探地雷达探测地下管线机理研究及实例分析

探地雷达是一种适应快速、准确探测地下障碍物而迅速发展的新型电磁仪器。探讨了探地雷达探测地下管线的机理,得出了走时曲线方程,并通过对探测实例详细地分析亦探讨了复杂条件下探地雷达资料采集和图像解释的方法,介绍了一维滤波、偏移回归、时深转换等数据处理方法和经验,验证了该方法的可行性,表明该技术具有良好地应用前景。     

云南思茅-南坪盆地边缘造山带金(铜)成矿流体动力学

从研究云南思茅-南坪盆地边缘造山带金(铜) 成矿流体的地质地球化学特征和物理化学条件入手, 通过氢-氧、碳-氧、氦-氩同位素组成示踪和矿物流体包裹体温度-压力、流体成分测试及物理化学参数计算, 认为成矿溶液主要来自大气降水, 并且成矿物质具有壳源的特点, 不能排除构造/岩浆活动中其他壳源流体加入的可能性, 其性状为浅成(低压)、低温、高盐度、弱碱性和弱还原性, 流体组分别具有Na+ > K+和Ca2+ +Mg2+、Cl- > F-的特点, 还原形式存在的硫占绝对优势, 它对金的迁移和沉淀起着关键的作用; 运用古水文地质学方法模拟成矿流体的水动力场与排泄条件, 强调多成因含矿流体受古水文动力场运移、分布形式制约, 高能量、高矿化度成矿流体经历漫长的地下反复溶滤、渗透、岩浆和构造驱动双重作用下, 在水动力低压区排泄、沉淀富集成矿.      

同位素测定在辽河油田宋家洼陷构造演化分析中的应用

辽河油田尖1井335~2050m之间为1715m厚的火山岩,此套火山岩在该地区其他井的相当层位和深度都没有出现,它的归属和该区的地层对比就成了揭开此区构造面貌的关键.通过火山岩的同位素分析,综合运用其他相关资料,确定了尖1井火山岩的年代,进行了层序演化和构造演化分析.从而确定了该研究区的地层层序和构造演化特征,分析了有利油气区的分布,为深入研究和确定勘探目标提供了依据.     

一种地理空间数据即服务私有云设计

首先分析了大数据时代地理信息服务存在的问题,介绍了数据即服务的发展现状。然后提出了一种地理空间数据即服务私有云,并设计了其逻辑结构和功能结构。最后,介绍了三种支撑私有云的关键技术。     

测高数据不准时的直升机航空瞬变电磁一维反演方法理论研究

航空电磁勘探中,高度计显示的发射线圈高度数据往往是不准确的,这可能会影响反演结果,出现假异常现象。针对这一情况,提出了一种高度计数据不准确条件下的航空瞬变电磁资料一维反演方法,在重构地电参数的同时也对发射线圈高度值进行校正。由于航空电磁反演问题是典型的病态问题,使用正则化反演方法,正则化因子由数据目标函数与模型目标函数之间的关系以自适应方式给出,使得反演迭代能稳定进行。以直升机航空瞬变电磁资料反演为例,用理论模型响应数据加入噪声进行反演,结果表明,无论初始高度值是高于真值还是低于真值,该反演方法均能够较好地重构地下介质参数和发射线圈高度值;作为反演初值的发射线圈高度测量值越准确时,反演迭代收敛速度就越快,反演效果也越好。     

An annual cycle of recruitment,growth and production in a Malaysian population of the trochacean gastropod Umbonium vestiarium (L.)

From July 1981 to July 1982 Umbonium vestiarium (L.) on a north Penang sand shore numbered 573–11 077 m^?2 (mean 4126 or 53·1 g dry tissue) near MLWN and 2164–12 414 m^?2 (mean 6500 or 59·8 g dry tissue) further downshore. Heavy recruitment of young became evident in June and July 1982 and a closely corresponding cohort of young was present in July 1981. Progression of this cohort indicated that young settling in May–June grew to full size (11–13 mm diameter) by January–March the following year and that virtually all died during their second year, presumably having spawned in March–May. Recruitment of young was chiefly on the lower shore but adults came to be more abundant and predominant on the upper shore. There is some evidence of migration upshore during growth.Production is estimated at 105·4 g dry tissue m^?2 y^?1 (2118 kj) at the lower shore level and this is almost double the 58·8 g m^?2 y^?1 (1176·6 kj) at the higher level. These values represent almost the entire secondary production across much of the sand flats.Possible causes of such a marked annual cycle in the very weakly seasonal tropics of the Malacca Strait are considered and it is suggested that monsoonal changes in wind, wave action and salinity might be involved.     

浙闽赣区域似大地水准面精化

本文介绍了国家测绘局在浙闽赣三省精化区域似大地水准面试点项目中所采用的技术路线和方法。论述了为满足项目精度目标,对GPS和水准路线布测和观测精度要求,以及GPS、水准数据处理和区域似大地水准面确定所采用的方案。分析了似大地水准面精化成果的精度,评述了该项成果应用的前景。     

A Critical Review on Filter Design Criteria for Dispersive Base Soils

Dispersive soils have become common materials for the construction industry. Highly susceptible to internal erosion and piping, dispersive soils must only be used with specific engineering measure in order to avoid failures that were often catastrophic. In an earth dam, clayey soils are used for the core and sandy materials are used for the filter to retain the eroded core soils and prevent their migration. In the absence of first-rate core material, dispersive soils have been used instead. This paper provides a review of the current knowledge and experiences regarding filtration of core soils, particularly the dispersive ones. The engineering problems associated with the use of dispersive soils are discussed and significant findings from previous studies on protective filters are summarized. It is worthy to note that the current review considers both, the conventional, rather empirical filter design criteria based on particle sizes and the current, quite theoretical state-of-the-art filter design criteria based on constriction sizes, with discussion given on the advantages and disadvantages of both. The information provided by this review should be handy for the study, design, construction, and operation of related geotechnical and geo-environmental projects.     

基于DWZ和SSH的煤层气地面集输地理信息系统的设计与实现

根据煤层气管理信息化的要求,设计并实现了基于DWZ富客户端框架和SSH三层架构的B/S模式的煤层气地面集输地理信息系统。文中介绍了DWZ和SSH框架的优点,分析了系统的功能模块,并以系统登录为例阐述了DWZ和SSH在系统中的应用。实践表明,该系统提高了煤层气田的工作效率,实现对煤层气田矿井、生产数据、生产设备、报表和用户的信息化、网络化管理。     

Preliminary Study on Relationship between Gravitational Field Change Caused by Oilfieid Water Flooding and Seismicity in Puyang Area

收集了1995-2007年中原油田濮阳地区各油田的注水开采等质量迁移资料,利用图示法研究发现油田注水与区域地震活动之间存在一定联系,并定量计算了油田注水引起的重力变化量.结合重力复测资料对油田注水引起的重力场变化和该地区地震之间的关系进行了初步研究,其注采作业引起的重力场变化在土0.1～10×10-8m·s-2之间,并随着油田中心区域的距离而衰减.