内容提要

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。

In this paper, we study the matching of security investment portfolio and its investment strategy in china.

内容提要：本文提出并实证检验了我国证券投资基金投资组合的构建和调整与其投资策略匹配性的研究视角。

The fair judicature is just to be the important feature of the society of legal system.

内容提要」司法独立是司法公正的体制保障。

The hotel industry is one kind of labor-intensive and important service enterprise.

内容提要：饭店业是一项劳动密集型的重要的服务性产业。

This essay tries to re-understand the value and predicament of Lippmann's theory in Mass Communication in the sight of rationalism.

内容提要：本文试图从理性主义角度重新审视李普曼思想的价值与困局。

Commercial mark is the symbol differentiates and demonstrates the commodity, service or business.

内容提要：商业标志是指对商品、服务或营业起到区别与表彰作用的标志。

Pope's mock-heroic poem The Rape of the Lock is widely accepted because it parodies the ancient heroic epics in its depiction ofa very small thing which occurred in the upper-class society in London then, in order to achievean ironic effect andthe double purposes of entertainment and instruction.

内容提要：蒲柏的仿英雄体史诗《夺发记》以"戏仿"古典英雄诗史的体裁，来描写当时伦敦上流社会发生的一件微不足道的小事，以达到反讽的效果，从而使诗歌达到了愉悦与说教的双重目的。

In recent years, China's SOEs become more monopolistic under the protection of industry policies.

内容提要：近年来，我国的国有企业在产业政策的保护下表现出越来越垄断的趋势。

The technology of electric information is developing very fast and make much more and more electric products teem,which develop in the direction of handy and miniaturization,such as mordern times communication equipmen、handy electric product、luggable computer、electric car、moonlet,and so on.it is used at large that the power supply make use of storage battery.hower most of storage battery can but use appropriative chargers,that need long time in the electrification and can't judge the electrification parameter and spare electrification time.thus it need a have much function and handy intelligent charger device that is a far-ranging application different kinds and types.the text integrate upwards request that will introduce a device and system of intelligent charger base on singlechip.in the power supply loop,the transformer take the voltage from 220v to 12v,then the rectifier circuit take the voltage turn to 14v,it is by way of the voltage of electrification power supply.

内容提要：电子信息技术的快速发展使得各种各样的电子产品不断涌现，并朝着便携和小型轻量化的趋势发展，现代通讯设备、便携式电子产品、笔记本电脑、电动汽车、小卫星等普遍使用蓄电池作为电源，应用非常广泛。然而大多数设备中的蓄电池，只能使用专用的充电器，而且普通的充电器大多充电时间长，无法判断其充电参数和剩余的充电时间，那么就需要一种广泛应用于不同种类和型号的可知道其充电参数和剩余充电时间的多功能便携式通用智能充电设备。本文结合以上要求介绍一种基于单片机的通用智能充电器的设计。

From 1949 to 1978, it is near 30 years that China in the era of planned economy, and within this special social background, both of the Chinese music creation and communication had the same subject: to moralize the masses, to service the politics.

内容提要：1949~1978近30年的时间里，处在计划经济时代的中国音乐创作和音乐传播，由于特殊的社会历史背景，为了服务政治，教化大众成了这一时期的主题。

As of Tuesday, Google's results were still censored in China.

截至周二，谷歌的搜索结果仍受中国审查。

In order to make the positive action increase and negative one decrease, the sub-forces of the social factors must be adjusted to form a centripetal force.

在这一过程中，人的主体性发挥是社会有机体健康发展的灵魂。