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A new topological index has been developed based on the distance matrix in this paper. It was used in study on boiling point of chain hydrocarbons.

从距离矩阵出发，结合矩阵的数学运算，定义了1种新的拓扑指数S，并将它用于研究链烃类化合物的沸点，获得了比较理想的结果。

In this paper, row distance and minimum row distance of matrix on F2 are presented, and some properties about row distance are given. Two important theorems are proved.

陈勤引进了F2上矩阵的行间距和极小行间距概念，给出了极小行间距的一些基本性质，证明了极小行间距的两个重要定理。

In this paper, 3-D tertiary structure of protein fold was mapped into 2-D distance matrix which can be further regarded as gray level image.

最后应用于27类折叠子分类，对独立集测试的精度达到了71.95 %，对所有数据进行10 交叉验证的精度为78.94 %。

Based on research of so-called space-time DOA matrix method,we propose several of its improved and generalized forms in this paper.

本文在对时空DOA矩阵方法进行详细分析的基础上，提出了该方法的几种改进与推广形式。

This paper presents a matrix game method for calculating the process of dogfight between two fighters with numerical simulation .

本文介绍数值模拟计算两机空战格斗过程的一种矩阵博弈解法。

This paper introduces a new type of microcontroller STC89C516RD + to the controller of the monochrome LED dot matrix display system design.

本文介绍了一款以新型单片机STC89C516RD+为控制器的单色LED点阵显示系统的设计。

This paper describes the hardware design of the LED dot matrix display, and the principle function of the various parts of the circuit, the corresponding software program design and the use of some such.

文中详细介绍了LED点阵显示的硬件设计思路、硬件电路各个部分的功能及原理、相应软件的程序设计，以及使用说明等。

1IMPACT PRINTERS A common impact printer for microcomputers is, dot-matrix printer, the which works by striking pins in a print element against the ribbon and paper.

1接触式打印机。微型计算机上常用的接触式打印机是点阵式打印机，其通过驱动装在打印头上的打印针对着色带和纸击打。

This paper introduced an eigen-mode decomposing method to decouple zero sequence parameter in double circuit. The decomposing matrix of eigen-mode component is given. The zero sequence component relationship between voltages or currents at two terminals of double circuit was achieved by composing eigen-mode components.

提出一种采用特征模量分解方法对同杆多回线间的零序参数解耦，并给出了同杆双回线零序参数特征模量分解矩阵，通过特征模量分解得到同杆双回线路两端之间的零序电量关系。

In this paper,an Ethernet based double-precision floating-point matrix multiplication parallel computing system was designed.The design was implemented on Xilinx's XUP Virtex-II Pro development system.

本文设计了一个基于以太网的双精度浮点矩阵乘法并行计算系统，并在Xilinx XUP Virtex-II Pro开发平台上进行了原型验证。

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％。