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Latent-Enhanced Variational Adversarial Active Learning Assisted Soft Sensor

IEEE Sensors Journal 2023年第14期23卷 15762-15772页

作者： Dai, Yun Yang, Chao Liu, Yi Yao, Yuan Zhejiang University of Technology Institute of Process Equipment and Control Engineering Hangzhou310023 China Northeastern University State Key Laboratory of Synthetical Automation for Process Industries Shenyang110819 China National Tsing Hua University Department of Chemical Engineering Hsinchu300044 Taiwan

As the acquisition of variables that measure quality is typically challenging, labeled samples for building a model for soft sensors are often inadequate. Additionally, owing to the installation of redundant sensors, high-dimensional process data with strong correlations are acquired. Therefore, in this study, a sample selection strategy for active learning (AL), referred to as latent-enhanced variational adversarial AL (LVAAL), is developed to enhance quality prediction performance with limited labeled data. The LVAAL method uses a minimax game to explore the latent representation of the original data. Specifically, a latent-enhanced variational autoencoder (LEVAE) is used to deceive the adversarial network into predicting all samples, both labeled and unlabeled, as labeled. However, the adversarial network attempts to indicate the difference between latent representations. Subsequently, Gaussian process regression (GPR) is adopted as a base model for LVAAL. With the proposed LVAAL selection strategy, informative unlabeled samples are incrementally selected, thereby enhancing the prediction performance. The application results for a numerical case and an industrial example demonstrate the advantages of LVAAL compared with existing AL strategies. © 2001-2012 IEEE.

关键词： Gaussian distribution

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Recent Advances of Electrocatalysts and Electrodes for Direct Formic Acid Fuel Cells:from Nano to Meter Scale Challenges

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Nano-Micro Letters 2025年第6期17卷 482-531页

作者： Yang Li Ming-Shui Yao Yanping He Shangfeng Du School of Chemical Engineering University of BirminghamBirmingham B152TTUK Department of Chemical Engineering Loughborough UniversityLoughboroughLeicestershire LE113TUUK State Key Laboratory of Mesoscience and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190People’s Republic of China University of the Chinese Academy of Sciences Beijing 100049People’s Republic of China School of Chemical Engineering Kunming University of Science and TechnologyKunming 650504People’s Republic of China

Direct formic acid fuel cells are promising energy devices with advantages of low working temperature and high safety in fuel storage and *** have been expected to be a future power source for portable electronic *** technology has been developed rapidly to overcome the high cost and low power performance that hinder its practical application,which mainly originated from the slow reaction kinetics of the formic acid oxidation and complex mass transfer within the fuel cell ***,we provide a comprehensive review of the progress around this technology,in particular for addressing multiscale challenges from catalytic mechanism understanding at the atomic scale,to catalyst design at the nanoscale,electrode structure at the micro scale and design at the millimeter scale,and finally to device fabrication at the meter *** gap between the highly active electrocatalysts and the poor electrode performance in practical devices is ***,perspectives and opportunities are proposed to potentially bridge this gap for further development of this technology.

关键词： Direct formic acid fuel cell Electrocatalyst Electrode Formic acid oxidation Mass transfer

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Shape estimation for a TPU-based multi-material 3D printed soft pneumatic actuator using deep learning models

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Science China(Technological Sciences) 2024年第5期67卷 1470-1481页

作者： HU Yu TANG Wei QU Yang XU HuXiu KRAMARENKO Yu.Elena ZOU Jun State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou310058China School of Mechanical Engineering Zhejiang UniversityHangzhou310027China Institute of Process Equipment College of Energy EngineeringZhejiang UniversityHangzhou310027China Faculty of Physics Lomonosov Moscow State UniversityMoscow119991Russia Enikolopov Institute of Synthetic Polymeric Materials of Russian Academy of Sciences Moscow117393Russia

