具非零边界条件的p-Ginzburg-Landau泛函径向极小元的惟一性

研究具非S¹值边界条件的p-Ginzburg-Landau 泛函的径向极小元的零点分布, 并证明了径向极小元的惟一性.     

一类p-能量泛函径向极小元的C1,α收敛性

研究了具非S1值边界条件的p-能量泛函的径向极小元的收敛性.利用局部分析的技巧,推出了能量泛函的正则性估计,并由此得到泛函的径向极小元的零点分布在原点和单位圆周附近.在此基础上,利用Euler方程解的正则性估计,得到极小元的C1,α收敛性和收敛速度的估计.     

一类p-Ginzburg-Landau型径向极小的零点分布和渐近性态

研究了一类与超导相关的p-Ginzburg-Landau 模型,其中p>2.给出了这一类泛函的径向极小元的零点分布,并证明这个极小元的W1,p局部收敛性.     

关于Planar Ferromagnets and Antiferromagnets泛函的径向极小元的注记

就Bethuel,Brezis和Helein提出的问题讨论了Planar Ferromagnets and Antiferromagnets泛函在H={u(x)=(sin f(r)x/|x|,cos f(r))∈H1(B1,S2); f(0)=0, f(1)=π/2,r=|x|}中的径向极小元的一些性质,其中包括此泛函的径向极小元的零点的分布及若干个上界估计,并给出了这一问题的肯定回答.     

一类Landau-Lifshitz型泛函的极小元的渐近性态

在函数类空间:W={u(x)=[sin f(r)eidθ,cos f(r)]∈H1(B,S2);u|坠B=g}中,研究Landau-Lifshitz型泛函Eε(u,B)=1/2∫ B︱▽u︱2dx+1/2ε2∫Bu23dx的径向极小元uε的渐近性态。通过建立径向极小元uε的H1局部收敛性,给出了u2ε3收敛到0的速度估计。     

一类Landau-Lifshitz型泛函的极小元的零点分布

在函数类空间:W={u(x)=(sinf(r)eidθ,cosf(r))∈1(B,S2);u|(a)B=g}中研究Landau-Lifshitz型泛函Eε(u,B)=1/2∫B| ▽ u|2dx+1/2ε2∫Bu23dx的径向极小元uε当ε→0时的极限行为,通过给出uε的整体估计和引入尺度定理,得到了径向极小元uε的第...     

具变系数的Ginzburg-Landau泛函的径向极小元

作者研究了具变系数的Ginzburg-Landau模型，给出了这一Ginzburg-Landau泛函的径向极小元的零点分布，并证明了它的H^1局部强收敛性以及惟一性。     

高维情形下铁磁与反铁磁泛函可正则化极小元的C 1,α收敛性

研究一类与铁磁和反铁磁相关的泛函模型, 其中p∈(n-1,n), n≥3. 利用局部分析技巧, 讨论了这类泛函的正则性估计, 证明了泛函可正则化极小元的W^1,p_loc收敛性, 并利用Euler方程解的正则性估计, 得到此泛函径向极小元的C^1,α收敛性及收敛速度的估计.     

环域上p-Ginzburg-Landau泛函的径向极小元

研究一类环域上p-Ginzburg-Landau泛函的径向极小元uε当ε→ 0时的极限行为. 讨论了u_ε的零点分布, 运用局部分析技巧证明了
零点分布在环域的边界附近. 利用迭代方法, 建立了能量的局部一致估计, 并在此基础上, 证明了极小元在W ^1,p意义下局部收敛于p-调和映射x|x|^-1.     

p-Laplace积分泛函的极小的径向对称性

证明了在自然条件下ｐ－Ｌａｐｌａｃｅ积分泛函的无约束极小和约束极小必具径向对称性，推广了Ｌｏｐｅｓ在ｐ＝２时的相应结果。     

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.