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Precoder Design and Impulsive Noise Mitigation Scheme for Industrial Wireless Communications

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China Communications 2021年第4期18卷 182-197页

作者： Yanjing Sun Xinyan Li Jiasi Zhou Ruirui Chen Bowenwang yanfen wang School of Information and Control Engineering China University of Mining and TechnologyXuzhou 221008JiangsuChina Xuzhou Engineering Research Center of Intelligent Industry Safety and Emergency Collaboration Xuzhou 221008JiangsuChina

In industrial wireless scenarios,the impulsive noise(IN)incurred by machine running or operation causes a serious influence on the powerlimited industrial wireless *** is challenging to ensure efficient and reliable transmission with quality of service(QoS)guarantee for machinetype communication devices(MTCDs).Considering the IN in the industrial process,this paper establishes the multiuser multiple-input single-output(MU-MISO)orthogonal frequency division multiplexing(OFDM)system model,which combines transmitter and receiver *** precoding schemes are designed to improve communication effectiveness at the *** specifically,the precoder design scheme which combines semi-definite relaxation(SDR)with difference-of-two-convex-function(D.C.)iterative algorithm,is developed by utilizing the Dinkelbach method to improve the system *** decrease the computational complexity,we devise the quadratic-based fractional programming(QFP)algorithm,which decouples the variables by using a quadratic transform *** this basis,the IN mitigation scheme is studied to reduce the system error rate(SER)at the *** the goal of improving the reliability of industrial wireless communications,we propose a hybrid nonlinear IN mitigation(HNINM)scheme and then derive its closed-form expression of *** simulation results show that the proposed QFP algorithm achieves superior performance while the HNINM scheme decreases the SER of industrial wireless communications.

关键词： Industrial wireless communications precoder design impulsive noise mitigation

Diversity of methanotrophs in Zoige wetland soils under both anaerobic and aerobic conditions

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Journal of Environmental Sciences 2010年第8期22卷 1232-1238页

作者： Juanli Yun Anzhou Ma Yaoming Li Guoqiang Zhuang yanfen wang Hongxun Zhang Research Center for Eco-Environment Sciences Chinese Academy of Sciences Beijing 100085 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

Zoige wetland is one of the most important methane emission centers in China. The oxidation of methane in the wetland affects global warming, soil ecology and atmospheric chemistry. Despite their global significance, microorganisms that consume methane in Zoige wetland remain poorly characterized. In this study, we investigated methanotrophs diversity in soil samples from both anaerobic site and aerobic site in Zoige wetland using pmoA gene as a molecular marker. The cloning library was constructed according to the pmoA sequences detected. Four clusters of methanotrophs were detected. The phylogenetic tree showed that all four clusters detected were affiliated to type I methanotrophs. Two novel clusters （cluster 1, cluster 2） were found to relate to none of the recognized genera of methanotrophs. These clusters have no cultured representatives and reveal an ecological adaptation of particular uncultured methanotrophs in Zoige wetland. Two clusters were belonging to Methylobacter and Methylococcus separately. Denaturing gradient gel electrophoresis gel bands pattern retrieved from these two samples revealed that the community compositions of anaerobic soil and aerobic soil were different from each other while anaerobic soil showed a higher metanotrophs diversity. Real-time PCR assays of the two samples demonstrated that aerobic soil sample in Zoige wetland was 1.5 times as much copy numbers as anaerobic soil. These data illustrated that methanotrophs are a group of microorganisms influence the methane consumption in Zoige wetland.

关键词： cloning library denaturing gradient gel electrophoresis methanotrophs pmoA gene real-time PCR Zoige wetland

Cold and humid climates enrich soil carbon stock in the Third Pole grasslands

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The Innovation 2024年第1期5卷 9-10页

作者： yanfen wang Anquan Xia Kai Xue College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China Beijing Yanshan Earth Critical Zone National Research Station University of Chinese Academy of SciencesBeijing 101408China State Key Laboratory of Tibetan Plateau Earth System Resources and Environment(TPESRE)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China State Key Laboratory of Plateau Ecology and Agriculture Qinghai UniversityXining 810016China Key Laboratory of Adaptation and Evolution of Plateau Biota Northwest Institute of Plateau BiologyChinese Academy of SciencesXining 810001China Binzhou Institute of Technology Weiqiao-UCAS Science and Technology ParkBinzhou 256606China

As a unique geographic unit,the Third Pole is globally recognized as the largest and highest mountainous *** amounts of soil organic carbon(SOC)are stored in this region,whose top layer is active in biochemical processes and highly sensitive to environmental *** warming intensity in the Third Pole has been predicted to be at least 0.3℃ higher than the global average by the end of the 21^(st) century.1 Therefore,it is essential to understand the underlying mechanisms,especially the hydrothermal factors,controlling the top layer SOC in the Third *** may help to predict the dynamics of soil carbon stock in future climate scenarios.

