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几何形
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  geometrical shape
     under another condition, the load response has the character of stress relaxation, the fatigue specimens are disabled by reason of appearing macroscopical cracks but geometrical shape keep as the initial compressing status, compressing ratio amplitude is the independent factor influencing on fatigue life;
     在位移-载荷交互循环控制下,试样的载荷响应表现为应力松弛并由于出现穿透的宏观裂纹而失效,但其几何形貌保持为初始压扁状态,幅值压缩比是控制疲劳破坏寿命的独立参量;
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     Usually, there exist undercutting phenomena in helical groove milling process, which affect the accuracy and geometrical shape greatly.
     螺旋槽成形铣削时普遍存在根切现象,在很大程度上影响到加工精度和几何形 状。
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  “几何形”译为未确定词的双语例句
     In this paper, the multi-layers GaAs/GaAlAs LPE growth on the SI-GaAs terrace substrate with SiO_2 film is reported, and the affection of the thickness of the SiO_2 film for the crystallography is discussed.
     本文介绍了在半绝缘GaAs台阶衬底上用SiO_2作为生长掩蔽膜所进行的多层GaAs/GaAlAs液相外延生长(LPE),讨论了SiO_2膜的厚度对外延层几何形貌的影响。
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     The differential remnants deformations of the subgrade and track structures appear under the repeated load , it change the geometrical dimension of the subgrade and track structures.
     主要表现为轨道与路基结构在列车重复载荷作用下产生不均匀的残余变形,导致轨道与路基结构的几何形位、尺寸不断发生变化,产生各种不平顺。
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     The Evolution Research of the Decoration Characteristics of the Chinese Traditional Geometry Shape Emblazonment
     中国传统几何形纹样装饰特征流变研究
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     Experimental study on a new type of deep sea platform——Geometric Spar and Integrated Buoyancy Can
     一种新型深海海洋平台——几何形Spar和集成浮力桶的试验研究
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     (Ⅱ) Based on the internal comparability of macro topography and microcosmic real surfaces, DEM was introduced to tribology and used to describe microcosmic real surface. So a new way to describe tribological surfaces was supplied.
     (2) 基于宏观地表和微观真实表面之间的内在相似性,将规范的三维表面描述模型DEM方法引入摩擦学,实现了DEM方法对物体真实表面形貌的规范描述,为微观真实粗糙表面几何形貌描述提供了一种新的手段。
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     2. The geometric model of the geometric error evaluation is established.
     2.位误差的几何模型建立。
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     Analysis by Combining Graph and Algebra onDual Geometric Elements
     对偶几何元素的数分析
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     GEOMETRY IMAGINATION
     几何构想
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     The Geometrical Exposition of ■
     的几何描述
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     Shape * Shadow
     *影
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  geometrical shape
The results are given of numerical experiments (based on the method of large particles) that simulate the flow of a jet of ideal gas into a region of complicated geometrical shape.
      
The geometrical shape of the fractal structures observed experimentally can be described within the given mechanism, and their dimensionality can be estimated.
      
Geometrical shape resonances in multicenter systems with icosahedral symmetry: A controllable molecular trap for electrons
      
Variations of geometrical shape of woven and knitted specimens can be described by mathematical expressions of shortened epicycloids and Cassini ovals.
      
Meantime it is shown that the level of materials anisotropy can be decided on the basis of transformations of specimen's geometrical shape.
      
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On recording a number of SACP's of tungsten specimen successively tilted -to different orientations, some anomolous patterns superimposed on the general SACP's were observed at the exact positions of <111> direction, <001> direction, and <011> direction. These anomolous patterns are similar to Kossel patterns observed with transmission electron microscope. Moreover, the present patterns have two additional important characteristics. First, the intensity distribution of patterns changes with the electron energy...

On recording a number of SACP's of tungsten specimen successively tilted -to different orientations, some anomolous patterns superimposed on the general SACP's were observed at the exact positions of <111> direction, <001> direction, and <011> direction. These anomolous patterns are similar to Kossel patterns observed with transmission electron microscope. Moreover, the present patterns have two additional important characteristics. First, the intensity distribution of patterns changes with the electron energy (the electron accelerating voltage). Second, the geometric feature of the patterns can be used to represent some characters of the internal structure of the crystal. Finally, from the view points of the anomolous scattering effect, and the parameter a, which represents the interaction strength between the crystal potential. and the incident electron, the origin of the contrast of these patterns was explained qualitatively.

