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Floating plants reduced methane fluxes from wetlands by creating a habitat conducive to methane oxidation

Journal of Environmental Sciences 2024年第1期135卷 149-160页

作者： Fuwei Wang Songhe Zhang Xiuren Hu Xin lv Min Liu Yu Ma Benjamin Manirakiza Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes Ministry of EducationHohai UniversityNanjing 210098China College of Environment Hohai UniversityNanjing 210098China China Machinery International Engineering Desigh and Research Institute co. Ltd.East China Regional CenterNanjing 210008China

Wetlands are one of the important natural sources of atmospheric methane (CH_4),as an important part of wetlands,floating plants can be expected to affect methane release.However,the effects of floating plants on methane release are limited.In this study,methane fluxes,physiochemical properties of the overlying water,methane oxidation potential and rhizospheric bacterial community were investigated in simulated wetlands with floating plants Eichhornia crassipes,Hydrocharis dubia,and Trapa natans.We found that E.crassipes,H.dubia,and T.natans plants could inhibit 84.31%-97.31%,4.98%-88.91%and 43.62%-92.51%of methane fluxes at interface of water-atmosphere compared to Control,respectively.Methane fluxes were negatively related to nutrients concentration in water column but positively related to the aerenchyma proportions of roots,stems,and leaves.At the same biomass,root of E.crassipes (36.44%) had the highest methane oxidation potential,followed by H.dubia (12.99%) and T.natans (11.23%).Forty-five bacterial phyla in total were identified on roots of three plants and 7 bacterial genera (2.10%-3.33%) were known methanotrophs.Type I methanotrophs accounted for 95.07%of total methanotrophs.The pmoA gene abundances ranged from 1.90×10^(16)to 2.30×10^(18)copies/g fresh weight of root biofilms.Abundances of pmoA gene was significantly positively correlated with environmental parameters.Methylotrophy (5.40%) and methanotrophy (3.75%) function were closely related to methane oxidation.This study highlights that floating plant restoration can purify water and promote carbon neutrality partially by reducing methane fluxes through methane oxidation in wetlands.

关键词： Floating plants Methane fluxes Aerenchyma Methanotrophs

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Point Cloud Classification Using Content-Based Transformer via Clustering in Feature Space

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IEEE/CAA Journal of Automatica Sinica 2024年第1期11卷 231-239页

作者： Yahui Liu Bin Tian Yisheng lv Lingxi Li Fei-Yue Wang the State Key Laboratory for Management and Control of Complex Systems Institute of AutomationChinese Academy of SciencesBeijing 100190 the School of Artificial Intelligence University of Chinese Academy of SciencesBeijing 100190 IEEE the Transportation and Autonomous Systems Institute(TASI)and the Department of Electrical and Computer Engineering Purdue School of Engineering and TechnologyIndiana University-Purdue University Indianapolis(IUPUI)Indianapolis 46202 USA

Recently, there have been some attempts of Transformer in 3D point cloud classification. In order to reduce computations, most existing methods focus on local spatial attention,but ignore their content and fail to establish relationships between distant but relevant points. To overcome the limitation of local spatial attention, we propose a point content-based Transformer architecture, called PointConT for short. It exploits the locality of points in the feature space(content-based), which clusters the sampled points with similar features into the same class and computes the self-attention within each class, thus enabling an effective trade-off between capturing long-range dependencies and computational complexity. We further introduce an inception feature aggregator for point cloud classification, which uses parallel structures to aggregate high-frequency and low-frequency information in each branch separately. Extensive experiments show that our PointConT model achieves a remarkable performance on point cloud shape classification. Especially, our method exhibits 90.3% Top-1 accuracy on the hardest setting of ScanObjectN N. Source code of this paper is available at https://***/yahuiliu99/PointC onT.

关键词： Content-based Transformer deep learning feature aggregator local attention point cloud classification

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Building decarbonization based on building loads flexibility and clusters' collaboration

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National Science Open 2024年第3期3卷 7-12页

作者： Jian Ge Guoquan lv Jiahuan Tang Kang zhao Department of Architecture Zhejiang University International Research Center for Green Building and Low-Carbon City International CampusZhejiang University

The decarbonization of the building sector is crucial for global sustainable development because it is responsible for about 40%of global carbon emissions and has been growing continuously at a rate of 2%to 3%per year [1].Over time,significant energy-saving milestones have been achieved through technologies such as improving equipment efficiency,building envelope performance,and utilization of sustainable resources.

