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SSRN 2022年

作者： Dong, Pingping Jing, Xiaoxu Li, Yungui Shen, Yi Li, Qingqing Fang, Qile Advanced Institute of Natural Sciences Beijing Normal University Zhuhai519087 China Sichuan Provincial Sci-Tech Cooperation Base of Low-cost Wastewater Treatment Technology Department of Environmental Engineering Southwest University of Science and Technology Mianyang621010 China State Key Laboratory of Water Environment Simulation School of Environment Beijing Normal University Beijing100875 China Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province College of Environment Zhejiang University of Technology Hangzhou310032 China

Phosphorus (P) discharge is well recognized as the chief culprit of eutrophication and algal blooms. It is of pressing need to remove excessive phosphorus to protect the important watershed. Lanthanum (La) based materials are one type of attention-grabbing adsorbent due to their superior affinity to phosphate. Here, a La-Fe cyanometallate (CM) framework with a novel "twin lotus flower" structure is synthesized and rich hierarchical pores were fabricated via pyrolysis. The resultant "twin lotus flower" oxide of LaFe CM-500 is demonstrated to be a high-performance adsorbent for phosphate removal with a saturated capacity as high as 45.03 mg P/g. It also possesses superior removal ability for the stubborn low concentration of P pollution. The abundant hierarchical pores (from macropore to micropore) render a rapid diffusion of phosphate on the LaFe CM-500. The La components on porous adsorbent are verified to be the key active sites that form stable LaPO 4 via a ligand exchange process. The effects of solution conditions (temperature, pH, co-existing ions, and humic acid) are also investigated, and a high selectivity for phosphate adsorption enables the as-prepared "twin lotus flower" adsorbent to be competitive in practical water body treatment. © 2022, The Authors. All rights reserved.

关键词： Eutrophication

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Fractional order PID control of microbial fuel cell based on Kalman filter

Fractional order PID control of microbial fuel cell based on...

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第32届中国过程控制会议(CPCC2021)

作者： Yingying Zhao Minmin Wang Aimin An Minan Tang Dongsong Luo Feihong He Yinying Fan College of Electrical and Information Engineering Lanzhou University of Technology Key Laboratory of Gansu Advanced Control for Industrial Processes Lanzhou University of Technology National Demonstration Center for Experimental Electrical and Control Engineering Education Lanzhou University of Technology College of Automation and Electrical Engineering Lanzhou Jiaotong University Gansu Province Special Equipment Inspection and Testing Institute College of Foreign Languages Lanzhou University of Technology

In the actual fractional order PID control system of microbial fuel cell(MFC),the existence of interference noise seriously affects the control quality of the *** at this problem,a fractional order PID control strategy based on Kalman filter is *** Kalman filter is used to realize the optimal estimation of the state of the MFC system,eliminate uncertain factors such as interference noise,and provide more accurate state information for the fractional order PID controller,thereby improving the performance of the *** simulation results show that,compared with the conventional fractional order PID control,the fractional order PID control based on Kalman filter can effectively compensate the influence of interference on the MFC system,the steady-state accuracy is improved obviously,and the entire control process is smoother,at the same time,the anti-interference ability of the system is improved significantly,which effectively improves the ability of the MFC power generation system to operate stably in a complex environment.

关键词： Microbial fuel cell Fractional order PID control Kalman filter Anti-interference ability

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Identification of key Factors Affecting Neonicotinoid Residues in Crops and Risk of Dietary Exposure

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SSRN 2023年

作者： Yu, Wenfei Wu, Ruxin Zhang, Li Ling, Jun Yang, Dan Qu, Jiajia Tao, Zhen Meng, Ruirui Shen, Yuexing Yu, Jingtong Lin, Nan Wang, Bin Jin, Hangbiao Zhao, Meirong Chen, Yuanchen Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province College of Environment Zhejiang University of Technology Zhejiang Hangzhou310032 China Department of Environmental Health School of Public Health Shanghai Jiao Tong University Shanghai200025 China Department of Epidemiology and Biostatistics School of Public Health Peking University Beijing100191 China Institute of Reproductive and Child Health School of Public Health Peking University Beijing100191 China Key Laboratory of Reproductive Health National Health and Family Planning Commission of the People’s Republic of China Beijing100191 China

Because neonicotinoids are widely used in farmland, they are ubiquitous in food, but their distribution among different crops and exposure risks at provincial level in China remain unclear. Thus, we collected 19 types of crop samples, including fruits, vegetables, and tea, from farmland in nine prefectural cities in Zhejiang Province of China, and quantified nine widely commercialized neonicotinoids in the edible parts. High detection rate (42.1%-82.9%) and residual concentrations of neonicotinoids (277.6 ± 356.6 ng/g) were found, with the highest residual level in tea, followed by fruit, and lowest in vegetables (P © 2023, The Authors. All rights reserved.

