http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
On-Line UPS 기능 내장형 ESS 설계 및 적용
권용효(Yong-Hyo Kwon),김말수(Mal-Soo Kim),오기형(Gi-Hyeong OH),장성국(Sung-Kuk Jang),최종철(Jong-Chul Choi),박기원(Ki-Won Park) 대한전자공학회 2016 대한전자공학회 학술대회 Vol.2016 No.6
본 논문에서는 ESS(Energy Storage System)의 Battery측 DC 전압을 공유하여 기본적인 ESS구성에 On-Line UPS기능을 함께 가지는 Multi-Function ESS를 설계하고, 적용한 기술을 설명 한다. 용량은 PCS 250kW, Battery 190kWh, UPS 125kW용량으로 구성하였으며, UPS는 125kWh 2Set를 이중화하는 구성으로 설계 하였다. On-Line UPS 기능 내장형 ESS 전체 제어는 PMS를 통해 이루어지며, 기본적으로 계통연계(GC), 독립운전(GI), GC와 GI가 센싱을 통해 자동으로 절체되는 Auto Mode 제어 모드를 가지며, TOU Application 운영이 가능하도록 제어기를 구현하였다. 또한 PMS는 Battery SoC를 모니터링하여, 사용자가 ESS와 UPS운영을 필요에 따라 용량을 정의하고 운영할 수 있도록 하였다. 관련기술을 기본/상세 설계 후 제작하여, 기능 및 성능에 대한 시험 검증 후 실제 부하와 연계하여 실증한 사례를 기술 한다.
Jang, Won-Woo,Kwak, Boo-Dong,Ha, Joo-Young,Kang, Bong-Soon,Lee, Gi-Dong The Korea Institute of Information and Commucation 2009 Journal of information and communication convergen Vol.7 No.3
In this paper, we propose the improvement method of the camera images regardless of exposure environments. By using a double-exposure method, we could improve camera images with clear recognition. We applied the improvement method on the mobile phone. For the feasibility of the proposed algorithm, we compared simulated camera images with the proposed method to conventional images by using auto-exposure image. Experimental results are also shown in this paper.
Jang, Jong-Ok,Lee, Jung-Bok,Kim, Beam-Soo,Kang, Sun-Chul,Hwang, Cher-Won,Shin, Kee-Sun,Kwon, Gi-Seok The Korean Society of Environmental Agriculture 2011 한국환경농학회지 Vol.30 No.3
BACKGROUND: Chemical fungicides not only may pollute the ecosystem but also can be environmentally hazardous, as the chemicals accumulate in soil. Biological control is a frequently-used environment-friendly alternative to chemical pesticides in phytopathogen management. However, the use of microbial products as fungicides has limitations. This study isolated and characterized a three-antifungal-enzyme (chitinase, cellulase, and ${\beta}$-1,3-glucanase)-producing bacterium, and examined the conditions required to optimize the production of the antifungal enzymes. METHOD AND RESULTS: The antifungal enzymes chitinase, cellulase, and ${\beta}$-1,3-glucanase were produced by bacteria isolated from an sawmill in Korea. Based on the 16S ribosomal DNA sequence analysis, the bacterial strain AM50 was identical to Streptomyces sp. And their antifungal activity was optimized when Streptomyces sp. AM50 was grown aerobically in a medium composed of 0.4% chitin, 0.4% starch, 0.2% ammonium sulfate, 0.11% $Na_2HPO_4$, 0.07% $KH_2PO_4$, 0.0001% $MgSO_4$, and 0.0001% $MnSO_4$ at $30^{\circ}C$. A culture broth of Streptomyces sp. AM50 showed antifungal activity towards the hyphae of plant pathogenic fungi, including hyphae swelling and lysis in P. capsici, factors that may contribute to its suppression of plant pathogenic fungi. CONCLUSION(S): This study demonstrated the multiantifungal enzyme production by Streptomyces sp. AM50 for the biological control of major plant pathogens. Further studies will investigate the synergistic effect, to the growth regulations by biogenic amines and antifungal enzyme gene promoter.
