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and stress
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  应力
     The Relation between Bone Loss of Mandibular Incisors and Stress Distribution Patterns with Three-Dimensional Finite Element Analysis
     三维有限元法分析下颌切牙牙槽骨吸收与应力分析的相关关系
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     Clinical Research of Revision Operation and Stress Finite Elemental Analysis of Pedicle Screws System
     椎弓根螺钉系统翻修手术的临床研究及其应力有限元分析
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     Study on the Temperature and Stress State of Thin Slab in Continuous Casting
     薄板连铸坯的温度与应力状态的研究
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     Polarized Interferometry for Strain and Stress Analysis
     应力应变分析的偏振干涉法
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     Study on Infiltrate Character and Coupling Analysis of Seepage and Stress in Rock Failure Process
     岩石破裂过程渗透性质及其与应力耦合作用研究
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  “and stress”译为未确定词的双语例句
     Experimental Studies on the Relationship between Endothelin-1 Gene and Stress Ulcer
     内皮素-1基因表达与应激性溃疡关系的实验研究
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     Studies on Changes in CREB Signal Pathway of the Brain and Stress Hormone Levels of Plasma in Ethanol Dependent Rats
     酒精依赖大鼠脑CREB信号通路及血浆应激激素水平变化的研究
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     Application of Biophotonical Technique in Examining the Vigour of Rice Seeds and Stress Reaction of Injured Plant and Study of Their Mechanism
     生物光子学技术在水稻种子活力和植物应激反应中的应用研究
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     Study for the Effect of Neuroendocrine in Normal and Stress Ulcer Rat by Acupuncturing ST36
     针刺足三里穴对正常及应激性溃疡大鼠神经内分泌影响的研究
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     Analysis and Application of Coupled Seepage and Stress Fields in Fractured Rock Slope
     裂隙岩质边坡渗流场与应力场耦合分析及工程应用
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  相似匹配句对
     Stress and Immunity
     应激与免疫
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     stress concentration;
     应力集中;
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     Stress and Nitriding
     应力与渗氮
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     Stress Chemistry
     应力化学
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  and stress
Node force and stress results of the torsion bar from last step simulation were acquired; taking into account the material characteristics and influential factors, fatigue life of the flexible body of the torsion bar was predicted.
      
Synergistic effects of hydrogen and stress on corrosion and SCC processes were discussed.
      
Based on the test results, the relationship between tensile strengths and stress ratios and temperature is proposed.
      
A new approach to the development of natural cancer drugs from hydrobionts selected for longevity and stress resistance is analyzed.
      
Intracellular location of sHsp under normal and stress conditions is described and it is emphasized that under certain condition sHsp interact with different elements of cytoskeleton.
      
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Creep under very small torsional stress has been investigated for 99.95% polycrystalline iron in the temperature range of 350°-525℃. The general features of the creep curves obtained are essentially the same as those previously reported for 99.991% aluminum. The creep is shown to be consisted of two parts, one occurring at lower temperatures or shorter times and the other at higher temperatures or longer times. The first part of the creep is limited in extent and is associated with the viscous behavior of grain...

Creep under very small torsional stress has been investigated for 99.95% polycrystalline iron in the temperature range of 350°-525℃. The general features of the creep curves obtained are essentially the same as those previously reported for 99.991% aluminum. The creep is shown to be consisted of two parts, one occurring at lower temperatures or shorter times and the other at higher temperatures or longer times. The first part of the creep is limited in extent and is associated with the viscous behavior of grain boundaries. The activation energy for this grain-boundary creep is 78,000 ± 4,000 calories per mole according to the present creep and stress relaxation measurements. This value is close to the activation energy for self-diffusion of iron, a correlation which indicates that, in so far as to the mechanism of atomic migration is concerned, grain boundaries may not be very different from the interior of the grains.

用99.95%的多晶纯铁作了从350°-525℃的扭转微蠕变及应力弛豫试验,所得结果的概貌与以前用多晶纯铝所得的基本上相同。从蠕变曲线上可以看出这蠕变是由两部分组成的:第一部分是在较低温度或较短时间内发生的,第二部分是在较高温度或较长时间内发生的。第一部分的蠕变是有限的,是由于晶粒间界的粘滞性滑移所引起。根据微蠕变及应力弛豫测量的结果,这一部分蠕变所包含的激活能是78,000±4,000卡/克分子。这个激活能(晶粒间界滑移激活能)的数值与纯铁自扩散的激活能很相近,表示晶粒间界与晶粒内部对于原子迁移的基本过程而言并没有显著的差异。 加碳于纯铁中对于这两部分的蠕变都有显著的影响。最值得注意的结果是含碳量少到0.0004%时已经使晶粒间界的粘滞性滑移受到显著的阻碍。这些发现在控制金属高温蠕变的问题上指出一个一般性的原则,对于以前所提出来的晶粒间界空穴模型也提供了一些新的实验证据。 根据加碳的实验结果,对于第二部分高温蠕变的机构也提出了一个初步的看法,这蠕变所包括的基本过程可能是晶粒内部的空穴中的原子重新排列。

In order to approach the world level of shipbuilding,science within twelve years,it is necessary to survey the recent development in shipbuilding research of some leading maritime countries.This paper starts with stating the achievments of shipbuilding research work in this himdred years and steps taken by some leading countries for further development after the World War Ⅱ.Then it goes on to discuss the main achievments in the field of ship hydrodynamics and ship strength in recent years,and these are subdivided...