关键词： Crops

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Chronic Effects of Benzalkonium Chlorides on Short Chain Fatty Acids and Methane Production in Semi-Continuous Anaerobic Digestion of Waste Activated Sludge

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SSRN 2022年

作者： Yang, Chun-Xue He, Zhang-Wei Liu, Wen-Zong Wang, Ai-Jie Wang, Ling Liu, Jia Liu, Bao-Ling Ren, Nan-Qi Yu, Shao-Peng Guo, Ze-Chong Heilongjiang Province Key Laboratory of Cold Region Wetland Ecology and Environment Research School of Geography and Tourism Harbin University Harbin China National Technology Innovation Center of Synthetic Biology Tianjin Institute of Industrial Biotechnology Chinese Academy of Sciences Tianjin China Shanxi Key Laboratory of Environmental Engineering Key Laboratory of Northwest Water Resource Environment and Ecology MOE School of Environmental and Municipal Engineering Xi’an University of Architecture and Technology Xi’an China State Key Laboratory of Urban Water Resource and Environment Shenzhen Key Laboratory of Organic Pollution Prevention and Control Harbin Institute of Technology Shenzhen Shenzhen China School of Environmental & Municipal Engineering Qingdao University of Technology Qingdao China School of Environmental and Chemical Engineering Jiangsu University of Science and Technology Zhenjiang China

Benzalkonium chlorides (BACs) are one kind of emerging pollutants in wastewater and potentially enriched in waste activated sludge (WAS) because of its quick adsorption but slow degradation under anaerobic condition, which will impact acidogenesis and methanogenesis in anaerobic digestion (AD). It is worthy to well understand the microbial response mechanism under chronic effects of BACs for resource recovery from WAS. This study investigated the AD (by-)products and microbial evolution under low to high BACs concentrations from bioreactor startup to steady running. It was found that BACs can lead to an increase of WAS hydrolysis and fermentation, but a disturbance to acidogenic bacteria also occurred at low BACs concentration, while a noticeable inhibition to methanogenesis occurred when BAC concentration was up to 15 mg/g TSS. The analysis of metabolic pathways showed that BACs shifted the metabolism of short chain fatty acids (SCFAs), and the improved the propionic acid (HPr) reduction process, while the relative abundance of Clostridium and Longilinea were increased. Furthermore, the functional species involved in methane metabolism had succeeded from aceticlastic methanogens to hydrogenotrophic methanogens, while the abundance of coding genes in converged stage was reduced by BACs, which finally led to a decline in methane production. © 2022, The Authors. All rights reserved.

关键词： Methane

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Predictor-based disturbance rejection control design for low-order stable and integrating processes with time delay

Predictor-based disturbance rejection control design for low...

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第三十九届中国控制会议

作者： Rudong Zang Shoulin Hao Tao Liu Qing-Guo Wang Key Laboratory of Intelligent Control and Optimization for Industrial Equipment of Ministry of Education Dalian University of Technology Institute of Advanced Control Technology Dalian University of Technology Institute for Intelligent Systems The University of Johannesburg

In this paper, a novel predictor-based disturbance rejection control scheme is proposed for industrial stable and integrating processes with time delay. Two realizable differentiators with finite gain are first introduced to estimate the derivatives of the delay-free output response given by a generalized predictor. Then, a predicted disturbance response is constructed for feedforward compensation by using the input signal along with the delay-free output response and its estimated derivatives. By specifying the desired closed-loop poles, the feedback controller is derived analytically. A prominent advantage of the proposed control scheme lies in that a trade-off between the control performance and its robustness against process uncertainties can be made by monotonically tuning the adjustable parameters in the prediction filter, differentiator and feedback controller, respectively. The necessary and sufficient condition for robust stability of the closed-loop system is established based on the small gain theorem. Two illustrative examples from the literature are adopted to demonstrate the effectiveness and superiority of the proposed control scheme.

