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IEEE/CAA Journal of Automatica Sinica 2023年第6期10卷 1421-1433页

作者： Haihua Guo min Meng Gang feng the Department of Biomedical Engineering City University of Hong KongHong KongChina the Department of Control Science and Engineering College of Electronics and Information Engineeringand Shanghai Research Institute of Intelligent Autonomous SystemsTongji UniversityShanghai 200092China

This paper considers the mean square output containment control problem for heterogeneous multi-agent systems(MASs)with randomly switching topologies and nonuniform distributed *** modeling the switching topologies as a continuous-time Markov process and taking the distributed delays into consideration,a novel distributed containment observer is proposed to estimate the convex hull spanned by the leaders'states.A novel distributed output feedback containment controller is then designed without using the prior knowledge of distributed *** constructing a novel switching Lyapunov functional,the output containment control problem is then solved in the sense of mean square under an easily-verifiable sufficient ***,two numerical examples are given to show the effectiveness of the proposed controller.

关键词： Heterogeneous multi-agent systems Lyapunov method Markovian switching topologies output containment control time delays

Polarization visualization for low-irradiance regions by perceptually uniform color space

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Defence Technology（防务技术） 2021年第2期17卷 505-511页

作者： feng Zhao Yue Dong jian-lei Zhang Xi’an University of Posts and Telecommunications School of Electronic EngineeringXi’an710121China

Currently,polarization visualization strategies are accomplished by mapping polarization information into a perceptually uniform color appearance model ***,the deviation of the CAM02-UCS space from the lightness prediction results in an inaccurate match between the polarization information and the perceptual *** this paper,we propose a novel polarization visualization strategy based on the perceptual uniform space *** polarization visualization be completed by placing the polarization information into the lightness Jz,colorfulness Cz and hue angle hz channels of the Jzazbz *** experimental results show that the proposed method can significantly improve the lightness of the low irradiance and high polarization region,hence more polarization information can be sensed by human visual system.

关键词： Polarization visualization Perceptually uniform space Lightness prediction Low irradiance

Bioinformatic analysis and functional characterization of CFEM proteins in Setosphaeria turcica

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Journal of Integrative Agriculture 2021年第9期20卷 2438-2449页

作者： WANG jian-xia LONG feng ZHU Hang ZHANG Yan WU jian-ying SHEN Shen DONG Jin-gao HAO Zhi-min State Key Laboratory of North China Crop Improvement and Regulation/Key Laboratory of Hebei Province for Plant Physiology and Molecular Pathology College of Life SciencesHebei Agricultural UniversityBaoding 071001P.R.China College of Plant Protection Hebei Agricultural UniversityBaoding 071001P.R.China

Common in Fungal Extracellular Membrane(CFEM)domains are uniquely found in fungal extracellular membrane proteins which are important for *** study identified 13 StCFEM proteins in the genome of Setosphaeria turcica,the hemibiotrophic fungus that causes northern corn leaf *** alignment and WebLogo analysis of their CFEM domains indicated that the amino acids were highly conserved and that,with the exception of StCFEM1,2,3,and 6,they contained eight *** analysis suggested that these 13 proteins(StCFEM1–13)could be divided into 2 clades based on the presence of the trans-membrane *** StCFEM proteins with a signal peptide and without a trans-membrane domain were considered as candidate effector *** CFEM domain in the candidate effector proteins could form a helical-basket structure homologous to Csa2 in Candida *** analysis suggested that the 13 genes were expressed during fungal infection and a yeast secretion assay revealed that these candidate effectors were secreted *** was also found that StCFEM3,4,and 5 couldn't affect BAX/INF1-induced programmed cell death(PCD)in Nicotiana benthamiana and while StCFEM12 could suppress INF1-induced PCD,it showed no effect on BAXinduced *** study found that there were 13 members of the *** CFEM protein family and that StCFEM12 was a candidate *** study laid the foundation for illustrating the roles of CFEM proteins during the pathogenic processes of phytopathogens.

关键词： CFEM domain effector Setosphaeria turcica signal peptide PCD

Experimental Study on New Multi-Column Tension-Leg-Type Floating Wind Turbine

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China Ocean Engineering 2018年第2期32卷 123-131页

作者： ZHAO Yong-sheng SHE Xiao-he HE Yan-ping YANG jian-min PENG Tao KOU Yu-feng State Key Laboratory of Ocean Engineering Shanghai Jiao Tong UniversityShanghai 200030China Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration(CISSE) Shanghai Jiao Tong UniversityShanghai 200030China Shanghai University of Engineering Science School of ManagementShanghai 201620China

Deep-water regions often have winds favorable for offshore wind turbines, and floating turbines currently show the greatest potential to exploit such winds. This work established proper scaling laws for model tests, which were then implemented in the construction of a model wind turbine with optimally designed blades. The aerodynamic,hydrodynamic, and elastic characteristics of the proposed new multi-column tension-leg-type floating wind turbine(Wind Star TLP system) were explored in the wave tank testing of a 1:50 scale model at the State Key Laboratory of Ocean Engineering at Shanghai Jiao Tong University. Tests were conducted under conditions of still water, white noise waves, irregular waves, and combined wind, wave, and current loads. The results established the natural periods of the motion, damping, motion response amplitude operators, and tendon tensions of the Wind Star TLP system under different environmental conditions, and thus could serve as a reference for further research.

