网格数据挖掘在信息服务质量评价中的应用

网格的数据挖掘是数据挖掘技术与网格计算的有机结合,文章介绍了网格数据挖掘的概念、特点、网格数据挖掘技术的优点,网格数据挖掘的体系结构,讨论了网格的数据挖掘的基本过程,并从开放网格服务体系结构出发,给出了网格平台下的信息服务质量数据挖掘的功能和执行过程。     

数据挖掘研究进展及其发展趋势

本文从数据挖掘的概述出发,总结了数据挖掘的分类、数据挖掘的主要方法、国内外数据挖掘研究现状。并对数据挖掘的进展及其发展趋势进行了阐述。     

国内数据挖掘工具研究综述

在对国内数据挖掘工具的相关文献计量分析的基础上,综述了其三大研究主题:数据挖掘工具的分类、数据挖掘工具的介绍与开发、数据挖掘工具比较与评价,并归纳了数据挖掘工具研究的两个发展方向:专业领域数据挖掘工具的开发、数据挖掘工具的分类评价.     

数据挖掘技术在提高教学质量中的应用研究

本文论述了数据挖掘的基本知识,包括数据挖掘的定义、数据挖掘的方法、数据挖掘的过程;讨论了从学院已有教学数据中通过数据挖掘技术找出可提高教学质量的几个方面.     

浅析数据挖掘技术的发展及应用

由于数据挖掘在各行业中的广泛应用,因而该技术引起了人们的普遍关注,介绍了数据挖掘的分类方法和目前采用较普遍的一些数据挖掘方法,分析、总结了数据挖掘技术在商业、Web挖掘、科学研究等几个主要领域的应用情况,综合论述了数据挖掘未来的发展趋势。     

数据挖掘综述

随着计算机技术的迅猛发展,数据挖掘技术越来越受到世界的关注。从数据挖掘的概念出发,介绍了数据挖掘的对象、功能及其挖掘过程,结合数据挖掘的几种常见挖掘算法：决策树法、关联规则法和神经网络法等,对其主要思想及其改进做了相关描述;总结了国内外数据挖掘的研究现状和应用,指出了数据挖掘的发展趋势。     

探索可视化数据挖掘技术在信贷政策导向效果评估中的应用

数据挖掘技术的崛起与发展为银行业的信息化建设提供了一个新的起点,在美国金融领域已经得到了普遍应用。本文将可视化技术与数据挖掘技术相结合,产生了可视化数据挖掘技术,把快速、自动的数据挖掘算法与人脑的认知能力、判断能力结合起来,可以大大提高数据挖掘过程的质量和速度。     

空间数据挖掘技术理论及方法

论述了空间数据库技术及空间数据挖掘技术的理论及特点,分析了空间数据挖掘技术的层次、方法,并重点介绍了当前常用的分类、聚类、关联规则等空间数据挖掘方法,指出了当前空间数据挖掘技术中尚需解决的问题、发展趋势及方向。     

试论数据挖掘中的遗传算法

本文对数据挖掘进行了概述，阐明了数据挖掘的概念、数据挖掘在商业中的意义。如何进行数据挖掘及数据挖掘流程，提出了数据挖掘技术中的一个重要算法-遗传算法的基本原理以及遗传算法在数据挖掘技术中的地位。提出了基于遗传算法的关联规则的提取方法。文章还给出了用遗传算法进行关联规则挖掘的实例，并讨论了数据挖掘技术所面临的问题和挑战。     

数据挖掘技术及其应用

数据挖掘是数据库研究中一个很有应用价值的课题,它融合了数据库、人工智能、机器学习等多个领域的理论和技术.本文介绍了数据挖掘的定义、功能、常用技术、数据挖掘过程,以及数据挖掘的应用.     

Students' Reactions to the Introduction of Videoconferencing for Classroom Instruction

This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors.     

Cooler temperatures inductive to locust outbreaks

Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007.     

Exploring Multiplexity: Social Network Structures in a Computer-Supported Distance Learning Class

A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction.     

To serve and promote science development via innovation

CAS should stick to the principle of rendering service to, and giving impetus for, the development of China＇s science enterprise by making S＆T innovations, said CAS President LU Yongxiang. The CAS president made the remarks in a recent talk to communicate the gist of the winter session of the Party＇s Leading-member Group at CAS, which was held from 7 to 11 January in Beijing.     

Tracing the origin and early radiation of birds——Paleornithologist ZHOU Zhonghe

With great care, Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer and says: "This is the gem of our collections: the fossil of a bird that lived 125 million years ago!" Then, pointing at a tiny mound, he explains: "Look, this is the claw and that is the head. It was in the egg shell and ready to hatch ... The species fell into a family of waterside inhabitants."     

The Role of Intermediating Institutions in the Diffusion of Electronic Data Interchange (EDI): How Industry Associations Intervened in Denmark, Finland, and Hong Kong

Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies.     

How Electronic Publishers are Protecting Against Piracy: Doubts About Technical Systems of Protection

The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means.     

Rough Justice: A Statistical Assessment of ICANN's Uniform Dispute Resolution Policy

Long-standing conflict between domain name registrants and trademark holders prompted the Internet Corporation for Assigned Names and Numbers (ICANN) to create a global, mandatory arbitration procedure known as the Uniform Dispute Resolution Policy (UDRP). The UDRP has been used in 2166 cases involving 3938 domain names as of 1 November 2000. The policy gives the initiator of a complaint, generally a trademark holder, the right to choose which ICANN-accredited dispute resolution service provider (RSP) will handle the case. During the preparation of the UDRP,some feared that complainant selection would lead to "forum shopping" that might bias the results. This article performs a statistical assessment of the forum-shopping thesis and finds support for it. There are statistically significant differences in the various RSPs' propensity to take away names from defendants; there are also major differences in the number of cases brought to each RSP. RSPs who take away names have the larger share of cases. The study examines other variables that might explain differences in market share, such as price, the plaintiff's nationality, or the time taken to decide a case. It finds that nationality and time also are correlated with market share. The study concludes that shopping for a favorable outcome is an important factor in the UDRP.     

Prevalence of soft neurological signs in Chinese people

Prof. Raymond C.K. Chen, a neuropsychologist with the CAS Institute of Psychology, has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology.     

Monoculture Rubber Plantations Have Negative Ef ects on Controlling Splash Erosion

<正>In Xishuangbanna,one of China’s most biodiverse regions,landscape has changed dramatically during the past three decades due to the conversion of tropical rainforest to rubber plantations.In steep areas,terraces are often constructed before planting rubber trees,which causes two important changes in the soil:the destabilization of soil in the bench terraces and the increased vulnerability of unvegetated riser faces to erosion.Few studies have documented the nature and intensity of erosion on bench terraces.Prof.LIU Wenjie and his colleagues from the Xishuangbanna Tropical Botanical Garden(XTBG)conducted a study in Menglun County(21°5′39″N,101°15′55″E),Xishuangbanna to evaluate the influence