关键词： Disturbance rejection time delay dead-time compensator realizable differentiator robust stability

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Insights into Defect Effect of Photocatalytic 2e− Orr: Radical Reaction and Electronic Behavior

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SSRN 2022年

作者： Shen, Yi Yao, Yanchi Lu, Lun Zhu, Chao Fang, Qile Wang, Jun Song, Shuang Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province College of Environment Zhejiang University of Technology Hangzhou310032 China State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment South China Institute of Environmental Sciences Ministry of Ecology and Environment Guangzhou510655 China College of Chemical Engineering Zhejiang University of Technology Hangzhou310032 China Advanced Institute of Natural Sciences Beijing Normal University Zhuhai Campus Zhuhai519087 China State Key Laboratory of Separation Membranes and Membrane Processes School of Environmental Science and Engineering Tiangong University Tianjin300387 China

The oxygen reduction reaction (ORR) is a promising application, but the structure-activity relationship between defect and photocatalytic 2e− ORR remains largely obscure. In this work, metal-organic frameworks (MOFs) with missing linker-cluster domain (MLCD) defects were employed to explore the underlying mechanism required for comprehensively understanding the MLCD defect effect on photocatalytic 2e− ORR, which mainly focused on the radical reaction and electronic behavior. Experiments and theoretical calculations revealed that incorporating MLCD defects significantly inhibits efficient photocatalytic kinetics, which might be attributed to the retarded charge transfer and variation in electronic behaviors. Meanwhile, the marginalized defective cluster showed undesirable electron dissipation and the augmented orbital-limited resistance induced by electron spin polarization, hindering the interfacial charge transfer through the "Ti-O" Bridge, which was unfavorable for O2 activation. This study provides insights into the internal mechanism of photocatalytic 2e− ORR for designing and optimizing excellent defective nanomaterials. © 2022, The Authors. All rights reserved.

关键词： Defects

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Dual activation pathways based on OH-functionalized alk-Ti 3 C 2 MXene/RuO x boosting the hydrogen generation

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Chinese Chemical Letters 2025年第8期36卷

作者： Chongbei Wu Benzhi Wang Xuan Li Jiaxuan Gu Yihan Wu Zhe Zhao Pengfei Jia Jizhou Jiang Hebei Key Laboratory of Man-machine Environmental Thermal Control Technology and Equipment Hebei Center for Industrial Energy-saving and Pollution Control Research Hebei Vocational University of Technology and Engineering Xingtai 054000 China School of Mechanical Engineering and Institute of Advanced Machinery & Technology Sungkyunkwan University 2066 Seobu-ro Suwon 16419 South Korea School of Material Science and Engineering Key Laboratory of Green Chemical Engineering Process of Ministry of Education Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education Wuhan Institute of Technology Wuhan 430205 China

A meticulous design of the local environment at the interface between active species and the support, aimed at optimizing the adsorption of H 2 O molecules and BH 4 − anion, offers an ideal strategy for enhancing hydrogen generation via NaBH 4 hydrolysis through dual activation pathways. Theoretical predictions based on d-band center analysis and electron transfer calculations suggest that introducing -OH functional groups induce charge redistribution, enhancing charge concentration on alk-Ti 3 C 2 and facilitating the adsorption and activation of dual active species, H 2 O molecules and BH 4 − anion. Inspired by these predictions, the optimized alk-Ti 3 C 2 /RuO x catalyst demonstrates the highest catalytic activity, achieving a hydrogen generation rate (HGR) of 9468 mL min −1  g cat. −1 . Both experimental data and theoretical analyses confirm that the -OH functional groups promote charge enrichment on alk-Ti 3 C 2 , optimizing the adsorption of H 2 O molecules and BH 4 − anion, and reducing the dissociation energy barrier of the *OH H-TS intermediate. This dual activation pathways mechanism lowers the activation energy for NaBH 4 hydrolysis, significantly enhancing the HGR performance. These findings, guided by theoretical insights, establish alk-Ti 3 C 2 /RuO x as an efficient catalyst for NaBH 4 hydrolysis and provide a strong foundation for future hydrogen generation catalyst designs.