Real-time proprioception presents a significant challenge for soft robots due to their infinite degrees of freedom and intrinsic *** studies mostly focused on specific sensors and *** is still a lack of generalizable technologies for integrating soft sensing elements into soft actuators and mapping sensor signals to proprioception *** tackle this problem,we employed multi-material 3D printing technology to fabricate sensorized soft-bending actuators(SBAs)using plain and conductive thermoplastic polyurethane(TPU)*** designed various geometric shapes for the sensors and investigated their strain-resistive performance during *** address the nonlinear time-variant behavior of the sensors during dynamic modeling,we adopted a data-driven approach using different deep neural networks to learn the relationship between sensor signals and system states.A series of experiments in various actuation scenarios were conducted,and the results demonstrated the effectiveness of this *** sensing and shape prediction steps can run in real-time at a frequency of50 Hz on a consumer-level ***,a method is proposed to enhance the robustness of the learning models using data augmentation to handle unexpected sensor *** the methods are efficient,not only for in-plane 2D shape estimation but also for out-of-plane 3D shape *** aim of this study is to introduce a methodology for the proprioception of soft pneumatic actuators,including manufacturing and sensing modeling,that can be generalized to other soft robots.

关键词： shape estimation soft sensors and actuators 3D printing deep learning in robotics

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Hesperidin ameliorates H_(2)O_(2)-induced bovine mammary epithelial cell oxidative stress via the Nrf2 signaling pathway

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Journal of Animal Science and Biotechnology 2024年第4期15卷 1737-1750页

作者： Qi Huang Jiashuo Liu Can Peng Xuefeng Han Zhiliang Tan CAS Key Laboratory for Agro‑Ecological Processes in Subtropical Region National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry ProductionHunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic ProcessInstitute of Subtropical AgricultureChinese Academy of SciencesChangsha 410125HunanChina State Key Laboratory of Animal Nutrition and Feeding Institute of Animal SciencesChinese Academy of Agricultural SciencesBeijing 100193China

Background Hesperidin is a citrus flavonoid with anti-inflammatory and antioxidant potential. However, its protective effects on bovine mammary epithelial cells(b MECs) exposed to oxidative stress have not been *** In this study, we investigated the effects of hesperidin on H_(2)O_(2)-induced oxidative stress in b MECs and the underlying molecular mechanism. We found that hesperidin attenuated H_(2)O_(2)-induced cell damage by reducing reactive oxygen species(ROS) and malondialdehyde(MDA) levels, increasing catalase(CAT) activity, and improving cell proliferation and mitochondrial membrane potential. Moreover, hesperidin activated the Keap1/Nrf2/ARE signaling pathway by inducing the nuclear translocation of Nrf2 and the expression of its downstream genes NQO1 and HO-1, which are antioxidant enzymes involved in ROS scavenging and cellular redox balance. The protective effects of hesperidin were blocked by the Nrf2 inhibitor ML385, indicating that they were Nrf2 *** Our results suggest that hesperidin could protect b MECs from oxidative stress injury by activating the Nrf2 signaling pathway, suggesting that hesperidin as a natural antioxidant has positive potential as a feed additive or plant drug to promote the health benefits of bovine mammary.

关键词： Bovine mammary epithelial cell Hesperidin Nrf2 signaling pathway Oxidative stress

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The potential of ionic liquids in biopharmaceutical engineering

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Chinese Journal of Chemical engineering 2021年第2期34卷 236-243页

作者： Xuan Lin Zhiguo Su Yanli Yang Songping Zhang State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China

Biopharmaceuticals,such as proteins,peptides,nucleic acids and vaccines,bring about great hopes for the prevention and treatment of various diseases,but the industrialization of these products still faces challenges such as structural instability,inefficient bioactivity and low *** liquids(ILs),the marvelous solvent media with inimitable and tunable properties,may provide alternative solutions to overcome the above problems of biopharmaceutical *** has gradually been made through studies by combination of ILs with *** applications involved the stabilization,protection,and delivery of *** trends are being forwarded to using ILs in vaccines and nucleic acid ***,challenges remain on the toxicity and safety ***,the cost of adding ILs to the benefits of biopharmaceuticals need to be considered.

