The instantaneous point source in the solid proliferation solution was obtained with the method transforms with Fourier, also obtains the instant line source and the instant plane source diffusion equation with the point source iteration method in the solid proliferation solution.

Based on the internal emission of the medium,the pseudo source adding method is applied to investigate the apparent spectral emission of a semi transparant medium layer with a semi transparent specular surface and an opaque diffuse substrate.

According to the internal thermal emission of the medium,a new method,pseudo source adding method,is presented to analyze the apparent emissivities of semi\|transparent medium layers.

The apparent spectral emission of a semi transparent medium layer with a sine shaped surface was analyzed by the pseudo source adding method.

In this paper, the way of linearity superposition of controlled source as exeitation source is analysised, and the establishing of sparaity matrix is studied by example,furthermore computer network assistant anslysising is researched simply.

In this paper,we describe the state equation substitution—superposition method in linear circuit.

The performance of an ATM multiplexer is studied,the superposition of its multiply input ON-OFF sources is modeled by a poisson process with group arrivals.