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Performance of fluidized bed electrode in a molten carbonate fuel cell anode
Jubing Zhang,Zhaoping Zhong,Jianmin Xiao,Zongming Fu,Jinxiao Zhao,Weiling Li,Min Yang 한국화학공학회 2011 Korean Journal of Chemical Engineering Vol.28 No.8
A fluidized bed electrode could lower concentration polarization and activation polarization because of its high mass and heat transfer coefficient. The polarization characteristics of the fluidized bed electrode are systematically investigated in a molten carbonate fuel cell anode with an O_2/CO_2/gold reference electrode. The results show that polarization performance of the anode is improved by selecting proper flow rates of H_2, O_2 and CO_2, choosing suitable nickel particle content together with appropriate O_2/CO_2 ratio, and increasing reaction temperature as well as the area of the current collector. Limiting current density of 115.56 mA·cm^(−2) is achieved under optimum performance as follows:a cylindrically curved nickel plate current collector, nickel particle content of 7.89%, the reaction temperature of 923 K,H_2 flow rate of 275 mL·min^(−1), O_2/CO_2 flow rate of 10/20 mL·min−1 and O_2/CO_2 ratio of 1 : 2.
Wang Chen-Song,Suo Ni,Huang Hao,Wu Ai-min,Cao Guo-Zhong,Zhang Gui-Feng 한국탄소학회 2019 Carbon Letters Vol.29 No.5
Boron-doped amorphous carbon (BDAC) thin films with a regular oxygen reduction reaction (ORR) catalytic activity were synthesized in a hot filament chemical vapor deposition device using a mixture of CH4 and H2 as a gas source and B2O3 as a boron source and then oxidized in air at 380–470 °C for 15–75 min. Scanning electron microscope, transmission electron microscope, Raman spectroscopy, X-ray photoelectron spectroscopy, and electrochemical tests were used to characterize the physical and electrochemical properties of the BDAC catalysts. It was concluded that the BDAC catalyst oxidized at 450 °C for 45 min showed the best ORR catalytic activity in alkaline medium. The oxygen reduction potential and the transfer electron number n, respectively, are − 0.286 V versus Ag/AgCl and 3.24 from the rotating disk electrode experiments. The treated carbon film has better methanol resistance and stability than the commercial Pt/C catalyst.
Chen‑Song Wang,Ni Suo,Hao Huang,Ai‑min Wu,Guo‑Zhong Cao,Gui‑Feng Zhang 한국탄소학회 2019 Carbon Letters Vol.29 No.5
Boron-doped amorphous carbon (BDAC) thin films with a regular oxygen reduction reaction (ORR) catalytic activity were synthesized in a hot filament chemical vapor deposition device using a mixture of CH4 and H2 as a gas source and B2O3 as a boron source and then oxidized in air at 380–470 °C for 15–75 min. Scanning electron microscope, transmission electron microscope, Raman spectroscopy, X-ray photoelectron spectroscopy, and electrochemical tests were used to characterize the physical and electrochemical properties of the BDAC catalysts. It was concluded that the BDAC catalyst oxidized at 450 °C for 45 min showed the best ORR catalytic activity in alkaline medium. The oxygen reduction potential and the transfer electron number n, respectively, are − 0.286 V versus Ag/AgCl and 3.24 from the rotating disk electrode experiments. The treated carbon film has better methanol resistance and stability than the commercial Pt/C catalyst.
A prediction model of the sum of container based on combined BP neural network and SVM
Min-jie Ding,Shao-zhong Zhang,Haidong Zhong,Yao-hui Wu,Liang-bin Zhang 한국정보처리학회 2019 Journal of information processing systems Vol.15 No.2
The prediction of the sum of container is very important in the field of container transport. Many influencingfactors can affect the prediction results. These factors are usually composed of many variables, whosecomposition is often very complex. In this paper, we use gray relational analysis to set up a proper forecastindex system for the prediction of the sum of containers in foreign trade. To address the issue of the lowaccuracy of the traditional prediction models and the problem of the difficulty of fully considering all the factorsand other issues, this paper puts forward a prediction model which is combined with a back-propagation (BP)neural networks and the support vector machine (SVM). First, it gives the prediction with the data normalizedby the BP neural network and generates a preliminary forecast data. Second, it employs SVM for the residualcorrection calculation for the results based on the preliminary data. The results of practical examples show thatthe overall relative error of the combined prediction model is no more than 1.5%, which is less than the relativeerror of the single prediction models. It is hoped that the research can provide a useful reference for theprediction of the sum of container and related studies.
