The quantum chemistry structural parameters of 17 lubricant additives of N-containing heterocyclic derivatives with the matrices of benzoxazole,benzimidazole,benzothiazole,thiazoline and piperazine were calculated by Hartree-Fock ab initio quantum chemistry method.Quantitative structure-tribo-ability relationship(QSTR)of the coefficient of friction and quantum chemistry structural parameters was analyzed by multiple linear regression (MLR) method.A QSTR model of good fitting and predicting effects was established.It was shown that the total...