The amplitude modula- tion screening,frequency modulation screening,and hybrid screening technologies were introduced through comparing and analyzing advantage and disadvantage of different screening technologies.

The research of digital screening technology on the existing conditions in recent years was summarized including amplitude modulation screening,frequency modulation screening,and hybrid screening.

As an important technology of RIP,quality of computer screening algorithm has a direct effect on reproduction result,an approach to improvement of reproduction result and algorithm is explored through discussing and experimenting on computer random screening,FM screening and hybrid screening.

Assessment of pollution of heavy metals in soils of Tianjin suburb land was done by a mixed weighted model and the results were compared with Nemerow index.

Study of a kind of hybrid encryption system based on both stream and block ciphers;

And a kind of hybrid encryption,i.

Since the secrecy,integrity and anti-denial are needed for the important information transmission of electric power system,a hybrid encryption and digital signature algorithm based on symmetric key encryption algorithm IDEA,public-key algorithm RSA and secure hash function MD 5 is proposed.

Physical modeling of broadband pulsed laser amplification process based on hybrid-widened linewidth;

Effect of technology parameters for SiC on the temperature-raising characteristics in microwave hybrid heating;