一个基于案例的动态工作流模型

提出了一个基于案例的模型,实现工作流系统的执行动态性和自适应性,工作流接口、定义和案例3个概念的分离实现了动态性,工作流目标以及工作流过程的邦定成为一个动态的可随时调整的过程,采用了基于案例推理的方法,有效地利用工作流系统的日志,在工作流执行过程中根据环境和工作流日志,不断地作出优化调整,实现自适应性。     

基于角色的动态工作流模型的研究

针对电子政务系统的实际需求和传统工作流技术的局限性，对工作流管理模型进行了扩充．提出了一个基于角色的动态工作流设计模型．     

工作流系统在医药MIS系统中的应用研究

阐述了工作流系统的基本概念,介绍了基于XML的流程设计和工作流引擎的设计,使企业可以根据业务流程动态构建企业信息系统.     

基于移动Agent和Web Service的动态工作流互操作模型

工作流产品之间的协作成为企业间有效合作的瓶颈．虽然大多数厂商之间已解决了一些工作流互操作问题，但往往是静态的，为了提高工作流互操作的灵活性，需要各工作流系统支持动态工作流互操作．在此分析了动态工作流互操作中存在的问题，归纳了实现动态工作流互操作需要解决的问题，然后提出了一个基于移动Agent和Web Senrice的动态工作流互操作模型，给出动态工作流互操作相关的实现描述，最后结合一个具体实例通过数据验证此模型的优越性．     

基于B/S的工艺工作流管理的研究

根据工作流管理联盟(WFMC)的工作流参考模型，结合Web技术，提出了基于B／S工艺工作流管理，阐述了基于B／S的工作流管理原理和工艺工作流管理，并在CAPP系统中实现了工作流管理功能。     

基于移动代理平台Aglet的柔性工作流的研究与实现

分析了柔性工作流管理系统的特点以及可移动Agent技术，提出了一种基于移动代理平台的柔性工作流管理系统的体系结构，并采用Aglet平台实现了原型系统．在原型系统中，业务过程的定义封装在可移动的工作流引擎Agent中，MA(Mobile Agent)迁移到各执行任务的角色所在节点，驱动并监控任务的执行；利用多个Agent之间位置透明的通信、协同工作，使得业务过程的定义在执行中可动态修改，实现了工作流的柔性．     

办公自动化系统中工作流配置软件的设计与实现

办公自动化系统的核心是工作流的定义与配置，分析研究了工作流系统，提出了图形化工作流配置软件的设计思想，并实现了一种基于Lotus Notes/Domino群件体系结构的图形化流程配置软件。     

基于工作流机制的办公系统设计

工作流技术是计算机支持的协同工作领域的一个新的研究热点。工作流管理系统是实现网上办公自动化的有力软件工具。分析了当前基于Web技术的工作流管理系统的研发状况，介绍了工作流联盟定义的工作流参考模型及工作流参考模型的接口，并针对基于web环境下的办公自动化系统的要求，提出了将工作流机制与web技术相结合应用到办公自动化管理系统中的思想，描述了工作流管理系统的层次结构和具体实现算法。     

工作流动态变化问题的解决方法

从工作流动态变化问题出发分析了当前工作流软件的弊端，提出了一种通过计算变化区域来支持工作流动态变化的方法，并且结合实例，即开发的一个办公自动化系统中工作流发文管理部分对这种方法进行了说明，结果表明，这种方法可以很好地解决工作流动态问题。     

基于角色的动态工作流模型的研究

针对电子政务系统的实际需求和传统工作流技术的局限性,对工作流管理模型进行了扩充,提出了一个基于角色的动态工作流设计模型.     

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.