As to water quality equation , limit units method is used . in this article , galerkin method is employed to calculate water quality equation , and fortran program is compiled accordingly 根据建立代数方程组的途径不同，有限元法分为迦辽金法和里兹法，这里采用迦辽金法求解；并对此求解方法编写了相应的计算程序。
Researchers suggested many numerical methods convenient for the engineering , such as the rayleigh - ritz method , galerkin method , finite difference method , finite integral method , finite element method , etc 研究人员先后提出了便于工程应用的瑞利-里兹法、伽辽金法、有限差分法、有限积分法、有限单元法等数值计算方法。
The sub - domain is used to solve the entire equivalence current integral equation . two sub - domain basis functions are adopted respectively to calculated the rcs of electrically large metallic plate in plane wave illumination 分别采用脉冲基点匹配法和rwg基伽略金法求解电大金属平板在平面波照射下的rcs ,并对二者的结果进行了比较和分析。
The advantages of efgm are : ( 1 ) only nodal datas are necessary , i . e . there is no need to join nodes into elements ; ( 2 ) high accuracy can be achieved ; ( 3 ) postprocess is easy , etc . the mathematical basis of efgm is moving least squares method 该法只需节点信息，不需将节点连成单元；此外，还有精度高、后处理方便等优点。无单元伽辽金法的数学基础是移动最小二乘法。
The surfaces of the rivet and the plate are partitioned into triangular cells , the current distribution on the patches is represented by subdomain - type basis function , the efie is translated into matrix equation by the galerkin method , then the current coefficient are obtained 铆钉和平板表面采用三角形面元进行剖分，面元上的电流分布用子域基函数表示，用伽略金法将电场方程转化为矩阵方程求解电流系数。
The closeness of the results obtained by these two methods verifies the reliability of the theory in the present paper and also shows that in solving elasto - plastic problems , efgm still possesses some advantages such as good stability and high rate of convergence 所有算例的结果都与ansys的结果进行了比较，两种计算的结果非常吻合，这验证了本文理论的可靠性。同时，算例还表明：无单元伽辽金法求解弹塑性问题时仍具有稳定性好，收敛快的优点。
The paper systematically introduces present development of element free method and the basic theory of efgm , and mainly describes the equation by which the moving least square ( mls ) is approximately used to deduce efgm , meanwhile , discusses the factors which may effect the calculation precision and , the calculation shows that this method is feasible in practice 本文系统介绍了无网格法的发展现状及无网格伽辽金法( efgm )的基本理论，着重阐述了基于移动最小二乘法的无网格伽辽金法的基本方程，并对影响计算精度的几个因素做了分析探讨。算例表明，该法解决实际问题是有效的。
All measures are related back to the original configuration . this technique is named as total lagrangian method . on the basis of nonlinear continuum mechanics , stress , strain and stress - strain relationship for large deformation are discussed , the expressions of geometrically nonlinear problems and matrix equations of the element free galerkin method are derived 本文在非线性连续介质力学原理的基础上分别讨论了大变形情况下应变和应力的度量、几何非线性问题的表达格式、无单元迦辽金法矩阵方程的具体形式和解法以及大变形情况下的本构关系等问题。
The paper applies sdm in drawing the map of pollution areas . by synthesizing contaminated factor , saturated esdd and damp factor in pollution areas , the equal saturated esdd is presented . the isopleth map for equal saturated esdd is drawn by grid method based on kriging regression , and the isopleth map is regarded as the map of pollution areas 通过将影响污区分布的积污因素、盐密指标、湿润因素这三种因素综合为等效盐密,运用克里金法实现等效盐密的插值,最终通过网格法绘制等值线图实现了电网污区分布图计算机自动绘制。
The moment method is used to calculate the rcs of three - dimensional targets in this paper . these targets include conducting targets , dielectric targets and coat targets . triangular patches are used to model the surface of the target , then electric field integral equation ( efie ) and magnetic field integral equation ( mfie ) are built which satisfy the boundary conditions . the rwg vector base functions are used to denote equivalent electric current and magnetic current on the surface of the target . finally use the galerkin method ( rwg vector base functions are basis function and test function ) to transform integral equations into matrix equation . when obtain the equivalent electric current and magnetic current , we can calculate the scattering field and the rcs of the target 本文利用矩量法计算了三维导体目标、介质目标、涂层目标的雷达散射截面。首先采用三角形面元对物体表面几何形状进行模拟，然后建立满足边界条件的电场积分方程( efie )和磁场积分方程( mfie ) ，将物体表面的等效电磁流用rwg矢量基函数表示，最后利用伽略金法( rwg矢量基函数既作为基函数又作为检验函数)将电磁场积分方程转化为矩阵方程求解未知电磁流系数，得到了表面的等效电磁流后，可以计算散射场和目标的雷达散射截面。