Zhong-wei Li,Chun-gang Min,Ai-min Ren,Jing-fu Guo,John D. Goddard,Ji-kang Feng,Liang Zuo 대한화학회 2010 Bulletin of the Korean Chemical Society Vol.31 No.4
In order to find a relationship between firefly luciferases structure and bioluminescence spectra, we focus on excited substrate geometries which may be affected by rigid luciferases. Density functional theory (DFT) and time dependent DFT (TDDFT) were employed. Changes in only six bond lengths of the excited substrate are important in determining the emission spectra. Analysis of these bonds suggests the mechanism whereby luciferases restrict more or less the excited substrate geometries and to produce multicolor bioluminescence.
( Ri Zhong Zeng ),( Han Geun Kim ),( Min Geun Gim ),( Mi Yeon Ko ),( Seung Yeon Lee ),( Chul Min Kim ),( Dae Kyun Chung ) 한국응용생명화학회(구 한국농화학회) 2011 Applied Biological Chemistry (Appl Biol Chem) Vol.54 No.5
The lipoteichoic acid (LTA) of Staphylococcus aureus (aLTA) and Lactobacillus plantarum (pLTA) engage the same toll-like receptor 2 (TLR2) signaling pathway but exert different effects on innate immunity and inflammation. The mechanisms underlying these differential effects are not yet clear. Human oligonucleotide microarrays were used to investigate the transcriptome of human THP-1 monocytes upon exposure to aLTA or pLTA, and differential gene expression profiles were observed between the aLTA- and pLTA-treated cells. The expression level of 1,302 genes in aLTAtreated cells increased more than 2-fold; some of which have been implicated in immune or inflammatory responses, cell adhesion, cell signal transduction, transcription factors, anion transport, proteolysis, and oxidative processes. Particularly, a variety of genes that encode cytokines and chemokines, and TLR signaling-related molecules belonging to the tumor necrosis factor receptor-associated factor (TRAF), nuclear factor-kappa B, and signal transducer and activator of transcription families were remarkably up-regulated by aLTA stimulation. In contrast, pLTA treatment altered the expression of only 90 genes by more than 1.5-fold, and these genes were not correlated with innate immunity, inflammation or other related processes. The different effects mediated by aLTA and pLTA were further verified and compared by analysis of the expression of a selected group of genes, including TRAFs and some cytokines and chemokines, using real time-polymerase chain reaction and ELISA. These data suggest that aLTA and pLTA have different immunomodulatory potentials. Compared with pLTA, aLTA is a stronger stimulator and impacts the expression of many innate immunity- and/or inflammation-related genes.
Li, Zhong-Wei,Min, Chun-Gang,Ren, Ai-Min,Guo, Jing-Fu,Goddard, John D.,Feng, Ji-Kang,Zuo, Liang Korean Chemical Society 2010 Bulletin of the Korean Chemical Society Vol.31 No.4
In order to find a relationship between firefly luciferases structure and bioluminescence spectra, we focus on excited substrate geometries which may be affected by rigid luciferases. Density functional theory (DFT) and time dependent DFT (TDDFT) were employed. Changes in only six bond lengths of the excited substrate are important in determining the emission spectra. Analysis of these bonds suggests the mechanism whereby luciferases restrict more or less the excited substrate geometries and to produce multicolor bioluminescence.
Design of ITLMS In-transit Logistics Monitoring System
Yao Zhong-min,Si Hong-yan,Lu Yanyang 보안공학연구지원센터 2015 International Journal of u- and e- Service, Scienc Vol.8 No.12
A design of in-transit logistics remote video monitoring system is proposed based on cotex-A8 processor hardware and Android software systems platform, by the terminal USB infrared camera driver transplant, video streaming H.264 codec, and 3G wireless transmission network, the in-transit logistics remote video monitoring real-time display is achieved, which can prevent the loss of goods and cargo in logistics process and be served as the evidence for the responsibility distinguishing in the event of goods damage. Managers and customers can track the transport status of goods by computer or mobile phone in real-time, and provide better service to customer, therefore enhance the competitiveness of logistics enterprises.
Identification of a Novel Human Zinc Finger Gene, ZNF438, with Transcription Inhibition Activity
( Zhao Min Zhong ),( Bo Wan ),( Yun Qiu ),( Jun Ni ),( Wen Wen Tang ),( Xin Ya Chen ),( Yun Yang ),( Su Qin Shen ),( Ying Wang ),( Mei Rong Bai ),( Qing Yu Lang ),( Long Yu ) 생화학분자생물학회 2007 BMB Reports Vol.40 No.4