高温作业环境中人的不安全行为实验研究

不良的作业环境不仅影响着工人的身心健康,降低劳动效率,同时还会影响人的不安全行为,使事故发生的可能性增大。通过实验测试个体在高温环境下生理、心理及动作稳定性的指标,定量分析了高温环境对人不安全行为的影响。分析结果表明:疲劳状态下人的注意力集中能力、反应能力、动作的稳定性都有所下降;高温环境使人的疲劳加重、心情烦躁,动作的出错率明显增加,是引起人不安全行为的一个重要环境因素。     

Estimation of carbon sinks in chemical weathering in a humid subtropical mountainous basin

The fluvial geochemistry of the mainstream and tributaries of the Zengjiang River was investigated,and the mass balance approach and deduction methods were used to estimate the uptake of atmospheric CO2 through rock chemical weathering.The results showed that the chemical runoff mainly consisted of HCO3-,Ca2+,Na+,and dissolved Si,and that silicate mineral weathering was significant,but carbonate mineral weathering was a minor source of dissolved loads in the Zengjiang River basin because of the low amount o...     

A Simplified Method to Calculate the Wet Bulb Globe Temperature(WBGT)

Wet bulb globe temperature(WBGT) is a comprehensive index obtained mainly from three pa-rameters:black globe temperature(Tg),wet bulb temperature(Tw),and dry bulb temperature(Ta).While in field observation and numerical simulation,black globe temperature and wet bulb temperature were not easy to obtain, so WBGT was difficult to measure and calculate directly.In order to solve this problem,air dry bulb temperature, wet bulb temperature,globe temperature,relative humidity,mean air velocity,solar radiation and wet bulb globe temperature were collected during the summer(July)in Guangzhou.Correlation analysis and regression analysis were used to get a simplified method to calculate WBGT.The results showed that dry bulb temperature,relative humidity,solar radiation and WBGT were interrelated to some extent.These three pa-rameters could be used in the simplified method to predict WBGT,and the linear correlation and precision of this model were high.In addition,we used the measured data to verify the simplified method,and the results showed that the error of the calculated value and the measured value was all below 5%,which means the simpli-fied calculating method is feasible and can be used in field observation and simulation research of urban thermal environment.