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nanalyzer

v5.0.0

Published

The node.js implement of IKAnalyzer Chinese Segmenter.

Downloads

4

Readme

Build Status npm version NPM Downloads

node-analyzer

基于 IKAnalyzer 字典分词器的 node.js 实现

安装

  npm i node-analyzer

用法

test.js

  var Segmenter = require('node-analyzer');
  var segmenter = new Segmenter();
  
  var txt = '1995年10月,他与中方探讨了在海运、造船方面合作的可能与途径。';
  console.log('txt: ', txt);
  
  var result = segmenter.analyze(txt);
  console.log('result: ', result);
  
  // result:  1995年 10月 , 他 与 中方 探讨 了 在 海运 、 造船 方面 合作 的 可能 与 途径 。

效果

对 Backoff 2005 的测试语料 pku_test.utf8,msr_test.utf8 结果如下:

msr_test.utf8:

标准词数:106873 个,正确词数:79516 个,错误词数:20638 个
标准行数:3985,正确行数:302 ,错误行数:3683
Recall: 74.4023279968%
Precision: 79.3937336502%
F MEASURE: 76.817033527%
ERR RATE: 0.193107707279%

pku_test.utf8:

标准词数:104372 个,正确词数:75045 个,错误词数:18985 个
标准行数:1944,正确行数:206 ,错误行数:1738
Recall: 71.9014678266%
Precision: 79.8096352228%
F MEASURE: 75.6494390178%
ERR RATE: 0.181897443759%

评分代码:

http://blog.csdn.net/mg1616/article/details/45545919

虽然准确率不高,但是考虑测试语料的标准分词也有不合理的地方,并且网络的快速发展,近年也出现不少新鲜词汇,所以这个效果应该是比较令人满意的。

性能

 初始化耗时:1094ms
 分词速度:358778.63 字/秒, 900763.36 字节/秒, 字数:1880000,耗时:5240ms
 

用最新版本的 io.js 2.02 测试时,耗时减少到50%,分词速度达到 50w字/秒