期刊文献+
共找到405篇文章
< 1 2 21 >
每页显示 20 50 100
Computational Stability of the Explicit Difference Schemes of the Forced Dissipative Nonlinear Evolution Equations 被引量:1
1
作者 林万涛 季仲贞 王斌 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2001年第3期413-417,共5页
The computational stability of the explicit difference schemes of the forced dissipative nonlinear evolution equations is analyzed and the computational quasi-stability criterion of explicit difference schemes of the ... The computational stability of the explicit difference schemes of the forced dissipative nonlinear evolution equations is analyzed and the computational quasi-stability criterion of explicit difference schemes of the forced dissipative nonlinear atmospheric equations is obtained on account of the concept of computational quasi-stability, Therefore, it provides the new train of thought and theoretical basis for designing computational stable difference scheme of the forced dissipative nonlinear atmospheric equations. Key words Computational quasi-stability - Computational stability - Forced dissipative nonlinear evolution equation - Explicit difference scheme This work was supported by the National Outstanding Youth Scientist Foundation of China (Grant No. 49825109), the Key Innovation Project of Chinese Academy of Sciences (KZCX1-10-07), the National Natural Science Foundation of China (Grant Nos, 49905007 and 49975020) and the Outstanding State Key Laboratory Project (Grant No. 40023001). 展开更多
关键词 Computational quasi-stability Computational stability Forced dissipative nonlinear evolution equation Explicit difference scheme
下载PDF
THE STABILITY OF DIFFERENCE SCHEMES OF A HIGHER DIMENSIONAL PARABOLIC EQUATION
2
作者 孙其仁 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 1991年第12期1209-1215,共7页
This paper proposes a new method to improve the stability condition of difference scheme of a parabolic equation. Necessary and sufficient conditions of the stability of this new method are given and proved. Some nume... This paper proposes a new method to improve the stability condition of difference scheme of a parabolic equation. Necessary and sufficient conditions of the stability of this new method are given and proved. Some numerical examples show that this method has some calculation advantages. 展开更多
关键词 stability condition parabolic equation difference scheme
下载PDF
An Explicit Difference Scheme with High Accuracy and Branching Stability for Solving Parabolic Partial Differential Equation 被引量:4
3
作者 马明书 王肖凤 《Chinese Quarterly Journal of Mathematics》 CSCD 2000年第4期98-103,共6页
This paper presents an explicit difference scheme with accuracy and branching stability for solving onedimensional parabolic type equation by the method of undetermined parameters and its truncation error is O(△t4+△... This paper presents an explicit difference scheme with accuracy and branching stability for solving onedimensional parabolic type equation by the method of undetermined parameters and its truncation error is O(△t4+△x4). The stability condition is r=a△t/△x2<1/2. 展开更多
关键词 parabolic type equation explicit difference scheme high accuracy branching stability truncation er
下载PDF
A High-order Accuracy Explicit Difference Scheme with Branching Stability for Solving Higher-dimensional Heat-conduction Equation 被引量:3
4
作者 MA Ming-shu MA Ju-yi +1 位作者 GU Shu-min ZHU Lin-lin 《Chinese Quarterly Journal of Mathematics》 CSCD 北大核心 2008年第3期446-452,共7页
A high-order accuracy explicit difference scheme for solving 4-dimensional heatconduction equation is constructed. The stability condition is r = △t/△x^2 = △t/△y^2 = △t/△z^2 = △t/△w^2 〈 3/8, and the truncatio... A high-order accuracy explicit difference scheme for solving 4-dimensional heatconduction equation is constructed. The stability condition is r = △t/△x^2 = △t/△y^2 = △t/△z^2 = △t/△w^2 〈 3/8, and the truncation error is O(△t^2 + △x^4). 展开更多
关键词 heat-conduction equation explicit difference scheme high-order accuracy branching stability
下载PDF
The Stability Research for the Finite Difference Scheme of a Nonlinear Reaction-diffusion Equation 被引量:6
5
作者 XU Chen-mei 《Chinese Quarterly Journal of Mathematics》 CSCD 北大核心 2008年第2期222-227,共6页
In the article, the fully discrete finite difference scheme for a type of nonlinear reaction-diffusion equation is established. Then the new function space is introduced and the stability problem for the finite differ... In the article, the fully discrete finite difference scheme for a type of nonlinear reaction-diffusion equation is established. Then the new function space is introduced and the stability problem for the finite difference scheme is discussed by means of variational approximation method in this function space. The approach used is of a simple characteristic in gaining the stability condition of the scheme. 展开更多
关键词 reaction-diffusion equation finite difference scheme stability research variational approximation method
下载PDF
Improving the Stability Problem of the Finite Difference Scheme for Reaction-diffusion Equation 被引量:2
6
作者 XU Chen-mei 《Chinese Quarterly Journal of Mathematics》 CSCD 北大核心 2008年第3期403-408,共6页
This paper deals with the special nonlinear reaction-diffusion equation. The finite difference scheme with incremental unknowns approximating to the differential equation (2.1) is set up by means of introducing incr... This paper deals with the special nonlinear reaction-diffusion equation. The finite difference scheme with incremental unknowns approximating to the differential equation (2.1) is set up by means of introducing incremental unknowns methods. Through the stability analyzing for the scheme, it was shown that the stability conditions of the finite difference schemes with the incremental unknowns are greatly improved when compared with the stability conditions of the corresponding classic difference scheme. 展开更多
