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Special issue on electrochemical conversion and utilization of hydrogen energy

Frontiers in Energy 2024年第3期18卷 263-264页

作者： Yun ZHENG Bo YU Xiaogang FU Jiujun ZHANG Institute of New Energy Materials and Engineering School of Materials Science and EngineeringFuzhou UniversityFuzhou 350108China State Key Laboratory of Solidification Processing Atomic Control&Catalysis Engineering LaboratorySchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Institute of Nuclear and New Energy Technology Tsinghua UniversityBeijing 100084China

The concerns over energy crisis and climate change caused by the excessive consumption of fossil fuels and the associated emission of greenhouse gases, have driven many countries to develop policies for an energy transition into zero-carbon energy sources, essentially aiming at decarbonizing their energy systems. Among various renewable sources, hydrogen has been hailed as an ideal alternative to provide secure, cost-effective, and non-polluting energy. In recent years, there has been noteworthy progress in hydrogen electrochemical conversion and utilization techniques and devices, including water electrolyzers, proton-exchange membrane fuel cells (PEMFCs), solid oxide fuel cells (SOFCs), etc. Each of these technologies has yielded a series of encouraging advances. To showcase these recent advances, Frontiers in Energy is launching a special issue titled “electrochemical conversion and utilization of hydrogen energy”.

关键词： hydrogen energy. electrochemical

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Partial Information Defense Game with an Active Target 1

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7th Chinese Conference on Swarm Intelligence and Cooperative control, CCSICC 2023

作者： He, Qiyong Li, Xiuxian Meng, Min Liu, Shuai Department of Control Science and Engineering College of Electronics and Information Engineering and the Shanghai Research Institute for Intelligent Autonomous Systems Tongji University Shanghai201800 China School of Control Science and Engineering Shandong University Jinan250061 China

ISBN: (数字)9789819733248

ISBN: (纸本)9789819733231

This paper studies the partial information defense game with an active target. This type of game considers the influence of both sensing limitation and the moving target, which are common in the real-world conditions. Compared with the stationary target scenario, the defender has more flexibility to capture the intruder when the target is active. Inspired by previous works, we separate the game into four phases and obtain optimal strategies for all agents in each phase, respectively. The lower bound of defender’s winning probability is obtained under some mild assumptions, which is higher than that in the stationary target scenario. An illustrative example is presented to demonstrate the efficacy of the theoretical results. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： active target partial information pursuit-evasion game

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Elevation,bedrock exposure,land use,interbedded limestone and clastic rock,and vegetation coverage dominate the spatiotemporal variability of soil erosion in karst basin

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Journal of Mountain science 2023年第9期20卷 2519-2535页

作者： CHEN Mei GAO Jia-yong CHEN Hong-lian JING Jun LI Rui School of Karst Science Guizhou Normal UniversityGuiyang 550001China State Engineering Technology Institute for Karst Desertification Control Guiyang 550001China

Soil erosion is a prominent environmental problem in karst *** the spatiotemporal variability of soil erosion and the factors that influence soil erosion is of great significance for regional soil erosion prevention and ***,the mechanisms influencing the characteristic features of the karst basins,such as bedrock exposure and lithology,still need to be further *** study used GIS technology,the Revised Universal Soil Loss Equation model,Getis–Ord Gi*,and partial least squares regression(PLSR)to identify the dominant factors influencing soil erosion and the spatiotemporal variability of soil erosion in 31 sub-basins of the Dabang River Basin(DRB),a typical karst area of Southwest China,from 2010 to *** results indicated that soil erosion in the DRB from 2010 to 2020 was generally decreasing,the mean soil erosion in the DRB in 2010,2015 and 2020 was 18.46,16.51 and 15.29 t ha^(-1)a^(-1),*** the study period,the area of slight erosion increased by 26.39%(706.54 km^(2)),while severe erosion enlarged by 26.36 km^(2).Spatially,the DRB was primarily affected by medium and slight soil *** hot spot areas of soil erosion(key control areas)were mainly concentrated in the central and southern parts of the basin,decreasing each year,and the area of soil erosion hot pots has decreased from 43.22%to 20.60%.PLSR decoupling results show that elevation,bedrock exposure,land use type,interbedded limestone and clastic rock,and vegetation coverage were identified as the key variables affecting soil erosion,explaining 52.8%of soil erosion variability,with a high value of the Variable Importance on Projection(VIP)more than *** results can be used as a reference for comprehensive control of soil erosion and water loss in the basin.