当钨试样倾斜到不同位向以记录一系列电子通道花样时,在<111>方向,<001>方向和<011>方向的准确位置下,观察到一些奇异花样叠加在电子通道花样上。这些奇异花样颇类似于在透射电子显微镜中所观察到的Kossel花样。这种花样具有两个重要性质:(1)花样的强度分布是随着电子能量(电子的加速电压)而改变;(2)花样的几何形貌可以用来描述晶体内部结构的一些特征。最后,从异常散射效应和晶格位与入射电子间相互作用强度a的观点,定性地解释了这种花样的衬度效应来源。

In this paper, the authors put forward several viewpoints about the most commonly used slideways of hydrodynamic type. Firstly, the source of existing three shortcomings, i. e. heaviness, stick-slipping and quick-wearing, of the hydrodynamic type of slideways is the bad lubrication condition. Secondly, the most effective and simplest method to improve the lubrication condition of hydrodynamic type of slideway is to control the surface texture scientifically. Thirdly, at present time, only the hydrodynamic type...

In this paper, the authors put forward several viewpoints about the most commonly used slideways of hydrodynamic type. Firstly, the source of existing three shortcomings, i. e. heaviness, stick-slipping and quick-wearing, of the hydrodynamic type of slideways is the bad lubrication condition. Secondly, the most effective and simplest method to improve the lubrication condition of hydrodynamic type of slideway is to control the surface texture scientifically. Thirdly, at present time, only the hydrodynamic type of slideways is still short of reliable designing calculating method, the authors believe that one of the main reasons here is the lack of counting in surface texture in existing formulae. The authors have checked several current formulae by putting in known data, they always show considerable errors. Fourthly, the authors have made theoretical analysis and calculation to the slideway with "wide-shallow scraped" surfaces, which was created in China in 1960's, and the results are conformed with the experimental ones by and large. On the basis of theoretical analysis, we confirm the great potentiality of "wide-shallow scrapped" slideways which are usually used now in China. Fifthly, the author; propose to make modifying for JB 2278-78 to improve the norm of scraped surfaces.

本文针对机床导轨中用量最大的动压型导轨目前存在的问题,提出以下几方面的看法:①动压型导轨普遍存在的“重”、“爬”、“磨”三大缺点,主要的成因为润滑状态不良;②为改善动压型导轨的润滑状态,最有效而且简单的办法是科学地控制导轨表面的几何形貌;③目前,动压型导轨还没有可靠的设计理论和设计方法。作者对现行的一些计算公式、判据举例进行了计算和评述,认为它们常常不大可靠的主要原因是忽略了表面形貌因素;④作者对我国创造的“宽(浅)刮法”导轨的润滑状态(承载能力和油膜厚度)进行了理论计算。计算结果与试验值比较一致。在理论计算的基础上,认为“宽(浅)刮法”还有很大的潜力,并对改进方向提出了看法;⑤作者认为JB2278-78所规定的导轨刮削规范,性能是很差的,建议修改这个规范。

In this paper, the formula for D~4 point-central projection was derived from the formula of dimensions of intersecting geometric figures by the author. BY using this formula the property of collineation and collecting property of D~4 point-central projection can be described clearly. The construction used to determine the perspective projection of a straight line segment. Which was presented in ref. [5], can be also used to construct the central projections of geometric figures of various dimensions. With this...

In this paper, the formula for D~4 point-central projection was derived from the formula of dimensions of intersecting geometric figures by the author. BY using this formula the property of collineation and collecting property of D~4 point-central projection can be described clearly. The construction used to determine the perspective projection of a straight line segment. Which was presented in ref. [5], can be also used to construct the central projections of geometric figures of various dimensions. With this construction, the vanishing point of straight lines and the vanishing line of plane can be discussed system- atically. particularly, this paper presented the concept of vanishing plane of the hyperplane and also analysed subordinate relationship between them; and the characteristics of central projection of geometric figures situated in particular positions,the 4-vanishing point-central projection of a hypercube and the triangular pyramid formed by its vanishing plane were also discussed in this paper.

本文根据由几何形相交的维数公式推导的D~4点中心投影公式,说明D~4点中心技影的同素性和积聚性。并把参考文献提出的直线段的透视投影的作图用于各维几何形的中心投影作图。通过作图,较系统地论述直线的灭点,平面的灭线,特别提出超平面的“灭面”概念,并分析它们之间的从属关系;讨论各种特殊位置几何形的中心投影特性,以及超立方体的四灭点中心投影及其灭面组成的三棱维。

 
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