考虑地球曲率影响的重力中间层校正计算及其精度分析     

张伟  廖国忠  孙涛  张秋冬 《大地测量与地球动力学》2016,36(5):391

介绍一种考虑地球曲率影响的“球冠模型” 重力中间层校正算法,并通过不同算例对比该算法与以往“圆柱体模型”算法之间的差值。结果表明,其差值的数量级最大可达0.4 mGal。  相似文献   

Dynamic process simulation with a Savage-Hutter type model for the intrusion of landslide into river   总被引：1，自引：0，他引：1  

Wei Liu  Si-ming He  Chao-jun OnYang 《山地科学学报》2016,13(7):1265-1274

Natural damming of rivers by mass movements is a very common and potentially dangerous phenomena which has been documented all over the world. In this paper, a two-layer model of Savage-Hutter type is presented to simulate the dynamic procedure for the intrusion of landslide into rivers. The two-layer shallow water system is derived by depth averaging the incompressible Navier-Stokes equations with the hydrostatic assumption. A high order accuracy scheme based on the finite volume method is proposed to solve the presented model equations. Several numerical tests are performed to verify the realiability and feasibility of the proposed model. The numerical results indicate that the proposed method can be competent for simulating the dynamic process of landslide intrusion into the river. The interaction effect between both layers has a significant impact on the landslide movement, water fluctuation and wave propagation.  相似文献   

地下水溶质运移数值法和解析法预测结果对比分析—以沾化电厂为例          下载免费PDF全文

刘志涛  周群道  杨建华 《山东国土资源》2016,32(7)

数值法和解析法是当前解决地下水流和溶质运移问题最常用的两种方法,虽然数值法以其广泛的适用性和较高的仿真性等优点取得了越来越普遍的应用,但解析法也以其简单易用等特点一直成为首选方法之一。该文以沾化电厂地下水环评项目为例,分别采用两种方法对污染物在长期和短期渗漏情况下对地下水所造成的污染情况进行了预测,并在对两种方法预测结果的差异进行分析的基础上,论述了解析法在该区的适宜性,为解析法在该区的应用提供了参考。  相似文献   

青海省祁连县大拉洞柏杨沟矿区煤岩层对比研究          下载免费PDF全文

王立刚  于松  冯园园  赵宝聚  魏伟  王琳琳  薛玉琴 《山东国土资源》2016,32(9)

通过研究太原组的沉积特征及聚煤变化规律,采用了标志层、煤岩层组合特征、层间距、测井曲线形态等方法,对矿区内煤层、岩层进行了综合对比。确定了该区主要煤层的赋存层位、形态、分布及变化特征,对周边地区找煤工作具有一定的指导作用。  相似文献   

Antialgal and antilarval activities of bioactive compounds extracted from the marine dinoflagellate <Emphasis Type="Italic">Amphidinium carterae</Emphasis>     

Xianyu Kong  Xiurong Han  Min Gao  Rongguo Su  Ke Wang  Xuzhao Li  Wei Lu 《中国海洋大学学报(英文版)》2016,15(6):1014-1020

With the global ban on the application of organotin-based marine coatings by the International Maritime Organization, the development of environmentally friendly, low-toxic and nontoxic antifouling compounds for marine industries has become an urgent need. Marine microorganisms have been considered as a potential source of natural antifoulants. In this study, the antifouling potential of marine dinoflagellate Amphidinium carterae, the toxic and red-tide microalgae, was investigated. We performed a series of operations to extract the bioactive substances from Amphidinium carterae and tested their antialgal and antilarval activities. The crude extract of Amphidinium carterae showed significant antialgal activity and the EC₅₀ value against Skeletonema costatum was 55.4 μg mL^?1. After purification, the isolated bioactive substances (the organic extract C) exhibited much higher antialgal and antilarval activities with EC₅₀ of 12.9 μg mL^?1 against Skeletonema costatum and LC₅₀ of 15.1 μg mL^?1 against Amphibalanus amphitrite larvae. Subsequently, IR, Q-TOFMS, and GC-MS were utilized for the structural elucidation of the bioactive compounds, and a series of unsaturated and saturated 16- to 22-carbon fatty acids were detected. The data suggested the bioactive compounds isolated from Amphidinium carterae exhibited a significant inhibiting effect against the diatom Skeletonema costatum and Amphibalanus amphitrite larvae, and could be substitutes for persistent, toxic antifouling compounds.  相似文献   

The Impact of Large-Scale Reclamation on Hydro-Dynamic Environment——A Case Study of Xinghua Bay     

YU Jing  BAO Xianwen  DING Yang  ZHANG Wei  ZHOU Lingling 《中国海洋大学学报(英文版)》2016,15(4):583-592

