http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
무선메쉬 네트워크에서 우회정보를 이용한 다중경로 DSDV 라우팅기법
이도엽,김중규,Lee, Do-Yup,Kim, Jung-Gyu 대한임베디드공학회 2010 대한임베디드공학회논문지 Vol.5 No.3
One of the most famous proactive routing protocols, DSDV (Destination -Sequenced Distance-Vector), is based on the minimum hop count. This paper suggests BIMP(Bypass Information Multi-Path) DSDV routing protocol that this protocol could route reliably as it can take the information of the bypass for the solution of the problem on EHMP DSDV. In this paper, the protocol checks throughput, packet delivery delay, packet delivery ratio, number of management messages, packet transmit finish time, etc on the traffic compared to DSDV, HMP DSDV, and EHMP DSDV protocols.
선박용 LED Chamber Light의 열 및 광학 특성에 관한 연구
김상현,이도엽,김우성,장낙원,Kim, Sang-Hyun,Lee, Do-Yup,Kim, Woo-Sung,Jang, Nakwon 한국전기전자재료학회 2015 전기전자재료학회논문지 Vol.28 No.1
Recently, LED is widely used in the kinds of display devices or lighting. In this paper, we fabricated LED chamber light for naval vessels to replace to conventional chamber light using incandescent lamp. The LED package of chamber light was designed with luminous intensity of 5.5 cd, color temperature of $6,000{\pm}500K$, forward voltage of 3~3.2 V and input current of 60 mA. A LED module was composed of 36 LED packages and metal PCB. The VF and luminous intensity of LED package were getting down when temperature increased. The temperature of LED chamber light was measured by changing the number of LED package and applied current for one hour when an electric current flow. The heat transfer capability have been improved by using metal PCB. The power consumption of LED chamber light reduced by 86% compared to the conventional chamber light using incandescent lamp.
A Study on the Fracture Toughness Evaluation Method of High Strength Steel for containership
Hong-Yeol Bae(배홍열),Do Yup Lee(이도엽),Bo Young Jeong(정보영) 대한용접·접합학회 2021 대한용접학회 특별강연 및 학술발표대회 개요집 Vol.2021 No.5
As the size of the container ship increased, the strength and thickness of steel applied to the UD and HSC part also increased. Thus also it increased probability of unstable fracture. Reflecting this situation, the IACS has made mandatory regulations requiring steel plate with excellent fracture toughness(BCA steel) to be applied. In general, Kca and CAT are widely used as parameters representing the fracture toughness of steel. However, in order to obtain these parameter, a large scale tensile test machine with a capacity of over 1400 tons is generally required. In addition, this is an experiment using the full thickness of the steel, and about 3 to 5 specimens are required per set. Therefore, this large-scale test is very expensive and time consuming. Particularly, most of the international class societies require a guarantee of fracture toughness for each steel plate when production stage. Therefore, it is very difficult to producing BCA steel. To solve this problem, a small-scale test method that can replace the large-scale test has been proposed, and studies have been conducted by many researchers. Of course, there are test methods that have already been developed and are commonly applied, but as the thickness and strength of steels increase, many researchers have raised many problems with the reliability of the existing small-scale test methods. This is because BCA steel was developed through the unique technology of each steel company due to its characteristics. Therefore, it was suggested that it would be reasonable to independently develop a small-scale test method suitable for each company’s development concept rather than a test method that can be applied generally. This study is about a small-scale test method that considers the development concept of the BCA steel independently developed by POSCO.