Holding time 1 min at 615～595 ℃ and isothermal holding at 600 ℃ about 1～10 min for A356 Al alloy, the evolution characteristics of semi-solid primary phase about A356 Al alloy at different isothermal holding temperatures and time were investigated.

The evolution characteristics and formation condition of Goose-Head pattern diverged channels in the middle and lower Yangtze River;

To understand the mechanism of the ENSO cycle,based on the SODA data set by the University of Maryland,the evolution characteristics of the subsurface temperature anomaly in the equatorial Pacific of the two pattern ENSO events are analyzed by the case study and the composite m.

The abandoned croplands with different years in erosion environment were selected to study the evolution feature of soil biological characteristics by analyzing soil microbe biomass and soil respiration intensity.

The characteristics of flood disaster evolution in the Weihe River valley are analyzed.

We can use evolution feature of these systems to adjust dynamically measurement of rainfall with Z - R relations.

Space-time distribution and evolvement characteristics of summer precipitation in yellow river were diagnosed and analyzed by EOF and REOF based on every summer precipitation data of 44 stations from 1978 to 2005.