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Personal Thermal Management by Radiative Cooling and Heating

Nano-Micro Letters 2024年第8期16卷 225-267页

作者： shidong xue Guanghan Huang Qing Chen Xungai Wang Jintu Fan Dahua Shou School of Fashion and Textiles The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong 999077People’s Republic of China Future Intelligent Wear Centre The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong 999077People’s Republic of China State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment Guangdong University of TechnologyGuangzhou 510006People’s Republic of China Shanghai International Fashion Innovation Center Donghua UniversityShanghai 200051People’s Republic of China Research Centre of Textiles for Future Fashion The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong 999077People’s Republic of China Research Institute for Smart Energy The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong 999077People’s Republic of China

Maintaining thermal comfort within the human body is crucial for optimal health and overall *** merely broadening the setpoint of indoor temperatures,we could significantly slash energy usage in building heating,ventilation,and air-conditioning *** recent years,there has been a surge in advancements in personal thermal management(PTM),aiming to regulate heat and moisture transfer within our immediate surroundings,clothing,and *** advent of PTM is driven by the rapid development in nano/micro-materials and energy science and *** emerging research area in PTM is personal radiative thermal management(PRTM),which demonstrates immense potential with its high radiative heat transfer efficiency and ease of ***,it is less taken into account in traditional textiles,and there currently lies a gap in our knowledge and understanding of *** this review,we aim to present a thorough analysis of advanced textile materials and technologies for ***,we will introduce and discuss the underlying radiation heat transfer mechanisms,fabrication methods of textiles,and various indoor/outdoor applications in light of their different regulation functionalities,including radiative cooling,radiative heating,and dual-mode ***,we will shine a light on the current hurdles,propose potential strategies,and delve into future technology trends for PRTM with an emphasis on functionalities and applications.

关键词： Personal thermal management Radiative cooling and heating Thermal comfort Dynamic thermoregulation

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Coordination of distinctive pesticide adjuvants and atomization nozzles on droplet spectrum evolution for spatial drift reduction

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Chinese Journal of Chemical Engineering 2024年第2期66卷 250-262页

作者： shidong xue Jingkun Han Xi Xi Zhong Lan Rongfu Wen xuehu Ma State Key Laboratory of Fine Chemicals Liaoning Key Laboratory of Clean Utilization of Chemical ResourcesInstitute of Chemical EngineeringSchool of Chemical EngineeringDalian University of TechnologyDalian 16024China School of Fashion and Textiles The Hong Kong Polytechnic UniversityHong Kong 999077China China Tianchen Engineering Corporation Tianjin 300400China School of Energy and Power Engineering Dalian University of TechnologyDalian 116024China

Pesticide adjuvants,as crop protection products,have been widely used to reduce drift loss and improve utilization efficiency by regulating droplet ***,the coordinated regulation mechanisms of adjuvants and nozzles on droplet spectrum remain ***,we established the relationship between droplet spectrum evolution and liquid atomization by investigating the typical characteristics of droplet diameter distribution near the *** on this,the regulation mechanisms of distinctive pesticide adjuvants on droplet spectrum were clarified,and the corresponding drift reduction performances were quantitively evaluated by wind tunnel *** shows that the droplet diameter firstly shifts to the smaller due to the liquid sheet breakup and then prefers to increase caused by droplet *** the surface tension of sprayed liquid facilitates the uniform liquid breakup and increasing the viscosity inhibits the liquid deformation,which prolong the atomization process and effectively improve the droplet *** a result,the drift losses of flat-fan and hollow cone nozzles are reduced by about 50%after adding organosilicon and vegetable oil *** contrast,the air induction nozzle shows a superior anti-drift ability,regardless of distinctive *** findings provide insights into rational adjuvant design and nozzle selection in the field application.

关键词： Pesticide drift Spray droplets Particle size distribution Spray atomization Transport processes Adjuvants

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Rapid velocity reduction and drift potential assessment of off-nozzle pesticide droplets

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Chinese Journal of Chemical Engineering 2022年第6期35卷 243-254页

作者： shidong xue Jingkun Han Xi Xi Junyi Zhao Zhong Lan Rongfu Wen xuehu Ma Liaoning Key Laboratory of Clean Utilization of Chemical Resources Institute of Chemical EngineeringSchool of Chemical EngineeringDalian University of TechnologyDalian 116024China

The droplet velocity and diameter significantly affect both the spatial drift loss and the interfacial deposition behaviors, thus determining the ultimate utilization efficiency during pesticide *** the spatial velocity and diameter evolutions can reveal the mechanism of drift loss and guide to design regulation strategy. Here, we explored the spatial velocity distribution of droplets after leaving the nozzle by particle image velocimetry technology and particle tracking model, considering that the effect of nozzle configuration and the air velocity. It shows that all droplets decelerate rapidly with the velocity attenuation ratio ranging from 50% to 80% within the region of 200 mm below the *** spatial velocity evolution differences between droplets in crossflow are determined by the competition of vertical drag force and net gravity, and the drag force sharply increases as the droplet diameter decreases, especially for that smaller than 150 μm. Based on the spatial evolution differences of the droplet velocity and diameter, a functional adjuvant was added to the liquid for improving the diameter distribution. And the drift loss was significantly reduced due to the reduction of the proportion of easily drifting droplets.

