The Fourier Transform of a projection at angle θ is a line in the Fourier transform of the image at the same angle. If (l, θ) are sampled sufficiently dense, then from g (l, θ) we essentially know F(u,v) (on the polar coordinate), and by inverse tran

微网存在两种典型的运行模式：离网模式和并网模式。同时，两种模式之间的切换也应该实现无缝切换。考虑 到采用主从控制以实现无环流的微网中主变换器在微网中的重要地位，本文采用V/f电压控制做为离网时变换器控制方法， 通过逐步调整变换器输出电压使其跟随电网电压实现离网到并网的无缝切换；-There are two typical micro-grid operation modes: off-grid and grid mode mode. At the same time, switching

Voltage-to-Frequency/Frequency-to-Voltage Converter. One of the most difficult circuits to build is one which will divide one analog signal by another. Two voltage-to-frequency (V/F) converters can do such division with ease. The numerator is cou