关键词： Soil erosion Karst basin RUSLE model Spatiotemporal variability PLSR

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Distributed formation control of multiple aerial vehicles based on guidance route

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Chinese Journal of Aeronautics 2023年第3期36卷 368-381页

作者： Jinyong CHEN Rui ZHOU Guibin SUN Qingwei LI Ning ZHANG School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China Science and Technology on Information Systems Engineering Laboratory Nanjing 210007China AVIC Xi’an Flight Automatic Control Research Institute Xi’an 710076China

Formation control of fixed-wing aerial vehicles is an important yet rarely addressed problem because of their complex dynamics and various motion constraints,such as nonholonomic and velocity *** guidance-route-based strategy has been demonstrated to be applicable to fixed-wing ***,it requires a global coordinator and there exists control lag,due to its own *** this reason,this paper presents a fully distributed guidance-route-based formation approach to address the aforementioned ***,a hop-count scheme is introduced to achieve distributed implementation,in which each aircraft chooses a neighbor with the minimum hop-count as a reference to generate its guidance route using only local ***,the model predictive control algorithm is employed to eliminate the control lag and achieve precise formation shape *** addition,the stall protection and collision avoidance are also ***,three numerical simulations demonstrate that our proposed approach can implement precise formation shape control of fixed-wing aircraft in a fully distributed manner.

关键词： Formation shape control Fixed-wing aircraft Guidance route Hop-count estimation Model predictive control

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A Multimodal Approach Using Both Raw EEG Features and Spectrograms for Sedation Monitoring 14

A Multimodal Approach Using Both Raw EEG Features and Spectr...

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14th IEEE International Conference on Cyber Technology in Automation, control, and Intelligent Systems, CYBER 2024

作者： Zhang, Ke Wang, Zhelong Li, Zhenglin Zang, Shiguo Li, Da Zhang, Mingzhe Su, Yongjie School of Control Science and Engineering Dalian University of Technology Dalian116024 China School of Control Science and Engineering Dalian University of Technology Liaoning Dalian China Central Hospital of Dalian University of Technology Department EICU Dalian China

ISBN: (纸本)9798331506056

In clinical settings, sedative medications are frequently used for critically ill patients to relieve pain and aid in the delivery of medical care. Achieving precise control over a patient's sedation status is essential when using these medications. However, monitoring sedation levels in critically ill patients receiving sedatives can be challenging. Inappropriate use of sedation may lead to either over-sedation or under-sedation. Long-term or excessive sedation can have detrimental effects, including prolonged mechanical ventilation, increased medical costs, extended stays in the intensive care unit, and cognitive impairment. Conversely, inadequate sedation may result in anxiety, agitation, and pain. Various scales, indices, and other assessment methods exist to classify and evaluate sedation levels in patients. However, these approaches often suffer from poor objectivity and inefficiency. To enhance clinical sedation assessment, we propose leveraging continuous electroencephalogram (EEG) data for evaluating patients' sedation status. In this study, we compare the performance of multiple models and signal feature extraction methods within the EEG signal processing framework. Based on our findings, we present an optimized EEG-based model for assessing patient sedation states. Our goal is to develop a scoring system that assists clinicians in determining personalized sedative and anesthetic dosages accurately in the intensive care unit. © 2024 IEEE.

