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Design and synthesis of g-C3N4-doped Bi-MOF composites for high-efficient catalytic ozonation of 4-Nitrophenol: mechanism, effect parameters and degradation pathways analysis

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Applied Water Science 2025年第6期15卷 1-15页

作者： Wang, Wenli Tai, Yuehui Wu, Qian Shao, Shuai Zhao, Yuhui Cai, Lingxiao Liu, Qifeng College of Ecology and Environment Inner Mongolia University Hohhot People’s Republic of China College of Chemistry and Chemical Engineering Postdoctoral Research Station in Chemistry Inner Mongolia University Hohhot People’s Republic of China Inner Mongolia Coal Chemical Wastewater Treatment and Resource Utilization Engineering Technology Research Center Hohhot People’s Republic of China Inner Mongolia Key Laboratory of Pollution Control and Low Carbon Resource Utilization Hohhot People’s Republic of China

4-Nitrophenol (4-NP), a toxic and persistent pollutant in chemical wastewater, presents significant challenges in degradation and mineralization. Conventional ozone-oxidation catalysts are hindered by low efficiency, mass transfer constraints and metal leaching, necessitating the development of stable and efficient catalysts. Herein, the Bi-MOF/g-C3N4/MS composite materials were prepared by the solvothermal method and an immersion-induced phase separation strategy. The resulting materials were characterized and applied for catalytic ozonation degradation of 4-NP. Under the specific experimental conditions of the O3 + BiCN100/MS system, the total organic carbon and chemical oxygen demand removal rates of 4-NP were observed to reach 71.2% and 83.7% within 20 min, respectively. These two parameters were improved by raising the initial pH, reducing 4-NP concentration and increasing the catalyst dosage. The abundant Lewis acid sites were regarded as the pivotal catalytic site of BiCN100/MS, which were conducive to the adsorption of O3 and the acceleration of the formation of reactive oxygen species (ROS). The electron paramagnetic resonance results demonstrated that the primary ROS engaged in the degradation reaction were 1O2, ·O2− and ⋅OH. Toxicity analysis revealed that the O3 + BiCN100/MS system exhibited an effective detoxification effect. Ultimately, the primary degradation pathway of 4-NP was proposed through liquid chromatography–mass spectroscopy (LC–MS) analyses at varying reaction times. Additionally, BiCN100/MS demonstrated excellent stability and reusability in actual waste water cyclic experiments.

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RISK-SENSITIVE FIXED-POINT SMOOTHING ESTIMATION FOR LINEAR DISCRETE-TIME SYSTEMS WITH MULTIPLE OUTPUT DELAYS

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Journal of Systems Science & Complexity 2013年第2期26卷 137-150页

作者： ZHAO Hongguo CUI Peng Postdoctoral Research Station of School of Mathematics Shandong University School of Information Science and Technology Taishan University School of Control Science and Engineering Shandong University

This paper investigates the risk-sensitive fixed-point smoothing estimation for hnear omcrete-time systems with multiple time-delay measurements. The problem considered can be converted into an optimization one in indefinite space. Then the risk-sensitive fixed-point smoother is obtained by solving the optimization problem via innovation analysis theory in indefinite space. Necessary and sufficient conditions guaranteeing the existence of the risk-sensitive smoother are also given when the risk-sensitive parameter is negative. Compared with the conventional approach, a significant advantage of presented approach is that it provides less computational cost.

关键词： Innovation Riccati equation risk-sensitive time-delay.

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Two-Level Linear Relaxation Method for Generalized Linear Fractional Programming

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Journal of the Operations research Society of China 2023年第3期11卷 569-594页

作者： Hong-Wei Jiao You-Lin Shang Postdoctoral Research Base Henan Institute of Science and TechnologyXinxiang453003HenanChina Postdoctoral Research Station of Control Science and Engineering Henan University of Science and TechnologyLuoyang471023HenanChina

This paper presents an efficient algorithm for globally solving a generalized linear fractional programming *** establishing this algorithm,we firstly construct a two-level linear relaxation method,and by utilizing the method,we can convert the initial generalized linear fractional programming problem and its subproblems into a series of linear programming relaxation *** on the branch-and-bound framework and linear programming relaxation problems,a branch-and-bound algorithm is presented for globally solving the generalized linear fractional programming problem,and the computational complexity of the algorithm is ***,numerical experimental results demonstrate the feasibility and efficiency of the proposed algorithm.

