用MonteCarlo方法模拟了三维简立方格点和面心立方格点上的线性高分子模型自踪迹规避(Self AvoidingTrail,SAT ) .求解了SAT的各种临界指数 .所得的结果显示 ,SAT的各种临界指数介于无规行走 (RW )和自避行走 (SAW )之间 .这完全是因为体排斥作用对SAT模型的限制比对SAW的限制要少一些 ,但又比对RW的限制要大一些 .SAT的各种性质介于SAW和RW之间 .因此 ,有可能SAT与SAW不属于同一个普适类 The Monte Carlo method was used to simulate the linear self-tracking model (SAT) of three-dimensional simple lattice points and face-centered cubic lattice points. Various critical indices of SAT were obtained. The results showed that all kinds of SAT The critical index is between that of RW and SAW, which is entirely due to the fact that the body rejection limits the SAT model to a lesser degree than the SAW but to a lesser extent than the RW Some of the various properties of SAT are between SAW and RW Therefore, it is possible that SAT and SAW do not belong to the same universal category