基于脉搏波的医疗诊断系统的设计与研究

随着社会的发展,人类的健康问题越来越得到重视,在各种病症人数急增的今天,医院的医疗设备已不能满足人们随时随地了解到自己身体状况的需求,拥有一个小型的可随身携带的监测医疗仪器已是势在必行。本文以计算机技术作为手段,通过传感器采集指端脉搏波信号,借鉴成熟的心电图分析方法,研究并设计了一套脉搏波医疗诊断系统,实现数据接收、存储、计算和分析一体化。     

基于乘客感受的沥青路面平整度评价方法

从道路使用者的角度对乘车舒适性与路面平整度之间的关系进行研究.以乘客的心电指标RMSSD(rootmean square of the squared differences of successive n-n intervals)为主要评价依据,选取平整度范围为1.06~5.53 m/km的12条沥青路面进行室外乘车试验.实验数据表明:不同速度下RMSSD随平整度的变化有明显的变化规律,同时结合主观打分法和振动加速度评价法,提出基于乘客舒适性的平整度临界值.     

The influence of polarized 3D display on autonomic nervous activities

The spectral analysis of Heart Rate Variability (HRV) can be used for assessing the autonomic nervous activities and further the physiological conditions of subjects. This study intended to explore whether or not people would have fatigue, faintness and other kinds of uncomfortable conditions after watching a 3D film by using HRV measures as the objective physiological indices, in addition to other subjective physiological indices.Twenty men aged 22 ± 2 experienced watching 3D films and 2D films and were served as the controls of themselves. As the controls, the subjects had to rest at the same place. All subjects were are randomized for taking different experiences, and the electrocardiographic (ECG) signals were recorded during the whole process. The researchers could obtain the indices of the autonomic nervous activities before and after experiencing 3D and 2D movies with the help of spectral HRV analyses, along with the objective physiological information. The subjects were requested to fill out the questionnaire for the subjective feelings after the movie experiences.It was found that the subjects’ high-frequency power (HFP) representing parasympathetic nervous activities decreases after watching a 3D film. The sympathetic and parasympathetic nerve activities before and after watching a 2D film were not significantly different. The subjects complained that they felt dizzy, had headaches, and got visual fatigue while watching a 3D film.This study found that the subjects’ parasympathetic nerve activities were reduced after watching a 3D film, indicating that watching a 3D film would make people uncomfortable and tired. This result was the same as that of the questionnaire. Thus, HRV analyses could be an objective physiological index for discomfort as viewing 3D films.     

不同天气状况下驾驶员驾驶工作负荷分析

为有效提高驾驶员在不良天气条件下的运行安全,针对晴天、中雨、中雨+雾(能见度100 m)和中雨+雾(能见度50 m)4种不同驾驶条件,利用心率变异性(HRV)指标,对驾驶员驾驶工作负荷特性进行研究.通过随机抽取3名驾驶员,在室内进行对于高速公路不同天气场景的仿真实验,对获得的数据进行统计分析发现,驾驶员在不同天气条件下驾驶工作负荷是有差异的,驾驶工作负荷随天气条件的恶劣程度增加,驾驶环境的能见度对驾驶员驾驶工作负荷影响最大.     

70例持续性房颤患者心率变异性临床分析

目的 探讨持续性房颤患者心率变异性(HRV)变化,分析其在基础心脏疾病伴房颤疾病中的临床意义.方法 70例持续性心房颤动患者作为房颤组,70例为正常对照组.行24h动态心电图检查,检测心率变异性时域指标.进一步将70例房颤患者分为孤立性房颤10例,冠心病伴房颤21例,高血压性心脏病伴房颤25例,心衰伴房颤14例.所有房颤患者均进行24h动态心电图监测,观察24h HRV时域分析指标.结果 房颤患者HRV时域分析较正常对照组下降(P＜0.01).冠心病、高血压性心脏病、慢性心衰伴房颤患者HRV时域分析指标较孤立性房颤患者明显降低(P＜0.01).结论 冠心病、高血压性心脏病、慢性心衰、伴房颤患者HRV降低,即自主神经对心脏的调节能力减弱.HRV可作为冠心病、高血压性心脏病、心衰伴房颤患者的无创性预测指标.     

啤酒泡沫蛋白质的初步分离及测定

研究了啤酒泡沫蛋白质的简便测定方法,发现Bradford法用于啤酒泡沫蛋白质的测定具有一定的可行性,测定结果与泡持值有着良好的线性关系。同时对啤酒泡沫蛋白质进行了凝胶色谱分离（Sephdex G-50),并得到了主要的三种泡沫高分子蛋白质。     

基于多因素噪声模糊综合评价方法的研究及应用

以往的噪声评价是基于A声级进行的,缺乏对人的心理和除听力以外的其它生理因素的考虑。因此,文章在传统的噪声评价研究的基础上,建立具有创新意义的由听力损失、心率变异和脑波组成的多因素噪声模糊评价系统,进行噪声对人体负荷综合影响的评价。经过标准噪声人机实验的验证分析,得到结论：多因素的评价方法较传统方法更符合实际影响情况。     

环境噪声对心脏影响规律的研究方法与实现

文章从工业环境噪声对人体心率影响的角度,研究噪声对人体负荷影响规律的方法及实现问题,并开发数据处理系统。在研究方法中,依据工业企业噪声现状选择声级、频率范围;采用能够反映微小变化的心率变异（HRV）作为评价指标,获得噪声对人体心脏的影响规律。该方法与系统实现强调影响劳动安全的人体心脏负荷问题,可从工程生理学与心理学双重角度更为全面科学地研究噪声的影响规律。