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Carbon footprint and carbon neutrality pathway of green tea in China

Advances in Climate Change Research 2022年第3期13卷 443-453页

作者： Ming-Bao HE Shi-Xiang ZONG Ying-Chun li Ming-Ming MA Xin MA kuo li Xue HAN Ming-Yue ZHAO li-Ping GUO Yin-Long XU Institute of Environment and Sustainable Development in Agriculture Chinese Academy of Agricultural SciencesBeijing 100081China Beijing Key Laboratory for Forest Pest Control Beijing Forestry UniversityBeijing 100083China

With the rising popularity of the concept of“carbon neutralization”,low-carbon products are likely to gain more *** to this,green tea-an important beverage that is widely consumed in China-along with emissions from planting,processing,and use phase should be given ***,quantifying the carbon footprint(CF)of green tea is an essential task in developing the pathway to carbon *** this study,we quantified the CF and mitigation potential of green tea through life cycle assessment,after which we investigated the pathway toward carbon neutrality in 16 major tea-producing regions(except Hainan and Taiwan)in *** system boundary was divided into six subsystems from cradle to grave:cultivation,processing,transport,packaging,consumption,and *** results showed that the total carbon emissions of green tea reached 44.13 Mt CO_(2)eq in 2019,of which 43%came from consumption and 28%from *** were 18.78 Mt CO_(2)eq emissions from fertilizer production and application,while there was a 7.71 Mt CO_(2)eq carbon sink of tea *** average carbon intensity was 24.30 kg CO_(2)eq kg−1 tea,while Shandong and Guizhou ranked as the top two ***,Hubei,and Yunnan Provinces had the largest amounts of carbon emissions at 6.79,6.14,and 5.96 Mt CO_(2)eq,*** 2030,2050 and 2060,total carbon emissions would be reduced by 46%,63%,and 86%,respectively,under carbon neutrality assumption.A small amount of 6.14 Mt CO_(2)eq carbon emissions was retained to be offset by carbon trading or zero-carbon ***,the results indicate that adopting low-carbon fertilizers and clean energies will be a key entry point for carbon-neutral green tea.

关键词： Carbon neutrality Pathway life cycle assessment Carbon footprint Green tea China

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2022 HP special volume:Interdisciplinary high pressure science and technology

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Matter and Radiation at Extremes 2023年第6期8卷 1-3页

作者： Ho-Kwang Mao Bin Chen Huiyang Gou kuo li Jin liu lin Wang Hong Xiao Wenge Yang Center for High Pressure Science and Technology Advanced Research 10 Xibeiwang East RoadHaidianBeijing 100094China

High pressure science and technology is a vast area of inter-disciplinary research that encompasses the fields of physics,chem-istry,geoscience,and materials science and in which the science of ordinary matter is only a special case under ambient ***,the physical variable of force exerted on the chem-ical bonding of a material,directly controls the material’s phys-ical and chemical properties.

关键词： properties. ambient ordinary

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Jamming Monitoring Technology of the Space Situational Awareness Facilities:A Comprehensive Survey

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Journal of Beijing Institute of Technology 2022年第2期31卷 152-168页

作者： Sitian liu Chunli Zhu Chen Yang liyang Chen Kun Fang kuo li Xing He Zhipeng Wang liheng Bian School of Information and Electronics Beijing Institute of TechnologyBeijing 100081China School of Electronic and Information Engineering Beihang UniveisityBeijing 100191China. the 20th Research Institute of China Electronics Technology Group Xi’an 710000China.

Complicated electromagnetic environments of the space situational awareness facilities(i.e.,satellite navigation systems,radar)would significantly impact normal *** monitoring and the corresponding diagnosis of the jamming signals are essential to normal opera-tions and the innovations in anti-jamming *** paper demonstrates a comprehensive survey on jamming monitoring algorithms and *** methods in dealing with jamming signals are summarized ***,the jamming detection,identification,and direc-tion finding techniques are addressed *** on the established studies,we also provide some potential trends of the demonstrated jamming monitoring issues.

关键词： space situational awareness facilities jamming monitoring deep learning jamming de-tection jamming identification jamming direction finding

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Identification of Heterodera schachtii on sugar beet in Xinjiang Uygur Autonomous Region of China

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Journal of Integrative Agriculture 2022年第6期21卷 1694-1702页

作者： PENG Huan liU Hui GAO li JIANG Ru li Guang-kuo GAO Hai-feng WU Wei WANG Jun ZHANG Yu HUANG Wen-kun KONG ling-an PENG De-liang State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193P.R.China The National Agro-Tech Extension and Service Center Beijing 100026P.R.China Key Laboratory of Integrated Pest Management on Crops in Northwestern Oasis of Ministry of Agriculture and Rural Affairs Institute of Plant ProtectionXinjiang Academy of Agricultural SciencesUrumqi 830091P.R.China Agricultural Technology Extension Service Center of Xinyuan County Yining 835800P.R.China Plant Protection Station of Xinjiang Uygur Autonomous Region Urumqi 830006P.R.China

