心电向量图自动分析诊断系统

本文介绍了一个用于心脏疾病诊断心电向量图自动分析诊断系统。系统通过计算机对立体心电向量分解成的平面心电信号的分析，可以绘制出各环各面的心电向量图，并根据向量图可计算得出３８项指标和９９项常规参量，随即给出诊断报告．文章还阐述了数字滤波、基线漂移、波形识别和图形处理的实现方法。     

模糊神经网络在燃气轮机故障诊断专家系统中的研究与应用

针对故障诊断专家系统中自学习能力弱和不能描述模糊性知识的问题,提出了一种将模糊神经网络运用于故障诊断专家系统的研究方法,既可以使故障诊断专家系统根据事例和数据来学习新的知识和信息,又增强了系统描述模糊性知识的能力,使得诊断结果更加符合诊断工作人员的需要。最后以某型燃气轮机为研究对象,实现了快速、准确地诊断。     

基于专家系统的统计质量智能控制

统计质量控制是质量控制的基本方法之一 ,质量控制图作为统计质量控制中的一个重要工具在制造企业中得到了广泛的应用 在计算机辅助质量系统中 ,采用人工智能技术实现控制图的智能分析、诊断与控制有着非常重要的意义 文章论述了专家系统在统计质量控制中的应用 ,对基于专家知识的质量控制图选择、模式识别和分析 /诊断专家系统的实现技术进行了深入的剖析     

电梯远程监测及故障诊断专家系统

介绍了电梯计算机远程监测及故障诊断专家系统的设计思想、功能特点及软硬件构成．该系统采用分布式监测系统;故障诊断专家系统中采用框架知识表示形式,混合推理策略,具有知识获取能力,诊断过程解释功能．系统实现了电梯的远程实时监测,大大提高了故障诊断效率     

XYZ型心电向量数据处理系统

心电向量图(VCG)可以与心电图(ECG)互相补充,对某些心脏病的诊断具有独特的意义,因此,实现VCG自动分析已经受到人们的重视。本文是VCG自动诊断系统的子系统,其目的是完成心电及向量数据的预处理和特征提取,并给出数据处理报告。为此我们提出一系列实时图形数据处理的算法,如快速线性拟合算法,波形识别的结构方法,向量环分割、识别和参数计算方法等。本系统已在TRS—80微型机上实现。其处理算法对其它形状分析问题也具有应用价值。     

心室除极过程计算机模拟模型

建立了正常人心室的三维计算机模型,包括心室肌单元划分、心室肌单元电活动模型、传导系统、兴奋传播规律。从极化场出发导出了心室除极向量的数学表达式。运用上述模型、公式模拟了心室除极过程的心电向量图。     

MEC—100综合心电心音分析仪通过省级鉴定

由我校402教研室高延滨、冯伟兴等同志研制的MEC—100综合心电心音分析仪,6月16日在我校通过由省科委组织的成果鉴定.MEC—100综合心电心音分析仪具有多项诊断与监护功能.它能够长时间连续地监护病人的多路心电信号,自动诊断十二导心电图,自动分析病人的心向量图,同步输出多路心电心音信号,而且还具有电子听诊器和病例管理等功能.该仪器的主要组成有心电心音放大器、12位A/D转换电路、486计算机和激光打印机等.     

水轮发电机组振动故障诊断专家系统

本文提出一个基于知识库和专家系统技术的水轮发电机组振动故障诊断与咨询的专家系统。本系统应用关于水轮发电机组振动、振动试验、频谱分析和运行管理人员现场经验的知识,采用推理方法作出诊断,采用产生式专家系统结构,设计出一个推理控制程序。该系统由知识库、算法程序库和诊断咨询程序三个主要部分组成。程序的实现采用MACLISP语言,可在IBM-PC计算机上运行。     

AM-50型掘进机液压系统故障诊断专家系统原型的开发

本文全面论述了AM—50型掘进机液压系统故障诊断及维修决策计算机咨询服务系统——专家系统的研制过程。主要内容有:关于系统故障知识的获取与表示,故障知识推理方式与控制策略的选择,专家系统结构建造过程以及运行实例。此外还讨论了对故障知识模糊化因素的处理。     

基于知识的心电图自动诊断系统的设计

介绍了基于知识的心电图自动诊断系统的系统构成及设计过程中采用的关键技术.模拟了现实世界心电专家根据心电图进行诊断的思维方式,揉进了可能性理论和模糊理论的概念,同时又避免了复杂的推理过程.其心电图病理数据库由知识库和规则库两部分组成,采用数据库形式存储.推理诊断系统采用数据驱动的正向推理结合基于CF模型的不精确推理.推理诊断系统与知识库和规则库的实际存储内容没有必然联系,所以适用于诊断型的专家系统.     

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。     

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

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     

Journal of Donghua University ( English Edition) Contents of Volume 31

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