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DOMAIN DECOMPOSITION METHODS FOR SOLVING PDE's ON MULTI-PROCESSORS
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作者 康立山 Garry Rodrigue 《Acta Mathematica Scientia》 SCIE CSCD 1990年第4期459-470,共12页
In this paper, we discuss the parallel domain decomposition method(DDM)for solving PDE's on parallel computers. Three types of DDM: DDM with overlapping, DDM without overlapping and DDM with fictitious component a... In this paper, we discuss the parallel domain decomposition method(DDM)for solving PDE's on parallel computers. Three types of DDM: DDM with overlapping, DDM without overlapping and DDM with fictitious component are discussed in a uniform framework. The eonvergence of the asynchronous parallel algorithms based on DDM are discussed. 展开更多
关键词 DDM DOMAIN DECOMPOSITION methods FOR SOLVING PDE’s ON MULTI-PROCESSORS PDE
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Uncertain optimal model and solving method to platform scheduling problem in battlefield 被引量:2
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作者 Yu Sun Peiyang Yao +1 位作者 Dongdong Shui Jieyong Zhang 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2016年第1期157-165,共9页
The platform scheduling problem in battlefield is one of the important problems in military operational research.It needs to minimize mission completing time and meanwhile maximize the mission completing accuracy with... The platform scheduling problem in battlefield is one of the important problems in military operational research.It needs to minimize mission completing time and meanwhile maximize the mission completing accuracy with a limited number of platforms.Though the traditional certain models obtain some good results,uncertain model is still needed to be introduced since the battlefield environment is complex and unstable.An uncertain model is prposed for the platform scheduling problem.Related parameters in this model are set to be fuzzy or stochastic.Due to the inherent disadvantage of the solving methods for traditional models,a new method is proposed to solve the uncertain model.Finally,the practicability and availability of the proposed method are demonstrated with a case of joint campaign. 展开更多
关键词 operational research platform scheduling uncertain model solving method.
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NUMERICAL METHOD FOR SOLVING THE EULER EQUATION FOR UNSTEADY TRANSONIC FLOWS OVER OSCILLATING AIRFOILS
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作者 Li FengweiNorthwestern Polytechnical University 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 1991年第1期1-10,共10页
Through transformations, the time-dependent boundary condition on the airfoil contour and the boundary condition at infinity are brought fixed to the boundaries of a finite domain. The boundary conditions can thus be ... Through transformations, the time-dependent boundary condition on the airfoil contour and the boundary condition at infinity are brought fixed to the boundaries of a finite domain. The boundary conditions can thus be satisfied exactly without increasing the computational time. The novel scheme is useful for computing transonic, strong disturbance, unsteady flows with high reduced frequencies. The scheme makes use of curvefitted orthogonal meshes and the lattice control technique to obtain the optimal grid distribution. The numerical results are satisfactory. 展开更多
关键词 NUMERICAL METHOD FOR SOLVING THE EULER EQUATION FOR UNSTEADY TRANSONIC FLOWS OVER OSCILLATING AIRFOILS FLOW NACA
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AN ANALYTICAL METHOD FOR SOLVING INTERNAL FORCES AND DEFORMATIONS OF BAR-SYSTEM STRUCTURE IN SPACE
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作者 袁发荣 陈雪峰 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 1989年第7期623-630,共8页
In this paper, based on the idea of finite element method, the initial parametric method in bending, problem of a beam is extended to analyse the bar-system structure by employing Dirac function and llcavisidc step fu... In this paper, based on the idea of finite element method, the initial parametric method in bending, problem of a beam is extended to analyse the bar-system structure by employing Dirac function and llcavisidc step function.Then a new method for analysing the internal forces and deformations of bar-system structure in space is suggested by improving the mixed method in statically indeterminate structure.The inferred process and obtained answer will be more succinct and accurate when the problem of internal forces and deformations of bar-system structure is analysed by using the new method provided in this paper. 展开更多
关键词 AN ANALYTICAL METHOD FOR SOLVING INTERNAL FORCES AND DEFORMATIONS OF BAR-SYSTEM STRUCTURE IN SPACE
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THE CONVERGENCE OF MULTIGRID METHODS FOR SOLVING FINITE ELEMENT EQUATIONS IN THE PRESENCE OF SINGULARITIES
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作者 Y.Q. Huang Y.X. Li(Depariment of Mathematics, Xiangtan University, Hunan, China) 《Journal of Computational Mathematics》 SCIE CSCD 1995年第4期315-324,共10页
We analyze the convergence of multigrid methods applied to finite elementequations of second order with singularities caused by reentrant angles and abruptchanges in the boundary conditions. Provided much more weaker ... We analyze the convergence of multigrid methods applied to finite elementequations of second order with singularities caused by reentrant angles and abruptchanges in the boundary conditions. Provided much more weaker demand of clas-sical multigrid proofs, it is shown in this paper that, for symmetric and positivedefinite problems in the presence of singularities, multigrid algorithms with evenone smoothing step converge at a rate which is independent of the number of lev-els or unknowns. Furthermore, we extend this result to the nonsymmetric andindefinite problems. 展开更多
