It has following merits: with large strength, stability in strength and in structure, rather active under low temperature, easy to be sulfured, easy to regeneration, acceptable price etc.
The forming process and active mechanism of the Generalized-Gradient theory can be simplified as it's of the duality structure from high gradient to low gradient in space.
广义梯度推移过程及其作用机理可简约为“高梯度—低梯度二元空间结构”的形成、作用机理及其演化过程。
3
In the paper aiming at the problem of low frequency noise transmission through double panel structure, feedback active noise control technique is adopted to control noise transmission.