天津市社区和居家养老服务政策研究
毕业设计(论文)外文摘要Title Research on the Policy of Community and Home-basedEndowment Service in TianjinAbstractWith the acceleration of the aging process,and based onthe weake...
居民对绿色物流的认可度影响因素分析—以中山市为例
Analysis of influencing factors of residents'recognitionof green logistics --Taking Zhongshan City as an Example[Abstract]Since the beginning of the 21st century,with the developme...
中小企业融资问题探讨
Discussion on Financing of Small and Medium SizedEnterprisesAbstractNow,small and medium-sized enterprises are the main pillar of our economy.However,dueto various factors and its ...
100W直接甲醇燃料电池堆的设计
北京理工大学珠海学院2020届本科生毕业设计Design of 100W direct methanol fuel cell systemAbstractDirect Methanol Fuel Cell (DMFC)is a kind of proton exchange membrane Fuel Cell,which...
智慧冷链物流体系的构建研究—以苏宁为例
Study on construction of intelligent cold chain logisticssystem-Take suning for example[Abstract]In the era of Internet +people's life has become more and moreinseparable from the ...
彩色防滑路面涂层材料高低温性能评价
毕业设计说明书(论文)外文摘要Title Study on Gradation Design of Porous Asphalt Mixture and TestAbstractColor non-slip road surface is a kind of resin-based road surface non-slip t...
输送产品卷扬(含小车)性能分析与研究(开题)
机的状况。美国生产卷扬机的厂家有近百家,主要有贝波(BEEBE)国际有限公司、哲恩(THERN)有限公司等。手动卷扬机的主要品种有:直齿传动卷扬机、蜗杆传动卷扬机:电动卷扬机的主要品种有:蜗杆传...
方形气固湍动流化床中的动力学行为研究
四川大学博士学位论文静床高度对转变速度、局部颗粒浓度和局部颗粒速度都有影响。随着静床高度增加,床层轴向各截面转变速度表现出同步增加。静床高度越大,局部颗粒浓度和局部颗粒速度的分布越...
基于杜邦分析法下吉利汽车盈利能力分析
安徽新华学院2023届本科毕业论文(设计)Profitability analysis of Geely Auto based on DuPont AnalysismethodAbstractChina's economic development has gradually changed from high-speedd...