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A Study on Complex Themkodynamic Equilibrium Calculations of Coal Ash Slag Behavior
Juang,BongJin 수원대학교 산업기술연구소 1997 산업기술연구소논문집 Vol.12 No.-
석탄회분 슬래그의 거동은 슬래그의 조성 및 온도의존성이 높기 때문에 석탄을 이용하는 장치, 즉 슬래깅 가스화기, 싸이클론 연소기, 슬래그 탭 보일러 등의 설계 및 성공적인 조업을 위해서 매우 중요한 변수가 될 뿐만 아니라, 이와같은 장치에 사용되는 탄종의 적합성 여부 및 회분의 슬래깅 성향을 판별하는 중요한 선택의 기준을 제공하여 준다. 이와 관련하여 석탄회분이 용융되면서 생성된 슬래그의 액체조성 및 양의 예측은 석탄회분 성분의 화학반응과 생성된 상들의 물성치를 고려하여 계의 총자유에너지를 최소화시키는 열역학적 평형계산을 근거로 INITMOL과 SOLGASMIX 프로그램에 의해 실행되었다.
A Dynamic Portrait Segmentation by Merging Colors and Depth Information
Li-Hong Juang,Ming-Ni Wu,Feng-Mao Tsou 제어·로봇·시스템학회 2015 International Journal of Control, Automation, and Vol.13 No.5
In this paper, we proposed a new method to improve the dynamic portrait segmentation in Kinect which always causes the problem of incomplete image segmentation of portrait due to the loss of the depth. This problem can be solved by using the color information to reinforce the areas where the depth is uncertain. We can segment the portrait’s foreground more completely using the proposed method. First, the depth information can be divided into foreground, background, uncertain areas to produce a judging area for the foreground’s uncertain areas. Secondly, the volunteer image will be segmented by Sobel edge detection, watershed and other steps in color information then be treated as the characteristic value of color area to calculate the mean value and standard deviation respectively. Finally, we chose the best image from these processing by comparing the color feature of the foreground edge and the judging area. The results show that we can completely segment out the portrait image as well as reduce its error rate significantly.
Jason Yi Juang Yeo,Felycia Edi Soetaredjo,Suryadi Ismadji,Jaka Sunarso 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.97 No.-
Supercritical carbon dioxide (SC-CO2) represents a promising solvent in the synthesis of biodiesel givenits enhanced mass transfer properties as well as its high affinity to the fatty acids. In this work, the phaseequilibria data of 5 major fatty acids: palmitic, stearic, oleic, linoleic, and linolenic acid in SC-CO2 werestudied experimentally at temperature between 343.15 to 373.15 K and pressures between 8 to 24 MPa. The experimental data were correlated using Peng–Robinson Equation of State with van der Waals(PR-vdW), Panagiotopoulos-Reid (PR-PR), and Stryjek-Vera (PR-SV) combining rules. Thefitting result byPR-PR was shown to be more accurate and consistent than those of PR-vdW and PR-SV. From these data,we found that oleic acid has the greatest solubility in SC-CO2, followed by linoleic acid, palmitic acid,stearic acid, and lastly, linolenic acid.
M.-H. Juang,J. Yu,S.-L. Jang 한국물리학회 2011 Current Applied Physics Vol.11 No.3
A trench MOS barrier Schottky (TMBS) rectifier formed by using high-energy boron trench-bottom implantation has been proposed. As compared to the conventional TMBS rectifier, this proposed device can achieve much larger reverse blocking voltage without considerable degradation of forward characteristics. By this scheme, the large peak electric field near the trench corner can be largely reduced due to charge compensation. In addition, owing to the presence of the counter-doped region, the second peak electric field is created below the trench bottom. Higher trench-bottom implantation energy may form wider boron dopant distribution, which facilitate larger alleviation of the second peak electric field. However, too high boron implantation energy may considerably cause dopant encroachment into the mesa region, which would increase the second electric field. Hence, properly high trench-bottom implantation energy should be employed to simultaneously cause low peak electric field at regions near the trench corner and below the trench bottom, thus providing a relatively high blocking voltage for this TMBS rectifier.
Ruey Shin Juang,Chun-Lan Yeh 한국생물공학회 2014 Biotechnology and Bioprocess Engineering Vol.19 No.1
The use of macroporous polymeric adsorptionresins for the recovery and purification of prodigiosin fromfermentation broth of Serratia marcescens SMDR wassystematically studied, in which the broth was pretreatedby coagulation with alum and the resulting precipitate wasleached by methanol/water solution. Of the seven resinstested, Diaion HP-20 resin was selected considering theadsorption and desorption abilities for prodigiosin at thesame time. The optimal compositions of liquid phases foradsorption and desorption were also examined. Batchexperiments were performed at 15 ~ 35oC by varying initialprodigiosin concentration in solution (0.05 ~ 0.5 mmol/L),in which molar fraction of each component in the solutionwas kept constant. The Freundlich and Langmuir equationswere used to describe adsorption isotherms and the relatedthermodynamic functions were also determined. Fixed-bedexperiments were finally conducted to obtain the breakthroughcharacteristics for the adsorption and desorption ofprodigiosin. Under optimized conditions, a purificationfactor of prodigiosin of 11.4 could be obtained from thepretreated broth after one adsorption-desorption run in fixedbed. The present results had demonstrated the promisingpotential of HP-20 resins for the recovery and purificationof prodigiosin from methanol/water solution of Serratiamarcescens fermentation broth.