The sugar beet cyst nematode,Heterodera schachtii,is a major parasite of sugar beet which has been recognized and listed as a quarantine nematode in China and more than 20 countries and regions worldwide.A survey for important nematodes was undertaken in the sugar beet planting area of China during 2015-2018,and numerous cysts were collected from sugar beet fields in Xinyuan County,Xinjiang Uygur Autonomous Region of *** observations of morphological and morphometric characteristics revealed that cysts,vulval cones and second-stage juveniles of the Xinjiang population were in the same range of each other and within those of other reported *** *** analysis of rDNA-ITS,28S-D2/D3 and mtDNA cytochrome c oxidase subunit 1(COI)gene sequences suggested that the Xinjiang population clustered in a branch with those foreign populations,and the sequence similarity was as high as 99.81-100%.Moreover,this result was confirmed by PCR assay with species-specific primer SHF6 and rDNA2 of ***,and the pathogenicity test confirmed successful Xinjiang population reproduction in both plant *** conclusion,based on morphological and molecular characterization,this study confirmed that the cyst nematode population collected from sugar beet fields in Xinjiang is *** far as we know,this is the first report of *** on sugar beets in Xinjiang,China.

关键词： sugar beet cyst nematode Heterodera schachtii morphological molecular identification

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A highly reliable encoding and decoding communication framework based on semantic information

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Digital Communications and Networks 2024年第3期10卷 509-518页

作者： Yichi Zhang Haitao Zhao kuo Cao li Zhou Zhe Wang Yueling liu Jibo Wei College of Electronic Science and Technology National University of Defense TechnologyChangsha 410073China

Increasing research has focused on semantic communication,the goal of which is to convey accurately the meaning instead of transmitting symbols from the sender to the *** this paper,we design a novel encoding and decoding semantic communication framework,which adopts the semantic information and the contextual correlations between items to optimize the performance of a communication system over various *** the sender side,the average semantic loss caused by the wrong detection is defined,and a semantic source encoding strategy is developed to minimize the average semantic *** further improve communication reliability,a decoding strategy that utilizes the semantic and the context information to recover messages is proposed in the *** simulation results validate the superior performance of our strategies over state-of-the-art semantic coding and decoding policies on different communication channels.

关键词： Semantic information Semantic encoding method Context-based decoding method

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考虑井阻随时空变化的竖井地基大应变非线性固结分析

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岩石力学与工程学报 2023年第S1期42卷 3743-3754页

作者：李阔李传勋江苏大学土木工程与力学学院江苏镇江212013

高压缩性软土具有典型的几何非线性和材料非线性特征,但目前能考虑井阻随时空同时变化的高压缩性土竖井地基大应变非线性固结解答还很鲜见。考虑土体的非线性压缩渗透特征,引入随时间和深度同时变化的变井阻模型,在拉格朗日坐标系下建... 详细信息

高压缩性软土具有典型的几何非线性和材料非线性特征,但目前能考虑井阻随时空同时变化的高压缩性土竖井地基大应变非线性固结解答还很鲜见。考虑土体的非线性压缩渗透特征,引入随时间和深度同时变化的变井阻模型,在拉格朗日坐标系下建立以超静孔压为变量的竖井地基大应变非线性固结模型。利用有限差分法获得模型的数值解答,并将其与特殊情况下竖井地基小应变解析解及大应变固结解对比分析以验证其可靠性。不同工况下竖井地基大应变固结性状分析表明:井阻随时空演化的变井阻效应会明显降低竖井地基的固结速率,且井阻的时间效应对固结速率的影响更明显,但变井阻效应并不会影响竖井地基的最终沉降量;初始有效应力均匀分布下的竖井地基固结速率相比其随深度线性增加时较慢,且2种情况下的竖井地基最终沉降值一般不再相等,沉降曲线间的差异也较大;任意深度处井周流入砂井的流量均相等的假定导致竖井地基固结速率偏快,使实际计算会过高估计竖井地基的固结速率;竖向渗流对地基固结的促进作用随竖井长度与竖井影响区半径之比的增大而减小。

关键词：土力学竖井地基大应变理论井阻效应非线性固结竖向渗流

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Diffusion and reaction mechanism of limestone and quartz in fluxed iron ore pellet roasting process

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International Journal of Minerals,Metallurgy and Materials 2024年第3期31卷 485-497页

作者： Yufeng Guo Jinlai Zhang Shuai Wang Jianjun Fan Haokun li Feng Chen kuo liu lingzhi Yang School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083China Technology Center Taiyuan Iron Steel(Group)Co.Ltd.(TISCO)Taiyuan 030003China

