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为了解决传统防盗报警器无法及时将报警信息实现远程无线传送的问题,文章利用单片机和GSM模块设计了一种远程家庭防盗报警系统。系统使用热释电红外传感器作为探测模块,单片机和GSM模块作为系统的控制模块和信息发送模块,以实现远程报警的功能。该报警系统电路结构紧凑,易于隐蔽,用户操作简单、易懂、灵活,在智能家庭防盗等领域有较好的应用前景。 相似文献
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当前,家庭安防系统得到了日渐广泛的应用,且日趋智能化。以ARM为基础,研发的智能家庭安防系统,具备图像抓拍、远程监控、打包下载以及快速报警等诸多功能,能有效实现智能化的家庭安防。本文浅析了基于ARM的智能家庭安防系统的硬件优化和软件优化,以期为智能家庭安防系统优化提供借鉴。 相似文献
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本设计是一种智能环境监控系统,通过单片机与各种传感器、报警单元相连,实现实时监控和报警功能,该产品除了基本的环境监测功能外,还能提供智能分析判断功能,且设备实用性强,可广泛应用于环境监测领域。 相似文献
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随着人们生活水平及社会科技水平的发展进步,人们对居住小区的安全、舒适、快捷、智能化的要求越来越高,其中安防智能化小区已经成为一种流行趋势,为人们的生活带来了巨大的安全和便利。本文首先从小区智能安防系统设计遵循的主要原则出发,对小区智能安防系统的设计和应用进行了探讨,并对未来这一系统的发展趋势进行了展望。 相似文献
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安防产品市场巨大财富良机机不可失 近年来,随着贫富差距的不断增大,各地人室盗抢案例时有发生,造成无数家庭巨大的经济损失及人员伤亡。高档小区的安防监控系统虽能监控到公共区域却无法监控到住户的家中,更不能自动报警,而看似坚实的防盗门、防盗网也只能防君子不防小人。如何加强家庭防护,把小偷盗贼拒之门外,营造一个安全、舒适、高效、便利的居住环境,已成为广大人民最根本、最迫切的渴望! 相似文献
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谭斌 《大科技．科学之谜》2014,(5):292-293
随着计算机技术的发展,物联网技术越来越广泛地被应用于各各领域。基于3G的物联网报警系统的设计,可有效提高小区物业管理水平,为小区的安全提高更可靠的保障。本文将对3G物联网环境下小区安防报警系统的硬件、软件设计进行研究分析,旨在为小区安防报警系统设计水平的提高提供科学借鉴。 相似文献
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系统以 Cortex-M3为内核的 STM32单片机来控制 GSM 模块及热释电传感器模块,并应用于家庭防盗报警系统中.SIM900A 模块是一款尺寸紧凑的 GSM/GPRS 模块,能支持中文短信息,该模块集射频电路和基带于一体,向用户提供标准的 AT命令接口.STM32单片机具有低功耗、高性能的特点.红外专用芯片 BISS0001设计的人体传感模块能以非接触方式检测出来自人体发出的红外辐射,并将其转化成电信号输出.结合以上芯片,附加扬声器报警可达到家庭智能防盗的目的. 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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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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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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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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《中国科学院院刊(英文版)》2008,22(1):2-3
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. 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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《中国科学院院刊(英文版)》2008,22(1)
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." 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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Leah A. Lievrouw 《The Information Society》2000,16(2):155-159
This essay focuses on universal service and the Internet as means to support social and political participation. The emphasis on access to telecommunications systems in conventional approaches to universal service is contrasted with access to content. A model of the information environment is described that accounts for the roles of content and conduit, both of which are necessary conditions to achieve true access. A method is outlined for employing information indicators to observe or measure the information environment. 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