中文摘要：

采用完全计数（Exact Enumeration）方法对金刚石格点链的构象：进行精确枚举，计算构象的末端距平方R^2和回转半径平方S^2与非球形因子A之间的关系．结果表明：关联系数CA,R^2和CA,S^2与链长的倒数n^-1均有非常好的线性关系；排斥体积效应使关联系数CA,R^2和CA,S^2增大．与简立方格点上的Monte Carlo模拟结果比较后发现，长链极限的CA,R^2和CA,S^2与格点类型无关，但有限长度链的CA,R^2和CA,S^2依赖于格点类型，其值与格点的近邻数有关，近邻数增加则CA,R^2和CA,S^2减小．

英文摘要：

The conformations of a linear chain on the using the exact enumeration method. The correlation three-choice tetrahedral lattice were accurately enumerated by between the square end-to-end distance R^2 and the aspherieity parameter A and the correlation between the square radius of gyration S^2 and A were computed for chain lengths from 10 to 23. It was concluded that both the correlation coefficients CA,R^2 and CA,S^2 are proportional to the reciprocal of the chain length n 1, which is an assumption obtained from previous Monte Carlo simulations for longer chains. The correlation coefficients CA,R^2 and CA,S^2 were found to be increased by the excluded volume among chain segments. The limits of CA,R^2 and CA,S^2 at large chain lengths are independent of the lattice model, but CA,R^2 and CA,S^2 of finite chain lengths depend on the lattice model： they decrease with the increase of the number of the nearest neighbors of lattice model.