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Synergistic Sulfur-Selenium Cathodes for Lithium-Sulfur Batteries

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SSRN 2023年

作者： Wei, Shanyue Qi, Fangfang Que, Lanfang Yu, Fuda Wang, Jiangli Hu, Ting Chen, Jing Chen, Yanxin Lu, Canzhong Xie, Yiming Engineering Research Center of Environment-Friendly Function Materials Ministry of Education Institute of Materials Physical Chemistry Huaqiao University Xiamen361021 China Xiamen Institute of Rare Earth Materials Haixi Institutes Chinese Academy of Sciences Xiamen361021 China CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fujian Province Fuzhou China School of Materials Science and Engineering Jiangxi University of Science and Technology Ganzhou341000 China

Lithium-sulfur batteries are promising for next-generation energy storage but face challenges such as polysulfideshuttle effect, slow kinetics and lithium dendrite growth. Here we report a two-dimensional defective carbon-based material with sulfur and selenium co-loaded as a synergistic cathode. The cathode exhibits high initial capacity of 1450 mAh/g at 0.1 C and low capacity decay rates of 0.09% and 0.13% for 500 cycles and 300 cycles at 0.5 C and 2 C, respectively. X-ray photoelectron spectroscopy (XPS) and Density functional theory calculations (DFT) show that there is a strong adsorption effect between sulfur, selenium and the substrate material, which can inhibit the generation of shuttle effects. Our work provides a scalable and viable strategy for long-term lithium storage applications. © 2023, The Authors. All rights reserved.

关键词： Cathodes

TOPIC: A Parallel Association Paradigm for Multi-Object Tracking under Complex Motions and Diverse Scenes

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arXiv

arXiv 2023年

作者： Cao, Xiaoyan Zheng, Yiyao Yao, Yao Qin, Huapeng Cao, Xiaoyu Guo, Shihui Key Laboratory for Urban Habitat Environmental Science and Technology School of Environment and Energy Peking University Shenzhen Graduate School Guangdong Shenzhen China Quanzhou University of Information Engineering Fujian Quanzhou China Tsinghua-Berkeley Shenzhen Institute Tsinghua University Guangdong Shenzhen China College of Chemistry and Chemical Engineering School of Informatics Xiamen University Fujian Xiamen China

Video data and algorithms have been driving advances in multi-object tracking (MOT). While existing MOT datasets focus on occlusion and appearance similarity, complex motion patterns are widespread yet overlooked. To address this issue, we introduce a new dataset called BEE24 to highlight complex motions. Identity association algorithms have long been the focus of MOT research. Existing trackers can be categorized into two association paradigms: single-feature paradigm (based on either motion or appearance feature) and serial paradigm (one feature serves as secondary while the other is primary). However, these paradigms are incapable of fully utilizing different features. In this paper, we propose a parallel paradigm and present the Two rOund Parallel matchIng meChanism (TOPIC) to implement it. The TOPIC leverages both motion and appearance features and can adaptively select the preferable one as the assignment metric based on motion level. Moreover, we provide an Attention-based Appearance Reconstruction Module (AARM) to reconstruct appearance feature embeddings, thus enhancing the representation of appearance features. Comprehensive experiments show that our approach achieves state-of-the-art performance on four public datasets and BEE24. Moreover, BEE24 challenges existing trackers to track multiple similar-appearing small objects with complex motions over long periods, which is critical in real-world applications such as beekeeping and drone swarm surveillance. Notably, our proposed parallel paradigm surpasses the performance of existing association paradigms by a large margin, e.g., reducing false negatives by 6% to 81% compared to the single-feature association paradigm. The introduced dataset and association paradigm in this work offer a fresh perspective for advancing the MOT field. The source code and dataset are available at https://***/holmescao/TOPICTrack. Copyright © 2023, The Authors. All rights reserved.

关键词： Object tracking

Data-Driven Dynamic Event-Triggered Sliding-Mode Heading Control for Unmanned Surface Vehicles with Uncertainties

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Data-Driven Dynamic Event-Triggered Sliding-Mode Heading Con...

