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 : 김동휘 (검색결과 871 건)
- 무료
- 기관 내 무료
- 유료
-
패킷 손실 환경에서 정확도 감소를 줄이는 심층 신경망 재학습 방법
김동휘,임유진,한승하,김정래 한국정보과학회 2023 정보과학회논문지 Vol.50 No.3
모바일 기기가 부족한 연산 용량으로 복잡해지는 심층신경망 모델들을 처리하기 위해 클라우드 서버와 협력해 처리하는 협력 지능이 도입되었다. 협력지능은 많은 양의 특징 데이터들을 서버로 전송하는데 시간을 많이 소모한다. 사용자 데이터그램 프로토콜(UDP)을 사용하면 이를 개선할 수 있지만 전송 과정에서 패킷 손실이 발생하면 추론의 정확도가 떨어진다. 본 논문은 패킷 손실로 인한 연속된 특징 손실을 모델링하여 서버에서 실행되는 층들만을 재학습하는 방법으로 정확도 저하를 줄이고, 통신 환경 변화에 강건하며 모바일 기기의 저장 공간 부담을 줄이는 재학습 방법을 제안한다.
-
120밀리 자주박격포 사격 충격에 따른 마운트 구조 안정성 분석
김동휘 한국기계기술학회 2018 한국기계기술학회지 Vol.20 No.6
In this paper, dynamic model of 120mm self-propelled mortar is developed, and multi flexible body dynamics analysis is performed to analyze stresses occurring in the mount during mortar fire. For this, vehicle dynamic system, mortar dynamic system, and finite element mount model are proposed. The commercial program Recurdyn is used in the analysis. As a result of the analysis, the maximum stress(146.9MPa) occurred at the mount side plate. In order to analyze the validity of the analysis results, we performed strain measurement tests by selecting three major points, and the errors of results were 7.91%, 11.15%, and 18.23%, respectively. It is confirmed that the tendency of analysis and test is similar.
-
3차원 수리지질모델링에 의한 갱내채광 광산의 출수량 예측
김동휘,김경만,김대훈,정승주,백환조 한국자원공학회 2018 한국자원공학회지 Vol.55 No.5
갱내채광 광산의 3차원 수리지질모델을 구축하기 위하여 균열암반의 공학적 특성과 출수현황을 조사하였 다. 문헌자료와 불연속면 조사를 수행하여 암반의 수리지질학적 특성을 파악하고, 해당 지역의 강우조건 및 지하수위 자료를 활용하여 초기 예측모델을 설정하였다. 예측모델은 광산 지역의 지하수위 및 경계조건 설정에 적용하였고, 예 측된 출수량을 실제 출수량과 장기간 비교하여 최종적인 3차원 수리지질모델을 구축하였다. 또한, 구축된 3차원 수리 지질모델로부터 향후 갱도 굴진에 따른 갱내 출수량의 변화를 추정하였다. 이로부터 예측된 갱내 출수량은 배수 시스 템 설계에 활용 가능할 것으로 판단된다. Properties of fractured rock mass and groundwater inflow were investigated to construct a three-dimensional hydrogeologic model for an underground limestone mine. Hydrogeologic properties of rock mass were estimated from the literature review and field observation of rock discontinuities. An initial groundwater model was constructed from the records of the rainfall and groundwater level of the study area. This initial model was adopted to determine the groundwater level and hydrogeologic boundary conditions. The groundwater inflow into the mine drifts was periodically recorded for months, and was compared with the estimated values by the model. Also, the possible changes in the groundwater inflow induced by the further excavation were estimated using the constructed model. The results showed that the groundwater inflow data estimated by the three-dimensional hydrogeologic model helps the design and optimization of a mine pumping system.
-
다중 문턱전압 CMOS를 이용한 저 전력 캐리 예측 가산기 설계
김동휘,김정범 강원대학교 정보통신연구소 2007 정보통신논문지 Vol.11 No.-
This paper proposes a low-power carry look-ahead adder using multi-threshold voltage CMOS. The designed adder is compared with conventional CMOS adder. The propagation delay time is reduced by using low-threshold voltage transistor in the critical path. Also, the power consumption is reduced by using high-threshold voltage transistor in the shortest path. Comparing with the conventional CMOS circuit, the proposed circuit is achieved to reduce the power consumption by 14.71% and the power-delay-product by 16.11%. This circuit is designed with Samsung 0.35㎛ CMOS process. The validity and effectiveness are verified through the HSPICE simulation.
-
김동휘,강경훈 大邱大學校 科學技術硏究所 1998 科學技術硏究 Vol.5 No.3
In this paper, we propose the architecture of wireless ATM network for integrated wired/wireless services. In order to support those services, future mobile network will be based on the ATM infrastructure. We first consider several design issues such as some requirements for air interface, overall network conceptual model, and interworking schemes with Wireless ATM(WATM) network. Second, we describe an architecture of public WATM network and IP handling schemes. We also describe the procedures that could be applied to internet access providing common services regardless of accessing places. These architectures will provide WATM users with seamless communications with same IP address in public network as well as in private LAN.
-
시험관내에서의 각종 금속투여에 의한 생쥐의 가조직내 δ-Aminolevulinate Dehydratase 활성치의 변동
김동휘,정규철 중앙대학교 의과대학 의과학연구소 1981 中央醫大誌 Vol.6 No.1
In summarizing the results obtained from the experiment on ??-ALAD activity by adding 6 kinds of heavy metals and EDTA, a chelating agent, at different concentrations ranging from 1.5×10^-7 M to 1×10^-2 M in vitro to hepatic ??-ALAD partially purified from ICR strain of mice, the following conclusions can be drawn. Zn^++, a constitutive element of the enzyme, behaves as an activator at low concentration below 6×10^-5 M, and as an inhibitor at higher concentration above 1.5×10^4 M. The same effect is noted with Al^+++ and Hg^++, although inhibitory action of these two metals appears at higher concentration than Zn^++. Both Pb^++ and Cu^++ are the potent inhibitor of the enzyme, and the Cu^++' acts as more potent inhibitor than Pb^++, EDTA, a chelating agent, also acts as a powerful inhibitor of the enzyme. It can be concluded from the above results that the ??-ALAD activity is found to be an indicator of the total metal ion concentration in the blood, and therefore, is considered to be of doubtful value as a biological index of lead exposure for screening large population of lead workers.
-
-
-
김동휘 대구대학교 산업기술연구소 2004 産業技術硏究 Vol.16 No.1
Recently as the population of Internet user increases rapidly, Internet traffic also goes on rapid growing. To accommodate the traffic, Optical Internet network emerged as the proper solution. As Optical Internet Network uses WDM links, the routing and signaling protocols used in Internet must be modified to fit the properties of WDM links and to support traffic engineering function. This paper suggests the network architecture that can support autoconfiguration of Optical Internet Network Node in Centralized Control Structure.
-
김동휘,조기성 대구대학교 과학기술연구소 1998 科學技術硏究 Vol.5 No.4
In this paper, we consider the architecture of integrated wired/wireless network architecture deployment on the basis of intelligent network. The most important facts in evolving to integrated wired/wireless network are to introduce B-ISDN as a core network, and to integrate service functions and control functions into an advanced intelligent network. We first consider the structure of broadband integrated wired/wireless network. The functional structure for wireless ATM and the evolution trends of wired/wireless system are discussed. Second, the evolution strategy of broadband integrated wired/wireless network and its structure are presented. Finally, the required technologies for broadband integrated wired/wireless services are classified and discussed.
KCI연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
