受湍流影响,室内通风环境下的烟羽分布表现出波动变化且不连续的特性;在一些角落处,较大的漩涡会产生长时间的局部浓度极值区;另外室内的障碍物也会改变烟羽的分布状况.因此室内有障碍通风环境下的机器人气味源搜索问题变得很复杂.本文...受湍流影响,室内通风环境下的烟羽分布表现出波动变化且不连续的特性;在一些角落处,较大的漩涡会产生长时间的局部浓度极值区;另外室内的障碍物也会改变烟羽的分布状况.因此室内有障碍通风环境下的机器人气味源搜索问题变得很复杂.本文提出了基于概率适应度函数的粒子群优化(Probability-fitness-function based particle swarm optimization,P-PSO)算法并用于多机器人气味源搜索.P-PSO算法的特点是采用概率而非确定数来表达适应度函数值.针对气味源搜索问题,P-PSO算法的适应度函数值由贝叶斯和变论域模糊推理估计的气味源概率表达.为验证提出的搜索策略,构建了对应实际边界条件的室内通风环境的烟羽模型.仿真研究证明了本文提出的P-PSO搜索算法用于解决气味源搜索问题的可行性.展开更多
In this study, the indoor environmental quality (IEQ) in air conditioned residential buildings in a dry desert climate is examined from the perspective of occupants via two aspects: thermal comfort and indoor air qual...In this study, the indoor environmental quality (IEQ) in air conditioned residential buildings in a dry desert climate is examined from the perspective of occupants via two aspects: thermal comfort and indoor air quality. The study presents statistical data about the domestic-occupant thermal comfort sensations together with data describing the indoor air quality in Kuwaiti residential buildings. With respect to the latter, the overall IEQ acceptance using two measurements namely: physical measurements and subjective information collected via questionnaires, was used to evaluate 111 occupants living in twenty five air-conditioned residential buildings in the state of Kuwait. The operative temperature based on Actual Mean Vote (AMV) and Predicted Mean Vote (PMV) was identified using linear regression analysis of responses on the ASHRAE seven-point thermal sensation scale and was found to be 25.2°C and 23.3°C, respectively, in the summer season. Indoor air quality (IAQ) with respect to carbon dioxide concentration level was compared with the acceptable limits of international standards, i.e. ASHRAE Standard 62.1 [1]. The proposed overall IEQ acceptance findings in residential buildings show CO2 concentration level between 909 and 1250 ppm. However, this may be considered a higher level of CO2 concentration, which may require increasing ventilation rate through window operation or mechanical ventilation.展开更多
文摘受湍流影响,室内通风环境下的烟羽分布表现出波动变化且不连续的特性;在一些角落处,较大的漩涡会产生长时间的局部浓度极值区;另外室内的障碍物也会改变烟羽的分布状况.因此室内有障碍通风环境下的机器人气味源搜索问题变得很复杂.本文提出了基于概率适应度函数的粒子群优化(Probability-fitness-function based particle swarm optimization,P-PSO)算法并用于多机器人气味源搜索.P-PSO算法的特点是采用概率而非确定数来表达适应度函数值.针对气味源搜索问题,P-PSO算法的适应度函数值由贝叶斯和变论域模糊推理估计的气味源概率表达.为验证提出的搜索策略,构建了对应实际边界条件的室内通风环境的烟羽模型.仿真研究证明了本文提出的P-PSO搜索算法用于解决气味源搜索问题的可行性.
文摘In this study, the indoor environmental quality (IEQ) in air conditioned residential buildings in a dry desert climate is examined from the perspective of occupants via two aspects: thermal comfort and indoor air quality. The study presents statistical data about the domestic-occupant thermal comfort sensations together with data describing the indoor air quality in Kuwaiti residential buildings. With respect to the latter, the overall IEQ acceptance using two measurements namely: physical measurements and subjective information collected via questionnaires, was used to evaluate 111 occupants living in twenty five air-conditioned residential buildings in the state of Kuwait. The operative temperature based on Actual Mean Vote (AMV) and Predicted Mean Vote (PMV) was identified using linear regression analysis of responses on the ASHRAE seven-point thermal sensation scale and was found to be 25.2°C and 23.3°C, respectively, in the summer season. Indoor air quality (IAQ) with respect to carbon dioxide concentration level was compared with the acceptable limits of international standards, i.e. ASHRAE Standard 62.1 [1]. The proposed overall IEQ acceptance findings in residential buildings show CO2 concentration level between 909 and 1250 ppm. However, this may be considered a higher level of CO2 concentration, which may require increasing ventilation rate through window operation or mechanical ventilation.
