学年论文管理系统

本文阐述了学年论文管理系统的设计思想和设计方案，给出了系统用例图，以及数据库ER模型，相信对教学管理工作的发展有一定的意义和实用价值。使用本系统减少了工作人员的重复工作，从而提高了学年论文管理工作的质量与效率。     

专家系统在冲压模具初始设计中的应用

提出了专家系统应用于冲压模具初始设计的思路 ,简要介绍了此专家系统的总体结构 ,详尽分析其知识表示方法、知识库结构及推理机的设计。知识表示方法和知识库结构的设计引入面向对象技术和数据库技术 ,推理机用面向对象推理机与面向过程推理机共同实现     

一种基于构件技术和数据库的专家系统框架

在综合分析了目前开发专家系统常用的几种技术和用构件技术开发软件系统的特点的基础上，提出了一个以构件技术和数据库技术相结合的构建专家系统的解决方案．该方案将知识以关系数据库的形式表示，采用专家系统的推理机方法实现对结果分析，给出了用构件技术构建基于数据库的专家系统的框架，使专家系统的构建变得方便快捷和更切合需要．最后给出了一个检测分析专家系统的实例．     

汽车总体设计专家系统的研制

以VC 6.0,SQL Sserver7.0和UGⅡ作为开发环境，在认真分析汽车总体设计阶段的任务和特点的前提下。利用人工智能技术，数据库技术，参数化绘图技术和面向对象方法开发了一个专家系统，该系统能基于专家知识推理出总体设计阶段所需的各参数，最终绘出参数化的三维总布置图，并可进行总布置校核。     

专家数据库系统中知识库与数据库的结合

本文提出了一种专家数据库系统中知识库的设计方法，采用关系模式来描述知识库，用数据库方法存储管理知识库，这样就可以用数据库系统设计语言来设计推理机，用DBMS改善知识库管理的性能，克服专家系统不能有效地利用现有的使用常规数据库技术建造起来的数据库的局限。     

基于数据库技术专家系统的设计与实现

传统的专家系统可对知识进行搜索和推理，但却缺乏对海量知识的高效管理能力，为了克服这一局限性，利用数据库技术提出一种新的专家系统模型，该模型所采用的方法摆脱了专家系统应用对专家系统开发工具的依赖，对规则、事实数据可以进行方便管理，改进推理树的实现算法，实现了知识库与数据库的有机结合，为更广泛的应用提供基础．     

露天矿铁路运输调度专家系统中动态数据库的建立

介绍了在微机上用ＰＲＯＬＯＧ逻辑程序设计语言，对列车、站场和线路等矿山铁路运输调度的信息进行动态管理，以便维护矿山铁路运输调度专家系统的正常运行，为矿山生产的配车优化提供了现代化管理手段和方法．     

数据库设计专家系统自然语言接口研究

该文应用人工智能技术对数据库设计专家系统的自然语言接口设计作了初步探索。作为实例,为数据库设计专家系统(ERGTORS)设计了一个具有有限英语子集的自然语言接口,并在IBM-PC上用Turbo Prolog实现。     

面向对象的设计类专家系统建模方法研究

从面向对象的设计方法出发，对把该方法应用于设计类专家系统进行了研究。提出了此类专家系统建模的三步曲，并将该方法应用于面向对象的压铸模设计专家系统中。     

计算机辅助工艺设计中的工艺规程决策方法的探讨

本文介绍了在计算机辅助工艺规程设计中，采用专家系统和产生式原理所建立的一种创成式ＣＡＰＰ系统，该系统已在生产实践中取得了较好的效果     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that