Edge Adaptive Color Interpolation for Ultra-Small HD-Grade CMOS Video Sensor in Camera Phones
Jang, Won-Woo,Kim, Joo-Hyun,Yang, Hoon-Gee,Lee, Gi-Dong,Kang, Bong-Soon The Korea Institute of Information and Commucation 2010 Journal of information and communication convergen Vol.8 No.1
This paper proposes an edge adaptive color interpolation for an ultra-small HD-grade complementary metal-oxide semiconductor (CMOS) video sensor in camera phones that can process 720-p/30-fps videos. Recently, proposed methods with great image quality perceptually reconstruct the green component and then estimate the red/blue component using the reconstructed green and neighbor red and blue pixels. However, these methods require the bulky memory line buffers in order to temporally store the reconstructed green components. The edge adaptive color interpolation method uses seven or nine patterns to calculate the six edge directions. At the same time, the threshold values are adaptively adjusted by the sum of the color values of the selected pixels. This method selects the suitable one among the patterns using two flowcharts proposed in this paper, and then interpolates the missing color values. For verification, we calculated the peak-signal-to-noise-ratio (PSNR) in the test images, which were processed by the proposed algorithm, and compared the calculated PSNR of the existing methods. The proposed color interpolation is also fabricated with the 0.18-${\mu}m$ CMOS flash memory process.
Plant Regeneration from Embryogenic Suspension Cultures of Soybean (Glycine max L. Merrill)
Jang, Gi-Won,Park, Ro-Dong,Kim, Kwang-Soo The Korean Society of Plant Biotechnology 2001 Plant molecular biology and biotechnology research Vol.3 No.2
In order to establish efficient plant regeneration from embryogenic suspension cultures of soybean, Glycine max L, we examined the effects of auxin type and concentration, cytokinin type and concentration, and amino acid type and concentration on the growth of embryogenic clumps from induced callus, and the effect of desiccation of mature somatic embryos obtained from these clumps on the frequency of somatic embryo germination. Embryogenic callus was induced from the edge of the cotyledons cultured on MS medium containing 6% sucrose, 40 mg/L 2,4-D, 0.2% gelrite and pH 5.7. The growth of embryogenic clumps was best in early staged, embryogenic callus that was placed in suspension culture of MS medium containing 5 mg/L 2,4-D and 0.5 mg/L asparagine. Single somatic embryos were isolated from the clumps and plated on the same medium for maturation. When the mature single somatic embryos were desiccated for 96 h, somatic embryo germination came up to approximately 90%. The plantlets germinated after embryos desiccation for 2 weeks were transfered to MS medium containing 3% sucrose,0.2% gelrite and pH 5.7.
Jang, Yun-Jin,Kim, Kyoung Won,Jeong, Woo Kyoung,Shin, Yong Moon,Song, Gi-Won,Hwang, Shin,Lee, Sung-Gyu American Roentgen Ray Society, etc.] 2010 American Journal of Roentgenology Vol.194 No.2
<P>OBJECTIVE: The purpose of this study was to determine the range of portal blood flow velocity at Doppler sonography of recipients without major complications after right-lobe living donor liver transplantation and to explore factors affecting portal blood flow velocity. MATERIALS AND METHODS: Seventy-one patients (59 men, 12 women; mean age, 48.1 +/- 8.8 [SD] years; range 19-69 years) who underwent right-lobe living donor liver transplantation were enrolled. At preoperative Doppler sonography, peak portal blood flow velocity was measured at the main portal vein. On CT scans, varix score was calculated by subcategorization and grading of varices, and splenic volume was measured. The recipient's body weight and the graft weight were measured, and the graft-to-body weight ratio was calculated. Postoperatively, peak portal blood flow velocity of the recipient portal vein was measured at Doppler sonography on the first three postoperative days. The correlations between preoperative peak portal blood flow velocity, varix score, splenic volume, recipient body weight, graft weight, graft-to-body weight ratio, and recipient portal blood flow velocity were evaluated with Pearson's and Spearman's tests. Multiple regression analysis was performed to determine the factors independently correlated with recipient portal blood flow velocity. RESULTS: The mean peak recipient portal blood flow velocity was 47 +/- 14 cm/s (range, 23-86 cm/s). Portal blood flow velocity increased significantly as varix score increased (r = 0.463, p < 0.001). Weak positive correlations were found between portal blood flow velocity and graft weight (r = 0.255, p = 0.032) and graft-to-body weight ratio (r = 0.242, p = 0.042). Multiple regression analysis showed varix score and graft-to-body weight ratio independently correlated with portal blood flow velocity (beta = 2.496, p < 0.001; beta = 19.791, p = 0.014). CONCLUSION: Depending on the severity of preoperative portal hypertension and graft size, recipient portal blood flow velocity has a wide range in the days immediately after right-lobe living donor liver transplantation.</P>