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Active Distribution System Planning for Low-carbon Objective using Cuckoo Search Algorithm
Bo Zeng,Jianhua Zhang,Yuying Zhang,Xu Yang,Jun Dong,Wenxia Liu 대한전기학회 2014 Journal of Electrical Engineering & Technology Vol.9 No.2
In this study, a method for the low-carbon active distribution system (ADS) planning is proposed. It takes into account the impacts of both network capacity and demand correlation to the renewable energy accommodation, and incorporates demand response (DR) as an available resource in the ADS planning. The problem is formulated as a mixed integer nonlinear programming model, whereby the optimal allocation of renewable energy sources and the design of DR contract (i.e. payment incentives and default penalties) are determined simultaneously, in order to achieve the minimization of total cost and CO₂ emissions subjected to the system constraints. The uncertainties that involved are also considered by using the scenario synthesis method with the improved Taguchi’s orthogonal array testing for reducing information redundancy. A novel cuckoo search (CS) is applied for the planning optimization. The case study results confirm the effectiveness and superiority of the proposed method.
Active Distribution System Planning for Low-carbon Objective using Cuckoo Search Algorithm
Zeng, Bo,Zhang, Jianhua,Zhang, Yuying,Yang, Xu,Dong, Jun,Liu, Wenxia The Korean Institute of Electrical Engineers 2014 Journal of Electrical Engineering & Technology Vol.9 No.2
In this study, a method for the low-carbon active distribution system (ADS) planning is proposed. It takes into account the impacts of both network capacity and demand correlation to the renewable energy accommodation, and incorporates demand response (DR) as an available resource in the ADS planning. The problem is formulated as a mixed integer nonlinear programming model, whereby the optimal allocation of renewable energy sources and the design of DR contract (i.e. payment incentives and default penalties) are determined simultaneously, in order to achieve the minimization of total cost and $CO_2$ emissions subjected to the system constraints. The uncertainties that involved are also considered by using the scenario synthesis method with the improved Taguchi's orthogonal array testing for reducing information redundancy. A novel cuckoo search (CS) is applied for the planning optimization. The case study results confirm the effectiveness and superiority of the proposed method.
Plastic Deformation Mechanism of the Ti6Al4V Micro-gear Formed Under an Electrical Field
Bo Zeng,Xiangzhong Yan,Zhiqiang Xie,Jian Liu,Jie Wang,Kunlan Huang,Yi Yang 한국정밀공학회 2024 International Journal of Precision Engineering and Vol.11 No.1
Despite the fact that titanium alloy micro-gear has superior performance and can withstand special conditions, it is difficult to machine due to its poor plasticity and high strength. We proposed an eco-friendly, efficient, and sustainable electric field assisted micro-plastic forming technology (micro-EFAPFT) for forming titanium alloy microparts. Ti-6Al-4 V alloy bars were extruded into micro-gears using an electrothermal coupling field and Joule heating in a graphite mold. The micro-gear has high precision, good surface quality, and a simple process. The whole process takes only 380 s. The findings demonstrate that the best gear forming degree, fewer microstructure defects, and hardness reaching 330.1 HV—4.4% higher than that of the raw material—occur when the pressure holding period is 120 s. During the plastic deformation process, phase transformation and recrystallization occur, increasing the fraction of α phase from 96.6–99.68% and increasing the grain orientation difference. The tooth tip has finer grains but longer dislocation lines. In conclusion, the electric field accelerates dislocation motion, reduces dislocation density, and increases material plasticity, allowing the Ti6Al4V micro-gear to be formed in a single step. The experimental results validate the feasibility of this technology for producing titanium alloy micro-gear and can be used to guide the production of different materials and shapes of microparts.
Antimicrobial glycoalkaloids from the tubers of Stephania succifera
Yan-Bo Zeng,Dai-Jing Wei,Wen-Hua Dong,Cai-Hong Cai,De-Lan Yang,Hui-Min Zhong,Wen-Li Mei,Hao Fu Dai 대한약학회 2017 Archives of Pharmacal Research Vol.40 No.4
Three new glycoalkaloids, N-formyl-asimilobine-2-O-b-D-glucoside (1), (-)-1-O-b-D-glucoside-8-oxotetrahydropalmatine(2), and 1-N-monomethylcarbamateargentinine-3-O-b-D-glucoside (3) were isolated fromtubers of Stephania succifera. The structures were establishedbased on spectroscopic analysis, and the antimicrobialactivities of the three glycoalkaloids are reported.
Two new sesquiterpenoids from endophytic fungus J3 isolated from Mangrove Plant Ceriops tagal
Yan-Bo Zeng,Hai-Gang Gu,Wen-Jian Zuo,Li-Li Zhang,Hong-Jin Bai,Zhi-Kai Guo,Peter Proksch,Wen Li Mei,Hao Fu Dai 대한약학회 2015 Archives of Pharmacal Research Vol.38 No.5
Two new sesquiterpenoids, named 2a-hydroxyxylaranolB (1) and 4b-hydroxyxylaranol B (2), togetherwith a known diterpenoid 3,4-seco-sonderianol (3) wereisolated from the fermentation of endophytic fungus J3 ofCeriops tagal. Their structures were elucidated based onspectroscopic methods including 1D and 2D NMR(HMQC, 1H-1H COSY and HMBC). All compounds wereevaluated for their cytotoxic activities by MTT method,and compound 3 exhibited cytotoxic activities againstK562, SGC-7901, and BEL-7402 cell lines.