IEEE International Conference on Systems, Man and Cybernetics

作者： Huarong Zhao Jinjun Shan Xing Li Hongnian Yu School of Internet of Things Engineering Jiangnan University Wuxi P. R. China Department of Earth and Space Science and Engineering York University Toronto ON Canada School of Electrical Engineering and Intelligentization Dong-guan University of Technology Dongguan P. R. China State Key Laboratory of Synthetical Automation for Process Industries Northeastern University Shenyang Liaoning P. R. China School of Computing Engineering and the Built Environment Edinburgh Napier University Edinburgh UK

ISBN: (数字)9781665410205

ISBN: (纸本)9781665410212

This paper investigates a data-driven dynamic event-triggered sliding mode heading control problem for un-manned surface vehicles with uncertain dynamics models. First, a virtual sensor is introduced to establish a compact dynamic linearization model for the unmanned surface vehicle. Then, a dynamic event-triggered scheme is developed to alleviate the communication burden. Moreover, a sliding mode surface is designed, and a data-driven dynamic event-triggered sliding mode heading control approach is formulated. Finally, rigorous mathematical proofs are given, and several simulations demon-strate the effectiveness and superiority of the proposed method compared to existing approaches.

关键词： Uncertainty Event detection Soft sensors Delay effects Mathematical models Data models Steady-state Vehicle dynamics Autonomous vehicles Cybernetics

Recent advances on electroactive CNT-based membranes for environmental applications:The perfect match of electrochemistry and membrane separation

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Chinese Chemical Letters 2020年第10期31卷 2539-2548页

作者： Yanbiao Liu Fuqiang Liu Ning Ding Xuemei Hu Chensi Shen Fang Li Manhong Huang Zhiwei Wang Wolfgang Sand Chong-Chen Wang Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection College of Environmental Science and EngineeringDonghua UniversityShanghai 201620China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry Beijing Technology and Business UniversityBeijing 100048China State Key Laboratory of Pollution Control and Resource Reuse School of Environmental Science and EngineeringTongji UniversityShanghai 200092China Institute of Biosciences Freiberg University of Mining and TechnologyFreiberg 09599Germany Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation Beijing University of Civil Engineering and ArchitectureBeijing 100044China

Global climate change,growing population,and environmental pollution underscore the need for a greater focus on providing advanced water treatment *** electrochemical basedprocesses are becoming promising solutions,they still face challenges owing to mass transport and upscaling which hinder the exploitation of this *** design and reactor configuration are key factors for achieving operational *** electroactive membrane has proven to be a breakthrough technology integrating electrochemistry and membrane separation with an enhanced mass transport by *** this review article,we discuss recent progress in environmental applications of electroactive membranes with particular focus on those composed of carbon nanotubes(CNT)due to their intriguing physicochemical prope *** applications in degradation of refractory contaminants,detoxification and sequestration of toxic heavy metal ions,and membrane fouling alleviations are systematically *** then discuss the existing limitations and opportunities for future *** development of advanced electroactive systems depends on interdisciplinary collaborations in the areas of materials,electrochemistry,membrane development,and environmental sciences.

关键词： Electroactive membranes Carbon nanotubes Organic pollutants Heavy mental ions Antifouling

Analysis on Adversarial Robustness of Deep Learning Model LeNet-5 Based on Data Perturbation

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Analysis on Adversarial Robustness of Deep Learning Model Le...

International Conference on Dependable Systems and Their Applications (DSA)

作者： Yudi Liu Minyan Lu Di Peng Jie Wang Jun Ai The Key Laboratory on Reliability and Environment Engineering Technology School of Reliability and Systems Engineering Beihang University Beijing China China Institute of Marine Technology & Economy Beijing China

ISBN: (数字)9780738124223

ISBN: (纸本)9781665419536

At present, deep learning technology is widely used in daily life. From recommendation algorithms to autonomous driving, deep learning models play an important role. However, once these models face perturbation, especially in case of adversarial attack perturbation, depending on the situation, the wrong output of the model may cause adverse consequences, such as property damage or personal safety accidents. Therefore, the ability of the model to resist the perturbation of adversarial attacks, that is, adversarial robustness, remains as a problem worthy of attention. In the present study, a deep learning model based on the convolutional neural network LeNet-5 was used as the experimental object, and adversarial examples are formed by adversarial attacks on the input data of the model, in order to observe the changing law of the adversarial robustness of the deep learning model.

