ZigBee技术在智能家居中的应用

介绍了ZigBee技术的无线通信原理和特性,对智能家居环境做出了一定的分析,并在基于ZigBee技术是一种低功耗、低成本、易应用的近距离无线通信技术,设计了一款可以广泛应用于智能家居的遥控设备。     

蓝牙和Wi-Fi在可穿戴计算机中的应用研究与设计

可穿戴计算机的移动性和便携性等特点,决定了无线通信技术在可穿戴计算机中的广泛应用。从可穿戴计算机的概念和特点出发,运用蓝牙和Wi-Fi无线通信技术构建了一个用于可穿戴计算机的无线网络连接控制系统模型,主要介绍了硬件设计方案,以及解决蓝牙和Wi-Fi相互干扰问题的方案。从而为可穿戴计算机能够在近距离内实现无线通信奠定了一些基础。     

正交频分复用系统中同步技术研究

正交频分复用(oFDM)是一种高效的调制传输技术,将被广泛地应用于新一代无线通信系统中.文章介绍了OFDM系统的基本概念,引出OFDM系统的同步技术的重要性,重点对栽波同步、符号同步及样值同步作了原理陈述和性能分析,介绍了同步算法基本步骤,并提出了同步算法的实现方案.     

超宽带中信道估计算法的研究

首先介绍了超宽带的应用现状,超宽带与其它短距离无线通信技术相比具有明显优势。接着阐述了当前UWB系统中信道估计算法的研究状况,并详细说明了各个算法的优缺点。最后,对进一步需要研究的问题进行了讨论。     

超宽带无线通信技术

超宽带（UWB）无线通信技术是近年来备受关注的一种高速、低功耗的无线通信技术,在简单介绍超宽带无线通信的概念基础上,着重分析了超宽带无线通信的特点和应用。     

浅谈近距离无线通信技术中的关键技术

所谓近距离无线通信技术,就是我们经常可以看到的NFC技术,NFC技术是短距离的通信技术,已经成为Sony、NOKIA等主推的一种通信标准。这篇文章主要从NFC技术在各个方面的应用,传输模块以及NFC技术的关键性技术进行详细的分析解说。     

物联网技术与LTE无线通信技术研究

本文首先介绍了物联网技术与LTE无线通信技术的含义,然后分析了物联网技术与LTE无线通信技术的结合基础,最后探讨了物联网技术与LTE无线通信技术结合的实践应用,以期为促进不同行业领域的信息化发展提供一些参考。     

无线网络融合的QoS研究分析

随着无线通信技术的发展,不同网络之间通信的要求也越来越高,无线网络的融合使得网络之间优劣互补,其中需要解决的关键技术很多,而要满足不同业务类型用户的需求,QoS保障尤为重要,本文分析了不同网络的QoS保障机制,研究了关键的QoS相关算法,并对资源管理算法进行扩展探讨旨在适应无线网络融合的特点,进一步提高无线通信的服务质量,更好地满足用户的需求。     

基于无线通信技术的行车调度管理系统设计与实现

针对无线通信技术的特点和应用,本文分析了无线通信技术在涟钢冷轧厂行车应用的总体架构,提出了一种将无线通信技术应用于行车管理系统的体系结构,详细介绍了该系统的体系结构、功能、特点,以及实现的关键技术.     

超宽带无线在通信技术领域的应用

随着社会的进步与发展,超宽带无线通信技术作为一种新的通信方式己逐渐成为目前重点研究的课题,它的问世解决了过去困扰短距无线通信技术的各种问题,本文简要介绍了无线通信的概念,超宽带技术特点,并探讨了超宽带无线在通信技术的应用。     

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.     

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.