1. College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi, China
2. Dipartimento di Ingegneria Industriale, Università degli studi di Salerno, Fisciano, SA, Italy
3. Departments of Biological Systems Engineering and Food Science & Technology, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
4. Department of Biological Systems Engineering, Washington State University, Pullman, Washington, USA