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随着海上交通事故的频繁发生,快速准确的搜救落水人员变得愈加重要。本文主要介绍了AIS个人搜救示位标的概念、组成、性能指标和工作方式,并制作AIS个人搜救示位标样机实际演示其在海上搜救方面的应用。结果表明:AIS个人搜救示位标在海上搜救方面表现稳定可靠。 相似文献
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鉴于保障探险旅游安全,规避探险风险成为旅游业面临的越来越突出的问题,初步构建了基于北斗短报文通信和GSM技术的搜救系统.该系统能够快速定位遇险人员的位置,及时通知其家人和相关机构组织搜救人员快速实施搜救行动,有效低降低人员财产损失. 相似文献
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当前,我国自然灾害以及人为因素导致的重大安全事故不断发生,尤其是经济的快速发展,导致火灾事故不断增多,严重威胁着人类的安全和社会的稳定。本设计有别于传统的搜救定位方法,它是通过探测火灾中的被困人员随身携带的手机从而间接获取被困人员的位置信息。该搜救系统能解决目前搜救方式的单一性和不灵活性,特别是用在大面积灾区的搜救行动中,能体现出该系统的高效率。能迅速获取火灾中的人员数量及位置分布情况,从而为救援力量的部署和搜救行动提供指导。 相似文献
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CCTV(Closed Circuit Television)水上搜救指挥中心监控系统是一个综合性、数字化的多级网络监控系统,通过现代化搜救指挥中心CCTV监控平台,在第一时间发现险情之后,系统会自动记录并保存事故现场情景,监控系统根据船舶的事故位置,在不影响其他船只的正常通行情况下,来判断是否需要进行临时交通管制。该系统可以极大地提高海事管理工作效率。本文对该视频监控系统在海事管理中的应用进行了阐述。 相似文献
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The authors describe the development trends and results of millimeter-wave systems in Japan in such fields as communication, radar, and measurement systems. The applications included are the W-40G waveguide transmission communication system, an automobile traffic control system using the 60-GHz band, a collision avoidance radar system for an automobile, a plasma electron density measuring system, and satellite communication. The authors describe the development of devices such as high-power FET amplifiers, traveling wave tube amplifiers (TWTAs), IMPATT amplifiers, low-noise amplifiers, and monolithic microwave integrated circuit (MMIC) devices used in constructing the millimeter-wave systems 相似文献
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《Electron Devices, IEEE Transactions on》1972,19(4):524-531
A review is given of the progress in electrophotographic science and technology in Western Europe during the years 1967 to early 1971. University research work is mainly directed towards two areas: 1) the electrical and physical properties of photoconductors, such as selenium, chalcogenides, oxides, and organic materials; and 2) the sensitization of these photoconductors. Industrial research teams report on the preparation of electrophotographic layers on development and on image evaluation. A bibliography including scientific papers and patents published on this subject during said period completes this review. 相似文献
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Experiments have been performed to investigate whether switching phenomena are observable in ion-irradiated GaAs. It is found that the V/I characteristics of H2+-and N+-irradiated layers show both negative resistance and switching from a high resistance to a low resistance state. Ion irradiation may thus be a useful method of fabricating switching devices. 相似文献
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Before the establishment of the People's Republic, China was a semi-colonial, semi-feudal society plagued by foreign interventions and internal power struggles. It was against this background that the electrical industry went through its infancy. Today, the People's Republic of China is facing an acute energy shortage, posing a problem which must be quickly overcome if the country's rapid industrialisation is to continue as planned. The author presents a brief history of power generation in China from 1949 to 1983 and examines possibilities for the future 相似文献
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Ghana has recognized the need for efficient and reliable telecommunication services. The widespread availability of these services will promote the nation's economic advancement and the decentralization of the government's activities. To achieve the objective of bringing telecommunications to all the people of Ghana, private sector participation is considered essential as a source of management skills, technology, and financing that will be required for the provision of services. In order to attract such participation, Ghana is putting in place the necessary policy, institutional, and regulatory frameworks to create an enabling environment for private sector investment in the telecommunication sector 相似文献
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游小明 《信息安全与通信保密》2003,(5):16-17
信息安全在IT业中的角色演变 在当今信息时代,信息技术日新月异,信息产业已经成为拉动GDP增长的第一支柱产业,并以每年20%—30%的速度迅猛发展。其发展过程也经历了从传统IT向新型IT的转变,其中一个重要的转变因素便是信息安全。 1.传统IT与信息安全的关系。传统IT涵盖了五大类:通信、网络、计算机、软件、电子材料及元器件。这五类IT行业本身的发展一度呈现结构失衡:一方面过度投资到“信息高速公 相似文献
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中国带电清洗技术的突破 总被引:2,自引:0,他引:2
一、电路故障的成因 通常,由于空气的污染和设备所处的环境及管理条件不同,空气中的灰尘、油污、酸碱及其气体、盐分、潮气、炭渍、金属尘埃、各种机械杂质等污染物质,不可避免地吸附在电路表面及其它部位,加之静电累积和在电场力的作用下,污秽的累积不断加重和变得牢固,各种污秽牢牢附着在线路表面,深层及各部位。灰尘、油污、酸碱及其气体、盐分、潮气、炭渍、金属尘埃、各种 相似文献