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.

構造了一類收斂的多參數(shù)差分格式chaopeng97，根據(jù)細分格式和差分格式的關系以及連續(xù)性條件可得到任意階連續(xù)的多參數(shù)曲線細分格式国产高清免费精品网站发国产女。

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.

對求解方程構造了一個三層隱式差分格式，消除了顯格式的穩(wěn)定性對計算步長的嚴格限制国产一级A片AV在线，使之適用范圍更廣欧美的视频，并用能量估計的方法嚴格證明了差分格式的收斂性與穩(wěn)定性，該格式對于時間和空間均具有二階收斂性一a级黄片免费看。

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化為與初值問題差分格式類似的逐步推進的形式网站免费在线观看A片，從而得出：滿足Von Neumann條件的差分格式是穩(wěn)定的格式；在相容條件下伊人久久精品婷婷热，差分格式若穩(wěn)定(或滿足VonNeumann條件)則格式收斂小黄色视频在线免费看。，且對古典解的差分逼近有誤差估計式，不再需要線性的條件亚洲网站片。

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影音先锋在线资源网看，并用待定系數(shù)法適當?shù)剡x取了這些參數(shù)的表示式，以使差分方程的截斷誤差階盡可能高地達到了O(Δt2+Δx4)日本aa；其次用穩(wěn)定性分析的Fourier方法給出了所得格式的穩(wěn)定性條件免费观看中国A片,黄色视频；然后給出了確定差分格式中參數(shù)的兩種方法，得到了一個穩(wěn)定性條件為r/3的分支穩(wěn)定的高精度顯式差分格式日韩精品更新资源在线观看视频；最后給出了數(shù)值例子神马影院成人免费网站推荐视频，數(shù)值結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。

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中国免费的黄色网站，離散微商項的同時.国产综合网在线观看，也離散非微商項，把非微商項攝動展開成網(wǎng)格步長△x的冪級數(shù)永久黄网站色视频免费APP下载，并通過提高差分格式相應修正微分方程誤差階的方法求出攝動冪級數(shù)系數(shù)久久久久精品视频这里只有精品，從而獲得高精度差分格式免费观看国产黄页网站。

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.

本課程主要內容有：橢圓型方程的有限差分格式的構造人人操人人莫人人干，有限差分格式的收斂性，相容性及穩(wěn)定性一级A片全网免费观看、拋物型方程的有限差分格式的構造粉嫩人妻一区，有限差分格式的收斂性，相容性及穩(wěn)定性偷拍一级黄片操操操视频、雙曲型方程的有限差分格式的構造啊啊啊轻点在线观看，有限差分格式的收斂性，相容性及穩(wěn)定性在线观看免费涩涩视频、偏微分方程組的有限差分格式的構造方法及有關的計算格式激情图区亚洲。

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欧美国产视频，對定常對流擴散方程中的空間微商系數(shù)進行攝動展開，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斷誤差項求出玖玖爱视频在线，由此獲得方程的隱式攝動差分格式国产91性交二区大片，將此方法應用于非定常對流擴散方程，并加以修正pirn免费毛片在线，得到該方程的修正隱式攝動差分格式日韩美女观看成人片视频在线观看免费。

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，對定常對流擴散方程中的空間微商系數(shù)進行攝動展開特级毛片A片全部免费播直播，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斷誤差項求出综合小说网，由此獲得方程的隱式攝動差分格式1024精品久久久久久久久，將此方法應用于非定常對流擴散方程，并加以修正欧美操爱视频，得到該方程的修正隱式攝動差分格式久久久久久精品免费免费69九九。

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時間差分格式對其計算穩(wěn)定性影響為理論依據(jù)，本文設計了一種新譜模式半隱式時間積分方案插插一级黄色，此方案通過對一般譜模式求解框架中那些隱含的線性項采用了一種顯式修正的差分格式操,com，可有效克服其國際譜模式半隱式時間求積方案實質上只是部分應用了半隱式差分格式的問題。

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.

在格式構造過程中指明了截斷誤差分析的局限性以及用有限差分格式構造高精度差分格式的真正困難所在亚洲中文字幕五码，并對常見的幾種差分格式從新的角度進行解釋分析欧美青年在线va。

central difference schemes：中心差分格式

關閥方案:schemes of valve shutdown | 中心差分格式:central difference schemes | 半離散格式:semi-discrete central schemes

difference schema：差分格式

difference quotient 均差 | difference schema 差分格式 | difference sequence 差數(shù)序列

difference schema method：差分格式法

difference quotient 差分商 | difference schema method 差分格式法 | differential a roximation 微分逼近

explicit difference scheme：顯式差分格式

experimental error 實驗誤差 | explicit difference scheme 顯式差分格式 | explicit differential equation 顯式微分方程

five point finite difference scheme：五點有限差分格式

five figure 五位數(shù)的 | five point finite difference scheme 五點有限差分格式 | five sided 五面的

implicit difference scheme：隱式差分格式

implicit definition 隱定義 | implicit difference scheme 隱式差分格式 | implicit differential equation 隱式微分方程

monotonicity preserving：保單調差分格式

單調差分格式 monotone difference scheme | 保單調差分格式 monotonicity preserving | 穆曼-科爾格式 Murman-Cole scheme

nine point finite difference scheme：九點有限差分格式

nine point circle 九點圓 | nine point finite difference scheme 九點有限差分格式 | niveau line 等位線

symmetric difference scheme：對稱差分格式

symmetric coordinates 對稱坐標 | symmetric difference scheme 對稱差分格式 | symmetric figure 對稱圖形

differencing scheme：差分格式

差分化 differencing | 差分格式 differencing scheme | 異奇偶性 different parity