Studies on the isolation,identification and pathogenic characteristic of Porcine Reproductive and Respiratory Syndrome Virus of Sichuan Strains;

Virulence and pathogenicity of avian paramyxovirus of type 1 strain YH_(99) V isolated from duck;

Discover on shigellosis of flock in China and studies on the pathogeny speciality;

For GPS rapid positioning only by a few epochs observations,the normal equations using least-square principle are seriously ill-conditional,and the observation noise is inevitable,which cause float solution of ambiguities has large deflection compared with the accurate solution.

the ill-conditioned problems are widely being in the Geodesy and other engineering fields,take GPS rapid static positioning for example,because of the tiny time intervals,the design matrix is ill-conditioned for accepting no enough data information.

Based on TIKHONOV regularization theorem,a new regularizer,which has explicitly physical meaning,is chosen to mitigate the ill-condition of the normal matrix.