UML建模分析在机房管理信息系统中的应用研究

统一建模语言(UML)融入了软件工程领域的新思想、新方法和新技术,以UML的图形符号为基础,采用图形符号来描述系统的模型视图。以机房管理信息系统为例,阐述UML建模分析技术在机房管理系统中的应用,描述如何使用UML进行建模分析和开发的具体过程,分析在开发过程中经常出现的问题以及解决方案,并对统一建模语言UML中的用例图、时序图、协作图及建模技术的应用效果进行了深入研究。     

UML活动图在工作流建模中的应用

目前工作流建模方法又很多,但不可通用;而UML是一种标准的可视化建模语言。使用UML对工作流过程建模,可以易于理解和使用。UML活动图可以很好地分析和描述工作流建模的动态机制,可以有效地分析工作流建模过程。通过一个实例,分析了UML活动图在工作流建模中的应用。     

MPLS在虚拟专用网中的应用

首先阐述了虚拟专用网（VPN）和多协议标记交换（MPLS）技术的概念，又描述了MPLS协议在虚拟专用网建设中的应用。主要就MPLS技术应用于虚拟专用网的优势、MPLSVPN的网络结构、内部机制、工作过程及其完全性做了论述。     

UML扩展机制在嵌入式实时建模中的应用

在嵌入式实时系统建模中，针对UML没有专门的图来描述实时性，对时间约束的建模能力不强的情况，提出了一种使用UML扩展机制进行嵌入式实时系统建模的方法，并介绍了该方法的一个应用实例。     

一个工作流元模型的描述方法

论述了工作流元模型的三维性,在采用UML2.0活动图的新特性后,提出了一个基于UML2.0活动图的工作流模型,定义了此模型的形式化和非形式化描述方法,并指出了其建模规则,为探询UML2.0活动图在工作流模型描述方法中应用做了初步尝试.     

基于UML的营销管理系统流程建模

从图元所描述的内容入手研究了UML的静态建模机制和动态建模机制.分析了UML建模的优势.提出了UML建模的六大主要特点.在此基础之上基于UML对客户关系管理中营销管理子系统进行流程建模,构建了营销管理子系统的功能关系图,建立了相关的用例图、类图和动态图.     

UML的建模过程及在空管系统需求分析中的应用

UML是一种面向对象的可视化建模语言，通过不同的模型从不同的角度对系统的需求分析建模。描述了UML的建模过程及其在空管系统需求分析中的应用。     

基于UML2.0活动图的工作流模型研究

总结了UML 2．0活动图新特性,定义了一个基于UML 2．0活动图的工作流模型的形式化描述方法,并提出其基本控制流模式和建模规则．最后用一个应用实例来演示基于UML2．0活动图的工作流模型。     

基于UML的静态类图和ALSD实现建模与编码的统一的方法

统一建模语言UML(Unify Modeling Language)是面向对象软件建模的国际标准，但是UML中缺乏对过程的可视化静态建模部分。抽象逻辑结构图ALSD(Abstract Logical Structure Diagrams)是过程建模的有效表示工具。本文以程序代码的生成为目标，以UML的静态类图和ALSD为基础，结合UML的静态类图与ALSD，探讨了有关的代码生成机制，设计和实现了一个软件开发环境。它填补了类图中方法的可视化描述，实现建模和编码的有机统一，使整个程序的设计完全可视化。     

从UML类图到本体的自动映射

本体(ontology)是描述概念及概念之间关系的概念模型,通过概念之间的关系来描述概念的语义.然而,本体的描述语言种类繁多,阅读困难,不利于本体建模人员交流沟通.UML作为建模领域的公认标准,已被许多人熟知和广泛使用.基于UML和本体建模的相似性,提出利用UML类图描述本体模型,并建立了从UML类图到本体模型的自动映射,以提高本体建模的效率.     

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.