Based on a study of the geological characteristics of Babaoshan copper deposit,this paper emphatically analyzed the application of induced polarization method in prospecting.

Application of a laser measurement method in measuring the modulus of elasticity in tension parallel to grain of Cryptomeria japonica D.Don structural lumber.;

Investigation of maximum entropy method for minmax problems(Ⅱ);

By the maximum entropy method, the approximate solution to the primal can be found.

By using the idea that a complicated problem can be approximated by a simple and easily solved one so that a complicated nondifferentiable problem can be solved by solving a simpler differentiable one, the structure of a maximum entropy method for solving a class of multiobjective minimax problems is studied.

The existence and multiplicity results are obtained for a class of fourth-order nonlinear elliptic equations by the least action principle and the minimax methods,respectively.