#77 Brownian Carnot engine-I 微觀卡諾引擎-I on January 26, 2017 Carnot engine classical mechanics Hamiltonian thermodynamics +
#54Fundamentals--Fraunhofer diffraction-I 常識集_夫朗和斐繞射_上 on June 23, 2016 Fourier transform Fraunhofer diffraction Huygens principle optics spatial frequency +
#50常識集_Dirac_delta_function on June 09, 2016 Dirac delta function Dirac delta sequence Heaviside step function +