共查询到20条相似文献，搜索用时 62 毫秒
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文章介绍了一种多参数水质监测系统。该系统可以同时监测水位、水温、pH值、溶解氧、氧化还原电位、电导率、氨氮、氯离子等8个参数,包括三部分:监测系统主机(地下水水质监测系统)、地面仪器(GSM通讯系统)和室内终端接收系统,监测到的数据可以通过GSM公共服务网无线传输。其中重点介绍了以MSC1210Y5为核心的主机系统以及在开发调试中需注意的问题。MSC1210系列芯片是美国德州仪器公司新近推出的一种功能很强的带24位A/D转换器的微处理器芯片,其一些增强特性适合在测量精度要求高、输出信号微弱的场合使用。以该芯片为核心的多参数水质监测系统具有结构紧凑、功耗低等特点,适合野外长期观测的需要。 相似文献
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《地壳构造与地壳应力文集》2010,(0)
随着无线通信技术的发展,GSM(Global System for Mobile Communications)技术为实现远程管理地下水位监测系统提供了途径。多点监测的地下水位监测系统在远程控制和数据传输上实现远程管理,使监测过程变得容易和便捷。文章介绍了GSM技术在多点监测的地下水位监测系统中的设计与实现,给出了监测系统的实现结构,分析了实现的关键技术。实际应用表明,基于GSM的远程管理的地下水位动态监测系统是一种经济、可靠的监测系统。 相似文献
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汾河运城段水质综合评价李锋，荆洁（山西省运城地区环境保护监测站）（山西省运城市环境保护局）费秀丽（山西省运城地区水利局）１水质综合特征模式表达式水质综合特征模式表达式有两种，一种是参加水质评价的各个水质参数监测统计值均低于ＧＢ３８３８－８８《地面水环... 相似文献
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地球空间传感器网络将无线传感器网络与地理信息系统、全球定位系统、卫星遥感等技术进行了有效的交叉与融合,但目前仍缺乏统一的体系结构;因此,提出了一种面向水质监测的地球空间传感器网络架构,重点内容是其中数据管理子系统的软件设计与具体实现。考虑到监测数据具有分布式、多源、异构等特点,因而数据管理子系统的设计是基于面向服务的软件体系架构（SOA）,采用富互联网应用（RIA）技术作为主要的软件开发方式,使整个系统具有自动刷新、负载平衡等特点。通过在加拿大安大略省的具体应用,与传统的各种水质监测手段进行对比,该架构具有监测内容更全面、数据显示更直观等优势。 相似文献
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在鄂尔多斯地下水勘查项目的实施中，西安地质矿产研究所与国际原子能机构合作，引进了一套英国Geovista公司生产的井下电视与井下水质分析系统——Geovista Borehole Logging and Camera Systems。利用该系统的井下水质分析系统，可连续测定钻孔中地下水的水温、电导率、pH值和含氧量等水文地质参数，利用这些参数可以了解弱透水层和隔水层对水质的影响，查明每一含水层的水质情况， 相似文献
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面对现阶段环境监测系统在远程以及实时监控等多方面中存在的不足,本文设计了一种以单片机和GSM网为基础的草原生态环境监测系统,该系统使环境监控的网络化和远程化得到了实现。 相似文献
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文中介绍了一种地面沉降自动化监测的系统方案，该系统是由上位机和下位机组成的分布式结构，数据传输通过公用电话网实现。系统的硬件部分包括位移传感器、控制主机、现场模块控制单元以及调制解调器等，其中传感器应用了CCD(电荷耦合型固体摄像器件)技术，精度可达到0．1mm以上。整个系统均在系统控制软件环境下进行，通过它，可任意设置监测计划，如：每小时测2次或更多；还可以随时了解系统设备的工作状况。通过在长江三角洲地区的数月实地使用，认为这套系统具有精确、可靠、自动化程度高等优点。可以满足实际需要。虽然，自动化技术已广泛应用于许多领域，但在地面沉降监测方面还不多见，有望此项工作能对相关研究有所帮助。 相似文献
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本文介绍了一种新型的利用分层热塑性复合材料做成的管道来内部修复老化的高压输液和输气管道的方法。该方法有以下几个显著的优势：（1）可以安装在狭窄的以及其它一些以前修复时需要挖开主管道的部位,以避免过高的工程费用;（2）显著提高了主管道的压力等级;（3）避免了由于腐蚀所造成的强度损失;（4）能实时监测管道的泄漏和外部的损伤。该管道有两种安装方法,一种用于连续的长距离紧密配合安装,另一种用于长度短、直径大的（例如作为套管接头）宽松配合安装。本文简要介绍了这项新技术的要求及该管道的两种制造和安装方法,并分析了内部修复加固时过流面积的亏损。把计算机仿真、实际测试与自我监测系统有效的结合,确保该智能管道系统的安全性和经济性,这种方法也在文中作了介绍。 相似文献
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Emily Keeble David I. Whiteside Michael J. Benton 《Proceedings of the Geologists' Association. Geologists' Association》2018,129(2):99-119
Pant-y-ffynnon Quarry in South Wales yielded a rich cache of fossils in the early 1950s, including articulated specimens of new species (the small sauropodomorph dinosaur Pantydraco caducus and the crocodylomorph Terrestrisuchus gracilis), but no substantial study of the wider fauna of the Pant-y-ffynnon fissure systems has been published. Here, our overview of existing specimens, a few described but mostly undescribed, as well as freshly processed material, provides a comprehensive picture of the Pant-y-ffynnon palaeo-island of the Late Triassic. This was an island with a relatively impoverished fauna dominated by small clevosaurs (rhynchocephalians), including a new species, Clevosaurus cambrica, described here from a partially articulated specimen and isolated bones. The new species has a dental morphology that is intermediate between the Late Triassic Clevosaurus hudsoni, from Cromhall Quarry to the east, and the younger C. convallis from Pant Quarry to the west, suggesting adaptive radiation of clevosaurs in the palaeo-archipelago. The larger reptiles on the palaeo-island do not exceed 1.5?m in length, including a small carnivorous crocodylomorph, Terrestrisuchus, and a possible example of insular dwarfism in the basal dinosaur Pantydraco. 相似文献
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Gilles Serge Odin 《Comptes Rendus Geoscience》2002,334(6):409-414
Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414. 相似文献
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The effect of water on accessory phase solubility in subaluminous and peralkaline granitic melts 总被引：4，自引：0，他引：4
