ELK Stack
Elasticsearch, Logstash and Kibana
Elasticsearch
Elasticsearch is a NoSQL database.When you feed data into Elasticsearch, the data is placed into Apache Lucene indexes.
Apache Lucene
Apache Lucene™ is a high-performance, full-featured search engine library written entirely in Java.
API
Logstash
Using more than 50 input plugins for different platforms, databases and applications, Logstash can be defined to collect and process data from these sources and send them to other systems for storage and analysis.
project
https://trecpodcasts.github.io/
https://doc.yonyoucloud.com/doc/mastering-elasticsearch/chapter-2/21_README.html
https://cloud.tencent.com/developer/article/1600163
https://www.elastic.co/cn/blog/how-to-improve-elasticsearch-search-relevance-with-boolean-queries
https://www.elastic.co/guide/en/app-search/current/relevance-tuning-guide.html
https://medium.com/mlearning-ai/enhancing-information-retrieval-via-semantic-and-relevance-matching-64973ff81818
https://www.elastic.co/cn/blog/how-to-improve-elasticsearch-search-relevance-with-boolean-queries
https://bigdataboutique.com/blog/optimizing-elasticsearch-relevance-a-detailed-guide-c9efd3
NDCG：
https://www.javatips.net/api/MyMediaLiteJava-master/src/org/mymedialite/eval/measures/NDCG.java