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The generalized criterion for minimum zone in the determination of form error of surface is presented on the basis of linear minimax techniques, and the criteria of such surfaces as for cylindricity and straightness with arbitrary direction are derived from this generalized criterion.

本文讨论形状误差最小区城的判别准则和判别方法。根据线性极差极小化问题解的特征,给出形状误差最小条件的统一判别准则。推导出各种形状误差最小区域判别法(包括圆柱度误差和任意方向直线度误差),并在几何判别的基础上得出代数判别的格式。

The equilibrious geometries and electronic structures of possible isomers of Si4N4 clusters are studied by using density functional theorywith basis sets 6-31G*.17 possible isomers are obtained.

用密度泛函理论中的杂化密度泛函B3LYP方法,在6-31G的水平上对Si4N4团簇的可能结构进行了几何结构优化和电子结构计算,得到了可能的17个异构体。

Directly reading the 210-layer of 0.65-mm-thick consecutive CT Dicom format images of human body thoracolumbar making use of 0.625-mm isotropous resolution thin layer scanning technique into the Mimics. Defining bone organization threshold, withdrawing each outline, partitioning each edge of layer picture, edited selectively and repaired by hole processing. After a redundancy data was cleaned, the thoracolumbar 3-D finite element geometry model was acquired. Then area mesh could be kept as the document Ansys named .lis as the suffix and be introduced into Ansys software directly to mesh body, and then transferred the body mesh to mimics to assignment son the basis of CT values, once again import Ansys to establish 3-D finite element model.

将以各向同性分辨率0.625 mm薄层扫描所得的层厚0.65 mm人体胸腰段连续断层210层Dicom格式CT图像,直接读入Mimics后界定骨组织阈值、提取各层面轮廓线、图像边缘分割、选择性编辑及补洞处理,去除冗余数据,三维化处理后获得胸腰段三维几何面网格模型,将其保存为后缀名。lis的Ansys文件,直接导入Ansys有限元分析软件进行体网格划分,再将体网格转入Mimics根据CT值给予赋值,再次导入Ansys生成有限元模型。

Jussi Jannes combined the featured vocabulary of geometry, trunk as wall and color with design method including the contrast, group planting and architectural method, then created diverse space and penetrated visual landscape.

扬内斯擅长运用几何形、树干&墙&和色彩等词汇,通过对比、单元式种植和建筑化的设计方法,创造丰富的园林空间层次和相互渗透的视觉景观。

Property is an magnificent concept in Banach space. H point is the meticulous and pointwise description of the H property.

性质是Banach空间几何理论中的一个重要概念,许多重要的结果都与H性质有关。H点是H性质的精细化、点态化。

Organic matrixs coming from cells play role in nucleation, growth, morphology, polymorphology of inorganic materials. This control of organic matrixs are mainly behaved by the interfaction between organic matrix and inorganic materials .The processing of organic matrix controlling inorganic material is called as molecular recognition. The mechanism of organic-inorganic molecular recognition contains three facts such as electrostatic attraction, lattice geometry matching and stereochemical complimentary.

细胞分泌的有机基质在无机矿物的成核,生长,形貌,多型和结晶学定向等过程中起到了调控作用,基质对矿化的这种调控作用具体表现在有机或生物大分子和无机离子在界面上的相互作用,有机质对无机晶体的成核,生长,晶形及结晶学定向等的控制过程称为分子识别,有机-无机界面分子识别机制主要包括静电作用,晶格几何匹配和立体化学互补三个方面。

The role of vinylene group in geometry,electronic structure and spectra property is analyzed according to the comparative study of the dyes.

通过对两种染料敏化剂的比较,分析了亚乙烯基对几何结构、电子结构和光谱特性影响。

Stone ballast plays an important role in ballasted truck of railway. Ballast density and resistance are an important parameter for the analysis of track structure and it has close relations with rapid deterioration of the quality of the track geometry as well as the amount of work in railway track maintenance.

碎石道床是铁路有碴轨道结构的重要组成部分,其道床密实度、道床纵、横向阻力不仅是轨道结构分析的重要参数,并且与轨道几何形位劣化和轨道养护维修工作量有密切关系。

In this paper, fractal geometry is u sed to quantitatively analyze the stress-strain curves of extruded rice.

该文利用分形几何的方法对挤压膨化大米的应力-应变曲线进行了定量分析。

So the design method given in this paper avoids the blindness of the design of the antenna, decreases the waste of the antenna fabricates repeatedly. On the other hand, this method takes advantages of the geometrical theory and the nonlinear optimization, so it can be used in a wide region. This leads us a new road to design conformal array in the complex electromagnetic environment.

因此,应用本论文的设计方法,避免了天线设计的盲目性,减少了重复加工的浪费,同时由于整套设计方法利用了几何绕射理论和非线性规化的数学手段,因而具有广泛的通用性,为复杂电磁环境下共形阵的设计走出了一条新路。

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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。

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