查询词典 hessian

An estimate of the Hessian of the Lagrangian is updated at each iteration using the BFGS formula.

由于自变量的维数很高，这样的问题是被分解成多个低维子问题来求解的。

Recently, it is a hot research at home and abroad in portioning groups of the matrix to iteration which is based on the structure of the Hessian.

近年来，结合稀疏Hesse阵的结构，按照分划组的思想将矩阵列分划进行迭代是国内外研究的一个热点。

Modifications to the conventional layer by layer optimization method make it possible to avoid computing Hessian Matrix and its inverse form, thus it can decrease computational complexity dramatically. Simulation results for some practical problems such as function approximation and XOR problem, have demonstrated improvements over classical back-propagation algorithm and conventional layer by layer optimization algorithm.

本文在传统逐层优化算法上的改进避免了反复计算 Hessian 矩阵及其逆矩阵，因而可以减少计算量，对一些应用问题，如函数逼近、异或等问题的仿真实验证实了新的算法比经典的 BP 算法以及现存的逐层优化算法的训练速度更快、可靠性更好。

In Chapter 4, a symmetric triangular partitioned secant method for solving large scale sparse unconstrained optimization problems is constructed, which is a combination of a secant method and a finite difference method, and depends on a consistent partition of the columns of the lower triangular part of the Hessian matrix; it reduces the number of gradient evaluations required by Powell and Toints algorithm (the indirect lower triangular substitution algorithm) by one at every iterative step.

此算法是基于稀疏Hesse阵的下三角部分的列的相容分划的基础上建立起来的，把割线法和有限差分法有机的结合在了一起，在每次迭代中，把由Powell和Toint的算法所需要的梯度赋值次数减少了一。

That calm profile under the little three-cornered hat of the school of Brienne, that green uniform, the white revers concealing the star of the Legion of Honor, his great coat hiding his epaulets, the corner of red ribbon peeping from beneath his vest, his leather trousers, the white horse with the saddle-cloth of purple velvet bearing on the corners crowned N's eagles, Hessian boots over silk stockings, silver spurs, the sword of Marengo,--that whole figure of the last of the Caesars is present to all imaginations, saluted with acclamations by some, severely regarded by others.

布里埃纳①军校的小帽下那种镇静的侧面像，那身绿色的军服，遮着勋章的白翻领，遮着肩章的灰色外衣，坎肩下的一角红丝带，皮短裤，骑匹白马，马背上覆着紫绒，紫绒角上有几个上冠皇冕的N和鹰，丝袜，长统马靴，银刺马距，马伦哥剑，在每个人的想象中都有着这副最后一个恺撒的尊容，有些人见了欢欣鼓舞，有些人见了侧目而视。

That calm profile under the little three-cornered hat of the school of Brienne, that green uniform, the white revers concealing the star of the Legion of Honor, his great coat hiding his epaulets, the corner of red ribbon peeping from beneath his vest, his leather trousers, the white horse with the saddle-cloth of purple velvet bearing on the corners crowned N's and eagles, Hessian boots over silk stockings, silver spurs, the sword of Marengo,--that whole figure of the last of the Caesars is present to all imaginations, saluted with acclamations by some, severely regarded by others.

布里埃纳①军校的小帽下那种镇静的侧面像，那身绿色的军服，遮着勋章的白翻领，遮着肩章的灰色外衣，坎肩下的一角红丝带，皮短裤，骑匹白马，马背上覆着紫绒，紫绒角上有几个上冠皇冕的N和鹰，丝袜，长统马靴，银刺马距，马伦哥剑，在每个人的想象中都有着这副最后一个恺撒的尊容，有些人见了欢欣鼓舞，有些人见了侧目而视。

The company has always followed a "high-quality innovation and excellence," the purpose of the operation, the major producers of leather products for sale are: 05 non-woven bags, shopping bags, Oxford bags, 006 canvas bag, cotton bags, hessian bags, handbags, bagging the West, home Private, family 01 items, packaging, health care, greening projects in areas such as non-woven products and processing business.

公司一贯遵循着"优质创新、精益求精"的经营宗旨，主要生产销售的皮具系列产品有：无纺布袋05、购物袋、牛津袋、帆布袋006，棉布袋、麻布袋，手袋、西装袋、家私、家庭01用品、包装、医疗、绿化工程等领域无纺布制品及来料加工业务。

It exploits the structured of the Hessian matrix of the objective function sufficiently. An attractive property of the structured BFGS method is its local superlinear/quadratic convergence property for the nonzero/zero residual problems.

它们充分利用了目标函数的Hesse矩阵的结构以提高算法的效率，该算法的显著优点是对于零残量问题具有二阶收敛性而对于非零残量问题具有超线性收敛性。

Above all by hand in dc network to the coupling between concerns and be changed stream implement changeover equation, derivation gives rectangular coordinates to fasten matrix of the Jacobi that makes dc system, Hessian, the means that offers section to seek solution in the light of the change that makes dc system control fashion next begs solution voltage to stabilize the usable transmission ability below tie condition.

首先由交直流网络间的耦合关系和换流器转换方程，推导出直角坐标系交直流系统的Jacobi、Hessian矩阵，然后针对交直流系统控制方式的改变提出分段求解的方法求解电压稳定约束条件下的可用传输能力。

The methods include: determining all elements' sensitivities to the sum of error functions, optimization sequence and direction of objective functions, eigenvalues and eigenvectors of Hessian matrix and the approach of stabilizing algorithm.

提出了计算功率GaAs MESFET小信号模型参数的一些改进方法，包括计算Hesse矩阵本征值和本征向量，确定各元件对总误差的敏感度、目标函数的优化顺序和优化方向，以及稳定的计算方法，计算结果与器件的测量值吻合。

The production moved off-Broadway to New York City, where she won the Joseph E. Calloway award for her performance, and was profiled in American Theater Magazine as one of ten young theater artists to watch.

生产提出过百老汇的新的纽约市，在那里她赢得了约瑟夫calloway奖，她的表现，并于异型在美国的战区杂志之一， 10战区的青年艺术家观赏。

It's a risk tradeoff, and I believe that adding test support code usually wins.

这是一个风险的权衡，我相信添加测试代码通常会占上风。