关键词： Electroencephalography

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Inhibiting liquid permeation into silicone rubber by superhydrophobic coating for prolonged service life

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High Voltage 2023年第5期8卷 986-996页

作者： Shuming Liu Ying Zhou Zhou Zuo Shuqi Liu Qian Wang Zhong Chen Xidong Liang State Key Laboratory of Control and Simulation of Power System and Generation Equipment Department of Electrical EngineeringTsinghua UniversityBeijingChina School of Material Science and Engineering Nanyang Technological UniversitySingaporeSingapore

Liquid permeation into silicone rubber(SR)may lead to the degradation or complete failure of the composite *** to inhibit liquid permeation,two kinds of superhydrophobic coatings are applied to the SR *** liquid permeation properties of SR with different types of liquids are investigated,and the Langmuir diffusion model is applied to analyse the experimental *** results show that the composite superhydrophobic coating can effectively inhibit liquid permeation by reducing the contact area between the surface and liquid,and the stable structure of the composite coating can maintain the performance after the liquid permeation and ***,the nano‐particle coating without the polymer binder experiences severe performance degradation during the immersion test,and it cannot restrain the liquid permeation anymore after it loses the *** a validation of the effective protection,the insulation resistivity change was *** resistivity decreases sharply for the pristine SR after water permeation;however,the decrease is much smaller for the coated *** current study not only provides new insight into the liquid permeation properties of SR with different surface wettability but also suggests an effective measure to prevent liquid permeation into SR.

关键词： coating permeation liquid

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Enhanced metronidazole removal by binary-species photoelectrogenic biofilm of microaglae and anoxygenic phototrophic bacteria

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Journal of Environmental sciences 2022年第5期34卷 25-36页

作者： Xubin Zhang Jian Sun Mengmeng Zhao Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control Guangdong Key Laboratory of Environmental Catalysis and Health Risk ControlSchool of Environmental Science and EngineeringInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China

High efficient removal of antibiotics during nutriments recovery for biomass production poses a major technical challenge for photosynthetic microbial biofilm-based wastewater treatment since antibiotics are always co-exist with nutriments in wastewater and resist biodegradation due to their strong biotoxicity and *** this study,we make a first attempt to enhance metronidazole(MNZ)removal from wastewater using electrochemistry-activated binary-species photosynthetic biofilm of Rhodopseudomonas Palustris(***)and Chlorella vulgaris(***)by cultivating them under different applied *** results showed that application of external potentials of-0.3,0 and 0.2 V led to 11,33 and 26-fold acceleration in MNZ removal,respectively,as compared to that of potential *** extent of enhancement in MNZ removal was positively correlated to the intensities of photosynthetic current produced under different externally applied *** binary-species photoelectrogenic biofilm exhibited 18 and 6-fold higher MNZ removal rate than that of single-species of *** and ***,respectively,due to the enhanced metabolic interaction between *** of an external potential of 0V significantly promoted the accumulation of tryptophan and tyrosine-like compounds as well as humic acid in ex-tracellular polymeric substance,whose concentrations were 7.4,7.1 and 2.0-fold higher than those produced at potential free,contributing to accelerated adsorption and reductive and photosensitive degradation of MNZ.

关键词： Photoelectrogenic biofilm Microalgae Anoxygenic phototrophic bacteria Photosynthetic current Antibiotic

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SKINC-NET: an efficient Lightweight Deep Learning Model for Multiclass skin lesion classification in dermoscopic images

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Multimedia Tools and Applications 2025年第13期84卷 12531-12557页

作者： Asif, Sohaib Qurrat-ul-Ain Khan, Saif Ur Rehman Amjad, Kamran Awais, Muhammad School of Computer Science and Engineering Central South University Hunan Changsha China School of Public Health Central South University Hunan Changsha China School of Control Science and Engineering Central South University Hunan Changsha China School of Minerals Processing and Bioengineering Central South University Hunan Changsha China

