ASP技术在动态系统开发中的应用

本文针对ASP(Active Server Pages)技术的特点，提出了构建动态网页快速存取数据库的思想，并给出了开发动态的、交互式的Web网页存取数据库的具体方法;还介绍了ASP技术的基本概念、内建对象、工作原理，重点是利用ASP技术实现对数据库操作的要点。     

ASP技术在Web数据库系统中的应用

介绍了ASP技术的结构、特点；详细说明了利用ASP访问Web数据库实现的方法；列举了应用ASP技术访问Web数据库的实例。     

ASP、ODBC与Web数据库开发

为了使用ASP技术方便快捷地开发出Web数据库,本首先介绍了利用ASP开发动态Web页面的优势及其开发的Web数据库的执行步骤,然后分析了ODBC的工作原理,简述了ASP的数据库技术ADO,接着剖析了包含数据库存取操作的ASP件,最后以一实例来详述利用ASP开发Web数据库的实现过程。     

基于数据库和ASP的网上选举系统

指出了ASP技术由于其方便,灵活及可扩充性等特点,在Web数据库的开发中体现出强大的优势.介绍了ASP的主要技术特点及其数据库的访问原理和ADO对象,通过实例提出了一种应用于选民投票的基于数据库和ASP的网上选举系统的开发方法,讨论了该系统的数据库,给出了主要程序设计流程图.该系统具有投票资格认证、票数统计及实时显示功能.     

ASP访问Web数据库技术与应用

阐述了Windows操作系统中ⅡS内含的ASP和ADO技术的结构与特点,总结了采用ASP技术访问Web数据库的步骤,并结合目前我校校园网与远程教学的发展,给出了在基于Ｗeb的自主学习远程教学系统中,使用ASP与ADO技术相结合访问答疑数据库的应用实例。     

ASP网页中应用ADO实现数据库连接

随着网络技术的飞速发展，承载着网络中信息传递主要功能的网页技术也在发生着重要的变化，从最初的HTML静态页到动态网页，从C／S（客户机／服务器模式）到B／S（浏览器／服务器模式）。网页技术与数据库的结合使用已经成为网页技术发展的主要方向，现在网络中我们常用的BBS论坛、电子商务、信息检索系统均要使用数据库存储交互所需要的数据。本文探讨了基于ASP动态网页应用ADO实现数据库连接的方法。     

利用ASP技术开发基于Web的数据库应用系统

通过比较各种动态Web技术的特点 ,分析了选用ASP技术用于Web数据库应用系统开发的必要性 ,结合实例讨论了基于Web的数据库应用系统开发中所要解决的关键问题 ,并用InterDev6.0和VisualBasic6.0给出应用实例     

基于ASP技术实现网络数据库数据的访问

基于数据库连接DSN的创建分析比较了三种不同DSN的优缺点,并通过ASP页面设计实例叙述了如何利用ASP技术访问网络数据库中的数据。     

利用ASP技术实现Web数据库的访问

将Web技术与数据库相结合，开发动态的Web数据库应用是当今Web技术研究的热点，对Web数据库实现高效的访问是站点开发的关键技术。本文通过实现一个简单的新闻网站，介绍了动态网页和Web数据库的设计，并利用ASP实现了与Web数据库的访问。     

基于ASP技术的学生信息管理系统的研究与开发

通过比较5种远程数据库解决方案，介绍了ASP技术的特点，编程技巧，并以学生信息管理系统的开发为例，讲述了ASP技术在网络数据库方法的具体应用。     

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.