当前厂房中的中央空调安装要点

探讨当前厂房中的中央空调安装要点,及中央空调机组在厂房中的安装、中央空调风机盘管在厂房中安装时因注意的事项及管路的布置进行了综述,以及对厂房中的中央空调安装遇见的常见问题进行了分析,提出了一定的解决方案,供同行参考.     

中央空调运行维护及清洗保养

中央空调系统由冷热源系统和空气调节系统组成,因此,我们应该正确的维护、保养清洗工作,只有这样才能延长中央空调的使用寿命,并节约能源。文章提倡的事运用科学高效的方式、熟悉中央空调的主要构成结构,以及中央空调的运行维护以及清洗保养手段论述,对提升中央空调的运行维护清洗保养工作的措施进行分析。     

户式中央空调与家用空调的区别与经济性分析

所谓家用中央空调,也可称为户式中央空调.本文从安装,维修保养、制冷效果、节能环保等方面对户式中央空调和目前大量使用的分体空调进行比较分析,并对两种空调进行技术经济评价.     

浅谈中央空调安装中的常见问题与解决措施

越来越多的办公楼都安装了中央空调,它可以调节空气的温度、湿度、洁净度等,但是随着中央空调安装工程的不断增多,也暴露出很多细节问题,影响到了中央空调的使用质量,中央空调质量的好坏关键在于安装过程中。如何尽量避免这些失误,保证工程质量、实现预期的设计目标,是需要施工管理人员高度重视的。结合施工实践经验,针对办公楼中央空调的安装施工技术进行探讨和分析。     

浅析商业综合体中央空调的主要计费模式

为了提升中央空调系统的应用效益,进行计费模式的分析是必要的,这需要针对中央空调系统运行费用构成进行分析,将其作为研究对象,做好中央空调的运行费用的分析,从而更有效的进行商业综合体中空调运行费用的理论判断。     

浅谈中央空调的主要组成部分及其维护保养

中央空调系统广泛应用于工业及民用设施,随着存有量和新增量逐年攀升,新技术新方法不断应用,给中央空调的维护保养工作提出了挑战。本文对中央空调系统的主要组成部分及其运行原理进行了介绍,并详细说明了各个部分的维护保养方法。     

中央空调系统节能改造技术应用的研究

中央空调系统对改善建筑内部环境、改善人们生活质量具有积极意义,但存在高能耗问题,严重影响了经济持续发展,因此,必须对中央空调系统进行节能改造。本文简要分析了中央空调节能改造的必要性,并从空调冷热源系统、输配系统及自控系统三方面进行改造技术及其应用分析。     

中央空调在厂房中的安装要点分析

一些精密器件的生产对环境的要求较高,例如,一些芯片和电子企业需要在厂房中安装中央空调系统,鉴于此,本文对厂房中中央空调安装要点进行详细的探讨,以期为中央空调的顺利安装提供参考。     

浅谈中央空调控制特点与节能技术

本文首先对中央空调的控制原理和特点进行分析,重点对中央空调的节能优化控制的途径进行探讨,希望能够达到作为相关参考作用的目的。     

中央空调通风系统清洗技术及措施

由于中央空调通风系统的污染及其不合理的使用,已经成为建筑物室内空气污染的主要来源之一。中央空调通风系统风管内结垢和微生物及由此产生的腐蚀故障,对系统的安全及低成本的运行影响极大,所以,必须定期进行清洗中央空调通风系统。     

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.     

Our Own Devices: Heterotopic Communication, Discourse, and Culture in the Information Society 1

The main premise of this article is that in information societies generally, and in virtual social contexts particularly, a distinctive style of interaction to facilitate the communication of difference, heterotopic communication , has emerged. It rests on two cultural foundations: an ideological belief in the positive, socially integrating power of communication, and a prevailing ethic of instrumental rationality, subjective individualism, and strategically practiced self-interest. The former is demonstrated by the use of simulation and spectacle as sources of information; exhibitionism/voyeurism as a communicative style; and the awareness of surveillance. The latter is seen in the competitive use of knowledge as a commodity; a surface globalism masking deep parochialism; lateral as well as vertical information inequity; and the use of public versus private as strategies for engagement rather than as spaces. Those who engage in heterotopic communication resort to their 'own devices' both in the sense of personal agendas, strategies, interests, and interpretations, and in the form of the telecommunication tools that help realize them. These personal and technological devices allow individuals with the right educational and technical resources to avoid exposure to disagreement, difference, or other information that does not serve their direct purposes or reflect their particular views of the world; yet they also help convey the appearance of openness, availability, and cooperation. This style of interaction is used strategically in combination with information and communication technologies to gain social or economic advantages, but it may encourage social separatism and parochialism, inhibit the negotiation of disputes, and emphasize competing interests.