Research on stochastic stability and stochastic bifurcation of suspended wheelset
Bo Zhang,Jing Zeng,Weiwei Liu 대한기계학회 2015 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.29 No.8
We studied the stochastic stability and bifurcation behavior for a suspended wheelset system in the presence of a Gauss white noisestochastic parametric excitation. First, the global stochastic stability was researched by judging the modality of the singular boundary. Then, the diffusion exponent, drift exponent and character value of the two boundaries were calculated. After getting the maximal Lyapunovexponent, the condition of D-bifurcation was obtained. By analyzing the shape and peaks of the stationary probability densityfunction, the condition of stochastic P-bifurcation was also obtained. Finally, the numerical verification and the comparison betweendeterministic bifurcation and P-bifurcation were performed. The results show that the random excitation shifts the critical velocity to alower value, and the stochastic system becomes more sensitive and more unstable. The stochastic parametric excitation can destroy theorigin subcritical Hopf bifurcation in the deterministic system.
Bo Yang,Yuesong Shen,Yun Su,Peiwen Li,Yan-Wei Zeng,Shubao Shen,Shemin Zhu 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.50 No.-
A novel Mn-Ce-Nb-Ox/P84 catalyticfilter for synergetic removal of particulates and NO was designed andprepared by a new method using functional foaming coating. Removal characteristics of nitrogen oxides(including catalyst loading amount, O2 concentration, NH3/NO molar ratio, H2O and SO2) andparticulates, were systematically studied. Results showed that the NO removal efficiency of catalyticfilter reached 95.3% at 200 C, as the catalyst loading amount,filtration velocity and mole ratio of NH3/NOwere set to be 450 g/m2, 1 m/min and 1, respectively. The removal characteristic of particulates of Mn-Ce-Nb-Ox/P84 catalyticfilter belonged surfacefiltration and the PM2.5 removal efficiency reached 99.98%.
Development of a strategy for the screening of α-glucosidase-producing microorganisms
Bo Zhou,Nan Huang,Wei Zeng,Hao Zhang,Guiguang Chen,Zhiqun Liang 한국미생물학회 2020 The journal of microbiology Vol.58 No.2
α-Glucosidase is a crucial enzyme for the production of isomaltooligosaccharide. In this study, a novel method comprising eosin Y (EY) and α-D-methylglucoside (AMG) in glass plates was tested for the primary screening of α-glucosidaseproducing strains. First, α-glucosidase-producing Aspergillus niger strains were selected on plates containing EY and AMG based on transparent zone formation resulting from the solubilization of EY by the hydrolyzed product. Conventional methods that use trypan blue (TB) and p-nitrophenyl-α-Dglucopyranoside (pPNP) as indicators were then compared with the new strategy. The results showed that EY-containing plates provide the advantages of low price and higher specificity for the screening of α-glucosidase-producing strains. We then evaluated the correlation between the hydrolytic activity of α-glucosidase and diffusion distance, and found that good linearity could be established within a 6–75 U/ml enzyme concentration range. Finally, the hydrolytic and transglycosylation activities of α-glucosidase obtained from the target isolates were determined by EY plate assay and 3,5- dinitrosalicylic acid-Saccharomyces cerevisiae assay, respectively. The results showed that the diameter of the transparent zone varied among isolates was positively correlated with α-glucosidase hydrolytic activity, while good linearity could also be established between α-glucosidase transglycosylation activity and non-fermentable reducing sugars content. With this strategy, 7 Aspergillus niger mutants with high yield of α-glucosidase from 200 obvious single colonies on the primary screen plate were obtained.
Aldehyde Volatiles Emitted in Succession from Mechanically Damaged Leaves of Poplar Cuttings
( Zeng Hui Hu ),( Ying Bai Shen ),( You Qing Luo ),( Fan Yi Shen ),( Hai Bo Gao ),( Rong Fu Gao ) 한국식물학회 2008 Journal of Plant Biology Vol.51 No.4
Plant aldehydes are volatiles necessary to defenses against environmental stress. To explore their emissions in response to wounding, we performed gas chromatography-mass spectrometry (GC-MS) on cuttings from poplar (Populus simonii×P. pyramidalis ``Opera 8277``) that were mechanically damaged to mimic herbivore attack. We detected 16 aldehydes, including 11 linear saturated aldehydes, 3 linear unsaturated aldehydes, and 2 non-linear aldehydes. Emissions of these aldehydes were clearly enhanced by such treatment, and exhibited a similar pattern of change, i.e., increasing in the first 2 h, then sharply decreasing before rising again at about 12 h. Two release peaks for these aldehydes were observed. Therefore, we propose two pathways for the mediation of aldehyde emissions following damage. The first peak may represent emissions from plant storage pools, whereas the second release peak might result from greater formation de novo through an activated synthesis pathway.
Containment Control of Multi-agent Systems with Time-delays over Heterogeneous Networks
Bo Li,Hong-yong Yang,Zeng-qiang Chen,Zhong-Xin Liu 제어·로봇·시스템학회 2019 International Journal of Control, Automation, and Vol.17 No.10
Containment control problems for second-order multi-agent systems with fixed communication timedelays under heterogeneous networks topologies are investigated. Based on Lyapunov-Krasovskii functional method and the linear matrix inequality (LMI) method, sufficient conditions on the communication digraph, the feedback gains, and the allowed upper bound of the time-delays to ensure containment control of the multi-agent systems using the different containment control algorithms are given. Finally, numerical simulations are presented to demonstrate theoretical results.