The list currently includes sources . list lines for fetching the latest kde packages for sid , joey hess bleeding edge packages , glark packages and various others . changes to debianhelp . in the first part of several planned 网站上最新的列表列出了想安装sid用的最新kde套件joey hess的实验性套件glark套件以其它各式各样套件要加到sources . list的设定。
Moreover , dr hess and his colleagues think it would be straightforward to attach their invention to more conventional optical devices , because at points where the core of the optical fibre is thick , it would behave quite normally 此外,赫斯博士与他的同事们认为,他们可以直接把他们的发明应用到一种更加传统的光学设施上,因为在光导纤维核心的厚处,光束能很正常的运行。
Since hess and smith invented panel method in 1962 , panel method has been widely used as a tool for potential flow calculations , such as one order panel method , high order panel method , b - spline and non - uniform rational b - spline based panel method ( nurbs ) 自从1962年hess和smith提出面元法以来,面元法已经被广泛用作为势流计算的工具,并且已经有了很大的发展。如一阶面元法、高阶面元法、 b样条方法及非均匀有理b样条方法等。
In the second part , firstly , the mathematical model for predicting hydrodynamic characteristics of varivec propeller under steady or unsteady condition are present , based on the general propeller lifting - surface theory , potential flow theory and green theorem . then , theoretical calculation methods for predicting hydrodynamic characteristics of varivec propeller designed above paragraphs are present , based on the finite basic solution method , the unsteady vortex lattice method and hess - smith method 在理论计算部分,本文首先基于常规螺旋桨升力面理论、势流理论和格林定理建立了定常和非定常状态下全方向推进器水动力性能计算的数学模型,然后利用有限基本解法、非定常涡格法和赫斯?史密斯方法对全方向推进器定常和非定常状态下的数学模型进行了数值离散,接下来针对前面所设计的全方位推进器进行了数值预报。
In the thesis the low drag - low noise optimization of the vehicle main form design is realized , main accomplishments are as follows . researched the knowledge of drag and flow noise , the parameters of the boundary layer are calculated by the hess - smith method and boundary layer momentum integral method . the calculation of the length of transition zone and change in boundary layer displacement thickness between laminar and turbulent states in the transition is improved , then the drag coefficient and self - noise from the transition zone are calculated as the objective functions of the optimization 主要研究内容和成果如下:对航行器绕流流场进行分析,深入研究了阻力和流噪声产生机理,建立了阻力系数和自噪声的评估数值计算模型;采用物面分布源汇法和边界层动量积分法对绕流流场的流体动力参数进行计算,改进了转捩区长度和边界层位移厚度的计算,应用于航行器头部驻点自噪声的计算;最后设计了阻力系数和自噪声数值计算程序模块。