http://139.196.53.116/ml/index.php/action/login?_=ee92935fb857c871e34478a71f0fdbb6
https://baijiahao.baidu.com/s?id=1673906753788009342&wfr=spider&for=pc
https://blog.csdn.net/qq_35912930/article/details/107152217?spm=1001.2101.3001.6661.1&utm_medium=distribute.pc_relevant_t0.none-task-blog-2%7Edefault%7EBlogCommendFromBaidu%7Edefault-1.pc_relevant_without_ctrlist&depth_1-utm_source=distribute.pc_relevant_t0.none-task-blog-2%7Edefault%7EBlogCommendFromBaidu%7Edefault-1.pc_relevant_without_ctrlist&utm_relevant_index=1
https://wenku.baidu.com/view/66680498eff9aef8941e06f8.html?rec_flag=default&fr=Recommend_RelativeDoc-80252,80166,110235,80139,80163,110192,80251-kpdrec_doc_pc_view-90054bb25a0216fc700abb68a98271fe900eaf5c&sxts=1651738228807
https://zhuanlan.zhihu.com/p/267722955
https://zhuanlan.zhihu.com/p/163807527
导数(类似于泰勒一阶近似)
解析几何https://mp.weixin.qq.com/mp/appmsgalbum?action=getalbum&__biz=MzI2OTE2NzczNQ==&scene=1&album_id=1800276101995233287&count=3#wechat_redirect
!!!向量化