The basic idea is to set a continuous solution of the region with a finite number of discrete points instead of a grid consisting of, these discrete points called grid nodes the solution of a continuous area on a given function of continuous variables used in the definition of discrete grid variable function approximation the original equation and boundary conditions in the micro-business operators to approximate differential, integral with the points and to approximate, so the original differential equations and boundary conditions are replaced by algebraic equations near Side, that is, finite difference equations , solve this equation group can get the original problem in discrete points on the approximate solution.

基本思想是把連續(xù)的定解區(qū)域用有限個離散點構(gòu)成的網(wǎng)格來代替caopeng碰公开在线视频，這些離散點稱作網(wǎng)格的節(jié)點A片视频在线一区二区；把連續(xù)定解區(qū)域上的連續(xù)變量的函數(shù)用在網(wǎng)格上定義的離散變量函數(shù)來近似98在线视屏；把原方程和定解條件中的微商用差商來近似国产av中文高清在，積分用積分和來近似免费在线看黄国产，于是原微分方程和定解條件就近似地代之以代數(shù)方程組91国内在线高清，即有限差分方程組，解此方程組就可以得到原問題在離散點上的近似解。

The main content of the study includes: the policy variables are classified into two types, which are continuous policy variable and discrete policy variable, and the two variable is analyzed respectively; as to the continuous policy variable, use reasonable weighting to synthesize comprehensive policy indicator to reflect the comprehensiveness of each main policy indicator; undertake regression analysis for the comprehensive policy indicator, economic and stock market variable and get the effect of all kinds of comprehensive policy indictor variables on the economy and stock market; undertake regression analysis for data on the economic indicator and the data on the stock market and get the relationship between the economy and the stock market; use event research method to analyze its effect on the stock market and get some corresponding conclusions; structure the differential or difference equation groups on the interactive relationship among the variable economy, stock market and policy and do the difference operation and constitute simultaneous equation with the original main variables one after another; use quantitative regression method and solve the coefficient of the simultaneous equation to predict the operating tendency.

本研究主要內(nèi)容包括：將政策變量劃分為連續(xù)性政策變量和離散政策變量兩個類型免费特黄一级欧美片久久久久，并分別進(jìn)行分析欧美美女高潮潮喷；對于連續(xù)性政策變量，采取合理的權(quán)重來合成政策綜合指標(biāo)一级黄色网站视频免费，反映各主要政策指標(biāo)的綜合力度大新闾迕琅扇诵源笃悠挡シ磐尽；將各政策綜合指標(biāo)與經(jīng)濟(jì)人人艹网站、股市變量進(jìn)行回歸分析你懂得在线电影，獲得各類政策綜合指標(biāo)變量對經(jīng)濟(jì)、股市影響程度的大信访谰肥悠?区2区∨分萑锻罚粚⒔?jīng)濟(jì)指標(biāo)數(shù)據(jù)與股市數(shù)據(jù)進(jìn)行回歸分析，獲得經(jīng)濟(jì)與股市之間關(guān)系的大泄琅夥袮V片在线播放』粕砺墼谙吖劭矗徊扇∈录芯糠椒▉矸治銎鋵墒械挠绊懗潭龋粯?gòu)建關(guān)于經(jīng)濟(jì)国产色色激情、股市與政策各主要變量之間互動關(guān)系的微分或差分方程組日日射日日插日日干，進(jìn)行差分運算，并以此與原來各主要變量組成聯(lián)立方程永久AV网站；運用計量回歸方法永不卡的黄色网站，求出聯(lián)立方程系數(shù)用于預(yù)測。

Space fractional differential equation ; finite difference approximation ; stability ; convergence

空間分?jǐn)?shù)階微分方程无码下体流水性视频；顯式有限差分格式欧美性视屏；隱式有限差分格式；穩(wěn)定性分析亚洲已满18岁点击进入久久；收斂性分析

The main contents of this course include: the construction, convergence, compatibility and stability of finite difference scheme of elliptic equation, parabolic equation and hyperbolic equation, the construction method and computation format of finite difference scheme of a system of partial differential equations.