A hydro-dynamic model is established on basis of MIKE21 FM to simulate the hydro-dynamic characteristics of Xinghua Bay and investigate the influence of reclamation project on the tidal elevation and tidal currents. Tidal elevation data was obtained at the six tide gauge stations around the Xinghua Bay, and another six current stations were established to observe the tidal current velocity and direction. Validation shows that the model-simulated tidal elevation and tidal currents agree well with observations made at different stations. Predictions are made according to the reclamation project proposed in the regional marine planning of Hanjiang Industrial Park around the port in Putian City. The variations of hydro-dynamic factors, such as tide, current velocity and direction and tidal influx are obtained, and the adverse effect of reclamation on marine environment is discussed. It is shown that the tidal level inside the Xinghua Bay during high tide decreases after the reclamation project is completed. The tidal currents during flooding tide generally decrease in the southeast of the reclamation region, with the maximum decreasing amplitude reaching 0.44 m s^-1. On the other hand, the tidal currents during flooding tide increase around the southeast and southwest corners of the reclamation region. The tidal currents during ebb tide increase around the southeast and southwest corners of the reclamation region, with the maximum increasing amplitude attaining 0.18 m s^-1. The results in this paper can give some guidance for the marine environment management and the effective utilization of land in Putian.  相似文献   

玲珑金矿西山幔源脉岩地球化学特征          下载免费PDF全文

孙雨沁  马晓东  程伟  张岩  李敏 《山东国土资源》2016,32(2)

玲珑西山幔源脉岩主微量元素的变化暗示了源岩很可能经历过类似俯冲带流体的交代作用,矿化流体中含有较高含量的金属矿物,具有Eu的正异常,指示了源区是深源的。脉岩中的CO2来源可能是花岗岩岩浆热液的混入,石英来源于陆壳碎屑物质部分熔融形成的S型花岗岩,硫的来源与幔源脉岩岩浆同源,或来自地幔,或来自地壳深部。  相似文献   

频谱分解技术在泥页岩储层含气性预测中的应用——以柴达木盆地鱼卡凹陷为例     

徐秋枫  陈建文  姚泉  周志  王胜建 《地质通报》2016,35(203):348-355

针对柴达木盆地北缘鱼卡凹陷中侏罗统大煤沟组泥页岩,利用地震频谱曲线在不同流体介质储层中的形态、斜率、主频与中心频率的差值等属性参数特征,识别陆相泥页岩层系的地震频谱属性特征,预测含气性。研究结果表明,中侏罗统大煤沟组上部能量系数较低,平均为0.6719,下部能量系数较高,平均为0.7521,结合现场含气量和全烃特征认为,可以以能量系数0.7为界线,作为识别下部和上部含气性的标志,下部明显比上部含气性好。平面上进一步圈定了2个有利目标区,得到柴页1井勘探验证。因此,频谱分解技术可应用于中国陆相页岩气的勘查开发。  相似文献   

柴达木盆地北缘侏罗系页岩气地质条件   总被引：1，自引：1，他引：0  

任收麦  包书景  张毅  潘洪峰  郭天旭  周志 《地质通报》2016,35(203):204-210

侏罗系泥页岩是柴达木盆地的主力烃源岩之一,具备形成页岩油气的地质条件。对采自柴北缘鱼卡、大煤沟、小煤沟、开源、绿草沟、大头羊等煤矿附近地表露头的11块中侏罗统泥页岩样品进行单样品多参数实验分析,探讨了陆相页岩有机地化、储层物性、含气量等参数之间的关系,建立了页岩气资源评价参数体系。结果表明,柴达木盆地北缘中侏罗世处于浅湖-半深湖湖相沉积,断裂较发育,泥页岩富含有机质,具有低孔、低渗、低熟、较高含气量等特点,具备形成页岩油气的地质条件,进一步的勘查开发需优选地层压力系数高、保存条件较好、脆性矿物含量高的页岩气甜点区。  相似文献   

基于多元对应分析的国家地质公园综合价值及分类   总被引：1，自引：0，他引：1  

刘佳  姚华军  高伟  冯春涛  李闵 《地质通报》2016,35(5):842-849

目前地质公园的分类难以针对具有多重价值属性的各类地质公园提出行之有效的分类管理模式。提出基于综合价值的国家地质公园分类模式,建立了国家地质公园综合价值评价指标,通过问卷调查与小组讨论获取了35个国家地质公园的量化综合价值评价指标数据,应用多元对应分析对量化数据进行统计处理,最后将35个国家地质公园分为禀赋型地质公园、生态型地质公园、成熟型地质公园、均衡型地质公园和发展型地质公园五大类,为国家地质公园分类管理提供依据。  相似文献