广西横县六景地区水文地质特征

广西横县六景地区水文地质分区明显,各区含水岩组富水性差异较大,其中南区含水岩组众多,地下水类型丰富,富水性相对较好;各区地下水补给、径流、排泄条件及动态特征突出;各区地下水水化学特征各异,其中地下水总硬度自北往南,自西往东由低到高变化,以东区最高;南区地下水受污染问题相对严重;区内两组断裂构造的水文地质类型均属构造岩阻...     

复杂构造区向斜盆地岩溶地下水赋存特征及开发利用——以思南县塘坝流域为例

岩溶地下水的赋存受到多种因素控制,特别是在构造复杂区域,岩溶地下水的赋存特征及径流途径就更难确定,这将影响岩溶地下水资源的开发利用。本文通过对铜仁地区思南县许家坝镇塘坝地下河流域进行详细的水文地质调查,以流域岩溶含水系统的隔水边界圈定地下汇水面积,并通过追索地下水径流通道在地表的标志,结合区内复杂地质构造的特点,综合分析得出区内地下水的赋存特点及径流途径。最后通过水文地质钻探验证此类区域贮水构造模式。该结论对今后在向斜构造盆地区域进行地下水资源的勘探和开发具有一定参考价值。     

某铅锌矿矿床涌水量的预测分析

某铅锌矿矿床类型为岩溶堆积型矿床及赋存于石磴子组灰岩中的原生矿床.矿区断裂构造发育,地质构造复杂,矿床水文地质条件复杂,地下水类型有松散岩类孔隙水、基岩裂隙水及岩溶水,其中基岩裂隙水富水性中等,岩溶水富水性丰富,矿床充水条件优越,设计开采深度在岩溶承压水水位以下,水头压力大,矿山开采潜在巷道涌水的危险性大.通过充分分析矿床的水文地质条件,包括地下水类型特征、充水水源及充水途径,并结合抽水试验确定水文地质参数,计算矿床涌水量,为矿山开采设计提水文地质资料.     

宜春岩溶区地下水特征及其开发利用

宜春岩溶区位于萍乡-乐平岩溶发育带上,岩溶地层发育,以岩溶地下水为主要水源。为合理地开发利用岩溶地下水,分析了研究区岩溶地下水分布特征、补径排特征、化学特征、动态特征、储水构造、岩溶地下水开发利用现状、岩溶地下水开发利用区划等。结果表明,宜春地区岩溶含水岩组富水性有丰富、较丰富、中等三种类型,岩溶地下水化学类型以HCO_3-Ca型为主,流量动态曲线以多峰型、单峰型为主。岩溶地下水储集受地层岩性、地貌、构造等因素影响,构造是主导因素,地下水主要储藏于背斜储水构造、向斜储水构造和断裂储水构造。区内地下水开发需因地制宜,分宜(操场、高岚)侵蚀堆积平原区隐伏岩溶含水层多,储水条件好,可直接引流扩泉或井采;中南部多为溶丘谷地、洼地区,工程地质条件复杂,以引水、扩泉、截流为主,井采为次。墨山-田心侵蚀堆积平原区是岩溶塌陷地质灾害的易发和高发区,应限制性开发隐伏岩溶地下水。     

顶峰山矿井地下水化学特征分析

顶峰山矿井地下水系统包含四个子系统:第四系孔隙含水岩组、煤系基岩裂隙含水岩组、栖霞灰岩裂隙—岩溶含水岩组和老窑水。通过对四个子系统地下水化学特征的系统研究,建立了相应的四个含水模型,作为判别矿井突水水源的依据,以指导矿井安全生产。     

顶峰山矿井地下水化学特征分析

顶峰山矿井地下水系统包含四个子系统：第四系孔隙含水岩组、煤系基岩裂隙含水岩组、栖霞灰岩裂隙-岩溶含水岩组和老窑水。通过对四个子系统地下水化学特征的系统研究，建立了相应的四个含水模型，作为判别矿井突水水源的依据，以指导矿井安全生产。     

论岩溶含水层地下水资源评价的概念模型

本文以贵州西部水城岩溶盆地为例,论述了地下水资源开发与工业发展的矛盾。讨论了岩溶含水介质的一些特征并划分其类型模拟含水介质中地下水的运动规律。另外,计算在考到所有输入与输出的情况下岩溶地下水系统内地下水的均衡,试图建立一个能反映该区水文地质条件的岩溶含水层地下水资源评价的概念模型。     

福建永安大湖盆地岩溶地貌双向演化过程及工程地质意义

为探讨大湖岩溶盆地的岩溶特征及地貌演化过程,通过详细的地质测绘、收集到的各类岩溶钻探资料的统计与分析以及地下水样品的水质分析,对区内的岩溶地貌特征、岩溶发育特征、岩溶地下水水质特征进行了系统论述和总结。在此基础上,结合区内岩溶塌陷的调查结果,对研究区岩溶发育的强弱程度进行了分区,并初步提出岩溶塌陷防治方向。研究表明,现今大湖盆地是在海拔340～360 m的高程基础上,经历上覆地层风化剥蚀、下部灰岩溶蚀塌陷的双向地貌演化过程,逐步形成了溶蚀残丘—溶蚀洼地、岩溶管道—暗河式的岩溶发育形态,二者叠置作用共同塑造了区内的地形地貌,并向岩溶准平原方向发展;区域地壳抬升与水文动力条件是大湖盆地岩溶地貌形成演化的两大主控因素;灰岩裸露区和覆盖区为岩溶强烈区,特别是洼地处及断裂带100 m范围内,极易发生岩溶塌陷灾害,埋藏型灰岩区岩溶发育为中等—弱发育区,其对区内场地稳定性影响较弱。在研究区内开展城市建设、工程活动时,应将岩溶洼地、断裂构造发育处等岩溶发育强烈的地区列为岩溶塌陷防治的重点区域。     

利用矿区灰岩疏(放)水资料计算降水入渗系数

本文主要介绍利用矿区内多矿井联合疏(放)岩溶地下水时系统的水动态观测资料,结合区域水文地质条件的分析研究,采用地下水补、排(疏)均衡原理,确定淮南矿区岩溶含水层(组)降水补给量的重要水文地质参数——降水入渗系数(α)。     

顶峰山矿区水文地质特征与防治水措施

 顶峰山矿井地下水系统包括第四系孔隙含水岩组、煤系基岩裂隙含水岩组、栖霞灰岩裂隙-岩溶含水岩组和老空水;矿井充水水源有大气降水、含水岩组、断裂构造带和老窑积水,其中对矿井有突水危险的主要是导水性断层和老窑积水;由于矿井内发育的导水性断层为岩溶水进入煤系提供了通道,防治水的重点工作是探查导水性断层和老窑积水区,导水性断层的探查主要采用高分辨率三维地震勘探和瞬变电磁法相结合的探测方法;防治方法可根据实际情况采用留设防隔水煤（岩）柱、截流堵水、疏水降压和注浆加固等措施;老窑积水主要分布在F5断层以北地区,采取钻探与物探相结合的方法进行探查,主要防治方法为留设防水煤岩柱和探放水。     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.