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SSRN 2023年

作者： Zheng, Shengmeng Deng, Shaohong Ma, Chong Xia, Yinhang Qiao, Hang Zhao, Jun Gao, Wei Tu, Qiang Zhang, Youming Rui, Yichao Wu, Jinshui Su, Yirong Chen, Xiangbi Key Laboratory of Agro-ecological Processes in Subtropical Region Institute of Subtropical Agriculture the Chinese Academy of Sciences Changsha410125 China Department of Ecological and Resources Engineering Fujian Key Laboratory of Eco-industrial Green Technology Wuyi University Wuyishan354300 China College of Resources and Environmental Sciences Hunan Agricultural University Changsha410128 China Fort Lauderdale Research and Education Center Department of Microbiology and Cell Science University of Florida DavieFL33314 United States State Key Laboratory of Microbial Technology Shandong University Qingdao266327 China Department of Agronomy Purdue University West LafayetteIN47907 United States

Conventional aerobic methanotrophs oxidize methane (CH4) and covert CH4-derived carbon (C) into biomass at the oxic-anoxic interface of inundated rice paddy fields, playing indispensable role in mitigating greenhouse gas emissions and loss of organic C from methanogenesis. Two phylogenetically distinct groups of methanotrophs, type I (γ-proteobacteria) and type II (α-proteobacteria) methanotrophs, often co-exist in rice paddy soil and compete for CH4 biotransformation. Since these two methanotrophic groups also possess differential kinetics of CH4 oxidation and pathways of C assimilation, the consequence of their competition in soil is expected to affect the CH4 oxidation rate and C conversion efficiency. Here, we examined the microbiology, chemistry and CH4 metabolism in 24 geographically different paddy soils, covering 4 climate zones of eastern China. High-throughput sequencing of pmoA gene displayed a clear separation of in situ methanotrophic compositions between temperate (warm and mid-temperate) and warmer (subtropics and tropics) climate zones, likely driven by soil pH. Both methanotrophic groups were detected in soils but proportions of type I methanotrophs increased in temperate soils of higher pH. Microcosm incubation with 13CH4 resulted in 13C-PLFAs synthesis primarily (63.1%–93.4%) from type I methanotrophs in all soils, reflecting their dominant contribution to CH4 assimilation. Particularly, temperate soils with increased proportions of type I methanotrophs showed higher CH4 oxidation rate and C conversion efficiency. Collectively, this study depicts a continental-scale disparity of methanotrophic dynamics that tightly associates with consequence of competitional status of different types of methanotrophs, and highlights the importance of microbiological control to maximize the rate and efficiency of methanotrophy. © 2023, The Authors. All rights reserved.

关键词： Soils

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Consequence of Competition between Type I and Ii Methanotrophs Determines Methane Oxidation and Assimilation in Rice Paddy Fields

SSRN

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SSRN 2023年

作者： Zheng, Shengmeng Deng, Shaohong Ma, Chong Xia, Yinhang Qiao, Hang Zhao, Jun Gao, Wei Tu, Qiang Zhang, Youming Rui, Yichao Wu, Jinshui Su, Yirong Chen, Xiangbi Key Laboratory of Agro-ecological Processes in Subtropical Region Institute of Subtropical Agriculture The Chinese Academy of Sciences Changsha410125 China Department of Ecological and Resources Engineering Fujian Key Laboratory of Eco-industrial Green Technology Wuyi University Wuyishan354300 China College of Resources and Environmental Sciences Hunan Agricultural University Changsha410128 China Fort Lauderdale Research and Education Center Department of Microbiology and Cell Science University of Florida DavieFL33314 United States State Key Laboratory of Microbial Technology Shandong University Qingdao266327 China Department of Agronomy Purdue University West LafayetteIN47907 United States

关键词： Soils

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Consequence of Competition between Type I and Ii Methanotrophs Determines Methane Oxidation and Assimilation in Rice Paddy Fields

SSRN

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SSRN 2023年

关键词： Soils

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Analyzing Characteristic and Modeling of High-Temperature Proton Exchange Membrane Fuel Cells with Co Poisoning Effect

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SSRN 2023年

作者： Lei, Gang Zheng, Hualin Zhang, Jun Chin, Cheng Siong Xu, Xinhai Zhou, Weijiang Zhang, Caizhi School of Mechatronic Engineering Southwest Petroleum University Chengdu610500 China College of Mechanical and Vehicle Engineering The State Key Laboratory of Mechanical Transmissions Chongqing Automotive Collaborative Innovation Centre Chongqing University Chongqing400044 China School of Mechanical Engineering Zhejiang University Hangzhou310027 China Faculty of Science Agriculture and Engineering Newcastle University in Singapore 599493 Singapore School of Mechanical Engineering and Automation Harbin Institute of Technology Guangdong Shenzhen China Sinocat Environmental Technology Co Ltd Chengdu Hi-tech Industrial Development Zone Chengdu611731 China

