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基于智慧物流的餐饮外卖包装解决方案

包装学报 2024年第5期16卷 52-57页

作者：吕晶晶辽宁经济职业技术学院商贸学院辽宁沈阳110000

智慧物流背景下,餐饮外卖业务量激增,然而外卖包装问题频现。为了解决餐饮外卖包装给人们生活带来的困扰,运用实地走访调研、线上问卷调查和网络调查的方法,对餐饮外卖包装的材料、结构和回收利用情况进行调研。调查结果发现,餐饮外卖... 详细信息

智慧物流背景下,餐饮外卖业务量激增,然而外卖包装问题频现。为了解决餐饮外卖包装给人们生活带来的困扰,运用实地走访调研、线上问卷调查和网络调查的方法,对餐饮外卖包装的材料、结构和回收利用情况进行调研。调查结果发现,餐饮外卖包装存在法律法规不健全、包装缺乏安全性与个性化、材料缺乏环保性和协同监管监督薄弱的问题。结合智慧物流技术,从三个层面提出相关解决措施推动餐饮外卖包装向标准化、绿色化、智慧化转型升级。国家层面,健全法律法规和行业规范;企业层面,提高研发水平,完善外卖包装回收利用机制;消费者层面,增强环保意识,全链条协同监督。

关键词：餐饮外卖智慧物流包装解决方案

基于飞机观测的华北降水云系上升气流区微结构研究

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大气科学 2024年第2期48卷 431-444页

作者：王心怡牛生杰吕晶晶王元靳雨晨邬昊鹏南京信息工程大学气象灾害预报预警与评估协同创新中心/中国气象局气溶胶与云降水重点开放实验室南京210044 南京工业大学安全科学与工程学院南京211816 中国气象局旱区特色农业气象灾害监测预警与风险管理重点实验室银川750002

上升气流是成云致雨的基本条件之一。本文利用河北省2017年5月一次层积混合云的机载云物理探测系统测量资料,研究了云中上升气流速度分布,云微结构特征以及二者的相关性。结果表明:云中上升气流速度随高度呈抛物线型分布,云底部较小(0.7... 详细信息

上升气流是成云致雨的基本条件之一。本文利用河北省2017年5月一次层积混合云的机载云物理探测系统测量资料,研究了云中上升气流速度分布,云微结构特征以及二者的相关性。结果表明:云中上升气流速度随高度呈抛物线型分布,云底部较小(0.75±0.52 m s^(−1)),云中部最大(3.64±2 m s^(−1)),云顶部最小(0.32±0.29 m s^(−1));发现随高度增加,云中上升气流区内冰粒子形状依次以片状、针状、柱状为主;暖云上升气流区中,上升气流速度与液态含水量正相关,相关系数为0.61;强垂直气流条件下云滴数浓度、最大云滴尺度大于弱垂直气流相应的数值,强垂直气流云粒子谱更符合Г函数分布。

关键词：降水云系飞机观测上升气流区云微物理结构

Observational Study on the Supercooled Fog Droplet Spectrum Distribution and Icing Accumulation Mechanism in lushan, Southeast China

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Advances in Atmospheric Sciences 2019年第1期36卷 29-40页

作者： Tianshu WANG Shengjie NIU jingjing lü Yue ZHOU School of Atmospheric Physics Nanjing University of Information Science and Technology Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science and Technology Nanjing Tech University Key laboratory for Aerosol–Cloud–Precipitation of China Meteorological Administration Nanjing University of Information Science and Technology Wuhan Regional Climate Center

A fog monitor, hotplate total precipitation sensor, weather identifier and visibility sensor, ultrasonic wind speed meter,an icing gradient observation frame, and an automated weather station were involved in the observations at the lushan Meteorological Bureau of Jiangxi Province, China. In this study, for the icing process under a cold surge from 20–25 January2016, the duration, frequency, and spectrum distribution of agglomerate fog were analyzed. The effects of rain, snow, and supercooled fog on icing growth were studied and the icing and meteorological conditions at two heights(10 m and 1.5 m)were compared. There were 218 agglomerate fogs in this icing process, of which agglomerate fogs with durations less than and greater than 10 min accounted for 91.3% and 8.7%, respectively. The average time interval was 10.3 min. The fog droplet number concentration for sizes 2–15 μm and 30–50 μm increased during rainfall, and that for 2–27 μm decreased during snowfall. Icing grew rapidly(1.3 mm h-1) in the freezing rain phase but slowly(0.1 mm h-1) during the dry snow phase. Intensive supercooled fog, lower temperatures and increased wind speed all favored icing growth during dry snow(0.5 mm h-1). There were significant differences in the thickness, duration, density, and growth mechanism of icing at the heights of 10 m and 1.5 m. Differences in temperature and wind speed between the two heights were the main reasons for the differences in icing conditions, which indicated that icing was strongly affected by height.

关键词： cold surge microstructure of supercooled fog icing gradient observation growth rate of icing

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浅谈水利工程管理单位档案信息化建设

四川水利 2024年第2期45卷 178-180页

作者：石骁智吕菁菁肖皓天四川省长葫灌区运管中心四川内江641000

水利工程管理单位的档案管理具有成本高、周期长、管理离散性大的特点,为了提高水利管理效率,采用档案信息化建设的路径势在必行。档案管理信息化可以有效提高工作效率和精确性,实现档案信息的共享和传递,提高安全性和可靠性,避免常时... 详细信息

水利工程管理单位的档案管理具有成本高、周期长、管理离散性大的特点,为了提高水利管理效率,采用档案信息化建设的路径势在必行。档案管理信息化可以有效提高工作效率和精确性,实现档案信息的共享和传递,提高安全性和可靠性,避免常时损耗。水利工程管理单位应克服传统的信息化程度低的问题,通过数字化、电子化、网络化、智能化来驱动档案管理的提质增效,并更好地服务于水利行政管理的各项实务。

关键词：档案管理水利行政增效

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人工影响天气虚拟仿真实验及课程体系建设

实验室研究与探索 2024年第3期43卷 90-93页

作者：刘晓莉吕晶晶陆春松杨素英陈景华南京信息工程大学、中国气象局气溶胶与云降水重点开放实验室南京210044 南京信息工程大学大气科学与气象信息虚拟仿真实验教学中心南京210044

在“人工影响天气”的相关课程教学中,构建虚拟仿真实验教学平台有助于学生深入理解基础理论知识,并对实际业务操作及催化方案设计、优化产生感性认识。虚拟仿真实验教学突破了室内教学时空及仪器设备昂贵的局限性,解决了自然界中不能... 详细信息

在“人工影响天气”的相关课程教学中,构建虚拟仿真实验教学平台有助于学生深入理解基础理论知识,并对实际业务操作及催化方案设计、优化产生感性认识。虚拟仿真实验教学突破了室内教学时空及仪器设备昂贵的局限性,解决了自然界中不能对同一块云反复催化的实际困难,对云降水环境及人工催化过程高度重现,对理论教学体系及教学形式进行补充,完善了课程教学体系。此外,科技成果在教学和本科生科研创新活动的引入,进一步增强学生科技创新意识及学习兴趣,促进了科研创新型人才的培养。

关键词：人工影响天气虚拟仿真实验课程体系大气科学

Variability of Raindrop Size Distribution during a Regional Freezing Rain Event in the Jianghan Plain of Central China

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Advances in Atmospheric Sciences 2023年第4期40卷 725-742,I0015-I0018页

作者： jingjing lü Yue ZHOU Zhikang FU Chunsong lU Qin HUANG Jing SUN Yue ZHAO Shengjie NIU Key laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration Nanjing University of Information Science&TechnologyNanjing 210044China Hubei Key laboratory for Heavy Rain Monitoring and Warning Research Institute of Heavy RainChina Meteorological AdministrationWuhan 430205China Department of Physics University of AucklandAuckland 1010New Zealand

The characteristics of the raindrop size distribution(DSD)during regional freezing rain(FR)events that occur throughout the phase change(from liquid to solid)are poorly understood due to limited *** investigate the evolution of microphysical parameters and the key formation mechanisms of regional FR using the DSDs from five disdrometer sites in January 2018 in the Jianghan Plain(JHP)of Central *** is identified via the size and velocity distribution measured from a disdrometer,the discrete Fréchet distancemethod,surface temperature,human observations,and sounding *** the persistence of precipitation,the emergence of graupel or snowflakes significantly reduces the proportion of *** enhancement of this regional FR event is mainly dominated by the increase in the number concentration of raindrops but weakly affected by the *** improve the accuracy of quantitative precipitation estimation for the FR event,a modified second-degree polynomial relation between the shapeμand slopeΛof gamma DSDs is derived,and a new Z-R(radar reflectivity to rain rate)relationship is *** mean values of mass-weighted mean diameters(D_(m))and generalized intercepts(lgN_(w))in FR are close to the stratiform results in the northern region of *** the melting of tiny-rimed graupels and large-dry snowflakes are a response to the formation of this regional FR process in the JHP,dominated by the joint influence of the physical mechanism of warm rain,vapor deposition,and aggregation/riming coupled with the effect of weak convective motion in some periods.

