和协

Auxiliary police assistants in the system is a modern universal system, though relatively late, but has become a alleviative answerable to tightening, maintain social stability are an important force in China; the auxiliary police assistants in the development of a lot of problems and difficulties encountered, to look squarely at these issues, and scientifically difficult to solve them, in itself contribute to the auxiliary police assistants in the healthy development of the same time, will help to save fin...

辅警与协警是通用的概念，通常指辅助或协助警察从事与警务有关的人员。辅协警制度是当代世界各国普遍实行的制度，我国虽起步较晚，但辅协警人员已成为缓解警力紧张、维护社会治安稳定的重要力量。我国辅协警在发展中遇到不少问题和困难，正视这些问题和困难，并科学地去解决它们，在有利于辅协警自身健康发展的同时，也将有利于节约财政开支及社会主义和谐社会的构建。

Five ways on comparing covariance matrix are applied to the Shanghai 50 Indexes Stock Exchange, which are sample covariance matrix, scalar matrix, two-parameter covariance matrix, single index matrix, constant correlation matrix. We adopt principal components method and Markowitz portfolio method to measure stock market risk using VaR, getting the effect of measuring market risk. The result shows that sample covariance matrix and two-parameter covariance matrix could measure market risk more effectively.

本文以上证50指数数据为样本，采用样本协方差矩阵、数量矩阵、两参数模型矩阵、单指数模型矩阵、常量相关矩阵作为与股票相关的协方差矩阵，结合投资策略选择的主成分方法和Markowitz最优投资组合方法，计算VaR以度量市场风险，并比较了五种协方差矩阵度量市场风险的效果，结果表明，在主成分方法中，样本协方差矩阵和两参数矩阵方法能有效的度量市场风险。

Based on works above all, the thesis compares results of positive analysis with what is going on in real markets, proceeds to verify the results of positive analysis, the thesis brings forward some advice in order to reform and perfect the China"s agricultural commodity futures markets.The first two chapters in this article investigates the unbiasedness hypothesis of futures prices in China"s agricultural commodity futures markets.

第二章详细介绍了协整技术和误差修正机制，利用该技术分析了距离最后交易日一月、二月、三月、四月、五月和六月期的大豆和小麦期货价格与现货价格之间的协整关系，发现四月期以内的大豆和二月期以内的小麦期货价格是对现货价格的无偏预测，而五月、六月期的大豆和三月期的小麦期货价格不是现货价格的无偏预测，四月、五月、六月期的小麦期货价格与相应的现货价格不存在协整关系。

But when there are outliers in the sample, these methods are easily affected by them.

但是当样本数据中包括离群值时，计算结果就会很容易受到这些离群值的影响，这是因为传统的均值向量和协方差矩阵都不是稳健的统计量。

Because of the quality of ore, blast furnace characteristics of the relationship between medium-sized steel enterprises mainly long association mining, we simulated the second quarter, compared with the spot price of Australian mine co-lowest out of 10%-20%, but assuming that Australian iron ore price agreement long in the third quarter rise about 23%, sea freight and ore spot prices remain unchanged in the next six months, then we simulated the third quarter than the spot price of Australian mine co-7.8% higher price.

因矿石品质、高炉特点等关系，大中型钢企主要采用长协矿，我们模拟的二季度澳矿长协价较现货价低出10%-20%，但如果假设澳矿三季度长协价再涨23%，现货海运费和矿价在未来六个月均保持不变，那么我们模拟的三季度澳矿长协价较现货价高出7.8%。

To some extent,expectations and covariances can.

均值和协方差一定程度上可以描述这些随机变量的概率分布特性。

While defined in terms of variances and covariances, PCA is usually applied to standardized data since the results are sensitive to the often arbitrary choices of units of measurement used in a study.

就定义差异变量和协方差而言，PCA分析前通常要先标准化处理数据，因为，PCA对任意选择研究中的计量单元是敏感的。

Based on the Lyapunov equations, the formulas of computing local predicting error variances and covariances are given, which are applied to compute optimal weights.

其中提出了基于Lyapunov方程的局部预报估值误差方差阵和协方差阵计算公式。

Congress considered and unanimously adopted: The Chinese Association for the third work of the Council Ai and financial reporting; Ai China description of the Association to amend the statute; pay the standard membership dues; China Society AI approach the fourth election of the Council; China Ai Association article four votes in the Council election and the nomination of scrutineers; China Ai Association Council candidates recommended by the fourth process, qualification and statistical results; vote elected the fourth of China's Association for AIDS Council candidates.

会员代表大会审议并一致通过了：中国艾协第三届理事会工作和财务报告；中国艾协章程修改的说明；会员会费缴纳标准；中国艾协第四届理事会选举办法；中国艾协第四届理事会选举计票人和监票人提名；中国艾协第四届理事会理事候选人推荐过程、资格审查及统计结果；投票选举产生了中国艾协第四届理事会理事人选。

This is quite normal, but also a lot of people to buy a duplex apartment reasons to be clear distinction between "public and private" separation "forthcoming" and reach a harmony.

这是很正常，也是很多人购买复式公寓的原因，可以明显的区分&公私&，分离&动静&，达到一种和协。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。