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换面     
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  auxiliary plane
     This paper has been analysed and compared the auxiliary plane method, shift projection plane method and rotative method with the graph, of which obtained the best method of simple facility, and proceeded analytic calculation.
     本文用图解对辅助平面法,换面法和旋转法进行分析比较,从中得出简易可行的最佳方法,亚进行解析运算。
短句来源
  exchanging plane
     The Method of Exchanging Plane for Once to Determine the Shortest Distance between Two Intersecting Lines
     一次换面法求交叉两直线的最短距离
短句来源
     There are several traditional methods for solving the shortest distance between two intersecting lines,but they must adopt the method of exchanging plane for twice.
     交叉二直线间的最短距离传统解法颇多,但一般都要采取两次换面
短句来源
  conversion surface
     The method of conversion surface has the merits of distinct conception and convenient application. But it is not able to solve if new projection surface was not right select.
     换面法具有概念清晰,便于应用的优点,但新投影面选择不当,就可能无法求解。
短句来源
  plane-change
     Application of the Projective Plane-change Method to a Spatial Concurrent Force System
     换面法在求解空间汇交力系中的应用
短句来源
     By aid of the projective plane -change method,this paper presents a livin g example of application to solving the problem o f equilibrium of a spatial concurren t force system by the use of graphic solution,and verifies its advantag es.
     借助于画法几何中换面法的思路和方法,本文介绍了采用图解法求解空间汇交力系平衡问题的应用实例,并证实了它的优点。
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  auxiliary plane
This solution belongs to the class of parameterized solutions characterized by the property that the partial derivatives of the mapping function are rational in the auxiliary plane.
      
This makes the present technique more advantageous than other techniques, which require first the determination of a fictitious auxiliary plane-strain problem through the solution of an integral equation.
      
Based on the free streamline theory the problem reduces to solving a mixed boundary value problem and a Hilbert solution for the inverse problem in the auxiliary plane is obtained.
      
The auxiliary plane was determined to fit the records, and the range of possible auxiliary planes is indicated by dashed lines.
      
The main problem with this technique is positioning of the auxiliary plane in a single-ray domain.
      
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  conversion surface
The configurations of the conversion surface for optically positive and negative crystals are investigated.
      
The GEOID99 model replaces the GEOID96 model as the primary conversion surface between NAD 83 ellipsoid heights and NAVD 88 Helmert orthometric heights.
      
During ground test and calibration, the LENA imager was found to respond to neutral atoms with energies well above its nominal energy range of 10-750?eV, up to at least 3-4?keV, owing to sputtering interactions with its conversion surface.
      
Improved determination of heights using a conversion surface by combining gravimetric quasi-geoid/geoid and GPS-levelling height
      
The best solution, based on the least-squares collocation, provided a conversion surface for the transformation of GPS heights into normal height in Norway with an accuracy of about 5 cm.
      
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  其他


On the base of how to define the conjugate rotative surface, in this paper we have presented and solved the problem of re-conjugate for the first time. This paper apply the methods of graphics and analytics. In the graphical method we have applied the synthetical projective translation which is a rotation should be applied in oonjunction with change the projective plane. In this method the straight line will be translate into a hyperbola, for any rotative surface can make it's re-conjugate rotative surface so...

On the base of how to define the conjugate rotative surface, in this paper we have presented and solved the problem of re-conjugate for the first time. This paper apply the methods of graphics and analytics. In the graphical method we have applied the synthetical projective translation which is a rotation should be applied in oonjunction with change the projective plane. In this method the straight line will be translate into a hyperbola, for any rotative surface can make it's re-conjugate rotative surface so long as it's equation or normal is given in this way. The re-conjugate of basic rotative surfaces such as the cylinder. cone and sphere are given by method of graphics and analytics. Finally, we may be applyed the theory to the design, machine and adjust of the oblique mill roller.

本文是在回转面的共轭回转面如何确定的基础上进一步提出并解决了共轭回转面的再一次共轭的回转面的确定问题.在图解法中应用了“旋转、换面综合投影变换法”,把回转面的轴线变换成一条双曲线.这样,对于任意回转面只要能给出它的法线,就可以很方便地作出它的复共轭回转面.文中给出了基本几何体(圆柱、圆锥、弧锥)的复共轭回转面的图解表示及其解析公式,并用复共轭回转面的理论对斜轧生产中辊型设计、加工、修磨以及轧机操作调整后各个几何参数的变化对产品几何形状的影响进行了详细的分析.

This paper has been analysed and compared the auxiliary plane method, shift projection plane method and rotative method with the graph, of which obtained the best method of simple facility, and proceeded analytic calculation. It makes shortest connective distance between two non-intersecting pipelines in space. From two sides of the shape and the number to be solved better

本文用图解对辅助平面法,换面法和旋转法进行分析比较,从中得出简易可行的最佳方法,亚进行解析运算。使空间两条不相交管路的最短连接距离在“形”与“数”两个方面得到较好解决。

The author introduced the primary Contents of "proiect alteration method, statel her viewpoints on teaching theory about it and pointed out the major role of auxiliary projecting method (plane alteration method) in graphical drawing in this papero She also gave her suggestions for renewing the system of teaching material abo-ve and made a comparision between two different drawing methods and established an own auxiliary projecting method starting with the projection of points on to two planes and thus having...

The author introduced the primary Contents of "proiect alteration method, statel her viewpoints on teaching theory about it and pointed out the major role of auxiliary projecting method (plane alteration method) in graphical drawing in this papero She also gave her suggestions for renewing the system of teaching material abo-ve and made a comparision between two different drawing methods and established an own auxiliary projecting method starting with the projection of points on to two planes and thus having turned the complicated teachings of graphical drawing into an easy understanding one. lt is no doubt that this will be helpful for students to broad their intelligence, foster the ability analyzing and handling technical problems in the future

本文论述了“投影改造”的基本内容及教学理论观点,着重阐述了辅助投影法(换面法)在“画法几何”中的重要作用,对现有教材中“投影改造”单独设章需进行改革和更新教材体系,提出了自己的观点。并总结比较了两种作图方法,建立了要从点的两面投影开始没立“辅助投影法”使“画几”的教学由繁到简、由难变易,对大力开发学生的智力,培养他们分析问题、解决问题的能力起了好的作用。

 
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