关键词： Ionic liquids Biopharmaceutical engineering Biomacromolecules Stabilization Vaccine Delivery

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Sustainable and untethered soft robots created using printable and recyclable ferromagnetic fibers

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Bio-Design and Manufacturing 2024年第6期7卷 926-937页

作者： Wei Tang Yidan Gao Zeyu Dong Dong Han Vadim V.Gorodov Elena Y.Kramarenko Jun Zou State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310058China School of Mechanical Engineering Zhejiang UniversityHangzhou 310058China Institute of Process Equipment College of Energy EngineeringZhejiang UniversityHangzhou 310027China Faculty of Physics Lomonosov Moscow State UniversityMoscow 119991Russia Enikolopov Institute of Synthetic Polymeric Materials of Russian Academy of Sciences Moscow 117393Russia

Integrated printing of magnetic soft robots with complex structures using recyclable materials to achieve sustainability of the soft robots remains a persistent ***,we propose a kind of ferromagnetic fibers that can be used to print soft robots with complex *** ferromagnetic fibers are recyclable and can make soft robots *** ferromagnetic fibers based on thermoplastic polyurethane(TPU)/NdFeB hybrid particles are extruded by an *** use a desktop three-dimensional(3D)printer to demonstrate the feasibility of printing two-dimensional(2D)and complex 3D soft *** printed soft robots can be recycled and reprinted into new robots once their tasks are ***,these robots show almost no difference in actuation capability compared to prior versions and have new *** applications include lifting,grasping,and moving objects,and these functions can be operated untethered *** addition,the locomotion of the magnetic soft robot in a human stomach model shows the prospect of medical ***,these fully recyclable ferromagnetic fibers pave the way for printing and reprinting sustainable soft robots while also effectively reducing e-waste and robotics waste materials,which is important for resource conservation and environmental protection.

关键词： Ferromagnetic fibers Sustainable soft robots Three-dimensional printing Recyclable soft materials Medical applications

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Dual Perspective Secure Analysis for Local Estimate-Based FDI Attacks in Networked Systems

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IEEE Transactions on Systems, Man, and Cybernetics: Systems 2025年第5期55卷 3312-3325页

作者： Qu, Fuyi Liu, Hao Tan, Cheng Li, Yuzhe Shenyang Ligong University School of Automation and Electrical Engineering Shenyang110159 China Northeastern University State Key Laboratory of Synthetical Automation for Process Industries Shenyang110819 China Wuhan Institute of Technology School of Electrical and Information Engineering Wuhan430205 China Qufu Normal University School of Engineering Rizhao276800 China

This article discusses the security concerns related to networked systems, where the sensor sends the local estimate to the remote estimator, which may be attacked. Traditionally, in the remote state estimation with the innovation or raw measurement case, denial of service (DoS) and false data injection (FDI) attacks are investigated thoroughly. Notably, for remote state estimation with local estimate cases considered in this article, most existing works consider DoS attacks but not FDI attacks, negatively affecting remote state estimation performance. Furthermore, current detection mechanisms encounter challenges when identifying such attacks due to the unavailable innovation or raw measurement. As such, we study FDI attacks under this framework and provide the corresponding secure analysis using a dual-perspective approach. Specifically, we propose a detector to detect such attacks using the prior information extracted from the remote estimator. Then, we analyze the existence of stealthy attacks and characterize the corresponding performance evaluation for the remote estimation under such attacks. Following this, we construct the optimal attack scheme, maximizing the expected average and terminal estimation error covariances, respectively. To reduce the above vulnerability, we develop a co-design transmission strategy and offer an analytical detection performance evaluation under different attack scenarios. Finally, simulations are provided to illustrate the proposed results. © 2025 IEEE.

关键词： Detectors state estimation Technological innovation Security Current measurement Communication system security Wireless networks Kalman filters Hands Estimation error

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Self-assembly of nanoparticles at solid-liquid interface for electrochemical capacitors

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Rare Metals 2022年第11期41卷 3591-3611页

作者： Xue Li Chen Chen Qian Niu Nian-Wu Li Le Yu Bao Wang State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China StateKey Lab of Organic-Inorganic Composites Beijing UniversityofChemicalTechnologyBeijing100029China

