1. College of Computer Science & Information Engineering, Guangxi Normal University, Guilin 541004, China
2. Guangxi Key Lab of Multisource Information Mining & Security, Guilin 541004, China
3. Guangxi Academy of Specialty Crops/Guangxi Citrus Breeding and Cultivation Engineering Technology Center, Guilin 541004, China
4. Agricultural Information Institutes of Science and Technology, Shanghai Academy of Agriculture Sciences, Shanghai 201403, China