关键词： Spray droplets Particle image velocimetry(PIV) Particle size distribution Multiphase flow Pesticide drift

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Depositional Environment and Origin of Inertinite-rich Coal in the Ordos Basin

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Acta Geologica Sinica(English Edition) 2024年第4期98卷 1064-1085页

作者： SHI Qingmin ZHAO Jun JI Ruijun xue Weifeng HAN Bo CAI Yue LI Chunhao CUI shidong College of Geology and Environment Xi’an University of Science and TechnologyXi’an 710054China Shaanxi Coal Chemical Industry Technology Research Institute Co. Ltd.Xi’an 710199China China National Logging Corporation Geological Research InstituteXi’an 710077China

Inertinite-rich coal is widely distributed in the Ordos Basin,represented by the No.2 coal seam of the Middle Jurassic Yan'an *** paper combined coal petrology and geochemistry to analyze the origin of inertinite,changes in the coal-forming environment and control characteristics of *** has shown that there are two forms of inertinite sources in the study *** typical fusinization,wildfire events also play a substantial role in inertinite *** are significant fluctuations in the coal-forming environment of samples at different *** samples were formed in dry forest swamp with low water levels and strong oxidation,which have a high inertinite content,and the samples formed in wet forest swamp and limnic showed low inertinite ***,the inertinite content of different origins does not fully correspond to the depositional environment characterized by dryness and *** inertinites were significantly influenced by climatic conditions,while pyrofusinite was not entirely controlled by climatic conditions but rather directly impacted by wildfire *** high oxygen level was the main factor causing widespread wildfire ***,the combination of wildfire activity and oxidation generates a high content of inertinite in the Middle Jurassic coal of the Ordos Basin.

关键词： inertinite-rich coal wildfire coal petrology geochemistry biomarkers depositional environment

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球型钢支座在建筑结构工程中的应用

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建筑施工 2005年第11期27卷 31-34页

作者：薛诗东上海市工程建设咨询监理有限公司 200092

对国产球型钢支座,为了满足承受大空间巨大上部荷载和变形的要求,通过计算校核、有限元分析和试验检测球型钢支座的受力及其变形情况,成功地在上海市浦东新区文献中心工程中应用。

关键词：球型支座承载力有限元分析变形

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Study of the Millimeter Microstrip Monopulse Antenna Array in the Dual-Sensor System

Study of the Millimeter Microstrip Monopulse Antenna Array i...

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2006 7th International Symposium on Antennas, Propagation and EM Theory

作者： Liu Yong , Sun Houjun,Lu Xin, Shi Lei, Yan Yong, Lu shidong, Chen xue Beijing Institute of Technology, Beijing 100081, China

The integrated design method of the millimeter-wave (Ka band) microstrip monopulse antenna array and infrared dual-sensor system is presented in this paper. The performance and structure of the sensor are optimized. Meanwhile, the simulated and measured results of the circular planar antenna with a IR aperture are also demonstrated, meanwhile the result improves that the infrared sensor also has effect upon the antenna array.

关键词： Study of the Millimeter Microstrip Monopulse Antenna Array in the Dual-Sensor System Sensor

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双液滴碰撞行为及调控机制的研究进展

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化工学报 2021年第5期72卷 2354-2372页

作者：赵峻逸薛士东韩敬坤温荣福兰忠郝婷婷马学虎大连理工大学化学工程研究所辽宁大连116024

双液滴碰撞行为广泛存在于雨滴形成、燃油喷雾、喷雾冷却、喷墨印刷、农药喷洒等自然现象与工业应用过程中,其碰撞结果会受到液滴参数及气相环境等因素的综合影响,研究双液滴的碰撞行为规律及调控机制一直是该领域的热点。结合目前双液... 详细信息

