In this dissertation, a semi-discrete method-the discrete method of separation of variables is proposed for solving the composite materials problem on a polygon.

本文研究求解帶奇性的二階橢圓型方程超碰人人人福利、復(fù)合材料問題及不可壓材料問題的離散分離變量法人人费人人操。

In chapter 2, we firstly introduce the model of a discrete-time neural network with generalized input-output function. The model generalizes the input-output function in transiently chaotic neural network to a class of continuous, differentiable and monotone increasing functions. Secondly we study the uniformly asymptotical stability of equilibrium in the non-autonomous model. Finally, several examples and numerical simulations are given to illustrate and reinforce our theories. In chapter 3, we firstly introduce a specific class of discrete-time neural network models with sinusoidal activation function.

在本文的第二章中，首先介紹了一類具有廣義輸入輸出函數(shù)的非自治離散神經(jīng)網(wǎng)絡(luò)模型亚洲另类图片专区，該模型把瞬時混沌神經(jīng)網(wǎng)絡(luò)模型中的輸入輸出函數(shù)推廣到了一般的單調(diào)遞增且連續(xù)可微的函數(shù)成人网站日韩在线视频观看；其次，利用Schauder不動點原理和利用Lyapunov函數(shù)逆定理依次證明了模型平衡點的存在性和該模型在時變權(quán)值下的一致漸近穩(wěn)定性美女被干免费网站；最后欧美2019一级免费黄片，對幾個具體的例子進行數(shù)值模擬，數(shù)值模擬的結(jié)果更好地說明了我們的結(jié)論三级做a全过程在线观看软件。

According to the discrete curvature on triangle meshes,more important features can be preserved in regions of high curvature after simplification.A method to get the new vertex after the collapse of a triangle based on discrete curvature and spherical surface estimation is also given.

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According to the concept of strain energy of cracked materials, the orientation tensor of crack was defined. Considering the crack-closing and friction between crack surface under compression, The damage tensor, damage strain and effective elastic modulus were formulated. A method for discrete description of damage mechanism was given, and the evolution equation of discrete orientation density of crack was obtained. The relationship of micromechanism and the macro-representation of concrete failure were studied.

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By using the transfer matrix method of multibody system, the hard problem of computation of the vibration characteristics of LRMLRS coupled with rigid bodies and elastic bodies is solved which is very difficult to the ordinary dynamic methods, and the vibration characteristics of LRMLRS which is varied when the number of rockets in the launch device is varied, is obtained conveniently. By developing augmented eigenvectors of the LRMLRS and its orthogonality conditions, the nonorthogonality problem of the multibody system including rigid bodies and elastic bodies is solved and the exact analysis of the dynamics response of the LRMLRS including rigid bodies and elastic bodies is realized. By using the random integer programming method, the hard optimization problem which contains continuous variables, discrete variables and random variables at the same time is solved. This method provides a technology for optimum design with random variables and discrete variables. The dynamic optimum design is realized to decrease the number of rockets consumption in the LRMLRS test. The simulation system of dispersion of fire is established by using the maximum entropy method to estimate dispersion of fire.

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A nonlinear semi-discrete model of investment dynamic system is set,and the existence and unique of solution for semi-discrete system are discussed.

建立了投資動力系統(tǒng)的一個非線性半離散模型，并討論了半離散系統(tǒng)解的存在唯一性91久久精品无码一区二区精品，給出了線性半離散系統(tǒng)穩(wěn)定的一些充分條件晚上看的91网站。

If the filter's input and output signals are discrete-time, then the filter impulse response unit is also bound to be discrete, This filter called digital filter.

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This course includes (1) Discrete time signal and systems,(2) Z transform,(3) Continuous-time signal sampling,(4) LTI system,(5) Discrete time systems,(6) Filter design,(7) DFT,(8) FFT.

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On the basis of the relation, we will prove some useful properties of the discrete Zak transform which lay the foundation for the computation of discrete Gabor transform.

利用連續(xù)Zak變換和離散Zak變換的關(guān)系，證明了離散Zak變換的一些性質(zhì)韩国一级婬乱片高清视频一。為進一步研究離散Gabor變換建立了數(shù)學(xué)基礎(chǔ)粉色毛片网址。

We will strictly derive the discrete Zak transform in more general conditions and establish the relationship between the continuous and the discrete Zak transform.

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