School of Economics and Management;
North China Electric Power University;
Beijing 102206;
China;
Beijing Key Laboratory of New Energy and Low-Carbon Development;
North China Electric Power University;
Beijing 102206;
China;
Department of Mathematics;
University of Toronto;
Toronto M5S 1A1;
ON;
Canada;
investment; options; small-scale; photovoltaic; systems; cumulative; prospect; theory; Choquet; integral; intuitionistic; trapezoidal; fuzzy; numbers;