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최근 몇 년 동안 사람들의 고유한 생리적인 특징을 이용한 생체 인식은 새로운 학문으로서 연구 및 개발이 활발하게 진행되고 있다. Hand-Geometry는 생체 인식의 확인 그러고 취득의 편리 때문에 식별 그리고 확인을 위하여 사용되고 있다. 그러므로, 본 논문은 이러한 특징을 가지는 손의 기하학적인 Hand-Geometry 인식 시스템을 제안하고자 한다. 해부학적인 관점에서, 인간의 손은 길이, 폭, 두께, 기하학적인 모양, 손바닥의 모양, 그러고 손가락들의 기하학적인 모양까지 특성으로 나타내어 질 수 있다. 그러나 특징 데이터 가운데 사용자의 Hand-Geometry의 특징에 따라 길이 데이터가 변하는 것을 실험적으로 발견하였다. 따라서 이와 같은 가변적인 길이 데이터를 안정화시키기 위하여 본 논문에서는 길이 데이터의 기준점을 손톱 아래 점으로 정하고, GA를 적용하여 보다 안정된 특징점을 추출하였다. 본 논문에서 제안한 Hand-Geometry 인식 시스템은 성인 20명의 개인에 대해 100개의 측정 데이터에 기인한 확인 결과를 제시한다. 인식 과정은 320×240의 이미지로 실험하였고 인식 과정의 결과는 95%의 적중률과 0.020의 FAR로 나타났다.
This study examined the appropriateness of land use plan and district unit plan with housing sites developed in Gwangju metropolitan city and as a result of examining area ratio, design structure, building location and use, the following results were obtained. According to the increase of population and housing site development accommodation for last 20 years, the population of housing site development was greatly increased compared to population increase and this phenomenon caused movement of population in inner city rather than inflow of population from the outside of city as well as physical environment deterioration and inner city decline. Housing site development project of Gwangju metropolitan city showed location type developed by surrounding downtown with semi-encircled except neighborhood of Mt. Mudeung and K type combining flathead type developed along the Yeongsan river. It is the result of developing natural green belt which is easy to develop large-scale housing sit and future housing site development needs to consider urban space structure. While the ratio of residential site was reduced with the land use plan of housing site development district for 20 years, public facility site tends to increase and in particular park and green belt area increased, but the ratio of road was relatively reduced. In addition, the detached house site was reduced but the ratio of commercial site was within 5% and showed no great change. Such an increase of park and green belt was related to people`s orientation and change of social trend, but the location of this site showed no qualitative growth as the increase of area.
Radiant burners are applicable to drying, preheating and curing in materials manufacturing processes. Radiation efficiency is one of the important performance criteria for these burners. The wide variation in reported radiation efficiencies are partly due to the differences in the measurement techniques. In the present work, water cooled radiant heat flux meter was used to measure radiant heat flux from a metal fiber mat burner. Non-contact type thermometer was also utilized to measure the surface temperature of the burner. Combustion gas was measured by gas analyzers. According to the thermal loads and stoichiometric ratios, radiant heat transfer ratio and combustion performance were discussed here in.
Radiant burners are applicable to drying, preheating and curing in materials manufacturing processes. High radiation efficiency is one of the most important performance criteria for these burners. The wide variation in reported radiation efficiencies are partly due to the differences in the measurement techniques. In the present work, water cooled radiant heat flux meter was used to measure radiant heat flux from a metal fiber mat burner. Non-contact type thermometer was also utilized to measure the surface temperature of the burner. Combustion gas was measured by gas analyzers. According to the thermal loads and stoichiometric ratios, radiant heat transfer ratio and combustion performance were discussed here in.
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To identify the cause of the error and maintain the health of system, an administrator usually analyzes event log data since it contains useful information to infer the cause of the error. However, because today's systems are huge and complex, it is almost impossible for administrators to manually analyze event log files to identify the cause of an error. In particular, as OpenStack, which is being widely used as cloud management system, operates with various service modules being linked to multiple servers, it is hard to access each node and analyze event log messages for each service module in the case of an error. For this, in this paper, we propose a novel message-based log analysis method that enables the administrator to find the cause of an error quickly. Specifically, the proposed method 1) consolidates event log data generated from system level and application service level, 2) clusters the consolidated data based on messages, and 3) analyzes interrelations among message groups in order to promptly identify the cause of a system error. This study has great significance in the following three aspects. First, the root cause of the error can be identified by collecting event logs of both system level and application service level and analyzing interrelations among the logs. Second, administrators do not need to classify messages for training since unsupervised learning of event log messages is applied. Third, using Dynamic Time Warping, an algorithm for measuring similarity of dynamic patterns over time increases accuracy of analysis on patterns generated from distributed system in which time synchronization is not exactly consistent.
The objective of this study is to develop a condition assessment model based on artificial neural network that can be used to analyze the mechanical flexural design behavior of slab bridge with damages and the flexural design program behavior of damaged slab bridge. A modified rating factors that can be applied to flexural design method algorithm is used to reflect the external condition assessment, the required strengthening moment computed from the rating factors is considered as additional moment term acting on slab and represent the effect of external condition. The accuracy of the proposed algorithm is verified by comparing the analysis results with the field measurement data from other studies and the analysis results based on ultimate strength theory. The debeloped damage model is applied to the analysis of slab bridge with damage under nonlinear elastic condition. The comparisons confirmed that the quantitative analysis of required strengthening thickness of the fiber-reinforced epoxy panel(FREP) due to optimum neutral position.
Experiments were performed to investigate the combustion characteristics of low NOx burner for 1ton/hr industrial boiler, through the inflame measurement and flue gas analysis. Main combustion characteristics are shape of flame, NOx and CO concentrations, and radical distributions. Variable nozzles were used for liquid fuel injection to find out the combustion characteristics as the fuel atomization, and CCD camera was used to capture the radical distributions of flame. Through the experiments, we can obtain such goals as the low NOx of below 150ppm, CO of near zero corrected at O2 4%.