关键词： soil mountainous globally

Calculation of prestressed anchor segment by 3D infinite element

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Frontiers of Structural and Civil Engineering 2009年第1期3卷 63-66页

作者： yanfen wang Hongyang XIE Yuanhan wang Bridge Science Research Institute Major Bridge Engineering BureauMinistry of RailwayWuhan 430034China School of Civil Engineering and Mechanics Huazhong University of Science&TechnologyWuhan 430074China

Based on 1D infinite element theory,the coordinate transformation and shape function of 3D point-radiation 4-node infinite elements were *** were coupled with 8-node finite elements to compute the compressive deformation of the prestressed anchor *** results indicate that when the prestressed force acts on the anchor segment,the stresses and displacements in the rock around the anchor segment are concentrated in the zone center with the anchor axis and are subjected to exponential ***,the stresses and the displacement spindles are *** calculation results of the infinite element are close to the theoretical results.

关键词： infinite element prestressed anchor couple finite element

Can Digital Intelligence and Cyber-Physical-Social Systems Achieve Global Food Security and Sustainability?

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IEEE/CAA Journal of Automatica Sinica 2023年第11期10卷 2070-2080页

作者： yanfen wang Mengzhen Kang Yali Liu Juanjuan Li Kai Xue Xiujuan wang Jianqing Du Yonglin Tian Qinghua Ni Fei-Yue wang College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049 Beijing Yanshan Earth Critical Zone National Research Station University of Chinese Academy of SciencesBeijing 101408 State Key Laboratory of Tibetan Plateau Earth System Environment and ResourcesInstitute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China State Key Laboratory of Multimodal Artificial Intelligence Systems Institute of AutomationChinese Academy of Sciences(CASIA)Beijing 100190 School of Artificial Intelligence University of Chinese Academy of SciencesBeijing 100049China School of Grassland Science Beijing Forestry UniversityBeijing 100083China State Key Laboratory of Multimodal Artificial Intelligence Systems Institute of AutomationChinese Academy of SciencesBeijing 100190China State Key Laboratory of Plateau Ecology and Agriculture Qinghai UniversityXining 810016 Key Laboratory of Adaptation and Evolution of Plateau Biota Northwest Institute of Plateau BiologyChinese Academy of SciencesXining 810001 Binzhou Institute of Technology Weiqiao-UCAS Science and Technology ParkBinzhou 256606China Beijing Yanshan Earth Critical Zone National Research Station University of Chinese Academy of SciencesBeijing 101408China Department of Engineering Science Faculty of Innovation EngineeringMacao University of Science and TechnologyMacao 999078 State Key Laboratory of Multimodal Artificial Intelligence Systems Institute of AutomationChinese Academy of Sciences(CASIA)Beijing 100190China Faculty of Innovation Engineering Macao University of Science and TechnologyMacao 999078 Beijing Engineering Research Center of Intelligent Systems and Technology Chinese Academy of SciencesBeijing 100098 State Key Laboratory for Management and Control of Complex Systems Chinese Academy of SciencesBeijing 100190China IEEE