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More common RNAemia in the early stage of severe SARS-CoV-2 BF.7.14 infections in pediatric patients

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Biosafety and Health 2024年第1期6卷 5-11页

作者： Yu Sun Runan Zhu Yang Pan Ri De Shuang Liu Liping Jia Bing lv Xiaoyun Li Dongmei Chen Yao Yao Dong Qu Daitao Zhang Linqing zhao Laboratory of Virology Bejing Key Laboratory of Etiology of Viral Diseases in ChildrenCapital Institute of PediatricsBejing 100020China Institute for Infectious Disease and Endemic Disease Control Bejing Center for Disease Control and Prevention Beijing 100013China Department of Intensive Care Unit Affiliated Children's Hospital of Capital Institute of PediatricsBeijing 100020China

The risk factors of severe infections in children during the severe acute respiratory syndrome coronavirus 2(SARS‐CoV‐2)outbreak in Beijing remain elusive.SARS‐CoV‐2‐positive children admitted to the intensive care unit(ICU)with collected plasma specimens were enrolled and screened for common pathogens using capillary electrophoresis‐based multiplex PCR from December 12,2022,to January 24,2023.The SARS‐CoV‐2 subvariants were identified using next‐generation sequencing.Plasma was positive for two(positive;P),one(suspicious;S),or no(negative;N)SARS‐CoV‐2 genes were classified as plasmatic RNA‐positive(RNAemia;P+S)or without RNAemia(N).Clinical and laboratory data of the enrolled cases were then collected and analyzed.The 34 enrolled children included 26 males and 24 younger than three years.All were negative for other respiratory pathogens.BF.7.14(18/29)was the predominant subvariant.Viral loads in respiratory specimens,hours from symptom onset to the first respiratory specimen collection(time‐variable),with comorbidities and BF.7.14 and BA.5.2 distributions were significantly different in P vs.N and RNAemia vs.without RNAemia group.Among most cases,the T lymphocyte ratios decreased,while the cytokine level and the B lymphocyte ratio increased.The time variables were 2.22±2.05 and 4.00±2.49 days in BF.7.14 and BA.5.2 infections,respectively.In conclusion,SARS‐CoV‐2 was more likely to cause severe infections among males aged≤3 years old with comorbidities during the SARS‐CoV‐2 outbreak in Beijing,while RNAemia is more common in children at the early stage of severe BF.7.14 infections,and most had high cytokine levels and B‐cell activation.

关键词： Severe SARS‐CoV‐2 infection Pediatric patients Risk factor RNAemia BF.7.14

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Enhancing CO_(2)capture of an aminoethylethanolamine-based non-aqueous absorbent by using tertiary amine as a proton-transfer mediator:From performance to mechanism

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Journal of Environmental Sciences 2024年第6期140卷 146-156页

作者： Xiaobin Zhou DanWang Chao Liu Guohua Jing Bihong lv Dunqiu Wang College of Environmental Science and Engineering Guilin University of TechnologyGuilin 541004China The Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control Guilin University of TechnologyGuilin 541004China College of Chemical Engineering Huaqiao UniversityXiamen 361021China

Non-aqueous absorbents(NAAs)have attracted increasing attention for CO_(2)capture because of their great energy-saving potential.Primary diamines which can provide high CO_(2)absorption loading are promising candidates for formulating NAAs but suffer disadvantages in regenerability.In this study,a promising strategy that using tertiary amines(TAs)as proton-transfer mediators was proposed to enhance the regenerability of an aminoethylethanolamine(AEEA,diamine)/dimethyl sulfoxide(DMSO)(A/D)NAA.Surprisingly,some employed TAs such as N,N-diethylaminoethanol(DEEA),N,N,N’,N’’,N’’-pentamethyldiethylenetriamine(PMDETA),3-dimethylamino-1-propanol(3DMA1P),and N,N-dimethylethanolamine(DMEA)enhanced not only the regenerability of the A/D NAA but also the CO_(2)absorption performance.Specifically,the CO_(2)absorption loading and cyclic loading were increased by about 12.7%and 15.5%-22.7%,respectively.The TA-enhanced CO_(2)capture mechanism was comprehensively explored via nuclear magnetic resonance technique and quantum chemical calculations.During CO_(2)absorption,the TA acted as an ultimate proton acceptor for AEEA-zwitterion and enabled more AEEA to form carbamate species(AEEACOO-)to store CO_(2),thus enhancing CO_(2)absorption.For CO_(2)desorption,the TA first provided protons directly to AEEACOO-as a proton donor;moreover,it functioned as a proton carrier and facilitated the low-energy step-wise proton transfer from protonated AEEA to AEEACOO-.Consequently,the presence of TA made it easier for AEEACOO-to obtain protons to decompose,resulting in enhanced CO_(2)desorption.In a word,introducing the TA as a proton-transfer mediator into the A/D NAA enhanced both the CO_(2)absorption performance and the regenerability,which was an efficient way to“kill two birds with one stone”.

