Most people wouldn't think that it would take rigorous mathematical proof to show how many folds it takes to make a donut shape out of paper. Yet, no one could quite figure it out until recently. How ...

"我的RAG召回率只有40%，已经把Chunk大小调到512了，混合检索也加了，还是不行，到底哪里出问题了？"我说你把相似度计算方式发来看看。 前段时间一个学员在群里问： "我的RAG召回率只有40%，已经把Chunk大小调到512了，混合检索也加了，还是不行，到底哪里出 ...

For nearly 80 years, mathematicians have struggled to solve a classic geometry puzzle first posed by Paul Erdős in 1946: the planar unit distance problem. The question posed by the legendary Hungarian ...