关键词 PRO THE CONVERGENCE OF MULTIGRID methods FOR SOLVING FINITE ELEMENT EQUATIONS IN THE PRESENCE OF SINGULARITIES
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A research on grey numerical imitation and modeling of groundwater seepage system 被引量:2
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作者 武强 李树文 +2 位作者 王义闹 董东林 武雄 《Science China Earth Sciences》 SCIE EI CAS 2001年第11期1043-1056,共14页
Based on grey set, grey numbers and their operation properties, the grey numerical model of groundwater seepage system was set up for the first time, the whole grey solving method of the model was given and it was pro... Based on grey set, grey numbers and their operation properties, the grey numerical model of groundwater seepage system was set up for the first time, the whole grey solving method of the model was given and it was proved that the common solving method of the model was only a special case of the grey solving methods. At the same time, the grey solving method was compared widely with common solving method, classical numerical method. The study shows that the grey solving method is better in depicting the procedure of transporting grey data of groundwater system. On the basis of the theoretical study, two basic kinds of cases about groundwater seepage were selected: the prediction of pit yield and the evaluation of groundwater resources on a groundwater basin. In the cases, systematical analyses were made for generalization and greylization of the hydrogeologic conditions, setting up of the grey model, identification and correction of the model as well as its prediction and evaluation. It was pointed out that when the grey numerical model is used to predict pit yield, the upper limit of the “grey band” of groundwater level cannot be higher than planed safe groundwater level, when evaluating the groundwater resource, the lower limit of the “grey band” of groundwater level cannot be lower than controlled level of groundwater. 展开更多
关键词 grey set seepage system grey numerical model grey solving method generalization and greylization
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A SMALLEST SINGULAR VALUE METHOD FOR SOLVING INVERSE EIGENVALUE PROBLEMS 被引量:1
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作者 S.F. Xu(Department of Mathematics, Peking University, Beijing) 《Journal of Computational Mathematics》 SCIE CSCD 1996年第1期23-31,共9页
Utilizing the properties of the smallest singular value of a matrix, we propose a new, efficient and reliable algorithm for solving nonsymmetric matrix inverse eigenvalue problems, and compare it with a known method. ... Utilizing the properties of the smallest singular value of a matrix, we propose a new, efficient and reliable algorithm for solving nonsymmetric matrix inverse eigenvalue problems, and compare it with a known method. We also present numerical experiments which illustrate our results. 展开更多
关键词 MATH A SMALLEST SINGULAR VALUE METHOD FOR SOLVING INVERSE EIGENVALUE PROBLEMS
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SPECTRAL-FINITE ELEMENT METHOD FOR SOLVING TWO-DIMENSIONAL VORTICITY EQUATIONS
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作者 郭本瑜 曹卫明 《Acta Mathematicae Applicatae Sinica》 SCIE CSCD 1991年第3期257-271,共15页
In this paper, we construct a spectral-finite element scheme for solving semi-periodical two-dimensional vorticity equations. The error between the genuine solution and approximate solutionis estimated strictly. The n... In this paper, we construct a spectral-finite element scheme for solving semi-periodical two-dimensional vorticity equations. The error between the genuine solution and approximate solutionis estimated strictly. The numerical results show the advantages of such a method. The techniqueused in this paper can be easily generalized to three-dimensional problems. 展开更多
关键词 SPECTRAL-FINITE ELEMENT METHOD FOR SOLVING TWO-DIMENSIONAL VORTICITY EQUATIONS
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A Goal-Type Driven Method of Solving Horn Logic with Equality
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作者 胡运发 《Journal of Computer Science & Technology》 SCIE EI CSCD 1990年第3期250-258,共9页
A new method of solving Horn logic with equality,the goal-type driven method,is presented, which considers explicitly the unification operator as a goal and merged it into the resolution process. The method has the fo... A new method of solving Horn logic with equality,the goal-type driven method,is presented, which considers explicitly the unification operator as a goal and merged it into the resolution process. The method has the following advantages.The resolution and the unification have been integrated in a uniform way.The architectures of the inference engines based on Horn logic with equality are simplified. Any techniques of exploiting AND/ OR parallelism to solve goals can also be applied to unification at the same time.The method can be used to integrate the styles of functional language and logic lan- guage by a uniform framework.It can also deal with infinite data structures. 展开更多
关键词 A Goal-Type Driven Method of Solving Horn Logic with Equality
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THE MULTIGRID METHOD OF NONCONFORMING FINITE ELEMENTS FOR SOLVING THE BIHARMONIC EQUATION
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作者 Yu Xi-jun(Computing Center, Academia Sinica, Beijing, China) 《Journal of Computational Mathematics》 SCIE CSCD 1994年第1期61-70,共10页
An optimal order of the multigrid method is given in energy-norm for the nonconforming finite element for solving the biharmonic equation, by using the nodal interpolation operator as the transfer operator between grids.
关键词 MATH THE MULTIGRID METHOD OF NONCONFORMING FINITE ELEMENTS FOR SOLVING THE BIHARMONIC EQUATION
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