free energy functional

例句：

1. 1. The new model uses a free energy functional to optimize the system's performance.
   新模型使用一个自由能功能来优化系统的运行性能。
2. 2. The researchers developed a free energy functional that can predict the behavior of complex systems.
   研究人员开发了一种自由能功能，可以预测复杂系统的行为。
3. 3. The study used a free energy functional to investigate the effects of different environmental conditions on the system's stability.
   研究使用了自由能功能来研究不同环境条件下对系统稳定性的影响。