弹性

A perfectly inelastic demand curve, perpindicular to X axis, has zero elasticity.

理想的无弹性曲线垂直于X轴，表明具有0弹性。

According to the plane cross section assumption, configuration of a rod is expressed as a history of the cross section with arc coordinate. A special solution which stands for equilibrium in straight line state is obtained from differential equilibrium equation. Linear perturbation equation is derived and its general solution is obtained in which the integral constants are determined by constrained conditions at two ends of the rod. The condition of existence of non zero solution of the integral constants gives to the Greenhill formula of exact elastic rod model, which shows that the boundary of stable area is a closed curve and of symmetry, and inference of shearable and extensible to stability of the rod is depend on three factors: difference between flexibility of shear and extension of a section of the rod, bending stiffness and the length of the rod.

基于平面截面假定，弹性杆的位形表达为截面的弧坐标历程，根据平衡微分方程得到了两端受力螺旋作用时的直线平衡特解，导出了线性化扰动方程及其通解，积分常数根据两端铰支时的边界条件确定，并根据其存在非零解的条件得到弹性直杆精确模型的Greenhill公式，表明稳定域为一对称的封闭区域，拉/压和剪切对稳定性的影响取决于：拉/压柔度与剪切柔度之差，抗弯刚度和杆长这三个因素

This thesis presents the analytical solution for anti-plane problem of an elliptical inhomogeneity with non-uniformly distributed eigenstains embedded in anisotropic elastic media with a single plane of symmetry.

本文求解了具有一个弹性对称面各向异性介质椭圆夹杂受非均匀特征应变作用时的反平面问题的弹性应力、应变场。

With the elastic scope of design for bridge and pontoon structures which are used continually,it is necessary for the structures to be forecasted when their elasticity is invalid.

鉴于渡河桥梁结构必须具备重复使用的特点，其设计范围仅涉及弹性理念，因此必须对服役渡河桥梁装备结构的弹性失效进行预测。

Under the same conditions, v of lherzolite is highest, that of pyroxenite comes next and that of basalt is lowest.

在1.4GPa压力下获得二辉橄榄岩和辉石岩的弹性波速分别为7.87km/s和7.47km/s，最接近壳幔过渡带的弹性波速。

The nonlinear equations are dealt by the quasi linear iteration equation,at last,by the orthogonal discrete method,the solutions of the initial problem are obtained.

本文建立的载流板壳二维磁弹性问题的数值计算方法——差分正交离散法不仅对二维问题有效，同样也为三维磁弹性的边值问题的解决奠定了理论基础。

Next, it has used a non-linear elastic analysis method and setup an economical elasticity of fractal dimension model. By means of the model, the paper has given a positive analysis on the long-term fluctuation of the national economic growth for both countries, which it has fund that some existed quasi periodic rules and illustrated macroeconomic policy mechanism under the uncertainty conditions.

其次，利用了非线性弹性分析的方法，建立了经济弹性分维模型对中美两国经济增长的长期波动情况加以实证研究，发现了投资与财政对于两国长期经济增长的拟周期性的一些规律，揭示了不确定性条件下存在的宏观政策机制。

Two finite element analyses were conducted. First, the poroelastic dynamic equations were transformed to Laplace domain and the Galerkin finite element approach is applied to derive the stiffness matrix of rectangular porous element for conducting the finite element frequency domain analysis.

为探讨空间声场之特性，本文将分析方法归纳为二部份，第一部份应用拉普拉斯转换后之多孔线性弹性动态方程以二维矩形多孔弹性元素及 Galerkin有限元素法推导并进行有限元素频域分析。

The conclusions are that the mode II dynamic stress intensity factor increase with the shear relaxation parameter of viscoelastic materials increasing, with swelling relaxation parameter decreasing, and with shear module and Poisson's ratio of elastic materials increasing.

得到Ⅱ型动应力强度因子随着粘弹性材料的剪切松弛参量的增加而增大，膨胀松弛参量的增加而减小；随着弹性材料的剪切模量和泊松比的增加而增大。

The pore-scale elastic polymer microsphere can improve waterflooding through its migration in pores, blocking-up leaking layers, elastic deformation, remigration, re-plugging, and changing direction of injected water in reservoirs.

孔喉尺度聚合物弹性微球具有在油藏岩石孔隙中运移、封堵、弹性变形、再运移、再封堵，及全程改变注入水渗流方向的特点。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。