신경망 모형을 이용한 신호교차로 안전도 분석을 위한 연구

오주택 韓國交通大學校 2013 한국교통대학교 논문집 Vol.48 No.-

교통의 주요 상충지점인 교차로의 교통사고는 도로구간의 감소추세와 다르게 증가추세를 보이고 있다. 따라서 교차로 교통사고 감소를 위하여 교차로 안전도 분석을 통해 사고의 원인을 파악하고 교통사고를 예측을 통해서 원인과 예방차원에서의 해결방안에 기여하고자 한다. 따라서 본 연구에서는 기존의 교통사고 예측모형에서 주로 사용하는 비선형 회귀방법이 아닌 신경망 모형을 통해 모형을 개발하였다. 수집된 여러 설명변수들 간의 공선성 문제를 분석하였고, 신경망에 많은 설정, 개발 방법 중 어떠한 방법으로 교통사고예측 모형을 개발하는 것이 바람직한지 파악하기 위하여 상관분석을 통하여 총 33개의 변수 중에서 주도로 차로수, 부도로 차로수, 부도로 우회전 차로수, 주도로 횡단보도 유무, 주도로 제한속도, 부도로 제한속도, 부도로 교통섬 유무, 부도로 교통량, 8개의 변수가 사고에 영향을 미치는데 유의미하게 분석되었다. 본 연구에서는 활성화 함수는 가장 많이 사용되는 쌍곡탄젠트와 시그모이드 함수를 사용하였다. 연구 결과, 은닉층이 2개이며 1층은 9개의 노드, 2층은 12개의 노드, 활성화함수는 입력층에는 시그모이드 함수, 출력층에는 쌍곡탄젠트를 사용한 신경망 모형이 가장 높은 설명력(87.7%)을 가진 것으로 분석되었다.

압력변화에 따른 고체절연물의 절연특성 및 적층효과에 대한 분석

강형구 韓國交通大學校 2013 한국교통대학교 논문집 Vol.48 No.-

Several types of solid materials are used in the development of high voltage superconducting apparatuses as the former and insulation barrier1. The solid insulation materials used in cryogenic applications require excellent dielectric characteristics as well as robust mechanical characteristics. In this study, the dielectric experiments for three types of solid insulation materials, including glass fiber reinforced plastic (GFRP), Stycast 2850FTJ, and Bakelite in liquid nitrogen (LN2) are performed. Each experiment on the solid insulation materials is performed according to the type of applied voltage (lightning impulse and AC voltage) and the system pressure (0.1~0.4MPa). Also, experiments considering the stacking effect of insulation sheets are performed. All electrical breakdown voltages are observed when the solid insulation materials are fully penetrated. Electrical breakdown experiments on GFRP and Bakelite sheets according to the number of stacking are performed and the results are compared.

프랙탈형 마이크로스트립 밴드패스필터 설계

류연국 韓國交通大學校 2013 한국교통대학교 논문집 Vol.48 No.-

A fractal microstrip resonator type bandpass filter is designed and simulated with miniaturized size for wireless applications. The typical fractal design is based on the Koch prefractal geometry applied to the dual-mode microstrip ring type resonator. The square type modified ring has symmetrical and iteration scheme. Also self-similarity of the structure about it's iteration level enables it to produce the degenerate mode that is coupled using the proper perturbation technique. In this paper, a fractal microstrip resonator type bandpass filter has been introduced as a miniaturized dual-mode bandpass filter and presented the simulation results for the designed filter.

朝鮮時代 上流住宅의 構成樣式과 體系에 關한 硏究 (忠南, 大田 地域을 中心으로)

박석현 韓國交通大學校 2013 한국교통대학교 논문집 Vol.48 No.-

The results are as follows : 1.Arrangement Element The arrangement element was decided how a main building, the attached building, and yard are located. Spaces for a servants' quarter, a separate house and a shrine were appendixed in a main building. The arrangement style of a building was affected by local faith, social economic, cultural and geographical conditions. The order of arrangement constitution was decided by the function and use of a building, distinction by the sexes, and status system. A class of a building was decided by confucian ideas and status. The order of arrangement constitution consists of a shrine house, a separate house, a main house, a detached house, a servants' quater. 2.Plane Elements Everything such as the scale, the floor, and the style of a house was decided by the use, the function and the grade of a house. The resident order was decided by the relation of young or old. The main house and the detached house was not separated after the middle of Choseon dynasty by a house. Which was a high definition plane constitution. Houses were separated for men houses and woman houses, because it was affected by Confucian ideas after the middle of Choseon dynasty.

