多毛细管静电雾化研究现状

介绍单毛细管静电雾化和多毛细管静电雾化特性的研究现状,并分析多孔喷油器喷雾特性的研究对多毛细管静电雾化特性的研究的借鉴意义。提出了对多毛细管静电雾化的特性进行进一步研究的主要内容。     

Modeling pollutant transport in overland flow over non-planar and non-homogenous infiltrating surfaces

Pollutant transport in overland flow over surfaces with spatially varying microtopography,roughness,and infiltration was investigated using the diffusion wave equation and transport rate-based equation.The finite volume method in space and an implicit backward difference scheme in time were employed in the numerical solution of the 2D governing equations.The developed model was first tested against an analytical solution and an experimental study involving overland flow and the associated pollutant transport,subsequently a series of numerical tests were carried out.Non-point source pollution was investigated under spatially varying microtopography,roughness,and infiltration.The simulation results showed that microtopography and roughness were the dominant factors causing significant spatial variations in solute concentration.When the spatially varying microtopography was replaced by a smooth surface,the result was an overestimation of the solute rate at the outlet of the upland.On the other hand,when the spatially varying roughness was replaced by the average roughness and spatially varying infiltration rate by the average infiltration rate,the pollutant discharge at the outlet of the upland was not significantly affected.The numerical results further showed that one cannot ignore the spatial variations of slope and roughness when investigating the local pollutant concentration distribution.     

跑步参与者涉入程度对幸福感的影响:心理资本和流畅体验的链式中介作用

整合休闲涉入理论、心理资本理论、流畅体验理论等,检验心理资本—流畅体验的链式中介效应,在此基础上构建链式中介效应模型。采用成熟量表自编问卷,对305名跑步参与者进行调查。结果显示：跑步参与者涉入程度、心理资本、流畅体验均是跑步参与者幸福感的前因变量。三者对幸福感的直接影响均达显著水平（P<0.005）,跑步参与者涉入通过心理资本和流畅体验的中介作用对幸福感产生影响,且该中介作用包含3条路径,即心理资本与流畅体验各自产生的间接效应,以及二者共同产生的链式中介效应。研究揭示了跑步参与者涉入程度与其幸福感的关系及作用机制,深化了跑步参与者涉入对参与者自身影响的研究。     

住宅小区车位权属及流转制度的立法完善

我国物权法对住宅小区车位权属及流转制度的规定过于原则,在车位的权属确定、流转方式、登记等方面存在着立法缺陷,无法满足司法实践需要,必须通过修改物权法或者制定实施细则对其做出明确规定。     

铜的流动注射光散射法测定

利用自制的流通池,提出了流动注射分析与光散射光谱法联用的测定技术;探讨了铜的流动注射和光散射光谱测定工作条件,铜的线性范围为0～400μg/mL,检出限为3.266μg/mL,测定频率为48次/h;实验结果表明所建立的方法快速、所需的化学试剂少.     

Dependence patterns associated with the fundamental diagram： a copula function approach

Randomness plays a major role in the interpretation of many interesting traffic flow phenomena, such as hysteresis, capacity drop and spontaneous breakdown. The analysis of the uncertainty and reliability of traffic systems is directly associated with their random characteristics. Therefore, it is beneficial to understand the distributional properties of traffic variables. This paper focuses on the dependence relation between traffic flow density and traffic speed, which constitute the fundamental diagram （FD）. The traditional model of the FD is obtained essentially through curve fitting. We use the copula function as the basic toolkit and provide a novel approach for identifying the distributional patterns associated with the FD. In particular, we construct a rule-of-thumb nonparametric copula function, which in general avoids the mis-specification risk of parametric approaches and is more efficient in practice. By applying our construction to loop detector data on a freeway, we identify the dependence patterns existing in traffic data. We find that similar modes exist among traffic states of low, moderate or high traffic densities. Our findings also suggest that highway traffic speed and traffic flow density as a bivariate distribution is skewed and highly heterogeneous.     

Influence of baffle position on liquid sloshing during braking and turning of a tank truck

The influence of baffle position on liquid sloshing during the braking and turning of a tank truck was studied using a volume of fluid (VOF) model. The forces,their positions and weight distribution during braking and the forces and rolling moment during turning were calculated. The reliability of the calculation method was validated by comparisons with experimental results. The results showed that during braking,liquid splashes in the tank and the maximum forces and G (the ratio of weight acting on the front axle to the rear axle) are large when A (the ratio of the arch area above the baffle to the area of cross section)≤0.1. When A≥0.2,as the position of the baffle is lowered,the maximum of Fx (the force in direction x) first decreases then increases,and the maximum of Fy (the force in direction y) and G increase. During turning,liquid splashes in the tank and the maximum forces and M (the rolling moment) are large when D (the ratio of the arch area above the baffle to the area of cross section)≤0.2. When D≥0.3,as the position of the baffle is lowered,the maximums of Fy,Fz (the force in direction z) and M increase.     

谈项目的组织与管理

现代项目管理是一门综合的学科,是通过对项目方方面面的协调管理,而促进项目达到预期目标的管理手段,是通过管理人来做成事的方法论。现代项目管理所谈及的项目,是广义的项目,它涉及的范围非常广泛。     

我国企业现金流管理问题及对策探析

现金流量管理是企业财务管理的重要组成部分,顺畅的现金流是企业可持续经营的重要保障和有力支撑,因此,确立现金流管理在企业财务管理中的核心地位,将有效避免以利润为核心的管理给企业所带来的不利影响。我国加强企业现金流管理应采取以下措施：一是整合现金流与利润流管理,使二者趋向统一;二是建立操作性强的现金流管理体系,全方位管理企业的现金流;三是强化对现金流量的预算管理;四是完善现金流管理的监督机制;五是建立企业内部现金流管理模型。     

基于工作过程的“电子商务外贸流程”课程改革

本文针对当前高职电子商务外贸流程课程的发展现状和存在的问题,运用基于工作过程的课程开发模式,提出电子商务外贸流程课程的改革思路与措施。