Identification of key core topics in the prevention and control of marine oil spill pollution based on patent co-occurrence
Patent data were collected by searching key words in the field of prevention and control of marine oil spill pollution from patent retrieval system of China national intellectual property administration and Derwent innovation index database respectively.Firstly,hot topics were identified by construction of patent co-occurrence matrix based on IPC classification information.Secondly,core topics were identified from hot topics by calculating patent relatedness and cross-impact indexes after construction of related matrix.Potential core topics were further identified by calculating growth potential rate.Finally,key core topics were identified by calculating and sorting structure hole value of core and potential core topics.The results show that key core topics include oil-water separation,agent supplement,adsorption and microbial degradation in the field of prevention and control of marine oil spill pollution.This research will provide a meaningful insight into the development of technology in this field.
NETL
NSTL
万方数据
