浅析层次分析法在工程项目质量预控中的应用

本文利用层次分析法，可以以量化指标预先确定影响工程项目质量各因素的大小，便于对工程质量进行预控。     

多元智能理论与体育课程开发的研究

对多元智能理论在体育课程开发中的运用进行了研究,构建了一套适合于不同学生潜能发展的多元、多层级、开放、发展性的学校课程体系.近几年通过根据多元智能理论开发设计的课程实践,取得了良好的效果,促进学生的健康发展.     

外贴FRP结构剥离分析概述

粘结层性能是影响外贴FRP结构加固效果的重要因素。本文介绍了外贴FRP结构粘结剪应力分析的主要理论和所取得成果。重点对粘结剪应力分析发展现状进行了综述,并对外贴FRP加固结构及剪应力研究发展趋势进行了展望。     

DoS攻击背景下SVM双端重复漂移数据隔离技术

提出一种基于包络延拓本征匹配的DoS攻击背景下SVM双端重复漂移数据隔离技术,进行DoS攻击模型流程设计,构建SVM双端重复漂移数据信号模型构建和预处理,采用最小均方误差准则设计一个能去除多个已知干扰频率成份的本征波匹配滤波器,实现SVM双端重复漂移数据的信号隔离,从训练属性集中利用信息增益Gain选出属性集中的最优分裂属性,避免了系统通过反复发送畸形的攻击数据引发系统错误分配大量系统资源。仿真实验结果表明,算法对DoS攻击背景下的双端重复数据隔离性能优越,准确隔离率提高23%,避免了大量无用数据的产生而造成被攻击主机的网络拥塞。     

撞楔-锚索梁联合支护在深部穿层巷道中的应用

针对千米深井穿层巷道托顶煤施工中存在的顶板易冒落且危及施工安全的问题,提出了以撞楔法+锚索梁联合支护技术。结合巨野矿区某千米深井巷道现场具体地质及施工条件,阐述了其施工工艺,比选确定了合理的支护参数,进行了现场应用,并对其作用机理进行了分析。研究表明,撞楔+锚索梁联合施工技术是巷道掘进托顶煤施工中一种受力合理、安全经济且施工简便的支护结构形式,具有广泛的推广价值。     

浅谈中间件及其在电信服务中的应用

当前大型数据库应用系统的开发中较多采用中间件构成三层应用体系结构。在叙述中间件的基本概念和分布式多层体系结构的优点的基础上，介绍中间件在电信服务中使用的背景和使用的情况。     

离散描述系统干扰解耦状态观测器设计及鲁棒故障诊断

对一类带有未知输入干扰的离散描述系统,提出了一种新型的干扰解耦状态观测器;对一类带有未知输入干扰和有界不确定性的离散描述系统,以状态观测器为基础,利用故障信号与观测误差之间的关系,构造了一种带有未知输入干扰的离散描述系统的鲁棒故障诊断方法.该方法不但能够检测系统中是否出现故障,而且还可以估计出故障的幅值大小.文中还讨论了阈值的选取、该算法能检测到的最小故障信号和故障信号的估计误差,其仿真结果表明了该方法的有效性.     

An overview of cricket ball swing

The aerodynamic properties of a cricket ball have intrigued cricket players and spectators for years, arguably since the advent of the game itself. The main interest is in the fact that the ball can follow a curved flight path that may not always be under the control of the bowler. The basic aerodynamic principles responsible for the nonlinear flight or ‘swing’ of a cricket ball were identified decades ago and many papers have been published on the subject. Over the last 25 years or so, several empirical investigations have also been conducted on cricket ball swing, which revealed the amount of attainable swing and identified the parameters that affect it. Those findings are reviewed here with emphasis on phenomena such as late swing and the effects of humidity on swing. The relatively new concept of ‘reverse swing’, how it can be achieved in practice, and the role in it of ‘ball tampering’, are also discussed in detail. In particular, the ability of some bowlers to effectively swing an old ball in the conventional, reverse and the newly termed ‘contrast’ swing mode is addressed. A discussion of the ‘white” cricket ball used in the 1999 and 2003 World Cup tournaments, which supposedly possesses different swing properties compared to a conventional red ball, is also included. This is a current overview of cricket ball swing rather than a detailed review of all research work performed on the topic. The emphasis is on presenting scientific explanations for the various aerodynamic phenomena that affect cricket ball swing on a cricket ground.     

Industrial Dehumanization——Viewed from the husband and wife relationship in "Odour of Chrysanthemums"

Lawrence is regarded as one of most accomplished short story writers in twentieth century, with ＂Odour of Chrysanthemums＂ one of his early works. Through the death of a miner, the text shows how humanity was ruined by industrial civilization. This essay is intended to unveil the destructive force by analyzing the relationship between the husband and wife.     

兰州市城区稳定边界层变化规律的初步研究

兰州市城区空气污染严重与其特殊的大气边界层密切相关。利用兰州市城区现有大气边界层探测资料 ,采用多种稳定度参数计算方法 ,统计分析了该市大气层结稳定度的时空分布规律及其与天气形势的关系 ,发现兰州市城区冬季大气稳定边界层日间存在发生或发展的特有现象 ,并探寻了其形成机制 ,从而为兰州市开展空气污染预报提供可靠的理论依据