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Pressure swing adsorption process modeling using physics-informed machine learning with transfer learning and labeled data

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Green chemical engineering 2025年第2期6卷 233-248页

作者： Zhiqiang Wu Yunquan Chen Bingjian Zhang Jingzheng Ren Qinglin Chen Huan Wang Chang He School of Materials Science and Engineering Sun Yat-Sen UniversityGuangzhou510275China Guangdong Engineering Center for Petrochemical Energy Conservation Guangzhou510275China Department of Industrial and Systems Engineering The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina School of Chemical Engineering and Technology Sun Yat-sen UniversityZhuhai519082China State Key Laboratory of Heavy Oil Processing China University of Petroleum-BeijingBeijing102249China CNNC No.7 Research and Design Institute Co.Ltd. Taiyuan030012China

Pressure swing adsorption(PSA)modeling remains a challenging task since it exhibits strong dynamic and cyclic *** study presents a systematic physics-informed machine learning method that integrates transfer learning and labeled data to construct a spatiotemporal model of the PSA *** approximate the latent solutions of partial differential equations(PDEs)in the specific steps of pressurization,adsorption,heavy reflux,counter-current depressurization,and light reflux,the system's network representation is decomposed into five lightweight *** this basis,we propose a parameter-based transfer learning(TL)combined with domain decomposition to address the long-term integration of periodic PDEs and expedite the network training ***,to tackle challenges related to sharp adsorption fronts,our method allows for the inclusion of a specified amount of labeled data at the boundaries and/or within the system in the loss *** results show that the proposed method closely matches the outcomes achieved through the conventional numerical method,effectively simulating all steps and cyclic behavior within the PSA processes.

关键词： Physics-informed machine learning Pressure swing adsorption Transfer learning Labeled data Partial differential equations

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Humidity Sensing Elements Based on Silica-Graphene Surface Layers 15

Humidity Sensing Elements Based on Silica-Graphene Surface L...

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15th International Scientific and Practical Conference on Environment. Technology. Resources, ETR 2024

作者： Nedev, Nedyu Nenova, Zvezditza Kozhukharov, Stephan Ivanov, Stefan Nenov, Toshko Fundamentals of Electrical and Power Engineering Technical University of Gabrovo Gabrovo Bulgaria LAMAR Laboratory for Advanced Materials Research University of Chemical Technology and Metallurgy Sofia Bulgaria Automation Information and Control Systems Technical University of Gabrovo Gabrovo Bulgaria

ISBN: (纸本)9781713899570

The paper presents humidity sensing elements based on silica-graphene surface layers, prepared via a sol-gel method. The samples were sintered at temperatures of 400 °C, 600 °C and 800 °C. Tetraethoxysilane was used as a precursor of SiO2 and as a dopant - graphene aggregates of nanoplatelets. A description of the sample preparation procedure is provided. Using a precise impedance analyzer and a calibrator for humidity and temperature, the changes in their resistance R were investigated with variations in relative humidity in the range of 30% to 90% at a temperature of 25 °C and at a frequency of 20 Hz. Morphological observations and map data analyses were carried out by Scanning Electron Microscopy (SEM) and Energy Dispersion Spectroscopy (EDX). The developed sensor elements have a good sensitivity to the humidity, and the resistance change reaches two orders of magnitude. Additions of graphene improve the sensitivity of the elements. The characteristics of the sensing elements at different sintering temperatures and different amounts of graphene dopant were modeled using an artificial neural network. © 2024 Nedyu Nedev, Zvezditza Nenova, Stephan Kozhukharov, Stefan Ivanov, Toshko Nenov.

关键词： Silica

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Macrophage metabolism reprogramming EGCG-Cu coordination capsules delivered in polyzwitterionic hydrogel for burn wound healing and regeneration

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Bioactive Materials 2023年第11期29卷 251-264页

作者： Qinghua Li Huijuan Song Shuangyang Li Pengbo Hu Chuangnian Zhang Ju Zhang Zujian Feng Deling Kong Weiwei Wang Pingsheng Huang Tianjin Key Laboratory of Biomaterial Research Institute of Biomedical EngineeringChinese Academy of Medical Sciences and Peking Union Medical CollegeTianjin300192China Institute of Radiation Medicine Chinese Academy of Medical Sciences and Peking Union Medical CollegeTianjin300192China Department of Polymer Science and Engineering Key Laboratory of Systems BioengineeringSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin300072China Emergency Department of Binzhou Medical University Hospital BinzhouShandong Province256600China State Key Laboratory of Medicinal Chemical Biology College of Life SciencesNankai UniversityTianjin300071China

