철도시설분야 특허맵을 통한 기술변화분석

초록

Railway system is thing which technology field that is many is synthesized. Technology of each field had been guided by different age, different corporations. This research achieved by virtue analysis to propel advance into overseas markets of our railway industry. Analyzed technology market's inclination and change, and foreign country or other firm's main technical development tendency about railway civil engineering field. Railway civil engineering field divides and achieved special permission analysis by track, bridge, tunnel and ambient noise.