On the Position of Regional Tourist Development——The Case of Xuzhou City
ma xiao dong 1; shen zheng ping 2; liang hu qing 2 (1.department of urban and environmental sciences; xuzhou normal university; xuzhou 221009; 2.department of urban and resource sciences; nanjing university; nanjing 210093; china)
Land Geoenvironmental Regionalization of Guangdong Coast by Fuzzy Mathematics
yan man cun 1; wang guang qian 1; li bao sheng 2; li hua mei 3 (1.department of hydraulic engineering; tsinghua university; beijing 100084; 2.department of geography; south china normal university; guangzhou 510631; 3.guangzhou institute of ge