孔径

Tail gate of flume ; flow pattern ; distribution of velocity ; diameter of orifice

水槽尾门；流态；速度分布；孔径

In order to improve the effects of flume on its flow pattern at the tail gate,through analyzing of the influence of several commonly-used tail gates upon their flow patterns at their tail segments, and combining the formula of logarithm velocity distribution and that of free discharge from small orifices, a formula of calculating orifice diameter in a new inclined dragging tail gate is deduced.

为了改善水槽尾门对水槽尾部流态的影响，从几种常用水槽尾门对流态影响的分析入手，结合明渠流速分布对数公式和小孔口自由出流公式，并根据分层来流量与孔口出流量相等的原则，推导出一种新型斜拉孔板尾门开设孔径的计算公式。

Through an analysis on mud-clogging mechanism of suction nozzles on wet type sweeper, a concept is suggested, that water ratio in dust nearing the wall of suction nozzle duct should be decreased so the mud stickiness can be controlled under a critical value and not sticking to the duct wall whereas water ratio in central dust passage of the duct is properly increased to satisfy effective dust absorbing. On the basis of the concept, a water spraying device is designed with improvement for suction nozzles. In the device, the water hole numbers, diameters and distribution along the nozzle circumference as well as initial direction of water spraying are all determined according to concrete suction nozzle structures.

通过对湿扫型道路清扫车的吸嘴易被泥土堵塞的机理分析，提出降低吸嘴流道近壁的尘土的含水率，控制泥块的黏性处于临界黏性以下，使泥块不黏附于流道壁面；而将吸嘴流道中心部位的尘土的含水率适当加大，以满足有效压尘的解决思路，并根据这种思路改进设计了一种吸嘴喷水装置，按不同吸嘴的具体结构确定孔数、孔径、孔沿圆周的分布规律和喷水的初始方向等要素。

Methods The concentration effects of stock solution of vaccine by filter membrane with various sizes were compared by detecting HFRS virus antigen by ELISA. The purification effects of ion exchange chromatography and gel filtration were also compared.

用ELISA检测HFBS病毒抗原的方法，比较疫苗原液通过不同孔径滤膜的浓缩效果；比较离子交换和凝胶过滤的纯化效果。

The steam line will reduce the fluid resistance to is smallest, the slow circular aperture's design can reduce the rapids and the pressure, the long curving radius of action will have the good mobility.

蒸汽线路会把流体阻力减到最小，较缓的圆形孔径的设计能够减少湍流和压力，较长的弯曲活动半径会产生较好的移动性。

Mechanical-type steam trap pressure drop by different paragraphs, divided into a variety of specifications of the valve seat aperture "No. Seat", each of the above pressure and "its seat" of a curve of the displacement of coordinates, different "seat No."The thinning of water are very different.

机械型疏水阀按不同的工作压差段，分成多种规格阀座孔径的&阀座号&，每个工作压差段与&阀座号&组成一条坐标曲线的排水量，不同&阀座号&的疏水量有很大差别。

Mechanical-type steam trap pressure drop by different paragraphs, divided into a variety of specifications of the valve seat aperture "No. Seat", each of the above pressure and "its seat" of a curve of the displacement of coordinates, different "seat No."The thinning of water are very different.

机械型疏水阀按不同的事情压差段，分成多种规格阀座孔径的&阀座号&，每个事情压差段与&阀座号&构成一条坐标曲线的排水量，不同&阀座号&的疏水量有很大差别。

The numerical results show that as the truncation parameter increases the actual focus shifts towards the lens and the spot size becomes larger gradually.

数值结果显示，由于透镜的孔径对高斯光束的截断使得焦点向着透镜迁移，截断参数愈大，焦移量愈大，成像光斑愈大。

At present, there are drilling more than 150 plants, with an annual output of various drilling about 1 million units, export over 20 million units, the drilling of speed through a pulley shift to resolve the pagoda, the governor need to stop the process, open the protective Enclosures, manual transmission, and other procedures, the process cumbersome and poor security, and is governing, not transferred to the spindle speed corresponding to the different materials of various aperture drilling at the best speed, the production efficiency is low.

目前，全国有钻床厂150多家，年产各种钻床100万台左右，出口20多万台，这些钻床的变速都是通过一对宝塔皮带轮换档解决的，调速过程需要停车、打开防护罩，手工换档等程序，操作过程繁琐且安全性差，并且是有级调速，不易使主轴转速调到对应于不同材质的各种孔径钻削时的最佳转速，因此生产效率也低。

And this method can effectively correct the space variant phase error in low frequency UWB SAR image, which is induced by the long synthetic aperture and large swath.

该方法有效地补偿大合成孔径、宽测绘带低频UWB SAR图像中的二维空变相位误差。

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。