地质资料信息集群化共享服务平台关键技术研究   总被引：2，自引：0，他引：2  

贾文珏  周舟 《国土资源信息化》2012,(5):19-22

地质资料是地质工作形成的重要基础信息资源,是国民经济和社会发展的重要信息支撑。国土资源部非常重视地质资料的开发利用和共享服务,将地质资料信息集群化产业化列为部重点工作之一。但是,地质资料分散保管、服务的现状为全国统一集群化服务的实现出了一道难题,现有的数据集中服务方式难以实现,为此,本文在深入调研和技术研究的基础上,提出了“数据分散存储、服务逻辑统一”的分布式地质资料集群化共享服务构架,攻克了分布式协同的技术难题,成功实现了地质资料信息的集群化服务。这套技术可以扩展到其它分布式存储管理的各类国土资源数据领域,将有效提升国土资源信息集群化服务能力。  相似文献   

Middle Triassic (Anisian-Ladinian) Tejra red beds and Late Triassic (Carnian) carbonate sedimentary records of southern Tunisia,Saharan Platform: Biostratigraphy,sedimentology and implication on regional stratigraphic correlations     

《Marine and Petroleum Geology》2017

The “red beds” of the Triassic succession outcropping at Tejra-Medenine (southern Tunisia, Saharan Platform) have yielded rich fossil assemblages of both freshwater and brackish-marine invertebrates and vertebrates. The new discovered fauna indicates an Anisian-Lower Ladinian age for the Tejra section. Its lowermost part is considered as equivalent of Ouled Chebbi Formation, while the medium and upper parts are considered as equivalent of the Kirchaou Formation. Both sedimentological characteristics and fossil assemblages indicate the increasing marine influences within the middle part of the section and the migration of brackish and freshwater fauna into the lacustrine/playa environment at the top. The marine fauna-rich interval of the Tejra section correlates well with the well-known Myophoria-rich carbonate stratigraphic marker confirming the Middle Triassic (Ladinian) major transgression well recorded eastward in the Tunisian Jeffara basin and in Libya. The use of this Ladinian stratigraphic event in addition to the Carnian carbonate transgressive events of the Jeffara escarpment outcrops was of great help for regional lithostratigraphic correlations between the Triassic outcropping series and those currently buried in Ghadames and Berkine basins. The age of the sandstones of “Trias Argilo-Gréseux Inférieur” (TAGI) which forms the main oil and gas reservoir in the Saharan domain is attributed to the Anisian-Carnian and considered as coeval of Ouled Chebbi and Kirchaou Formations of the Dahar escarpment. An updated synthetic stratigraphic chart is proposed for the Triassic of Saharan Platform domain on the basis of the compilation of the new obtained results and the subsurface data taken from published literature.  相似文献   

华北地台东北缘寒武系芙蓉统叠层石生物丘中的钙化蓝细菌   总被引：5，自引：0，他引：5  

梅冥相  张瑞  李屹尧  接雷 《岩石学报》2017,33(4):1073-1093

华北地台东北缘的芙蓉统,大致为长山组和凤山组所组成,可以进一步划分为3个三级沉积层序;层序划分主要基于沉积相序列的旋回性所代表的沉积趋势,较深水的陆棚相钙质泥岩和深缓坡相条带状泥晶灰岩和泥灰岩组成的凝缩作用序列、与高水位体系域和强迫型海退体系域的中至浅缓坡相碳酸盐岩组成的总体向上变浅序列,是这些三级沉积层序的基本构成,从而形成了较为典型的淹没不整合型层序。那些典型的叠层石生物丘,类似于微生物礁,主要发育在长山组和凤山组下部构成的三级层序的强迫型海退体系域之中,代表了缓坡型台地中相对海平面下降阶段的沉积记录。这些叠层石生物丘中的叠层石,泥晶和微亮晶是其基本构成,最为特征的是发育着一些典型的钙化蓝细菌化石,表明了这些寒武纪芙蓉世的叠层石生长于蓝细菌主导的微生物席的钙化作用之中。最为重要的是,在构成叠层石生物丘的粗糙纹层柱状和穹窿状叠层石中,较为普遍地发育着"石松藻(Lithocodium)";这种谜一样的钙化蓝细菌化石,与其他的钙化蓝细菌化石一起,表明了寒武纪叠层石形成过程中复杂的微生物沉淀作用,成为窥视叠层石生长和石化过程中重要的微生物作用信号。就像其名称所蕴含着的高级绿藻中的松藻(Codium)的涵义一样,"石松藻(Lithocodium)"状的钙化蓝细菌,多描述于中生代的微生物碳酸盐岩中,而且还常常被解释为结壳状有孔虫或"海绵骨针的网状物",其生物亲和性还存在着剧烈的争论。因此,华北地台东北缘寒武系芙蓉统中的叠层石生物丘,特殊的层序地层位置代表了较为典型的强迫型海退沉积记录,特别的钙化微生物构成代表着叠层石生长和石化过程中复杂的微生物作用信号,成为深入了解"寒武纪-早奥陶世微生物碳酸盐岩复苏期"和"显生宙早期第一幕蓝细菌钙化作用事件"中的微生物造礁和成丘作用的典型实例。  相似文献   

The Relationship between the Distribution of Thick Coal Belts and the Late Carboniferous-Early Early Permian Marine Transgression-Regression in the North China Platform     

ZHONG Rong  Institute of Geomechanics  CAGS  Beijing  FU Zeming China University of Geosciences  Beijing Zhou Jian Liu Xinzhu 《《地质学报》英文版》1998,72(1):114-120

Four great second-order transgressions occurred during the Late Carboniferous to early Early Permian and they came from both the eastern and western sea areas in the North China Platform. As time went on, depocentres, depositional extent, transgression directions, coastline position and distribution of minable coal seams were changing continuously. The third great second-order transgression occurring at the beginning of the early Early Permian marks the maximum transgression period and before its arrival, i.e. at the close of the late Late Carboniferous, there was the super-regional coal-forming environment. During the second, third and fourth transgressions, the northern North China Platform was all along situated on the transgressive margin of the epicontinental sea and became the major distribution area of thick coal belts because it maintained a coal-forming environment for a long period of time from the close of the late Late Carboniferous to the Early Permian.  相似文献   

Nearshore wave environments around a sandy cay on a platform reef,Torres Strait,Australia     

Bongkoch Samosorn  Colin D. Woodroffe 《Continental Shelf Research》2008

Waves are the primary factor affecting reef-island morphology. This study examines spatial and temporal variations of wave characteristics in the nearshore around Warraber Island, a sandy cay on a platform reef in Torres Strait Australia, based on field measurements during the predominant southeasterly wind season. Water pressure was recorded simultaneously, and transformed to water surface wave spectra, at a location close to the reef edge and across the nearshore at different locations around the island. Wave environments off the reef were estimated based on wave characteristics measured at the reef-edge location and found to be primarily dominated by sea. Low and high wave-energy events were identified, based on wave energy level at the reef-edge location.  相似文献   

WMN技术用于构建新型地震应急救援无线通讯平台的分析与设想   总被引：2，自引：1，他引：1  

祝恒书  宋立军  赵雯佳 《内陆地震》2008,22(3):226-233

传统的WLAN（Wireless LAN无线局域网）因为其单跳的网络特性造成了通讯瓶颈,这也使得其不能很好地满足地震应急救援通讯对效率、准确、安全等特性的要求。一种新型的无线网络形式WMN（Wireless Mesh Network无线网状网）的出现为构建下一代地震应急救援无线通讯系统提供了良好的网络基础。通过对传统地震应急救援无线平台和WMN的介绍,分析了构建新型地震应急救援无线通讯平台的技术指标和可行性,并且给出了平台搭建建议,最后对可能存在的问题以及应用前景进行了讨论。  相似文献   

华北地台类的演化与煤层生成   总被引：2，自引：0，他引：2  

汪增荫  尚冠雄  毛邦倬 《地学前缘》1999,6(Z1):73-79

以华北地台59处创面全涵盖式研究为基础,建立了华北石炭、二叠纪类生物群演化系列,并划分为6带13亚带,从中抽取4个与煤层生成关系密切的阶段加以详细讨论,分别称为：（1）Pr阶段;（2）T阶段;（3）Ps阶段和（4）S阶段。其中第1阶段反映煤盆地的构造启动,另外3个阶段分别代表太原组底部厚煤层、山西组主煤层、南华北区大风口组煤层的生成机制。  相似文献   

Information theory measures for the engineering validation of ground‐motion simulations     

《地震工程与结构动力学》2018,47(4):1095-1104

This short communication introduces a quantitative approach for the engineering validation of ground‐motion simulations based on information theory concepts and statistical hypothesis testing. Specifically, we use the Kullback‐Leibler divergence to measure the similarity of the probability distributions of recorded and simulated ground‐motion intensity measures (IMs). We demonstrate the application of the proposed validation approach to ground‐motion simulations computed by using a variety of methods, including Graves and Pitarka hybrid broadband, the deterministic composite source model, and a stochastic white noise finite‐fault model. Ground‐motion IMs, acting as proxies for the (nonlinear) seismic response of more complex engineered systems, are considered herein to validate the considered ground‐motion simulation methods. The list of considered IMs includes both spectral‐shape and duration‐related proxies, shown to be the optimal IMs in several probabilistic seismic demand models of different structural types, within the framework of performance‐based earthquake engineering. The proposed validation exercise (1) can highlight the similarities and differences between simulated and recorded ground motions for a given simulation method and/or (2) allow the ranking of the performance of alternative simulation methods. The similarities between records and simulations should provide confidence in using the simulation method for engineering applications, while the discrepancies should help in improving the tested method for the generation of synthetic records.  相似文献   

岩浆隐爆作用与金矿化的关系——以华北地台北缘金矿为例   总被引：2，自引：0，他引：2  

李俊建  沈保丰  曹秀兰  翟安民 《地质论评》1999,45(7):517-519

以中元古代碎屑岩—碳酸盐岩为容矿岩石的浸染型金矿床是近年来发现的金矿新类型。 本文简要介绍了该类金矿床的地质特征、矿床类型和成矿模式。 提出华北地台北缘该类金矿的成矿作用与岩浆隐爆作用密切相关。  相似文献   

Multi-component seismic response analysis of offshore platform by wavelet energy principle     

Hong-Nan Li  Xiao-Yu He  Ting-Hua Yi 《Coastal Engineering》2009

A wavelet energy method is presented to search the critical incidence of earthquake excitation in a multi-dimensional seismic response of offshore platforms. The total effective energy and the instantaneous effective energy input rate of an earthquake can be obtained by wavelet transformation to predict the critical incidence of the earthquake and then the maximum dynamic response of the platform can be calculated. The critical incidence is determined using this method for an actual platform and a group of single degree-of-freedom systems. Numerical results show that the application of wavelet transform in a multi-dimensional seismic response of structures is convenient and reliable.  相似文献