Self-adaptive resource allocation for cloud-based software services based on progressive QoS prediction model

College of Mathematics and Computer Science, Fuzhou University, Fuzhou 350116, China; Fujian Key Laboratory of Network Computing and Intelligent Information Processing, Fuzhou 350116, China; School of Software, Tsinghua University, Beijing 100084, China; College of Physics and Energy, Fujian Normal University, Fuzhou 350117, China; Key Laboratory of High Confidence Software Technologies, Ministry of Education, Beijing 100871, China