Excessive reactive oxygen species(ROS)at severe burn injury sites may promote metabolic reprogramming of macrophages to induce a deteriorative and uncontrolled inflammation cycle,leading to delayed wound healing and ***,a novel bioactive,anti-fouling,flexible polyzwitterionic hydrogel encapsulated with epigallocatechin gallate(EGCG)-copper(Cu)capsules(termed as EGCG-Cu@CBgel)is engineered for burn wound management,which is dedicated to synergistically exerting ROS-scavenging,immune metabolic regulation and pro-angiogenic ***-Cu@CBgel can scavenge ROS to normalize intracellular redox homeostasis,effectively relieving oxidative damages and blocking proinflammatory signal ***,EGCG-Cu can inhibit the activity of hexokinase and phosphofructokinase,alleviate accumulation of pyruvate and convert it to acetyl coenzyme A(CoA),whereby inhibits glycolysis and normalizes tricarboxylic acid(TCA)***,metabolic reprogramming of macrophages by EGCG-Cu downregulates M1-type polarization and the expression of proinflammatory cytokines both in vitro and in ***,copper ions(Cu^(2+))released from the hydrogel facilitate ***-Cu@CBgel significantly accelerates the healing of severe burn wound via promoting wound closure,weakening tissue-damaging inflammatory responses and enhancing the remodeling of pathological ***,this study demonstrates the great potential of bioactive hydrogel dressing in treating burn wounds without unnecessary secondary damage to newly formed skin,and highlights the importance of immunometabolism modulation in tissue repair and regeneration.

关键词： ROS scavenging Hydrogel dressing EGCG-Cu capsule Metabolic reprogramming Burn wound healing

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Catalytic urea hydrolysis by composite metal oxide catalyst towards efficient urea-based SCR process:performance evaluation and mechanism investigation

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Frontiers of Environmental Science & engineering 2023年第5期17卷 67-80页

作者： Yuchen Li Zhen Chen Xiangyu Zhang Kun Yang Lidong Wang Junhua Li MOE Key Laboratory of Resources and Environmental Systems Optimization Department of Environmental Science and EngineeringNorth China Electric Power UniversityBeijing 102206China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Xi’an Thermal Power Research Institute Co. Xi’an 710032China

As a promising option to provide gaseous NH_(3) for SCR system,catalytic urea hydrolysis has aroused great attention,and improving surface area and activity of catalysis are the crucial issues to be solved for efficient urea ***,a composite metal oxide(TiO_(2)@Al_(2)O_(3))catalyst was prepared by a simple hydrothermal method,with mesoporous alumina(γ-Al_(2)O_(3))as *** results verify the mesoporous structure and submicron cluster of TiO_(2)@Al_(2)O_(3),with exposed crystal faces of(101)and(400)for TiO_(2)andγ-Al_(2)O_(3),*** electronegativity difference of Ti4+and Al3+changes the charge distribution scheme around the interface,which provides abundant acid/base sites to boost the urea ***,for an optimal proportioning with nano TiO_(2)content at 10 wt.%,the hydrolysis efficiency can reach up to 35.2%at 100℃ in 2 h,increasing by~7.1%than that of the blank experiment.^(13)C NMR spectrum measurements provide the impossible intermediate species during urea *** calculations are performed to clarify the efficient H_(2)O decomposition at the interface of TiO_(2)@Al_(2)O_(3).The result offers a favorable technology for energy-efficiency urea hydrolysis.

关键词： SCR Urea hydrolysis Catalytic Water dissociation Electronegativity

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Synergistic effect between Er-doped MoS_(2)nanosheets and interfacial Mo-N coupling phases for enhanced electrocatalytic hydrogen evolution

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Rare Metals 2024年第3期43卷 1301-1308页

作者： Nian-Peng Li Lei Zhang Hua Zhang Fan-Fei Min Lei Wang Sam Toan Xi-Jun Liu Guang-Zhi Hu State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines School of Materials Science and EngineeringAnhui University of Science and TechnologyHuainan232001China Donghai Laboratory Zhoushan316021China Department of Chemical Engineering University of Minnesota-DuluthDuluthMN55812USA School of Ecology and Environmental Science Institute for Ecological Research and Pollution Control of Plateau LakesYunnan UniversityKunming650504China MOE Key Laboratory of New Processing Technology for Non-Ferrous Metals and Materials Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured MaterialsGuangxi UniversityNanning530004China

Hydrogen production via electrochemical water splitting is a promising and green *** one of the most representative transition metal sulfides layered materials,Molybdenum disulfide(MoS_(2))has immense potential for the hydrogen evolution reaction(HER).We successfully prepared a nitrogen-doped carbon(NC)in situ-grown erbium-doped MoS_(2)polyhedral structure(Er-MoS_(2)/NC)that incorporates an interfacial Mo-N coupling phase.

