Early-warning and prediction technology of harmful algal bloom: A review Review on detection of critical transition in ecosystems Advances in theories and methods of energy forecasting and early warning Early-warning model based on extension analysis for ecological security and its application: case study of Shaanxi Province Study on early-warning model based on variable weight-matter element analysis for ecological security in old industrial bases:a case study of Jilin Province Progress in earthworm biomarker studies and theirs applications in soil pollution risk assessment Study on early-warning of Chinese materia medica price base on ARMA model Construction and application of early-warning index system to calamity of Parasa consocia Walker