（英文污水文献）Yuan2010_Article_PatentActivityOnWaterPoll
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2019-03-19 08:57:52
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Yuan2010_Article_PatentActivityOnWaterPollutionPatentactivityonwaterpollutionandtreatmentinChina—ascientometricperspectiveJunPengYuan•WeiPingYue•ChengSu•ZhengWu•ZhengMa•YunTaoPan•NanMa•ZhiYuHu•FeiShi•ZhengLuYu•YiShanWuReceived:18November2009/Accepted:23November2009/Publishedonline:5December2009�Akade´miaiKiado´,Budapest,Hungary2009AbstractThisresearchintendstoinvestigatethepatentactivityonwaterpollutionandtreatmentinChina(1985–2007),andthencomparestheresultswithpatentsdataaboutTriadicpatents,SouthKorea,BrazilandIndiaoverthesameperiods,patentsdatawerecollectedfromDerwentWorldPatentsIndexbetween1985andMay2008.Forthisstudy,169,312patentswerechosenandexamined.Totalvolumeofpatents,technologyfocus,assigneesector,prioritydateandthecomparisonwithothercountriesareanalyzed.ItisfoundthatpatentsonwaterpollutionandtreatmentfiledatChinahaveexperiencedaremarkableincreaseandtheincreaserateofpatentsfiledatChinachangesimultaneouswiththepercentageofdomesticapplications.However,thenumberofhighqualityTriad
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