关键词： Carbon dioxide capture Non-aqueous absorbent Tertiary amine Proton-transfer mediator Enhanced mechanism

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Design of double protograph LDPC codes based JSCC systems via the ACE-PEG algorithm

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Science China(Information Sciences) 2024年第7期67卷 339-340页

作者： Yijie lv Jiguang HE Shaohua HONG Department of Information and Communication Engineering Xiamen University Technology Innovation Institute Centre for Wireless Communications Oulu University

In this study, we present a state-of-the-art design of double protograph low-density parity-check (DP-LDPC) codes based on progressive edge-growth (PEG) algorithm with approximated cycle extrinsic message degree (ACE)... 详细信息

关键词： Benchmarking

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High critical current density in Li_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12) electrolyte via interfacial engineering with complex hydride

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Rare Metals 2024年第2期43卷 692-701页

作者： Ying-Tong lv Teng-Fei Zhang zhao-Tong Hu Guang-Lin Xia Ze-Ya Huang Zhen-Hua Liu Li-Hua Que Cai-Ting Yuan Fang-Qin Guo Takayuki Ichikawa Xue-Bin Yu College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing210016China Centre for Hydrogenergy College of Materials Science and TechnologyNanjing University of Aeronautics and AstronauticsNanjing210016China Department of Materials Science Fudan UniversityShanghai200433China Graduate School of Advanced Science and Engineering Hiroshima University1-4-1 KagamiyamaHigashi-Hiroshima739-8527Japan

Garnet-type solid-state batteries(SSBs)are considered to be one of the most promising candidates to realize next-generation lithium metal batteries with high energy density and safety.However,the dendrite-induced short-circuit and the poor interfacial contact impeded the practical application.Herein,interface engineering to achieve low interfacial resistance without high temperature calcination was developed,which Li_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)(LLZTO)was simply coated with complex hydride(Li_(4)(BH_(4))_(3)I(3L1L))in various mass ratios n(Li_(4)(BH_(4))_(3)I)-(100−n)LLZTO(10≤n≤40).The interfacial conductivity increases by more than three orders of magnitude from 8.29×10^(−6)S·cm^(−1)to 1.10×10^(−2)S·cm^(−1).Symmetric Li cells exhibit a high critical current density(CCD)of 4.0 mA·cm^(−2) and an excellent cycling stability for 200 h at 4.0 mA·cm^(−2).SSBs with polymeric sulfur-polyacrylonitrile(SPAN)cathode achieve a high discharge capacity of 1149 mAh·g^(−1) with a capacity retention of 91%after 100 cycles(0.2 C).This attempt guides a simple yet efficient strategy for obtaining a stable Li/LLZTO interface,which would promote the development of solid-state batteries.

关键词： Hydrides Li_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)(LLZTO) Critical current density Solid-state electrolytes(SSEs) Lithium-sulfur batteries

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An aqueous rechargeable Fe//LiMn_(2)O_()hybrid battery with superior electrochemical performance beyond mainstream Fe-based batteries

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Nano Research 2024年第6期17卷 5168-5178页

作者： Yu Liu Dehui Xie Yuxin Shi Rongguan lv Yingna Chang Yuzhen Sun Zhiyuan zhao Jindi Wang Kefan Song Huayu Wu Tuan K.A.Hoang Rong Xing Huan Pang Institute of New Energy on Chemical Storage and Power Sources School of Chemical and Environmental EngineeringYancheng Teachers UniversityYancheng 224000China School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225009China Department of Chemical Engineering University of Waterloo200 University Avenue WestWaterlooOntario N2L 3G1Canada

