http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 이전제 (검색결과 160 건)
- 무료
- 기관 내 무료
- 유료
-
이전제,김광모 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1
The main purpose of this study is the development of potable CT systems which can be used to evaluate the structural safety of member in ancient wood buildings. Many researches about non-destructive evaluation(NDE) of wood have been performed. But most of these researches were focused on inspection of wood whether it had some deteriorated parts or not. In this study, CT systems were developed for quantitative detection of wood deterioration. And, the developed systems were composed of portable devices to apply for ancient wood buildings in field. Ultrasonic wave and X -ray CT methods were considered. And 5 circular shape specimens were tested for verification of developed methods. Over 23mm defects could be detected by ultrasonic CT method, but the size, shape and position did not agree with prototype. When same specimens were tested by X-ray CT method, the position and size of defects could be detected exactly.
-
목재의 섬유방향에 경사진 균열의 혼합모 - 드파괴에 관한 연구
이전제 한국목재공학회 1989 목재공학 Vol.17 No.4
목재의 섬유방향에 경사진 균열의 모-드 Ⅰ과 모-드 Ⅱ의 혼합모-드파괴시의 파괴거동을 조사하기 위하여 라왕(Shorea spp.)의 LA시스템에 있어서 서로 다른 경사각도를 가진 SEN시험편(Single edge notch specimen)에 대하여 휨 시험을 행하였다. 얻어진 결과는 혼합모-드파괴시, 모-드 Ⅰ 응력확대계수 K_I과 모-드 Ⅱ 응력확대계수 K_II 간에 일정한 상호작용이 존재한다는 것을 나타내었다. 또한, 모-드 Ⅰ과 모-드 Ⅱ의 임계응력확대계수(Critical stress intensity factor) K_10 와 K_110를 이용하여 혼합모-드파괴시의 K_I과 K_II 간의 상호관계를 규정할 수 있었으며, 이미 보고된 여러 실험식과 본 실험결과를 비교하여 가장 적합한 관계로서 아래와 같은 관계를 얻을 수 있었다.
-
이전제 서울대학교 농업개발연구소 2000 농업생명과학연구 Vol.4 No.-
Attempts were made to analyze the behavior of single and multiple-bolted connections through theoretical methods such as European yield theory, empirical approaching method, and semi-rigid theory instead of many experimental methods that have been actually inefficient and non-economical. In the case of a single-bolted connection, if accurate characteristic values of a material could be guaranteed, it would be more convenient and economical to perform the behavior analysis using a model based on the semi-rigid theory, instead of the existing complex yield model, or the empirical formula which produces errors, giving different results from the actual ones. If the variables of equation determining the load and deformation could be appropriately controlled, the analytical method in conjunction with a semi-rigid theory could be effectively applied to obtain the desirably predicted value, considering that the appropriate solution could be derived through a simpler equation using a less difficult method compared to the existing yield model. It is concluded that analytical method with semi-rigid theory can be used in the behavior analysis of bolted connection because our developed method showed excellent analysis ability of behavior until number of bolt is two. Although our analytical method has the disadvantage that the number of bolt is limited to two, it is concluded that it has the advantage than numerical method which complicated and time-consuming.
-
-
이전제 서울대학교 농업생명과학대학 농업개발연구소 1998 농업생명과학연구 Vol.2 No.-
In estimation of performance for a light-frame shear wall, the small-scale model test was researched and adopted. The materials of a small-scale model were determined by three experimental methods : Nail push-through test, Nail lateral resistance test and static bending test for studs. Then light-frame shear walls of the small-scale model and the full-scale model(prototype) were manufactured and tested. The results show that the small-scale model test method can be applied to timber structures and may be used as a good predictor of the estimation of the prototype.
-
텍스트마이닝을 통한 중국 시장 스마트폰 소비자 선호 분석 – Samsung 스마트폰을 중심으로 -
이전제 한국전략마케팅학회 2023 마케팅논집 Vol.31 No.1
Given the considerable smartphone market in China, global smartphone companies are competing to acquire Chinese smartphone customers in the market. According to market research in 2021, the market share of Samsung smartphones in the Chinese market recorded less than 4%, which once peaked of 20%. This paper aims to examine why Samsung smartphones are struggling in the Chinese market. This paper uses text mining techniques and explores how Samsung smartphones are evaluated in comparison to other smartphone brands in the Chinese markets. Specifically, this paper collects 31,913 smartphone customers’ reviews of Samsung, Vivo, Oppo, Apple, Xiaomi, and Realme on the Chinese representative online shopping platform Jingdong from February 1st to May 1st, 2022. And analyzes by using sentiment analysis and the LDA Topic model. The text mining results reveal that Chinese consumers evaluate Samsung smartphones as high-end with great quality and performance. However, the findings show that most Chinese young smartphone consumers select their smartphone mainly based on value for money, low price, huge battery capacity, and battery charging speed, which are weak points of Samsung smartphones. These research results provide concrete enlightenment for what kind of marketing strategy Samsung should formulate and implement in the future to increase its market share in China. 글로벌 스마트폰 기업들은 중국의 막대한 스마트폰 시장 규모를 고려하여 중국 시장 내 고객들을 얻기 위해 경쟁한다. 2021년의 한 시장조사에 따르면, 과거 20%에 달했던 Samsung의 시장 점유율은 어렵게 4%에 그쳤다. 이 연구의 목적은 중국 시장 내 Samsung 스마트폰의 시장 점유율이 부진한 원인을 탐색하는 데 있다. 텍스트 마이닝을 통해 중국의 대표적인 온라인 쇼핑 플랫폼에서 2022년 2월 1 일부터 5월 1일까지 총 31,913건의 Samsung, Vivo, Oppo, Apple, Xiaomi, 그리고 Realme 스마트폰 고객리뷰를 수집하였다. 감정분석과 LDA 토픽 모델을 통한 분석 결과, Samsung 스마트폰은 중국 시장에서하이엔드 제품으로 평가되었다. 한편, 중국 시장 내 젊은 고객들이 스마트폰을 선택할 때 고려하는 주요 요인들은 가성비, 저렴한 가격, 배터리 용량과 충전 속도로 나타났는데, 이 요인들은 그들에게Samsung의 약점으로 인식되었다. 이 연구 결과는 향후 중국 시장 내 Samsung의 마케팅 전략 수립과실행에 분명한 시사점을 제공한다.
-
-
-
국산재의 파괴인성에 관한 연구 (Ⅰ) : 모 - 드 (Ⅰ) 파괴시의 파괴인성 Mode I Fracture Thoughness
이전제 한국목재공학회 1989 목재공학 Vol.17 No.4
The fracture toughness of two species, Pinus rigida MILL and Pinus koraiensis S. et Z. grown in Korea, was investigated by means of single edge notch beam specimen for the six principal systems of crack propagation in wood. The values of the fracture toughness for the LR and the LT systems (KTCLR and KICLT) were found to be similar to each other and about 8 times greater than those for the other systems (KICRL, KICTL and KICTR) in both species. The results indicate that the characteristics of fracture toughness in three principal directions of wood (L, R, T direction) are quite different from those of bending strength for the responsible direction. To predict KIC value based on the variation of specific gravity, the experimental values of KICLT and KICTL were compared to the predicted values by published relationship between KIC and specific gravity. However, there were 10 to 25% differences between the former and the latter.
-
ScienceON연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
