extraction unit meaning in English

浸提器

Recently , with downhole enterprises coming off from oil - extraction units , they begin to take the parts in which they serve for oil - extraction enterprises
近年来，随着井下作业单位从采油单位的逐步剥离，井下作业企业对原油生产企业的服务地位开始确立。
Recent research has demonstrated the strong performance of hidden markov model applied in information extraction . however , the information extraction based on hidden markov model generally takes a token as a basic extraction unit , and the information of format and list separators is not taken into account . based on the natural structure of text , a block - based hidden markov model is provided
目前基于隐马尔科夫( hmm )信息抽取模型一般以单词作为基本抽取单位，考虑到文本排版格式、分隔符等信息的存在，文本实际上可以看作是由一些文本分块序列组成，同一分块内的所有单词只可能属于同一个状态，而不同分块可以属于一个或多个状态。