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全国地震分析预报计算机信息网络(APnet)是中国地震局地震分析预报专业网络系统,它通过APnetWeb体现,主要功能包括地震会商、地震目录、前兆数据、震情、应急等信息的收集和查询服务。APnetWeb基于MVC结构。中扼要概述了MVC(Model-View-Controller)结构特点,Struts框架的体系结构实现了MVC设计模式,并将这些设计模式映射到Web应用程序的组件和概念中。MVC是Web Application应用开发的领先设计模式。详细介绍了基于MVC结构的APnet Web应用传输系统的特点,介绍它的实现方法,包括Struts技术、Xml格式档以及数据库结构,如何提供安全、便捷的信息服务系统,以及APnet Web网站的功能和APnet Web网络应用。 相似文献
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基于MAS的地震速报信息短信发布 总被引:1,自引:1,他引:0
《地震地磁观测与研究》2015,(5)
设计基于MAS的地震速报短信发布系统技术路线,详述Web Service接口实现MAS短信服务的关键技术,以及消息封装、加密及解密的具体方法。对系统的时效性进行测试,结果表明,基于MAS的信息发布系统,延时小,发送速度快,尤其大批量短信发布,时效性更高。 相似文献
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虚假震后信息入侵严重干扰抗震救灾与灾后重建进程,为防止虚假震后信息在互联网中大肆传播,需对震后虚假信息进行精准识别,设计基于互联网的震后虚假信息入侵实时检测系统。互联网以Web服务器为载体传播信息,数据包捕获模块采用WinPcap技术,并从中获取有效数据包,在协议解析模块中完成数据包TCP/IP协议、CMP协议、UDP协议解码工作,解码后的数据输入到基于SVM的震后虚假信息检测模型中。SVM模型寻求最优超平面将震后信息分为虚假与真实两个类别,根据该结果完成震后虚假信息入侵实时检测。由实验结果可知该系统检测震后虚假信息入侵误报率低于3%,相比同类型系统具有接收数据能力强、效率高的优势,对精准检测震后虚假信息具有重要意义。 相似文献
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Autodesk MapGuide是集GIS技术、数据库技术和网络发布技术于一体的非常流行的WebGIS产品,中简要介绍了该产品的基本构成和特点,并结合发布地震信息的实例详细叙述了该产品的使用方法,包括配置Web服务器以支持WebGIS信息发布,建立MapGuide Server数据源,用MapGuide Author通过添加图层、建立数据源连接和设置空间对象样式来制作地图件,制作地图件发布网页和MapGuide Viewer插件下载网页等,并介绍了如何用ASP技术生成查询报表。 相似文献
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利用WindowsNT4.0及其所带的Internet Information Server和Active Service Page,结合SQLServer数据库,构筑动态Web信息系统已经是一项比较成熟的互连网技术。以宁夏地震局动态Web信息系统的建设为例,对上述技术方案中的一些基本概念、关键技术五一节等问题做了详细的阐述。 相似文献
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《地震地质》2015,(4)
对中国活动断层数据库建设的发展成果进行了简单介绍,以"华北构造区活动断层探测和调查基础数据库信息共享平台"的建设过程为例,讨论了通过Web GIS实现活动断层数据发布与共享的可行性,Web GIS技术可较好地解决活动断层数据的共享问题。共享系统总体目标是快速安全地共享高精度、专业化的活动断层数据。系统采用B/S模式流行的3层架构结构:GIS服务器+Web服务器+客户端浏览器,后端数据库是将多个华北地区的活动断层子库集成后的总数据库。系统不但具有基本的浏览、查询功能,还可以进行条件查询、点击查询、断层定位等细粒度的操作。现阶段系统建设重点放在了"数据共享的实现"和"数据精度"上,借助GIS的强大功能还可以实现更多,比如在线编辑、自定义GP模型等。 相似文献
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介绍了基于Web的流动地震监测数据库查询系统的开发背景和目的,描述了数据库查询系统的设计和实现过程。该系统借助Internet/Intranet网络,以B/S(浏览器/服务器)体系结构作为基础架构,采用WAMP集成化软件开发,具有系统加密、数据查询、数据维护、数据导出和资料下载等功能。 相似文献
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《Ground Water Monitoring & Remediation》2000,20(4):56-60
In 1957, four computers across the United States were linked to form the first version of what we now know as the Internet. The Internet has grown beyond what anyone working in the U.S. Department of Defense Advanced Research Projects Agency (DARPA) more than 40 years ago could have imagined. Yet despite the phenomenal growth of Internet users, and access to information in all fields of endeavor, finding genuinely useful and helpful resources is still a challenge. This article distils information on the most useful Internet listservers for environmental professionals working the site remediation. 相似文献
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Integrative fuzzy set pair model for land ecological security assessment: a case study of Xiaolangdi Reservoir Region, China 总被引:5,自引:1,他引:4
Shiliang Su Xia Chen Stephen D. DeGloria Jiaping Wu 《Stochastic Environmental Research and Risk Assessment (SERRA)》2010,24(5):639-647
Due to the increasingly serious ecological degradation of land systems, the land ecological security issues have attracted
more and more attention of policy makers, researchers and citizens. Aiming at overcoming the disadvantages in subjectivity
and complexity of the currently used assessment methods, an integrative fuzzy set pair model for assessing the land ecological
security was developed by integrating fuzzy assessment and set pair analysis (SPA). The approximate degree of land ecological
security to the optimal standard set was calculated to describe the secure level by combining multiple indices. The indices
and weights were determined by a pressure-state-response model and the fuzzy analytic hierarchy process (AHP), respectively.
