基于案例推理的钻井复杂情况专家系统

传统的钻井专家系统采用基于规则的推理,对于难以规则化的典型案例不能够充分利用。为此设计开发了基于案例推理的钻井复杂情况专家系统(DTES),目的在于利用专家会诊得到的许多具体案例经验,对钻井过程中经常发生的各种各样的复杂问题进行及时、准确的识别和处理,从而提高钻井工作效率。示例结果表明该专家系统简便实用,能很好地提供现场支持。     

基于案例的推理及其在专家系统中的应用

基于案例的推理是继基于规则推理的又一专家系统设计技术。结合房地产估价专家系统，着重论述了基于案例推理的基本原理及实现过程。     

基于网络的案例推理专家系统

基于案例推理与网络的结合是案例推理技术发展的一个重要方向.根据网络的特点,提出采用面向服务的体系结构实现网络上的CBR专家系统,并基于J2EE平台实现了此CBR专家系统,以适应网络环境下知识工程的发展.     

基于范例推理的结核病专家系统

本文概述了什么是基于范例的推理，结核病数据库的建立，基于范例的推理在结核病专家系统中的应用，推理树与基于范例的推理的结合，其于范例推理的结核病专家系统的工作原理，模糊匹配与近似检索技术，以及基于范例推理的专家系统的应用前景。     

基于范例推理的结核病专家系统

本文概述了什么是基于范例的推理，结核病数据库的建立，基于范例的推理在结核病专家系统中的应用，推理树与基于范例的推理的结合，基于范例推理的结核病专家系统的工作原理，模糊匹配与近似检索技术，以及基于范例推理的专家系统的应用前景     

中医诊断专家系统中融合案例与模糊规则的推理机制研究

阐述了基于案例的推理和基于规则的推理的基本概念和原理,结合中医领域知识的特点,对传统的规则通过引入模糊逻辑,提出一种模糊规则推理机制进行知识的表示、获取和推理,并提出一种融合案例与模糊规则的推理机制,用于解决中医诊断专家系统的实际问题.     

案例推理和规则推理相结合的农业专家系统的研制

简要介绍了基于规则推理建立传统专家系统中遇到的一些问题，同时对基于案例推理的方法进行简单描述，提出了将两者相结合的农业专家系统，设计了该专家系统的整体结构图和工作流程，并对实现系统的部分关键技术进行探讨和构想；最后以马铃薯病害决策为例介绍了系统的工作步骤，验证了以此提高求解问题的可靠性，增强了系统在实际应用中的适用性。     

城市公共交通智能调度专家系统的研究

根据城市公共交通调度、专家系统知识及模糊控制理论建立了公交智能调度专家系统。该系统采用案例与规则两级推理机制,通过产生式规则实现对知识的表达,应用关系型数据库实现对知识的管理与操作。案例推理中设计了代码与属性两层匹配的推理策略,针对实际调度中的不精确判断,根据模糊控制与模糊推理的思想设计了模糊规则与模糊推理策略实现了基于规则的推理。该系统对实现公交系统智能化、提高公交调度的质量和效率具有重要的意义。     

远程故障诊断中融合推理及信息反馈的研究

基于案例推理(CBR)与基于规则推理(RBR)的专家系统优势互补,并在机械故障诊断领域中有了一定的应用,但仍然受到知识库"瓶颈"的约束.文章提出了将CBR与RBR相结合的专家系统引入远程故障诊断中,使得系统的学习能力增强,知识库扩展速度提高;并引入信息反馈,提高了案例标本的准确性,更大程度地提高了故障诊断的效率及准确率...     

学生网上选课专家系统

本系统基于网络的计算机系学生选课专家系统是为了适应导师制的需求而建立的。本系统在学生进行课程选修时，向学生提出专家性的建议和指导，帮助学生完成选修课程的工作；另外，还可以协助老师发布选修课程的有关信息。系统采用三级体系结构。专家系统的构建以产生式系统为基础并结合基于案例的推理。     

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.     

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。     

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.     

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.     

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     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with