关键词： Generalized linear fractional programming Global optimization Two-level linear relaxation method Branch-and-bound

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Fuzzy gain-scheduling output feedback controller design for saturated linear plants

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Journal of Harbin Institute of Technology(New Series) 2012年第6期19卷 79-86页

作者：班晓军邓宗全吴奋黄显林 Postdoctoral Research Station of Mechanical Engineering Harbin Institute of Technology School of Mechanical and Electrical Engineering Harbin Institute of Technology Dept. of Mechanical and Aerospace Engineering North Carolina State University Center for Control Theory and Guidance Technology Harbin Institute of Technology

In this paper, the control design problem for linear systems subject to actuator saturations is considered. A fuzzy gain-scheduling output feedback controller is proposed to guarantee the stability of the closed-loop system as well as providing disturbance/error attenuation measured in L2 norm. The synthesis condition is cast as a convex optimization problem in terms of linear matrix inequalities (LMIs) and can be solved efficiently. The ball-beam system is used to demonstrate the proposed saturation control approach.

关键词： fuzzy gain-scheduling controller output feedback actuator saturation disturbance rejection L2 gain

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Design of fixed-point smoother algorithm for linear discrete time-delay systems

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控制理论与应用（英文版） 2012年第4期10卷 523-527页

作者： Hongguo ZHAO Peng CUI Xiaochun GUO Postdoctoral Research Station of School of Mathematics Shandong University School of Information Science and Technology Taishan University School of Control Science and Engineering Shandong University

This paper investigates the fixed-point smoothing problems for linear discrete-time systems with multiple time-delays in the observations. The linear discrete-time systems considered have 1 ＋ 1 output channels. One is instanta- neous observation and the others are delayed. The fixed-point smoothers involving recursive algorithm and non-recursive algorithm are designed by using innovation analysis theory without relying on the system augmentation approach. Also, it is further shown that the design of fixed-point smoother comes down to solving 1 ＋ 1 Riccati equations with the same dimensions as the original systems.

关键词： Fixed-point smoothing Time-delay systems Innovation analysis

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research on transformer fault diagnosis based on multi-source information fusion

International Journal of Control and Automation

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International Journal of control and Automation 2014年第2期7卷 197-208页

作者： Wang, Xiaohui Wu, Kehe Xu, Yang Postdoctoral Mobile Research Station of Management Science and Engineering North China Electric Power University Beijing 102206 China School of Control and Computer Engineering North China Electric Power University Beijing 102206 China School of Control and Computer Engineering North China Electric Power University Beijing 102206 China

DGA (Dissolved Gas Analysis) is the traditional transformer fault diagnosis method, but it mainly depends on the experience of operators. In order to solve the limitations of traditional method, this paper introduces intelligent method for fault diagnosis of transformer. The intelligent method made fusion of various data, including SCADA data, oil dissolved gas sensor data, related electrical test data, operation maintenance records, and so on, employed space-time weighting fusion method based on BP neural network, and put forward the model of transformer fault diagnosis based on multi-source information fusion, which improved the accuracy of the transformer fault diagnosis dramatically. © 2014 SERSC.

关键词： Neural networks

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A Prognosis Method Evaluating Fault Tendency Percentage for Key Equipment in Urban Rail Transit Signal System Based on Enhanced Naive Bayesian Classifying 15

A Prognosis Method Evaluating Fault Tendency Percentage for ...

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15th COTA International Conference of Transportation Professionals: Efficient, Safe, and Green Multimodal Transportation, CICTP 2015

作者： Nai, Wei Zhang, Fangqi Yu, Yi Dong, Decun Postdoctoral Research Station of Control Science and Engineering Tongji University Shanghai201804 China Cooperative Center for Maglev and Rail Transit Operation Control System Tongji University Shanghai201804 China

ISBN: (数字)9780784479292

ISBN: (纸本)9780784479292

Signal System is the most important partof urban rail transit system and serves as the neural nervous part of the network. It is a thorny issue to enhance the surveillance of the key equipment in the urban rail transit signal system, and to do the accurate fault diagnosis and prognosis for them so as to realize active and accurate system equipment maintenance. In order to realize that, certain fault analysis methods, which should be not only able to determine whether certain kind of faults would take place, but be able to forecast the tendency of the fault as well, is needed. Naive Bayesian Classifying (NBC), which is widely used in big data analysis and data mining, is regarded as the basic method in fault diagnosis for the key equipment in urban rail transit;however, it is rarely used in fault prognosis, or it is only used in it combined with other data mining and analysis methods. By thoroughly analyzing the steps in Naive Bayesian Classifying, an intermediate parameter appears in the processing steps that can characterize the tendency if a certain class has been found. Utilizing this intermediate parameter Enhanced Naive Bayesian Classifying (ENBC) method proposed in this paper, the fault tendency percentage for the key equipment in urban rail transit signal system can be realized. By integrating ENBC into the maintenance and management system (MMS) of Shanghai Metro Line 8, and by analyzing a set of one week-long operating data sets, the effectiveness of the fault prognosis method has been proved. © ASCE.

