三维广义Fourier变换中的二分屏蔽效应及应用

对阶跃函数在三维广义傅氏变换的屏蔽效应进行了探讨，给出了相关定理的证明，提出了半屏傅氏变换法和应用，从而进一步拓宽了傅氏变换在解数学物理方程的适应范围。     

三维广义Fourier变换中的二分屏蔽效应及应用

对阶跃函数在三维广义傅氏变换的屏蔽效应进行了探讨,给出了相关定理的证明,提出了半屏傅氏变换法和应用,从而进一步拓宽了傅氏变换在解数学物理方程的适应范围。     

合分比定理在证明三角条件等式中的应用

本文探讨了应用合分比定理证明三角条件等式问题,并就合分比定理在证明三角条件等式中的应用等方面进行了探讨。     

关于电磁屏蔽原理与技术的探讨

从电磁屏蔽的屏蔽原理出发,阐述了电磁屏蔽的分类及特点,并探讨了屏蔽材料的性能和应用场合,简要介绍了电磁屏蔽技术.     

竞争情报四分卫法实施及案例分析

作为竞争情报搜集的有效方法之一,四分卫法为我们提供了全新的视角,并经过不断的实践积累逐渐走向成熟。为更好的诠释这种高效的竞争情报搜集方法,本文讨论了竞争情报四分卫法实施及案例分析,阐述了四分卫法的诸多特点以及改进措施,希望能够为四分卫法的进一步发展有所帮助。     

屏蔽的目的及方法

随着电子产品的广泛应用电磁环境污染在加重,屏蔽技术的研究变得越来越重要.据此,本文讨论了电场屏蔽、磁场屏蔽、电磁屏蔽的目的及屏蔽的方法.     

关于最大平面图着色的探讨

“最大平面图"的定义 如图一,“最大平面图”是每个面都是一个三角形的平面图,实际上是一个既有陆地又包括海洋在内的球面地图,它是一个具有不可约图的3个特性(1,图是最大平面图;2,图是5-色的顶点着色法;3,图是临界的收缩。)中最重要特性的图。     

《关于最大平面图着色的探讨——希伍德的反例是4-色的》和推翻了希伍德的“五色定理“

在《四色定理普遍地证明》研究中,我发现希伍德的"反例"和"五色定理"都是错误的.揭开了希伍德在证明"反例"上有重大错误的秘密,并证明希伍德的反例是4-色的;指出了希伍德套用数学归纳法来证明"五色定理"的做法是错误的;从而推翻了希伍德的"反例"和"五色定理",为《四色定理普遍地证明》打下了基础.     

1050 MW机组配套四分仓回转式空气预热器漏风控制研究

通过对百万千瓦机组配套四分仓回转式空气预热器漏风机理进行研究，分析影响空气预热器漏风的因素，寻找控制漏风的方案。从基建安装、运行检修的视野探索控制空气预热器漏风的策略，从而降低空气预热器的漏风量，提高锅炉的效率。     

竞争情报四分卫法探析

会议、会展是竞争情报工作重要的公开搜集途径之一,竞争情报四分卫法则是针对会展情报搜集的一种典型方法.本文初步探讨竞争情报四分卫法,从四分卫的概念起源入手,阐释四分卫法的定义,分析其特点和适用范围等.此外,对照传统四分卫,提出电子四分卫技术的优势,分析四分卫技术的发展方向.     

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.     

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     

Chinese Scientists Use Earth Observation Technologies to Study and Protect Wild Camels

<正>Chinese scientists plan to apply Earth Observation technologies to protect the critically endangered wild camels(Camelus ferus).With the help of remote sensing,satellite positioning,geographical information system and wireless sensors networks,they will be able to access the distribution and population of the wild camels and protect their habitats.The project will be carried out by the International Research Center for Wild Camel Conservation,which was jointly established earlier this year by the Institute of Remote Sensing and Digital Earth(RADI)of the Chinese     

More than Skin Deep – Understand Skin Biology by Means of Dermatogenomics

<正>The Paul Gerson Unna Research Group on Dermatogenomics was founded in October 2012 at the Partner Institute for Computational Biology.The ultimate goal of the group is to understand the biology of skin and skin appendages.