In order to approach the world level of shipbuilding,science within twelve years,it is necessary to survey the recent development in shipbuilding research of some leading maritime countries.This paper starts with stating the achievments of shipbuilding research work in this himdred years and steps taken by some leading countries for further development after the World War Ⅱ.Then it goes on to discuss the main achievments in the field of ship hydrodynamics and ship strength in recent years,and these are subdivided into the following headings: Ship hydrodynamics:(1)Systematic model testing.(2)Model-ship co-relalion, (3)Theory of wave making resistance,(4) Systematic testing of model propellers, (5)Propeller theory,(6)Cavitation,erosion,Singing of propellers,(7)Ship motion and seakeeping quality. Strength of ships: (1) Strength testing of actual ships and stress measure- ments on sea way,(2)Strength testing in model tank,(3)Problem of long superstructure,(4) Elastic and plastic strength of ship plating,(5) Ship vibration, (6) Materials for ship construction. This paper also gives an account of the preliminary achievments of the Chinese shipbuilding research work in respective fields and expresses the opinion that a great deal of amount of work is left to be done for the Chinese naval architects.Finally,the paper suggests that China must redouble her effort to construct her main shipbuilding research base equiped with instruments and apparatus of highest quality and to train the research experts as quick as possible.

为了在十二年内争取赶上世界的造船科学水平,就有必要对世界各国造船科学研究的发展,进行一番探讨。本文首先说明造船科学在百年来所起的作用,和二次世界大战后各国对造船科学研究的组织和发展。进一步探讨了二次大战后在船舶流体力学及船体强度学两方面的主要成就。并分以下几部份叙述: 船舶流体力学方面:(1)关于船型的系列试验;(2)关于船模与实船的换算关系;(3)兴波阻力理论;(4)推进器系列试验;(5)推进器理论;(6)推进器空泡、剥蚀、唱音等问题;(7)船舶运动和适航性。船体强度学方面:(1)实船强度试验和航行中应力测量;(2)船模试验池中的强度试验;(3)长上层建筑问题;(4)船体钢板的弹性塑性问题;(5)船体振动问题;(6)造船用材料问题。文中也涉及一些我国造船科学研究的初步收获,并说明我国在整个造船科学领域中还留着很大空白面。为了进一步发展我国的造船科学研究;建设主要的研究基地,充实仪表设备和培养研究人员是刻不容缓的事。

The paper presents a generalized theory for thin elastic shallow shells in general orthogonal coordinates. Both tangential surface forces as well as normal surface load are considered in the present theory, provided that these tangential forces can be derivable from a load potential. The basic equations are reduced likewise to two simultaneous forth-order differential equations in normal deflection w and stress function F, and they are further combined into a single complex differential equation. The theory...

The paper presents a generalized theory for thin elastic shallow shells in general orthogonal coordinates. Both tangential surface forces as well as normal surface load are considered in the present theory, provided that these tangential forces can be derivable from a load potential. The basic equations are reduced likewise to two simultaneous forth-order differential equations in normal deflection w and stress function F, and they are further combined into a single complex differential equation. The theory is then specialized to the shallow shells of revolution as a special case. With this simplified theory, the axisymmetrical bending of a paraboloidal shell is investigated. A general solution of such a problem is given in terms of the well-known Thomson functions, presumably applicable to all paraboloidal shells. In addition, detailed analyses on various types of shells are made, so as to provide the designers the means to an optimum design of structure under the given load. In order to demonstrate the proper procedure of design, the paper has also included a simple example of uniform normal load. Through numerical comparison, it reveals that the paraboloidal shell of second degree i.e. the shallow spherical shell is a most favorable design among all under this particular loading.

本文首先对扁壳的基本方程作了新的改进,将它表达为一般正交曲线坐标的普遍形式,同时还包括有势的切向表面载荷的情况。文中结合旋转扁壳,建立了这类壳体的简化复数微分方程。根据这一简化理论,对抛物旋转扁壳的轴对称弯曲问题作了研究,并给出以Thomson函数形式表示的普遍解。它将适用于所有类型的抛物旋转扁壳。文中还针对各类壳体的具体情况作了比较深入的分析,使设计者便于在给定载荷的情况下进行壳体最佳线型的选择。最后作者以简单法向均布载荷为例,示范其设计方法。通过数值计算的比较表明,球面扁壳乃是在这类载荷形式之下具有最佳承载性能的壳体。

 
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