Aqueous rechargeable batteries(ARBs)are generally safer than non-aqueous analogues,they are also less-expensive,and more friendly to the environment.However,the inherent disadvantage of the narrow electrochemical window of H2O seriously restricts the energy density and output voltage of ARBs,especially aqueous rechargeable Fe-based batteries.Herein,we introduce a new battery system:the anode contains C@Fe/Fe_(2)O_(3)composite,which is interfaced with an alkaline electrolyte;the cathode contains LiMn_(2)O_()in contact with a neutral electrolyte.A Li^(+)-conducting membrane is carefully selected to decouple the electrode-electrolyte,which effectively widens the electrochemical window to above 2.65 V,thereby enables an aqueous rechargeable iron battery.Its average output voltage is 1.83 V and its energy density is 235.3 Wh/kg at 549 W/kg.In this work,we propose the energy storage mechanism with the aid of density functional theory(DFT).The calculated reduction potential of the anode agrees with the experimental value.Furthermore,this battery system demonstrates long cycle lifespan of approximately 2500 cycles at 2 A/g,corresponding to a capacity retention of 82.1%.These results are very far superior than those of mainstream aqueous rechargeable Fe-based batteries,which guarantee future investigation for storing electricity energy.

关键词： aqueous battery high voltage high energy iron oxide theoretical calculation

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Chain Dynamics Heterogeneity in Plasticized Poly(vinyl butyral)(PVB) as Elucidated by Solid-State NMR

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Chinese Journal of Polymer Science 2024年第1期42卷 113-124,I0010页

作者： Jing lv Xu Chen Zi-Shuo Wu Ya-Hui Li Wei Chen National Synchrotron Radiation Laboratory Anhui Provincial Engineering Laboratory of Advanced Functional Polymer FilmCAS Key Laboratory of Soft Matter ChemistryUniversity of Scienceand Technology of ChinaHefei 230026China

The chain dynamics heterogeneity of the poly(vinyl butyral)(PVB) plasticized by triethylene glycol bis(2-ethylhexa noate)(TEG-EH) was investigated by various solid-state NMR techniques.The plasticized PVB shows two domains in distinct molecular dynamics differences,namely,rigid and soft domains,where the latter is the plasticizer-rich domain.The time domain low field NMR was first used to investigate the dynamics heterogeneity of the plasticized PVB,and the results show the decreasing activated energy of components in the soft domain of plasticized PVB(E_a=20.2 kJ/mol) as compared with that of the pristine one(E_a=24.3 kJ/mol).Detailed dynamics heterogeneity was obtained by high-field NMR with site-specific features.The quadrupole-echo ~2H-NMR was adopted to elucidate the dynamics heterogeneity of the vinyl alcohol(VA) units,where only the hydroxyl group of VA is deuterated.The ~1H-^(13)C WISE NMR spectra show that there is not much difference in the mobility of the VB unit in PVB with and without plasticizer,whereas the glass transition temperature differed by approximately 53℃.This is further supported by Torchia's T_1 relaxation measurements.The origin of such an unusual phenomenon is attributed to the critical role of the remaining VA(~22%) in the soft domain,where the VA units locally aggregate through hydrogen bonding.Also,the existence of a mobility gradient in the VB unit has been demonstrated.Moreover,the mobility difference for VB with different stereo-geometry(meso or racemic conformation) is observed for the first time.This indicates the importance of modulating the ratio of meso over racemic VB for controlling the macroscopic perfo rmance of PVB.

关键词： Poly(vinyl butyral) Dynamics heterogeneity Plasticizer Solid state NMR

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Characterization of whole genomes from recently emerging Mpox cases in several regions of China,2023

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Science China(Life Sciences) 2024年第5期67卷 1079-1081页

作者： Changcheng Wu Lunbiao Cui Yang Pan Ziquan lv Mingxiao Yao Wenling Wang Fei Ye Weibang Huo Li zhao Baoying Huang Fengcai Zhu Roujian Lu Yao Deng Quanyi Wang Wenjie Tan NHC Key Laboratory of Biosafety National Institute for Viral Disease Control and PreventionChinese Center for Disease Control and PreventionBeijing 102206China NHC Key Laboratory of Enteric Pathogenic Microbiology Jiangsu Provincial Medical Key Laboratory of Pathogenic Microbiology in Emerging Major Infectious DiseasesJiangsu Provincial Center for Disease Control and PreventionNanjing 210009China Beijing Center for Disease Prevention and Control Beijing 100013China Central Laboratory Shenzhen Center for Disease Control and PreventionShenzhen 518055China Shandong Center for Disease Control and Prevention Jinan 250014China

Dear Editor,Mpox(formerly known as monkeypox)is a zoonotic disease caused by infection with the monkeypox virus(MPXV).Mpox cases have been sporadic over the past few decades,with outbreaks occurring in only a limited ... 详细信息

关键词： cases primarily imported

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