查询词典 non symmetric

The reason of using Archimedean Copula is to solve the non-symmetric character of return and cluster character in tail ,but its disadvantage is hard to produce multivariate random numbers ,and ease to appear great change situation of simulated scenarios, and affect the optimal decisions.

采用Archimedean Copula虽然能够解决尾部聚集特征和收益的非对成性，但缺点是易产生出现多元随机数产生较困难，同时易出现模拟的情景出现巨大变化的情况，影响最优决策。

After analyze some kinds of extensions to the classical rough set theory, a new extension of rough set model based on limited non-symmetric similarity relation is developed.

为此，在分析研究已有的扩充粗糙集理论模型的基础上，进一步提出基于限制非对称相似关系的扩充粗糙集模型。

An iterative algorithm for quadratic eigenvalue problem of non-symmetric matrix is put forward. The results show the convergence and effectiveness of the algorithm.

提出了一个二次非对称矩阵特征值问题的迭代算法，算例表明了算法的收敛性和有效性。

The dissertation presents a mathematical modeling approach for the high-speed flexible linkage mechanisms equipped with bonded piezoelectric sensing/actuating elements employing a mixed variational approach with Hamilton's principle in conjunction with the finite element formulation. This model includes both the terms coupling the elastic and rigid-body motions of linkage mechanisms and the terms coupling the elastodynamics and piezoelectricity of the elements, incorporating their effects upon the mass and stiffness matrices which are in general non-symmetric.

本文以国家自然科学基金资助项目《弹性连杆机构有害振动的主、被动控制及混合控制研究》（资助号：59605001）和广东省自然科学基金项目《开链及闭链机构有害振动控制研究》（资助号：970381）为依托，对高速弹性连杆机构振动的主动控制中的建模、求解、控制律的选择、作动/传感元件的优化以及实验研究等几个关键问题进行了比较深入细致的研究，取得了一些具有重要理论意义和重大实际应用价值的成果。

We first reformulate the degraded image model as a non-symmetric half plane 2D-ARMA model.

我们先将退化图像模型重建为一个在非对称半平面上2D-ARMA模型。

The hexapod stiffness, which is moveable platform stiffness relative to fixed base frame, generally, is a non-symmetric matrix. It can map the infinitesimal increments in the displacement and in the applied forces , representing the characteristics of forces/displacements in incremental form and relating to machine head displacements when subjects to externally applied force system. It is no doubt that the displacements will affect machine accuracy, especially with the tool under changeable load system.

六杆机构加工中心的刚度意味着输出端移动平台相对于固定基础平台的刚度，一般地，它是一个非对称的刚度矩阵，它将位移微小增量转换成微小力增量，表现了增量形式的力/位特征，关系到机床加工头受有外载荷系统时的位移，直接影响到加工精度，特别是变载荷系统下的加工精度。

The classic iterative ones need special characters of the coefficient matrix; CG has over linear convergence, but the coefficient matrix is positive definite; Krylov subspace ones can deal with non-symmetric linear systems, but sometimes it must face"collapse"problems.

经典迭代法的收敛需要由系数矩阵的一些特定性质来保证；共轭梯度法具有超线性收敛性，但是系数矩阵必须是正定矩阵；Krvlov子空间法可用于非对称矩阵问题，但可能出现崩溃现象。

Sinceβkernel is non-symmetric, there will be problem in the precision of graduation if using kernel graduation method, because, generally, kernel function is supposed to be symmetric in kernel graduation method, thus will cause boundary deviation in actual application.

但β核为非对称核，如果使用核修匀方法，在修匀精度上仍会存在问题，因为一般核修匀方法中均假设核函数具有对称性，在实际应用中将导致出现边界偏差现象。

Symmetric kernel graduation ; non-symmetric kernel graduation ; Gamma kernel ; boundary bias

对称核修匀；非对称核修匀； Gamma核；边界偏差

According to GBEM,a fullysymmetric Galerkin multi-zone boundary element methodisproposed in this paper.Based on regarding the coefficient matrix as thesum of a symmetric part and a non-symmetric one,this problem is solvedby adopting a proper assembly.Following this treatment,GBEM will beextended for a wide scope.

针对这一问题，(1)本文在单域伽辽金边界元的基础上，采用先生成各子域的方程，将系数矩阵表达为对称部分与非对称部分之和，通过恰当的集成方式，消除非对称部分的方法，提出了一种完全对称的伽辽金边界元子域法，拓宽了伽辽金边界元法的使用范围。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失