TY - JOUR TI - On the semi-inverse method and variational principle AU - Li Xue-Wei AU - Li Ya AU - He Ji-Huan JN - Thermal Science PY - 2013 VL - 17 IS - 5 SP - 1565 EP - 1568 PT - Article AB - In this Open Forum, Liu et al. proved the equivalence between He-Lee 2009 variational principle and that by Tao and Chen (Tao, Z. L., Chen, G. H., Thermal Science, 17(2013), pp. 951-952) for one dimensional heat conduction. We confirm the correction of Liu et al.’s proof, and give a short remark on the history of the semi-inverse method for establishment of a generalized variational principle.