阵

Thereby, sparsity of the Hessian matrix of the objective function is maintained by the approximate updated matrix sequence.

此算法的另一个重要性质是：算法产生的逼近目标函数Hessian阵的矩阵序列保持对称正定性。

Proofs that when iterating with the BP algorithm, if one of the neural units fall into saturation regions at least, and the other one at least don't, then the condition number of the Hessian matrix of the error function is very larger.

证明了BP算法在迭代过程中，如果至少有一个神经元落入饱和区而同时至少有一个没落入饱和区，则目标函数的Hessian阵的条件数变大，这是导致"网络瘫痪"现象的原因，也是BP算法收敛速度慢的主要原因。

In Chapter 5, a new method with direct partitioned column updates of cholesky factorization for solving large scale sparse unconstrained optimization problems is proposed, which depends on a consistent partition of the columns and cholesky factorization of the Hessian matrix.

第5章基于稀疏Hesse阵的列的相容分划，并在其Cholesky分解的基础上建立了求解大型稀疏无约束优化问题的直接校正Cholesky因子算法。

In the modified method, we use orthogonal decomposition so as to delete items which lead to linear dependence of gradient in active constraints. Therefore the Hessian matrix of the DQP subproblem is positive definite.

在改进算法中，我们通过正交分解删去了有效约束函数中引起梯度线性相关的项，从而保证了DQP子问题中的目标函数中的Hesse阵正定。

In an SQP method, it is important to keep the Hessian of the objective function in the QP problem to be positive definite.

在SQP算法中，保证QP子问题的目标函数的Hessian阵的正定性是非常重要的。

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。

Selection of dot matrix LCD module and design of interface;2. Naxi hieroglyph of dot matrix and vector and curve generativity;3. Pattern of Chinese traditional settlements is introduced,which has particular dot matrix features of traditional architecture.

介绍了中国传统聚落的模式，指出它具有传统建筑所独有的点阵特点，并列举了能够将充满个性的"点"通过彼此和谐联系的"阵"结合的实例，并以此来启发当代建筑的设计思路，使其在居住建筑中得到体现，值得当代建筑师们思考。

In Entrance Test of Higher Algebra of Zhangzhou Terachers Colleage for MA/MS Candidates in 2004,there is a question on inequality,which is determined by the summation of all positive eigenvalues of real symmetric matrix and its trace.

2004年漳州师范学院硕士研究生入学考试中有一道高等代数试题，是关于实对称阵的所有正特征根之和与其迹所确定的不等式。

In the homogeneous model, the function of tendons is assumed to be uniform in some approximated way in order to form an equivalent homogeneous material within concrete. The formulation of the homogeneous model is same with that of general FEM for common continuum, let alone the elastic matrix being resultant of that of tendon and concrete. The computation is simple, but the approximate assumption makes this method cannot be generalized, because it only represents the constitution and function of tendons in such a rough way, that the numerical results are inaccurate. In the combined model, the function of tendon is considered by the stiffness matrix with rod element, then add it into the stiffness matrix of concrete by a rational way.

均匀类单元是设想将钢筋均匀弥散于整个单元中，使其成为一种连续均匀材料单元，这种单元的与一般有限元的单元刚度矩阵推导过程一样，只不过其弹性矩阵由混凝土和钢筋两部迭加而成的，此类单元刚阵计算简明而又不会扩大计算规模，但均匀弥散只是为计算简单而作一种假想，不贴近单元构造实际，也不符合实际作用效果。

The original article, known officially as the Type A-2 Summer Flying Jacket, was made of seal-brown horsehide and lined with light brown spun silk.

原文章，正式名称为a型-2夏季飞行夹克，写密封褐色自负列阵浅棕绢丝。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。