科技信息资源虚拟联盟间信息质量约束机制的构建     

宋立荣 《中国科技资源导刊 (中国信息导报)》2014,(4):79-85

在众多科技信息资源共享模式中,虚拟联盟是实现科技信息资源共建共享的有效组织形式之一,在我国 科技信息资源共享建设中发挥重要作用。但由于不同共享建设单位的资源状况各异、技术条件不同、信息资源质量不 同、数据管理能力水平不齐,使得虚拟联盟间共享信息资源的信息质量问题成为最重要和迫切需要解决的问题之一。 为此,本文提出以构建信息质量约束机制为切入点为科技信息资源共享建设中虚拟联盟间的信息质量管理提供一个基 本分析框架,有助于采取新的质量管理思路、方法和措施进行信息质量的改进,更接近于实践中IQ问题的解决。它包  相似文献   

基于DMBOK的电动汽车多源信息决策支持系统 数据质量管理过程研究     

齐娜  赵辉  张英杰 《中国科技资源导刊 (中国信息导报)》2014,(4):20-24

依据国际数据管理协会数据管理知识体系（DMBOK）中的数据质量管理过程,分析了电动汽车多源信息 决策支持系统中的数据特点以及建设中存在的问题,提出改进建议,并初步构建适用于电动汽车多源信息决策支持系 统的数据质量管理流程。  相似文献   

高校图书馆的多功能化设计与实现探索——以上海交通大学李政道图书馆为例     

陈煦蔚  张浩  郭晶 《图书与情报》2014,(5)

文章以集图书馆、博物馆、档案馆、科技馆、美术馆"五馆"功能合一的上海交通大学李政道图书馆为例,探讨了多功能高校图书馆的功能设计、馆藏资源建设与实现途径。  相似文献   

Fictitious Academic Expertise and Processing Resources     

Patrick Chambres  Rmy Versace  Catherine Auxiette 《Contemporary educational psychology》2001,26(4):507

A previous study showed that pairs of students interacting in a second language produced more words when they were assigned a fictitious expert position in a specific competence dimension than when they were assigned a nonexpert position. It has also been shown that the usual level of expertise has an impact on the assigned fictitious expertise effect. The present study was designed to determine whether the processing capacity allotted to the current task could partly determine performance. A given position of expertise may demand a large or small attentional capacity. Two experiments were conducted using a dual-task paradigm. As expected, the different expertise positions led to different reaction times on the secondary task. The second experiment showed that the impact of assigning a position of expertise to students depends on their usual academic standing. This study supports the idea that in interactive situations, performance variations as a function of the expertise position can be partially explained by differences in the processing resources allocated to the task. Implications for teaching are discussed.  相似文献   

基于到达时间差的无线传感器网络中Sybil攻击检测方案   总被引：1，自引：0，他引：1  

温蜜  李辉  郑燕飞  陈克非 《上海大学学报(英文版)》2008,12(1):66-70

As wireless sensor networks （WSN） are deployed in fire monitoring, object tracking applications, security emerges as a central requirement. A case that Sybil node illegitimately reports messages to the master node with multiple non-existent identities （ID） will cause harmful effects on decision-making or resource allocation in these applications. In this paper, we present an efficient and lightweight solution for Sybil attack detection based on the time difference of arrival （TDOA） between the source node and beacon nodes. This solution can detect the existence of Sybil attacks, and locate the Sybil nodes. We demonstrate efficiency of the solution through experiments. The experiments show that this solution can detect all Sybil attack cases without missing.  相似文献   

基于垂直扫描显微干涉技术的高精度轮廓仪     

戴蓉  谢铁  邦龚文  常素萍 《上海大学学报(英文版)》2008,12(3):255-260

A profilometer used for 3 dimension measurement of micro-surface topography is presented. The instrument is based on the vertical scanning microscopic interferometry （VSMI）. A Linnik type interference microscope is used and the interferograms which present changes of surface profile are recorded with a CCD camera. A developed nano-positioning work stage with an integrated optical grating displacement measuring system realizes the precise vertical scanning motion during profile measurement. By a white-light phase shifting algorithm of arbitrary step, frames of interferograms are processed by a computer to rebuild and evaluate the measured profile. Because of the specialty of VSMI, the profilometer is suitable for both smooth and rough surface measurement. It can also be used to measure curved surfaces, dimension of micro electro mechanical systems （MEMS）, etc. The vertical resolution of the profilometer is 0.5 nm, and lateral resolution 0.5 μm.  相似文献   

港口吞吐量抽样调查方案设计     

余思勤 《上海海事大学学报》1995,(4)

讨论了抽样调查在港口吞吐量调查中的应用前景，分析了港口吞吐量抽样调查方案设计的各个环节，包括：方案设计的原则、技术方法、抽样公式、调查时间、分层确定、季节变动处理和非抽样误差控制等。  相似文献   

江苏省部分竞走运动员个性特征的研究   总被引：1，自引：0，他引：1  

陈刚 《湖北体育科技》2001,20(2):36-38

运用卡特尔16种性格因素测量表对江苏省部分竞走运动员的性格类型进行了调查，按性别、运动成绩分组对照，并进行分析和研究，以期为竞走运动员的心理选材、心理训练提供一些参考依据。  相似文献   

提高软件质量的有效途径——个体软件过程(PSP)   总被引：1，自引：0，他引：1  

赵慧勤  赵慧玲 《大同职业技术学院学报》2005,(1)

信息时代,软件质量的重要性越来越为人们所认识,个体软件过程(PSP)为提高软件质量提供了具体而有效的途径.本文主要介绍了PSP的相关技术,讨论了PSP的质量管理,阐述了CMM/PSP/TSP的体系结构.  相似文献   

The Donkey of the Prophet in Shī‘ite Tradition     

Khalid Sindawi 《Al-Masaq: Islam & the Medieval Mediterranean》2006,18(1):87-98

The present study examines the treatment of the Prophet's mount in Shī‘ite tradition. We discuss the different opinions concerning the ass's name, ‘Ufayr or Ya‘fūr and present various traditions concerning utterances spoken by it, including utterances addressed to the Prophet, and other cases of human-like behaviour on its part, such as an ability to distinguish Muslims from Jews. We then go on to compare the Prophet's ass to those of other prophets, and find a number of similarities between them, in particular their ability to speak a human language. We also discuss the ass's death, which according to Shī‘ite tradition was by suicide, occasioned by the ass's fear following his master's death that someone else, not a prophet, would use it as a mount. We compare the Prophet's ass to those of Noah, and Solomon's Hoopoe, and show how Shī‘ite tradition has focused on similarities among them and utilized those to support the idea of the Imāmate as the Prophet's legacy in Shī‘ite doctrine. We further discuss the preference which Shī‘ite Imāms had for asses as against other mounts, a preference based on their wish to follow in the Prophet's footsteps.  相似文献