课程demo
- 来到杨过曾经生活过的地方,小龙女动情地说:“我也想过过过儿过过的生活。”
- 你也想犯范范玮琪犯过的错吗
- 校长说衣服上除了校徽别别别的
- 这几天天天天气不好
- 我背有点驼,麻麻说“你的背得背背背背佳
#stop word
DELETE my_index
PUT /my_index/_doc/1
{ "title": "I'm happy for this fox" }
PUT /my_index/_doc/2
{ "title": "I'm not happy about my fox problem" }
POST my_index/_search
{
"query": {
"match": {
"title": "not happy fox"
}
}
}
#虽然通过使用 english (英语)分析器,使得匹配规则更加宽松,我们也因此提高了召回率,但却降低了精准匹配文档的能力。为了获得两方面的优势,我们可以使用multifields(多字段)对 title 字段建立两次索引: 一次使用 `english`(英语)分析器,另一次使用 `standard`(标准)分析器:
DELETE my_index
PUT /my_index
{
"mappings": {
"blog": {
"properties": {
"title": {
"type": "string",
"analyzer": "english"
}
}
}
}
}
PUT /my_index
{
"mappings": {
"blog": {
"properties": {
"title": {
"type": "string",
"fields": {
"english": {
"type": "string",
"analyzer": "english"
}
}
}
}
}
}
}
PUT /my_index/blog/1
{ "title": "I'm happy for this fox" }
PUT /my_index/blog/2
{ "title": "I'm not happy about my fox problem" }
GET /_search
{
"query": {
"multi_match": {
"type": "most_fields",
"query": "not happy foxes",
"fields": [ "title", "title.english" ]
}
}
}
#安装插件
./elasticsearch-plugin install https://github.com/medcl/elasticsearch-analysis-ik/releases/download/v7.1.0/elasticsearch-analysis-ik-7.1.0.zip
#安装插件
bin/elasticsearch install https://github.com/KennFalcon/elasticsearch-analysis-hanlp/releases/download/v7.1.0/elasticsearch-analysis-hanlp-7.1.0.zip
#ik_max_word
#ik_smart
#hanlp: hanlp默认分词
#hanlp_standard: 标准分词
#hanlp_index: 索引分词
#hanlp_nlp: NLP分词
#hanlp_n_short: N-最短路分词
#hanlp_dijkstra: 最短路分词
#hanlp_crf: CRF分词(在hanlp 1.6.6已开始废弃)
#hanlp_speed: 极速词典分词
POST _analyze
{
"analyzer": "hanlp_standard",
"text": ["剑桥分析公司多位高管对卧底记者说,他们确保了唐纳德·特朗普在总统大选中获胜"]
}
#Pinyin
PUT /artists/
{
"settings" : {
"analysis" : {
"analyzer" : {
"user_name_analyzer" : {
"tokenizer" : "whitespace",
"filter" : "pinyin_first_letter_and_full_pinyin_filter"
}
},
"filter" : {
"pinyin_first_letter_and_full_pinyin_filter" : {
"type" : "pinyin",
"keep_first_letter" : true,
"keep_full_pinyin" : false,
"keep_none_chinese" : true,
"keep_original" : false,
"limit_first_letter_length" : 16,
"lowercase" : true,
"trim_whitespace" : true,
"keep_none_chinese_in_first_letter" : true
}
}
}
}
}
GET /artists/_analyze
{
"text": ["刘德华 张学友 郭富城 黎明 四大天王"],
"analyzer": "user_name_analyzer"
}
相关资源
- Elasticsearch IK分词插件 https://github.com/medcl/elasticsearch-analysis-ik/releases
- Elasticsearch hanlp 分词插件 https://github.com/KennFalcon/elasticsearch-analysis-hanlp
- 分词算法综述 NLP分词算法深度综述 - 知乎
一些分词工具,供参考:
- 中科院计算所NLPIR http://ictclas.nlpir.org/nlpir/
- ansj分词器 https://github.com/NLPchina/ansj_seg
- 哈工大的LTP https://github.com/HIT-SCIR/ltp
- 清华大学THULAC https://github.com/thunlp/THULAC
- 斯坦福分词器 The Stanford Natural Language Processing Group
- Hanlp分词器 https://github.com/hankcs/HanLP
- 结巴分词 https://github.com/yanyiwu/cppjieba
- KCWS分词器(字嵌入+Bi-LSTM+CRF) https://github.com/koth/kcws
- ZPar https://github.com/frcchang/zpar/releases
- IKAnalyzer https://github.com/wks/ik-analyzer