منابع مشابه
Building Power Between Polarities
Keynote I lift both my hands up, from my lap to chest height, turn them palms up, and say, " This is why we have two hands. In one we hold hope. " I look at one palm, and then turn my gaze to the other. " In the other, reality. " My hands, momentary measures of meaningfulness, move ever so slightly, one up, one down, each in opposition to and in rhythm with the other. I continue. " We all have ...
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Recently, the frequency and severity of natural and man-made disasters (extreme events), which have a high-impact low-frequency (HILF) property, are increased. These disasters can lead to extensive outages, damages, and costs in electric power systems. A power system must be built with “resilience” against disasters, which means its ability to withstand disasters efficiently while ensuring the ...
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Recent developments in photovoltaic components, small-scale combined heat and power systems and ducted wind turbines have opened up the possibility for an embedded generation approach to building design. In conjunction with demand reduction measures, embedded generation encourages a new design paradigm based on matching local supply to demand. For building simulation programs to offer effective...
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Putting Power in the Antenna Figure 2 is the block diagram of an experimental single-band 36 dB gain 5 W linear amplifier that may be easily constructed using whatever output device is available. Two noteworthy differences between Figure 2 and other commonly published circuits are the use of a resistive attenuator and low-pass filter between the driver and final stage, and the floating ground a...
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ژورنال
عنوان ژورنال: The Lancet
سال: 2021
ISSN: 0140-6736
DOI: 10.1016/s0140-6736(20)32756-2