The key technology of cognitive radio is to detect the primary users.

In order to satisfy the interference constraint from secondary user to primary user and maximize secondary user\' s transmission rate,the optimal power allocation scheme based on convex optimization theory is proposed.

In cognitive radio network,cognitive users(secondary users)must continuously monitor the spectrum to find the presence of the primary user.

The public interests clause of Anti-dumping Agreement should be further perfected,expanding the relevant stake in the square range,putting emphasis on dumping the interests of the industrial user of the products,so as to prevent Anti-dumping Agreement from becoming.