关键词： Failure analysis

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Stress analysis between friction lining and strand of wire rope

Stress analysis between friction lining and strand of wire r...

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2014 International Conference on Simulation and Modeling Methodologies, Technologies and Applications, SMTA 2014

作者： Peng, Yuxing Li, Tongqing Yu, Yongli Zhu, Zhencai Wang, Dagang Cheng, Yanhai Ma, Wan Postdoctoral Research Station of Control Science and Engineering China University of Mining and Technology Xuzhou China School of Mechanical and Electrical Engineering China University of Mining and Technology Xuzhou China

ISBN: (纸本)9781845649821

Based on the theory of Hertz, the software ANSYS is adopted to analyze the equivalent stress and contact pressure of the sliding process between strand and lining. It is shown that within the time (t=15.182), the contact status is alternate between two point and three point, during the strand sliding with the lining, the peak sawtooth is emerged in the process of the equivalent stress and contact pressure increasing. Finally, the theoretical and simulation contact pressure are compared at initial of strand 5, which agrees with each other well. © 2014 WIT Press.

关键词： Stress analysis

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2D MCA numerical simulation of the contact behavior of lining and strand

2D MCA numerical simulation of the contact behavior of linin...

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2014 International Conference on Simulation and Modeling Methodologies, Technologies and Applications, SMTA 2014

作者： Peng, Yuxing Peng, Yuxing Li, Tongqing Yu, Yongli Zhu, Zhencai Wang, Dagang Cheng, Yanhai Ma, Wan Postdoctoral research station of Control Science And Engineering China University of Mining and Technology Xuzhou China School of Mechanical and Electrical Engineering China University of Mining and Technology Xuzhou China

ISBN: (纸本)9781845649821

Aiming at the high-speed slide accident of a mine hoist, the effect of pressure and sliding speed on the surface crack oflining’s were numerical simulated based on the method of 2D MCA. It is found that the crack destruction region of lining is enlarged and extended to inner layer gradually. The increasing sliding speed accelerates the damage of “cold welding” and fatigue on the surface crack, and as a result, it extends to the inner layer. With the pressure increasing, the indention of strand on the lining is more obviously. The increasing of pressure accelerates the asperities of strand cutting the surface of lining, and the damage of repeated plastic deformation. The motion of automatas move intensely nearby the contact region, and majority of bond between movable automatas are fracture, Finally, the surface material of lining are damage and destruct. Based on this study, the experiment results will supply the basic data support of the design of highperformance lining in the future. © 2014 WIT Press.

关键词： Linings

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Experiment research of the Electromagnetic Immunity Performance of the Electronic Current Transformer Card under Extreme Temperature

Experiment Research of the Electromagnetic Immunity Performa...

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2022 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2022

作者： Liu, Guanchen Ming, Guangqiang Yue, Xuhui Yuan, Jianping Yang, Junjie Gao, Weizhong Powerchina Huadong Engineering Corporation Ltd. Zhejiang University Postdoctoral Research Station Hangzhou China Postdoctoral Research Station Powerchina Huadong Engineering Corporation Ltd. Hangzhou China Hangzhou Huachen Electric Power Control Co. Ltd. Powerchina Huadong Engineering Corporation Ltd. Hangzhou China

ISBN: (数字)9781665492065

ISBN: (纸本)9781665492065

With the increasing voltage level of the smart grid, the electromagnetic environment of substation is getting more complex. The electronic devices placed on the high voltage side often impacted by the severe electromagnetic interference (EMI). In the northeastern or southern China, the secondary electronic devices in substation could withstand harsh natural temperature. The international standards of electromagnetic compatibility (EMC) and environmental reliability are tested separately, without considering their comprehension affect. However, the simulation of the electronic current transformer acquisition card in the actual working conditions is not sufficient. In this work, the electromagnetic immunity of the electronic current transformer card under extreme temperature studied, and the influence mechanism is analyzed. © 2022 IEEE.

关键词： Smart power grids

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