Aided by a geographic information system, this model was applied to evaluate comprehensively the status of land ecological
security in Xiaolangdi Reservoir Region, China, taking the administrative division as the assessment unit. The results showed
that 20% of the total area maintained a slightly secure status, while 50% of the study area was of a middle or seriously low
grade of land ecological security. The remaining portion (30%) was the most ecologically insecure. From the spatial prospective,
obvious variations were observed. The land eco-security gradually decreased from the Xiaolangdi Dam to its surrounding regions.
It was concluded that the status of the integral land ecological security of Xiaolangdi Reservoir Region was in the middle
level, and increasingly intense human activities speeded up the degradation of regional land ecosystem in recent years and
thus induced the crisis of land ecological security. 相似文献
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依托“中国地震数据观测网络”项目,中国地震局地震预测研究所建立了以十三陵地震中心台为前兆台网部,8个无人值守的前兆台站为一体的前兆观测系统。 这套系统利用中国联通的CDMA 1X网络将台站接入到Internet网络,并利用VPN(Virtual Private Network)技术在Internet网络上开辟一条安全、 稳定传输隧道,实现了前兆台站、 观测设备与十三陵前兆台网部的信息集成。 文中以十三陵地震前兆观测系统为例,主要介绍了如何利用CDMA 1X 无线网络和VPN(Virtual Private Network)技术实现前兆观测系统信息集成。 十三陵地震前兆观测系统的正常运行证明,利用CDMA 1X +VPN技术的前兆观测系统组网模式可以做到投资少、 见效快、传输可靠等优势,值得推广应用。 相似文献
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对于地震数据管理中心来说,地震数据的安全性和可用性极为重要,重要的数据(不管是在线的还是离线的)一旦被破坏或丢失,就会给我们的工作造成重大的影响,甚至是难以弥补的损失。将损失降至最小的最行之有效的办法莫过于地震数据的安全存储。地震数据的安全存储离不开数据的安全备份。数据的安全备份来自设备安全和应用安全两个方面。本文重点论述地震数据存储的设备安全与应用安全的要点和常见误区。 相似文献
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为增强地震专题图发布的时效性,提升地震专题图服务能力,设计了一套基于MQTT协议的地震专题图自动生成和推送系统。该系统通过移动互联网与地震速报系统之间保持长连接,利用MQTT协议实时接收地震速报信息,根据地震烈度衰减模型生成地震影响场,然后运用ArcPy站点包进行相关空间分析和自动出图,最后利用企业微信的开发接口,实现了地震专题图的快速发布。地震专题图自动生成和推送系统已向福建省地震局和各地级市地震局相关人员提供服务,并在数次中国台湾的地震中取得良好效果。 相似文献
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强震观测数据库建设与Internet服务 总被引:2,自引:0,他引:2
提出基于web的强震数据库建设目标、数据模型、web数据库设计;在建立web数据库的基础上进一步研究强震数据库数据源和质量控制,讨论入库数据的信息范围及标准、数据的常规处理和录人流程、数据分级方式、数据产品产生方法;介绍中国大陆强震观测数据和Internet服务内容。 相似文献
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Kung‐Juin Wang Keh‐Chyuan Tsai Shiang‐Jung Wang Wei‐Choung Cheng Yuan‐Sen Yang 《地震工程与结构动力学》2007,36(15):2307-2323
This paper develops new techniques for integrating a number of different structural laboratories together through the Internet in order to jointly conduct a single structural experiment. A computer‐networking platform, called Platform for Networked Structural Experiments (PNSE), was developed to achieve this goal. PNSE runs directly on top of the Transmission Control Protocol/Internet Protocol (TCP/IP). It is a multi‐client system consisting of a number of client programs, which include one command generation program and a number of facility control programs, connected to a server program via TCP point‐to‐point connections across the Internet. An associated application protocol, called Networked Structural Experiment Protocol (NSEP), was developed to work with the PNSE. In addition to communication rules, the NSEP defines general experimental information, significant laboratory events, commands and signals, as well as obligated behaviours of all PNSE programs. Both domestic and transnational pseudo‐dynamic (PSD) tests were performed to verify the validity and efficiency of the PNSE. Test results showed that on the PNSE: signals were correctly transmitted; significant laboratory events were promptly reflected; and data transmission was remarkably efficient, with the round‐trip time (RTT) between Taiwan and the United States less than 0.1701 s. The characteristic of environment independency was also demonstrated through the successful collaboration of different facility control programs running on different operating systems. Copyright © 2007 John Wiley & Sons, Ltd. 相似文献