unsmooth

• The drag reduction of riblet biomimetic non - smooth surface is given out by numerical simulation with cfx . through analysis of velocity vector field and velocity fluctuation this article probe into drag reduction mechanism of unsmooth surface . through analysis of behavior of single microbubble and turbulent kinetic energy this article indicate drag reduction mechanism of microbuble
  对仿生非光滑表面减阻机理,采用流体力学分析软件cfx进行了数值模拟,通过对速度场、剪切应力、涡量的计算结果进行分析,得出了仿生非光滑表面减阻几种主要原因。
• ( 5 ) the maximum water level risen by the enclose tideland cultivation around the reservoir is 0 . 66m , the responding quality is 2000mvs , which heavily effect the environment around the reservoir . the reservoir " s water level is risen because cross section and flood canal become narrow , which caused by building dam , this makes groundwater unsmooth , drainage , even flow from a lower to a higher space and soil salinized
  66m ，且为2000m ’儿的常年洪水，对库区周边环境的影响较大，因打坝筑堤缩小过水断面和行洪通道造成水库水位进一步抬升，致使库区周边灌区地下水排水不畅，乃至倒灌，型成士地盐碱化。
• Secondly , after conforming the necessity of developing the venture capital , the paper analyzes such concrete issues of venture capital mechanism on current stage as , shortage of does not have perfect laws and rules , the narrow fund - collecting channel , the seriously short of fund , the irreasonable organization form of invest corporation , few specialists on investment , the low level of medi - agency , and the unsmooth exit way on the background of the exterior system environment
  其次，在明确了风险投资的发展必要性之后，以目前风险投资发展的外部体制环境为背景，从外部法律法规建设的不完善、资金募集渠道狭窄、资金严重短缺、投资公司组织形式不合理、投资专业人员缺乏、为风险投资服务的中介机构专业化水平较低以及投资退出渠道不通畅等多方面具体分析了目前我国风险投资机制相关组成部分存在的问题。