区域金融中心建设与青岛发展

金融业是经济系统的重要组成部分,也是一个国家和地区的重要战略资源,由于经济发展的非均衡性,各地的金融发展也呈现出明显的区域差异,因此要结合地区特点,建立区域金融中心,优化金融资源的配置。青岛不断上升的经济实力需要建立相应的区域金融生态环境,进一步优化投资环境,建立区域资本市场,将其打造成山东半岛的区域金融中心,增强山东半岛的整体实力。     

环境经济核算体系下我国进出口贸易政策研究

我国加入WTO之后,与其他国家的贸易不断增加,但是随之出现的环境问题越来越成为制约我国贸易发展的因素。因此,我国应该高度重视环境问题,重视研究环境问题对我国贸易的影响。对环境经济的核算即将环境污染给我们造成的总成本核算出来,有助于我们掌握环境污染成本的大小,从而帮助我国进出口企业出谋划策,寻找到一条有利于我国进出口贸易健康发展的道路。     

基于较详细机理的氢燃料内燃机排放特性研究

基于Converge软件建立了包含简化化学反应机理的氢燃料内燃机CFD仿真模型,研究了氢燃料内燃机缸内燃烧和NO生成机理。仿真结果表明,氢燃料内燃机缸内燃烧经历了椭球型火焰稳定传播和快速湍流燃烧两个阶段。氢气的燃烧非常迅速,在快速湍流燃烧结束时OH浓度迅速降低,出现温度和NO质量峰值,其后缸内温度逐渐降低,NO质量逐步减小。最终的排放取决于高温区域的峰值温度和NO分解时间。最高温度越高NO的质量峰值越大,降温越快则NO分解越少。采用EGR能降低最高缸内温度,低转速时NO分解充分,因而NO的排放较低。     

Semirigid analysis of extended end plate connections based on correlation and sensitivity

Traditionally, semi-rigid analysis of extended end plate connections is assumed to be deterministic parameters. Most of the moment-rotation models of the joint are determined by curve-fitting and statistically regressed with the test data. Parameters of these models have little physical meaning, and the effect of correlations in the parameters is neglected. This paper deals with a semi-rigid joint of extended end plate connections based on correlation and sensitivity analysis. A numerical study was carried out and the finite element analysis was validated compared with the experimental results. The relative moment-rotation model was concluded based on correlations in parameters and probabilistic sentivity analysis. The relationship between height and width of steel beam was partial correlation. The relationship between thickness of steel beam flange and thickness of steel beam web was also partial correlation. Height and width of steel beam, and distance of upper bolts to axle wire of steel beam section were important sensitive parameters for the extended end plate connections.