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文章分析了基于GSM网络的通用短信息控制系统工作的基本原理,简介了该系统中应用的主要技术,阐述了基于GSM网络的短信息控制系统的基本组成,并提出了该系统的硬件和软件设计方法,最后,对该系统的工程应用作了评价和讨论. 相似文献
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本文设计一个智能报警系统,将短距离无线传输与GSM远程通信相结合,实现多个房间的远程报警。当监控场所发生紧急情况(盗窃、气体泄漏等)时,通过无线传输模块向主机发送报警信号。主机现场发出声光报警,并通过GSM向户主发送短信息实现远程报警。当有多个房间报警时,在用户短信息中能显示出报警的房间号和报警类型。 相似文献
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家居办公的智能化和远程可监控是电器用户长期追求的目标之一。基于GSM无线通信的家用电器远程控制系统是一种造价低廉、简单易实现的远程控制系统。利用普通手机和GSM网络对远端短信接收器进行短信控制,可完成对各种家用电器,如冰箱、空调、电脑等开关的简易控制。由于GSM网络已在全球范围内实现了联网和漫游,所以利用短信模块传送／接收信息对家用电器进行控制,具有实时、方便、快捷等优点。 相似文献
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校园网的飞速发展为高校实现数字化、网络化办公提供了必备的基础平台和技术条件,文章主要针对高校数字化办公网络系统展开了设计探讨,给出了详细的高校网络办公系统的平台模式与功能模块的设计,并结合数字化网络办公系统设计中的关键技术进行了分析研究,从数据实时同步和网络办公信息的安全性两个角度进行了设计,对于进一步提高校园网的应用水平、实现高校数字化网络办公,以及实现高校数据信息资源的优化配置均具有一定的借鉴意义. 相似文献
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当前的网络协同办公系统普遍存在自适应能力差、功能模块不易修改和扩展的问题。为了解决这一问题,本文提出了一种基于动态工作流的网络协同办公系统建模方法,将一种改进的动态工作流模型进入网络协同办公系统中。在对现有工作流模型分析的基础之上,本文提出一种基于预设任务集和后继任务集的改进的动态工作流模型。该模型由一个五元组构成。利用该模型可以让网络办公系统中的信息自由流动,允许用户根据需求定制系统平台的设计,具有跨平台的特点,并且能够实现高效的办公信息自动处理。 相似文献
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为解决轨道涂油器的设备状态远程监控的问题,方便维护人员及时了解设备故障情况,设计一个基于GSM技术的短信息远程报警系统,介绍了以华为公司GTM900A模块与STC12C5A60S2单片机为核心的整体软硬件设计、GSM的标准AT指令与具体软件编程方法,设计的系统运行稳定并应用在轨道涂油器设备上。 相似文献
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随着信息技术的迅速发展,一种崭新的办公方式办公自动化已被信息社会所应用,它有效融合了信息网络技术与企业现代化办公应用,实现企业办公信息化管理。将工作流模型引入到办公自动化系统中,可有效组织机构内部员工通过网络跨越时间、地点协同工作,从而合理优化管理方式,进而提高办公效率、降低运营成本。本文对企业办公自动化系统基于工作流的应用进行了需求分析,探讨了基于web的网上协同办公系统的体系结构。 相似文献
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在一些大型工业生产中,涉及的设备数量很多,有些系统和设备由运行人员进行24小时监控,或定期巡检,而有些系统和设备基本是无人值守运行,或检查周期较长,及时获得这些系统和设备的运行状态,对保障安全生产,缩短故障处理时间有重要作用,而GSM短信息服务(ShortMessageService)在传送信息方面可以发挥作用。本文主要探讨了在PDU模式下通过串口向GTM900-C模块发送AT指令来实现短消息收发的过程并给出了通过PC机实现短消息发送的具体实例。 相似文献
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Marjorie Armstrong-Stassen Margaret Landstrom Ramona Lumpkin 《The Information Society》1998,14(2):153-164
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. 相似文献
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A joint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology his co-workers from Norway US 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 the National Academy of Sciences on September .…… 《中国科学院院刊(英文版)》2008,22(1):6-7
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. 相似文献
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Caroline Haythornthwaite 《The Information Society》2001,17(3):211-226
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. 相似文献
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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. 相似文献
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A research group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol-a chemical found in the skins of red grapes in red wine-can improve the sensitivity of mice to the hormone insulin according to a report in the October issue of Cell Metabolism.…… 《中国科学院院刊(英文版)》2008,22(1):14-15
Aresearch group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol--a chemical found in the skins of red grapes and in red wine--can improve the sensitivity of mice to the hormone insulin, according to a report in the October,2007 issue of Cell Metabolism. As insulin resistance is often characterized as the most critical factor contributing to the development of Type 2 diabetes, the findings“provide a potential new therapeutic approach for preventing or treating” both conditions, the researchers said. 相似文献
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Puay Tang 《The Information Society》1998,14(1):19-31
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. 相似文献
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Milton Mueller 《The Information Society》2001,17(3):151-163
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. 相似文献
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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.…… 《中国科学院院刊(英文版)》2008,22(1):15-15
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. 相似文献
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Active biological molecules functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery disease diagnosis therapy new nanodevice construction.…… 《中国科学院院刊(英文版)》2008,22(1):22-22
Active biological molecules and functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery, disease diagnosis and therapy, and new nanodevice construction. 相似文献
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《中国科学院院刊(英文版)》2014,(3)
<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 相似文献