approximation of laws 中文意思是什麼

approximation of laws 解釋
協調法律
  • approximation : n. 1. 接近；近似。2. 【數學】近似值。3. 概算，略計。
  • of : OF ＝Old French 古法語。
  • laws : int. ＝ law2.
  1. By the polygonal approximation method, a global approximation solution is constructed for the initial - boundary value problem of nonconvex scalar conservation laws with two - side boundary effect, and its convergence to the global weak entropy solution of the corresponding problem is proved

    摘要使用折線逼近法，對具有兩條邊界影響的非凸單個守恆律初邊值問題構造了整體近似解，並證明其收斂到初邊值問題的整體弱熵解。
  2. Double variable technique is used by kruzkov in 70 ' s to obtain the existence, uniqueness and regularity of entropy solution to ( 0. 2. 1 ) for the scalar case, especially the contractive properity of entropy solution. kuznetsov applied this technique to approximation of scalar hyperbolic conservation laws ( 0. 2. 1 ) in 1976

    Kruzkov 481在70年代用雙變t技巧（ doublevariableteehnique ）解決了多維單個雙曲守恆律（ 0 . 1 . 1 ）的摘解的適定性問題，即嫡解的存在性，唯一性及正規性結果，特別摘解的ll收縮性質
  3. In the new method the uncertainty of the system to be controlled is normalized firstly, and then the partition of unity that is subordinated to a open covering of state variables compact set is constructed, and the approximation is realized by using its property that can approximate nonlinear continuous function with arbitrary precision, then the decentralized adaptive robust controller of complex systems and adaptive laws of approximate parameter estimation are designed

    該方法首先對被控系統中的不確定性進行歸一化處理，進而構造出從屬于狀態變量的緊致域的一組開覆蓋的單位分解，利用其具有以任意精度逼近非線性連續函數的性質，實現了對被控系統不確定性的近似逼近，然後設計了復雜系統的分散魯棒控制器和參數估計的自適應律，並證明了這種控制器使被控系統的狀態及參數估計誤差一致終極有界。
  4. This is helpful for us to construct difference approximation schemes for hj equation with aids of schemes for conservation laws. in this paper we present a class gauss schemes with staggered grids for hj equation, based on gauss schemes with staggered grids for conservation laws

    本文，我們將hamilton - jacobi方程變化為雙曲守恆律方程，利用求解雙曲守恆律方程的交錯網格的gauss型差分格式，構造了一類求解hamilton - jacobi方程的交錯網格的gauss型差分格式。
  5. 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。
  6. The eu s european parliament and council directive of 30 june 1994 amended for the 12th time directive 76769eec on the approximation of the laws, regulations and administrative provisions of the member states relating to restrictions on the marketing and use of certain dangerous substances and preparations. the

    於一九九四年六月三十日發出的指引對第9427ec號有關限制危險品銷售及使用的指引作出第12次修訂，內載成員國就此所訂立的法例、規例及行政條文。
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