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随着通信、计算机技术的提高与普及,以及对地震前兆仪器智能化、数字化和网络化的最新要求,山西省地震学会组织有关专家和技术人员研制成功了DJY-2000A型地震电磁波脉冲观测系统。该系统是在DWMJ-89A(B)型微电脑电磁脉冲记录仪的基础上,对原有的一些缺陷进行了改进,并增加了许多新的功能而研制成的新一代产品。DJY-2000A型地震电磁波脉冲观测系统主要由LES低频电磁传感器、前置转换器、DJY-2000A型电磁脉冲记录仪、数据传输与处理软件、计算机系统及配套设备组成。该系统的主要功能如下:1)打印显示功能 8位LED显示打印功能,可选… 相似文献
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随着通信、计算机技术的提高与普及 ,以及对地震前兆仪器智能化、数字化和网络化的最新要求 ,山西省地震学会组织有关专家和技术人员研制成功了 DJY- 2 0 0 0 A型地震电磁波脉冲观测系统。该系统是在 DWMJ- 89A(B)型微电脑电磁脉冲记录仪的基础上 ,对原有的一些缺陷进行了改进 ,并增加了许多新的功能而研制成的新一代产品。DJY- 2 0 0 0 A型地震电磁波脉冲观测系统主要由 L ES低频电磁传感器、前置转换器、DJY- 2 0 0 0 A型电磁脉冲记录仪、数据传输与处理软件、计算机系统及配套设备组成。该系统的主要功能如下 :1)打印显示功能 … 相似文献
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电磁波异常与相关地震的探讨 总被引:2,自引:0,他引:2
在对地震电磁波产生机理基础的分析上,结合近年来观测实践,深入具体的分析了震前电磁波的短临异常与相关地震的对应关系,同时也总结了观测仪器的有效使用与技术改进,从而展示了电磁波预报地震所具有广阔发展前景。 相似文献
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MDCB型地震前兆监测仪映震效果分析 总被引:3,自引:1,他引:3
对MDCB-Ⅱ型地震前兆监测仪观测获得的类地应力值,异常频度和8方位异常值等参数进行了比较深入的分析及其与地震关系的研究。资料反映的事实表明,在一定距离,一定强度的地震的短临阶段,确定存在着电磁波异常现象,其动态趋势,变化次数,异常突变和异常方向性反映等参数,可为地震预测预报研究提供科学判据。 相似文献
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地球系统科学综述 总被引:14,自引:0,他引:14
首先从人类面临全球性的重大问题、地球系统的全球化和地球系统科学的关系与传统地球科学三个方面介绍了地球系统科学提出的背景,阐述了地球系统科学国内外研究现状.然后,详细介绍了地球系统科学的概念与研究方法,主要包括研究思路、基本概念、地球系统过程、全球——区域信息获取、海量信息处理和分析及地球系统模型等.第三,构建了地球系统科学理论基础.主要包括:地球系统的连续动态系统、离散动态系统、地球系统的随机性、地球系统的自组织和地球系统的简单巨系统与复杂巨系统,重点介绍了地球系统科学子系统与各圈层相互作用的动力学模型与效应.第四,概述了地球系统的数字表达一数字地球和地球系统科学是可持续发展战略科学基础.最后,简述了中国开展地球系统科学研究的方向和面临的主要科学问题。 相似文献
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为解决传统巷道内空调通风系统存在的信息采集准确率较低,性能较差、抗震巷道环境难以改善等问题,提出设计一种新的抗震巷道内空调通风系统。先将系统的整体架构划分为采集层、控制层和监管层三部分,以主控制器为核心,对系统各执行组件做出正确地判断,并对各组件进行统一化控制,完成系统的硬件设计;创建中心服务器信息处理过程,设定风机运行指令,主动采集风速等环境信息,获取实际环境状态,将设定值与实际值进行对比,依据对比结果判断风机是否正常运行,实现系统软件功能的开发。实验结果表明,在不同的震级条件下,该系统能够有效改善抗震巷道环境,系统的信息采集准确率高达85%左右,充分验证了该系统的优越性。 相似文献
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当前的地震模拟系统存在用户指令传达不及时、系统反馈不准确的问题,针对这些问题,提出一种改进的地震模拟系统人机交互设计方法,构建地震模拟系统的整体交互流程。通过设计4×4按键电路、LCD接口电路,完成键盘与显示器之间的数据传输、用户指令的传递;同时引入虚拟现实技术设计人机交互的脚本、代码。实验结果表明,所设计的地震模拟系统人机交互模式的稳定性高达98.9%,准确率高达99.6%,能够有效实现地震模拟的人机交互。 相似文献
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Raymond M. Caron Claire Samson Paul Straznicky Stephen Ferguson Luise Sander 《Geophysical Prospecting》2014,62(2):352-363
Carleton University and Sander Geophysics are developing an unmanned aircraft system (UAS) for aeromagnetic surveying. As an early indication of the expected performance of the unmanned aircraft system, a simulated unmanned aircraft system (sUAS) was built. The simulated unmanned aircraft system is a T‐shaped structure configured as a horizontal gradiometer with two cesium magnetometers spaced 4.67 m apart, which is the same sensor geometry as planned for the unmanned aircraft system. The simulated unmanned aircraft system is flown suspended beneath a helicopter. An 8.5 km2 area in the Central Metasedimentary Belt of the Grenville Province, near Plevna, Ontario, Canada, was surveyed with the simulated unmanned aircraft system suspended 50 m above ground. The survey site was chosen on the basis of its complex geological structure. The total magnetic intensity (TMI) data recorded were compared to that obtained during a conventional fixed‐wing survey and a ground survey. Transverse magneto‐gradiometric data were also recorded by the simulated unmanned aircraft system. The simulated unmanned aircraft system total magnetic intensity data have a higher resolution than the conventional fixed‐wing data and were found to have a similar resolution to that of the ground survey data. The advantages of surveying with the simulated unmanned aircraft system were: (1) the acquisition of a detailed data set free of gaps in coverage at a low altitude above the terrain and (2) substantial saving of time and effort. In the survey site, the 4.67 m simulated unmanned aircraft system gradiometer measured the transverse magnetic gradient reliably up to an altitude of 150 m above ground. 相似文献
