黔西县马鬃岭井田煤层特征对比及其意义

黔西县是贵州省主要的产煤区之一。根据贵州省黔西县马鬃岭井田普查所获地质成果资料,经过系统统计分析,建立了标志层B1~B5,通过该区标志层B1~B5地质特征、地球物理特征及煤层特征的对比分析,阐明了含煤岩系煤层对比划分的方法和特点,指出了黔西县马鬃岭井田煤层、标志层特征对比的意义和作用。     

煤质特征在煤层对比中的应用

煤层对比是煤炭勘查的基础工作内容,可靠的煤层对比是评价煤炭资源的先决条件。煤中硫含量及其变化反映了成煤环境自身特征,煤层对比过程中,通过硫分特征研究,可以有效解决对比的多解性,提高煤层对比可靠程度。本文以贵州省织金县MJT煤矿为例,说明在多煤层地区,通过对煤层原煤硫分变化,校正煤层对比结果,提高煤层对比可靠程度的方法。     

山西省屯留县文王山地垒中煤炭赋存特征

通过对山西省屯留县文王山地垒中的煤炭普查,初步查明了该区含煤地层、含煤性、可采煤层层位、厚度和分布范围,大致确定了可采煤层煤类和煤质特征。估算出该区333+334?煤炭保有资源量5.6亿t,为一大型煤炭矿床。     

新安煤田中部煤岩层对比的研究

分析了主要含煤层段二叠系山西组和上、下石盒子组的岩性组合特征及主要可采煤层二 1 煤对比标志和局部可采煤层 ,二 2 煤、七 2 煤的对比标志 ,确定了煤层对比的主要方法为标志层法 ,层间距法 ,煤质特征分析法和物性法。     

巴基斯坦塔尔煤田Ⅰ区块含煤性及煤岩层对比研究

根据塔尔煤田Ⅰ区块构造单一,地层产状平缓的地质特点,利用钻探、物探测井及化验等多项成果,采用标志层法、煤层间距法、煤岩煤质法以及地球物理测井法等煤岩层对比方法,对塔尔煤田Ⅰ区块岩层,特别是含煤地层进行了综合对比分析,划分出第四系、新近系和古近系地层界面,并将区内煤层划分为5个煤炭组,9个分煤层,成果可靠。     

金三角勘查区煤层对比可靠性分析

为了确定金三角勘查区煤层的对比,本文依据区内可采煤层的厚度、结构、层间距及组合特征、特殊标志层,采用地质剖面连线法结合煤层的物性反映相互验证的综合对比方法,对区内煤层的对比可靠性进行分析。     

新安煤田中部煤岩层对比的研究

分析了主要含煤层段二叠系山西组和上、下石盒子组的岩性组合特征及主要可采煤层二，煤对比标志和局部可采煤层，二2煤、七2煤的时比标志，确定了煤层时比的主要方法为标志层法，层间距法，煤质特征分析法和物性法。     

新疆拜城县阿依冬可档矿区的煤层对比

新疆拜城县阿依冬可档矿区的煤层对比，综合运用了标志层、沉积旋回，煤层间距、煤层特征等对比方法，准确识别煤层，取得准确的地质资料。     

吉日嘎郎露天煤矿煤层对比

采用特厚煤层标志层、煤层结构组合特征、岩性特征、测井曲线特征等多种方法,对吉日嘎郎露天煤矿岩煤层进行对比分析,认为该煤系含煤层段沉积稳定,煤层组合特征明显,岩性变化有一定规律性,易于辨认及对比。     

潮水盆地芦草台子地区煤层对比研究

芦草台子勘查区处于甘肃河西缺煤地区,勘查区紧邻平山湖含煤区,属于平山湖矿区总体规划范围之内.但该区煤层多,煤层有分叉突变现象,岩煤层对比难度大.本次通过分析该区地层特征、煤层特征、构造特征,运用全区发育稳定的中侏罗统下岩组顶界的灰黑色粉砂岩或泥岩作为K1标志层;运用地球物理测井曲线上煤层均表现为低密度、高电阻、低自然伽玛和声速高异常的特征,各可采煤层测井物性特征不同等对比方法,结合邻区平山湖含煤区对比资料综合分析研究,对该勘查区内各可采煤层详细对比,确定了各可采煤层的空间位置,为报告编制和矿井建设提供了依据.     

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.     

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.     

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).     

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.