Principle and clinical application of dual-input CT perfusion in lung Principles and clinical application for electroconvulsive therapy Principles and practical application of English translation Principle and tactical application of aero magnetic detection in submarine search Principle and application of data mining Technique and clinical application of single-operator colonoscopy Development and clinical application of external diaphragm pacing for 30 years Principle and application of accounting information system Principle and application of visual communication Principle and application of intelligent connected vehicle