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为了提高地震信息网络数据存储的效率和稳定性,本文提出一种地震信息网络数据的动态储存方法。首先,设计和分析地震信息网络数据的动态存储系统中的硬件部分,基于Hadoop的分布式集群大数据动态存储系统,整合多台存储服务器,为一个集群系统,并平衡存储服务器负载情况,获取性能指标的比例值,通过加权公式获取综合性能参数,根据综合负载指标和服务器综合指标参数获取最佳存储服务器。对本文系统、高速数据存储系统和网络编码云存储系统进行大数据动态存储对比实验。实验结果表明:地震信息网络数据的动态存储耗时最短,存储效率最快;具有较高存储稳定性,且不会出现过载问题。 相似文献
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Progress and performance evaluation of BeiDou global navigation satellite system: Data analysis based on BDS-3 demonstration system 总被引:5,自引:0,他引:5
The first two Medium Earth Orbit (MEO) satellites of the third generation of BeiDou satellite navigation System (BDS-3) were successfully launched on November 5, 2017. This historical launch starts the new era of the global navigation satellite system of BeiDou. Before the first two satellites of BDS-3, a demonstration system for BDS-3 with five satellites, including two Inclined Geosynchronous Orbit satellites (IGSO) and three MEO satellites, was established between 2015 and 2016 for testing the new payloads, new designed signals and new techniques. In the demonstration system, the new S frequency signal and satellite hydrogen clock as well as inter-satellite link (ISL) based on Ka-band signals with time-division multiple addresses (TDMA) were tested. This paper mainly analyzes the performances of the demonstration system, including the signalto- noise ratios, pseudorange errors and the multipath errors of the civilian signals of BDS-3. The qualities of signals in space, time synchronization and timing precision were tested as well. Most of the performances were compared with those of the regional BeiDou satellite navigation system (BDS-2). At last, the performances of positioning, navigation and timing (PNT) of the future BeiDou global system (BDS-3) were evaluated based on the signal quality of the present demonstration satellite system. 相似文献
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选取2020年3月1日至12月31日速报地震,通过对比自动地震速报和人工地震速报结果,对自动地震速报系统产出结果进行偏差分析。该时段内自动速报系统共产出国内地震事件216次,漏报49个地震,未发生误报地震。自动速报地震震中位置平均偏差为6.7 km,震级平均偏差为0.15,平均用时119 s。震中位置偏差较大主要由台站分布不均匀、缺少近台、台站空隙角过大及系统自动拾取的震相误差较大所致。震级偏差较大主要是震级转换算法不合理等造成的。自动速报漏报地震与系统在地震定位时初至到时信噪比较低、台站分布不均匀和地震的孤立性等有关。此外,还对全国自动地震速报系统的改进提出了建议。 相似文献
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Henglong Xu Gi-Sik Min Joong-Ki Choi Jae-Ho Jung Mi-Hyun Park 《Marine pollution bulletin》2009,58(9):1278-1285
Structural and functional parameters of periphytic ciliate communities were studied for monitoring water quality in Korean coastal waters during April 2007. The PFES (polyurethane foam enveloped slide) system, a modified glass slide method, was used to analyze periphytic ciliate colonization in marine ecosystems. A total of 27 ciliate species were identified using living observation and silver impregnation method with this system. Although the ciliate colonizations had similar species composition, they represented considerable differences in both structural and functional parameters between the PFES system and the conventional slide system. The species diversity, evenness and the colonization rate (G) were distinctly higher, but the time for reaching 90% equilibrium species number (T90%) was shorter in the PFES system than those on the naked slides. Results suggest that the PFES system is more effective than the conventional slide method for periphytic ciliate colonization with high species diversity, evenness, and colonization rate in marine ecosystems. 相似文献