Plants sequester carbon through photosynthesis and provide primary productivity for the ecosystem. However, they also simultaneously consume water through transpiration, leading to a carbon-water balance relationship. Agricultural production can be regarded as a form of carbon sequestration *** the perspective of the natural-social-economic complex ecosystem, excessive water usage in food production will aggravate regional water pressure for both domestic and industrial purposes. Hence, achieving a harmonious equilibrium between carbon and water resources during the food production process is a key scientific challenge for ensuring food security and sustainability. Digital intelligence(DI) and cyber-physical-social systems(CPSS) are emerging as the new research paradigms that are causing a substantial shift in the conventional thinking and methodologies across various scientific fields, including ecological science and sustainability studies. This paper outlines our recent efforts in using advanced technologies such as big data, artificial intelligence(AI), digital twins, metaverses, and parallel intelligence to model, analyze, and manage the intricate dynamics and equilibrium among plants, carbon, and water in arid and semiarid ecosystems. It introduces the concept of the carbon-water balance and explores its management at three levels: the individual plant level, the community level, and the natural-social-economic complex ecosystem level. Additionally, we elucidate the significance of agricultural foundation models as fundamental technologies within this context. A case analysis of water usage shows that, given the limited availability of water resources in the context of the carbon-water balance, regional collaboration and optimized allocation have the potential to enhance the utilization efficiency of water resources in the river basin. A suggested approach is to consider the river basin as a unified entity and coordinate the relationship between the

关键词： Carbon-water balance decision-support digital intelligence(DI) foundation models planning

Unravelling how biochar and dung amendments determine the functional structure and community assembly related to methane metabolisms in grassland soils

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Biochar 2022年第1期4卷 377-390页

作者： Qingzhou Zhao yanfen wang Zhihong Xu Juanli Yun Zhisheng Yu College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049People’s Republic of China College of Urban and Environmental Science Peking UniversityBeijing 100871People’s Republic of China School of Environment and Science Griffith UniversityNathanQLD 4111Australia Center of Planetary Health and Food Security Griffith Univer-sityNathanQLD 4111Australia Yanshan Earth Critical Zone and Surface Flux Observation Research Station Chinese Academy of SciencesBeijing 100049People’s Republic of China State Key Laboratory of Microbial Resources Institute of MicrobiologyChinese Academy of SciencesBeijing 100101People’s Republic of China RCEES-IMCAS-UCAS Joint-Lab of Microbial Technology for Environmental Science Beijing 100085People’s Republic of China

Biochar and dung amendments have been extensively employed in soil remediation and fertilization of grasslands,which are the largest terrestrial sinks for ***,how these exogenous amendments regulate methane metabolisms at the molecular and community levels remains *** this study,we investigated the functional genes and community assemblies of methanogens and methanotrophs using Geochip 5.0 and high-throughput sequencing to reveal the impacts of biochar and dung on soil methanogenesis and methane *** interac-tions between methane metabolic genes and other biogeochemical genes were also *** to Geo-chip microarrays,methanogenic gene mcrA decreased and increased with dung or biochar amendment,respectively;The methanotrophic gene pmoA showed a reverse but not significant *** processes contributed 65.51%to replace homogeneous selections as primary driving forces of methanogen assembly after dung amend-ment;the contribution of dispersal limitation increased to 46.13%in methanotroph assembly after biochar *** diversity and association of co-occurrence networks for carbon-nitrogen cycling genes decreased after exogenous *** results indicated that biochar and dung amendments prominently regulated the functional genes and community assembly involved in methane *** co-existence patterns of methane metabolic genes and other related geochemical genes were also shaped by these *** study provides the scientific reference for the development of grassland management in the context of global warming.

关键词： Biochar amendment Dung amendment Methane metabolism Nitrogen cycling Community assembly Geochip 5.0

Excitation-emission matrix (EEM) fluorescence spectroscopy for characterization of organic matter in membrane bioreactors: Principles, methods and applications

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Frontiers of Environmental Science & Engineering 2020年第2期14卷 55-73页

作者： Jinlan Yu Kang Xiao Wenchao Xue Yue-xiao Shen Jihua Tan Shuai Liang yanfen wang Xia Huang College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China CAS Center for Excellence in Tibetan Plateau Earth Sciences Beijing 100101China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China School of Environment Resources and DevelopmentAsian Institute of TechnologyKlong LuangPathumthani 12120Thailand Department of Civil Environmentaland Construction EngineeringTexas Tech UniversityLubbockTX 79409USA College of Environmental Science and Engineering Beijing Forestry UniversityBeijing 100083China Research and Application Center for Membrane Technology School of EnvironmentTsinghua UniversityBeijing 100084China

