类氖W64+离子基态双电子复合过程的细致能级计算

本文使用相对论组态相互作用方法计算了0.1E₁≤kT_e≤10E₁（E₁是类钠钨离子的第一电离能E₁=7129.5 eV）温度范围内类氖W⁶⁴⁺离子基态双电子复合（DR）速率系数.类氖W⁶⁴⁺离子基态DR过程需要考虑（2s2p）⁷3ln′l′,（2s2p）⁷4l4l′以及（2s2p）⁷4l5l′双激发自电离组态.对于（2s2p）⁷3ln′l′双激发自电离组态,轨道角量子数l′>8的（2s2p）⁷3ln′l′组态对双电子复合速率系数的贡献可以忽略不计;（2s2p）⁷3ln′l′组态双电子激发自电离态的高里德堡态对双电子复合速率系数的贡献满足n′^-3组态-组态外推法.对细致计算得到的类氖W⁶⁴离子基态DR总速率系数进行了拟合,得到W⁶⁴⁺离子基态在0.1E₁≤kT_e≤10E₁温度范围内的总DR速率系数随电子温度变化的经验公式.     

W~(40+)离子双电子复合速率系数的理论研究

利用基于全相对论组态相互作用理论的FAC程序包,详细研究了类硒W40+离子从基组态3s23p63d104s24p4俘获一个电子形成双激发态(3s23p63d104s24p4)-1 nln′l′(n=4~6,n′=4~100)的双电子复合(DR)过程.通过对不同壳层电子激发的DR速率系数的比较,得到了主要的电子激发DR通道,并且发现由4p电子激发的DR速率系数对总DR速率系数有重要贡献.在1~5×104 eV温度范围内,计算得到了n′=4~16的DR速率系数,并外推到n′=100,进而得到总DR速率系数.给出了Δn=0,1,2三类芯激发对总DR速率系数的贡献,发现对总DR速率系数的主要贡献来自于Δn=0,1的芯激发.对总DR速率系数和辐射复合(RR)以及三体复合(TBR)速率系数进行了比较,发现DR速率系数在研究的温度范围内远大于TBR和RR速率系数.为了方便应用,对总DR速率系数进行了参数拟合.     

Gd~(19+)离子双电子复合速率系数的理论研究

基于全相对论组态相互作用理论,详细计算了类铑钆离子的双电子复合(DR)速率系数;研究分析了内壳层电子激发、辐射通道和级联退激对DR速率系数的影响,以及DR速率系数随高n电子轨道角动量的变化.结果表明,内壳层4p电子激发以及级联退激对DR速率系数的贡献不可忽略.对双电子复合、辐射复合以及三体复合速率系数做了比较,在温度大于1eV时,双电子复合速率系数都大于辐射复合和三体复合速率系数,相应的DR过程对于等离子体离化态分布和能级布居以及光谱模拟都极为重要.同时,对基态和第一激发态的DR速率系数进行了参数拟合.     

高离化类锂离子（Z=72～75）的态—态双电子复合

基于相对论多组态ＨＦ程序，采用畸变波理论和独立共振近似，计算了０．１～９．０ｋｅＶ温度范围的类锂高电荷离子Ｈｆ＾６９＋，Ｔａ＾７０＋，Ｗ＾７１＋和Ｒｅ＾７２＋对应于原子实△ｎ＝０，１激发的态－态双电子复合速率系数，讨论了复合速率系数随电子温度，原子序数，复合类型以及双激光发态中俘获电子的主量子数的变化关系，计算结果表明，不同复合通道的速率系数存在的很大差异，由此提出了通过双电子复合过程来实现高电荷     

类氦钨离子KLL双电子复合过程的理论研究

利用基于多组态Driac-Fock(MCDF)理论方法发展的程序包GRASP及FAC程序包,详细计算了共振双激发态1s2l2l′的共振能量、自电离速率、辐射速率及双电子复合截面.重点讨论了Breit相互作用对类氦钨离子双电子复合截面的影响.     