Diagnosing skin cancer through visual image examinations is time-consuming and error-prone, as the similar appearance and variations within each type of skin cancer challenge the efficiency and accuracy. Computer-aided techniques, notably convolutional neural networks (CNNs), demand substantial computational resources and exhibit a high level of time complexity, rendering them impractical for real-world applications necessitating rapid and precise skin cancer detection. To address this issue, this research introduces SKINC-NET, a streamlined deep learning (DL) model specifically designed to achieve precise diagnoses of various skin cancer types while minimizing computational resource requirements. SKINC-NET can classify seven types of skin lesions using dermoscopic images, designed with dense layers, batch normalization (BN), and LeakyReLU activation functions. Numerous experiments were conducted on the HAM10000 dataset, using a data augmentation approach to tackle the class imbalance problem. The study compared the SKINC-NET model’s performance with four transfer learning models, namely ResNet50, VGG16, MobileNetV2, and EfficientNetB0. Several ablation studies were conducted to identify the optimal hyperparameters that lead to precise skin cancer diagnosis. The SKINC-NET model demonstrates its superiority by achieving the highest overall classification accuracy of 98.54% with minimal computation. The experimental findings affirm that the SKINC-NET model showcases remarkable robustness and presents several significant benefits, including lower computational complexity, a smaller number of trainable parameters, and superior performance compared to existing state-of-the-art models. SKINC-NET can assist dermatologists in making appropriate decisions regarding the early detection of skin cancer. © The Author(s), under exclusive licence to Springer science+Business Media, LLC, part of Springer Nature 2024.

关键词： Convolutional neural networks

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Experimental study on effects of gas flow rate on soot characteristics in diffusion flames coupled with plasma

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science China(Technological sciences) 2024年第2期67卷 475-485页

作者： QI DanDan CHEN MingXiao TU Xin LIU Dong MIIT Key Laboratory of Thermal Control of Electronic Equipment School of Energy and Power EngineeringNanjing University of Science and TechnologyNanjing 210094China Advanced Combustion Laboratory School of Energy and Power EngineeringNanjing University of Science and TechnologyNanjing 210094China Department of Electrical Engineering and Electronics University of LiverpoolLiverpool L693GJUK

This study examined the evolution of morphology and nanostructure of soot particles from the plasma-flame interaction for various gas flow *** current study used both optical diagnostic and sampling methods to explore the soot production and combustion *** particles were characterized at the same positions downstream from the flame zone by thermophoretic sampling and transmission electron ***,X-ray diffraction analysis,and thermogravimetric analysis were performed to study the nanostructure and oxidation reactivity of soot.A reduction in soot concentration was found with the plasma addition,which illustrated an inhibition effect of plasma on soot *** increased gas flow rate promoted soot concentration since a growing number of carbons participated in the combustion *** on the gas flow rate(carbon content)variation and plasma activation,either liquid-like soot material with irregularly shaped protrusions or chain-like structure,or a mixture of both,were generated from the diffusion *** soot produced by plasma-flame interaction also demonstrated a high correlation between nanostructure and *** soot from lower carbon content with plasma activation had a shorter fringe length and larger fringe tortuosity related to higher oxidation *** the contrary,soot from the highest carbon content without plasma-flame interaction exhibited prevalent fullerene-like nanostructures with evident large or small shells and also had a higher carbonization degree resulting in lower oxidation reactivity.

关键词： soot characteristics gas flow rate plasma diffusion flames

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Investigation on the Performance of the Pump-Free Double Heat Source Ejector Refrigeration System with R1234yf

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Journal of Thermal science 2022年第5期31卷 1452-1464页

作者： YU Meihong ZHAO Hongxia WANG Xinli HAN Jitian LAI Yanhua School of Energy and Power Engineering Shandong UniversityJi’nan250061China School of Control Science and Engineering Shandong UniversityJi’nan250061China

A pump is needed in an ejector refrigeration system,which makes the system high cost and complicated and hinders its application.A pump-free double heat source ejector refrigeration system using R1234yf as working fluid is proposed in which an injector driven by another heat source replaces the liquid circulating pump,making the system more affordable,simpler and more *** effect of different operation conditions on entrainment ratios and the influence of different factors on system performance are analyzed on the basis of mass,momentum and energy conservation *** influence degree of each factor on system performance is investigated by the orthogonal test *** condenser temperature has the largest effect on system *** pressure drop in the suction chamber of gas-liquid injector has the least impact on system *** COP can reach about 0.35 under a certain working *** system can be driven by two different temperature heat sources with no electricity needed,and it is a good choice for places with abundant heat resources or lack of electricity.

关键词： ejector refrigeration system injector entrainment ratio coefficient of performance(COP)

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