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By introducing a parametric canonical transformation,Hamiltonian constraintequation in SO(3)ADM phase space is transformed into the parametric formin the Ashtekar phase space.

本文中提出了一个参数化的正则变换，将Palatini理论中SO(3)ADM相空间中的哈密顿约束方程变换到阿西特卡相空间，由此导出参数化的约束方程。

Combined with the design objects of the section and tendon curve in a prestressed concrete continual girder bridge, the establishment of parametric model and the redact of parametric drawing program are discussed. And the implementation of the three kinds of parameter-driven: variation-driven, table-driven and dimension-driven is put forward.

结合预应力连续梁桥中梁体截面和钢束曲线等设计对象的具体特点，讨论了参数化模型的建立和参数化绘图程序的编制方法，并提出了变量驱动、表驱动、尺寸驱动这三种参数驱动方式的具体实现。

The parametric uncertainty is considered to denote the uncertainty in structure,and both parametric form and unmodeled dynamics are used to represent the influences and mechanism of uncertainty in unsteady aerodynamic forces.

将结构的不确定性考虑为参数形式，非定常气动力的不确定性考虑为参数和未建模动态两种形式，建立了不确定系统的线性分式变换模型。

Characteristics of parametric design and implementation approach for parametric database establishment based on redevelopment of Pro/program is expiated and an actual case is presented.

介绍了参数化设计的基本原理，阐述了Pro/E参数化设计的特性及基于Pro/program二次开发实现参数化建库的方法，并给出了实例。

A parametric surface was reconstructed at a local area of each sample point, and a believing neighbor area was generated based on a given error. A new parametric surface was recomputed, and a larger believing area was generated. The surfel with largest believing area was reconstructed, and the original model was approximated by the surfel in an as large as possible local area.

该算法在每个采样点附近重建一个函数曲面，根据给定误差得到置信邻域，重新计算函数曲面，得到更大的置信邻域，如此反复迭代，产生一个具有最大置信邻域，并在更大范围内逼近原模型的面元。

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。

Structure of aero- engine case under the effect of combined axial pressure and end twist;2. The integration of CAD parametric modeling,finite element method,classical strength calculation theory with modern optimal design techniques produces a complete and systematic design procedure for performing parametric optimal design of turbine disk, engine case and turbine shaft.

开发了基于大型有限元分析软件Ansys的燃气涡轮发动机辅助设计系统，该系统将CAD参数建模技术、工程有限元数值计算方法、经典强度计算理论与现代优化设计技术相结合，实现了涡轮盘、机匣和涡轮轴典型零件的参数优化设计的完整设计流程，建立了结构优化设计平台；并通过机匣的结构优化设计实例，验证了燃气涡轮发动机辅助设计系统的有效性。

The relations of parametric equations with the route coordinates and the part coordinates are found out according to the curve model,the parametric equations of middle and side stakes in circular curve and easement curve are derived,thence the value of parameters is obtained,the solution procedure is got.

根据曲线模型，找出线路控制坐标系与局部坐标系坐标之间的参数方程关系，推出了缓和曲线及圆曲线中边桩坐标的参数方程，代入已知量求得参数的值，给出了求解步骤。

Stability of solutions of the cavitated bifurcation equation is discussed in each region by using the minimal potential principle, and the catastrophic phenomenon of cavity formation is explained. 2. In Chapter 4, problems of cavitated bifurcation for two spheres, which are composed of two different kinds of imperfect compressible hyper-elastic materials, were examined, respectively. The parametric analytic solutions of the radially deformed function and the parametric cavitated bifurcation solutions are all obtained for the two spheres.

利用奇点理论给出了空穴分岔方程在分岔点的等价正规形，将缺陷参数分成若干个区域，证明了当缺陷参数属于某些区域时，具有缺陷的超弹性材料球体发生空穴分岔时的临界载荷比无缺陷的小；并利用最小势能原理讨论了空穴分岔方程的解在各个参数区域内的稳定性，解释了空穴生成的突变现象。

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。

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。