THE BI-TIME-PARAMETER REPRESENTATION OF EQUATION OF HEAT CONDUCTION

In this paper, the time variable τ is expressed in two parameters, from which the bi-time-parameter equation of heat conduction is derived. Dealing with the diurnal variations of soil temperature, the analysis solution of the progressive temperature wave is obtained. Thus, the non-linear distributions of the mean daily temperature varying with the depth of soil is introduced and the linear distribution expression usually adopted but unconformably in solution of the equation is improved.