Study on Ultrasonic Sensor Data Fusion
song daojin jia yongxin(journal of shandong university of technology; zibo 255091; china)tang qingchen(jining teachers college; jining 272025; china)
List-coloring of Wheel Graph
shi shaojian1 zhang xuefeng2 wang xiaoyi1(1.shandong university of technology; zibo 255091; china; 2.zibo deparment of technology subervise; zibo 25500; china)