未成年人贫困对个体健康、能力与就业的影响

未成年时期的贫困会影响个体的先天素质、营养摄取、生活环境及所能获得的医疗资源,不利于贫困个体的健康成长,会对其智力发育和受教育情况产生消极影响,并经由人力资本积累最终作用于个体成年后的身体健康、能力获得与劳动就业,使其在就业和生活中均处于弱势.国家与政府应加强未成年人贫困问题的研究,积极倡导社会抚养的理念,通过制定和实施完善的政策体系保障贫困未成年人的健康成长与发展.     

高技能人才短缺：一个专用性人力资本的分析框架

高技能人才的人力资本特性更多地表现为专用性人力资本。我国高技能人才短缺的主要原因是高技能人才的市场价值存在＂偏离＂,从而使投资风险加大;在高技能人才培养上的错位和一些体制性障碍也加剧了高技能人才的短缺。根据高技能人才的人力资本特征建立合理的技能人才人力资本评价体系,并合理配置政府、各类教育机构、企业和个人的资源,形成高技能人才人力资本投资的多元分担模式,进而构建高技能人才人力资本投资风险防范体系是缓解我国高技能人才短缺的可行途径。     

改善户式中央空调系统热稳定性的设计实例分析

在分析户式中央空调系统热稳定性影响因素的基础上,给出了改善系统稳定性的设计措施,并结合一个别墅户式中央空调系统设计实例,从系统热稳定性的角度进行了设计分析,还指出了改善户式中央空调变频机组系统热稳定性的其他措施,为设计舒适、节能的户式中央空调系统提供参考。     

广西中小企业成为优质融资载体的对策

广西中小企业一直面临融资难这一难题。企业先天存在不利于融资的因素是造成融资难的重要原因。解决融资难题,广西中小企业应通过规范公司治理结构、健全财务管理制度、建设信用文化、与银行等利益关系部门建立良好的关系以及创新融资观念等途径把自身打造成为优质融资载体。     

弹性管束换热器传热与阻力特性的实验研究

对弹性管束水-水换热器的传热与阻力特性进行了研究。主要分析了换热器在不同工况下的传热系数的变化规律;研究了弹性管束在管外流体和管内流体的共同诱导作用下,管外和管内对流换热的情况;并对管程和壳程的流动阻力损失进行了实验测量,得出了管程和壳程的阻力损失变化的规律,以及换热器管程阻力损失的计算方法。     

EXPERIMENTAL STUDY ON SEMI-OPEN HEAT PIPES AND ITS APPLICATIONS

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重庆抗战文化旅游资源与开发

二战时期,重庆作为战时中国的首都和盟军远东反法西斯指挥中心,成为国内外著名的历史文化名城,留下了丰富的抗战文化旅游资源.重庆的抗战文化旅游是都市文化旅游产品的核心之一.本文在分析开发抗战文化旅游资源的意义和分析极为丰富的重庆抗战文化旅游资源的基础上,提出了开发重庆抗战文化旅游资源具体对策和措施.     

Investigation of heat sink of endothermic hydrocarbon fuels

Endothermic hydrocarbon fuels are advanced coolants for high-temperature structures of spacecraft. No data of tested-cooling-ability of endothermic fuels have been broadly discussed in literature. In this work a high-temperature flow calorimeter was designed, and the cooling capacity of six different hydrocarbon fuels were measured. Experimental results showed that these hydrocarbon fuels have capacity for cooling high-temperature structures, and that the cooling capacity of fuel N-l can reach 3.15 MJ/kg, which can nearly satisfy the requirement of thermal management for a Mach 3 cruise aircraft, whose heat sink requirement is about 3.5 MJ/kg. The endothermic velocity of hydrocarbon fuels was also measured by the calorimeter.     

Revealing future research capacity from an analysis of a national database of discipline-coded Australian PhD thesis records

This article reports how statistical analyses of PhD thesis records can reveal future research capacities for disciplines beyond their primary fields. The previous research showed that most theses contributed to and/or used methodologies from more than one discipline. In Australia, there was a concern for declining mathematical teaching and research capacity. We decided to investigate the ‘hidden’ mathematics research capacity in PhDs outside of mathematics. Australian PhD records were re-coded with up to three fields. Records with mathematics as one of their codes were selected and analysed for their relationships to disciplines in their other codes. Triple-coding revealed ‘hidden’ mathematical research capacity that had previously been single-coded in another field had mathematics as one of their subsequent fields. Our findings have implications for policy and planning for mathematics in Australia, and multiple coding of PhD theses records enables analyses for other disciplines to be undertaken to show their research capacities.     

微通道内单相水流动与换热的特性研究

微通道传热技术是近几年发展起来的一门新兴的传热技术,具有传热效率高、结构紧凑等优点,是当前流动与传热研究的重要课题。运用计算流体力学程序(CFX)对环形微通道内单相水的流动与换热进行数值模拟,可以形象地描述出管内的流场和温度场,从中分析各种因素对流动与换热所产生的影响。