UML技术在Web开发中的应用

基于Web的应用系统变得非常普遍，对Web系统进行有效的建模是降低Web应用开发风险的重要方式。简要介绍了UML技术和Web应用程序框架，并对UML进行了扩展使得Web特有的构件能与系统模型的其余部分集成。     

UML在软件系统开发中的应用

针对UML在建模方面的优势,结合一个具体的实例,从系统的功能分析、系统设计到系统实施,介绍了应用UML建模的方法,重点描述了基于UML软件系统开发的建模过程,并通过软件设计平台Power Designer 15,构建了系统的需求模型、静态模型和动态模型,从而可以自动生成特定语言的代码框架,使程序的开发效率和成功率得到提高。     

模型驱动的开放式结构悬挂物管理系统设计方法

开放式结构悬挂物管理系统是机载悬挂物管理系统的发展方向,可以将武器的设计与具体实现相分离,实现武器集成的松耦合.提出基于模型驱动的开放式结构悬挂物管理系统设计方法,采用UML设计平台无关模型,采用AADL设计平台相关模型,论述了基于UML Profile的UML模型到AADL模型的转换方法,最后,以一个设计实例描述了该方法的设计过程.结果表明:基于模型驱动的开发方法为开放式结构悬挂物管理系统的设计提供了有效的解决方案,实现了系统设计与平台实现的分离.     

开源Java Web框架集成研究

针对基于Java的Web应用系统设计与开发,探讨了Java Web技术、开源Java Web开发框架,然后对MVC模式在框架中的实现以及表现层、控制层、业务逻辑层、数据持久层的相关开发技术进行了研究和分析.最后给出一个基于Freemarker、Webwork、Spring框架的通用Web应用的系统模型.     

基于UML模型的组件集成测试方法

统一建模语言（UML）已经广泛应用于基于组件的软件开发过程中.许多UML模型，如交互图、状态图和组件图等从不同的角度刻画了组件的行为，可将其用于基于组件的软件系统的测试.本文首先提出了一个基于UML模型的测试框架，并对基于UML模型的组件集成测试方法进行了比较，然后将基于协作图的组件测试技术应用于ATC系统的集成测试，取得较好效果.     

基于Spring的Acegi安全框架的集成研究

分析了Acegi安全框架的体系结构,详细阐述了Acegi实现原理,分别将Spring框架的IoC、AOP及TDD测试机制应用到Acegi框架中,深入探讨了基于Spring的Acegi框架的集成,以满足复杂的企业安全需求,从而提高了企业应用系统的安全性和稳定性。     

基于角色的Acegi权限控制的初步研究

任何一个完整的应用系统,完善的认证和授权机制是必不可少的。传统的做法是通过编写代码,在actions或servlets中判断登录的用户是否有权限访问该资源,这样就使安全逻辑和业务逻辑耦合在一起,这与软件系统要求高内聚,低耦合的原则相违背。Spring框架是一个优秀的多层J2EE系统框架,Spring本身没有提供对系统的安全性支持。Acegi是一个基于Spring的安全架构,所有的安全逻辑通过Spring的标准配置文件的定义就可实现,系统的业务逻辑和安全逻辑完全分离,采用Acegi安全框架不仅节省工作量,提高编码效率,同时提高代码质量。本文探讨了Ace-gi安全框架中各部件之间的交互,并通过扩展Acegi数据库设计来实现基于Spring框架的应用的安全控制方法。     

Struts+Spring+Hibernate框架的整合实现

分析了Struts框架、Spring框架和Hibernate框架在Web应用中不同层次上所发挥的作用,通过整合三种框架设计出了集成框架的Web应用模型,解决了系统各层之间的松耦合问题.该Web应用模型在气象科技管理系统中得到了实现和应用.     

基于J2EE的航空订票系统设计与实现

航空订票系统是航空公司信息系统中最为主体的系统,直接关系到航空公司的经济效益。对航空订票系统进行描述和分析,并使用UML来建模。航空订票系统使用Struts2+Spring+Hibernate+Ajax整合开发,此方法对于创建基于Web的应用系统具有很好的借鉴作用。     

Java EE平台上松耦合Web应用模型设计与实现

本文在JavaEE平台上利用成熟的框架和设计模式,以Spring框架为核心,表示层使用Struts框架,持久层使用Hibernate框架构建一个松散耦合的Web应用模型,使用该模型可建立一个可伸缩、可重用、可扩展的Web应用系统。     

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.