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Target Transformation Factor Analysis에 의한 겹침 X-선 형광 스펙트라의 정량적 해석
김승원,이철,최상원,강형태,Kim Seungwon,Lee, Chul,Choi Sang Won,Kang Hyung Tae 대한화학회 1992 대한화학회지 Vol.36 No.5
겹쳐 나타나는 X-선 형광 스펙트라에서 얻은 다변수 데이타를 해석하기 위하여 다변수분석법인 인자분석법을 적용하였다. Pb와 As의 피크가 겹쳐 있는 11개 표준시료의 X-선 형광 스펙트라를 파장분산형기기로 $33.50∼34.50^{\circ}$에서 측정하였다. 8개 시료의 피크세기로 데이타 매트릭스를 구성하고 AFA(Abstract Factor Analysis)를 수행하였다. 그 결과 인자의 수가 3으로 나타났으며 표준시료에 함유된 8개 원소를 타겟트 테스트한 결과 Pb, As 및 Cu로 판명되었다. 농도 기지인 시험시료에서 상기 원소들의 농도를 피크의 겹침에 무관하게 TTFA(Target Transformation Factor Analysis)에 의해 결정하였다. Multivariate analysis such as factor analysis was applied to interpret multivariate data, which were obtained from the overlapped X-ray fluorescence spectra. X-ray fluorescence spectra of 11 reference samples were obtained by the wavelength dispersive spectrometer at a specified range of angle such as $33.50∼34.50^{\circ}$. The data matrix was made from the spectra of 8 samples. The results of abstract factor analysis gave three factors. By the target testing with 8 elements contained in the reference samples, the three factors were found to be Pb, As and Cu. The concentration of these elements in the test samples was determined by target transformation factor analysis regardless overlapping individual peaks.
지능형 홈네트워크에서 네트워크 기반의 이동성 지원을 위한 P2P-SIP 구조의 설계 및 성능분석
김승원,정종필,Kim, SeungWon,Jeong, JongPil 한국정보처리학회 2013 정보처리학회논문지. 컴퓨터 및 통신시스템 Vol.2 No.7
홈네트워크 사업자는 빠르게 확대 되는 시장 환경에 맞춰 확장성, 신뢰성, 유연성, 저비용의 구조로 홈네트워크 서비스를 제공하는 것에 대해 많은 고민을 하고 있다. 기존 클라이언트-서버 방식은 홈네트워크를 서비스하는데 있어 복잡성, 고비용 등 다양한 문제가 존재한다. 본 논문에서는 이러한 문제를 해결하기 위한 P2P-SIP(Peer to peer - Session Initiation Protocol) 구조를 제안한다. 분산된 자원의 접근을 지원하는 P2P(Peer to peer) 통신 방식의 단말에서 기존의 SIP(Session Initiation Protocol)기반 네트워크 장치들이 가지던 기능을 제공한다. 또한 단말의 이동성을 고려한 네트워크 기반의 PMIPv6(Proxy Mobile IPv6)기술을 적용하여 이동성 관리에 따른 지연시간을 최소화한다. 특히 제안하는 P2P-SIP 구조는 평면 구조에 비해 지역 내 다양한 홈네트워크 간의 뛰어난 확장성과 유지비용을 절감하는 매우 효율적인 구조임을 보여줬다. Home network providers have many worries about providing home network services with an expandable, reliable, flexible and low-cost structure according to the expanding market environment. The existing client-server system has various problems such as complexity and high costs in providing home network services. In this paper we propose the P2P-SIP structure. P2P communication terminal supporting access of distributed resources provides functions which the existing SIP-based network devices have. Because diverse terminals in a home network access through networks, also, partitioning network domains with home gateways to manage, and applying the network-based PMIPv6(Proxy Mobile IPv6) technology considering mobility of terminals would help to have a more efficient home network structure. Especially, the proposed P2P-SIP structure proves itself as a very efficient structure to have an outstanding expandability among different home networks in a region, and to reduce maintenance costs.
바이패스 타입 self-switchable 엔진마운트 개발
김승원(Seungwon Kim),심현진(Huounjin Sim),이병곤(Byeonggon Lee) 한국자동차공학회 2021 한국자동차공학회 부문종합 학술대회 Vol.2021 No.6
In high-end vehicles, electronic control mounts are often applied to simultaneously improve idle vibration and ride-shake. However, the electronic control mount must apply a controller, solenoid valve, wiring, etc. Cost, weight, layout, etc. are disadvantageous when compared to a general hydro mount. Therefore, it cannot be applied to many models. Therefore, in this paper, a self-switchable mount was developed and proposed. Self-switchable mounts have eliminated controllers, solenoid valves and wiring. The method of changing the stiffness is the amplitude of the vibration input to the mount. In this paper, design principles, cost, and weight savings will be mentioned, and the test results in vehicles will be presented.
김승원(SeungWon Kim),허성태(SeongTae Heo),오태원(TaeWon Oh),이병곤(ByeongGon Lee) 한국자동차공학회 2020 한국자동차공학회 부문종합 학술대회 Vol.2020 No.7
The main role of the engine mountings is to hold the P/Train in the vehicle and insulate the vibration. Therefore, the main material of the engine mount consists of rubber with excellent vibration insulation. However, the behaviour of the P/train needs to be controlled in accordance with the demand for high speed driving and continuous vibration performance improvement, so the fluid system was applied. A fluid system consisting of orifice tubes will have damping performance at specific frequencies, controlling the behaviour of P/Train. However, the application of fluid mounts has the disadvantage of having high frequency dynamic characteristics disadvantage due to fluid, a non-compressive material inside rubber. As the high frequency dynamic characteristics increase, the mass damper lamp of more than 1 kg is continuously applied at each stage of development of the vehicle due to the deterioration of the combustion sound and acceleration transmission sound of the diesel engine. Mass dampers play a role of improving vibration sensitivity, but are very unfavorable structures in terms of cost and weight. Thus, in this paper, the reverse-phase mount structure, which can improve high frequency dynamic properties while maintaining fluid mounts, has been applied. It was also proposed to remove volume-stiffness (resistance to fluid non-compression) by physically separating the rubber and fluid systems.