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