关键词： floating wind turbine model test WindS tar TLP dynamic response

Environmental boundary and formation mechanism of different types of H2S corrosion products on pipeline steel

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International Journal of minerals,Metallurgy and Materials 2017年第4期24卷 401-409页

作者： Lei Zhang Hui-xin Li feng-xian Shi jian-wei Yang Li-hua Hu min-xu Lu Institute for Advanced Materials and Technology University of Science and Technology Beijing Beijing 100083 China Aircraft Engine Corporation of China Shanghai Commercial Aircraft Engine Manufacturing Co. Ltd. Shanghai 201306 China Shougang Research Institute of Technology Beijing 100043 China China National Offshore Oil Corporation Research Institute Beijing 100027 China

To establish an adequate thermodynamic model for the mechanism of formation of hydrogen sulfide (H2S) corrosion products, theoretical and experimental studies were combined in this work. The corrosion products of API X60 pipeline steel formed under different H2S corrosion conditions were analyzed by scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray diffraction. A thermodynamic model was developed to clarify the environmental boundaries for the formation and transformation of different products. Presumably, a dividing line with a negative slope existed between mackinawite and pyrrhotite. Using experimental data presented in this study combined with previously published results, we validated the model to predict the formation of mackinawite and pyrrhotite on the basis of the laws of thermodynamics. The established relationship is expected to support the investigation of the H2S corrosion mechanism in the oil and gas industry. © 2017, University of Science and Technology Beijing and Springer-Verlag Berlin Heidelberg.

关键词： Energy dispersive spectroscopy Forecasting Gas industry Iron ores Pipelines Scanning electron microscopy Steel corrosion Steel pipe Thermodynamic properties Thermodynamics X ray diffraction X ray spectroscopy

Robust Stability and Stabilization of Discrete Singular Systems with Interval Time-varying Delay and Linear Fractional Uncertainty

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International Journal of Automation and computing 2012年第1期9卷 8-15页

作者： jian-min Jiao Department of Mathematics Baoji University of Arts and Sciences Baoji 721013 PRC

The robust stability and robust stabilization problems for discrete singular systems with interval time-varying delay and linear fractional uncertainty are discussed. A new delay-dependent criterion is established for the nominal discrete singular delay systems to be regular, causal and stable by employing the linear matrix inequality （LMI） approach. It is shown that the newly proposed criterion can provide less conservative results than some existing ones. Then, with this criterion, the problems of robust stability and robust stabilization for uncertain discrete singular delay systems are solved, and the delay-dependent LMI conditions are obtained. Finally, numerical examples are given to illustrate the effectiveness of the proposed approach.

关键词： Discrete singular systems time-varying delay linear fractional uncertainty robust stability robust stabilization linear matrix inequality (LMI).

Mobilities and leachabilities of heavy metals in sludge with humus soil

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Journal of Environmental Sciences 2011年第2期23卷 247-254页

作者： Rui Zhu min Wu jian Yang State Key Laboratory of Pollution Control and Resources Reuse Tongji University Shanghai 200092 China.

Chemical forms of Zn, Ni, Cu, and Pb in municipal sewage sludge were investigated by adding humus soil to sludge and by performing sequential extraction procedures. In the final sludge mixtures, Zn and Ni were mainly found in Fe/Mn oxide-bound （F3） and organic matter/sulfide-bound （F4） forms. For Zn, exchangeable （F1）, carbonate-bound （F2）, and F3 forms were transformed to F4 and residual forms （F5）. For Ni, F1 and F2 forms were transformed to F1, F2, and F3 forms. Both Cu and Pb were strongly associated with the stable forms F4 and F5. For Cu, F2 and F3 forms were major contributors, while for Pb, F3 and F4 forms were major contributors to F5. Humus soil dosage and pH conditions in the sludge were strongly correlated with the forms of heavy metals. Five forms were used to evaluate metal mobilities in the initial and final sludge mixtures. The mobilities of the four heavy metals studied decreased after 28 days. The metal mobilities in the final sludge mixtures were ranked in the following order： Ni 〉 Zn 〉 Cu = Pb. Leaching tests showed that the mobilities of Zn and Ni in lower pH conditions （pH 4） were higher than those in higher pH conditions （pH 8）.