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Research progress on additive manufacturing technology and equipment for the vat polymerization of ceramic cores of aeroengine blades

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Additive Manufacturing Frontiers 2025年第2期4卷

作者： Yang, Haoqin Shan, Zhongde Wu, Runmou Yan, Dandan Shi, Jianpei Huang, Jian Shi, Haoming Dong, Shijie Fang, Xinliang Hu, Tianxiong College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 210016 China National Key Laboratory of Aerospace Structural Mechanics and Control Nanjing 210016 China Joint Laboratory of International Cooperation on Sustainable Manufacturing Ministry of Education Nanjing 210016 China College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 China Nanjing Yangtze River Industrial Technology Research Institute Co. Ltd. Nanjing 211500 China Department of Mechanical Engineering Tsinghua University Beijing 100084 China College of Mechanical Engineering University of Science and Technology Beijing Beijing 100083 China

As a key process in the manufacturing of hollow turbine blades for aeroengines, ceramic-core stereolithography (SL) is vital for the structural design and precise performance control of hollow turbine blades for aeroengines. Based on SL and digital light processing (DLP), ceramic SL has technical advantages such as high flexibility, short process flow, and integrated structure–performance manufacturing, making it ideal for manufacturing complex hollow ceramic cores. Currently, ceramic cores produced using this technology still encounter several challenges such as low bending strength, low dimensional accuracy, significant sintering shrinkage, and poor surface quality, which limit the innovative development and engineering applications of the additive manufacturing of UV-cured ceramics. This paper reviews the development of additive manufacturing technology and equipment for the vat polymerization of ceramic cores used in aeroengine blades and summarizes the principles and characteristics of vat polymerization for manufacturing ceramic cores. It also highlights research progress in lightweight structural design methods for ceramic cores, ceramic slurry preparation processes, SL processes, debinding and sintering processes, integration of forming system equipment, and verification of aeroengine blade casting. A comprehensive performance control strategy for the SL of ceramic cores is proposed, and future development directions and trends in ceramic-core fabrication using SL technology are discussed. © 2025 The Author(s)

关键词： Equipment integration Material system Property control Structure design Vat polymerization

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A combined computational-fluid-dynamics model and control strategies for perfusion bioreactor systems in tissue engineering

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IFAC-PapersOnLine 2021年第3期54卷 324-329页

作者： Ioana Nascu Daniel Sebastia-Saez Tao Chen Wenli Du Key Laboratory of Advanced Control and Optimization for Chemical Processes Ministry of Education East China University of Science and Technology Shanghai 200237 China Shanghai Institute of Intelligent Science and Technology Tongji University Shanghai 200092 China Department of Chemical and Process Engineering University of Surrey GU2 7XH Guildford United Kingdom

This work sets the foundations for the design of control algorithms to facilitate manufacturing of a cell growth process using a continuous perfusion bioreactor. The algorithms are designed to work with different types of cell cultures and deal with major disturbances that might appear in the process. Different types of control strategies are designed, implemented and tested. First, a comprehensive mathematical model of convection and diffusion in a perfusion bioreactor, combined with cell growth kinetics, is developed and implemented using Computational Fluid Dynamics. The model describes the spatio-temporal evolution of glucose concentration and cell density within a 3D polymeric scaffold. Since such a model is too complex to be used directly for control studies, a simplified version is used for the design of the controllers. Finally, the performances of the control strategies are validated against the original high-fidelity CFD model, thus closing the loop. The simulations show good performances and satisfactory behavior.

关键词： tissue engineering perfusion bioreactor CFD modeling PID

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Global Sensitivity Analysis for a perfusion bioreactor system in tissue engineering

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IFAC-PapersOnLine 2021年第15期54卷 550-555页

作者： Ioana Nascu Tao Chen Wenli Du Key Laboratory of Advanced Control and Optimization for Chemical Processes Ministry of Education East China University of Science and Technology Shanghai 200237 China Shanghai Institute of Intelligent Science and Technology Tongji University Shanghai 200092 China Department of Chemical and Process Engineering University of Surrey GU2 7XH Guildford United Kingdom

This work presents a global sensitivity analysis and simulations of a perfusion bioreactor process using the method of high-dimensional model representation (HDMR). This method was developed to express the input–output relationships of a complex model with a high dimensional input space. The comprehensive mathematical model of convection and diffusion in a perfusion bioreactor, combined with cell growth kinetics, is developed and implemented using Computational Fluid Dynamics (with the commercial software COMSOL Multiphysics v5.5). The model describes the spatio-temporal evolution of glucose concentration, oxygen concentration, lactate concentration and cell density within a 3D polymeric scaffold. A quantitative analysis of the complex kinetic mechanisms using recent development of advanced mathematical approaches to global sensitivity and uncertainty analysis through HDMR can be exploited to investigate the important features of the perfusion bioreactor process as well as possible factors underlying qualitative discrepancies.

关键词： tissue engineering perfusion bioreactor CFD modeling high-dimensional model representation global sensitivity analysis

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