宁夏水资源可持续利用评价研究

本文在吸收前人研究成果的基础上,首先对水资源可持续利用评价指标体系进行了分析,确立了适合宁夏区情的初始指标,其次利用聚类法从初始指标里筛选得到15个评价指标,采用SVM对宁夏2002—2011年的水资源可持续利用状况进行了评价,并与传统的BP-ANN的评价结果加以比较,结果表明:两者评价结论基本一致;与ANN相比,SVM模型简单,泛化性强,分类精度高。该结果对宁夏水资源的调控和分配具有一定的意义。     

网页体裁自动识别研究

随着网络的飞速发展,网页数量急剧膨胀,近几年来更是以指数级进行增长,搜索引擎面临的挑战越来越严峻,很难从海量的网页中准确快捷地找到符合用户需求的网页。网页分类是解决这个问题的有效手段之一,基于网页主题分类和基于网页体裁分类是网页分类的两大主流,二者有效地提高了搜索引擎的检索效率。网页体裁分类是指按照网页的表现形式及其用途对网页进行分类。介绍了网页体裁的定义,网页体裁分类研究常用的分类特征,并且介绍了几种常用特征筛选方法、分类模型以及分类器的评估方法,为研究者提供了对网页体裁分类的概要性了解。     

The role of the athletes’ entourage on attitudes to doping

ABSTRACT

The present study investigated athletes’ and coaches’ beliefs about the role of athletes’ entourage in deterring or promoting doping. Competitive athletes and coaches in Greece and Australia took part in semi-structured interviews. Our analysis of the interviews produced five main themes: coach influence, peer influence, doping stance, doping stigma, and entourage’s culture. Overall, coaches and peers having a close and trusty relationship with the athletes were considered most influential with respect to doping-related decisions. The majority of the athletes held a strong anti-doping stance but could not articulate why they held this position. This inability could be ascribed to the stigmatization of doping which led to lack of knowledge and anti-doping education. Finally, an anti-doping culture in the athletes’ environment was considered central to an anti-doping stance. The study findings provide valuable information towards a comprehensive understanding of the role athletes’ entourage can play in shaping athletes’ attitudes and decision for doping.     

关联规则挖掘算法在货运管理中的应用

信息时代来临,企业普遍使用信息系统。想在激烈竞争中保持行业领先,就必须对业务数据进行深层次的分析和挖掘,提炼出其中有用的决策信息。文章设计CMM(Cargo Manage Miner)挖掘模型主要是针对物流领域中货运企业的业务进行数据挖掘的。     

图书馆按需打印的实践与未来

按需打印是出版行业的一次革命性变革,它使出版的形态发生变化,将对图书馆的未来发展产生重要影响。对于读者服务来说,自动印书机(EBM)的打印目录数据库增加了读者获取文献的渠道,其运用使读者能够根据需要自我汇编图书并打印。对于图书馆文献收藏策略来说,EBM+PDA模式将图书馆员从以往的揣测式采访的困境中解脱出来,使购买的文献就是真正流通的文献。但EBM存在价格昂贵、作者和出版商认可程度不高、没有配套适用的著作权法及相关法律等问题。     

我国书目数据标准化面临的主要障碍

书目数据标准化是实现文献资源共建共享和联机联合编目的基础与前提。我国书目数据标准化面临的主要障碍包括:英文文献编目中MARC格式的选用不统一,编目系统个别字段功能的设计不规范,对简化编目的认识不统一,《中国机读目录格式使用手册(修订版)》存在不当之处,对多卷书的处理不统一,联合编目机构之间缺乏协调,等等。     

Application of biomonitoring and support vector machine in water quality assessment

The behavior of schools of zebrafish (Danio rerio) was studied in acute toxicity environments. Behavioral features were extracted and a method for water quality assessment using support vector machine (SVM) was developed. The behavioral parameters of fish were recorded and analyzed during one hour in an environment of a 24-h half-lethal concentration (LC₅₀) of a pollutant. The data were used to develop a method to evaluate water quality, so as to give an early indication of toxicity. Four kinds of metal ions (Cu²⁺, Hg²⁺, Cr⁶⁺, and Cd²⁺) were used for toxicity testing. To enhance the efficiency and accuracy of assessment, a method combining SVM and a genetic algorithm (GA) was used. The results showed that the average prediction accuracy of the method was over 80% and the time cost was acceptable. The method gave satisfactory results for a variety of metal pollutants, demonstrating that this is an effective approach to the classification of water quality.     

VxD技术深入剖析和VxD程序的开发

该文介绍了Win9x体系结构和VxD技术在Win9x系统中的重要作用，并对VxD的文件格式、VxD设备描述块和VxD段组结构进行了深入地剖析。介绍了用VtoolsD工具包开发VxD驱动程序的流程。     

单片机音响实习课题的研究

对5103S单片机实验仪提供的机器码程序进行反汇编，并经深入分析、研究、实验、修正的成功用于单片机教学。本文提供的原理图及音乐程序设计方法，有一定实用价值。     

Machine vision inspection of rice seed based on Hough transform

INTRODUCTION It is a common phenomenon that glumes ofrice seeds are incompletely closed, especially forhybrid rice. The average proportion of hybrid riceseed with incompletely closed glumes is about 26%in nature. The threshing and drying in post-harvesthandling will further increase the proportion. Thegermen segmentation is inhibited by ultravioletillumination from sunshine while the germen epi-dermis cell stops growing because of shortage ofwater due to the limited moisture. These …