نتایج جستجو برای: vacuum pump
تعداد نتایج: 109041 فیلتر نتایج به سال:
This manuscript deals with the implementation of active noise and vibration control systems on very high-speed computational architectures, more specifically on Field Programmable Gate Arrays (FPGA). Starting from a particular application, namely the vibration control of a turbomolecular vacuum pump, general design considerations are devised. A feedforward controller is designed based on multip...
TRuTH IS more likely to come out of error than confusion. Lavoisier's assumption that combustion occurred in the lungs did not go unchallenged, but blood gas analysis remained uncertain until the physicist, Gustav Magnus, introduced a reliable vacuum pump. Physiologists, from Bernard and Ludwig down, joined in the investigation, and then, just as tissue metabolism was established, came Haldane'...
A scavenging system which can be attached to a variety of anaesthetic machines and ventilators is described. Gas venting can occur via a central vacuum system, a suitable injector, fan or pump, through the exhaust duct of an air-conditioning system, or by a passive system. The resistance and back pressures applied to the anaesthetic apparatus are negligible. Leakage tests showed that the collec...
The Coherent X-ray Imaging (CXI) instrument specializes in hard X-ray, in-vacuum, high power density experiments in all areas of science. Two main sample chambers, one containing a 100 nm focus and one a 1 µm focus, are available, each with multiple diagnostics, sample injection, pump-probe and detector capabilities. The flexibility of CXI has enabled it to host a diverse range of experiments, ...
an experimental study has been made of the hydrodynamics of a stage mixer-settler to obtain appropriate design information. in this paper several tests were done according to full factorial design of experiments with high reliability, since each test recurs seven times and the results of them are very close to each other(p=1bar and t=25 °c). sauter diameter in each test is determined with phot...
Ultimate pressure of a well-designed vacuum system very much depends on pretreatments, processing and procedures [1, 2]. Until now much attention has been paid to minimizing hydrogen outgassing from the vacuum chamber wall materials, however, procedures and processing deserve further scrutiny. For reducing the gas load, high sensitivity helium leak detection techniques with sensitivities better...
INTRODUCTION Two factors have major influences on maple sap yields: vacuum level achieved at the taphole and taphole drying. Vacuum controls sap yield by increasing the pressure differential between the inside of the tree and the inside of the tubing system, resulting in higher sap flows from tapholes than would be found without vacuum (Heiligmann et al. 2006, Chapeskie and Staats 2006, Wilmot ...
an experimental study has been conducted on the hydrodynamics of a stage mixer-settler to obtain an appropriate design. in this paper several tests was performed to investigate full factorial design of experiments. since each test was repeated seven times, the repeatability of the test was confirmed (p=1 bar and t=25 °c). sauter diameter was determined by photographing both the mixer and settle...
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