国内外大学车辆工程专业人才培养情况分析

国外多所大学与国内高校的专业和课程设置情况有所不同,国外车辆工程专业人才培养既注重学生综合素质培养又满足学生个体发展需求,人才培养紧密结合企业与社会需求和科学研究,课程成绩评价方式多样化,人才培养服务体系比较完善。研究国外人才培养方案能为我国高校车辆工程专业以及其他工科专业的人才培养体系的改革和创新提供借鉴。     

中南大学学科布局及结构调整研究

学科结构及布局关系到高等学校整体功能的发挥和全局的发展 ,它直接影响人才培养的质量、规格、类型 ,关系到科研与创新能力和水平 ,最终影响到学校发展目标的实现。本文根据中南大学“综合性研究型大学”的发展目标 ,就中南大学学科布局和结构调整进行了研究。     

NUMERICAL SIMULATION OF FLOW OVER TWO CIRCULAR CYLINDERS IN TANDEM ARRANGEMENT

In this article,the 2-D unsteady viscous flow around two circular cylinders in a tandem arrangement is numerically simulated in order to study the characteristics of the flow in both laminar and turbulent regimes.The method applied alternatively is based on the finite volume method on a Cartesian-staggered grid.The great source term technique is employed to identify the cylinders placed in the flow field.To apply the boundary conditions,the ghost-cell technique is used.The implemented computational method is firstly validated through simulation of laminar and turbulent flows around a fixed circular cylinder.Finally,the flow around two circular cylinders in a tandem arrangement is simulated and analyzed.The flow visualization parameters,the Strouhal numbers,and drag and lift coefficients are comprehensively presented and compared for different cases in order to reveal the effect of the Reynolds number and gap spacing on the behavior of the flow.The obtained results have shown two completely distinct flow characteristics in laminar and turbulent regimes.     

坝址区垂直温度场及其水文地质意义——以湖北溇水江坪河水电站为例

江坪河水电站坝址区钻孔内分层水温随埋深增大而上升,钻孔孔底水温17.16℃~19.83℃为所处河湾地块岩溶地下水代表性水温,钻孔顶面水温15.88℃~16.30℃与河水水温15.81℃相近,反映了坝址区河水位比下伏岩溶水位高,部分河水下渗补给下伏岩溶水。通过比较得出,左岸ZK17与右岸ZK19一线,河水对岩溶地下水下渗补给比下游ZK79、ZK36地段强烈。分层测温这种简单易行的研究分析方法对具有复杂水动力场的同类型岩溶峰丛峡谷建坝有一定参考意义。     

多排队多服务台的服务系统病床安排优化研究

采用运筹学排队论原理对某眼科医院门诊病人的排队系统进行研究,本文提出各种眼科疾病病床设置的最佳值,并与医院现在的住院安排做对比,为医院的管理提供改进建议和科学的理论依据。该方法可以应用于其他疾病的病床安排。将该论理论应用于医院的病床安排是科学、有效的方法。     

计算机本科教育的实践教学模式研究

高校毕业生就业问题在金融危机下显得尤为突出,但问题本身由来已久,引发该问题的原因很多,笔者在本文中针对本科计算机教学模式与市场需求之间的矛盾进行分析,并提出几点建议,其中主要介绍NIIT模式对计算机本科实践教学改进的意义。     

River basin water resources management in China: a legal and institutional assessment

China's rivers face major challenges arising from social and economic development, particularly associated with pollution and over-abstraction. Although these issues vary significantly across the country, China has adopted a national, unified approach to manage water resources in a river basin context. This paper assesses the legal and institutional arrangements for river basin management in terms of decentralization and centralization. It considers the appropriate roles for the different levels of government, including providing for participation and integration across these levels. It proposes strengthening institutional development and capacity building in the future.     

Flow characteristics of the two tandem wavy cylinders and drag reduction phenomenon

This paper presents an extensive numerical study of 3-D laminar flow around two wavy cylinders in the tandem arrangement for spacing ratios (L/Dm ) ranging from 1.5 to 5.5 at a low Reynolds number of 1...     

吉沙水电站施工总布置设计

吉沙水电站为长引水式电站,主要由混凝土闸坝、水道系统和地面厂房等组成,根据枢纽布置特点及施工支洞布置方案,结合工程实际情况,并考虑其他因素,施工总布置采用集中与分散相结合的布置方式。经过施工实践检验,设计规划的施工总布置方案满足工程建设的需要。     

冷却孔复合角和排列方式综合作用对平板气膜冷却效果的影响

研究复合角和排列方式综合作用对平板气膜冷却效果的影响。采用数值模拟的方法,保持射流圆孔尺寸、间距及倾斜角不变,分别对四种孔阵的平板气膜冷却进行了流动和传热的分析。利用Realizable k-ε湍流模型,标准壁面函数边界处理和SIMPLE算法,分析速度、涡量、冷却效率,对比冷却孔复合角和排列方式综合作用对平板气膜冷却效果的影响。结果显示:复合角和叉排同时存在时可改善平板展向上的冷却效果,而在平板流向上对冷却效果的影响不明显。结合吹风比得出较优的孔排方式。