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As applications of Riemannian surface and algebraic curve theory in integrable system, Abel-Jacobi coordinates are introduced suitably by the Lax matrix, from which straightening out of the flows are given.

作为Riemann面和代数曲线理论在可积系统中的应用,利用Lax矩阵合适地引入Abel-Jacobi坐标,使得对应的流拉直。

Asapplications of Riemannian surface and algebraic curve theory in integrablesystem,Abel-Jacobi coordinates are introduced suitably by the Lax matrix,from which straightening out of the flows are given.

作为Riemann面和代数曲线理论在可积系统中的应用,利用Lax矩阵合适地引入Abel-Jacobi坐标,使得对应的流拉直。

On this basis,the PDC bit's fivepoint survey theory is developed,and a series of formulas are derived,applying PDC bits' geometry and analytic space geometry.

在此基础上,运用PDC钻头几何学和空间解析几何学中的四点共面、行列式、坐标变换的知识,提出并推导出了PDC钻头的五点测绘理论及系列公式。

Nevertheless, the laminated shell model with variable thickness and material properties can be employed to approximate the tire of composite construction.

以轮胎的内轮廓曲面为参考面,用正交曲线坐标描述轮胎的几何变形。

Transparent di splay pattern of 3-d us imaging were used to observe the solid lesions in solid organs.

采用三维超声断面投影冠状面重建技术,显示人体内多种目标体的冠状面及其在立体数据盒内的坐标位置。

In the numerical study, the governing equations of flow and heat transfer in 3 —D body—fitted curvilinear coordinate system being automaticly generated with TTM method were deduced by means of vector and tensor analysis. These equations were dliscreted with nonstaggered grids providing relative elimilating method for the pressure oscillation was domonstrated.

在数值分析中,借助于矢量理论和张量分析,导出了具有普遍意义的三维任意曲线坐标系下的流动传热控制方程,并利于TTM方法生成了计算域的贴体曲线坐标网格;在数值离散过程中,尝试了用非交错网格离散的方法并解决了压力场振荡的抑制问题;运用附面层理论,阐述了壁面函数法在三维任意曲线坐标系上的应用。

The one-dimension Terzaghi consolidation differential equation with boundary conditions,in which the top is drainable and the bottom is undrainable was solved,and the solutions obtained from several different references were analyzed.

解答了顶面不排水、底面排水边界条件下的太沙基一维固结微分方程,并比较分析了不同坐标系统下、不同边界条件下的单面排水太沙基一维固结微分方程的解答。

Research on the Basic Kinematics-Geometry Theory and Tool Positioning Strategy for 5-axis NC Machining;2. The paper introduces the construction features of undevelopable ruled surface integral impeller and two 5-Axis numerical control mill machining methods of vane shape which are "line contact" and "point contact".

文章介绍了不可展直纹面型整体叶轮的结构特点及五坐标数控铣削加工叶片型面&线接触&和&点接触&两种方式,分析了采用侧铣加工产生误差的原因,对加工中的不同工步及精加工薄叶片的特殊处理进行了分析,并提出了相应的解决方案,对整体叶轮的数控加工有一定的现实意义和实用价值。

In order that the digital tooth surface model can be used in design of hypoid gear, based on the discrete tooth surface points obtained by computerized simulation, a mathematical model is established by non-uniform rational B-spline polynomial and it can be employed in the processes of designing,manufacturing and measuring.

为了能将拟合齿面模型用于准双曲面齿轮的设计,采用加工仿真方法获得了齿面上离散型值点坐标数据,完成了齿面非均匀有理B样条的曲面拟合。

Compared with traditional method by solving a Jacobi matrix, calculating account is greatly decreased because only displacement and center of buoyancy need computing while those elements of waterline plane are not required.d Based on the research mentioned above, the paper presents the computer programmes of compartment definition, free surface effection, and some modules of the programme of the intact and damaged stability calculation.

与传统的拉格朗日乘子法相比,该优化方法公式推导简单,而且每次迭代只需计算水线面以下的排水体积和浮心坐标,不需计算水线面上的面积、漂心、惯性矩等要素,计算方法直接简便。 4在以上理论研究的基础上,开发了舱室定义,自由液面修正的计算机软件;编制了船舶完整、破损状态下的浮态、稳性计算的部分模块。

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It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发,分析对称连杆曲线上鲍尔点的产生条件,提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品,年生产总值3000万美元,产品价廉物美、选料上乘、质量保证,深受国内外客户的青睐

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。