9. The system according to claim 7 , wherein said system further comprises: additional one or more processors, one or more computer-readable memories and one or more computer-readable, tangible storage devices; and an extending module configured to extend towards both sides from the position of said chemical name segments until meeting non-chemical name segments, so as to obtain the chemical names.
7. A system comprising: one or more processors, one or more computer-readable memories and one or more computer-readable, tangible storage devices; a receiving module configured to receive a Chinese document including chemical names; a first recognizing module configured to recognize chemical name segments in said document; a second recognizing module configured to recognize non-chemical name segments in said document, wherein said second recognizing module comprises: a word-segmenting module configured to segment said document into words; a first checking module configured to check whether each segmented word is in a non-chemical name segment dictionary; a first determining module configured to, provided that said segmented word is in said non-chemical name segment dictionary, determine said segmented word to be a non-chemical name segment; and a second recording module configured to record position information of said non-chemical name segment; and a combining module configured to combine said chemical name segments to get said chemical names based on said recognized chemical name segments and non-chemical name segments to recognize said chemical names in Chinese documents, wherein said first recognizing module comprises: a sentence-segmenting module configured to segment said document into sentences; a matching module configured to match all of said chemical name segments appearing in sentences of said document based on a chemical name segment dictionary; a matching module configured to record position information of said chemical name segments; and a reducing module configured to reduce said chemical name segments in a same sentence, wherein reducing said chemical name segments in a same sentence is performed according to a principle of matching the most chemical name segments with the least number of chemical name segments, and wherein said combining module further comprises: a second determining module configured to determine adjacent chemical name segments in a same sentence according to said position information of said chemical name segments; a second checking module configured to check whether there are non-chemical name segments between said adjacent chemical name segments based on said position information of said chemical name segments and non-chemical name segments; and a combination executing module configured to, provided that there are no non-chemical name segments between said adjacent chemical name segments, combine said adjacent chemical name segments to get a chemical name.