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在相对论σ-ω模型的单圈图近似下，详细推导了核物质的能量密度和压强密度表达式，数值计算了核物质的结合能和压强随核密度的变化，并分别在热力学和流体力学的理论框架下，计算了核物质的压强密度，结果表明这两种方法得到的压强密度相同．
Under the approximation of the unicyclic graph of the relativistic σ-ω model, the energy density and pressure density expression of nuclear matter are deduced in detail. The binding energy and pressure of nuclear matter are numerically calculated with the change of nuclear density. In the thermodynamics and hydrodynamics Under the theoretical framework, the pressure density of nuclear matter was calculated. The results show that the pressure density obtained by these two methods is the same.