查询词典 Hessian

Bond and angle types are assigned based on (1) atom types,(2) bond lengths or bond angles in the QM optimised geometry and (3) matching force constants derived from the Hessian matrix.

键和键角类型标记，依据（1）原子类型（2）量子优化几何学中的键长或者键角（3）源于 Hessian 矩阵的合适的力常数。

Then we obtain the existence and nonexistence of the solutions for complex Monge-Ampere equation and Hessian equations with infinite boundary value in the certain bounded domain in Cn.

第三章我们先介绍郑绍远与丘成桐在研究非紧复流行上的复Kahler度量的存在性时的主要工作，然后通过构造径向闸函数的方法来讨论凸域上的复Monge-Ampere方程以及复Hessian方程边界爆破问题解的存在性。

Hessian and/or Burlap might provide significant value when operating in a heterogeneous environment, because they explicitly allow for non-Java clients.

Hessian 和或 Burlap可以支持重要的值，当在一个异质的环境操作，因为他们明确的允许为非java 对象。

Experimental results show the recognition rate of the method is 95%for a known expresser and 72% for a novel expresser. Aiming at the shortcomings of optical flow technique,two improved optical flow algorithms are presented.One way is to introduce forward and backword constraint eqution and Hessian matrix of optical flow equation is computed.The well- posedness of each point of local neighbourhood is examined and the weight of Lucas-Kanade's method is defined as the reciprocal of the conditioning number of its Hessian Matrix.

3针对传统光流法的缺点，分别提出了两种不同的改进方法：其一为引入前向-后向光流方程，计算其Hessian矩阵，把Hessian矩阵条件数的倒数作为Lucas-Kanade光流法的加权阵，可有效消除局部邻域中不可靠约束点，同时提高基本约束方程解的稳定性；其二为针对传统光流法只适用于刚体运动的特点，在扩展约束光流方程的基础上引入了div-curl样条函数作为扩展光流约束方程的附加约束条件，给出了一阶和二阶div-curl样条约束下光流的数值解。

When the Hessian is positive definite, the QP subproblem is a strictly convex quadratic programming.

若QP子问题的Hessian阵正定，则它是一个严格凸二次规划问题。

In order to avoid the Maratos effect,the merit function s used are approximations to Flether s differentiable exact penalty function,and the algorithm updates approximations to one-sided reduced Hessian and two-sided reduced Hessian seperately.

为避免Maratos效应，我们采用Flether的光滑精确罚函数的逼近形式作为价值函数，并且分别对Lagarange函数的单边既约Hessian的近似阵和双边既约Hessian的近似阵进行校正。

The computation methods of the elements of Hessian matrix and the eigenvalues of Hessian matrix are discussed.

讨论了Hessian矩阵元的计算方法和Hessian矩阵特徵值的计算方法。

In the method, the symmetric positive semidefinite matrices are updated to approximate the Hessian matrices of the elemental objective functions and their sum to approximate the Hessian matrix of the objective function.

算法用对称半正定矩阵作为元素目标函数的Hessian阵的近似，使得其和仍然保持目标函数的Hessian阵的某种稀疏性。

It is well-known that reduced Hessian method is one of the most efficient methods for solving large scale constrained optimization problems. However, the convergence analysis for the method requires of the positive definiteness of the reduced Hessian of Lagrangian function.

众所周知，既约Hessian方法是求解较大规模约束优化问题的一类有效方法，但已有的这类方法的全局收敛性分析需假定拉格朗日函数的既约Hessian矩阵的一致正定性。

The computation methods of the elements of Hessian matrix and the eigenvalues of Hessian matrix are discussed.

讨论了Hessian矩阵元的计算方法和Hessian矩阵特征值的计算方法。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。