关键词： Deep learning Analytical models Perturbation methods Training data Data models Robustness Safety

Enhanced Formation of Iodinated Trihalomethanes in a Mixed Chlorine/Chloramine System and Attenuation by Uv-Activated Process

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SSRN 2022年

作者： Liu, Zhi Lin, Yi-Li Zhang, Tian-Yang Hu, Chen-Yan Zheng, Zheng-Xiong Tang, Yu-Lin Cao, Tong-Cheng Xu, Bin Gao, Nai-Yun State Key Laboratory of Pollution Control and Resource Reuse Key Laboratory of Yangtze Water Environment Ministry of Education College of Environmental Science and Engineering Tongji University Shanghai200092 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China Department of Safety Health and Environmental Engineering National Kaohsiung University of Science and Technology Kaohsiung 824 Taiwan College of Environmental and Chemical Engineering Shanghai University of Electric Power Shanghai200090 China School of Chemical Science and Engineering Key Laboratory of Road and Traffic Engineering of Ministry of Education Tongji University Shanghai200092 China

Iodinated trihalomethanes (I-THMs) have drawn increasing concerns due to their higher toxicity than that of their chlorinated and brominated analogues. In this study, I-THM formation was firstly evaluated for three treatment scenarios - (i) chlorine alone, (ii) chloramine alone, and (iii) mixed chlorine/chloramine - in the presence and absence of UV irradiation for the iodide-containing humic acid solution or natural water. The results indicated that I-THM formation decreased in the order of mixed chlorination/chloramination > chloramination >> chlorination, which fitted the trend of toxicity evaluation results using Chinese hamster ovary cells. Conversely, total organic halide concentration decreased in the order of chlorination >> chloramination ≈ mixed chlorination/chloramination. Besides, I-THM formation can be efficiently controlled in a UV-activated mixed chlorine/chloramine system. Influencing factors including pH value and Br-/I- molar ratio were also systematically investigated in a mixed chlorine/chloramine system. Enhanced I-THM formation was observed with increasing pH value (6.0 to 8.0) and Br-/I- molar ratio (1 : 1 to 10 : 1). The results obtained in this study can provide new insights into the increasing risk of I-THM formation in a mixed chlorine/chloramine system and the effective control of I-THMs in the iodide-containing water using UV irradiation. © 2022, The Authors. All rights reserved.

关键词： Irradiation

Performance Optimization of Novel Multi-Unit Green Wall System for Blackwater Treatment and in Situ Reuse

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SSRN 2023年

作者： Wang, Zhiquan Shi, Fan Fan, Chunzhen Wu, Suqing Kong, Hainan Zhao, Min Zhang, Yejian Zheng, Xiangyong College of Life and Environmental Science Wenzhou University Zhejiang Wenzhou325035 China State & Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution Zhejiang Wenzhou325035 China Key Laboratory of Zhejiang Province for Water Environment and Marine Biological Resources Protection Zhejiang Wenzhou325035 China School of Environmental Science and Engineering Shanghai Jiao Tong University Shanghai200240 China

Blackwater constitutes a primary component of environmental pollution posing serious risk to human health;however, reusing the nutrients found in blackwater diminishes the associated pollution and promotes resource recycling. To achieve a cost-effective and eco-friendly in situ treatment of blackwater with high organic load, we designed and optimized a novel multi-unit green-wall system. At the start-up stage, various pollutants were rapidly reduced, primarily due to the adsorption effect of the zeolite carriers, while the concentration of the pollutants decreased as the number of treatment units increased. The multi-unit green-wall system, when combined with several treatment units, can effectively improve the removal efficiency of pollutants in higher-concentration blackwater. Overall, the green-wall system was more effective in removing chemical oxygen demand (COD) and ammonia (NH4+-N) because of the good buffering capacity of the media and the roles of Firmicutes and Bacteroidetes in COD degradation and ammoniated nitrification reactions. Consequently, the novel multi-unit green-wall system is an effective method for in situ blackwater reuse. © 2023, The Authors. All rights reserved.

