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用热场动力学方法计算了核物质中核子有效质量随密度的变化关系．利用有限密度中核子质量的改变，在Ｘ重新标度模型的基础上，讨论了不同核的结构函数的比率Ｒ（ｘ），与实验结果相符合．还考察了ＥＭＣ效应和Ｂｒｏｗｎ—Ｒｈｏ猜测之间的关系．
Thermal field dynamics method was used to calculate the nuclear material in the effective mass of nuclear changes with the density. On the basis of the X-rescaled model, the ratio R (x) of the structural functions of different nuclei is discussed, which is consistent with the experimental results by using the change of the nucleon mass in the finite density. Also examined the relationship between the EMC effect and Brown-Rho guess.