The main idea of the finite difference method is as follows: We consider the discrete difference equation with the finite alphas as approximate substitution for the differential equation with the continuous variant and boundary conditions.

有限差分方法的基本思想是用離散的在线538精品，只含有有限個未知數(shù)的差分方程去近似代替連續(xù)變量的微分方程及邊界條件成年人的网站，并把相應(yīng)的差分方程解作為微分方程的近似解。

Differential difference equation is a kind of powerful means to investigate the rule of natural phenomena, whose qualitative analysis has always been the hot spot subject to be studied in the recent years.

微分差分方程是用來描繪自然現(xiàn)象變化規(guī)律的一種有力工具91在线视频播放入口在线观看，其定性分析一直是近年來研究的熱點問題看久久久久久久一毛片。

A sufficient condition for the oscillation of bounded solutions of a kind of second order neutral differential difference equation s established.

建立了一類二階中立型微分差分方程有界解振動的充分條件，且當變系數(shù)都是常數(shù)時真实偷窥拍摄系列网站，該條件也是必要的黄色www123.；同時，根據(jù)該方程的"極限"方程建立了它自身的一個有界振動準則一级黄色毛片视频免费看。

This main approach is also coincidence degree theory. Moreover, when the time scale T is chosen as the sets of real or integer numbers, the existence of periodic solutions for its differential or difference equation are obtained respectively.

若分別選取時標T為實數(shù)集或整數(shù)集時国产91精品专区，則分別得到它的微分方程或差分方程周期解的存在性91福利网国产，這就避免了對這些生態(tài)系統(tǒng)的微分和差分方程周期解的存在性分別進行討論。

This article use the improved integral inequalities with the deviate variable and some skills of inequalities as well as related knowledge about second-order differential equation,to obtain the following results: the classification of limit point case or limit circle case and boundedness for second order differential or difference equation with deviative variable,discussed the classification for certain n-order differential equations,Criteria for the classification of second order differential equation with deviative variable.

本文利用推廣的具有偏差變元的積分不等式黄色2级视频，結(jié)合不等式的一些技巧以及常微分方程的相關(guān)知識對一類二階具有偏差變元的微分方程及一類二階差分方程極限圓型的分類問題作了相關(guān)的研究工作亚洲无码一级在线视频，并且討論了一類n階具有偏差變元的常微分方程解的平方可積性與有界性和一類二階非線性具有偏差變元的微分方程解的有界性。

Under suit upper and lower solution, iteration sequences were constructed, and existence and unique of solutions of linear boundary value problems on second order nonlinear Hammerstein type integro-differential-difference equation were obtained by means of applying the Arzela-Ascoli theorem Lebesque control convergence theorem and disproof method.

在上下解存在的條件下久操欧美视频，構(gòu)造迭代序列，由Arzea-Ascoli定理和Lebesque控制收斂定理得到了二階非線性Hammerstein型積分微分差分方程的線性邊值問題的解的存在性午夜性爱福利视频。再利用反證法獲得了解的唯一性www天堂在线亚洲av。

So CLawDDEs can be used as an effective tool to test the integrability of nonlinear differential-difference equations.

因此，CLawDDEs可作為測試非線性微分差分方程是否可積的有效工具国产欧美同性另类色视频。

Two-point boundary value problems of second order mixed type integro-differential-difference equation is studied by means of differential inequality theories.

利用微分不等式技巧研究了某一類二階混合型積分微分差分方程的兩點邊值問題欧美性爱十八岁以下禁止进入，在上下解存在的條件下，得到了解的存在性和唯一性定理中文字幕在现观看。

Based on Wu's elimination method and "divide-and-conquer" strategy, the undetermined coefficient method for constructing polynomial conservation laws of nonlinear differential-difference equations was improved. Furthermore, a Maple package CLawDDEs was developed to automatically derive conserved densities and associated fluxes of polynomial differential-difference equations.

基于吳消元法和"分治"策略无码不花钱的污网站在线观看，改進了基于標度不變性構(gòu)造非線性微分差分方程多項式形式守恒律的待定系數(shù)算法，并在計算機代數(shù)系統(tǒng)Maple上實現(xiàn)了改進后的算法十八禁www，其中的軟件包CLawDDEs可自動推導出微分差分方程的守恒密度及連帶流人人操av综合网。

Main contents are as follows :In chapter one, we give a survey to the development and current state of the oscillation of differential equations and difference equations. We also introduce some preliminary material , including some basic concepts of the oscillation theory and some important fixed point theorems.In chapter two, we investigate the oscillation of second order self-conjugate differential equation with impulses.

本文由五章組成，主要內(nèi)容如下：第一章概述了微分方程及差分方程的應(yīng)用背景和國內(nèi)五月丁香婷中文、外研究狀況爱青岛黄色网站推荐，這一章也包括一些預備知識，如有關(guān)微分方程日本欧美国产中文字幕、差分方程理論的基本概念和重要的不動點定理人人干人人弄人人插。

adjoint difference equation：伴隨差分方程

adjoint determinant 伴隨行列式 | adjoint difference equation 伴隨差分方程 | adjoint differential equation 伴隨微分方程

difference differential equation：差分微分方程

dielectric strain 電介質(zhì)應(yīng)變 | difference differential equation 差分微分方程 | difference equation 差分方程

difference differential equation：微分差分方程,差微分方程=>差分微分方程式

difference voltmeter 差值電壓表 | difference-differential equation 微分差分方程,差微分方程=>差分微分方程式 | difference-differentialequation 差分微分方程

ordinary difference differential equation：常差分微分方程

ordinary carbon steel 普通碳鋼 | ordinary difference differential equation 常差分微分方程 | ordinary difference equation 常差分方程

differential difference equation：微分-差分方程

differential diagnosis 鑒別診斷 | differential-difference equation 微分-差分方程 | differential dilatometry 差示熱膨脹法

ordinary difference equation：常差分方程

ordinary difference differential equation 常差分微分方程 | ordinary difference equation 常差分方程 | ordinary differential equation 常微分方程

difference equation model：差分方程模型

diaphragm pressure gauge 膜片壓力表 | difference equation model 差分方程模型 | differential dynamical system 微分動力學系統(tǒng)

linear difference equation：線性差分方程

linear dependence 線性關(guān)系 | linear difference equation 線性差分方程 | linear differential equation 線性微分方程

LDE Linear Difference Equation：線性差分方程

LDE Line Drawing Editor 線路制圖編輯器 | LDE Linear Difference Equation 線性差分方程 | LDE Linear Differential Equation 線性微分方程

linear constant-coefficient difference equation：線性常系數(shù)差分方程

144 Linear constant-coefficient differential equation 線性常系數(shù)微分方程 | 145 Linear constant-coefficient difference equation 線性常系數(shù)差分方程 | 147 Linear feedback system 線性反饋系統(tǒng)