Research on urban open space plan based on recreation theory Research on urban defense space based on crime hot spot mapping research on optimal design methods based on counterfactual theory Research on error elimination of lending information based on error elimination theory Research on English translation teaching based on error analysis theory Research on executive perquisite behaviours based on limited attention theory Research on green space plan in urban planning area Research on urban green space pattern optimization based on stormwater regulation-storage potential Research on the values of youth based on the postmodernization theory Research on calligraphy creation theory