Endo, E.; Tamura, Y. - In: Renewable Energy 15 (1998) 1, pp. 523-526
correlation between R&D expenditures and conversion efficiency improvement. In the analysis, instead of R&D expenditures, expected … conversion efficiency improvement, which is defined as product of cost efficiency from the viewpoint of conversion efficiency … improvement and actual R&D expenditures, is used. Based on results of the analysis, expected and actual conversion efficiency …