نتایج جستجو برای: flowmeter
تعداد نتایج: 1129 فیلتر نتایج به سال:
This paper deals with the demonstration of non-uniformity velocity profiles in a DN 200 air circular pipe as part development newly designed tomographic ultrasonic flowmeter. The flowmeter should measure flow quality independently. Therefore, different aerodynamic conditions were created by placing mechanical obstacles at entrance measuring chamber, and these experimentally verified. As an expe...
BACKGROUND Greater occipital nerve block is used in the treatment of headaches and neuralgia in the occipital area. We evaluated the efficacy of ultrasonic doppler flowmeter-guided occipital nerve block in patients experiencing headache in the occipital region in a randomized, prospective, placebo-controlled study. METHODS Twenty-six patients, aged 18 to 70, with headache in the occipital reg...
The dynamic response characteristics of flowmeters are often not considered when selecting a flowmeter for use in flow control applications. It is generally assumed that slow controller sample rates make flowmeter response a moot issue. This assumption is shown to be incorrect. It is demonstrated that the use of faster responding flowmeters will always result in reduced process variability, reg...
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