关键词： hydrogen interfacial coupling

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Development of a Universal RNA Dual-Terminal Labeling Method for Sensing RNA-Ligand Interactions

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CCS Chemistry 2023年第1期5卷 221-233页

作者： Longhuai Cheng Dejun Ma Jie Zhang Xueying Kang Yang Wu Yi Zhao Long Yi Zhen Xi State Key Laboratory of Elemento-Organic Chemistry Department of Chemical BiologyCollege of ChemistryNational Pesticide Engineering Research CenterCollaborative Innovation Center of Chemical Science and EngineeringNankai UniversityTianjin 300071 State Key Laboratory of Organic-Inorganic Composites and Beijing Key Laboratory of Bioprocess Beijing University of Chemical Technology(BUCT)Beijing 100029 Key Laboratory of Intelligent Information Processing Research Center for Ubiquitous Computing SystemsInstitute of Computing TechnologyChinese Academy of SciencesBeijing 100190

Dual labeling of an RNA can provide Förster resonance energy transfer(FRET)sensors for studying RNA folding,miRNA maturation,and RNA-protein ***,we report the development of a highly efficient strategy for direct dual-terminal labeling of any RNA of *** explored new Michael cycloaddition for facile labeling of 5′-terminal RNA with improved *** chemical tetrazinylation of RNA at the 3′-terminus was achieved with the highly efficient and catalysis-free tetrazine-cycloalkyne *** single-terminal labeling methods were combined for dual-terminal labeling of an RNA including short hairpin RNA,pre-miRNA,riboswitch,and noncoding ***,these dual-labeled RNA-based FRET sensors were used to monitor RNA-ligand interactions in vitro and in live *** is anticipated that these universal RNA labeling strategies will be useful to study RNA structures and functions.

关键词： dual labeling Förster resonance energy transfer sensor Michael cycloaddition tetrazinecycloalkyne ligation RNA-ligand interaction

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Dynamic asymmetric mechanical responsive carbon nanotube fiber for ionic logic gate

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Chinese chemical Letters 2024年第6期35卷 249-253页

作者： Pei Cao Yilan Wang Lejian Yu Miao Wang Liming Zhao Xu Hou State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) Xiamen 361005China The Higher Educational Key Laboratory for Biomedical Engineering of Fujian Province Department of BiomaterialsResearch Center of Biomedical Engineering of XiamenCollege of MaterialsXiamen UniversityXiamen 361005China Key Laboratory of Multifunctional Nanomaterials and Smart Systems Advanced Materials DivisionSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China Institute of Artificial Intelligence Xiamen UniversityXiamen 361005China Department of Physics Research Institute for Biomimetics and Soft MatterFujian Provincial Key Laboratory for Soft Functional Materials ResearchJiujiang Research InstituteCollege of Physical Science and TechnologyXiamen UniversityXiamen 361005China Engineering Research Center of Electrochemical Technologies of Ministry of Education Xiamen UniversityXiamen 361005China

Inspired by biological ion channels,numerous artificial asymmetric ion channels have been synthesized to facilitate the fabrication of ionic ***,the creation of biomimetic asymmetric ion channels necessitates expensive scientific apparatus and intricate material processing procedures,which constrains its advancement within the realm of ionic *** this study,we have devised dynamic asymmetric ion channels with mechanical responsiveness by combining polymers of varying elastic modulus along the longitudinal axis of carbon nanotube fiber(CNTF).The ion rectification can be modulated via the disparate response of CNTF-based ion channels to mechanical *** have effectively employed these asymmetric ion channels with mechanical sensitivity in the design of a logic gate device,achieving logic operations such as“AND”and“OR”.The conception of these dynamic asymmetric ion channels with mechanical sensitivity offers a straightforward,cost-effective,and versatile approach for generating ion channels,highlighting their potential application in intricate,highly integrated ionic circuits.

关键词： Carbon nanotubes fibers Mechanical response Rectification effect Ionic logic gate

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A master-slave generalized predictive synchronization control for preheating process of multi-cavity hot runner system

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Chinese Journal of chemical engineering 2023年第10期62卷 270-280页

作者： Hongyi Qu Shengyong Mo Ke Yao Zhao-Xia Huang Zhihao Xu Furong Gao Institute of Intelligent Manufacturing Guangdong Academy of SciencesGuangdong Key Laboratory of Modern Control TechnologyGuangzhou 510070China Fok Ying Tung Graduate School The Hong Kong University of Science and TechnologyGuangzhou 511442China Department of Chemical and Biological Engineering The Hong Kong University of Science and TechnologyHong Kong 999077China National Engineering Research Center of Novel Equipment for Polymer Processing Department of Mechanical and Automotive EngineeringSouth China University of TechnologyGuangzhou 510641China

