基于FTP协议的地震前兆数据收取软件     

陈向军  马学军  张文来 《地震地磁观测与研究》2012,33(5):330-334

为了提高新疆前兆台网中心日常工作效率,减轻工作人员负担,充分考虑到目前新疆数字前兆台站的数据接收方式,依据前兆数据管理细则,结合FTP技术,利用Delphi软件开发环境研制了一套基于FTP协议的地震前兆数据收取软件,可以满足新疆前兆地震台网中心的日常工作需求,同时提高工作效率。  相似文献   

基于CAN总线技术的电极控制器设计     

葛双超  王兰炜  张世中  颜蕊  朱旭 《地震地磁观测与研究》2012,33(3):182-188

分析目前多极距测量系统存在的问题,将CAN总线技术应用于多极距地电阻率测量系统中,研制基于CAN总线技术的新型电极控制器。详细介绍电极控制器的主要特点、工作原理、硬件结构设计以及通信协议。经过各种性能测试,结果表明,该电极控制器稳定可靠,符合多极距地电阻率观测要求。  相似文献   

河南测震台网波形记录时间监控程序开发     

陈力刚  王志铄  郅红魁  郑培玲  贾漯昭  赵大鹏 《地震地磁观测与研究》2014,(3):298-302

针对地震速报时间误差带来的问题,提出解决问题的重要性,分析时间获取的途径和原理,通过C＋＋提供的 SOCKET 套接字及其函数,结合地震数据采集器协议,提供实例方案,最终达到应用效果。  相似文献   

Dating results on sedimentary quartz,bones and teeth from the Middle Pleistocene archaeological site of Coudoulous I (Lot,SW France): A comparative study between TT-OSL and ESR/U-series methods     

《Quaternary Geochronology》2015

This study presents palaeodosimetric results from the Middle Pleistocene archaeological site of Coudoulous I (Lot, SW France). Nine sedimentary quartz samples (41–60 μm) have been analyzed using a multiple aliquot protocol based on the measurement of the TT-OSL signal. In addition, 7 teeth and 7 bones have been dated by combining the ESR method with U-series analyses. Both methods gave consistent age results allowing correlation of the Early Middle Paleolithic Human occupation of the site to MIS 6 and part of the Lower Paleolithic tools to MIS 7. Beyond the establishment of a radiometric chronology for the Coudoulous I sequence, this study focuses on the information extracted from the intercomparison of the methods. Our data suggest that 1) the TT-OSL signal is stable over at least the last 230 ka (considering the age range of the studied samples), 2) there are not significant problems of incomplete bleaching leading support to the applicability of the TT-OSL technique for sedimentary deposits associated with karstic contexts. This approach highlights the interest of combining luminescence and ESR/U-series methods to discuss the reliability of the dating results.  相似文献   

改善VSAT卫星链路网际互联的技术途径   总被引：1，自引：0，他引：1  

唐迎欣  周肃敏 《地震》2001,21(4):75-79

在卫星通信网上运行TCP/IP协议时,因电波空间传播产生的卫星链路时延,严重降低了TCP协议数据流的传输速率和通信效率。选择适当的TCP数据流发送窗口值,不能从根本上提高TCP数据流的传输速率。对于采用卫星通信链路作为传输信道的计算机广域网,在卫星站网关上使用TCP“协议欺骗”技术,能够显著提高TCP/IP协议在卫星通信网上运行的效率。文中给出了采用TCP/IP“协议欺骗”后实测的结果。  相似文献   

基于互联网的震后虚假信息入侵实时检测系统设计          下载免费PDF全文

彭懋磊  刘可  李垠  吕筱 《地震工程学报》2020,42(1):270-275

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   

Nonsymmetrical loading protocols for shear links in eccentrically braced frames     

Musab Aied Qissab Al-Janabi  Cem Topkaya 《地震工程与结构动力学》2020,49(1):74-94

The AISC Seismic Provisions for Structural Steel Buildings (AISC 341-16) provide a testing protocol for qualification of link-to-column connections in eccentrically braced frames (EBFs). This symmetrical testing protocol was developed by conducting nonlinear time history analysis on representative EBFs designed according to the International Building Code. Although the testing protocol is intended for qualification of link-to-column connections, many research programs have employed this recommended protocol for testing of shear links. Recent numerical investigations on constructed EBFs and archetype models showed that links can be subjected to one-sided loadings with significantly higher link rotation angles than the codified limits. A numerical study has been undertaken to develop nonsymmetrical loading protocols for shear links in EBFs. Pursuant to this goal, 20 EBF archetypes were designed according to the ASCE7-16 standard. The main parameters investigated were the link length to bay width ratio (e/L), number of stories, type of EBF, and the ground motion level. The archetypes were subjected to maximum considered earthquake and collapse level earthquake as recommended by FEMA P695. The results showed that the history of link rotation is single sided and depends strongly on e/L and the level of ground motion. Nonsymmetrical loading protocols that depend on the aforementioned variables were developed and are presented herein.  相似文献   

遥感图像处理软件设计中插件技术的应用     

王宏勇  张杰  张永生 《海洋测绘》2005,25(2):34-36

首先给出了插件的定义及引入插件的意义,然后阐述了插件的原理及关键技术,最后给出了插件设计的步骤和在遥感图像处理软件中的实现方法。  相似文献   

构筑物强震监测无线网络系统设计     

唐巍  滕云田  王喜珍  王晓美  胡星星  刘高川 《地震地磁观测与研究》2008,29(5):89-93

以MEMS构筑物强震监测仪器为节点,采用XMesh自组网路由协议,构造了构筑物的强震监测无线网络系统,实现了构筑物强震监测无线组网。设计了无线网络远程监控界面,实现了无、线网络的远程实时监控。测试了点到点时无线网络性能,试验结果表明,在≤50Hz采样率时能实现可靠的实时监测。  相似文献   

基于ASCOM标准的天文电动调焦器设计     

和寿圣  丁旭  王传军  范玉峰  余晓光  王德清  黄永萍  伦宝利 《天文研究与技术》2021,(2):255-262

随着天文技术的不断发展,远程观测和自主观测逐渐成为天文观测的主流趋势,自动调焦技术也越来越受到重视。电动调焦器是天文望远镜不可或缺的附属设备,是实现自动调焦的关键设备。为实现云南天文台丽江观测站10英寸米德望远镜的自动调焦,自行研发了一套天文电动调焦器,设计相关控制电路,制定串口通信协议,并编写了一套开源天文公共对象模型(Astronomy Common Object Model,ASCOM)驱动程序SS Focuser,详细介绍了该电动调焦器的结构原理和实现方法,实测结果表明,电动调焦器具有很好的稳定性,完全满足设计要求,为天文电动调焦器设计提供了可借鉴的经验和方法。  相似文献