关键词： Chemical oxygen demand

Fabrication of Z-Scheme WO3/KNbO3 Photocatalyst with Enhanced Separation of Charge Carriers

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Chemical Research in Chinese Universities 2020年第5期36卷 901-907页

作者： ZHENG Xiuzhen HAN Huijuan YE Xiangju MENG Sugang ZHAO Shuangshuang WANG Xiangxiang CHEN Shifu College of Chemistry and Materials Science Huaibei Notmal UniversityHuaihei 235000P.R.China State Key Laboratory of Photocatalysis on Energy and Environment Fuzhou UniversityFuzhou 350116P.R.China College of Chemistry and Material Engineering Anhui Science and Technology UniversityFengyang 233100P.R.China

Z-Schemc photocatalysts as a research locus pertomi strong redox capability and high photocatalytic ***3/KNbO3 photocatalysts were fabricated by ball milling method,and performed higlier photocatalytic activity in liquid degradation(rhodamine B,methylene blue and bisphenol A),compared with WO3 or KNbO3 *** is due to that Z-scheme heterojunction is lonned between WO3 and KNbO3,and the holes photo-excited in valence band of KNbO?are quickly combined with the electrons in conduction band of *** electrons accumulated in conduction band of KNbO3 show high reducibility,thereby reducing O2 to·O 2-,and the holes in valence band of WO3 show high oxidative to oxidize H2O to·OH,***,it is proved by means of electron spin resonaiice(ESR)spectra,terephthalic acid photolumiiiescence probing technique(TA・PL),and UV-Vis absorption spectra of nitroblue *** work indicates that the iabrication of Z-scheme structure can improve the photocatalytic activity by efficiently separating the photogenerated electrons and holes in the photocatalytic reaction system,which is helpful to deeply understand the migration mechanism of photoexcited cairier(band-band transfer and Z-scheme transfer)in heterojunction photocatalysts.

关键词： WO3/KNbO3- Z-Scheme Photogenerated electron and hole Photocatalytic degradation Active species

Nitrated and Oxygenated Polycyclic Aromatic Hydrocarbons Emissions from Solid Fuel Combustion in Rural China: Database of 12 Real-World Scenarios for Residential Cooking and Heating Activities

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SSRN 2022年

作者： Wang, Jinze Du, Wei Chen, Yuanchen Lei, Yali Chen, Long Shen, Guofeng Pan, Bo Tao, Shu Yunnan Provincial Key Laboratory of Soil Carbon Sequestration and Pollution Control Faculty of Environmental Science & Engineering Kunming University of Science &Technology Kunming650500 China Laboratory of Earth Surface Processes College of Urban and Environmental Sciences Peking University Beijing100871 China College of Environment Research Centre of Environmental Science Zhejiang University of Technology Hangzhou310032 China Key Laboratory of Geographic Information Science The Ministry of Education School of Geographic Sciences East China Normal University Shanghai200241 China

Polycyclic aromatic hydrocarbon (PAH) derivatives such as oxygenated PAHs (oPAHs) and nitrated PAHs (nPAHs), are receiving raising concerns due to their high toxic potential. Incomplete solid fuel combustion can release large quantities of PAHs derivatives, especially in low-efficiency domestic stoves, while rare studies focused on the emission characteristics of PAH derivatives, especially based on field measurements. In this study, field measurements were conducted in rural Chinese homes to determine emissions of nPAHs and oPAHs from solid fuel combustion. A total of 12 fuel-stove combinations including cooking and space heating activities were investigated. Emission factors (EFs) of total nPAHs and oPAHs were in the range of 1.0 – 682.1 µg/kg and 0.01 – 131.7 mg/kg, respectively, with arithmetic means and stand deviations of 53.5 ± 72.5 µg/kg and 13.9 ± 24.4 mg/kg, respectively. The nPAHs and oPAHs EFs for coal combustion (including honeycomb briquette, coal chunk and peat tested in this study) are 30.2 ± 28.1 µg/kg and 1.5 ± 2.9 mg/kg, respectively, much lower than that for biomass burning ( p © 2022, The Authors. All rights reserved.

关键词： Polycyclic aromatic hydrocarbons