查询词典 parametrization

Based on the example of turbine reverse engineering , the general procedure that can be used to translate the physical object into CAD datum by Surfacer software is determined in this paper1 By going deep into the vector of point-cloud , it's parametrization can be gained by adopting the precept of accumulating chordal parametrization1 According to the principle of const ructing curve using the least square method , the high quality-curve can be gained by modifying curve's parameter1 This paper also empha2sizes on some methods about processing point-cloud , const ructing curve and const ructing surface1 And it can provide several methods to const ruct high quality2CAD model for mould machining1

此栏目为免费论文，可自行复制获取，如需要其他完整论文，可点击论文范文查找摘要本文就涡轮反求造型的实例，采用Surfacer 软件规划出由实物转化为工程CAD 资料的一般流程。在深入分析点云数据的矢量方向基础上，采用积累弦长参数化方案实现点云的参数化；根据最小二乘法曲线拟合原理，修改曲线参数获得高品质曲线；并重点论述了点云处理、曲线生成、建构曲面的方法，为模具加工提供了建构高品质CAD 模型的有效途径。

Here a simple technique for parametrization construction of 17/11 biorthogonal wavelet family is presented: first, the associated synthesis filter is formulated as one trigonometric polynomial represented by two free parameters; then the perfect reconstruction condition of the filter bank is reduced to one system of linear equations; finally the analysis filter is obtained by solving this system of linear equations. Thus, the exact free parameter expressions for the 17/11 biorthogonal wavelet filter banks are derived.

该文给出了一种参数化构造17/11双正交小波组的简便方法：首先把小波合成滤波器表示为用两个自由参数表达的三角多项式，然后把双正交小波的精确重构条件归结为一个线性方程组，最后求解此方程组得到对应的小波分解滤波器，从而得到了17/11双正交小波滤波器的参数表达式。

This article elabo rates the theory and method for realizing parametrization of the original design .In the DCL interface,graph data videotex has been realized by using standard th ree-dimension object model,stamp parameter has also been introduced.

本研究针对AutoCAD平台上的三维实体功能以及PDB管理功能的DCL技术，提出了利用标准结构的主要特征参数实现原型图的参数化方法。

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。

A feature model is set up first by Pro/E software based on the design feature of the bit, then by using Pro/Program tool, the parametrization design of the cone bit is achieved and the corresponding programs is worked out, which can promote the design efficiency and quality as well as decrease the design cost.

设计中，根据牙轮钻头的结构特点，用Pro/E软件建立特征模型，然后利用Pro/E的Program模块编程，采用数据文件与Pro/E模型交换数据，达到从特征模型中根据用户输入的参数而自动地在Pro/E中生成牙轮钻头的三维实体和二维加工图的目的，从而使设计人员从大量繁琐的绘图及计算工作中解脱出来。

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。

In the product design, uses modular, the parametrization 3D computer design system to carry on the modelling design, may personalize has custom-made, the image is lifelike, the effect is direct-viewing; On the production equipment, has provided the precise numerical control machinery, including the numerical control plate cutter, the numerical control knee bend machine, the numerical control key seating machine, the plasma cutter and so on, has the advanced working capacity; In the technical strength, has one batch of collection design, the manufacture, the installment is a body, experienced professionals.

在产品设计上，采用模块化、参数化的3D电脑设计系统进行造型设计，可以个性化定制，形象逼真，效果直观；在生产设备上，配备了精密的数控机械，其中有数控剪板机、数控折弯机、数控开槽机、等离子切割机等，具有先进的加工能力；在技术实力上，拥有一批集设计、制造、安装为一体，经验丰富的专业技术人员。

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。