参数化

Expert system, Discrete optimization, Parametrization, CAD

专家系统离散优化参数化 CAD

It is not ideal to design cone bit with ordinary CAD method owingto the complexity of the bit's structure, therefore a parametrization design method is presented.

牙轮钻头结构复杂，设计困难，使用普通的计算机辅助设计方法难以收到理想的效果。为此，研究了牙轮钻头参数化设计方法。

Secondly, the paper does research systematically on the basic theories of MDA, including MDA model architecture, Meta Object Facility, the mapping from metamodel to other formats and Common Warehouse Metamodel. The paper also analyzes detaily the definition, the basic rule and the characteristic of model transformation. Then a standard development flow based on MDA is put forward. The problems about parameterized mapping and partial round-trip engineering are discussed. From the discussion the most optimized method is pointed out.

其次，本文系统深入地研究了 MDA 建模体系、元对象设施 MOF、基于 MOF 的元模型到各种信息格式的映射和公共仓库元模型 CWM 等 MDA 基本理论，分析了模型转换定义、规则及其特征，提出了一个基于 MDA 的开发流程，讨论了在模型转换过程中的"参数化"映射问题和"往返工程"问题，并在多种解决方法中分析出最优解决方法。

This paper takes the small fish of Carangiform as the mimetic object. Through the bionics study to the principle of Carangiform"s propulsion, the robofish"s main body mechanism that has two degrees of freedom tail fin and single degree of freedom pectoral fin has designed. At the same time, the parameterized mathematical model of double-hinged propulsion system has established. The kinematics analysis, dynamics analysis to the propulsion process and preliminary hydrodynamics analysis to the tail fin and the pectoral fin have been completed. The dynamic equations to the propulsion system have been established.

本文以鲹科模式鱼类为仿生对象，通过对鲹科模式鱼类游动机理的仿生学研究，设计了两自由度的尾鳍推进机构及单自由度的胸鳍机构的机器鱼机械本体结构，建立了参数化的两关节尾鳍推进模式的数学模型，并对推进过程进行了运动学、动力学分析，建立了推进系统动力学方程，对尾鳍和胸鳍推进的水动力进行了初步分析。

Put the individual diversity and following behavior into account, with phototaxis and following behavior of two evacuation model parameter, produce the Ant Colony Algorithm Mathematical Model of High buildings pedestrian evacuation.

根据蚁群算法的基本原理及Ant-Density模型，综合考虑了火灾时期人员的个体差异和从众行为，利用信息素和禁忌表等指标将趋光趋众2个疏散模式参数化，建立了高层建筑人员疏散的蚁群算法数学模型。

The Optimization of pinacoid flow passage, which cant be realized by single parameterized technology, is figured out with behavioral modeling. By establishing the optimal characteristics, the complex and repetitive process of impeller design is turned into an automatic one.

利用行为建模技术解决了单一参数化技术无法解决的轴面流道的优化问题，将叶轮设计的大量重复、费时费力的一个复杂设计过程，通过优化特征的建立，变成了一个自动化的过程。

Based on parametric model of signal-multicomponent polynomial phase signal,a novel time frequency kernel is presented.

立足于信号的参数化模型—多分量多项式相位信号，提出了一种新的时频分布并给出了其构造方法。

In the computational methods of TPBVP, in order to reduce some difficulties involved in solving a TPBVP via adjoint variables, we discuss a direct method in which state and control variables are indirectly parameterized, The method employs a recently developed direct optimization technique that uses a piecewise polynomial representation for the state and control variables, thus converting the optimal control problem into a nonlinear programming problem, which can be solved numerically.

在数值解法中，为了减少解决两点边值问题共轭变量带来的困难，主要讨论了将状态变量和控制变量进行参数化的一种直接方法，这种方法采用了近段发展起来的使用分段的多项式来代替状态和控制变量的直接优化方法，然后最优控制问题就转化成可以用数值方法解决的非线性规划问题，使得迭代初值更加容易选取。

We first introduce the positive real spectrum function and bounded spectrum function then establish the parametrization of the power spectrum by the Levinson polynomials associated with the autocorrelation matrix of the output and bounded spectrum function.

首先引入正实谱函数的和有界谱函数的概念，利用正实函数和有界实函数理论，通过和过程自相关矩阵相关联的Levinson多项式和有界谱函数，建立了功率谱参数化的表达式。

The paper gives a overall of the current situation of the development of drill pipe power tongs in well at home and abroad at first, given the manufacture techonology.

本文运用的基于自顶向下设计思想进行参数化设计的方法，现已完成了"钻杆动力钳系列产品开发"的项目。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新