In the present invention, the place of occurrence of abnormality is estimated from the momentary positions of {TAIL ~ moving objects} and the moving directions of {HEAD ~ these objects} 
In the present invention , the place of occurrence of abnormality is estimated from the momentary positions of { TAIL ~ moving objects } and the moving directions of { HEAD ~ these objects }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD