Computation formulas of microchannel heat exchanger heat transfer area are presented. So are the heat transfer coefficient correlations which are suitable for microchannels.
The relationship of the scattering area, the scattering intensity, the transmit loss and the directivity of the beam with the received angle in the same condition is studied.
3
给出曲面积分在空间坐标的正交变换下的一个计算公式。
A calculating formula for surface integrals under orthogonal transformation of space coordinates is given.