跨距

The loci of plastic hinge line and the maximum load during first roof weighting are determined by using kinematical method, and the minimum span of roof key stratum is derived.

利用机动法确定了老顶岩板初次来压时载荷的上限值和塑铰线的位置，得到了顶板岩体关键层的最小破断跨距。

Correlation analysis revealed that the percentage of damaged seeds had a significant negative correlation with the micronaire and a significant positive correlation with the lint index , and did not show significant positive correlation with the 2.5% fiber spanlength, uniformity, strength, fiber elongation and the seed index.

相关分析结果表明，棉花种子虫害率与马克隆值成显著负相关；与衣指成显著正相关；与 2.5%跨距长度、整齐度、比强度、伸长率和子指等指标相关性较低。

The top chords will be designed with a temporary bolted splice at mid-span.

设计顶部弦杆时，应在跨距中间有一临时螺栓铰接。

The objective of this paper is to solve the dynamic responses of a multispan fluid-conveying Timoshenko pipe by using the quasi analytical-and-numerical-combined method.

本文之主旨在使用类似的解析与数值混合法(简称quasi ANCM)来进行一具有剪切变形及旋转惯性效应的多跨距Timoshenko流体输送管之动态分析。

The objective of this paper is to solve the dynamic responses of a multispan fluid-conveying Timoshenko pipe by using the quasi analytical-and-numerical-combined method.

中文摘要本文之主旨在使用类似的解析与数值混合法(简称quasi ANCM)来进行一具有剪切变形及旋转惯性效应的多跨距Timoshenko流体输送管之动态分析。

Coal lane sheet crack hierarchical structure of the roof span stability analysis.

煤巷板裂结构顶板分层稳定跨距分析。

In succession, by using of the simulative program under various running conditions, we studies the different effects that various parameters on the dynamic current-collecting such as running speed, span length, ocs tension force, masses of pantograph head and framework, damping capacity and stiffness etc. Moreover, measures are suggested to improve the quality of current-collecting, especially the idea of active control scheme, which restains the fluctuation of contact force by modulating the air pressure of pantographs airbag.

利用弓网仿真程序对各种工况的弓网受流进行模拟仿真，分别研究了列车运行速度、接触网跨距、接触线张力以及受电弓弓头和框架质量、阻尼、刚度等对弓网系统受流的影响，提出通过主动控制技术对弓网系统的振动进行抑制的气囊调节方法，将受电弓气囊的气压值作为控制对象，通过对气囊气压的调节来抑制弓网接触压力的波动。

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％。