查询词典 tensile stress

Consequently,the stress relaxation by vibration was resulted from interaction of residual stress,shearing stress and the shearing stress component of the tension and press stress field.

所以在振动时，应力松弛是由于残余应力、剪切应力和拉压应力的剪切应力分量共同作用的结果。

The biomass of rice were not affected by partial-root water stress under those three nitrogen forms, but root parameters of sole nitrate supply decreased significantly under water stress compared to non-water stress part. Water stress stimulated the absorption of NO_3~--N. The photosynthesis rate was inhibited by water stress under NO_3~--N supply, but no effects under NH_4~+-N supply.

局部根系水分胁迫对3种供氮形态营养水稻总生物量没有明显影响，但对单供NO_3~--N营养水稻根系的生物量、根系总长、根体积、平均直径以及根表面积的影响最大，均以未受水分胁迫的一侧根系生物量明显高于另一侧。

An unit initial stress method to calculate stress intensity factor is introduced, which uses the degradation of the 1/4 node singular unit, calculates the stress through the crack tip close to the best stress point, and gets the stress intensity factor.

提出一种计算应力强度因子的单元初始应力法，该法采用退化的1/4节点奇异单元，通过近裂尖最佳应力点应力进行求解，进而求得应力强度因子。

Water stress is one of the most important abiological stress to maize seedling .In this study, we arm to identify the sensitive stage of maize seedling to water stress and select the material which tolerance to flooding. And we use waterlogging tolerance index to identify the sensitive stage of maize seedling. we have studied 20 inbred lines of maize which seedlings under water stress in three stage. The result show that the three leave stage is the most obvious stage to flood stress. In addition, we have analyzed ten of the inbred lines to re-act the waterlogging tolerance index. The result show good re-action. And the result also show that waterlogging tolerance index is a credible index to select waterlogging tolerance materials in seedling.

涝渍是玉米苗期主要的非生物逆境胁迫之一；本试验通过对20份玉米自交系进行苗期的淹水对照试验，采用了三个处理时期，并利用耐渍系数作为指标进行敏感时期的鉴定，结果表明三叶一心期是淹水的相对最佳时期；同时利用其中10份自交系对耐渍系数的重演性进行了分析，结果表明其重演性很好；同时结果还表明耐渍系数是耐渍性鉴定的一个可靠指标。

Abstract］ objective to explore the occupational stress status in head nurse.methods sixty one head nurses completed the osi-r.results there was occupational stress in head nurse.there was significant difference of occupational stress among head nurse with different age,educational background,job title,time to hold a post.conclusion head nurse is matrical leader,who plays important role.each medical treatment organization should be as far as possible to reduce occupational stress and relieve the occupational stress,in order to protect their spirit and body health.

职业紧张或称职业应激、工作紧张，一般是指在某种职业条件下，客观需求与主观反应之间失衡而出现的生理变化和心理压力，以及由于不能满足需求而引起相应的功能性紊乱［1］。21世纪，临床护理工作面临着新的挑战和更大的压力。护士长作为医院管理中最基层的领导者和组织者之一，扮演着重要的角色，护理管理水平的高低直接影响到医院管理质量的优劣和医疗水平。因此，了解护士长职业紧张现状，积极提出预防对策，以提高护理管理水平。

This conclusion is based on three groups of experiments with detached root tips of wheat seedlings: By following the time course changes of NO synthase , superoxide synthase and ABA accumulation under dehydration stress, we found that ABA accumulation was preceeded by the changes of NOS and superoxide synthase. ABA accumulation induced by dehydtrion stress and osmotic stress can be blocked by NO scanvegers and NOS inhibitors, while only dehydration stress-induced ABA accumulation can be blocked by ROS scanvegers. Exogenous applied NO or ROS induced ABA accumulation in root tips of wheat seedlings, and synergistic effects were found between NO and NO. The in planta expereiments also proved that ROS and NO are involved in water stress-induced ABA accumulation.Ⅱ.

证据主要来自以离体根尖为材料的实验：(1)通过检测干旱胁迫下小麦根尖NOS活性、O〓合成酶活性和ABA积累的时间变化进程，发现ABA积累滞后于ROS和NO的变化；(2)抑制剂实验表明，NO清除剂和NOS抑制剂可以抑制自然干旱胁迫及渗透胁迫诱导的小麦根尖ABA积累，ROS清除剂抑制自然干旱胁迫诱导的ABA积累而不抑制渗透胁迫诱导的小麦根尖ABA积累；(3)在非胁迫条件下施加外源的ROS或NO可以诱导小麦根尖积累ABA，ROS和NO之间具有协同作用。

According to the stress-strain curve equation of concrete compression, we simplified the rectangle stress graph of the stress on the area of its bending cross-section in this paper. A general formula for the height of equivalent compression stress block and the stress strength formula were deducted.

根据混凝土受压应力－应变关系的常用曲线方程，对受弯截面压区混凝土应力进行了矩形应力简化，推导得到了等效矩形应力图形高度及应力强度的一般公式。

According to the stress characteristics of coal floor with faults, corresponding simplified mechanical model is built to obtain the equations of shear stress and normal stress on the fault, as well as the influential rules of fault dip on shear stress, normal stress and fault activation.

针对含断层缺陷底板的受力特征，建立相应的简化力学模型，分析得到断层面上的剪切应力和法向应力表达式，并研究断层倾角对断层面上剪切应力、法向应力及断层活化的影响规律。

Thus, the stress behaviour of orthotropic steel bridge decks under elastic phase is well understood, in cluding the stress component of each structural system; the membrane and bending stress distribution in ribs, crossbeams and deck plates; the stress concentrations at the edges of cut-outs in crossbeams; the influence lines of stresses at some positions; and the number of stress cycles produced by the passage of a vehicle.

由此，充分完整地了解了正交异性钢桥面板弹性阶段的应力特性，包括钢桥面板各结构体系的应力成分，纵肋、横梁和盖板的薄膜应力和弯曲应力分布，横梁开孔边缘的应力集中，一些部位的应力影响线以及车辆通过引起的应力循环次数等。

The stress distribution of adhesively-bonded metal/metal single lap joints under tensile shear loading is analysed using elastic-plastic finite element method .The influence of lap length on the strength of adhesively bonded metal joints which are bonded with phenolic resin and acrylic resin respectively is discussed in detail. It is shown that adhesive has great influence on the stress distribution of the lap region. With the increment of lap length, the stress concentration of adhesive layer decreases.

本文在对国内外关于金属-胶层复合材料接头力学性能数值研究及发展现状进行综述的基础上，运用有限元法并结合实验手段主要研究了胶接接头承载后的力学行为，综合考虑了几何尺寸和物性参数对接头强度和应力分布的影响，并运用层次分析法对胶接质量进行综合评估，综合考虑接头形式，制造工艺，操作人员素质等因素的影响。

The production moved off-Broadway to New York City, where she won the Joseph E. Calloway award for her performance, and was profiled in American Theater Magazine as one of ten young theater artists to watch.

生产提出过百老汇的新的纽约市，在那里她赢得了约瑟夫calloway奖，她的表现，并于异型在美国的战区杂志之一， 10战区的青年艺术家观赏。

It's a risk tradeoff, and I believe that adding test support code usually wins.

这是一个风险的权衡，我相信添加测试代码通常会占上风。