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테라바이트급 데이터를 축적.검색표시할 수 있는 문서관리 시스템 - 3D 그래픽과 화상검색 및 DVD 체인저 제어기술의 융합 -
임길홍,신전박지,정상충사,목촌효사,도본출,이등호청,북정독지,Yoshihiro, Mori,Hiroyuki, Nitta,Mitsuji, Inoue,Koji, Kimura,lzuru, Shimamoto,Hiroharu, Ito,Atsushi, Kitamachi 한국과학기술정보연구원 과학기술정보센터 2001 Journal of Information Science Theory and Practice Vol.32 No.1
컴퓨터, 디지털 카메라, 스캐너 등을 이용하여 문서나 화상을 작성한다든지, 서류 데이터를 디지털 데이터로 만드는 것이 일반화되고 있다. 그 결과 축적된 디지털 데이터가 가속도적으로 증가하고 있다. 부서단위, 회사단위로 생성되는 방대한 디지털 데이터를 단순히 파일로서, 공유 서버에 축적하는 것은 양적으로도, 이용효율 면에서도 한계에 달하고 있다. 이러한 문제들을 해결하기 위해서 다양한 검색(자기조직화 화상검색 전문검색(全文檢索) 관련검색) 기술과 DVD 체인저 제어기술, 3차원 그래픽 기술을 통합한 문서관리 시스템을 구축하였다. 이 시스템에 의해 테라바이트 급 데이터를 간단히 축적 검색 표시, 나아가서 Web을 통합하여, 광범위하게 데이터를 보낼 수 있게 되었다. Creating digital document by scanning paper or using a digital camera or using a computer is a daily task at every office. Digital document is increasing at high pace. The quantity of digital document is almost beyond the maximum capacity of the online storage and is destroying searching efficiency. To solve these problems, we developed a document management system(ChronoStar) by integrating various searching methods(Picture, Full-Text Related), 3D graphic and a DVD changer.
Drift displacement data based estimation of cumulative plastic deformation ratios for buildings
Akira Nishitani,Chisa Matsui,Yushiro Hara,Ping Xiang,Yoshihiro Nitta,Tomohiko Hatada,Ryota Katamura,Iwao Matsuya,Takashi Tanii 국제구조공학회 2015 Smart Structures and Systems, An International Jou Vol.15 No.3
The authors’ research group has developed a noncontact type of sensors which directly measurethe inter-story drift displacements of a building during a seismic event. Soon after that event, suchseismically-induced drift displacement data would provide structural engineers with useful information tojudge how the stories have been damaged. This paper presents a scheme of estimating the story cumulativeplastic deformation ratios based on such measured drift displacement information toward the building safetymonitoring. The presented scheme requires the data of story drift displacements and the ground motionacceleration. The involved calculations are rather simple without any detailed information on structuralelements required: the story hysteresis loops are first estimated and then the cumulative plastic deformationratio of each story is evaluated from the estimated hysteresis. The effectiveness of the scheme isdemonstrated by utilizing the data of full-scale building model experiment performed at E-defense andconducting numerical simulations.
Oki, Yuichi,Tanaka, Toru,Takamiya, Koichi,Osada, Naoyuki,Nitta, Shinnosuke,Ishi, Yoshihiro,Uesugi, Tomonori,Kuriyama, Yasutoshi,Sakamoto, Masaaki,Ohtsuki, Tsutomu The Korean Association for Radiation Protection 2016 방사선방어학회지 Vol.41 No.3
Background: Very fine radiation-induced aerosol particles are produced in intense radiation fields, such as high-intensity accelerator rooms and containment vessels such as those in the Fukushima Daiichi nuclear power plant (FDNPP). Size measurement of the aerosol particles is very important for understanding the behavior of radioactive aerosols released in the FDNPP accident and radiation safety in high-energy accelerators. Materials and Methods: A combined technique using wire screens and imaging plates was developed for size measurement of fine radioactive aerosol particles smaller than 100 nm in diameter. This technique was applied to the radiation field of a proton accelerator room, in which radioactive atoms produced in air during machine operation are incorporated into radiation-induced aerosol particles. The size of $^{11}C$-bearing aerosol particles was analyzed using the wire screen technique in distinction from other positron emitters in combination with a radioactive decay analysis. Results and Discussion: The size distribution for $^{11}C$-bearing aerosol particles was found to be ca. $70{\mu}m$ in geometric mean diameter. The size was similar to that for $^7Be$-bearing particles obtained by a Ge detector measurement, and was slightly larger than the number-based size distribution measured with a scanning mobility particle sizer. Conclusion: The particle size measuring method using wire screens and imaging plates was successfully applied to the fine aerosol particles produced in an intense radiation field of a proton accelerator. This technique is applicable to size measurement of radioactive aerosol particles produced in the intense radiation fields of radiation facilities.
Drift displacement data based estimation of cumulative plastic deformation ratios for buildings
Nishitani, Akira,Matsui, Chisa,Hara, Yushiro,Xiang, Ping,Nitta, Yoshihiro,Hatada, Tomohiko,Katamura, Ryota,Matsuya, Iwao,Tanii, Takashi Techno-Press 2015 Smart Structures and Systems, An International Jou Vol.15 No.3
The authors' research group has developed a noncontact type of sensors which directly measure the inter-story drift displacements of a building during a seismic event. Soon after that event, such seismically-induced drift displacement data would provide structural engineers with useful information to judge how the stories have been damaged. This paper presents a scheme of estimating the story cumulative plastic deformation ratios based on such measured drift displacement information toward the building safety monitoring. The presented scheme requires the data of story drift displacements and the ground motion acceleration. The involved calculations are rather simple without any detailed information on structural elements required: the story hysteresis loops are first estimated and then the cumulative plastic deformation ratio of each story is evaluated from the estimated hysteresis. The effectiveness of the scheme is demonstrated by utilizing the data of full-scale building model experiment performed at E-defense and conducting numerical simulations.