正子

By means of the constrained perturbation approach proposed by Champagne, this algorithm can update the signal subspace while preserve the orthonormality of the updated singular vectors.

该方法利用了Champagne等人提出了受限摄动方法，在更新信号子空间的同时，保持构成子空间的各组基的正交规范性。

The properties and some new results of complex value filter banks are obtained, such as parametrization methods, etc.

本文首次系统研究了正交复子波基及对应滤波器组理论，分析了它们的独特性质、参数化和最优选择。

In chapter four, we developed a direct approach for soliton perturbation based on the Green function, This approch get rid of the proof of orthognality for eigenfunctions in a direct approch for soliton perturbation developed by Yan Jiaren etal.

第四章，发展了一种基于格林函数的孤子微扰理论，克服了颜家壬教授微扰直接法中本征函数正交性证明的困难。

In the first part of this paper, we give some basic concepts of regular Sturm-Liouville problems and some Sturm-Liouville problems with eigenparameter in the boundary conditions and the definition and properties of the Krein space. Using the Krein space, we describe a class of Sturm-Liouville problems with eigenparameter in two boundary conditions and prove that it can generate a self-adjoint operator in Krein space with only point spectrum.

第一部分我们介绍了一些基本概念如正则Sturm-Liouville问题、边界条件含参数的问题、Krein空间等，并利用Krein空间的定义和性质描述了一类参数边界条件的Sturm-Liouville问题，证明它可构造一Krein空间上的自伴算子，并且谱全为点谱。

Polyembryonyoccurs in 〓 and 〓 caryopsis of cross SB-1 X Balilla(Balilla is non-polyembryony),and in 〓 caryopsis ofits reciprocal the polyembryony is observed but not in 〓caropsis.

在正交（SB-1 X 马来红，马来红不具多胚特性）〓及〓颖果中都出现了多胚苗，反交（马来红 X SB-1）的〓颖果未出现多胚苗，但其〓颖果观察到多胚苗，表明SB-1的多胚不是合子裂生产生的，而是胚囊的一种特殊性状。

If a symmetrical matrix is positive definite, the determinants of all its minors are also positive.

如果对称矩阵是为正定者，它的所有子式的行列式也都是正的。

For the Ricci flow on n-dimensional (n ≥ 4) manifolds, if the initial metric possess positive curvature operator and strong pinching conditions, then we can get the similiar results, consult the reference papers , and .

对于维数n≥4的黎曼流形，如果初始的度量的正曲率算子加上足够强的拼挤条件，也能够得到类似的结果，参见[Hu1]，和。

It is proved that the positivity domain of schemes belongs to stability domain of schemes.

指出格式的正性域是其稳定域的子域。

In calculation,we obtain the renormalizedquark propagator and the BS wavefunctions which are in good agreement with othertheoretical results.

在计算过程中，我们得到了重正化的夸克传播子、BS波函数，和他人的理论结果符合得很好。

A proportional fairness resource allocation algorithm, including both subcarrier assignment and power allocation, is proposed in multicast orthogonal frequency division multiplexing systems.

提出了一种多播正交频分复用系统中的比例公平资源分配算法，该算法包括：子载波分配算法和功率分配算法。

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。