双液滴碰撞行为广泛存在于雨滴形成、燃油喷雾、喷雾冷却、喷墨印刷、农药喷洒等自然现象与工业应用过程中,其碰撞结果会受到液滴参数及气相环境等因素的综合影响,研究双液滴的碰撞行为规律及调控机制一直是该领域的热点。结合目前双液滴碰撞的实验进展和数值模型,将围绕着碰撞行为的主控因素与调控机制展开综述,具体介绍了碰撞参数、液滴理化性质、气相环境等因素对液滴碰撞行为的影响规律与调控结果,并展望了液滴碰撞理论及应用的发展趋势和方向。

关键词：流体力学液滴碰撞卫星液滴聚并两相流黏度

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维普期刊数据库

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农药雾滴空间运行中的变形特征分析

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化工进展 2020年第10期39卷 3870-3878页

作者：马学虎薛士东孙桐奚溪宋小沫赵峻逸兰忠郝婷婷辽宁省化工资源清洁利用重点实验室大连理工大学化学工程研究所辽宁大连116024

以化学农药雾滴的空间运行过程为背景,构建了二维气液相界面追踪模型,通过COMSOL Multiphysics系统地研究了雾滴特征参数及风速等多因素耦合下单雾滴在横向风场中下落时的形变特征。结果表明,雾滴的形变会受黏性力、表面张力等内部因素... 详细信息

以化学农药雾滴的空间运行过程为背景,构建了二维气液相界面追踪模型,通过COMSOL Multiphysics系统地研究了雾滴特征参数及风速等多因素耦合下单雾滴在横向风场中下落时的形变特征。结果表明,雾滴的形变会受黏性力、表面张力等内部因素和重力、曳力等外部因素的共同作用,外部作用力能够促进雾滴发生形变,而内部作用力阻碍雾滴的形变。雾滴的形变量随着雾滴尺寸和横向速度的增大而增大,随着动力黏度和表面张力的增大而减小;雾滴下落过程中的形变存在振荡周期,雾滴的形变周期随着雾滴尺寸的增大而增大,随着表面张力的增大而减小,但基本不受横向风速和动力黏度的影响。将雾滴的形变量、形变周期与韦伯数We、奥内佐格数Oh和雷诺数Re等量纲为1数进行拟合,可以预测雾滴的空间形变特性。研究结果对农药雾滴的空间飘移机理及其阻控技术的研发具有重要意义。

关键词：农药雾滴雾滴形变界面追踪雾滴飘移

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交直流受流系统在城际动车组中的应用设计

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铁道机车与动车 2017年第2期 14-16页

作者：符建民李仕栋薛莲敏中车唐山机车车辆有限公司产品研发中心河北唐山063035

根据城际动车组交直流受流系统的特点,分析了交直流受流系统和牵引系统的关系,并简要说明了交直流系统控制设计要点。

关键词：城际动车组交直流受流系统牵引系统

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农药药液物理性质对雾滴空间运行规律的影响模拟研究

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农药学学报 2020年第2期22卷 306-314页

作者：赵峻逸薛士东宋小沫兰忠郝婷婷马学虎大连理工大学化工学院辽宁大连116024

研究农药雾滴的空间运行规律及其影响因素,对减少飘移、保护环境及助剂开发都有重要意义。选取2%甲氨基阿维菌素苯甲酸盐(简称甲维盐)乳油,采用Euler-Lagrange离散相模型对雾滴空间运行过程进行数值模拟,分析了农药雾滴的空间运行轨迹... 详细信息

研究农药雾滴的空间运行规律及其影响因素,对减少飘移、保护环境及助剂开发都有重要意义。选取2%甲氨基阿维菌素苯甲酸盐(简称甲维盐)乳油,采用Euler-Lagrange离散相模型对雾滴空间运行过程进行数值模拟,分析了农药雾滴的空间运行轨迹。结果表明:黏度和表面张力对雾滴空间运行规律的影响主要作用于喷头出口处的雾化过程,雾化过程的结果决定了后续雾滴空间运行的轨迹和飘移率。药液黏度和表面张力越大,出口处大粒径雾滴所占的比例越高,雾滴的平均粒径和空间运行速率相应增大,在空间运行过程中停留时间缩短,飘移率降低。确定了标准条件下黏度和表面张力调控的适宜范围:黏度在0.001~0.01 Pa·s之间,飘移率为18.77%~12.67%;表面张力在0.042~0.060 N/m之间,飘移率为38.93%~24.40%。针对实际场景,提出了调控药液物理性质的具体方案:通过将2%甲维盐乳油的黏度和表面张力分别增大至0.01 Pa·s和0.060 N/m,可以分别将4 m/s和5 m/s风速条件下的飘移率降低18%和43%,从而有效降低了农药雾滴的飘移损失。

关键词：减量增效农药喷洒雾滴飘移数值模拟药液性质喷施优化黏度表面张力

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