查询词典 parameterization

Finally, the experimental results show that the approximation methods are correctness and effective. As an application, generating quasi arc-length parameterization of PH curves is also discussed.

最后通过具体逼近实例验证了文中算法的正确性和有效性，同时给出了它在PH曲线准弧长参数化中的应用。

As an application,generating quasi arc-length parameterization of PH curves is also discussed.

在CAGD中，曲线曲面一般用多项式或有理多项式表示，因此求解多项式函数的反函数是CAGD中的一个基本问题，它在曲线的准弧长参数化、曲线隐式化、曲线求交等问题中都有非常重要的作用[1-2]。

It make use of three-dimensional CAD parameterization designing technique to design and draw valve body mainly, and offer the database administration module of project, for finishing valve body casting technological design.

主要利用三维CAD参数化设计技术来设计绘制阀体，并提供工程数据库管理模块，以便完成阀体铸造工艺设计。

And it includes systematic introduction on how to make a parameterization design program that can be called by Pro/E with the help of VC++ platform and Pro/ Tookit which is the secondary development tool- bag ...

文中还系统地介绍了如何利用VC++平台及Pro/E的二次开发工具包Pro/Toolkit开发出能运行于Pro/E环境下的零件三维模型的参数化设计程序的总体思路和具体的设计步骤。

In order to develop and modify Gregory scheme for cumulus convective parameterization,we make the improvement as follows:(1) The large-scale moisture convergence is taken into account and the organized inflow,which occurs in the area of large-scale moisture convergence and is directly proportional to it, is added to turbulent airflow.(2) The influence on saturation vapor pressure exerted by supercooled water is taken into account and the initial mass flux is adjusted. Based on diagnosis of the air heating and moistening, the downdraft airflow is adjusted.(3) Based on the character of our country heavy rainfall,which usually occurs in the mixed cloud consisted of stratocumulus and cumulus, the process of excessive convection is restrained by organized outflow in the top of cloud and improving downdraft current and by reducing the evaporation of rainfall and release of latent heat.

为了改进和发展Gregory积云参数化方案，(1)考虑了大尺度水汽辐合对积云对流的影响，即在混合卷入中加入有组织的卷入，让有组织的卷入存在于有大尺度水汽辐合的层次上，并且与大尺度水汽辐合直接成比例；(2)考虑了过冷水存在对饱和比湿的影响，调整了初始的质量通量，并且根据对大气加热加湿的诊断，调整了大气向下拖曳的强度；(3)根据我国降水多由层状云和嵌入其中的对流云混合产生的这一特点，对于过强对流过程进行抑制，在云顶加入有组织的卷出，同时加大向下拖曳的强度，减少蒸发以降低潜热的释放，抑制过强对流的发生。

Traditionally ellipsoids and hyperboloids are modeled as implicit surfaces or through the use of rational surface schemes. The existing methods for generating spheres or quadrics have shortcoming such as the rational parameterizations for these surfaces are non-uniform, the resulting scheme cannot represent these surfaces in their natural acr-length parameterization and the implementation of the scheme is complex.

长久以来，Subdivision方法对一些看似简单却又在计算机图形学中有着重要作用的曲线曲面的造型非常困难，即使是对简单的圆和球的生成也很困难，已有的一些生成球或二次曲面的Subdivision方法一般都有太复杂、不能自然弧长参数化或者计算量太大等缺点。

The rotation,form drag due to local topographic inhomogeneities,and weak but appreciablestratification are suggested to be possible sources for this discrepancy.The clas-sical wall-layer parameterization of the turbulent dissipation rate is found to holdwell for reversing flows,while modifications are needed for rotating flows.

分析表明，潮流的旋转、由局地地形造成的型阻以及水体的弱层化可能是上述差异产生的原因；3、经典的壁湍流理论以及湍封闭模型中经常采用的湍动能与其耗散率间的关系对于弱层化的往复型潮流是成立的，而在旋转型潮流中，壁湍流理论需要进行修正。

This method avoids the complex computing of cutting tri-prism in current methods by parameterization of surface triangulations.

该方法利用三角网格参数化在地层面三角网的基础上重建类三棱柱网格模型，避免了现有类三棱柱建模方法中切割三棱柱的复杂计算。

Thus designers can work on parameterization drawings forroll-passes of H-beam products.

这样，设计者便可以在集成环境下进行H 型钢孔型的参数化绘图。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。