According to the present invention, particle configuration is represented in terms of {HEAD ~ a coefficient} of {TAIL ~ particle configuration} 
According to the present invention , particle configuration is represented in terms of { HEAD ~ a coefficient } of { TAIL ~ particle configuration }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL