淹没不整合型层序——一种特殊的加深淹没   总被引：1，自引：0，他引：1  

符颖  韩林 《海相油气地质》2007,12(3):15-20

淹没不整合型层序以其凝缩层直接覆盖于层序界面上,即凝缩层+高水位体系域层序类型为特征,以不含有任何暴露证据而区别于层序地层学定义的Ⅰ型和Ⅱ型层序界面,成为碳酸盐地层层序中的一种特殊类型的三级旋回层序界面。以淹没不整合型层序的特征描述、鉴别方法和实例分析阐述了淹没不整合是一种旋回层序的特殊类型即加深淹没型层序界面。这种淹没不整合型层序在油气运移方面起着重要作用。  相似文献   

海水冷冻预淡化系统的试验研究     

孙朋元  袁瀚  张继  孙坤元  庞海林 《中国海洋大学学报(自然科学版)》2021,51(3)

本文提出了一种基于冷冻脱盐的海水双级冷冻预淡化系统。该系统利用蒸发结晶器对海水进行冷冻,并通过振动分离与洗涤实现冰晶与卤水的分离,以此实现海水的初步脱盐,可作为反渗透淡化的预处理系统。同时,海水冷冻淡化过程中消耗的冷量可重新回收用于空调制冷,淡化成本得以有效降低。本文建立了海水双级冷冻预淡化系统的数学模型,获得了试验系统的关键设计参数,以此搭建了试验平台并完成了试验测试,并对海水双级冷冻预淡化系统进行了经济性分析。试验结果表明:经过海水冷冻预淡化系统,预淡化海水产量可维持在21~27 L/h之间;预淡化海水盐度可从35降低到约11;预淡化过程可回收总冷量7.91 kW;反渗透淡化总成本可降低约33%。  相似文献   

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党星海  赵丽洁  孔令杰  韩博 《大地测量与地球动力学》2013,33(2):147-150

?????????????????????GPS ??????????????Ч???????????????GPS?????????????в???С???????????????????????????Ч?????????????????????????????  相似文献   

冀西安妥岭斑岩型钼矿成矿地质条件浅析   总被引：1，自引：0，他引：1  

李会恺  乔增宝  韩亮  鹿波  赵体群 《山东国土资源》2009,25(9):20-25

安妥岭钼矿位于燕辽钼（铜）成矿带南端,与附近的野弧斑岩型钼矿等具有相同的地质背景和成矿条件。文章阐述了古结晶基底、中生代岩体以及NNE、NW和近EW向构造与成矿的关系,提出安妥岭钼矿是在斑岩型矿床基础上,叠加了主要沿NW向构造发育的岩浆热液成矿作用所形成的具有复杂成矿系列的非典型斑岩钼矿床。  相似文献   

广州市制造业与生产性服务业协同集聚与空间相似性   总被引：1，自引：1，他引：0  

钟韵  赵蓓蕾  李寒 《地理科学》2021,41(3):437-445

基于企业微观大数据,从空间相似性的视角,运用核密度法、双变量空间自相关法和地理探测器等分析方法,对广州市6个制造行业和5个生产性服务行业的空间协同关系展开分析,在街镇尺度下从行业层面探讨生产性服务业与制造业在城市内部的协同集聚.研究发现:行业集聚中心的空间布局形态显示,广州的制造业与生产性服务业布局具有空间相似性.制造...  相似文献   

大型建筑设施物联网应用的探索     

张涵  易志辉  陈晓勇  徐超 《地理信息世界》2021,28(1):85-89

经过近30年的发展,我国桥梁健康监测系统研究与应用取得了可喜的进步,越来越多的大型桥梁开展自动化监测系统建设工作.然而目前部分监测系统均存在着重硬件、重单体、监测精度低等问题.本文结合国内外研究现状,在现有监测体系的基础上,构建了多因子、多维度桥梁健康监测体系,并提出了一种结合5G网络技术的集自动监测、巡检、养护、管理、预警和决策指挥于一体的桥梁健康系统,实现桥梁振动、位移、山体滑坡和地震等突发事件的实时报警,提供专家库一键式解决方案.  相似文献   

