A class of convergent difference schemes with several parameters is proposed. According to the relationship between the subdivision scheme and its difference scheme and the sufficient condition for C\+k continuity, we can devise curve subdivision schemes with arbitrary order continuity.

構(gòu)造了一類收斂的多參數(shù)差分格式，根據(jù)細(xì)分格式和差分格式的關(guān)系以及連續(xù)性條件可得到任意階連續(xù)的多參數(shù)曲線細(xì)分格式伊人中文字幕中文无码。

In order to get the numerical solution, the paper devises a three hierarchic implicit scheme which eliminates the strict restriction of explicit scheme, thus, it can be used in more areas. By using the energy estimation method, the convergence and stability of the difference scheme are proved and the scheme is second order convergence for time and space.

對求解方程構(gòu)造了一個(gè)三層隱式差分格式，消除了顯格式的穩(wěn)定性對計(jì)算步長的嚴(yán)格限制，使之適用范圍更廣免费看黄片毛片，并用能量估計(jì)的方法嚴(yán)格證明了差分格式的收斂性與穩(wěn)定性，該格式對于時(shí)間和空間均具有二階收斂性。

The difference schema of the initial boundary value problem was converted to the step-by-step form,which was similar to the difference schema of the initial value problem.It is concluded that the difference schema satisfying the Von Neumann condition is a stable schema,and that,under the consistency condition,such stable schema is convergent.Moreover,with error estimate expression for the difference approximation to the classical solution,the linearity condition is unnecessary.

引入反投影算子將發(fā)展方程初邊值問題的差分格式轉(zhuǎn)化為與初值問題差分格式類似的逐步推進(jìn)的形式欧美淫秽网址，從而得出：滿足Von Neumann條件的差分格式是穩(wěn)定的格式国产一线二线AV在线天堂；在相容條件下，差分格式若穩(wěn)定(或滿足VonNeumann條件)則格式收斂国产免费一级毛卡片AAAAA级，且對古典解的差分逼近有誤差估計(jì)式黄色网站在线免费。观看，不再需要線性的條件。

Firstly,the differential equation with parameters is given,at the same time,in order to let the truncation error of differential equation reach O(Δt~2+Δx~4) as high as possible,the method of undetermined coefficent is used to appropriately select the expression of these parameters.Secondly,the stability condition of the scheme derived is given by using the Fourier method of stability analysi...

首先給出了含參變量的差分方程欧美14初处破在线播放，并用待定系數(shù)法適當(dāng)?shù)剡x取了這些參數(shù)的表示式国产在线播放第一页，以使差分方程的截?cái)嗾`差階盡可能高地達(dá)到了O(Δt2+Δx4)；其次用穩(wěn)定性分析的Fourier方法給出了所得格式的穩(wěn)定性條件中日韩美女啪啪啪一级黄片；然后給出了確定差分格式中參數(shù)的兩種方法哪里可以看免费的av，得到了一個(gè)穩(wěn)定性條件為r/3的分支穩(wěn)定的高精度顯式差分格式；最后給出了數(shù)值例子很黄的吸乳A片免费视频，數(shù)值結(jié)果表明了本文格式較現(xiàn)有同類格式的優(yōu)越性和理論分析的正確性禁18在线观看免费。

In the PFD, both the differentials and non-differential terms in the differential equation are discretized, and the coefficients of the power series are determined by means of eliminating the truncation error of the corresponding modified scheme, then the high accurate difference scheme is obtained.

攝動有限差分方法在微分方程的差分近似中，離散微商項(xiàng)的同時(shí)日日干日日，也離散非微商項(xiàng)看久久一级毛片护士，把非微商項(xiàng)攝動展開成網(wǎng)格步長△x的冪級數(shù)，并通過提高差分格式相應(yīng)修正微分方程誤差階的方法求出攝動冪級數(shù)系數(shù)性爱免费网，從而獲得高精度差分格式欧美性交首页。

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，有限差分格式的收斂性AAAA级黄片免费看，相容性及穩(wěn)定性精品露脸国产偷人在视频0、拋物型方程的有限差分格式的構(gòu)造，有限差分格式的收斂性无码窝导航凹凸导航，相容性及穩(wěn)定性色综合免费视频在线观看、雙曲型方程的有限差分格式的構(gòu)造，有限差分格式的收斂性www.ht5668.com，相容性及穩(wěn)定性国内精品久久久久电影al换脸、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(jì)算格式。

In this paper, a high order accuracy difference method is presented for solving unsteady convection diffusion equation by using Implicit Perturbation Finite Difference scheme.

本文利用攝動差分思想免费黄色看直接网站，對定常對流擴(kuò)散方程中的空間微商系數(shù)進(jìn)行攝動展開人人砬人人摸美女，展開冪級數(shù)系數(shù)通過消去攝動格式修正微分方程的截?cái)嗾`差項(xiàng)求出，由此獲得方程的隱式攝動差分格式99re视频在线蜜，將此方法應(yīng)用于非定常對流擴(kuò)散方程黄色视频99精品视黄色小说频，并加以修正，得到該方程的修正隱式攝動差分格式亚洲欧美日韩中文视频在线观看。

In this paper, a high order accuracy difference method is presented for solving unsteady convection diffusion equation by using Implicit Perturbation Finite Difference scheme. Firstly, we use the steady convection diffusion equation, the constant coefficients of this equation are expanded to power series of grid-spacings, then the high-order Perturbation Finite Difference scheme is obtained by determining the coefficients of the power series. Put this scheme on unsteady convection diffusion equations and modified it, the IPFD scheme is constructed.

本文利用攝動差分思想日本女性WWWCOm，對定常對流擴(kuò)散方程中的空間微商系數(shù)進(jìn)行攝動展開，展開冪級數(shù)系數(shù)通過消去攝動格式修正微分方程的截?cái)嗾`差項(xiàng)求出，由此獲得方程的隱式攝動差分格式亚洲zaixianguankan，將此方法應(yīng)用于非定常對流擴(kuò)散方程日本免费高清，并加以修正，得到該方程的修正隱式攝動差分格式欧美色精品视频免费。

According to the computational stability analysis conducted to the linear term time difference scheme in simple harmonic motion equation, one new semi-implicit integration scheme also is designed. By adopting a kind of revised time-explicitdifference scheme to these linear terms still included in spectral model governing equations, this defect of spectral model only partly used in semi-implicit integrating scheme, can be overcome to some degree.

以簡諧振動方程中線性項(xiàng)時(shí)間差分格式對其計(jì)算穩(wěn)定性影響為理論依據(jù)成黄色网站免费在线免费观看，本文設(shè)計(jì)了一種新譜模式半隱式時(shí)間積分方案，此方案通過對一般譜模式求解框架中那些隱含的線性項(xiàng)采用了一種顯式修正的差分格式看黄的网战，可有效克服其國際譜模式半隱式時(shí)間求積方案實(shí)質(zhì)上只是部分應(yīng)用了半隱式差分格式的問題91国内精品久久久久精品一本。

During the process of establishing the schemes, it reveals the limitations in analyzing the truncation error and the reasons of the difficulty in improving numerical precision.

在格式構(gòu)造過程中指明了截?cái)嗾`差分析的局限性以及用有限差分格式構(gòu)造高精度差分格式的真正困難所在，并對常見的幾種差分格式從新的角度進(jìn)行解釋分析XNXX黄色小视频。