Human action understanding is generally divided into three fundamental sub-processes:feature extraction and motion representation,activity recognition and higher level activity and scene understanding.

The authors suggest:((1)The) mechanism of speed coupling effect might be explained in terms of compensating for the delay of response,supplying necessary viewing time,utilizing instantaneous information or speed-accuracy tradeoffs;(2)the interception of hands is influenced by motor direction of the target,previous tasks,practice,the target size,motion representation,strategy,and.

Then,the motion characteristics of the Xianshuihe fault were analyzed.

Analysis on motion feature of the No.1 landslide at a hydropower station on Yellow River;

Study of motion feature representation and extraction techniques for video semantic analysis;

Study on Motion Feature of Rockfalls;

It is suggested that investigation be focused on major characteristics of the debris flows,including formation conditions,movement characteristics,imperilment,and development trends,and investigation domain be confined to gulch valley of debris flows.

From Lianglong landslide growth stage feature,and according to characteristic of the sliding process,the movement feature was divided into main sliding zone,liquid state zone and flowing zone.

Based on the geological hazard investigation in the Liubeichi district and combining the terrain condition and geomorphic characteristics of the slope, the representative sections are selected for modeling analysis of dangerous rock movement characters.

On basis of detailed geological research,this essay particularly analyzes the development charac- teristics and movement characteristics of debris flow in Shuida Channel.