High-temperature proton exchange membrane fuel cells (HT-PEMFC) have strong resistance to CO poisoning. However, the published CO poisoning models for HT-PEMFC are based on the finite element analysis method, which are difficult to use for the performance prediction and development of system control strategy due to a large amount of calculation. In the beginning, a semi-empirical model of HT-PEMFC is deduced based on the analysis of the CO poisoning characteristics. Then the key parameters of ohmic impedance and concentration polarization advance correction factor are obtained by fitting the polarization curves, dissociation and adsorption activation energy of H2 and CO are obtained by the calculation, respectively. The slope of the straight line segment in the ohmic polarization interval of the polarization curve is linearly related to ln[H2/CO]. The change of limiting current density is the main factor for the advance of concentration polarization. The fitted ohmic impedance varies with temperature and CO concentration, but changes little above 175 oC. CO coverage depends primarily on dissociation and adsorption activation energy of CO. Subsequently, the proposed model is validated with experimental data and shows high similarity. The model can be used for studying the systematic control strategy development and performance monitoring of HT-PEMFC. © 2023, The Authors. All rights reserved.

关键词： Dissociation

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Automated detection of complex construction scenes using a lightweight transformer-based method

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Automation in Construction 2025年 177卷

作者： Hongru Xiao Bin Yang Yujie Lu Wenshuo Chen Songning Lai Biaoli Gao College of Civil Engineering Tongji University Shanghai China Key Laboratory of Performance Evolution and Control for Engineering Structures of Ministry of Education Tongji University Shanghai 200092 China Hong Kong University of Science and Technology (Guangzhou) Guangzhou China

Accurate and real-time object detection in complex construction scenes from multiple viewpoints plays a crucial role in effective project management. However, this task remains limited by boundary information sharing and scene sensitivity inherent in deep features. To investigate the deep features in construction scenes and analyze method performance, SODA and VisDrone datasets, mean Average Precision (mAP) series metrics, visual inspection, Grad-CAM, and ablation studies are utilized. This paper proposes a lightweight Transformer-based detection framework named Complex Construction Scenes Transformer (CCS-TR), which integrates with a Scale-Isolate Fusion Attention (SIFA) mechanism and an Instructive Contrastive Learning (ICL) strategy. Evaluation results demonstrate that CCS-TR achieves a 5.1 %–8.8 % improvement in detection accuracy while maintaining lower computational costs, making it suitable for real-time on-site detection. Future work will address detection in interacting complex scenes and develop multi-modal collaboration strategies for extreme lighting.

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Towards ISAC-Empowered Vehicular Networks: Framework, Advances, and Opportunities

arXiv

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arXiv 2023年

作者： Du, Zhen Liu, Fan Li, Yunxin Yuan, Weijie Cui, Yuanhao Zhang, Zenghui Masouros, Christos Ai, Bo School of Electronic and Information Engineering Nanjing University of Information Science and Technology Nanjing210044 China Department of Electronic and Electrical Engineering Southern University of Science and Technology Shenzhen518055 China School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing100876 China School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai200240 China Department of Electronic and Electrical Engineering University College London LondonWC1E 7JE United Kingdom State Key Lab of Rail Traffic Control and Safety Beijing Jiaotong University Beijing100044 China

Connected and autonomous vehicle (CAV) networks face several challenges, such as low throughput, high latency, and poor localization accuracy. These challenges severely impede the implementation of CAV networks for immersive metaverse applications and driving safety in future 6G wireless networks. To alleviate these issues, integrated sensing and communications (ISAC) is envisioned as a game-changing technology for future CAV networks. This article presents a comprehensive overview on the application of ISAC techniques in vehicle-to-infrastructure (V2I) networks. We cover the general system framework, representative advances, and a detailed case study on using the 5G New Radio (NR) waveform for sensing-assisted communications in V2I networks. Finally, we highlight open problems and opportunities in the field. Copyright © 2023, The Authors. All rights reserved.

关键词： 5G mobile communication systems

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Corrigendum of “Effect of structure parameters on thermal performance of novel punched V-shape VGs for hear exchangers: An experimental approach” [ICHMT 155 (2024) 107472]

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International Communications in Heat and Mass Transfer 2025年 161卷

作者： Jiangbo Wang Liangcai Zeng Yuting He Bing Zhao Peng Chu Key Laboratory of Metallurgical Equipment and Control Technology (Wuhan University of Science and Technology) Ministry of Education & Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering (Wuhan University of Science and Technology) Wuhan 430081 People's Republic of China Key Laboratory of Coal Conversion and New Carbon Materials of Hubei Province School of Chemistry and Chemical Engineering College of Life and Health Sciences； Wuhan University of Science and Technology Wuhan 430081 People's Republic of China

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Promoted Generation of Singlet Oxygen by Hollow-Shell Cos/G-C3n4 Catalyst for Sulfonamides Degradation: Pms Oxidation and Electron Transfer

