Conclusion
According to Jilin’s five-year plan, renewable energy development is an important issue for government. The selection of renewable energy can be regarded as an MCDM problem. This paper presents an MCDM method with linguistic hesitant fuzzy sets, which combines hesitant fuzzy sets with linguistic fuzzy sets to express the complexity of uncertain environment and the vagueness of human cognition. The proposed approach uses cloud model to handle the randomness and fuzziness from the subjective judgments of experts and defines an improved Choquet integral operator to aggregate LHFSs in consideration of the interdependency of criteria. In terms of Jilin, the most suitable renewable energy is biomass energy, followed by wind energy, hydro energy and solar energy. Subsequently, we adopt three criteria to test the method and compare the method with other methods, verifying the validity and superiority of the proposed method. The main contributions of this paper are: (1) It introduces LHFS to express the evaluation information of renewable energy MCDM problem, which is the first application of LHFS in renewable energy selection. (2) It defines an improved Choquet integral operator to aggregate LHFSs. Based on the defined operator and cloud model, a new MCDM method with universality is proposed, which can be applied to not only renewable energy selection problem but also other MCDM problems. (3) It uses the concept of comprehensive cloud instead of the deviation of decision results by extending the shorter LHFS.