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This paper proposes a matrix based substitution permutation network as the model of block cipher.

论文提出了一种基于矩阵的代替置换网络模型。

Second-generation phototypesetter: A computer aided phototypesetting system using flash tube as the light source and a rotating film matrix for exposing the film or paper.

第二代照排机：电脑辅助的照相排字系统。它用闪光管作光源，把旋转中的菲林字母板上的字体影排队于菲林或相纸上。

This paper analyses how the electricity vector orientation of the normal incidence plane polarized light or garden polarization light is altered by quarter wave plate by making use of Jones matrix of polarizer.

用坐标变换法解出偏振器件一般情况下的Jones矩阵，利用偏振器件的Jones矩阵分析四分之一波片对正入射平面偏振光和园偏振光的偏振态的改变，指出获得和判断椭园和园偏振光的方法。

Some new method is presented in this paper: A. An Integrated parameters computation method to analysis asynchronous operation of the turbine generator is given, including the equivalence of short circuit and open circuit of field windings, deducing boundary condition of 〓 method and computing frequency parameters. B. A new memory structure for sparse complex matrix and a PCCG method based on it are introduced to save memory and computation time. C. An equivalent method of vacuum is presented, and effectively eliminate the effect of corner point and accelerate convergence of PCCG method. D. Coupling the computation of electromagnetic and temperature field is discussed and model for computing temperature field of the turbine generator rotor at asynchronous operation is built.

文中提出了以下新方法：(1)在失磁异步运行转子三维涡流场计算中提出了完整的参数计算方法，其中包括励磁绕组开、短路的等效，〓法边界条件的推导及频率参数的计算方法；(2)提出了铁心内空气域的等效方法，有效地解决了开槽引起的角点奇异问题，并提高了方程组的迭代收敛速度；(3)在〓法有限元模型中，创立了一种能节约内存、提高计算速度的压缩存储矩阵格式，并建立了基于该格式的方程组解法；(4)提出了涡流电磁场和温度场两种不同场计算的合理结合方法，建立了转子三维稳态和时变温度场的有限元计算模型。

In this paper a few popular computation methods of matrix exponential are reviewed systematically and evaluated in detaA and some problems which need our thorough research are put forward.

本文系统地阐述了目前流行的几种主要逼近算法，对这些算法进行了详细的评估，并提出了一些有待深入研究的问题。

In the present paper,the mechanism of durability of ceramic fibre in portland cement matrix is also discussed.

本工作还探讨了陶瓷纤维的耐久性机理。

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。

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。

In this paper, what happens to the inequality when the positive definite matrix is allowed to be positive semi-definite was considered.

本文进一步推广王松桂等的结论，对于半正定Hermite阵，给出了推广的Wielandt不等式的矩阵形式。

The major tasks in this paper include:(1) Improvement in the lower bound of max eigenvalue of the positive matrix.

本文重点研究遗传算法以及混合遗传算法在传统数学中的应用，主要有以下几个方面的工作。

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％。