Machine Learning 基础 SGD 《机器学习（周志华）》笔记 MLA 2016 南京 笔记 工具包 TensorFlow学习笔记 技巧 Person Re-id Person Re-identification CVPR2016 Re-id Camera topology and Person Re-id Deep transfer learning Person Re-id 集成学习 多模态数据融合 增强学习