Reissner-Nordstrm de Sitter黑洞的电磁粒子隧穿辐射

在Reissner-Nordstrm de Sitter黑洞时空背景下,采用Parikh-Wilczek半经典隧穿方法,计算了带有电荷和磁荷的静质量非零粒子在黑洞视界面上的隧穿率.结果表明,黑洞事件视界和宇宙视界处粒子的隧穿率与Bekenstein-Hawking熵有关,真实的辐射谱不再是严格的纯热谱,但这是对Hawking纯热谱的正确修正,结果满足量子理论的幺正性定理.     

Gibbons—Maeda Dilation黑洞的量子隧穿效应

运用Parikh的量子隧穿方法，研究了静态球对称Gibbons—Maeda dilation黑洞的量子隧穿效应．当考虑粒子的自引力作用和能量守恒时，Gibbons—Maeda dilation黑洞视界处的粒子隧穿率与Bekenstein—Hawking熵有关，黑洞真实的辐射谱不再是严格的纯热谱．本文所得隧穿率在特殊情况下与Schwarzschild黑洞的结果一致，在忽略ω的高次方项的条件下，可以得到Gibbons—Maeda dilation黑洞辐射的纯热谱．     

Atorus-like黑洞的隧穿辐射特征

 采用Parikh量子隧穿方法,研究了一个环似(atorus-like)黑洞的量子隧穿效应.结果表明在能量守恒的条件下,此黑洞事件视界和宇宙视界处粒子的隧穿率与Bekenstein-Hawking熵有关,真实的辐射谱不再是严格的纯热谱,这是对Hawking纯热谱的正确修正.     

Schwarzschild de Sitter黑洞的量子隧穿辐射

作者在研究Schwarzschild de Sitter黑洞纯热谱的基础上，又采用量子隧穿方法对该黑洞的隧穿辐射进行研究.结果表明，Schwarzschild de Sitter黑洞视界处的粒子隧穿率与BekensteinHawking熵有关，证实其辐射谱不再是严格的纯热谱.     

Garfinkle-Horowitz-Stromingen dilaton黑洞的Hawking隧穿辐射

用量子隧穿法研究Garfinkle—Horowitz—Stromingen dilaton黑洞的Hawking辐射,得到了静止质量为零和不为零的两类粒子穿过黑洞事件视界的出射率,发现粒子的量子隧穿辐射谱与黑洞的Bekenstein—Hawking熵变有关,辐射谱不再是严格的纯热谱．     

一个新形式Kerr黑洞的纯热辐射谱与隧穿辐射谱的比较研究

根据Hawking热辐射理论和Parikh的半经典量子隧穿模型，作者选择了一种零标架对该Kerr黑洞Dirac 粒子热辐射的研究表明，其热辐射谱是纯热谱.对该Kerr黑洞量子隧穿辐射的研究结果却表明，在能量守恒和角动量守恒的条件下，此黑洞事件视界处粒子的隧穿率与Bekenstein-Hawking熵变有关，真实的辐射谱不再是严格的纯热谱，但满足量子力学中的么正性原理，这是对Hawking纯热谱的一种修正.     

荷电旋转BTZ黑洞的Hawking隧穿辐射

运用Parikh量子隧穿模型,研究荷电旋转BTZ黑洞的量子隧穿效应.其结果表明:在能量守恒和角动量守恒的条件下,黑洞视界处的粒子出射率与熵变有关,辐射谱不再是严格的纯热谱.     

一般静态球对称黑洞的Hawking隧穿辐射

运用Parikh-wilczek的量子隧穿模型和黑洞热力学第一定律研究一般静态球对称黑洞的Hawkoing辐射,得到了静止质量为零和不为零的粒子穿过黑洞事件视界的出射率具有完全相同的函数形式,发现粒子的量子隧穿辐射谱与黑洞的Bekenstei-Hawking熵变有关,辐射谱不再是严格的纯热谱.     

Quintessence黑洞的量子隧穿效应以及黑洞遗迹

天文观测发现了暗能量的存在,因此可以讨论暗能量所包围的静态球对称黑洞。运用了Parikh的量子隧穿模型,研究了Quintessence黑洞的量子隧穿过程以及黑洞遗迹问题。结果表明,在能量守恒的条件下,黑洞外视界和宇宙视界处的粒子出射率与Bekenstein-Hawking熵有关,辐射谱不再是严格的纯热谱。在考虑一级修正后得到具有对数项的粒子隧穿几率,并讨论了黑洞遗迹的存在的可能性。     

对稳态轴对称NUT-Taub黑洞隧穿辐射特征的研究

采用量子隧穿辐射的新方法,并考虑到能量守恒,深入研究了稳态轴对称NUT-Taub黑洞的隧穿辐射特征.结果表明,黑洞视界处粒子的隧穿牢与Bekenstein-Hawking熵有关,其真实的辐射谱不再是纯热谱.     

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.