查询词典 tip-top

We approach the problem based on the perception that electric field induced microstructure evolution at the crack tip will lead to fracture and fatigue. It follows that a micrograph of intensified electric field induced domain switching at the crack tip is obtained, a theoretical model of domain switching induced fracture is proposed, and the failure mechanisms of electric fracture, electric fatigue and crack kinking are revealed.

论文从电场驱动的裂尖微结构演化导致电致失效这一基本思路出发，获得了裂尖集中电场诱发铁电畴变的实验图像，提出了电致畴变断裂的理论模型，阐明了铁电陶瓷电致断裂，疲劳裂纹扩展和裂纹偏折的失效机理。

The metal melt around the oblique crack tip passivates the crack tip and inhibits the cracking trend of main crack source.

在瞬间超强脉冲电流作用下，裂尖前缘发生了强烈的绕流热集中现象，斜裂纹裂尖附近金属熔化，钝化了裂尖，阻止了干线裂纹源的开裂趋势。

The different circumferential speed of the blade from the root to the tip and the tip clearance may be the main reason to form the vortexes.

引起这种现象的原因主要是从叶根到叶尖具有不同的牵连速度，在叶尖处牵连速度最大，叶片对气体的做功能力最强。

Numerical method is utilized to investigate the effects of discrete micro air injection from casing shroud upstream blade tip leading edge on the rotor tip flow in a low-speed isolated axial compressor rotor at the operating condition near stall point.

本文采用数值模拟方法研究了近失速工况动叶顶部前缘附近喷气对低速轴流压气机孤立转子叶顶区域流动的影响。

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Do not tip busboys, except in the now practically extinct cafeteria restaurant when a busboy carries your tray to your table. In this event 50 cents is standard tip.

不必付给餐馆工小费，除非是在那种现存为数不多的自助餐馆，当他们把盘子放在你的桌子上时，通常付50美分的小费就可以了。

In this study, in order to examine the dynamics of tip [Ca2+]i together with the dynamics of tip-localized F-actin in vivo, a kind of double labeled material was constructed. The Ca2+ and actin microfilaments of Arabidopsis pollen tubes were labeled by cameleon and GFP-mTalin respectively.

本研究以拟南芥花粉管为材料，通过转基因技术，将分别标记Ca~(2+)和微丝的两种荧光蛋白cameleon与GFP-mTalin在花粉管中同时表达，实现活体花粉管中Ca~(2+)与微丝的同时标记。

Segments produced clusters of somatic embryos from embryogenic calli or directly from root apical meristems , and that also can convert into bud directly in the different tissue culture conditions. Modified media B5 with 1.0 mg.L-1 2,4 - D and 3.0mg.L~1 6-BA is suit to induce calli, and 0.5 mg.L-1 NAA is fit for somatic embryos inducement from calli. 6-BA encreased direct somatic embryogenesis on root tip distinctly,but NAA is retard it. NAA also prolong the time of root-tip convert into bud directly.

在改良B_5(微量元素为原来的1／3)中加入1.0mg.L~(-1)2，4—D和3.0mg.L~(-1)6-BA对离体根尖的愈伤组织诱导较为合适，0.5mg.L~(-1)NAA有利于从愈伤组织上产生体细胞胚；6-BA明显促进离体根尖直接产生类原球茎，而NAA则有阻碍作用；同时NAA的存在也使离体根尖直接成芽的时间延长。

Aiming at irregularity of a real fracture surface or a real crack profile, applying Griffith's criterion and fractal geometry, the real asymptotic expression at the crack tip is developed, and it is discovered that the fractality of the crack reduces the stress singularity at the crack tip.

5针对实际断裂面或裂缝的不规则性，利用Griffith能量平衡原理及分形几何，推导了裂缝尖端实际应力场和位移场的表达式，研究发现，裂缝的分形性减小了裂缝尖端应力的奇异性。

Work on pressure-jets in preparation for the Jet Gyrodyne and the Rotodyne led Fairey to believe that a rotor-tip drive would be ideal for the Ultra-light Helicopter, and preliminary studies showed that a tip-jet-driven version could be designed to do better than meet the requirements.

飞机上工作的压力，在准备射流Gyrodyne和旋飞领导费尔雷相信，转子尖驱动器将是最理想的直升机超轻型，并初步研究表明一个举报喷气驱动的版本可用于做更好满足要求。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。