低温生物介电谱测试系统的研制及应用

本文利用ＭＣＳ－５１系列单片机成功地研制出了低温生物介电谱（ＣＤＳ）测试系统，实现了ＣＤＳ快速、动态的采集，解决了ＣＤＳ研究中的关键技术问题，使研究得以深入，并利用该测试系统研究了冻融速率对介电温谱的影响。     

不同磁共振层厚测试体模与测试方法的比较研究

目的：研究不同层厚测试体模和不同层厚测试方法对磁共振（MR）层厚测量结果的影响。方法：依据国际标准和国家标准研制4种不同的MR层厚测试体模，采用2种不同的测试方法分析其测量结果；将测量结果与进口体模进行比较分析。结果：通过Matlab程序分析得到测量结果，确定了MR层厚测试的影响因素，与理论分析结果基本一致。结论：4种层厚测试体模均满足MR层厚测试要求，使用斜板的测量方法更加简单易行，测量结果与进口体模更接近；通过倾斜校正方法可显著提高MR层厚测量精度。     

医学仪器设计中单片机实现RF无线通信的方法

1概述现代医学仪器设计中无线通讯技术越来越普遍,例如:无线心电传输、无线呼叫系统、无线中央监护系统等。本文主要针对采用单片机编程和通用RF无线通讯模块结合,描述3种不同方法的应用软件程序,通过模块从一个单片机到另一个单片机传送数据。这3种方法是:重复采样(Over sam-p     

传染病人负压隔离病床控制系统设计

通过实验,采用系统辨识方法获得负压隔离病床开环传递函数模型。据此模型,设计PID控制器,进行Matlab数值仿真,并优化控制参数。采用PT201型差压变送器测量负压,设计相应信号处理电路,建立以C8051F330为核心的单片机系统,实现信号采集、PID运算、键盘输入、液晶显示、风机驱动等功能。最后进行试验,验证控制效果。     

实验动物模型旋转监测仪的研制

介绍的动物旋转监测仪采用单片机技术，可通过四个测试通道，准确的自动检测和记录多种动物模型的旋转情况。根据各实验室的不同要求，本仪器提供了四种检测方式，并能对检测的推进行智能化处理。     

冠脉CT成像用心脏调搏仪的研制

本文阐述了一款以ATmega16单片机最小系统为核心模块的冠脉CT成像用心脏调搏仪的研制过程。该调搏仪主要由ATmega16单片机最小系统、调整设置按键、液晶屏、脉冲放大器、步进衰减器、输出驱动器、输出幅值检测电路、心电信号选通电路、电源供电电路等组成,可在对高心率且心律不齐的患者行冠脉CT成像检查时发出不同频率的刺激脉冲,同时消除刺激信号的尖峰,使患者心率稳定、心律整齐。测试结果表明,应用该调搏仪可以获得心率高度一致、心律整齐稳定的心电波形,可满足冠脉CT成像的要求。     

基于RF无线数据传输技术的近红外血氧监测仪的研制

针对血氧的无损测量，开发了一种无绳便携式近红外血氧监测系统。采用RF无线数据传输、单片机控制、PC机串日通讯技术．可进行一定范围内的数据信息采集、显示和储存，并实现了微型化和便携化。利用该系统对专业运动员进行了有氧负荷递增测试，得到运动过程中肌肉血氧相对浓度的变化趋势。结果表明该系统具有灵敏度高、抗干扰能力强、监测范围大的特点，有望用于对运动员训练效果和运动水平的评定。     

旋毛虫幼虫收集方法的探讨

介绍了用８０９８单片机为控制核心的智能化伏安特性测量系统的开发要点，包括硬件模入电路与单片机系统的设计、单片机的软件编程与程序设计技巧等，成果分析表明，采用８０９８单片机有着独特的优越性。     

智能化医用电气安全参数测试仪器的设计与实现

介绍一种采用单片机、高电压控制电路、继电器组合网络技术实现医用电气设备安全测试功能，用于测量医用电气设备的连续漏电流和患者辅助电流、电介质强度、保护接地阻抗等安全参数。适用于I类、II类、内部电源的B型、BF型、CF型等不同类型的医用电气设备的安全测试。     

基于Atmega64L的心率监测系统中MCU的设计

一种基于Atmel公司AVR系列单片机Atmega64L，用于心率监测系统中MCU的设计。简述了单片机的特性，以及外围接口电路和软件设计。该系统应用于单兵训练强度的心率监测系统，提高了系统的实时性和运算能力。     