Self-assembly of nanoparticles at solid-liquid interface could be promising to realize the assembled functions for various applications,such as rechargeable batteries,supercapacitors,and *** review summarizes the self-assembly of the nanoparticles at solid-liquid interface according to the different driving forces of assembly,including hydrophilic-hydrophobic interactions,solvophobic and electrostatic *** be specific,the self-assembly can be divided into the following two types:surfactant-assisted self-assembly and direct self-assembly of Janus particles(inorganic and amphiphilic copolymer-inorganic Janus nanoparticles).Using the emulsion stabilized by nanoparticles as the template,the self-assembly constructed by the interaction of the nanostructure unit(including metal,metal oxide,and semiconductor,etc.)not only possesses the characteristic of nanostructure unit,but also exhibits the excellent assembly performance in electrochemistry *** application of these assemblies in the area of electrochemical capacitors is ***,the current research progress and perspectives toward the self-assembly of nanoparticles at stabilized solid-liquid interface are proposed.

关键词： Self-assembly Solid-liquid interface Driving force Electrochemical capacitors

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Hierarchically microporous membranes for highly energy-efficient gas separations

Industrial Chemistry & Materials

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Industrial Chemistry & Materials 2023年第3期1卷 376-387页

作者： Shuangjiang Luo Tianliang Han Can Wang Ying Sun Hongjun Zhang Ruilan Guo Suojiang Zhang CAS Key Laboratory of Green Process and Engineering State Key Laboratory of Multiphase Complex SystemsBeijing Key Laboratory of Ionic Liquids Clean ProcessInstitute of Process EngineeringChinese Academy of Sciences(CAS)Beijing 100190China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Department of Chemical and Biomolecular Engineering University of Notre DameNotre DameIN 46556USA Longzihu New Energy Laboratory Zhengzhou 450000China Henan University Jinming RoadKaifeng475004China

The implementation of synthetic polymer membranes in gas separations,ranging from natural gas sweetening,hydrogen separation,helium recovery,carbon capture,oxygen/nitrogen enrichment,etc.,has stimulated the vigorous development of high-performance membrane ***,size-sieving types of synthetic polymer membranes are frequently subject to a trade-off between permeability and selectivity,primarily due to the lack of ability to boost fractional free volume while simultaneously controlling the micropore size ***,we review recent research progress on microporosity manipulation in high-free-volume polymeric gas separation membranes and their gas separation performance,with an emphasis on membranes with hourglass-shaped or bimodally distributed ***-of-the-art strategies to construct tailorable and hierarchically microporous structures,microporosity characterization,and microcavity architecture that govern gas separation performance are systematically summarized.

关键词： Gas separation membranes Hierarchical microporosity Micropore size distribution Configurational free volume Solution-diffusion mechanism

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Exploration on the stability conditions in bubble columns by noncooperative game theory

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Chinese Journal of Chemical engineering 2022年第10期50卷 75-84页

作者： Jiachen Liu Xiaoping Guan Ning Yang State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China

The energy-minimization multiscale(EMMS)model,originally proposed for gas-solid fluidization,features a stability condition to close the simplified conservation *** was put forward to physically reflect the compromise of two dominant mechanisms,i.e.,the particle-dominated with minimal potential energy of particles,and the gas-dominated with the least resistance for gas to penetrate through the particle *** stability condition was then formulated as the minimization of the ratio of these two physical ***,the EMMS approach was later extended to the gas-liquid flow in bubble columns,termed dual-bubble-size *** considers the compromise of two dominant mechanisms,i.e.,the liquid-dominated regime with small bubbles,and the gas-dominated regime with large *** stability condition was then formulated as the minimization of the sum of these two physical ***,the two stability conditions were expressed in different manner,though gas-solid and gas-liquid systems bear some *** addition,both the conditions transform the original multiobjective variational problem into a single-objective *** mathematical formulation of stability condition remains therefore an open *** study utilizes noncooperative game theory and noninferior solutions to directly solve the multi-objective variational problem,aiming to explo re the different pathways of compromise of dominant *** results show that only keeping the single dominant mechanism cannot capture the jump change of gas holdup,which is associated with flow regime *** of dominant mechanisms,noninferior solutions and noncooperative game theory can predict the flow regime ***,the game between the two mechanisms makes the two-bubble structure degenerate and reduce to the single-bubble *** game of the three mechanisms restores the two-bubble *** exploration on the formulation of stability conditions may

关键词： Bubble column Flow regimes Mesoscale Noncooperative gametheory

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