충주지역의 비지정 전통주거건축에 대한 조사 연구

손태진 韓國交通大學校 2013 한국교통대학교 논문집 Vol.48 No.-

Chungju area has a few designated architectural Heritage, even though there is a birthplace of culture centered on Namhan River area and has a long history ranging from the three Han states age to the present time, Cultural properties should be excavated through research work in the undesigned construction in Chungju area and have management and preservation in system. Local community should place the institutional system to preserve local culture as soon as possible. Moreover, this study should be keep going in Chungju area and discover new researchers and interact each other to preserve cultural characteristics. In real, however, we do not know who judge architectural value of the undesigned properties or which government is charging for and discussing with, Chung area ought to come systeme to keep local culture. Discovery of local cultures need continuing interests which is an essential element to increase local competitiveness with regional characteristics as traditional culture and to link up in tourism industry.

저가 고효율 결정질 실리콘 태양전지 제작을 위한 전극 형성 기술 개발

양계준,임동건,조해성,김준희,박주억 韓國交通大學校 2013 한국교통대학교 논문집 Vol.48 No.-

The screen printed technique is one of the electrode forming technologies for crystalline silicon solar cell. It has the advantage that can raise the production efficiency due to simple and low cost process. The electrode technology is the core process because the electrode feature is given the biggest influence. In this paper, we tried to change conditions such as squeegee angle, snap off, printing pressure and mesh spacing. As a result, the screen printing process showed better conversion efficiency with higher finger height. We achieved the energy conversion efficiencies of 17.3 % mono-crystalline silicon solar cell with optimal screen printing conditions.

Applying Multiple Fuzzy Majority of Alternatives for Aggregating Incomplete Preference Judgments in

최덕현 韓國交通大學校 2013 한국교통대학교 논문집 Vol.48 No.-

With the goal to makes the best decision they can, based on all the information they have, as quickly as possible, with the right level of participation and commitment, many organizations employ groups in decision-making. In this study, the extended group decision-making method of the procedure presented by Choi et al.’s1 is presented. Contrary to prior work, the different dominating degrees are calculated for each alternative based on the different fuzzy majority concepts of each decision-maker, considered individually.

혼돈 키스트림 발생기의 회로설계

박광현 韓國交通大學校 2013 한국교통대학교 논문집 Vol.48 No.-

In order to design of the chaotic key-stream generator possessing the chaotic dynamics and more long period(or cycle), a linear-feedback shift register(LFSR) is connected to the circuit of chaotic composition map in this work. As a result, the digital circuits and discretized truth table for the chaotic key-stream generator is presented also.

《戱劇脚色名詞考》譯註-總論·論生行

윤현숙 韓國交通大學校 2013 한국교통대학교 논문집 Vol.48 No.-

齊如山是20世紀中國著名的戱曲理論家.早年留學歐洲,曾涉獵過外國戱劇,歸國後畢生從事中國戱曲硏究.1931年與梅蘭兰芳·餘叔岩等人組成北平國劇學會,并創辦國劇傳習所,以先導戱曲教育..1928年出版的《戱劇脚色名詞考》,是對脚色名詞作詳細的解釋,讓我們可以知道脚色的演變過程...這本書應該說是有着重要的歷史貢獻,..但目前爲止, 在韓國國內還沒有引起很大的關注. 因此, 要介紹這本書, 以助於中國戱曲研究有幫助.

지능형 순항제어 시스템을 위한 밀리미터파대역 마이크로스트립 배열 안테나 설계

박동희 韓國交通大學校 2013 한국교통대학교 논문집 Vol.48 No.-

In particular, in the adaptive cruise control system (ACC) being studied as the future of the transportation systems, the inter-vehicle distance sensors for alarm has been used Laser Radar, mm-wave Radar, Ultra-sonic Radar, and CCD camera. The sensors of anti-collision system should be less affected for temperature, humidity, weather conditions, etc. In addition, the smaller size and the exact distance and relative velocity must be measured. Thus, as a sensor of automotive anti-collision system, the mm-wave sensor is suited for ACC. In this paper, we have designed the patch array antennas with the slots capable of working in the E-band as the size of patch capable of operating in Ka-band. The slots inside the patches have the symmetry as the U-shaped slots. The designed array antennas have multi-mode characteristics at central frequency 77GHz millimeter-wave band. Based on this, we are designed and analyzed 4×4 array antenna. As a result, this paper is proposed the possibility of prototyping by design and analysis of microstrip array antennas for automobile anti-collision system.