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NOSQL 그래프 데이터베이스의 패턴매칭에 의한 경로분석
최효석(Choi, Hyo-Seok),염재홍(Yom, Jae-Hong) 한국측량학회 2013 한국측량학회 학술대회자료집 Vol.2013 No.4
Recently, various service based on the road network are produced due to increasing user of smartphone use and the development of location based services. Road network is constructed using nodes and links. and network is built using a relational database. However, the relational database to store the network structure is not suitable, analysis function can be slow depending on the size of database. In this paper, a road network is built and route analysis experiments were carried out using conventional GIS routing algorithm, and using graph database which is one of NOSQL models which enable high-capacity high-speed processing. The shortest-path analysis and pattern matching analysis was performed. As the result of comparing the two approaches, the road network built using the graph database proved to be more suitable than that which was built using relational database.
이중명(Jung Myoung Lee),안은별(Eun-Byeol Ahn),최효석(Hyo-Seok Choi),류지애(Ji-Ae Ryu),엄태진(Tae-Jin Eom) 한국펄프·종이공학회 2018 펄프.종이技術 Vol.50 No.5
We compared the characteristics of the three LMCFs (lignin rich micro-cellulosic fines) prepared by microwave irradiation, oil bath treatment and high pressure steam treatment from pine wood powder. The residual lignin contents of the LMCFs prepared by the three methods were almost similar but the yields were different. The microwave irradiation method hydrolyzed the pine wood powder more greatly compared to the other methods. So, the LMCFs prepared by microwave irradiation showed the lowest particle size and the least amount of hydroxyl groups but, showed the highest total crystallinity index. It was found that the LMCFs prepared by the three methods were similar in morphology but different in content of aromatic ring and carbonyl group. Based on these results, LMCFs could be produced efficiently depending on the manufacturing time, energy cost, and uniformity of micronized samples. It was concluded that the high pressure steam treatment method, which produces the uniform production of LMCFs as the purpose, is the optimum micronization method.