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.

Print Uniformity of Corrugated Board in Flexo Printing:Effects of Corrugated Board and Halftone Dot Deformations

The article describes the characteristics and process of halftone colour effect by screen printing on fabric and elaborates in detail the processing methods and skills of each working procedure.

With the development of screen printing technology, textile halftone printing becomes the main method in garment decora- tion.

Study on pattern modification of low Permeability reservoir for improving recovery factor;

Densitometers were not able to read the FM screening reliably,therefore we can not use the traditional Murray-Davies model of density on FM halftoning.

Color conversion model of FM halftoning was established.

In consideration of its characteristics, different measures are taken for well pattern adjustment and tapping the potential at different production stages.

Through integral well pattern adjustment, the producing level of waterflooding is raised in the reservoirs of category I and II, with 12% of waterflooding producing level increase, 5.

The traditional well pattern adjustment technologies such as infill drilling and subdivision of series of strata are not suitable in the circumstances.