XML在计算机辅助排课系统中的应用

新一代标记语言XML是开放环境下描述数据信息的标准技术Web服务是通过Web被编程访问的组件；ADO．NET是．NET平台数据库连接技术利用XML自我描述和方便数据交换的特点，结合Web服务与ADO．NET等相关技术，将其应用计算机辅助排课系统，使系统基于Web实现，方便了数据表示与交换，提高了数据传输的效率，从而进一步提高了排课效率。     

Web网络数据库访问技术及其在CAPP中的应用

随着 Internet技术和 Web技术的发展 ,计算机辅助工艺设计 ( CAPP)系统向基于 Web平台的发展已成为可能。分析研究了对基于 Web的 CAPP系统网络工艺数据库的访问技术 ,提出了在 Internet环境下 ,应用 A SP数据库访问技术实现Web网络数据库访问的具体方法 ,并给出了 ASP在分散网络环境下 CAPP系统中的应用实例     

分布异构网络环境下数据访问设计

在现有Web数据库访问技术的基础上 ,引入了分布式对象技术 :CORBA(CommonObjectRequestBrokerArchitecture) ,来构建基于CORBA的Web数据库系统的体系结构。本文论述了基于分布对象技术的Web数据库访问的对象表述、访问方法和设计过程 ,并应用公司职员档案管理系统实例进行分析和论述。     

制造业信息化培训中心网站的开发与实现

描述了基于Web的制造业信息化培训中心(NTCMIE)网站的开发过程。项目采用J2EE三层体系架构，包括数据访问层，业务逻辑层和显示层，重点讨论了网络学堂模块的技术实现过程。     

基于ASP技术的B/S结构实时监控系统

在工厂级监控中，动态Web页利用ADO技术，通过ODBC数据库访问，实现监控数据的实时浏览。本文采用B／S模式，SOL Server2000作为数据库管理系统，Visual InterDev6．0作为开发工具，ASP作为关键访问数据库的技术，实现了基于B／S结构的实时监控系统。     

基于虚拟仪器技术的过程实时数据管理系统研究

针对流程工业过程实时数据的高效管理问题,提出了一种基于虚拟仪器技术的过程实时数据管理系统设计方法,给出了系统的体系结构;构建了一种基于Hash二叉树的改进型数据查询和索引结构,该结构提高了实时数据访问和索引的效率。通过基于ADO.NET的接口程序和数据压缩模块实现了对历史数据的管理。实验测试表明,该系统在处理实时数据方面具有高度的稳定性和可靠性。     

基于SOA的办公自动化管理系统设计

基于SOA理论,本文以办公自动化管理系统的设计为例,运用面向服务的分析与设计方法（SOAD）和Web服务技术,利用可视化统一建模语言UML和面向服务的统一过程（SOUP）进行分析和建模。系统应用以下技术提高整体性能：采用Web缓存技术加快系统的响应时间,采用数据库连接池技术提高数据库的存储访问效率,采用同步令牌机制Token避免重复提交,有效减少了冗余数据的产生等等。     

面向交易实时数据库内存数据的组织方法

研究面向大规模电子交易实时数据库中密集内存数据的高效组织方法.采用线性存储池实现内存数据的物理存储组织,并根据交易事务更新内存数据的update-in-place和append-only特点,采用T树索引实现元组固定数据的逻辑组织,采用缠绕的双向链式索引实现动态数据的逻辑组织.简化了物理空间的分配和调整算法,提高了数据更新和索引重构的效率,降低了内存数据查询访问的时间复杂度.结果表明,基于T-树索引和链式索引的数据查询算法的时间复杂度分别控制在O(lnN)和O(ln(N 1)-1),满足大规模电子交易的需要.     

重复数据删除中的无向图遍历分组预测方法

针对重复数据删除系统中存储容量受内存限制难以进行扩展的问题,提出了一种基于无向图遍历的重复数据删除分组预测方法.该方法将索引表保存在磁盘中,并在内存中维护索引表缓存,以此提高系统最大可支持的存储容量.对于索引表缓存命中率低、系统性能差的问题,采用了图遍历分组方法予以解决,根据数据块访问序列特征信息建立无向图并进行分析,基于分析结果对索引项进行分组,并以组进行缓存替换,从而提高缓存命中率和系统性能.实验结果表明,基于缓存预取原理和无向图遍历分组,在将缓存设置为索引表大小的10％时,重复数据删除存储系统最大存储容量比原有方法提高了7.5倍,缓存命中率由不进行索引项分组时的47％提高到87.6％.     

基于TB+树云服务性能监控数据索引算法研究

云计算为充分发挥计算性能提供了解决方案,为了能更好支持云计算,对其进行监控成为了一个重要的问题。随着监控数据的增加,快速、准确地访问监控数据成为监控处理的约束。通过构建合适的索引,可以较好地改善大数据量查询的效率。本文给出了一个拥有大数据量的虚拟服务监控系统的存储模型,并给出了基于该模型之上的TB 树(Time B -Tree)二级索引模型。该索引提供了时间点和时间段的两种数据访问方式,经过实验验证,该索引方案获得了较好的访问性能。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

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.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

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.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-