关键词： freezing rain raindrop size distribution hydrometeor type classification microphysical characteristics lgNw-Dm distribution Jianghan Plain

Meteorological conditions of ice accretion based on real-time observation of high voltage transmission line

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Chinese Science Bulletin 2012年第4期57卷 812-818页

作者： Yue Zhou ShengJie Niu jingjing lü liJuan Zhao Nanjing Univ Informat Sci & Technol Key Lab Meteorol Disaster Minist Educ Sch Atmospher Phys Nanjing 210044 Jiangsu Peoples R China

Meteorological conditions during ice accretion on the 500 kV high voltage transmission lines and test cables are presented, together with a calculation of liquid water content (lWC). The data include meteorological observations and real-time ice accretion on the transmission lines of the central China power grid, from 2008 to 2009 in Hubei Province. Also included are observations of ice thickness, microphysics of fog droplets, and other relevant data from a nearby automated weather station at Enshi radar station, from January to March 2009. Results show that temperature at Zhangen tower #307 was correlated with the temperature at Enshi radar station. The temperature on the surface of the high voltage transmission line was 2-4°C higher than ambient air temperature, although the temperatures were positively correlated. Ice formation temperature was about -2°C and ice shedding temperature was about -2 to -1°C on the high voltage transmission line, both of which were lower than the temperature threshold values on the test cable. Ice thickness was significantly affected by temperature variation when the ice was thin. The calculated lWC was correlated with observed lWC, although the calculated value was greater.

关键词：高压输电线路气象条件实时观察积冰表面温度气象观测低定量涂布纸海冰厚度

Benzoyl cyanide, a general radical acylating reagent for photoredox-catalyzed benzylic site-selective acylation reactions

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Science China Chemistry 2024年第11期67卷 3833-3843页

作者： Zhaodong Zhu jingjing Wu Frontiers Science Center for Transformative Molecules Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs School of Chemistry and Chemical Engineering Zhangjiang Institute for Advanced Study Shanghai Jiao Tong University

Based on rational design, benzoyl cyanide, a well-known ionic acylating reagent, has been developed as a general radical acylating reagent for benzylic site-selective acylation reactions for the first time. Using visible-light photoredox-catalyzed single electron transfer(SET) and hydrogen atom transfer(HAT) strategies, two different direct benzylic C–H acylation reactions with high atom economy have been developed. This newly developed radical acylating reagent could also be used to achieve three component acyltrifluoromethylation of styrenes, which is usually challenging to achieve by other means. All of these reactions proceed under mild nickel-free and NHC-free conditions with high functional group tolerance. In addition, based on our detailed mechanistic experiments, the process of radical-radical cross-coupling mechanism was suggested for these transformations.

关键词： photoredox catalysis benzylic C–H acylation radical acylating reagent HAT catalysis acyltrifluoromethylation

Effectiveness of Chinese herbal medicine for primary Raynaud's phenomenon:a systematic review and Meta-analysis of randomized controlled trials

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Journal of Traditional Chinese Medicine 2020年第4期40卷 509-517页

作者： Zhang Jinchao Hu Jing He Xiujuan Meng Yujiao Chen Guangkun Chen Zhaoxia lu jingjing li Ping Beijing Hospital of Traditional Chinese Medicine Affiliated to Capital University of Medicine Sciences Beijing 100010China Institute of Acupuncture and Moxibustion China Academy of Chinese Medical SciencesBeijing 100700China Institute of Information on Traditional Chinese Medicine China Academy of Chinese Medical SciencesBeijing 100700China

OBJECTIVE:To evaluate the effectiveness of Chinese herbal medicine for primary Raynaud's phenomenon(PRP).METHODS:The Cochrane Central Register of Controlled Trials,PubMed,Chinese Biomedical literature Database,China National Knowledge Infrastructure,China Science and Technology Journal Database,and Wanfang Database were searched up to February 13,*** controlled trials(RCTs)on treatment of PRP with Chinese herbal medicine compared with placebo,blank control,lifestyle changes,or calcium antagonists were identified and *** quality of included trials was assessed using a risk of bias ***:Eight RCTs involving 674 participants were *** methodological quality of the included trials was generally ***-analysis of two trials showed that Buyang Huanwu Tang plus Danggui Sini Tang produced greater improvement in global symptoms than *** trial showed that Danggui Sini Tang and a self-composed Chinese herbal medicine decoction,respectively,produced greater improvement in global symptoms than nifedipine *** one trial,modified Danggui Sini Tang showed greater improvement in global symptoms and arterial peak systolic velocity compared with *** trial showed that Jiejing Tongmi Tang produced greater improvement in global symptoms,plasma endothelin,and plasma nitric oxide than cinepazide maleate ***,Jiejing Tongmi Tang did not produce a significant difference in skin temperature and peripheral artery blood stream drawing after cold pressor testing compared with cinepazide maleate *** of the trials reported frequency of attacks,duration of attacks,participant preference scores,or adverse ***:Chinese herbal medicine may have a positive effective on ***,owing to weak methodology,the benefits of Chinese herbal medicine for PRP are *** rigorously designed studies are needed to confirm these findings.

关键词： Chinese herbal medicine Primary Raynaud's phenomenon Systematic review Meta-analysis Randomized controlled trials