基于虚拟仪器的心功能检测系统的设计

设计了一种基于虚拟仪器的具有心电采集和踏车控制功能的心功能检测系统.系统采用自行设计的数据采集卡来实现心电数据的安全测量和输出控制指令.数据采集卡由心电信号放大电路、信号采集电路、踏车控制电路组成,通过USB接口与PC机相连.系统软件采用LabVIEW编程语言,可实现数据库管理、心电波形显示、心电特征点分析、实时心率显示、ST段识别、踏车控制、数据即时存储、波形回放以及打印诊断结果等功能.     

便携式智能心电监护仪研究

针对心血管疾病的发病特点、以及国内普遍使用的心血管疾病检查仪器和手段的不完善，设计出有效的智能心电监护仪。本仪器可由病人在正常活动情况下长期携带，通过专用敏感元件，从人体连续取得心电信号送入监护仪的中央处理系统，通过与正常的心电信号比较，对心电数据实现实时检测、分析、有选择地记录，并具有重病报警等功能。为了降低功耗，减小重量和体积，采用了软件滤波，数据压缩存储等方法。该系统还可与上位机相联显示或打印出不正常的心电波形，供医务人员分析病情时参考。     

家用移动智能心电监护系统设计

心电监护是心脏病防御的重要依据,基于穿戴式传感检测和蓝牙技术,设计了一种家用移动智能心电监护系统。系统采用HKD-10L蓝牙心电传感器采集心电数据,发送到Android终端实时地画出心电图,基于特征点分析,进行心电异常诊断,通过网络将心电数据和诊断报告上传至云服务中心,方便日后查询与医生实时在线复诊。设备搭建方便,成本低廉,用MIT心电数据库进行测试,心电波形分析正确率达95.5%。     

微电脑控制的心电数据床边采集系统

介绍的微电脑控制的心电数据床边采集系统，具有心电数据的采集、存储和向计算机传送数据的功能。它与传统的心电数据采集系统相比，着重解决以下关键技术：以51系列单片机为核心的软、硬件结构；具有12位分辨率的多通道A／D采样、多路选择功能的高性能前置放大电路；实时高效的数据压缩算法等。系统性能稳定、使用方便，非常适用于心电数据的床边采集。     

上消化道动态多生理参数记录分析技术的研究

研制了１种新的用于上消化道功能疾病研究诊断的动态多生理参数记录分析系统．此系统借助置于体内的传感器导管和便携式记录盒，对胃酸、食道酸、心电进行２４ｈ动态连续记录监测，记录结束后，将数据传输给计算机进行分析．文章论述了传感器、记录器、数据分析等关键技术；给出了新研制的多参数集成的传感器导管的原理、结构及性能；介绍了记录器的结构和功能；讨论了数据分析、信号处理的方法和过程．胃液抽取法和动态监测法对照的动物实验证实了技术的可靠性．临床应用研究表明这项研究对非心源性胸痛等上消化道功能性疾病的研究诊断有着重要的意义     

基于分形盒维数检测QRS波群定位方法

应用分形盒维数检测理论，对心电信号的分形特征进行了研究，结果显示不同格子尺度下检测到的覆盖信号盒子数与格子尺寸之间存在密切的对数线性关系，这表明心电信号也具有分形特性。同时，研究过程中还发现当采用一个时间窗来对信号进行检测时，在心电信号中QRS波群位置检测到的分维较大。而且这种差异很显著。在这个发现的基础上，提出了基于分形盒维数检测的心电信号QRS波群定位方法，经实际应用表明该算法速度较快，并能有效去除干扰，可用于心电信号特征点的实时检测中。     

基于WIFI的心电实时监护系统

随着WIFI网络的日益普及,以及今后各大中型城市将实施的无线城市计划,本文提出了一种基于WIFI网络的心电数据实时传输系统,本系统采用无线连接模式,通过单片机采集并读取心电信号,进行模数转换后交给WIFI芯片,然后驱动WIFI芯片将心电数据上传至服务器,模块与服务器建立好Socket C/S通信模式,最终在服务器端软件上解析出心电波形,实现由WIFI途径实时的传输心电数据.     

基于SQL Server的矿井通风信息实时共享模块的设计

为了实现煤矿的安全生产及信息化管理,大多数煤矿安装了具有相应功能的系统,但各系统均存在信息量大、系统之间不能兼容、实时数据共享性差等不足.针对上述问题,提出了一种基于SQL Server的实现实时数据共享的方法.该方法首先设计、建立基于SQL的共享数据库,采用自定义存储过程,然后利用创建应用程序定时调用存储过程,实现了矿区安全生产监测监控系统数据与通风系统信息的实时共享.该方法具有可行性与实用性,可以实现系统的兼容、实时数据的共享、减小系统数据库的负担、增强系统可靠性.     

分布式局域网视音频监控系统

在分析局域网视音频数据多点传输特点的基础上，提出了视音频数据网络传输以及发送和接收的队列管理机制，设计了一套满足系统要求的数据包格式，并描述了接收队列模型。给出了系统的整体结构，以及各组成部分所承担的主要功能，对系统实时解码的原理、解码器的结构及其实现方法进行了讨论。采用分段存储和查询算法，实现了视音频数据的实时存储和精确到秒级的查询。性能测试结果表明，系统的稳定性得到了较大的提高。     

基于3G数据通讯的实时心电信号监护

根据3G网络传输速度快、准确性高的特点,提出了一种运用3G远程传输的心电监护模型.此系统基于C/S架构,监控终端将心电数据实时发送到监控中心,监控中心对病人进行实时监控,根据分析的结果给病人以及时的反馈.本文采用单导联心电采集器,预装有WINCE系统的ARM9嵌入式主板,串口蓝牙,3G模块等完成了从数据的采集、传输、存储到再现以及病人的信息管理的设计与实现,解决了大量心电数据的实时性传输问题.     

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

正~~