无应力的

AVO analysis is suggested for solving to solve the difficulty in identification of thin alternating layers in exploration of oilfields. It can improve the current method that has no thickness variable in the formula of reflective and is limited by sampling rates in calculation of the coefficient in the time of domain. Using the relationship of stress and displacement on two interfaces, this paper derives the spectrum of reflective coefficient for any incidence angle and thiekness of thim layer based on the equation of seismic wave propagation in the frequency domain.

针对油气田开发中薄互层认识难的问题，提出从AVO分析解决困难，克服现有方法在反射系数公式中无厚度变量、时间域计算反射系数谱受采样率限制的不足，运用两个界面间位移与应力关系，从频率域地震波传播方程推导了任意入射角和薄层厚度下的反射系数谱。

Ling recommended a design that is collarless, polished, and tapered in two planes ( Fig. 7-21 ) to allow a small amount of subsidence and to maintain compressie stresses within the cement mantle.

Ling推荐了一种无颈领、抛光，并在两个平面逐渐变细（图7－21）的假体，它允许少量的下沉并可维持骨水泥套内的压应力。

Changes in the vertical distance produce different effects of stress on edentulous jaw under the same load.

在同等载荷情况下，垂直距离的改变对无牙颌各区域产生不同的应力效果。

Based on the basic concept and nomoment theory of rotational shell,the geometry and membrane stresses of the ellipsoidal head are discussed in this paper.

根据回转壳体的基本概念及回转薄壳的无力矩理论，探讨了椭圆封头的几何形状及其薄膜应力等问题。

By means of different subjects and te chniques,the paper makes an overall study on the crustal stability of Beihuaiyang region and its adjace nt areas from the aspects of current t ectonic stress fields,principal fa ult structures,analysis of regional fa ults and neotectonic activity,seis mic activity and numerical modeling,etc.

运用多学科、多技术相结合的研究方法，从现今构造应力场特征、现代地壳形变特征、主干断裂构造以及区域断裂活动性分析、新构造运动、地震活动、数值模拟等方面入手，对北淮阳及其邻接区地壳稳定性进行了全面而系统的研究，指出本区地震活动受走滑活动断裂控制，中、强地震集中于区内东南部和西北部NW向与NE向断裂交汇处；第四纪无大规模差异升降运动；数值模拟等综合分析表明，信阳地区的区域构造稳定性高，现代地壳形变量小，应力平缓，地震活动少且弱。

The parameter of mechanics was analyzed with the finite element system in three anteflexed levels:6°, 9° and 12°. Results The stress and displacement of the right side of lumbar disc were increased gradually during the manipulation.

结果 ①对于正常腰椎，椎间盘左侧后缘的应力随着腰椎前屈角度增大而增大，前屈角度的变化对位移的影响相对较小，椎间盘无明显向后突出。

Since conventional binominal and exponential deliverability equations ignore the effect of stress sensitivity, the open flow potential calculated by it is always bigger than actual value.

常规二项式和指数式产能方程忽略了应力敏感的影响，计算的无阻流量一般大于实际值。

Engh et al. made detailed examinations of stress shielding of the femur after cementless total hip replacement.

Engh等对无骨水泥固定全髋关节置换后股骨的应力遮挡作了详细的检测。

There aren't any pipe joints of integral valve, therefore it's not subject to pipe or bolt influence, pressure case will not be subject to "mutation" of pressure.

不带任何管接头的整体式阀体，因此不受管道或螺栓应力影响，并且由于阀体无任何管接头，故耐压壳体不会受压力&突变&的影响

Influences of the conditions, such as seed value of randomizer, the form parameter of statistical distributing function m, cell number, stress strain state, if there are weak areas in the center of specimens, limit conditions, random evaluating method of material factor on the elastic-plastic failure process of rock specimen are discussed.

分别研究随机数发生器种子值、统计分布函数的形态参数m、单元数目、应力应变状态、试样中心有无弱区、边界条件、材料参数随机赋值方式等条件对岩石试样弹塑性破裂过程的影响。

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％。