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Summary: The concept of matrix and its determinant computing, matrix determinant, matrix sub-block with the elementary transformation, invertible matrix, rank of matrix; vector and its computation, the linear relationship between vector, vector group of rank; linear equations of the nature and structure of linear equations; matrix eigenvalue and eigenvector, similar to matrix and matrix diagonalization conditions, the standard quadratic form with the normal forms, quadratic and symmetric matrix There are qualitative.

内容提要：行列式矩阵的概念及其运算，方阵的行列式，矩阵的分块与初等变换，可逆矩阵，矩阵的秩；向量及其运算，向量间的线性关系，向量组的秩；线性方程组的性质与结构，线性方程组的求解；矩阵的特征值与特征向量，相似矩阵与矩阵可对角化条件，二次型的标准形与规范形，二次型和对称阵的有定性。

Therefore, its irradiance computation can be quite time-consuming, unless it is cached, as mentioned earlier.

因此，它的照度计算可以很耗费时间，除非它被缓存，如前面提到的

The number of rays used for the computation of irradiance coming from the environment map.

光的数量用于计算辐射来自环境的贴图。

The present computation provides the support for the thermal-hydraulic design of hospital neutron irradiator.

本文的研究工作为医院中子照射器的热工水力研究提供了有意义的分析结果，对于工程设计具有参考价值。

Through the mid-1980s, Wolfram continued his work on complexity, discovering a number of fundamental connections between computation and nature, and inventing such concepts as computational irreducibility.

整个80年代中期，沃尔弗莱姆继续研究复合的复杂性，发现了许多自然现象和计算机计算之间的基本的规律，提出了诸如计算的不可还原的概念等。

This article, in the term of Eigenfunction method of Quantum mechanics, illustrated indetail the Irreducible representation (Irreducible representation marices) of Reprensentation group of computatile space group and the disposition of phase factor of Irreducible representation basis and the disposition method of plase factor of clebsch-Gordaw coefficients in the process of the computation.

利用量力学中的本征函数法详细讨论计算空间群的表象群的不可约表示及IR基时位的处理，以及讨论了C—G系数的计算中的位的处理方法。

A boundary integral method is adopted to simulate the bubble motion in the fluid field on the assumption that the fluid field is inviscid, irrotational and incompressible. A corresponding three-dimensional computation program is exploited and the calculated results agree well with the experimental data.

将气泡运动阶段周围的流场假设为无黏、无旋、不可压缩的理想流体，运用边界积分法模拟流场中气泡的运动，并开发了三维计算程序，计算值与实验值吻合较好。

It applied Kirchhoff expression to FDTD numerical computation of acoustic scattering problems,and iterated near field on the integral surface to far field that was contributed to,which could b.

针对此问题，提出一种新的外推方法，它将柯西霍夫公式应用于FDTD数值计算中，将积分面上每一步的近场都叠加到它有贡献的远场时刻上去，近远场变换可以与FDTD的场分量迭代同步进行，不需要将外推边界上每一时间步的场值都存储下来，减少了存储空间。

In this thesis inverse iteration method is presented for design and computation of this kind of structure system.

并成功应用于浦东国际机场侯机楼屋盖的分析计算。

The results show that the target contour can be accurately extracted. While the iterative and computation time is reduced.

分割结果表明，该方法能够准确地提取出目标轮廓，同时减少了迭代次数和运算时间。

We were cousins—his grandfather was King of Scots,and his great-grandfather was Henry VII of England.

我们是堂姐弟——他的祖父曾是苏格兰国王，他的曾祖父是英格兰的亨利二世。

I do want to help you, but I am in a quandary now!

我是想帮你，但是我现在左右为难啊！