AlMoON based solar selective absorption coatings were deposited on stainless steel substrate by magnetron sputtering.The coatings included infrared reflection layer Mo,absorption layer AlMoN,absorption layer AlMoON an...AlMoON based solar selective absorption coatings were deposited on stainless steel substrate by magnetron sputtering.The coatings included infrared reflection layer Mo,absorption layer AlMoN,absorption layer AlMoON and antireflection layer AlMoO from bottom to top.The surface of the deposited coatings is flat without obvious defects.The absorptivity and emissivity are 0.896 and 0.09,respectively,and the quality factor is 9.96.After heat treatment at 500℃-36 h,the surface roughness of the coating increases,a small number of cracks and other defects appear,and the broken part is still attached to the coating surface.A certain degree of element diffusion occurs in the coatings,resulting in the decline of the optical properties of the coatings.The absorptivity and emissivity are 0.883 and 0.131,respectively,the quality factor is 7.06,and the PC value is 0.0335.The coatings do not fail under this condition and have certain thermal stability.展开更多
商业地下停车场内部结构复杂、通道较窄,且相交通道视野范围小,驾驶员在寻找停车位时效率低且容易发生碰撞。以商业配建地下停车场为研究对象,基于驾驶模拟实验获取的微观驾驶行为数据,选取平均速度、平均加速度、制动位置对车辆操控行...商业地下停车场内部结构复杂、通道较窄,且相交通道视野范围小,驾驶员在寻找停车位时效率低且容易发生碰撞。以商业配建地下停车场为研究对象,基于驾驶模拟实验获取的微观驾驶行为数据,选取平均速度、平均加速度、制动位置对车辆操控行为进行分析,选取寻泊时间、路段通过时间、寻泊距离和最短路径选择对寻泊行为进行分析,并对不同驾驶风格的驾驶行为进行讨论。结果表明:对于车辆控制行为,停车信息诱导系统(parking guidance information systems,PGIS)可以重构抵近盲区交叉口的驾驶过程,使驾驶员平均速度降低36.90%,加速度降至2.55 m/s^(2)以下,对不同风格驾驶员平均速度的影响具有显著性。对于寻泊行为,PGIS可诱导驾驶员经最短路径到达目的地,有效减少寻泊时间;对保守型和普通型驾驶员的路段通行时间减少不显著,对激进型的路段通行时间具有显著影响。研究结果为车联网技术在城市交通领域的发展提供了新的视角。展开更多
基金Funded by the National Natural Science Foundation of China(No.52002159)the Open Foundation of Hubei Provincial Key Laboratory of Green Materials for Light Industry(No.201611B12)the Open Fund of Science and Technology on Thermal Energy and Power Laboratory(No.TPL2018A03)。
文摘AlMoON based solar selective absorption coatings were deposited on stainless steel substrate by magnetron sputtering.The coatings included infrared reflection layer Mo,absorption layer AlMoN,absorption layer AlMoON and antireflection layer AlMoO from bottom to top.The surface of the deposited coatings is flat without obvious defects.The absorptivity and emissivity are 0.896 and 0.09,respectively,and the quality factor is 9.96.After heat treatment at 500℃-36 h,the surface roughness of the coating increases,a small number of cracks and other defects appear,and the broken part is still attached to the coating surface.A certain degree of element diffusion occurs in the coatings,resulting in the decline of the optical properties of the coatings.The absorptivity and emissivity are 0.883 and 0.131,respectively,the quality factor is 7.06,and the PC value is 0.0335.The coatings do not fail under this condition and have certain thermal stability.
文摘商业地下停车场内部结构复杂、通道较窄,且相交通道视野范围小,驾驶员在寻找停车位时效率低且容易发生碰撞。以商业配建地下停车场为研究对象,基于驾驶模拟实验获取的微观驾驶行为数据,选取平均速度、平均加速度、制动位置对车辆操控行为进行分析,选取寻泊时间、路段通过时间、寻泊距离和最短路径选择对寻泊行为进行分析,并对不同驾驶风格的驾驶行为进行讨论。结果表明:对于车辆控制行为,停车信息诱导系统(parking guidance information systems,PGIS)可以重构抵近盲区交叉口的驾驶过程,使驾驶员平均速度降低36.90%,加速度降至2.55 m/s^(2)以下,对不同风格驾驶员平均速度的影响具有显著性。对于寻泊行为,PGIS可诱导驾驶员经最短路径到达目的地,有效减少寻泊时间;对保守型和普通型驾驶员的路段通行时间减少不显著,对激进型的路段通行时间具有显著影响。研究结果为车联网技术在城市交通领域的发展提供了新的视角。
