超短脈沖在以生物組織為典型的混濁介質中傳輸進行了理論分析，然後對兩種邊界條件下產生的漫反射、漫透射光脈沖強度和形狀隨各光學特性參數的變化情況進行了數值模擬，最後得到了混濁介質的光學特性參數與漫反射、透射脈沖強度與形狀的關系曲線。第三章對不同形狀和脈寬的脈沖光源入射到混濁介質中產生的漫反射、漫透射脈沖的強度和形狀進行了理論分析和數值模擬，並將高斯脈沖與方波脈沖情況進行了對比，得到了各種情況的漫反射、漫透射脈沖強度、形狀與各光學特性參數的關系曲線，這對從分析脈沖形狀中提取介質的光學特性參數的信息有重要的意義。
  9. The various medium parameters have different influence on the reflection of the laser pulse. based on the diffusion approximation theory, the boundary condition of semi - infinite homogeneous media, the influence of the absorption a, the scattering s and the anisotropy coefficient g on the ultra short laser pulse of different pulse - width and shapes has been researched

    論文對超短脈沖在混濁介質中的傳輸進行了理論分析和數值模擬，並在不同脈寬的高斯脈沖和方波脈沖入射到混濁介質的漫反射、漫透射脈沖強度和形狀進行了理論分析和數值模擬，得到了它們與各光學特性參數的關系曲線。
  10. The approximation theory on the p - adic walsh - fourier riese average

    級數黎斯平均的逼近定理
  11. In chapter two, the basic knowledge related to panel display drive technology and chromaticity is introduced. some terminology of functions approximation theory is presented

    第二章介紹了有關平板顯示器驅動技術的基本原理和顯示色度學相關的基礎知識，同時給出函數逼近理論的基本概念。
  12. In addition, the paper makes relatively in - depth analyses on the function approximation theory of radial basis function neural networks and the stability of the adaptive controller based on radial basis function neural networks

    此外，本文對徑向基函數神經網路的函數逼近理論以及基於徑向基函數神經網路的自適應控制器的穩定性作了較深入的分析。
  13. The other, called " integral method ", is got by converting the problem to degree reduction of bi - variable polynomials with upper bounds using approximation theory and the relationships between chebyshev bases and bernstein bases

    另一個是將問題轉化為二元多項式的保上界降階問題，再由近似逼近理論和chebyshev基與bernstein基的轉換關系，求得區間有理bezier曲面的降階逼近的「整體法」 。
  14. The purpose of this dissertation is to study the problems of driving algorithm of high quality image display in panel display devices, and adjustment of color based on the virtual gamut transformation with merging approximation theory as essential means

    本論文的目的是以擬合逼近理論和顯示色度學為基礎，研究平板顯示器高質量的圖形、圖像顯示驅動演算法和基於準虛擬色度空間變換的顏色修正方法及其在高清晰度平板顯示器中的應用。
  15. Since time sectional scan method ( tssm ) acts as the dominant partner in the panel display, attention is drawn to the aspect in the drive methods. according to functions approximation theory, the method of complex merging approximation tssm which utilize multiple dissimilarity @ subclasses to achieve precision visual perception scale control is proposed. the comparison examples are given thereinto

    首先，針對這種在平板顯示器顯示技術方面佔主導地位的驅動方法進行細致的研究，在此基礎上根據函數逼近理論提出了平板顯示器時間片掃描的混合擬合逼近驅動方法，該方法採用多組相異子集_ i ~ *完成高精度的符合視覺感覺的灰度級控制。
  16. The paper applies algebraic geometry, computational geometry, approximation theory to study the following problems : the nother type theory and the riemann - roch type theory of the piecewise algebraic curve ; the number of real intersection points of piecewise algebraic curves ; the real piecewise algebraic variety and the b - net resultant of polynomials

    本文應用代數幾何，計算幾何，函數逼近論等學科的基本理論，分別就分片代數曲線的n （ ? ） ther型與riemann - roch型定理；分片代數曲線的實交點數；實分片代數簇以及多項式的b -網結式進行研究。
  17. This paper discuss a modeling and predicting means for nonlinear systems proceeding from nonlinear systems modeling and predicting theory, whch is based on drnn model. this means overcomes the fact that ar model is used only in linear systems, at the same time it connects itself with approximation theory symbolic statistics and conjugate gradient algorithm, and formulate a system of large watercrafts motion modeling and predicting which is based on drnn model, and simulate it

    本論文從非線性系統建模與預報的理論及應用觀點出發，系統地闡述了一類適用於非線性系統的建模預報方法? ?基於drnn模型的建模預報方法，克服了ar模型僅局限於線性的情況，同時結合逼近論、數理統計等知識，運用共軛梯度演算法，提出並建立了基於對角回歸神經網路的大型艦船運動建模預報系統，並進行了模擬。
  18. Eno schemes are based on the approximation theory, which achieve high - order spatial accuracy by reconstructing piecewise smooth high - order approximate polynomial from the cell - averaging values. during the reconstruction, adaptive stencil technology, which automatically chooses the relatively smoothest stencil from all possible stencils, is adopted to guarantee essentially non - oscillation near the discontinuity

    Eno格式基於近似理論，採用自適應基架技術（即自動選取所有基架中相對最為光滑的基架） ，對網格平均值構造分段光滑的高階多項式來獲得高階空間精度，同時保證格式在間斷附近具有基本無振蕩性質。
  19. The main research work involves : ( 1 ) based on first order ode ( ordinary differential equation ) approximation theory and hopf bifurcation theory, the nonlinear motion stability of the train is studied emphatically

    本文所做的主要工作有： （ 1 ）基於常微分方程的一次近似理論和hopf分叉理論，重點研究了列車（車輛）系統的非線性運動穩定性。
  20. In this paper, the principles on vlsi realization of one - dimension cwt are expounded, and the relevant methods of the implementation are classified and compared with each other. and then, a novel method of implementing one - dimension continuous wavelet transform using switched - current circuit is proposed, in which the continuous wavelet transform is implemented by the parallel structure of biquadratic functions realized with switched - current circuits on the basis of approximation theory of network function

    本文闡述了小波變換vlsi實現的原理，並對相關的實現方法進行了分類和比較，提出了一種新的利用開關電流電路實現任意一維連續小波變換的方法，基於網路函數逼近理論，將連續小波變換轉化為雙二次函數並聯電路結構，並用開關電流技術實現。
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