1. Professor, School of Management Engineering, Shandong Jianzhu Univ., Jinan 250101, China.
2. Postgraduate, School of Management Engineering, Shandong Jianzhu Univ., Jinan 250101, China (corresponding author).
3. Postgraduate, School of Management Engineering, Shandong Jianzhu Univ., Jinan 250101, China.