As a key component of injection molding,multi-cavity hot runner(MCHR)system faces the crucial problem of polymer melt filling imbalance among the *** thermal imbalance in the system has been considered as the leading ***,the solution may rest with the synchronization of those heating processes in MCHR *** paper proposes a’Master-Slave’generalized predictive synchronization control(MS-GPSC)method with’***’strategy for preheating stage of MCHR *** core of the proposed method is choosing the heating process with slowest dynamics as the’Master’to track the setpoint,while the other heating processes are treated as‘Slaves’tracking the output of’Master’.This proposed method is shown to have the good ability of temperature *** corresponding analysis is conducted on parameters tuning and stability,simulations and experiments show the strategy is effective.

关键词： Process control Thermodynamics process Model-predictive control Multi-cavity hot runner system Master-Slave synchronization Mr.Slowest

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Emerging natural hemp seed proteins and their functions for nutraceutical applications

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Food Science and Human Wellness 2023年第4期12卷 929-941页

作者： Haihong Chen Bing Xu Yi Wang Wei Li Dong He Yan Zhang Xizhen Zhang Xinhui Xing Institute of Biopharmaceutical and Health Engineering Tsinghua Shenzhen International Graduate SchoolShenzhen 518055China Institute of Biomedical Health Technology and Engineering Shenzhen Bay LaboratoryShenzhen 440300China Key Laboratory for Industrial Biocatalysis Ministry of EducationInstitute of Biochemical EngineeringDepartment of Chemical EngineeringTsinghua UniversityBeijing 100084China School of Chemical Engineering and Energy Technology Engineering Research Center of Health Food Design&Nutrition RegulationKey Laboratory of Healthy Food Development and Nutrition Regulation of China National Light IndustryDongguan University of TechnologyDongguan 523808China Hebei Food Inspection and Research Institute Shijiazhuang 050091China College of life Science and Technology Guangxi UniversityNanning 530004China Center for Synthetic and Systems Biology Tsinghua UniversityBeijing 100084China

With changing dietary habits and increasing awareness of the nutraceutical role of dietary foods,the demand for natural plant proteins and interest in non-traditional protein sources in the food industry are *** hemp,belonging to the plant family Cannabaceae,is cultivated for its fibre and edible *** to its nutritional value,it has also been used in the food industry and *** particular,hemp seed proteins have drawn considerable attention in both scientific and industrial fields because of their excellent nutraceutical values,superior digestibility,low allergenicity and diverse techno-functional *** this review,we provide a summary of the current research progress on the extraction and purification processes,physiochemical properties,nutraceutical functions,and applications of hemp seed *** in the application of advanced technologies for hemp seed bioactive peptide mining are also *** review provides up-to-date insights into the nutraceutical values,health benefits,and future applications of this emerging plant source protein.

关键词： Hemp seed protein Extraction Purification Physicochemical properties Nutraceutical functions Food industry

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Performance Recovery in Event-Triggered State Feedback control

Performance Recovery in Event-Triggered State Feedback Contr...

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2023 IEEE Conference on control Technology and Applications, CCTA 2023

作者： Kurtoglu, Deniz Yucelen, Tansel Tran, Dzung Casbeer, David Garcia, Eloy University of South Florida Laboratory for Autonomy Control Information and Systems Graduate Student of the Department of Mechanical Engineering TampaFL33620 United States University of South Florida Laboratory for Autonomy Control Information and Systems Department of Mechanical Engineering TampaFL33620 United States Wright-Patterson Air Force Base Air Force Research Laboratory Control Science Center OH45433 United States

ISBN: (纸本)9798350335446

The idea behind event-triggered control theory is to aperiodically schedule control data transmissions between an embedded processor and a physical system based on event rules. While this theory can effectively reduce control data transmissions, the resulting closed-loop system performance can significantly deviate from its ideal (i.e., non-event-triggered) closed-loop system performance. Furthermore, the selection of the parameters of the event rules can be a challenge in obtaining a satisfactory closed-loop system performance that stays close to its ideal one. Motivated by this standpoint, the contribution of this paper is to make the first attempt in rigorously addressing this problem, where we propose a corrective signal for recovering the ideal closed-loop system performance in event-triggered control. The key feature of the proposed corrective signal is that the closed-loop system performance approaches its ideal one in a quantifiable manner as the gain of this corrective signal is increased. System-theoretical analysis of the proposed method is presented and illustrative numerical examples are also given to demonstrate the efficacy of our contribution. © 2023 IEEE.

关键词： Closed loop systems

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