类氖氙离子基态的双电子复合过程研究

使用相对论组态相互作用方法计算了电子温度在0.01EI≤kTe≤10EI(EI=3332eV,是类钠Xe43+离子的第一电离能)范围内基态类氖Xe44+离子的双电子复合(DR)速率系数。对类氖Xe44+离子基态DR过程贡献最大的是(2s2p)73ln′l′双激发自电离组态,对总DR速率系数的贡献略大于90％,其中最主要的贡献来自(2s2p)73l3l′,(2s2p)73l4l′组态,占总速率系数的70％以上。对于通过(2s2p)73ln′l′类钠氙离子双激发自电离组态的双电子复合过程,l′>8的贡献可以忽略,n′>12的贡献满足n′-3组态-组态外推法则。     

I~(51+)离子的KLn双电子复合过程研究

使用相对论组态相互作用方法计算类氦I离子的KLn双电子共振强度、速率系数.双电子复合共振强度随着n的增加迅速降低.对于同一个双激发态,通过内壳层衰退的双电子复合共振强度和速率系数高于通过外壳层衰退的双电子复合共振强度和速率系数.通过内壳层2p电子辐射衰退的通道1s2pnl-1s2nl是最主要的KLn双电子复合辐射衰退通道.1s2pnl-1s2nl辐射衰退通道中对双电子复合速率系数贡献最大的是1s2p2-1s22p辐射衰退通道.1s2p2-1s22p辐射衰退通道的双电子复合速率系数占1s2pnl-1s2nl辐射通道速率系数的70%.     

类铷等电子序列双电子复合过程的理论研究

基于全相对论组态相互作用理论的(FAC程序包,详细计算了类铷等电子序列离子双激发态(4s~24p~64d~1)-1nln'l'n=4,5,6,n',≤23,l'≤12)7个离子(Sb~(14+),Te~(15+),Xe~(17+),Tb~(28+),Hf~(35+),W~(37+),Au~(42+))的双电子复合(Dielectronic reombination DR)速率系数,并用能级到能级的方法外推到n'=1 000.分别研究了激发通道和辐射通道、共振稳态跃迁(RS)和非共振稳态跃迁以及辐射跃迁到可自电离态及随后的级联退激(,DAC)对DR速率系数的贡献,分析了各种效应随着原子序数(Z)的变化规律.研究表明RS+NRS随着Z的增大对速率系数的影响越来越大,而DAC的贡献随着Z的增大越来越小,对于Au~(42+)离子(Z=79),其贡献在,50 000 eV处最大,达到14.36%,仍不可忽略.最后,总结了这7个离子总的DR速率系数的规律.为了便于使用对7个离子总的DR速率系数进行了参数拟合,得到了适用于类铷等电子序列的适用于中高温区域的一个经验拟合公式.     

Au离子双电子复合速率系数的理论研究

利用全相对论组态相互作用理论方法,研究了Au33+离子由基态俘获一个电子形成双激发态(3d104s24p64d10)-1nln'l'(n=4~6,n'=4~15)的双电子复合(DR)过程。分析考虑了双激发态j=4d94f15p级联辐射退激到末态f=4d94fn'l'(n'=9,12.l'=0,2),可知DAC效应对DR速率系数有不可忽略的影响。研究分析了4d电子激发到不同壳层的DR速率系数以及在综合了分析得到对Au33+离子DR过程有明显贡献的各种因素后,进一步得到了总DR速率系数。     

类铑等电子序列双电子复合的理论研究

基于全相对论组态相互作用理论的FAC程序包,详细计算了类铑等电子序列10个离子(Sn~(5+),Sb~(6+),Te~(7+),Xe~(9+),Gd~(19+),Tb~(20+),W~(29+),Re~(30+),Au~(34+),Tl~(36+))的双电子复合(Dielectronic recombination, DR)速率系数,研究了激发通道和辐射通道,共振稳态跃迁、非共振稳态跃迁和辐射跃迁到可自电离态及随后的级联退激对双电子复合的贡献,分析了各种效应随原子序数的变化规律.结果表明,级联退激的贡献随着原子序数的增大越来越小,至Tl~(36+)离子(Z=81),其贡献在4 000 eV处有19.98%,仍不可忽略.仅考虑共振稳态跃迁和非共振稳态跃迁贡献计算值与又考虑了级联退激贡献计算值的偏差在13.40%以内.为了方便使用,对得到的总DR速率系数进行了参数拟合.并且总结了总的DR速率系数的规律,得到了适用于类铑等电子序列中高温处的一个经验拟合公式.     

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.