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A fast algorithm for calculating the inverse and Moore-Penrose inverse of the permutation factor circulant matrix is presented. Then, a fast algorithm for the product of the permutation factor circulant matrix is given. Finally, The least-square solutions of inverse problems and the optimal approximation problems for the permutation factor circulant matrix are discussed.

首先给出了一种求n阶置换因子循环矩阵的逆阵、自反g-逆、群逆、Moore-Penrose逆的快速算法，然后给出了计算两n阶置换因子循环矩阵之乘积阵的一种快速算法，最后给出了其反问题的最小二乘解的存在性定理及它的一般表示，并证明了逼近矩阵的存在唯一性且给出它的具体表达式。

From the sequence correlation requiring of Turbo codes coding and decoding, correlation of sequence is proposed as a criterion to design interleaver, a good interleave scheme called clinodiagonal interleaver is obtained.

从Turbo码距离特性解释了Turbo码的性能，由于分量码采用递归系统卷积码，具有码距拖尾性，使得交织器长度为N的Turbo码能使误码率降低到卷积码的1/N。

We have also shown that the collection of prime event structures on N can be endowed with the structure of a complete metric space, and in this space the collection of all universal homogeneous prime event structures is topologically large: it is the complement of a meager set.

我们也表明，集的主要事件结构对N可以赋予一个完整的度量空间结构，在该空间的主要活动是普遍均匀结构拓扑大：它是相辅相成的微薄的集合。

The concept of stationary P, N, and p charge regions with a simple dipole geometry is an oversimplification of the actual electrical structure of a thunderstorm.

表现为简单偶极子分布的固定P，N和p电荷区概念只是雷暴云中真实电场结构中极为简化的描述。

H-2: The measurable set-valued mapping F : X - CC is -bounded (n+1)-lower semicontinuos where X is a closed, bounded and convex subset of a n-dimension Bana...

的。 H-3：X是1-维赋范线性空间中的有界闭凸子集，可测集值映射F：X→C_c是2-下半连续的(2-l.s.c。)。

Employees are numbered by integer numbers in a range from 1 to N, The personnel office has ranked each employee with a conviviality rating.

每个职员都有一个唯一的整数编号（范围在1到N之间），并且对应一个参加聚会所获得的欢乐度。

Employeesare numbered by integer numbers in a range from 1 to N, The personnel office hasranked each employee with a conviviality rating.

每个职员都有一个唯一的整数编号（范围在1到N之间），并且对应一个参加聚会所获得的欢乐度。

Melamine Cyanurate is a white crystal power with is a excellent non-halogen N flame product is mainly used as non-halogen flame retardant for synthetic resin,synthetic rubber and plastic products;solid lubricant in lubricating oil and grease;fire retardant in fire-proofing coating;lubricant in lubricating oil and grease;fire retardant in fire-proofing coating;lubricant in the cosmetic.

三聚氰胺氰尿酸盐是一种白色结晶权力xxxxx是一个优秀的非卤素n火焰xxxxx产品，主要是用来作为非卤素阻燃剂的合成树脂（坝，聚氯乙烯，聚苯乙烯，聚甲醛），合成橡胶和塑料制品；固体润滑剂润滑油和润滑脂；阻燃剂在防火涂料；润滑剂在润滑油和润滑脂；阻燃剂在防火涂料；润滑剂在化妆品。

Characteristics of free vibration and forced vibration of a damped system with dry frictional damping,viscous damping and c x·2 damping are analyzed and calculated,acceleration response of free-vibration of the dry frictional damped system has a sudden change when x· is zero,the change value is constant and depends only on the natural frequency ωn and the displacement xk due to dry friction.

本文对存在干摩擦阻尼、粘性阻尼和c.x2阻尼系统的自由振动及受迫振动特性进行了解析及数值计算，得到干摩擦阻尼系统自由振动的加速度响应在速度零点有一突变，这一变化量为定值，且只与系统固有频率ωn及摩擦当量位移xk有关。

Where N is a decimal digit representing a sub-match.

其中 N 是一个十进制数字，表示某个子匹配。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。