查询词典 positive definite

optical fiber coupler, scattering matrix ; output phase difference; Hermite quadratic form ; positive definite matrix

利用其散射矩阵为酉矩阵的么正性不难证明，2×2耦合器输出相位差恒为90°，与输出功率比无关，而耦合区具有旋转对称结构的3×3耦合器的输出相位差完全取决于输出功率比，特殊地，当等分功率输出时，输出

In addition, this algorithm is not only insensitive to initial clustering number just like traditional methods, but also free of the optimization process for kernel parameters due to the use of conditionally positive definite kernel.

此外，该算法不再像传统基于聚类的辨识算法那样对初始的聚类个数敏感，而且由于条件正定核的使用，使得辨识算法免去了核参数优化的过程。

A conditionally positive definite kernel based fuzzy C-means clustering algorithm is used to make a partition for the data set.

传统模糊C均值聚类方法依赖于数据分布形状，并且对孤立点敏感，这势必影响到最终的模型性能。

This paper presents a stability criterion for design iterative learning controller. From the criterion,one can change the design problem into finding a positive definite discrete matrix kernel. It has been shown that what kind of variable can be controlled by the iterative learning,(2) and what kind of filter can be included into the controller.

摘要提出了一种针对自学习控制的稳定性判据，应用这一稳定性判据将自学习控制器的设计转化为寻找正定离散矩阵核，从而回答了两个问题，其一什么样的量可以通过自学习叠代加以控制，其二学习叠代中什么样的滤波环节的引入不会影响学习收敛性。

The method improves performance of KPCA by reasonably combining a local conditionally positive definite kernel and a global kernel. The experiment results indicate the new kernel function certainly improves the performance of KPCA.

利用组合核函数提高核主分量分析的性能，该方法将一个全局核函数与一个新的局部核函数条件正定核函数进行合理组合，从而提高KPCA所提取特征的质量。

Positive definite matrix occupies a very important position in matrix theory, and has great value in practice.

正定矩阵在矩阵论中占有十分重要的地位，在实际中也有广泛的应用价值。

In the matrix theory, n-order real symmetric positive definite matrix is important to the study of inequality.

n阶实对称正定矩阵在矩阵理论中，对它的不等式研究具有有十分重要的意义。

Based on the definitions of generalized positive definite matrix , a further study of it is made in the present paper, and several new results are obtained as a consequence.

本文利用广义正定矩阵的概念，对其作进一步的研究，并由此得出广义正定矩阵的几个新结果。

It wishes to find a new way for normative research into the concept of generalized positive definite matrix.

希望为广义正定矩阵概念的规范化探出一条新路。

Moreover, the updated matrix sequence is a symmetric positive definite matrix sequence.

在较弱的条件下，我们证明了算法的全局收敛性。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。