本課程主要內(nèi)容有：橢圓型方程的有限差分格式的構(gòu)造亚洲AV六月丁香七月婷婷，有限差分格式的收斂性，相容性及穩(wěn)定性伊人网免费视频、拋物型方程的有限差分格式的構(gòu)造天堂2019AV在线观看，有限差分格式的收斂性，相容性及穩(wěn)定性一级牲活片在线观看、雙曲型方程的有限差分格式的構(gòu)造自拍偷拍2020，有限差分格式的收斂性，相容性及穩(wěn)定性超碰国产在线观看、偏微分方程組的有限差分格式的構(gòu)造方法及有關(guān)的計算格式亚洲精品区第3页。

In chapter two,we consider a lumped mass generalized difference scheme for linear integro-differential equation in two dimensions.Lp and error estimates of the generalized Ritz-Volterra projection u ? V and and -norm error estimates of Dk = 1,2 are made,then we obtain and -norm error estimates of u?

第二章考慮二維線性積分微分方程的廣義差分集中質(zhì)量法，建立了廣義Ritz-Volterra投影黄色视频三级片AAAAAAAAA，得到u-V_h~*u的W~(1国产福利一区二区大秀视频，p)和L~p(2≤p≤∞)模誤差估計和D_t~k中文字幕久久精品无码综合网泰国，k=1，2的V~p和W~(1在线欧美亚洲黄，p)(2≤p≤∞)模誤差估計色无码免费视频一区二区，從而得到u-u_h的最優(yōu)W~(1，p)和L~p(2≤p≤∞)模誤差估計亚洲日韩激情无码一区。

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婷婷六月丁香官网，在上下解存在的條件下，得到了解的存在性和唯一性定理国产高清一级A片在线视频爱微。

The impact of capillary pressure on twophase flow in waterwettish reservoir is studied. The one dimensional control differential equation is derived,and solved by numerical limited difference method.

首先建立一維滲流模型和相應(yīng)的滲流微分控制方程国产Aⅴ一区二区三区四区，用數(shù)值差分的方法進(jìn)行求解，并繪制產(chǎn)量圖和采出程度圖黄色国产免费国产，分析啟動壓力梯度和毛管力對水驅(qū)油效果的影響黄黄色色爱爱网。

Up to now, finite difference method, finite element method and boundary element method are common numerical methods to obtain numerical solutions of parabolic partial differential equation.

目前求解拋物型偏微分方程的數(shù)值方法有有限差分法、有限元法和邊界元法等国产在线一区二区三区麻豆。

First, the paper proves the well-posedness of the encryption and decryption problems, which provides theoretical bases for experiments of encryption and decryption; Then presents a fast iterative algorithm, which is proposed based on the special sparse structure of the coefficient matrix of the two-dimensional C-N difference scheme, and successfully experiments on images encryption and decryption; At the end, the security of the methods of images encryption and decryption based on the two-dimensional Pseudo -parabolic Partial Differential Equation is experimented and discussed particularly.

首先證明了基于二維連續(xù)模型的加久久久久精品日韩久久久、解密問題是適定的，為加欧美一级夜夜爽、解密實驗提供了理論依據(jù)黄色视频免在线观看免费；然后根據(jù)模型的二維C-N格式系數(shù)矩陣的特殊稀疏結(jié)構(gòu)，給出快速迭代求解算法九九在线精品免费视频，并成功地進(jìn)行了圖像加黄色视频在线观看视频在线播放、解密的數(shù)值試驗；最后對基于二維偽拋物型方程的圖像加自拍高潮日韩在线视频播放免费观看、解密方法的安全性進(jìn)行了詳細(xì)的試驗討論精品国产福利第一区二区。

Therefore,it is necessary to research diffusion equation for suspended sediment because it describes the sediment move process in the water body.The equation is a various coefficients second-order linear partial differential equa-tion,such equation under complex boundary condition is very difficult to get its analytical solution,while its numerical solution relative analytical solution is more easier and has the obvious superiority:simple,the computation convenience.but to get a kind of difference format which is good accuracy and stability is not easy.

泥沙擴(kuò)散方程實際上是一個變系數(shù)的二階線性偏微分方程，這樣的方程在各種復(fù)雜邊界條件下求解是十分困難的国产一区精品福利，求它的解析解在數(shù)學(xué)上存在著難以克服的障礙高清一级黄色视频，無法求出其精確解，因此常用數(shù)值方法求它的近似解国产黄色对白视频，相比較而言狂野殴美激情性XXXX，數(shù)值方法有著明顯的優(yōu)勢：即簡單靈活、計算方便快捷亚洲黄色，但要尋找一種精度高亚洲经典一区二区三区、穩(wěn)定性好、計算方便的差分格式也并非易事a人人操人人干。