虚拟化云桌面在医院信息化中的应用

目的提高计算机资源利用率,节约运营成本,实现快速部署、集中管理的目的。方法应用VMware View构建虚拟化平台,同时共享CPU、内存、网络连接和存储器等底层物理硬件资源,实现完整的虚拟桌面云环境。结果每一个用户都拥有自己的操作系统,同时可以实现精确的资源分配。结论提高了IT运维管理人员的工作效率,显著降低了运行管理成本。     

一种实验用炉温模糊控制器的设计

目的：研制一种基于模糊控制算法的高品质炉温控制器,用于生物医学实验室电炉的温度控制。方法：针对实验室电炉的开放式加热要求和大惯性、纯滞后、非线性、易受环境干扰的温控特点,分别对温控器软硬件设计,借助Matlab设计模糊控制算法．在Simulink仿真环境中设计仿真系统逼近实际系统的调控,并结合实践提出一种在线插值算法对稳态过程优化。结果：该炉温控制系统具有无超调和响应快的动态品质,在线插值弥补了单一模糊控制稳态效果的不足．实际控制效果与仿真结果基本一致。结论：该模糊控制器完全满足实验室电炉开放式的加热需求,有利于节约成本、提高热效率、降低能耗和改善实验条件,且安装使用方便,适合在生物医学实验室使用和推广。     

Time-space clustering of Vibrio cholerae 01 in Matlab, Bangladesh, 1970-1982

Growing evidence for the existence of an aquatic reservoir of Vibrio cholerae has led some observers to postulate the existence of two distinct modes of disease transmission: primary and secondary. In primary transmission vibrios pass from the aquatic reservoir to humans via edible aquatic flora or fauna, or drinking water. Secondary transmission consists of faecal-oral transmission from person-to-person and may spawn epidemics. Cholera outbreaks are particularly well documented for the Matlab area of Bangladesh, where a field station has been run since 1963, at which patients from a study population of nearly 200,000 are treated for diarrhoeal diseases and monitored in a longitudinal demographic surveillance system. This paper seeks to illuminate the process of secondary transmission by presenting preliminary results of an analysis of the time-space distribution of cholera cases in Matlab for the period 1970-1982. It is argued that the detection of time-space clusters of cases resulting from secondary transmission requires locational data below the level of the village, that is at the level of the bari, or patrilineally-related household group because this is where inter-personal contact is greatest. The mapping of the study area at the bari level is described briefly and it is argued that the proportion of all asymptomatic infections and cases which can be mapped is great enough to enable inferences about transmission processes to be drawn. Results of the analysis of time-space interaction using the Knox method are presented and provide some support for within-bari clustering of cases resulting from secondary transmission.(ABSTRACT TRUNCATED AT 250 WORDS)     

颈椎植入ACP后的三维运动实验测试研究

介绍了采用MTS生物：力学实验台与CCD三维运动测试系统相结合的方法．对两种颈椎前路固定系统，植入12具猪颈椎标本前、后颈椎各椎体的三维运动进行实验测试．并开发了相应的数据分析系统。经过实验验证．该方法可以评价颈椎前路固定系统的临床使用效果。     

What does the Matlab fertility experience really show?

The family planning program in the Matlab District of Bangladesh has been described in unique detail for more than 25 years and is regarded as a model for equally poor parts of the world. Its experience has been reported as showing the ineffectiveness of contraceptive saturation approaches and the prime importance of program management and especially of the selection of a special type of family planning household visitor, criteria that render family planning programs relatively expensive. This reanalysis of the Matlab experience suggests that there is inadequate evidence from which to judge the record of the saturation experiment and of family planning workers from less highly selected backgrounds. It is also argued here that the role of contraceptive choice and of access to different types of contraceptives, especially injectables, delivered to the door in this society of secluded women has been underestimated, and that too little importance has been attributed to demand in contrast to supply. While it is agreed that the Matlab demonstration has been of central importance in showing that fertility can be reduced in Bangladesh, it is argued that many developing countries can draw on this experience to provide less costly family planning programs with less emphasis on the managerial, top-down approach.     

