气升

Gas lift is one of the most widely used artificial lift methods in the world.

气举采油是世界上使用最为广泛的人工举升方式之一。

Based on the movement of the valve train of internal combustion engine, cam profile for high performance engines was developed by employing a poly nominal expression with eight items.

多项动力凸轮升程函数的项数，应根据内燃机配气机构的运动要求寻找独立的边界条件来确定。

As the piston rises again on the compression stroke the charge is compressed and ignited, and the cycle begins again.

当活塞再度升向压缩冲程时，混合气被压缩并点燃，循环再度开始。

In addition, volumetric efficiency and the in-cylinder pressure behavior during the intake and compression stroke were obtained and compared with the experimental data.

在容积效率、进气与压缩两冲程之缸内压力方面，其数值模拟值与实验值两者间所显示之差异在5%以内；此外，对三组最大进气阀升程之模拟，其所得之容积效率值在趋势上系属合理。

The system includes Valvetronic mechanism and VANOS mechanism,which can continually adjust valve timing and lift in a dimension.

该系统包括Valvetron ic机构和VANOS机构，能够在一定的范围内连续调节气门的正时与升程，实现发动机的无节气门负荷调节，降低了发动机的泵气损失，改善了发动机的性能。

For currently extensively applied of the cam drive intake and exhaust system, its valve timing and valve lift is settled, which is a compromise for different working conditions.

目前广泛应用的凸轮驱动的进排气系统其配气定时和升程都是固定的，是一种应对不同工况下不同需求的折中方案。

The system include Valvetronic mechanism and VANOS mechanism, it continually adjusts valve timing and lift in a dimension.

该系统包括Valvetronic机构和VANOS机构，能够在一定的范围内连续调节气门的正时与升程，实现发动机的无节气门负荷调节，降低了发动机的泵气损失，改善了发动机的性能。

The design includes: valve timing and high valve lift confirm, valve lift design and cam lift.

凸轮型线设计包括：配气相位及最高升程的确定、气门升程设计及其凸轮型线的反求。

According to the comparison of test results of the new unit and the old one, it can meet the precision requirements. Moreover the temperature can be above 700℃, which can offer the high temperature circumstance demanded by catalytic pyrolysis, and overcome the shortcoming of temperature below 600℃offered by the old unit. The gas is collected by water displacement, and the resistant can be largely minished by extending the pipe diameter.

装置建立后，新建实验装置与原装置相比，数据的重复性和精度都能满足要求；且对反应器体积和加热炉均进行了改进，克服了原装置温度不能超过600℃的缺点，可将温度升至700℃以上；在集气过程中采用排水法，通过增大管径，大幅度地降低了排水阻力。

Kinematic and dynamic calculations are carried out, and the features of intake and outtake valve train are got. Especially, the area of fullness ratio of the valve lift curve, cam to tappet contact stress, lubrication coefficient and the features of valve seating are analyzed.

在此基础上分析了配气机构进排气部分的工作特性，着重从气门升程曲线的丰满系数、凸轮与平面挺柱间接触应力，凸轮与平面挺柱间润滑效果以及气门落座特性等方面进行了分析。

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％。