The former one can efficiently combat channel fading while its spectral efficiency is low [8, 9].
However, the PV panel efficiency is low.
Their efficiency is low, and applications are restricted to small power ratings.
Incandescent tungsten-filament lamps are used mostly for accent lighting, since their light-output efficiency is low.
Savonius rotors require a low torque for starting, but their efficiency is low.
However, the diffusion based mixing process is very slow and the efficiency is low.
And its thermal efficiency is low and formula sometimes is misused.
The trend in productivity could be stronger than official data suggest, because much of the country's recent growth has been in the construction industry, where efficiency is low.
What they said: "At start-up and extremely low speeds when fuel efficiency is low, such as when driving the car into a garage, the rear electric motor is primarily used, which allows driving without engaging the gasoline engine.
However, the maximization of extracted power from PV system is a matter of concern as its conversion efficiency is low.
It was found that the presence of the emitter tip apex does not alter the EOT resonance but the net excitation efficiency is low when the emitter tip is placed at the center of the aperture.