The solubilities of columbite, tantalite, wolframite, rutile, zircon and hafnon were determined as a function of the water contents in peralkaline and subaluminous granite melts. All experiments were conducted at 1035 °C and 2 kbar and the water contents of the melts ranged from nominally dry to approximately 6 wt.% H2O. Accessory phase solubilities are not affected by the water content of the peralkaline melt. By contrast, solubilities are affected by the water content of the subaluminous melt, where the solubilities of all the accessory phases examined increase with the water content of the melt, up to 2 wt.% H2O. At higher water contents, solubilities are nearly constant. It can be concluded that water is not an important control of accessory phase solubility, although the water content will affect diffusivities of components in the melt, thus whether or not accessory phases will be present as restite material. The solubility behaviour in the subaluminous and peralkaline melts supports previous spectroscopic studies, which have observed differences in the coordination of high field strength elements in dry vs. wet subaluminous granitic glasses, but not for peralkaline granitic glasses. Lastly, the fact that wolframite solubility increases with increasing water content in the subaluminous melt suggests that tungsten dissolved as a hexavalent species. 相似文献
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Muriel Rocher Stéphane Baize Stéphane Jaillet Edward Marc Cushing Yannick Lozac&#x;h Francis Lemeille 《Comptes Rendus Geoscience》2003,335(8):701-708
Calcite samples were extracted both from the rock matrix and the superficial coating of a karstified fault plane of an underground quarry, located in the eastern border of the Paris basin. The karstification is dated as Quaternary. Analysis of mechanical calcite twinning reveals that only the calcite matrix has also undergone a compression trending WNW that can be attributed to the Mio-Pliocene alpine collision. Both coating and matrix have undergone a strike-slip regime with σ1 roughly trending north–south, that could correspond to the regional present-day state of stress, a strike-slip compression rather trending NNW, modified by local phenomena. To cite this article: M. Rocher et al., C. R. Geoscience 335 (2003). 相似文献
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正20141520 Bo Ying(Key Laboratory of Metallogeny and Mineral Assessment,MLR,Beijing 100037,China);Liu Chenglin Saline Spring Hydrochemical Characteristics and Indicators for Potassium Exploration in Southwestern and Northern Tarim Basin,Xinjiang(Acta Geoscientica Sinica,ISSN1006-3021,CN11-3474/P,34(5),2013,p.594-602,5 illus.,3 tables,28 refs.) 相似文献
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正20141243Chen Ge(Hangzhou Research Institute of Petroleum Geology,PetroChina,Hangzhou 310023,China);Si Chunsong Study on Sedimentary Numerical Simulation Method of Fan Delta Sand Body(Journal of Geology, 相似文献
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正20142599Chen Sanming(Guangxi Key Laboratory of Concealed Deposits Exploration,Guilin University of Technology,Guilin541004,China);He Yuzhou Block Model and Reserves Estimation of Panzhihua Iron Deposit Based on 3D Geological Modeling(Journal of Guilin University of Technology,ISSN1674-9057,CN45-1375/N,33(4),2013,p.610-615,9illus.,1table,15refs.) 相似文献
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正20140594 Bai Daoyuan(Hunan Institute of Geology Survey,Changsha 410016,China);Zhong Xiang Faults in the Jingzhou Basin and Their Tectonic Settings(Geotectonica et Metallogenia,ISSN1001-1552,CN44-1595/P,37(2),2013,p.173-183,6illus.,59refs.)Key words:basin evolution,tectonic setting,South China In the Upper Paleozoic and Jurassic se- 相似文献
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正20141912Cao Hui(State Key Laboratory for Continental Tectonics and Dynamics,Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China)Gravitational Collapse and Folding during Orogenesis:A Comparative Study of FIA Trends and Fold Axial Plane Traces(Geology in China,ISSN1000-3657,CN11-1167/P,40(6),2013,p.1818-1828,9illus.,35refs.,with 相似文献