关键词 reaction-diffusion equation difference scheme stability problem incremental unknowns
下载PDF
Construction of Explicit Quasi-complete Square Conservative Difference Schemes of Forced Dissipative Nonlinear Evolution Equations 被引量:1
7
作者 林万涛 季仲贞 王斌 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2001年第4期604-612,共2页
Based on the forced dissipetive nonlinear evolution equations for describing the motion of atmosphere and ocean, the computational stability of the explicit difference schemes of the forced dissipotive nonlinear atmos... Based on the forced dissipetive nonlinear evolution equations for describing the motion of atmosphere and ocean, the computational stability of the explicit difference schemes of the forced dissipotive nonlinear atmospheric and oceanic equations is analyzed and the computationally stable explicit complete square conservative difference schemes are constructed. The theoretical analysis and numerical experiment prove that the explicit complete square conservative difference schemes are computationally stable and deserve to be disseminated. 展开更多
关键词 Forced dissipative nonlinear evolution equation Explicit quasi-complete square conservative difference scheme Computational stability
下载PDF
A Class of High Accuracy Explicit Difference Schemes for Solving the Heat-conduction Equation of High-dimension 被引量:1
8
作者 CHEN Zhen-zhong MA Xiao-xia 《Chinese Quarterly Journal of Mathematics》 CSCD 2010年第2期236-243,共8页
In this paper, a class of explicit difference schemes with parameters for solving five-dimensional heat-conduction equation are constructed and studied.the truncation error reaches O(τ^2+ h%4), and the stability c... In this paper, a class of explicit difference schemes with parameters for solving five-dimensional heat-conduction equation are constructed and studied.the truncation error reaches O(τ^2+ h%4), and the stability condition is given. Finally, the numerical examples and numerical results are presented to show the advantage of the schemes and the correctness of theoretical analysis. 展开更多
关键词 heat-conduction equation explicit difference scheme truncation error conditional stability
下载PDF
Numerical Analysis of Upwind Difference Schemes for Two-Dimensional First-Order Hyperbolic Equations with Variable Coefficients 被引量:1
9
作者 Yanmeng Sun Qing Yang 《Engineering(科研)》 2021年第6期306-329,共24页
In this paper, we consider the initial-boundary value problem of two-dimensional first-order linear hyperbolic equation with variable coefficients. By using the upwind difference method to discretize the spatial deriv... In this paper, we consider the initial-boundary value problem of two-dimensional first-order linear hyperbolic equation with variable coefficients. By using the upwind difference method to discretize the spatial derivative term and the forward and backward Euler method to discretize the time derivative term, the explicit and implicit upwind difference schemes are obtained respectively. It is proved that the explicit upwind scheme is conditionally stable and the implicit upwind scheme is unconditionally stable. Then the convergence of the schemes is derived. Numerical examples verify the results of theoretical analysis. 展开更多
关键词 Two-Dimensional First-Order Hyperbolic equation Variable Coefficients Upwind difference schemes Fourier Method stability and Error Estimation
下载PDF
A CLASS OF TWO-LEVEL EXPLICIT DIFFERENCE SCHEMES FOR SOLVING THREE DIMENSIONAL HEAT CONDUCTION EQUATION 被引量:1
10
作者 曾文平 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2000年第9期1071-1078,共8页
A class of two-level explicit difference schemes are presented for solving three-dimensional heat conduction equation. When the order of truncation error is 0(Deltat + (Deltax)(2)), the stability condition is mesh rat... A class of two-level explicit difference schemes are presented for solving three-dimensional heat conduction equation. When the order of truncation error is 0(Deltat + (Deltax)(2)), the stability condition is mesh ratio r = Deltat/(Deltax)(2) = Deltat/(Deltay)(2) = Deltat/(Deltaz)(2) less than or equal to 1/2, which is better than that of all the other explicit difference schemes. And when the order of truncation error is 0((Deltat)(2) + (Deltax)(4)), the stability condition is r less than or equal to 1/6, which contains the known results. 展开更多
关键词 three-dimensional heat conduction equation explicit difference scheme truncation error stability condition
下载PDF
A new method for judging the computational stability of the difference schemes of nonlinear evolution equations 被引量:18
11
作者 LIN Wantao Jl Zhongzhen +1 位作者 WANG Bin YANG Xiaozhong 《Chinese Science Bulletin》 SCIE EI CAS 2000年第15期1358-1361,共4页
For the non-conservative difference schemes of nonlinear evolution equations with aperiodic boundary conditions, taken one-dimensional nonlinear advection equation as an example, a new method for judging the computati... For the non-conservative difference schemes of nonlinear evolution equations with aperiodic boundary conditions, taken one-dimensional nonlinear advection equation as an example, a new method for judging the computational stability is given. It is proved to be practical and effective through several numerical examples. The stability criteria obtained by this method are really the necessary conditions of computational stability. 展开更多
关键词 nonlinear evolution equation difference scheme COMPUTATIONAL stability HEURISTIC analysis.
