installed on to the users hard drive. By shifting processing power away from the server, and on to the users own desktop search utilities offer a much greater range of search and results analysi functionality. Like several of the second-generation search technologies that have emerged (Electric Monk Google)many of these search utilities incorporate intelligent agents (or bots). Indeed, many of the powerful features offered by search utilities, such as language independent searching, filtering automatic refinement of results, and document summaries, active hyperlinking of query words and live highlighting are possible because of the nature of intelligent agents. Unlike a standard software program that will execute specific functions within clearly defined parameters, agents/bo are adaptive-they can interpret monitored events to make appropriate decisions are self-organising--they assimilate both information and experience; can communicate with both the user and other bots Agents can search across a wide range of document types and formats. They can provide a uniform interface for search queries across different sources and are true " informediaries" in that they can identify and search appropriate resources that may or may not be known to the researcher The adaptive element of intelligents is central to the functionality of many search products that incorporate agents. The following popular search utilities, which all contain agent technology,are available as free downloads and as more comprehensive paid versions MataHari(www.thewebtools.comcanlearmonesetofpowersearchcommandsandthen automatically translate these for each search service/database that it queries for the user BulleEyePro(wwwintelliseek.com)incorporates11differentintelligentagents,including technology from Verity to conduct what it calls"Web mining". The different agents are used to target specfic types of information such as business news in over 450 sources on both the visible and invisible Web. It will automatically run searches, allows import/export of searches to other users, whilst users can choose to receive change alerts by HTML e-mail, pager or other hand-held Copermic(www.copernic.com)cantranslateasearchstatementfordifferentservicesandthen simultaneously submit the query to these search engines, Web directories and databases. There are about 20 categories such as business and finance, science, etc, with predetermined Web sources to search in Recognising the advantages offered by search utilities, some search providers have released a variety of free basic search utility programs as"plug in". As the name suggests, once installed they are incorporated within the user s browser and enable the search engine provider to offer more features. Search providers that have released search utilities include Infoseek, Alta Vista, nd more recently lycos A common function of agents is that they allow the user to specify a high-level goal instead of issuing explicit instructions, leaving the""and"when"decisions to the agent. This, combined with their ability to search across data in unstructured formats, to automatically learn and adapt te user preference and to identify patterns, is giving agent technology an ever increasing role in Web searchIng
22.2因特网图书与期刊信息检索 1图书馆公共可检索目录(OPAC) 因特网的发展冲破了图书馆的目录只能在本馆范围内使用的限制。近年来世界各地的图 书馆在建设数字图书馆系统的进程中,已将传统的图书馆的目录发展为“联机图书馆公共可 检索目录”( Online Public Access Catalog--OPAO)。这是一个基于网络的书目检索系统,它 在网上提供书目信息检索服务。网络用户可在自己终端检索世界各地图书馆的OPAC。从清 华大学图书馆的网页( Url wWw.Lib.tsinghua.edu.cn/chinese/otherlib)可以查到部分国内联 网图书馆的URL。另外在 Yahoo!的总目录中按路径 Reference-Library向前,也可以连接 到世界各地各类图书馆的主页,检索其OPAC。另外已知某大学的URL,一般可推测出其图 书馆的URL,例如:OxfordUniversity的URL是htp:/www.ox.ac.uk,则其图书馆的URL 为:htp:/www.lib.ox.ac.uk。图23是康奈尔大学工程图书馆的主页。 ORNELL nformation services H≡ . EASP standard Newsletter subject, Clan Bib a velae Cellastic Proqert erede inman) web af sciea dienes 4 23 The Engineering Library of Cornell University 2电子期刊 学术期刊是传递科技信息、交流学术思想最简便最基本的手段,也是科技工作者获取 学术信息的最主要的渠道。随着因特网尤其是万维网的广泛应用,近年来电子期刊也大量 出现。可以说电子期刊时代已经到来。据报道目前最大的电子期刊网站之一, electroni Joumalaccess(Urlhttp:///www.coalliance.og)收录了几千种网络电于期刊。很多电子期 刊目前还只提供其印刷版本的目次和文摘。也有不少电子期刊提供全文。还有一些是纯粹 的电子期刊,它们只有电子版本没有印刷版本。检索期刊信息的重要网站还有 The Intermet Directory of Publications lttp://www.publst.com MediaFinder http://www.mediafinder.com Excites Newstracker http://www.chinainfo.gov.cn Wiley InterScience http://www/interscience,wiley.com 中国工程技术信息网 lttp://www.cetin.net.cn
