正定算子

It is proved that the problem has a global solution whose limit at infinity solves the original equation.

本文讨论解算子与右端数据均有扰动的半正定算子方程的动态系统方法。

The algorithm consists of a least-squares part providing an analytica l initial solution,and a projection part that projects the initial least-square s solution successively onto each equality constraint.

该算法有两个显著特点：一是目标函数的Hessian矩阵不要求正定；二是由于采用平方根因子分解来计算增广Hessian矩阵及投影算子矩阵，算法具有很好的数字稳定性。

The theoretical model of QBER was established with POVM (Positive Operator Valued Measurement).

采用半正定算子测量建立了光纤信道压力作用下的误码率分析模型。

A sensor with balanced detection is introduced to the BB84 protocol and the theoretical model of the QBER is established with POVM (Positive Operator Valued Measurement).

论文将双平衡探测结构引入BB84模型中，利用半正定算子值测量建立了接收端在偏振模影响下的误码率模型。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。