查询词典 Poisson ratio

In order to predict the surplus fatigue life of concrete under nondestructive condition,the effect of some parameters such as elastics modulus,Poisson s ratio and density of concrete on the fatigue life is discussed in this paper.

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The shear modulus and mass density of FUMs are assumed to be of exponential form and the Poisson's ratio is assumed to be constant.

假设裂纹突然受到均匀载荷作用，材料的剪切模量和密度为指数形式模型，泊松比为常数。

Based on logging and petrophysics analysis,the elastic parameters(such as elastic impedance,Poisson's ratio and so on) of the effective reservoir are obtained by prestack inversion,and fluid properties are analyzed,which can provide reference for drilling well location.

针对苏里格地区盒8段有效储层厚度薄，横向变化快，常规解释结果多解性强的特点，从测井、岩石物理分析入手，开展叠前地震反演提取有效储层的弹性参数，综合分析预测储层的含流体特性，为钻探井位提供依据。

The rock mechanics parameter s,such as Yangs modulus and Poisson's ratio,are determined on the basis of surface fracturing treatment pressure and instantaneous shut-in pressure during PAD stage.

应用常规的地面压裂施工压力资料和前置液阶段的瞬时停泵压力测试等资料，初步探讨了求取储层原位岩石力学参数的新方法。

On the basis of numeric results, the laws of how the mechanics of fiber and matrix, the volume fraction, aspect ratio and the orientation state of fiber react to the Yangs modulus, shear modulus, poisson modulus of short fiber reinforced composites are been investigated.

从数值上研究了纤维和基体的力学性能、纤维在复合材料中的体积百分数及其长径比、纤维取向状态对短纤维增强复合材料的杨氏模量、剪切模量、泊松比等力学性能的影响规律。

On the experimental device of metallic membrane bulging, the measuring of in-plane true strain, transverse plastic strain at the pole of sheet, and the contour shape of sheet can be done. So that the relationship between true stress and true strain in the all deformation range of metallic sheets can thus be built up. Furthermore, the changing pattern of elasto-plastic and plastic Poisson's ratio can also be obtained.

在平膜鼓胀装置上，通过测量膜片极顶的面内真应变和横向塑性应变以及膜片的轮廓形状，并计人泊松比随变形过程发生的变化，可建立二向应力状态下箔材从弹性经塑性至破裂的整个变形范围内真应力和真应变的关系，同时还可以得到弹塑性泊松比和塑性泊松比的变化规律。

We obtained the nasal deformation with three-dimensional reconstruction images and adjusted to separate the images of nasal cartilage, defined the form and structure of nasal deformation. Then we measured 10 cases of adult cadavers nasal alar, lateral and septal cartilage through modern mechanical measuring instruments, to obtain the elastic modulus of above three part structure of nasal cartilage, then to obtain more accurate nasal cartilage elastic modulus data through statistical analysis. At the same time, according to the relevant literature, we obtained nasal soft tissue biomechanical properties, mainly were elastic modulus and Poisson\'s ratio. Finally we established three-dimensional finite element analysis model of unilateral cleft lip nasal deformation, defined the model\'s constraint conditions and carried out biomechanical measurement and analysis of unilateral cleft lip nasal deformation.

将唇裂鼻畸形患者鼻部进行三维重建并调校，分离出外鼻软骨的影像，并对鼻部组织进行分层和重建，确定畸形鼻的形态和组织结构；通过现代力学测量仪器，对10例成人尸体鼻部的大翼、侧鼻和中隔软骨进行弹性模量的测量，获得上述三部分鼻部软骨结构的弹性模量数据，并通过统计学分析来获得较为准确的鼻部软骨结构的弹性模量数据，同时查阅相关文献，得到鼻部软组织的相关生物力学性质，主要为弹性模量和泊松比；建立单侧唇裂鼻畸形的畸形鼻部三维有限元分析模型，确定有限元分析的边界条件等，进行单侧唇裂鼻畸形的鼻部生物力学的测量和分析。

At last, two ratio problems are discussed. The first is the minimum ratio spanning arborescence problem, and the second is the minimum ratio facility location problem on an undirected network.

4比值问题，即如何求网络中的最小比值树形图的问题和如何在无向网络中以最小比值为目标进行选址的问题。

The statistics, in Shanghai and Shenzhen listed companies, the asset liability ratio of more than 65% of the 102 companies, including asset-liability ratio at 65% to 80% with 81, asset-liability ratio of 80% to 100% 17 home, assets and liabilities have exceeded 100% eliminate the white PT Yu, ST Baiyun Mountain, PT agricultural trading companies, etc.

经统计，在沪深两地上市公司中，资产负债率超过65%以上的公司有102家，其中资产负债率在65%至80%的有81家，资产负债率在80%至100%的有17家，资产负债率超过100%的有PT渝汰白、ST白云山、PT农商社等4家。

The results show that current ratio and quick ratio, cash flow ratio, total asset turnover and return on assets are the most important variables to provide significantly discrimination ability.

本文实证如下：在财务变数中以强调短期偿债能力的速动比率和流动比率、现金基础的现金流量比率指标以及经营能力和获利能力上之总资产周转率与资产报酬率等，於财务危机预警上占重要的区别能力。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。