关键词： sludge heavy metal humus soil mobility leachability

Preparation and catalytic activity of CO-resistant catalyst core-shell Au@Pt/C for methanol oxidation

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Rare Metals 2012年第5期31卷 451-456页

作者： feng Rongjuan LI min LIU Jiaxiang College of Materials Science and Engineering Laboratory of Electrochemical Process and Technology for Materials Beijing University of Chemical Technology Beijing 100029 China

Au@Pt core-shell nanoparticles were successfully synthesized by a successive reduction method and then assembled on Vulcan XC-72 carbon surface. Furthermore, its composition, morphology, structure, and activity towards methanol oxidation were characterized by UV-vis spectrometry, transmission electron microscopy (TEM), high-resolution TEM (HRTEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and cyclic voltammetry (CV). Results reveal that Au@Pt/C catalyst has better activity towards methanol oxidation than the pure platinum prepared under the same conditions. When the atomic ratio of Au to Pt in the prepared Au@Pt/C catalyst is 1:2, this catalyst exhibits best electrocatalytic activity towards methanol oxidation in acidic media, and the peak current density on this catalyst is ~2.0 times higher than that on Pt/C catalyst. The better catalytic activity of Au@Pt/C results from its better resistance to toxic CO than Pt/C because the CO oxidation on Au@Pt/C is 60 mV more negative than the case on Pt/C. © The Nonferrous Metals Society of China and Springer-Verlag Berlin Heidelberg 2012.

关键词： Carbon Cobalt Cyclic voltammetry Electrocatalysts Gold Methanol Nanoparticles Oxidation Photoelectrons Platinum Platinum alloys Synthesis (chemical) Transmission electron microscopy X ray diffraction X ray photoelectron spectroscopy

Corrosion behavior of low-carbon Cr micro-alloyed steel for grounding grids in simulated acidic soil

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Journal of Iron and Steel Research International 2018年第7期25卷 755-766页

作者： jian Li Hang Su feng Chai Dong-mei Xue Li Li Xiang-yang Li Hui-min Meng Division of Engineering Steel Central Iron and Steel Research Institute Beijing 100081 China Enterprise Management Department China Iron and Steel Research Institute Group Beijing 100081 China Corrosion and Protection Center University of Science and Technology Beijing Beijing 100083 China

To improve the corrosion resistance of steels for grounding grids, a low-carbon Cr micro-alloyed steel was developed （C 1 steel）, and corrosion behavior of Q235 steel and newly developed C1 steel in simulated acidic soil was investigated. The corrosion rate was evaluated with the mass loss measurements, while the corrosion morphology of surface and cross section of rust layer was observed by scanning electron microscopy. The corrosion products were analyzed by energy- dispersive X-ray spectrometry, X-ray diffraction and X-ray photoelectron spectroscopy, and the polarization curve was measured using potentiodynamic polarization method. Results indicated that C 1 steel displayed good corrosion resistance in the simulated acidic soil, of which the corrosion rate was only 30% of that of Q235 steel after corrosion for 360 h. The analysis of rust layer showed that lower carbon content in steel could reduce the tendency of micro cell corrosion and appropriate amount of chromium could improve the corrosion potential of metal matrix. Moreover, the analysis of X-ray photoelectron spectroscopy revealed that the chromium enriched in inner rust layer of C1 steel existed mainly in the form of Fe2CrO4, which facilitated the formation of Cr-goethite and improved the protection of corrosion products.

关键词： Soil corrosion Grounding grid Low-carbon steel Cr micro-alloying Corrosion product - Cr-goethite

Soundscape of the West Lake Scenic Area with profound cultural background—a case study of Evening Bell Ringing in Jingci Temple,China

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2013年第3期14卷 219-229页

作者： jian GE min GUO Miao YUE Deptartment of Architecture Zhejiang University State Key Lab of Subtropical Building Science South China University of Technology Deptartment of Architecture and Art Zhejiang College of Construction

From the case study of Evening Bell Ringing at Nanping Hill,one of the West Lake Cultural Landscapes in Hangzhou,China,we investigated the soundscape of a scenic area with a profound cultural ***,we conducted the soundscape physical index of the area in both winter and spring seasons to analyze its objective graphical ***,we focused on people's reactions to the soundscape in order to obtain a subjective evaluation of each component in the soundscape and integrated ***,the relationship between the objective data and the subjective evaluation was ***,the impacts of the natural environment,history,and cultural factors on the evaluation of the Jingci Temple soundscape were *** was found that natural sounds,cultural sounds,and historic sounds were widely acclaimed in people's subjective feelings,which indicated the close relationships among historical and cultural background,soundscape,and natural ***,the conclusion was made that soundscape should be consistent with the local natural environment and the historical and cultural background.

关键词： Soundscape Culture Evaluation West Lake Evening Bell Ringing at Nanping Hill