SSRN

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SSRN 2022年

作者： Fang, Zhimo Qi, Juanjuan Xu, Yongyi Liu, Yibo Qi, Tieyue Xing, Lei Dai, Qin Wang, Lidong MOE Key Laboratory of Resources and Environmental Systems Optimization College of Environmental Science and Engineering North China Electric Power University Beijing102206 China Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control Department of Environmental Science and Engineering North China Electric Power University Baoding071003 China China Power Hua Chuang Electricity Technology Research Company Ltd Suzhou215123 China

Sulfanilamide (SM), as one representative drug of sulfonamides, was commonly used for the prevention and treatment of bacterial infectious diseases and were extremely difficult to remove. Herein, an efficient catalyst (CoS/CN) for SM degradation was constructed by CoS self-assembling on ultra-thin g-C3N4 nanosheets. The prepared hollow-shell CoS/CN catalyst could completely degrade SM within 10 min with a rate constant (1.959 min−1) through activation of peroxymonosulfate (PMS). Experiments and theoretical calculations illustrated that that S2- acted as an electron donor to promote the generation of Co(II). The addition of g-C3N4 made the CoS/CN composite had higher conductivity and electron transfer ability than CoS, which promoted the decomposition of PMS to produce reactive oxygen species (ROSs). Singlet oxygen (1O3) was proved as the primary ROSs, and SO4•− radicals were generated during the degradation process to improve the low mineralization rate of 1O2-dominated degradation process, which derived from the oxidation process of PMS and electron transfer of g-C3N4. The results revealed the synergistic effect of free radicals and non-free radicals during the oxidation and reduction of PMS, and provided theoretical support for the efficient degradation of refractory organics in wastewater. © 2022, The Authors. All rights reserved.

关键词： Sulfur compounds

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An Anomaly Detection Model for ADS-B Systems Based on Improved GAN and LSTM Networks

An Anomaly Detection Model for ADS-B Systems Based on Improv...

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International Conference on Communication technology (ICCT)

作者： Xinying Guo Chunhua Zhu Jing Yang Yan Xiao Key Laboratory of Grain Information Processing and Control Henan University of Technology Zhengzhou China Ministry of Education College of Information Science and Engineering Henan University of Technology Zhengzhou China Zhengzhou Locaris Technology Co. LTD Zhengzhou China

ISBN: (纸本)9781665432078

Automatic Dependent Surveillance-Broadcast (ADS-B) is an important part of the next generation air transportation systems, but its protocol does not provide relevant authentication and data encryption, so it is extremely vulnerable to various spoofing attacks. Therefore, it is necessary to develop a set of ADS-B data anomaly detection models. According to the strong temporal dependence and fast update rate of ADS-B data, we initiatively introduce a novel anomaly detection model based on Improved Generative Adversarial Network and long short-term memory networks (IGAN-LSTM). In the model, IGAN mainly improves the generator $G$ architecture of GAN through upgrading the commonly used encoder architecture to encoder-decoder-encoder architecture, which captures the training data distribution within both data space and latent space. IGAN then utilizes encoding losses based on latent spatial features to determine whether a data sample is anomalous or not. At the same time, to model ADS-B data with the temporal dependence, we use the LSTM networks as the main architecture of the model, which is able to make use of long-term temporal dependence and avoid the vanishing gradient problem during training. Experimental results show that the proposed model has a higher area under the receiver operating characteristic curve and the precision recall curve than the other baseline methods from the literature, and reveal that the model has better performance of anomaly detection of ADS-B data.

关键词： Training Training data Receivers Generative adversarial networks Feature extraction Data models Generators

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Opportunities of prebiotics for the intestinal health of monogastric animals

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Animal Nutrition 2020年第4期6卷 379-388页

作者： Md A.K.Azad Jing Gao Jie Ma Tiejun Li Bie Tan Xingguo Huang Jie Yin College of Animal Science and Technology Hunan Agricultural UniversityHunan Provincial Engineering Research Center of Applied Microbial Resources Development for Livestock and PoultryChangsha410128China Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process Key Laboratory of Agro-ecological Processes in Subtropical RegionInstitute of Subtropical AgricultureChinese Academy of SciencesNational Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry ProductionChangsha410125China University of Chinese Academy of Sciences Beijing100049China

The goal of prebiotic applications from different sources is to improve the gut ecosystem where the host and microbiota can benefit from *** has already been recognized that prebiotics have potential roles in the gut ecosystem because gut microbiota ferment complex dietary macronutrients and carry out a broad range of functions in the host body,such as the production of nutrients and vitamins,protection against pathogens,and maintenance of immune system *** gut ecosystem is very crucial and can be affected by numerous factors consisting of dietary constituents and commensal *** review focuses on recent scientific evidence,confirming a beneficial effect of prebiotics on animal health,particularly in terms of protection against pathogenic bacteria and increasing the number of beneficial bacteria that may improve epithelial cell barrier *** has also been reviewed that modification of the gut ecosystem through the utilization of prebiotics significantly affects the intestinal health of ***,the identification and characterization of novel potential prebiotics remain a topical issue and elucidation of the metagenomics relationship between gut microbiota alteration and prebiotic substances is necessary for future prebiotic studies.

关键词： Prebiotics Gut microbiota Intestinal health Short-chain fatty acids

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