The general correlation theories are presented to discuss the existence condition of a variation principle, which is named as the athwart problem of a variation principle.

本文較為系統(tǒng)地討論了建立變分定理的前提條件(本文稱之為變分定理的逆問題)的具有普適性的泛函相關(guān)理論国产第一页国产精品。

The equation was solved on the basis of the theory of forced damped vibration and variation principle.

再由受迫阻尼振動原理和變分原理推導出耳膜振動方程欧美性爱在线电一影。

Applying energy variation principle, we give equation s defining parameters in flexural function, stability equation , frequency equation , and general formulae of minimum critical force and minimum eigenfrequency as well.

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We present the fundamental theories of Noether symmetries and conserved quantities of mechanco-electrical dynamical systems, including variation principle of the system, Noether symmetry transformation, Noether quasi-symmetry transformation, generalized Noether quasi-symmetry transformation, Killing equations, Noether theorem, the form of conserved quantity. And then the basic theory of Lie symmetry is advanced, including the determining equation, structure equation and the form of conserved quantity.

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The main problems researched in the dissertation and achievements are as follows: The dissertation explains the science background and the theoretical and actual meaning of the task. The progress and the problems of the flow imaging technique are briefly explained. The advantages of electrical capacitance tomography are discussed. The paper discusses the formation and operating principle of ECT, and builds up the definite mathematical model by detail theoretical analyse, and establishes the Finite Element Model of the system by changing the finite boundary value problem of ECT into equivalence variation problem according to variation principle. On the basis of the FEM of the system, the paper builds the finite element model of the capacitance sensitivity field distribution and programs its finite element simulation software and proves the validity of the FEM of the ECT from different aspects. With the FEM and the qualitative analyse of the effect of each structural parameter of the capacitance transducer on its capability, this paper optimizes the structural parameters of the capacitance transducer, and obviously improves its capability. The compare of the simulated result with the static experimental result shows that the error of them is less than 0.9%.

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Basing on the variation principle of solid-fluid coupled problem,on the situation of the tank being full filled,the essential method and principle have been found by using the numerical approximation of finite element method.

在罐車滿載的情況下日韩福利国内主播在线观看，根據(jù)固液耦合問題的廣義變分原理黄片黑人，使用有限元的近似數(shù)值計算方法，找到解決滿載罐車液固耦合振動問題的基本方法和原理91精品资源粉嫩人妻，建立鐵路罐車的固液耦合問題的動力學控制方程色系综合网，并通過算例驗證液體對罐車耦合振動的影響，得到在工程上所需要的分析結(jié)果一级特黄a爱激情影院。

Based on the theory of physics and material mechanics, this paper analyses the variation principle of the paper ribbon tension between each printing unit; establishes the mathematic model of unwinding, tension variation between each printing unit and the dynamics model of the dancer rollers.

基于無軸試驗平臺建立了紙卷開卷的數(shù)學模型性交配网站、機組之間張力變化的數(shù)學模型以及張力調(diào)節(jié)輥的動力學模型。

On the base of other researcher, the *** from the basic equations of stable current field to derived the expressions of boundary problems under 3-D condition. Without considering the EM effect and using the generalized variation principle, we can get the corresponding variation equation. Thronging subdivide the 3-D model, interpolation, analysis, and general synthesis with the triangular prism element, we can carry out the simulation on frequency-domain IP\'s parameters under level and undulate topography.

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Based on variation principle, a free vibration variation-integration equation of cantilever curved pipe for conveying fluid is derived. This is a bending-torsion-fluid tree phase coupled dynamics problem. It is difficult to uncouple and to obtain bending and torsion analytic solution separately. We can only look for approximate solution or numeral results.

根據(jù)變分原理導出了懸臂輸液曲管的變分－積分方程型男操干美女破处视频网站，這是彎曲－扭轉(zhuǎn)－流體三相藕合的動力學問題，無法解藕而單獨求出彎曲和扭轉(zhuǎn)的解析解午夜激情毛片在线播放，只能作近似計算88黄色网站。

Based on the Hamiltons principle and the displacement variation principle, one-dimensional discrete finite element method is developed for vibration analysis of thin-walled members.

對于動力分析部分，概述了Hamilton原理日韩最新在线观看网址，并由位移變分原理出發(fā)推導出考慮剪力滯效應的薄壁桿件振動的一維離散有限元法国产情侣A片A毛片。