In this paper,the metal displacement incremental function in the deformation zone on plug drawing mill can be estimated with extreme value principle.

elliptic maximum principle and krein-Rutman theory with parabolic maximum principle and operator semigrou;

Generalization of Aleksandrov-Bakel man-Pucci-Krylov-Tso maximum principle and its application to viscosity solutions;

From basic equations of PMSM in d-q reference frame,d and q axis currents and nonlinear torque equations were derived using maximum principle.

Slope stability analysis using extremum principle by Pan Jiazheng and harmony search method;

In the paper, the incremental function of strain and displacement of themetallic deformation region can be defined by the functional equilibrium method of extremum principle when workpiece is extruded through the cone mould.

The relation formulas of d,q axis currents and torque were derived via extremum principle and a simplified approximate algorithm was also given in order to satisfy the engineering application.

Using the maximum principle,we give the location of the quenching points for the solution for a degener- ate parabolic equation,and we also show the estimate of the quenching time.

By application of Hopf s maximum principles,authors have studied a class of equations in divergence form.

By means of maximum principles and Hopf boundary lemma, the prior estimates of the strict positive solutions are given at first.

The maximum principles for functions which are defined on solutions of semilinear elliptic equations u+f(x,u,q)=0(q=|u|~2)subject to Dirichlet boundary conditions u=0 were studied by using Hopf s maximum principle,the estimate of gradient q was obtained.