The tight sandstone gas has huge objective reserves in China and great potential for development. Sulige field is the largest China. To prevent hydrates reduce surface pipeline pressure, downhole throttling technology been widely used field, Since wells are prone to liquid accumulation during production, installation of chokes makes phenomenon more complicated, traditional methods difficult sim...

This study presents a thermodynamic model for determining the entrainment ratio and double choke limiting pressure of supersonic ejectors within the context of heat driven refrigeration cycles, with and without droplet injection, at the constant area section of the device. Input data include the inlet operating conditions and key geometry parameters (primary throat, mixing section and diffuser ...

Patients with chronic heart failure (CHF) exhibit orthopnoea and tidal expiratory flow limitation in the supine position. It is not known whether the flow-limiting segment occurs in the peripheral or central part of the tracheobronchial tree. The location of the flow-limiting segment can be inferred from the effects of heliox (80% helium/20% oxygen) administration. If maximal expiratory flow in...

This paper presents CMOS integrated electrical over stress (EOS) protection circuit for USB2 transceiver. A unique full speed SE0 state in USB2 standard protocol produces overshoot and undershoots in presence of on board choke. The purpose of choke is to minimize EMI for USB2 differential signalling. This works fine as long as data signalling is differential. In the presence of SE0 state, singl...