Several typys of alkali-aggregate reaction and its mechanism was introduced, then the essential conditions of the reaction were also pointed out.

In this paper,by using reflective function method for secondary nonlinear differential system,we obtain secondary nonlinear differential system to have the linear reflection function necessary and sufficient condition and the essential condition.

The effects of monsoon wind stress, continental slope topology andbottom friction as essential conditions to form monsoon upwind flow and as diagnosticcriteria are discussed.

Necessary Condition of Establishing Auto-regression Model and It′s Application;

A necessary condition for a class of elliptic equations with Allee effect

Our systematic and in-depth study arrives at the full conditions and necessary conditions for the existence of double cranks of a 2-DOF planar five-link linkage.

It was pointed that mechatronic-hydraulic-communicatory hardware, the controlling and management software of mixing process are the two necessary conditions of the intelligent mixer.

This article discusses of the extreme the dual function,the existence of the dual function With examples,the necessary conditions and the functionals steps by esamples.

A group of necessary conditions for minimax controls of a class of retarded Volterra type integral systems with state terminal constraints are derived.