壁

Re. With this equation we derived the formula of the inherent frequency of water in open and closed pipes when considering the pipe as a deformable material or as a rigid wall.

推导过程中分别考虑了管壁变形和刚性壁两种情况，并分析了影响水体固有频率的主要因素。

Objective To evaluate the changes of left ventricular regional wall motion during systolic and diastolic phase by color kinesis technique after different mitral valve replacement.

目的 应用彩色室壁动运动分析技术评价不同二尖瓣替换术方法对左室室壁节段性收缩、舒张运动的影响。

Such observation resulted from the special shape of the conical column, in which the composition of forces near the conical column wall was different from that near the cylindrical column wall owing to the existence of the inclined plane.

这是由台锥形柱特殊的结构造成的。由于台锥形柱斜面的存在使流体在管壁区的受力情况不同于圆柱的管壁区

Such observation resulted from the special shape of the conical column, in which the composition of forces near the conical column wall was different from that near the cylindrical column wall owing to the existence of the incline d plane.

这是由台锥形柱特殊的结构造成的。由于台锥形柱斜面的存在使流体在管壁区的受力情况不同于圆柱的管壁区

Numerical simulations were carried out to study the effect of reversible work and viscous dissipation on the heat transfer characteristics of compressible fluid flow in microtubes.

利用数值方法讨论了压力功和粘性耗散对微细光滑管内可压缩流动换热特性的影响，得出以下结论：微细管内 Ec沿管长是变化的，仅依据入口处的 Ec对压力功及粘性耗散的作用进行取舍是不确切的；等热流及等壁温换热条件下的计算结果显示，在入口 Ma及长径比较大时，考虑压力功及粘性耗散时得出的 N u要小于常规尺度管的理论值，在等壁温情况下，甚至出现了热流方向发生变化的情况

The research shows that gas concentration shows generally an increasing tendency along the working face airflow direction, from 0.095% to 0.18%, under the effect of gas drainage points, up-and-down changing locally; gas distribution in a transect of working face is unequal, under the effect of gas emission, ventilation and drainage, the gas concentration near coal wall is larger than that near goaf, which is a concave function distribution within a distance of 1876.5 m from the inlet of working face, after greater than 76.5m, which is a decreasing distribution from coal wall to goaf.

研究表明，该工作面瓦斯体积分数沿风流方向总体呈逐渐增加趋势，介于0.095%~0.18%之间，受瓦斯抽放点的影响，局部有起伏变化；工作面横断面瓦斯体积分数分布不均匀，受瓦斯涌出、通风和抽放的影响，靠近煤壁侧瓦斯体积分数要高于采空区侧，在距离进风口约18~76.5 m范围内为凹函数分布，大于76.5 m之后，从煤壁至采空区为单调下降函数分布。

The anti-reflux structure includes the stopper (54) having a conically shaped distal surface (59) and the inside surface (32) of the barrel (22) and the distal wall (31) being conically shaped (35) wherein the total included angle A of the inside surface (32) of the barrel (22) at the distal wall (31) is greater than the total included angle B of the distal surface (59) of the stopper (54) by at least 6 DEG .

抗回流装置包括具有圆锥形远面(59)的止动件(54)和针筒(22)在远壁(31)的圆锥形(35)的内表面(32)，其中针筒(22)在远壁(31)的内表面(32)的总夹角A比止动件(54)的远面(59)的总夹角B至少大6°。

Pollens of Polygonum convolvulus P. multiflorum P. cuspidatum were examined by transmission electron microscope and technique of ultrathin section. The results of thin section indicate pollens of P.

为此，本文以花粉壁的内部结构为重点，用透射电镜的薄切片技术，对广义蓼属蔓蓼组的4种植物花粉外壁构造的特点进行了观察和研究。

In this study we used a more accurate Kolmogorov-Crespi potential to describe the corrugation of the nanotubes.

第三，我们通过使用更加准确的Kolmogorov-Crespi势函数描述双壁碳纳米管的层间相互作用，研究了双壁碳纳米管的滑动和转动磨擦。

The cover plate (10) forming said side wall (18,22) is transparent or particularly clear in one partial area.

侧壁(18、22)或构成侧壁(18、22)的盖板(10)至少在局部区域上是透明的，特别是玻璃般透明的。

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％。