气腔

Based on numerical simulation,the effect of base aerator on the length of lateral cavity has been analyzed.

侧空腔长度对射流挟气量及水流流态均有重要影响，采用3维数值模拟，分析了底部掺气坎尺寸对侧空腔长度的影响规律。

The static model of torsion joint is based on that of bending joint. The effects of structure parameters inside air pressure, initial angle, rube average radius, rube shell thickness on the turning angle are analyzed and the following conclusions are drawn: the relationship between the angle of torsion joint and the inside air pressure is basically linear, the angle of torsion joint increases with the initial angle and rube average radius, the angle of torsion joint decreases while the rube shell thickness increases. The kinetic equation is built for torsion joint. Simulating experiment implies that the time of inflating and deflating process is extremely shorter than that of kinetic process. So the pneumatic process can be ignored in actual system design and control. The factors that affect the dynamic features of torsion joint, such as shell thickness of rubber tube, average radius, initial angle, connector's outlet area, moment of inertia and viscous damping coefficient, are analyzed and the following conclusions are drawn: the change of rube shell thickness has no effects on the dynamic process of FPA inside air pressure while greatly affects the turning angle of torsion joint; when the rube shell thickness is small, the torsion joint has a bigger turning angle, no overshoot and long risetime, when the shell thickness is big, the turning angle of torsion joint is small, but has high response speed, overshoot and low shock; when the rube average radius increases, the turning angle of torsion joint increases and the overshoot increases too; when the initial angle of torsion joint is big, the turning joint is big, the overshoot is small and shock is low, but the risetime is big; the connector's outlet area affects the dynamic process of FPA inside air pressure greatly, but has no effects on the dynamic process of turning angle; moment of inertia and viscous damping coefficient have no effects on the dynamic process of FPA inside air pressure, but affect the dynamic process of turning angle greatly.

在弯曲关节模型推导的基础上，建立扭转关节的静态模型，并分析了扭转关节内腔压力，初始转角，橡胶管平均半径，橡胶管壁厚等参数对关节转角的影响，得出扭转关节的转动角度与充入FPA内腔的压缩气体压力之间基本呈线性关系，扭转关节的转角随初始角度和橡胶管平均半径的增大而增大，扭转关节的转角随橡胶管壁厚的增大而减小的结论；建立了扭转关节的动力学方程，仿真实验表明FPA的充放气过程与扭转关节的动力学过程相比时间极短，在实际系统设计和控制过程中可以忽略不计；分析讨论橡胶管壁厚，平均半径，初始角度，气体节流口面积，转动惯量，粘性阻尼系数等因素对扭转关节动态特性的影响，得出橡胶管初始壁厚的变化对扭转关节FPA内腔压力的动态响应几乎没有影响而对关节转角的响应曲线影响比较明显，壁厚较小时，关节可以得到较大的转角，并且转角的响应曲线没有超调，但上升时间长，壁厚较大时，关节转角变小，响应加快，但是有超调和轻微振荡现象，橡胶管平均半径越大，得到的关节转角越大，但是转角响应的超调量也随之增大，FPA的初始角度越大，关节的转角越大，并且超调量减小，振荡减弱，但是上升时间增大，管接头出口面积的大小对关节FPA内腔压力的建立过程影响较大，但对关节转角的动态响应几乎没有影响，转动惯量和粘性阻尼系数对FPA内腔压力的动态过程几乎没有影响而对扭转关节转角有较大影响等结论。

According to the diffusion theory and the principle of material equilibrium, the dissolution velocity ...

结果表明，在合理的工艺条件下，通过盐岩水溶开采可以获得稳定的腔体形态，以满足地下储气库的要求，从而为盐穴储气库的溶腔设计提供理论依据和决策手段。

The main purposes of this study are to develop a method to control pollutant dispersion and to measure the control efficiency during the chamber preventative maintenance of a metal etcher.

实验以固定流量的1000 ppm追踪气体SF6在腔底连续释放，以了解反应腔的气罩效率或反应腔上方全开，在侧边视窗孔抽气时对污染物逸散的控制效率。

Results show that pollutant dispersion of a metal dry etcher during preventive maintenance can be effectively controlled by side venting at a large flow rate near the chamber top whether the chamber is fully open or with the hood. Good agreement between the experimental data and the simulation results is obtained. The SF6 concentration at the breathing zone was also found to be lower than the detection limit of the FTIR spectrometer.

研究结果显示，不论反应腔上方全开或上方有气罩时在反应腔上方进行大量抽气，可有效地控制危害性气体的逸散，模拟的控制效率结果与实验数据相符合，且发现在人员呼吸带的SF6浓度均低於FTIR之侦测下限。

There are large numbers of brine-extracted cavern s which can be reconstructed as the nature gas storage in the exploited salt mine.

由于已采盐矿存在着大量的采卤溶腔群，对采卤溶腔群进行改造作为天然气储存库使用，能有效缩短储气库的建设周期，并消除采卤溶腔对环境带来的不利影响。

The capability of thin-setion CT for detecting basicranial fracture line is superior to regular CT.

薄层CT能清晰显示颅底骨折线、颅内积气及窦腔积液，常规CT未见明显颅底骨折线，仅见颅内积气及窦腔积液，5例薄层CT扫描阴性患者排除颅底骨折诊断。

Pneumocephalus and sinus hydrops were detected by thin-setion CT scan and regular CT scan , Thin-setion CT scan can clearly revealed basicranial fracture line while regular CT scan can not.

薄层CT能清晰显示颅底骨折线、颅内积气及窦腔积液，常规CT未见明显颅底骨折线，仅见颅内积气及窦腔积液，5例薄层CT扫描阴性患者排除颅底骨折诊断。

Other unusual cases may be associated with pneumopericardium, subcutaneous emphysema, splenic abscess, tension pneumothorax, gastropleural fistula, gastrobronchial fistula, gastropancreatic fistula, gastroenteral fistula, and penetration into the heart and aorta.

其它不常见的包括：心包膜腔积气、皮下气肿、脾脏脓疡、张力性气胸、胃肋膜腔唱管、胃支气管唱管、胃胰脏唱管、胃肠道间唱管以及造成心脏或主动脉穿孔。

When pneumomediastinum and loculated pleural effusion are encountered on chest radiography, the possible origins of the air should include thoracic organ invasion by gas-forming bacteria.

临床上，当胸部X光片发现纵膈腔气肿和多处肋膜积水时，我们要把会侵犯到胸腔器官的产气细菌当作可能造成气肿的来源。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！