参数化

The method can decompose signal into linearity combination of a series of time-frequency atoms, and randomizes the parameters of atoms in the dictionary before each decomposition, which has high time-frequency resolution and parametrization of signal's microstructure.

该算法可将信号分解成一系列时频原子函数的线性组合，并在每次分解前自适应地初始化时频原子的参数，它具有较高时－频分辨率和信号微观结构的参数化表示的优点。

In order to assurance the maching accuracy and surface quality of steam turbine blades,based on typical CAD/CAM software Pro/Engineer 2.0,the flow diagram of parametric modeling and maching of turbine blades is drawn;The 3-D entity model of Steam Turbine Blade is upbuilt by parametric modeling method,and the fit-method with NURBS is extracted to smooth the curve surface,and the matrix expression of NURBS is deduced to make the surface more accurate;Then based on it's CAD model,the maching technology process...

为保证汽轮机叶片的加工精度和表面质量，以典型的CAD/CAM软件Pro /Engineer Widefire2.0中文版为基础，绘制了汽轮机叶片参数化设计加工的流程图；用参数化建模方法建立了叶片的三维实体模型，提出用NURBS曲线拟合方法进行光顺处理，并推导出NURBS的矩阵表达式便于截面型线的拟合，进而使叶片的造型更加精确；在CAD模型的基础上，分析了叶片的加工工艺流程，并用软件的CAM功能对叶片进行数控加工仿真，生成了NC代码。

Fully use the function of Pro/E parametric technology to achieve the three-dimensional parameterized modeling of involute helical gear with displacement angle.

充分运用Pro/E软件的参数化技术，实现渐开线角变位斜齿轮的三维参数化建模。

The ideas of object-oriented technology and parametric design computation are combined to construct this parametric design system of overhead crane based on object-oriented technology. The corresponding technology are fully used to design and compute partial mechanism of overhead crane. This system makes the devisers design convenient and design period is shortened, and in the meantime work efficiency is improved.

基于面向对象技术的起重机参数化设计系统结合面向对象技术和参数化设计计算的思想，充分利用各相关技术，对桥式起重机部分机构进行设计计算，方便设计人员设计，缩短了设计周期，提高了工作效率。

To accomplish the 3D model pattern plates for parts of the CM Super Micro Mill and engineering drawings based on 2D parts figures of the CM 31 Super Micro Mill.

2根据参数化设计方法和步骤建立了CM超细粉碎机参数化系统。

Then we introduce the parametrization of the equation of state of the dark energy and the reconstructions of three dark energy models - quintessence field, k-essence field, tachyon field.

然后介绍了暗能量物态方程的参数化以及利用参数化的物态方程重建的三个暗能量模型-quintessence模型、k-essence模型、tachyon模型。

The main tasks are finished in this paper;(1) Make use of the parametric technique to the 3D parametric model of roller sprockets.

本文完成的主要内容：(1)利用Autodesk Inventor的参数化技术建立了链轮三维参数化模型。

The essential structural mechanism and construction properties of Hoop Truss Deployable Satellite Antenna are investigated in this thesis.

摘要本文针对大型环形桁架可展开卫星天线这一具体天线结构，利用参数化造型技术获得天线展开臂和天线环形桁架的三维参数化实体模型，并对天线环形桁架进行了静力学特性分析。

According to the tobacco machine characteristic of serialized design, the research and implementation of parameterized process planning are presented.

针对烟草机械产品的系列化和参数化特点，对参数化工艺设计技术进行了研究和实现。

According to the tobacco machine characteristic of serialized design, the research and implementation of parameterized process planning are presented.

中文摘要：针对烟草机械产品的系列化和参数化特点，对参数化工艺设计技术进行了研究和实现。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。