The membrane bioreactor(MBR)technology is a rising star for wastewater *** pollutant elimination and membrane fouling performances of MBRs are essentially related to the dissolved organic matter(DOM)in the ***-dimensional excitation-emission matrix(3D-EEM)fluorescence spectroscopy,a powerful tool for the rapid and sensitive characterization of DOM,has been extensively applied in MBR studies;however,only a limited portion of the EEM fingerprinting information was *** paper revisits the principles and methods of fluorescence EEM,and reviews the recent progress in applying EEM to characterize DOM in MBR *** systematically introduced the information extracted from EEM by considering the fluorescence peak location/intensity,wavelength regional distribution,and spectral deconvolution(giving fluorescent component loadings/scores),and discussed how to use the information to interpret the chemical compositions,physiochemical properties,biological activities,membrane retention/fouling behaviors,and migration/transformation fates of DOM in MBR *** addition to conventional EEM indicators,novel fluorescent parameters are summarized for potential use,including quantum yield,Stokes shift,excited energy state,and fluorescence *** current limitations of EEM-based DOM characterization are also discussed,with possible measures proposed to improve applications in MBR monitoring.

关键词： excitation-emission matrix(EEM) dissolved organic matter(DOM) membrane bioreactor(MBR) fluorescence indicator characterization method

Iron-bound organic carbon dynamics in peatland profiles:The preservation equivalence of deep and surface soil

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Fundamental Research 2023年第6期3卷 852-860页

作者： Xinya Huang Xinwei Liu Liangshuai Chen yanfen wang Huai Chen Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization&Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province Chengdu Institute of BiologyChinese Academy of SciencesChengdu 610041China Zoige Peatland and Global Change Research Station Chinese Academy of SciencesHongyuan 624400China CAS Center for Excellence in Tibetan Plateau Earth Sciences Chinese Academy of Sciences(CAS)Beijing 100101China. University of Chinese Academy of Sciences Beijing 100049China

More than half of the carbon pools in peatlands are stored in the soil layers below 30 cm,yet little is known about the carbon stabilizing factors at these *** iron oxide minerals are considered to be important for stabilizing organic carbon(OC),their role in the preservation of OC in peatlands,especially in the deep layers,is poorly ***,we collected 1 m soil profiles from six peatlands in Central and West China to quantitatively study the vertical distribution characteristics of iron-bound OC(Fe-bound OC),and the influencing physicochemical properties of the *** results showed that the content of reactive iron(FeR)was enriched in the top layer and decreased gradually with *** Fe-bound OC was positively correlated with FeR,its concentration did not decrease with depth in the peat *** were no obvious trends in the distributions of FeR and Fe-bound OC with water level fluctuations in the peat *** addition,the proportion of Fe-bound OC to soil organic carbon in the deep peat(31 to 100 cm)was equivalent to that in the surface peat(0 to 30 cm),indicating that iron oxide mineral provides comparable protection of OC in both *** to upper estimates of global peatland carbon storage(612 Pg),it could be predicted that 23.81±11.75 Pg of OC is protected by association with *** results indicated that iron oxide minerals are the effective"rusty sink"of OC sequestration in peatland,and a key factor for its long-term *** results from this study make a valuable contribution to the carbon dynamics knowledgebase for peatlands,and provide a basis for improved predictive simulations.

关键词： Iron-bound organic carbon Peatland Soil profile Reactive Fe Carbon preservation

“C-wetland”:A new paradigm to enhance conservation of carbon-rich wetlands

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The Innovation 2023年第2期4卷 13-14页

作者： Huai Chen Zicheng Yu Ning Wu yanfen wang Xinwei Liu Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization&Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province Chengdu Institute of BiologyChinese Academy of SciencesChengdu 610041China Zoige Peatland and Global Change Research Station Chinese Academy of SciencesHongyuan 624400China Key Laboratory of Geographical Processes and Ecological Security in Changbai Mountains(Ministry of Education) School of Geographical SciencesNortheast Normal UniversityChangchun 130024China State Key Laboratory of Black Soils Conservation and Utilization Northeast Institute of Geography and AgroecologyChinese Academy of SciencesChangchun 130102China College of Resources and Environment University of Chinese Academy of SciencesBeijing 101408China State Key Laboratory of Tibetan Plateau Earth System Resources and Environment(TPESRE)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China

Wetlands have the highest ecosystem service value among all terrestrial *** their ecosystem services,carbon sequestration and its potential ability to mitigate climate change have been extensively discussed recently,not only in the academic community but in media during COP27 of UNFCCC and COP14 of *** particular,peatlands-peat-accumulating wetlands-accumulate 600 Gt C globally.

关键词： wetlands carbon globally