基于脑电的温度阶跃变化环境下的人体热舒适研究

热环境作为评价建筑物理环境的重要部分,影响着人的工作效率和情绪变化。不同环境温度下的脑电信号与人体主观投票相结合是一种评价热舒适的新方法。选取14名身体健康的成年人在人工气候室经历由低温15℃分别突变到18、24和30℃3个过程,通过快速傅里叶变换,将温度阶跃变化环境下测得的脑电信号转化为脑电频谱功率,与主观投票和额头温度相结合,进一步探究脑电各分区和各波段与热舒适的相关性。研究表明,额叶区频谱功率变化可作为人体热舒适的评价指标,频谱功率与热舒适显著相关,且随着舒适程度的增加而降低,当温度突变到接近人体中性温度24℃时,功率最低。同时发现与热愉悦情绪和注意力有关的额叶区θ波段功率随着舒适程度的增加而增加,当温度突变到24℃时,θ波相对脑电功率变化最明显,增加了约20%。     

跌倒防护机器人的用户接受度模型

跌倒防护机器人解决了老年群体由于跌倒造成伤亡的社会问题，为探究老年用户对其接受度问题，以基础技术接受模型为基础，将感知易用性、感知有用性、使用态度、行为意向、技术信任度、社会规范、个人创新意识、面子文化、舒适度9个变量纳入分析，提出12项假设，构建了跌倒防护机器人的接受度模型。通过李克特5点量表测量变量，并结合结构方程模型进行数学分析，探究变量间的相互作用关系。结果表明：9个变量之间的作用具有显著性，12项假设全部成立，跌倒防护机器人接受度模型具有较好的拟合性。可见，研究成果可以为进一步探讨跌倒防护机器人的设计、开发、推广和普及提供有效参考。     

冬季浴室中空气制暖和地面热辐射并用时的冷热感和舒适感

探讨改善冬季浴室温热环境的取暖方法,通过在空气制暖和地面热辐射同时作用下的被验者实验,分析浴室环境的热特性,比较被验者的冷热感、舒适感,分析不同取暖条件下的人体反应,探索冷热感不“冷”、舒适感“舒适”的适当取暖条件.阐明在适当的地面热辐射下,人体脚底部冷热感被改善的程度.     

随机路面下轮毂电机偏心对电动汽车平顺性影响

为了分析轮毂电机偏心对电动汽车平顺性的影响，建立了考虑轮毂电机质量和轮毂电机激励的电动汽车平面4自由度振动模型，推导出相应的状态方程和输出向量表示，确定了平顺性评价指标.采用滤波白噪声方法建立了随机路面前轮激励，将Laplace变换和4阶对称Pade逼近相结合获得了随机路面后轮激励与随机路面前轮激励的关系，给出了典型的四相8/6极开关磁阻电机整体垂向激励的表示.实现了随机路面激励和轮毂电机激励的仿真，在B级路面上进行了4种工况的随机路面平顺性仿真和比较.结果表明，轮毂电机偏心对随机路面下电动汽车平顺性有着不可忽视的影响，设计电动汽车时需要考虑轮毂电机偏心引入的负效应.     

人体热舒适的模糊综合评判

人的热舒适受多种因素的影响，是一种模糊的随机变量，因而对人体热舒适的评判本身就是一个模糊的概念，笔者分析了影响人体热舒适的因素，并对其进行了简化，在此基础上，应用模糊数学的基本理论，提出了人体热舒适模糊综合评判算法。模糊综合评判解决了评判标度的连续化问题，从而减小了常规评判方法的投标的不确定性，还对模拟仿真结果进行了分析比较，仿真结果表明数值实验结果同预测平均投标指标事较好，为客观评价人体热舒适提出了一种方法和思路。     

Indoor Thermal Environment of Korean Rural Housing Yanbian Region of China in Winter

For the rural housing in Yanbian region in winter,the indoor thermal environment is bad but the energy consumption is high.And in order to solve the problem,the life particularities of the local residents,such as the inhabitation custom and the different living ways,were analyzed.The comfortable temperature felt by the local residents was surveyed and summarized according to different age's stage.The subjective comfortable tem-perature was calculated by using the thermal comfort formula set up by D.A.Mcintyre.The result shows that the comfortable temperature between the survey and the calculation is different.After analyzing the survey and the resdt ealculatiom,the range of local indoor comfortable temperature was given,which provides a reference basis for calculating the thermal comfort and energy efficiency as well as designing green rural houses.     

Thermal Comfort in Waiting Room at Railway Station in Cold Region in China

A field study and analysis about the thermal comfort was carried out in the waiting room at Bei-jing West Rail Station in Chinese cold region.Passengers'TSV(thermal sense vote) was obtained using statisti-cal method on the basis of more than 1200 questionnaires.The linear regression between TSV and indoor tem-perature indicates that thermal neutral temperature is 25.2℃.According to the percentage of satisfaction a-mong all passengers under different indoor temperatures,the acceptable temperature range in the waiting room is 24.2～30.2℃.It is also found that passengers'temporary stay should be taken into consideration for the ther-mal comlort analysis.Passengers'TSV is not a constant value after they enter the waiting room.In fact,△TSV increases as passengers are waiting for the train.and the growing rate is dependent on indoor-outdoor tempera-ture difference.The greater the temperature difference,the faster △TSV increases.At last, a linear regressionbetween indoor comfortable temperature and outdoor temperature was generated as the adaptive comfort model.