基于通用黑板的数据融合系统

讨论了数据融合与黑板框架的概念 ,分析了黑板框架用于数据融合的优缺点 ,给出了用黑板框架实现的数据融合专家系统 ;介绍一个高效、灵活的黑板开发工具——通用黑板框架 ,以水声信号处理为背景 ,提出了通用黑板实现数据融合的系统结构 ,初步完成了系统的框架构造 .该通用黑板数据融合系统能够充分利用领域知识 ,完成低层的数据融合 ,实现信号解释的双向重处理过程 .     

基于黑板结构的目标级推理——一种适用于机械设计专家系统的模式

本文介绍利用人工智能技术,并结合机械设计的特点构造了一种基于黑板结构的目标级推理模式.用黑板结构描述任务求解状态,每一个任务完成一定的功能,并根据当前黑板状态确定下一步应执行的任务.黑板结构的任务规划模式用框架来表示.框架结构中记录了该任务采用的控制策略,知识源和控制方向等信息,保证了控制推理的灵活性.本文还描述了基于黑板结构的目标级推理在装载机工作装置设计专家系统中的应用.     

基于GA-SVM盐度预报模型的河口水环境决策支持系统

为了进一步强化水文模型的模拟和预报能力,结合Web GIS技术,采用B/S三层模式,探讨了框架实现的若干关键技术,构建了一个高效的河口水环境管理决策支持系统框架.以闽江河口盐度预报为例,将前期研发的GA-SVM盐度预报模型以紧密方式集成到系统框架中,开发了基于GA-SVM盐度预报模型的河口水环境决策支持系统.该系统实现了GA-SVM盐度预报模型与系统框架的无缝集成,提高了系统运行效率,方便了用户使用.     

基于MAS的CAPP与生产调度集成系统

采用分布式人工智能的Agent技术，提出了基于MAS的CAPP与生产调度集成模型。该模型为动态开放式级／层控制结构，采用合同网协议和主动黑板结构等方法，实现系统的运行和信息交互。建立了基于该模型的原型系统，使工艺设计和调度的Agent结构成为既独立又能很好地进行协商反馈的独立模块。原型系统的仿真结果表明，集成模型和实现框架正确，是解决调度瓶颈问题的有效方法。     

基于多智能体技术的出行诱导管理系统研究

将实时道路网络动态交通信息与交通管理专家的知识和经验结合起来,基于多智能体技术设计了以城市现有交通管理中心为基础的出行诱导管理系统.该系统通过黑板模型集成了包含在出行诱导管理过程中的交通问题类型确定、分流交通量预测和分流交通量控制3个智能体.系统使用一个管理智能体通过黑板模型对这3个智能体进行集中控制,使每一个智能体能够与黑板通信,智能体之间在黑板上进行信息分享与协作.研究表明,应用多智能体技术设计的出行诱导管理系统能对出行诱导负效应的产生进行实时跟踪和控制.     

一种基于MAS的分布式控制系统模型

提出了一种基于多 Agent的分布式计算机控制系统的模型 ,分析了该模型逻辑结构和工作原理 ,并通过实例介绍了一种软硬件 Agent的系统开发方法 ,用于分析和设计该系统中的控制单元。利用多 Agent系统的特点 ,将系统划分为若干职能 Agent,各 Agent之间采用黑板方式通信 ,使得控制系统具有良好的开放性与可重构性。该模型在分布式铁路信号计算机控制系统的设计和实施中得到了成功应用     

面向对象的黑板集成模型在ICU医疗辅助诊断中的应用

针对ICU的现状,阐述了研制ICU医疗辅助诊断系统的意义,结合ICU的医疗复杂背景,对比分布式协作专家系统工具BITAL-DEST,提出了面向对象的黑板集成模型.在此基础上,初步实现了系统的框架,以两种联系紧密的危重病为例,设计了由两个黑板模型集成的系统原型.运行结果表明,面向对象的黑板集成模型用于ICU医疗辅助诊断是可行的.     

知识系统建模框架研究

以PSM和本体为核心，构筑了知识系统建模框架，将知识系统结构要素分为需求本体、概念本体、方法本体、控制知识和解释知识，并用面向目标的黑板控制模型有效地将以上诸要素加以集成，将概念本体和方法本体溶入多主体的建模中．并探讨了本体维护和管理的方法．     

基于MAS的生产计划与控制系统研究

生产计划与控制是制造企业的核心问题,Agent技术是进行分布式制造系统建模的一种主要方法之一。文章针对多品种、小批量的订货生产型中小企业生产计划与控制的特点,提出了基于多代理系统的生产计划与控制系统模型,分析了该系统模型的运行模式,并对系统中MAS的框架应用结构以及多Agent的实现方式进行研究和探讨,有效地解决了生产计划的不可行问题。     

基于元模型的企业模型表达

为了促进不同建模方法所建模型之间的信息集成和共享,并解决目前各种建模技术和建模语言之间的差异所造成的多模型驱动系统集成的障碍,该文以模型驱动体系结构(MDA)思想为基础,从元模型层面提出图形层和概念层分离的建模软件开发思路,构建了以可扩展标记语言(XML)作为数据交换格式的通用企业建模工具系统框架,利用元模型描述相关建模方法的语法和语义.以IDEF3建模方法为例,验证了系统框架中元模型XML模式(Schema)的构建方法,通过元模型实现了模型之间的信息交互和共享.     

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-