原文传递
A Comparative Analysis of Computational Stability for Linear and Non-Linear Evolution Equations 被引量:5
12
作者 林万涛 季仲贞 王斌 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2002年第4期699-704,共6页
For several difference schemes of linear and non-linear evolution equations, taking the one-dimensional linear and non-linear advection equations as examples, a comparative analysis for computational stability is carr... For several difference schemes of linear and non-linear evolution equations, taking the one-dimensional linear and non-linear advection equations as examples, a comparative analysis for computational stability is carried out and the relationship between non-linear computational stability, the construction of difference schemes, and the form of initial values is discussed. It is proved through comparative analysis and numerical experiment that the computational stability of the difference schemes of the non-linear evolution equation are absolutely different from that of the linear evolution equation. 展开更多
关键词 evolution equation difference scheme computational stability initial value
下载PDF
Study of Stability Criteria of Numerical Solution of Ordinary and Partial Differential Equations Using Eulers and Finite Difference Scheme
13
作者 AHMAD Najmuddin CHARAN Shiv 《Journal of Partial Differential Equations》 CSCD 2022年第3期281-288,共8页
In this paper we have discussed solution and stability analysis of ordinary and partial differential equation with boundary value problem.We investigated periodic stability in Eulers scheme and also discussed PDEs by ... In this paper we have discussed solution and stability analysis of ordinary and partial differential equation with boundary value problem.We investigated periodic stability in Eulers scheme and also discussed PDEs by finite difference scheme.Numerical example has been discussed finding nature of stability.All given result more accurate other than existing methods. 展开更多
关键词 stability ordinary and partial differential equations Eulers and finite difference scheme
原文传递
Optimized finite difference iterative scheme based on POD technique for 2D viscoelastic wave equation 被引量:1
14
作者 Hong XIA Zhendong LUO 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2017年第12期1721-1732,共12页
This study develops an optimized finite difference iterative (OFDI) scheme for the two-dimensional (2D) viscoelastic wave equation. The OFDI scheme is obtained using a proper orthogonal decomposition (POD) metho... This study develops an optimized finite difference iterative (OFDI) scheme for the two-dimensional (2D) viscoelastic wave equation. The OFDI scheme is obtained using a proper orthogonal decomposition (POD) method. It has sufficiently high accuracy with very few unknowns for the 2D viscoelastic wave equation. Existence, stability, and convergence of the OFDI solutions are analyzed. Numerical simulations verify efficiency and feasibility of the proposed scheme. 展开更多
关键词 optimized finite difference iterative (OFDI) scheme viscoelastic wave equation proper orthogonal decomposition (POD) EXISTENCE stability CONVERGENCE numericalsimulation
下载PDF
A Crank-Nicolson Difference Scheme for Generalized Rosenau Equation 被引量:1
15
作者 胡劲松 王玉兰 徐友才 《Journal of Southwest Jiaotong University(English Edition)》 2010年第3期254-259,共6页
Much effort has been devoted to researching the common Rosenau equation, but the numerical method of it has not been studied. In this paper, a conservative Crank-Nicolson difference scheme for an initial-boundary valu... Much effort has been devoted to researching the common Rosenau equation, but the numerical method of it has not been studied. In this paper, a conservative Crank-Nicolson difference scheme for an initial-boundary value problem of the generalized Rosenau equation is proposed. Existence and uniqueness of numerical solutions are derived. By method of discrete energy, the second order convergence and stability are discussed. Numerical examples demonstrate the theoretical results. 展开更多
关键词 Generalized Rosenau equation difference scheme Conservative rule CONVERGENCE stability
下载PDF
Analysis of an Implicit Finite Difference Scheme for Time Fractional Diffusion Equation 被引量:1
16
作者 MA Yan 《Chinese Quarterly Journal of Mathematics》 2016年第1期69-81,共13页