基于光学识别及图像引导的胸部肿瘤放疗摆位系统的研究

目的开发一套摆位验证系统,以减少胸部肿瘤放射治疗病人的摆位误差,提高放疗精确度。方法在放射治疗摆位时将三个小金粒放置在病人骨性结构的表皮上,其位置呈三角形分布,此外,小金粒之间距离尽可能小,在Matlab 2010软件平台上自行开发一套摆位验证系统,采用图像配准的方式识别病人体表上预先放置的三个小金粒的位置,并计算出每个小金粒的二维坐标值(X,Y),以此作为量化放疗摆位误差的依据,指导技术员进行精确摆位校准。在本研究中,选取一例病人,对其8次放疗摆位时,校准前和校准后的小金粒坐标位置误差值进行比较分析。结果经过摆位验证系统的检验和校准后,金粒1在X轴方向的摆位误差dX1减少了4.5～7.3 mm,在Y轴上的摆位误差dY1的位置误差减少5.6～8.1 mm;金粒2的dX2位置误差减少5.6～7.8 mm,dY2位置误差减少5.7～7.8 mm;金粒3的dX3位置误差减少5.3～8.4 mm,dY3位置误差减少6.0～7.0 mm。结论通过使用自行开发的摆位验证系统,可使放疗摆位精度得到较大提高。但本方法的不足之处在于其目前还无法对因病人体型变化所造成的误差进行定量分析。     

Performance of the lot quality assurance sampling method compared to surveillance for identifying inadequately-performing areas in Matlab, Bangladesh

This paper compared the performance of the lot quality assurance sampling (LQAS) method in identifying inadequately-performing health work-areas with that of using health and demographic surveillance system (HDSS) data and examined the feasibility of applying the method by field-level programme supervisors. The study was carried out in Matlab, the field site of ICDDR,B, where a HDSS has been in place for over 30 years. The LQAS method was applied in 57 work-areas of community health workers in ICDDR,B-served areas in Matlab during July-September 2002. The performance of the LQAS method in identifying work-areas with adequate and inadequate coverage of various health services was compared with those of the HDSS. The health service-coverage indicators included coverage of DPT, measles, BCG vaccination, and contraceptive use. It was observed that the difference in the proportion of work-areas identified to be inadequately performing using the LQAS method with less than 30 respondents, and the HDSS was not statistically significant. The consistency between the LQAS method and the HDSS in identifying work-areas was greater for adequately-performing areas than inadequately-performing areas. It was also observed that the field managers could be trained to apply the LQAS method in monitoring their performance in reaching the target population.     

Profile of maternal and foetal complications during labour and delivery among women giving birth in hospitals in Matlab and Chandpur, Bangladesh

Worldwide, for an estimated 358,000 women, pregnancy and childbirth end in death and mourning, and beyond these maternal deaths, 9-10% of pregnant women or about 14 million women per year suffer from acute maternal complications. This paper documents the types and severity of maternal and foetal complications among women who gave birth in hospitals in Matlab and Chandpur, Bangladesh, during 2007-2008. The Community Health Research Workers (CHRWs) of the icddr,b service area in Matlab prospectively collected data for the study from 4,817 women on their places of delivery and pregnancy outcomes. Of them, 3,010 (62.5%) gave birth in different hospitals in Matlab and/or Chandpur and beyond. Review of hospital-records was attempted for 2,102 women who gave birth only in the Matlab Hospital of icddr,b and in other public and private hospitals in the Matlab and Chandpur area. Among those, 1,927 (91.7%) records were found and reviewed by a physician. By reviewing the hospital-records, 7.3% of the women (n=1,927) who gave birth in the local hospitals were diagnosed with a severe maternal complication, and 16.1% with a less-severe maternal complication. Abortion cases--either spontaneous or induced--were excluded from the analysis. Over 12% of all births were delivered by caesarean section (CS). For a substantial proportion (12.5%) of CS, no clear medical indication was recorded in the hospital-register. Twelve maternal deaths occurred during the study period; most (83%) of them had been in contact with a hospital before death. Recommendations include standardization of the hospital record-keeping system, proper monitoring of indications of CS, and introduction of maternal death audit for further improvement of the quality of care in public and private hospitals in rural Bangladesh.     

心电信号50Hz陷波器的FPGA实现

在心电信号（ECG）检测系统中,采集到的心电数据具有信号弱、频率低、干扰大的特点,特别是50Hz的工频干扰。本文根据IIR滤波器的原理,设计出用于抑制50Hz工频噪声的陷波器。利用Maflab对所设计的陷波器作性能仿真,并根据陷波器的参数编写相应的verilog程序,最后用QuartusII对硬件代码进行前仿真,仿真结果显示所设计的陷波器对50Hz工频干扰有良好的滤波效果。     

基于TMS320F2812的便携式心电监护系统设计

本文介绍了基于TMS320F2812的便携式心电监护系统的设计。心电采集电路实现了原始心电信号的放大和滤波,并具有导联脱落检测功能。信号处理电路以F2812为核心,采用模块化设计方法,实现数据存储、人机交互、串口通讯等功能,系统附加实时温度显示功能,更显人性化。心电处理软件包括Matlab辅助实现数字滤波、阀值法对QRS波群进行检测和自适应模板法进行心律失常初步诊断。