3机械工程专业信息检索 ASME( American Society of Mechanical Engineers ) SAE Society of Automobile Engineers),和 IMECHE( Institution of Mechanical Engineers)等机械工程学术组织也在网上 发表学术期刊,公布学术活动信息,它们也提供信息服务。它们的网址分别是: ASME http://www.asme.org(e2.4) SAE hup/www.sae.org(图25) IMECHE http://www.imeche.org.uk(e2.6) ASME Ha 24 American Society of Mechanlcal Engineers 握 TEANATNNAL HH 25 Society of Automobile Engineers
The institution of Mechanical Engineers 4: 2.6 Institution of Mechanical Engineers ASME在网上提供的学术活动内容非常丰富,有电子期刊和学术会议的信息,有关于 纳米技术 Nanotechnology的讨论,还有 irtua! Campus,它提供 Distance Learning,包括 raduate Online Courses,及面向其他对象的 Continuing Education。对机械工程技术人员来 说ASME是一个值得重视的网站。 ASME出版的期刊主要有 APPLIED MECHANICS REVIEW HEAT TRANSFER RECENT CONTENTS JOURNAL of APPLIED MECHANICS JOURNAL of BIOMECHANICAL ENGINEERING JOURNAL of COMPUTING AND INFORMATION SCIENCE IN ENGINEERING JOURNAL of DYNAMIC SYSTEMS, MEASUREMENT, and CONTROL JOURNAL of ELECTRONIC PACKAGING JoURNAL of ENERGY RESOURCES TECHNOLOGY JOURNAL of ENGINEERING FOR GAS TURBINES AND POWER JOURNAL of ENGINEERING MATERIALS AND TECHNOLOGY JOURNAL of FLUIDS ENGINEERING JOURNAL of HEAT TRANSFER JOURNAL of MANUFACTURING SCIENCE AND ENGINEERING JOURNAL of MECHANICAL DESIGN JOURNAL of OFFSHORE MECHANICS AND ARCTIC ENGINEERING JOURNAL of PRESSURE VESSEL TECHNOLOGY JOURNAL of SOLAR ENGINEERING JOURNAL of TRIBOLOGY
JOURNAL of TURBOMAchinerY JOURNAL of VIBRATION AND ACoUSTICS 下面摘录了几种期刊的内容介绍 1 JOURNAL of COMPUTING AND INFORMATION SCIENCE IN ENGINEERING jCiSE publishes archival research results and advanced technical applications in the areas of Internet-Aided Design and Manufacturing, Virtual Reality Environments and systems, Information Models/Ontologies for Engineering Applications, Al/Knowledge Intensive CADICAM, Enginee ring Simulation and Visualization, Computer aided Product Development, PDMEnterprise Infor mation mana at, Embedded Computing, and technology aspects of computers in engineering education. In addition to full-length research papers, JCISE has a separate application track that features software and technology reviews, software/data exchange standards updates, and inno- vative applications of computing and It in mechanical product development. 关于档案的,记人档案的 embedded 植入的,深入的,内含的 VR abbr. Virtual Reality,虚拟现实 abbr. Aritificial Intelligence,人工智能 2 JOURNAL OF TRIBOLOGY One of the, most respected archival journals in the field of tribology, the Journal of Tribology publishes over 100 outstanding technical articles of permanent interest to the tribology community annually, and attracts articles by tribologists from around the world. The joumal features a mix of experimental, numerical, and theoretical articles dealing with all aspects of the field, including but not limited to: friction and wear, fluid film lubrication, elastohydrodynamic lubrication, surface operties and characterization, contact mechanics, magnetic recordings, tribological systems seals, bearing design and technology, gears, metalworking, lubricants, and artificial joints. In addition to being of interest to engineers and other scientists doing research in the field, the information published in the journal is also of great importance to engineers who design or use mechanical components such as bearings, gears, seals, magnetic recording leads and disks, or prosthetic joints, or who are involved with manufacturing processes Tribology 摩擦学 elastohydrodynamic lubrication 弹性流体动力润滑 齿轮,传动装置调整,(使)适合,换挡 rtificial joints 人造关节 prosthet 弥补性的,置换的 3 JOURNAL OF ENERGY RESOURCES TECHNOLOGY Addressing the wide-ranging topic areas of petroleum drilling, production, refining processing, transportation, and equipment and vehicles for sea underwater usage, the Journal presents peer-reviewed technical papers as well as briefs which are an excellent way to present new computing algorithms, experience with new measurement devices, evaluation studies, etc. Specific areas of importance include (but are not limited to ) offshore mechanics and technology