Development of a GPGPU-parallelized hybrid finite-discrete element method for modeling rock fracture     

Daisuke Fukuda  Mojtaba Mohammadnejad  Hongyuan Liu  Sevda Dehkhoda  Andrew Chan  Sang-Ho Cho  Gyeong-Jo Min  Haoyu Han  Jun-ichi Kodama  Yoshiaki Fujii 《国际地质力学数值与分析法杂志》2019,43(10):1797-1824

The hybrid finite-discrete element method (FDEM) is widely used for engineering applications, which, however, is computationally expensive and needs further development, especially when rock fracture process is modeled. This study aims to further develop a sequential hybrid FDEM code formerly proposed by the authors and parallelize it using compute unified device architecture (CUDA) C/C++ on the basis of a general-purpose graphics processing unit (GPGPU) for rock engineering applications. Because the contact detection algorithm in the sequential code is not suitable for GPGPU parallelization, a different contact detection algorithm is implemented in the GPGPU-parallelized hybrid FDEM. Moreover, a number of new features are implemented in the hybrid FDEM code, including the local damping technique for efficient geostatic stress analysis, contact damping, contact friction, and the absorbing boundary. Then, a number of simulations with both quasi-static and dynamic loading conditions are conducted using the GPGPU-parallelized hybrid FDEM, and the obtained results are compared both quantitatively and qualitatively with those from either theoretical analysis or the literature to calibrate the implementations. Finally, the speed-up performance of the hybrid FDEM is discussed in terms of its performance on various GPGPU accelerators and a comparison with the sequential code, which reveals that the GPGPU-parallelized hybrid FDEM can run more than 128 times faster than the sequential code if it is run on appropriate GPGPU accelerators, such as the Quadro GP100. It is concluded that the GPGPU-parallelized hybrid FDEM developed in this study is a valuable and powerful numerical tool for rock engineering applications.  相似文献   

太子河流域山西组海相动物化石新材料及其意义     

范国清  王洪战  丁杰  韩永昌 《国土资源》1988,(3)

山西组广泛分布于辽东太子河流域。笔者在本溪田师付山西组采得Chonetes carbonifera等海相动物化石。这些化石新材料对于研究山西组的时代, 石炭—二叠系的界线,以及与山西、河南、河北、山东和安徽等地的地层对比,沉积演化及晚石炭世海浸的方向、期次、范围等均具重要意义。  相似文献   

对梧州地区开发利用铁矿资源的建议     

黄汉 《南方国土资源》1996,(4)

文章根据我区铁矿原料供给紧张的情况及梧州地区铁矿资源赋存的特点，从开发利用现状分析存在问题，提出搞好资源开发与管理的几点建议  相似文献   

Ca ii H2v and K2v cell grains     

J. Rutten Robert  Han Uitenbroek 《Solar physics》1991,134(1):15-71

The bright Ca ii H_2v and K_2v grains, which are intermittently present in the interiors of network cells in quiet-Sun areas, should provide important diagnostics of the dynamical interaction between the quiet photosphere and the chromosphere above it, but their nature has so far eluded identification. We review the extensive observational literature on these grains and on related phenomena. We resolve various contradictions, connect hitherto unconnected observations, distill new constraints and relate signatures in the measurement domain to signatures in the Fourier domain. We then review interpretations and simulation efforts, adding computations of our own to illustrate modeling options. We conclude that the grains are a hydrodynamical phenomenon in which magnetic fields do not play a major role. The grains are due to interference between a pervasive standing oscillation with about a 180 s periodicity and an 8 Mm horizontal wavelength in the chromosphere and the wave trains of the evanescent p-mode interference pattern in the upper photosphere. The roles of short-period waves, shock formation and granular piston excitation and the issue of long-lived patterning remain open; we suggest avenues for further research.  相似文献