间隙

Based on the characteristics of phasing switch, the dielectric recovery characteristics for short gap vacuum arc were discussed, a vapor density model was applied under the special boundary conditions to get some relations between arcing time and the surface temperature, vapor density.

讨论了真空短间隙及其对应的短燃弧时间对相控真空开关介质恢复特性的影响，应用金属蒸汽密度模型和不同的间隙边界条件，得到燃弧时间与电极表面温度、金属蒸汽密度的关系。

Tests were carried out using ±1 000 kV simulation tower in this paper, and switching impulse and lightning impulse flashover characteristic curves of typical air gap in ±1 000 kV transmission tower were obtained. These curves were compared with test results of ±500 and ±800 kV air gap, and the flashover characteristic of 750 kV AC transmission tower and square tower window were also discussed in this paper.

利用±1 000 kV模拟塔头进行试验，得到了±1 000 kV杆塔典型空气间隙的操作冲击和雷电冲击放电特性曲线，并与±500和±800 kV杆塔塔头的空气间隙研究成果进行对比分析，同时结合750 kV 交流杆塔塔头和正方形塔窗的操作冲击特性进行了讨论和分析。

In order to understand better the process of hydrocarbon formation and the effect of the top land crevice and the oil layer of the cylinder liner on unburned hydrocarbons during cold start and idling period,the temperature of piston top land and liner has been measured.

为了更好地弄清起动和怠速时发动机缸内未燃碳氢生成过程以及顶岸间隙和油膜对缸内未燃碳氢的影响，测量了起动和怠速过程活塞顶岸壁面和缸套壁面温度。根据测量结果，预测了起动过程顶岸间隙和壁面油膜处未燃碳氢生成量，发现顶岸和缸套壁温在发动机起动后（150～200）s时达到其稳定状态。

Results ①Of 82% OSAHS patients' sleep indices were normal after the oral appliance therapy;②Compared to the control group,the patients with OSAHS had narrower upper-posterior airway volume and shorter distance from tip of the uvula to the posterior pharyngeal wall and lower positioned hyoid bone and shorter tongue before treatment;③Compared to before treatment,the OSAHS patients after therapy had lower positioned and shorter and flatter tongue,the upper hyoid bone,more anterior and downward mandibular and wider upper-posterior airway volume.

结果 ①82%患者治疗后睡眠指标达正常标准；②与配对组相比OSAHS患者上气道后间隙及悬雍垂尖至咽后壁距较窄，舌骨至下颌平面距较大，舌较短；③戴入口腔矫治器后患者舌体下降，舌变短而平坦，舌骨上移，下颌骨前下方移位，上气道后间隙扩大，与配对组比较，除舌体下移外其它测量项目值差异无显著性。

Results ①Of 82% OSAHS patients' sleep indices were normal after the oral appliance therapy;②Compared to the control group,the patients with OSAHS had narrower upper-posterior airway volume and shorter distance from tip of the uvula to the posterior pharyngeal wall and lower positioned hyoid bone and shorter tongue before treatment;③Compared to before treatment,the OSAHS patients after therapy had lower positioned and shorter and flatter tongue,the upper hyoid bone,more anterior and downward mandibular and wider upper-posterior airway volume.In comparison to control subjects,the indices were almost the same except for the lower positioned tongue.

结果 ①82%患者治疗后睡眠指标达正常标准；②与配对组相比OSAHS患者上气道后间隙及悬雍垂尖至咽后壁距较窄，舌骨至下颌平面距较大，舌较短；③戴入口腔矫治器后患者舌体下降，舌变短而平坦，舌骨上移，下颌骨前下方移位，上气道后间隙扩大，与配对组比较，除舌体下移外其它测量项目值差异无显著性。

The calculation and experiment results show that the maximum lifting pressure performance decreases with the increase in throat diameter of channel of variable section, water flux of low pressure and pressure ratio of steam nozzle, and has its minimum value with water nozzle annular space. The coefficient of maximum lifting pressure performance may be as high as 26. In the design of steam injector, the larger pressure ratio of steam nozzle and the smaller water nozzle annular space are selected, the higher lifting pressure performance could be obtained.

计算及研究表明：极限升压能力随变截面混合腔喉部直径、被升压的低压水流量和蒸汽喷嘴压比增加而降低，随环形水喷嘴间隙的变化出现了最小值；计算得出变截面超音速汽液两相流装置的极限升压能力可达26；在设计升压装置时应尽可能选取较大的蒸汽喷嘴压比和较小的环形水喷嘴间隙。

The opening of the valve body in a leading role in the orientation of any reciprocating parts, in the active pieces into fixed at the minimum radial clearance of not less than 0.7mm, valves should be in a spy state, the activities of parts and fixed parts Minimum radial clearance of A42C Type Pound-Grade Low Lift Spring Loaded Safety Valve not less than 0.125mm.

阀体中对阀的开启起主导作用的任何往复运动的导向零件，在活动件进人固定处的最小径向间隙不应小于0.7mm，阀处于伺应状态时，活动件与固定件的最小径向间隙不应小于0.125mm。

The opening of the valve body in a leading role in the orientation of any reciprocating parts in the active pieces into fixed at the minimum radial clearance of not less than 0.7mm valves should be in a spy state the activities of parts and fixed parts Minimum radial clearance ofA42C Type Pound-Grade Low Lift Spring Loaded Safety Valve not less than 0.125mm.

阀体中对阀的开启起主导作用的任何往复运动的导向零件，在活动件进人固定处的最小径向间隙不应小于0.7mm阀处于伺应状态时，活动件与固定件的最小径向间隙不应小于0.125mm。

And as an example, dynamic simulation of a slider crank with clearances is given.

通过仿真数据，得到以下结果：与理想无间隙机构相比，含间隙机构稳定性较差。

For each nut, and screw all gap exists, but in General, there is no gap and screw.

差每个螺母来说与丝杠都有间隙活命，但是从个体来说与丝杠操纵间隙。

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。