Time fractional diffusion equation is usually used to describe the problems involving non-Markovian random walks. This kind of equation is obtained from the standard diffusion equation by replacing the first-order tim... Time fractional diffusion equation is usually used to describe the problems involving non-Markovian random walks. This kind of equation is obtained from the standard diffusion equation by replacing the first-order time derivative with a fractional derivative of order α∈(0, 1). In this paper, an implicit finite difference scheme for solving the time fractional diffusion equation with source term is presented and analyzed, where the fractional derivative is described in the Caputo sense. Stability and convergence of this scheme are rigorously established by a Fourier analysis. And using numerical experiments illustrates the accuracy and effectiveness of the scheme mentioned in this paper. 展开更多
关键词 time fractional diffusion equation finite difference approximation implicit scheme stability CONVERGENCE EFFECTIVENESS
下载PDF
THE 3-LAYERED EXPLICIT DIFFERENCE SCHEME FOR 2-D HEAT EQUATION
17
作者 刘继军 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2003年第5期605-613,共9页
A 3-layered explicit difference scheme for the numerical solution of 2-D heat equation is proposed. Firstly, a general symmetric difference scheme is constructed and its optimal error is obtained. Then two kinds of co... A 3-layered explicit difference scheme for the numerical solution of 2-D heat equation is proposed. Firstly, a general symmetric difference scheme is constructed and its optimal error is obtained. Then two kinds of condition for choosing the parameters for optimal error and stable difference scheme are given. Finally, some numerical results are presented to show the advantage of the schemes. 展开更多
关键词 parabolic equation difference schemes error estimate stability
下载PDF
On the Conservative Finite Difference Scheme for the Generalized Novikov Equation
18
作者 Wenxia Chen Qianqian Zhu Ping Yang 《Journal of Applied Mathematics and Physics》 2017年第9期1776-1790,共15页
In this paper, we investigate a numerical method for the generalized Novikov equation. We propose a conservative finite difference scheme and use Brouwer fixed point theorem to obtain the existence of the solution of ... In this paper, we investigate a numerical method for the generalized Novikov equation. We propose a conservative finite difference scheme and use Brouwer fixed point theorem to obtain the existence of the solution of the corresponding difference equation. We also prove the convergence and stability of the solution by using the discrete energy method. Moreover, we obtain the truncation error of the difference scheme which is . 展开更多
关键词 Generalized NOVIKOV equation Finite difference scheme CONSERVATION Law stability Convergence
下载PDF
Convergence on Finite Difference Solution for Semilinear Wave Equation in One Space Variable
19
作者 鲁百年 房少梅 《Chinese Quarterly Journal of Mathematics》 CSCD 1997年第3期35-40, ,共6页
In this paper,the convergence and stability of the ’Leap-frog’ finite difference scheme for the semilinear wave equation are proved by using of the bounded extensive method under more generalized condition for the n... In this paper,the convergence and stability of the ’Leap-frog’ finite difference scheme for the semilinear wave equation are proved by using of the bounded extensive method under more generalized condition for the nonlinear term. The more complex standard a priori estimates are avoided so that the theoretical results are complemented for the scheme which was presented by Perring and Skyrne (1962). 展开更多
关键词 semilinear wave equation Leap-frog finite difference scheme convergence and stability
下载PDF
Computational stability of the forced dissipative nonlinear atmospheric equations 被引量:5
20
作者 LI Jianping and CHOU Jifan LASG , Institute of Atmospheric Physics , Chinese Academy of Sciences , Beijing 100080, China Department of Atmospheric Sciences , Lanzhou University , Lanzhou 730000, China Beijing Meteorological College, Beijing 100081, China 《Chinese Science Bulletin》 SCIE EI CAS 1999年第10期949-952,共4页
A new concept of computational quasi-stability (CQS) is introduced to study the computational stability (CS) of the forced dissipative nonlinear (FDN) evolution equations. Based on the concept, the CQS criterion of di... A new concept of computational quasi-stability (CQS) is introduced to study the computational stability (CS) of the forced dissipative nonlinear (FDN) evolution equations. Based on the concept, the CQS criterion of difference scheme of FDN atmospheric equations is obtained. So it provides the theoretical basis for designing the computational stable difference scheme of FDN atmospheric equations. 展开更多
关键词 COMPUTATIONAL stability (CS) COMPUTATIONAL quasi-stability (CQS) operator equation difference scheme FORCED DISSIPATIVE NONLINEAR (FDN) equations.
原文传递
上一页 1 2 21 下一页 到第
使用帮助 返回顶部