http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
장병화(Byung Hwa Jang),김대해(Dae Hae Kim),김용모(Yong Mo Kim),권민준(Min Jun Kwon),이창엽(Chang Yeop Lee) 한국에너지기후변화학회 2016 에너지기후변화학회지 Vol.11 No.2
An experimental study has been performed to examine nitrogen oxides (NOx), carbon monoxide (CO) emission characteristics of a burner used for the heating medium boiler. Multi small flames those are heavily weighted fuel lean/rich region were formed on the developed burner. It can reduce emission concentration of pollutant such as NOx because of low flame temperature and equivalence ratio control. In the experimental condition, excess ratio of overall combustion zone was 1.21 for the clear combustion and it was fixed during the experiment. However, each small flames were classified into two types, fuel lean flame (excess air ratio was 0.7) and fuel rich flame (excess air ratio was 1.56). In this study, combustion air (30 ℃, 80 ℃), nozzle type (single nozzle, 45° nozzle, radial nozzle) and nozzle penetration length (-10 ㎜, +16 ㎜, 226 ㎜) were selected as a experimental variables and experiments were focused to investigate the emission characteristics of the developed burner. As a result, NOx emission was decreased to 29 ppm at flue gas O₂ 4% condition when the temperature of combustion air was 30°C and it was 35 ppm when the temperature of combustion air was 80℃.
이정환,장병화 安東大學 1990 安東大學 論文集 Vol.12 No.1
This paper describes a new peak-valley detection algorithm which is suitable to one dimensional threshold selection for the B/W (black/white)image segmentation. The notion of CPVS (critical peak-valley set)is introduced, and several theorems concerning its properties are derived including the conditions for the uniqueness of the MCPVS (maximal critical peak-valley set). The procedure which can extract all the possible critical peaks and valleys is presented and verified. By applying the proposed algorithm to the histograms of real images some desirable results are obtained and experimental results show that the consept of critical peaks and valleys are useful for the selection of threshold values.