نتایج جستجو برای: power measurement
تعداد نتایج: 908168 فیلتر نتایج به سال:
The Iranian Light Source Facility (ILSF) project is the first large scale accelerator facility which is currently under planning in Iran. On the basis of the present design, circumference of the 3 GeV storage ring is 528 m. Beam current and natural beam emittance are 400 mA and 0.477 nm.rad, respectively. Some prototype accelerator components such as high power solid state radio frequency ampli...
We present the first measurement results of a power sensor for radio Pequency ( r j signals (50 kHz 40 GHz) with almost no dissipation during the measurement. This sensor is, therefore, a ‘through’power sensor, that means that the rfsignal is available during the measurement of its power. The power detection has been realized by measuring capacitively the movement of a grounded aluminum membran...
Abstrac t In the paper a virtual instrument for power quality measurement and research is proposed. The instrument is divided in several modules which provide generation, measurement and recording of the typical power quality (PQ) disturbances such as: harmonics, voltage dips, interruptions, flicker, unbalance etc. The virtual instrument allows setting different measurement parameters which exp...
The total output power from a medical ultrasound transducer has to be measured due to various reasons but in general they are related to assessment of performance and safety of equipment. The objective of this work was to develop a primary level ultrasonic power measurement system to establish standards for ultrasonic power measurement in Thailand. This system is being set up at the National In...
We consider the problem of a sensor network tracking a moving target that exhibits a Markov model of mobility. The sensor nodes have adjustable power levels and the precision of the measurement of the target location depends on both the relative distance from the target to the measuring sensor, and on the sensing power level used by that sensor. An important issue in sensor networks is the powe...
oxygen free radicals may be implicated in the pathogenesis of ischemia reperfusion damage. as the antioxidant effects of some species of pistacia have been reported, the protective effects of pistacia vera l. gum extract (0.1-0.5 g/kg) on oxidative damage following cerebral ischemia were studied in rats. ischemia was induced using four-vessel occlusion model and evaluated using measurement of m...
this paper presents a new control method for a three-phase four-wire unified power quality conditioner (upqc) to deal with the problems of power quality under distortional and unbalanced load conditions. the proposed control approach is the combination of instantaneous power theory and synchronous reference frame (srf) theory which is optimized by using a self-tuning filter (stf) and without us...
an important issue in power generation and petrochemical industries is the monitoring of pipe wall thickness and corrosion/erosion rate. the pipes are usually subject to erosive and/or corrosive environments and any failure could be catastrophic. while periodic manual ultrasonic thickness measurement is the common practice in many industries, in certain cases, where higher accuracies are requir...
چکیده این پایان نامه به بررسی اثر سیم پیچ مغناطیسی و کاوه یِ خوشه گر با بسامد رادیویی بر هاله و بیرونگراییِ باریکه هایِ پیوسته و خوشه ایِ ذرات باردار در شتابدهنده های خطیِ یونی، پروتونی با جریان بالا می پردازد و راه حل هایی برای بهینه نگهداشتن این کمیتها ارایه می دهد. بیرونگرایی یکی از کمیتهای اساسی باریکه هایِ ذرات باردار در شتابدهنده ها است که تاثیر قابل توجهی بر قیمت، هزینه و کاراییِ هر شتابدهند...
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