Study on approximate heat transfer analysis of uniform annular fin based on regular perturbation method;

By using regular perturbation method, the optimum geometric dimensions of the uniform annular finnedtubes are studied in order to obtain the maximum heat transfer in a definite volume when the heat and mass transfer isoccurred under frosting conditions.

We present a new method for studying the subthreshold characteristics of nano-scaled MOSFETs,which we call the “regular perturbation method”.

By using normal perturbation method with reasonable boundary conditions, the paper resolves a partial differential equation of the two-dimensional potential of four-terminal silicon pressure transducers, and the analytical expression of the two-dimensional potential is derived accordingly.

The directional solidification in binary system by the small Reynolds number far field flow is studied by the normal perturbation,and the influence of impurity concentration to the temperature field and solid-liquid interface is considered.

In this paper, non_symmetrical large deformation problem of a shallow conical shell is studied by two_parameter perturbation method.

A hyperbolic perturbation method was presented for determining the homoclinic and heteroclinic solutions of certain strongly nonlinear autonomous oscillators in the form+c_1x+c_3x~3=εf(μ,x,x), in which the hyperbolic functions can be employed instead of the usual periodic functions in the usual perturbation procedure.