The increase to the proportion of fluxed pellets in the blast furnace burden is a useful way to reduce the carbon emissions in the ironmaking *** this study,the interaction between calcium carbonate and iron ore powder and the mineralization mechanism of fluxed iron ore pellet in the roasting process were investigated through diffusion couple *** electron microscopy with energy dispersive spectroscopy was used to study the elements’diffusion and phase transformation during the roasting *** results indicated that limestone decomposed into calcium oxide,and magnetite was oxidized to hematite at the early stage of *** the increase in roasting temperature,the diffusion rate of Fe and Ca was obviously accelerated,while the diffusion rate of Si was relatively *** order of magnitude of interdiffusion coefficient of Fe_(2)O_(3)-CaO diffusion couple was 10^(−10) m^(2)·s^(−1) at a roasting temperature of 1200℃for 9 ***_(2)Fe_(2)O_(5) was the initial product in the Fe_(2)O_(3)-CaO-SiO_(2) diffusion interface,and then Ca_(2)Fe_(2)O_(5) continued to react with Fe_(2)O_(3) to form CaFe_(2)O_(4).With the expansion of the diffusion region,the sillico-ferrite of calcium liquid phase was produced due to the melting of SiO_(2) into CaFe_(2)O_(4),which can strengthen the consolidation of fluxed ***,andradite would be formed around a small part of quartz particles,which is also conducive to the consolidation of fluxed *** addition,the principle diagram of limestone and quartz diffusion reaction in the process of fluxed pellet roasting was discussed.

关键词： fluxed iron ore pellet limestone hematite quartz diffusion reaction

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A Novel Framework for the SOC and SOH Co-estimation Based on AEKF and LSTM

A Novel Framework for the SOC and SOH Co-estimation Based on...

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2023中国汽车工程学会年会暨展览会

作者： li kuo Lyu Mohan li Xiaoyu School of Mechanical Engineering Hebei University of Technology State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology

With new energy vehicles gradually dominate the market,more and more attentions are paid to the safe operation and long-life cycle of battery systems,and the accurate estimation of state of charge(SOC) and state of health(SOH) are the key functions of *** this study,a novel approach for simultaneously estimating the SOC and SOH is *** estimation methods for SOC and SOH are fused the model-based and data-driven ***,an adaptive extended Kalman filter(AEKF) is applied to estimate SOC without requiring the SOH estimate update parameter,and long short-term memomy(LSTM) is utilized as the data-driven method for SOH *** the data-driven method,the health features(HFs) are extracted from the incremental capacity(IC)curves and SOC-OCV curves,and in this study,six kinds of health factors based on different requirements are ***,the proposed method is validated using a dataset with the CACLE dataset with complex conditions and the Oxford dataset,and the results indicate that the errors of SOC estimation are less than 1% and the errors of SOH are within 3.8%.The results show that the proposed framework has practical value.

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Extended context-based semantic communication system for text transmission

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Digital Communications and Networks 2024年第3期10卷 568-576页

作者： Yueling liu Shengteng Jiang Yichi Zhang kuo Cao li Zhou Boon-Chong Seet Haitao Zhao Jibo Wei College of Electronic Science and Technology National University of Defense TechnologyChangsha410073China Department of Electrical and Electronic Engineering Auckland University of TechnologyAucklandNew Zealand

Context information is significant for semantic extraction and recovery of messages in semantic ***,context information is not fully utilized in the existing semantic communication systems since re-lationships between sentences are often *** this paper,we propose an Extended Context-based Semantic Communication(ECSC)system for text transmission,in which context information within and between sentences is explored for semantic representation and *** the encoder,self-attention and segment-level relative attention are used to extract context information within and between sentences,*** addition,a gate mechanism is adopted at the encoder to incorporate the context information from different *** the decoder,Transformer-XL is introduced to obtain more semantic information from the historical communication processes for semantic *** results show the effectiveness of our proposed model in improving the semantic accuracy between transmitted and recovered messages under various channel conditions.

关键词： semantic communication extended context Transformer-XL

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Combinations of electron and proton donors in transition-metal complex mediated nitrogen reduction reactions

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Science China Chemistry 2024年第7期67卷 2136-2154页

作者： Delong Han li Yang Hao Huang Priyanka Chakraborty Shashikant U.Dighe kuo-Wei Huang KAUST Catalysis Center and Division of Physical Science and Engineering King Abdullah University of Science and TechnologyThuwal 23955Saudi Arabia Agency for Science Technologyand ResearchInstitute of Materials Research and Engineering and Institute of Sustainability for ChemicalsEnergy and EnvironmentSingapore 138634Singapore

Nitrogen fixation is a complex process involving the transfer of six electrons and *** from the conventional Haber-Bosch process,which relies on hydrogen(H_(2))to provide both electrons and protons to reduce nitrogen(N_(2)),homogeneous transition metal complex-catalyzed N_(2)reduction reactions(NRR)employ an array of electron and proton donors or even electron donors combined with *** the synthesis of diverse catalytic progress,the categories of donors have seen rapid ***,existing literature only provides summaries regarding the metal,ligands,and *** the significance of electron and proton donor combinations in nitrogen reduction reactions,no literature has thoroughly reviewed this ***,we hereby compiled a comprehensive list of commonly used reagents in N_(2)reduction and classified them according to their specific donor *** review presents clear and organized information about these combinations,along with a summary of their general performance trend in NRR with related ***,we conclude the discussion by highlighting key points for researchers to consider when selecting catalysts and donor combinations,with the ultimate goal of advancing the field of nitrogen fixation.

关键词： dinitrogen reduction reaction reducing donor combination transition metal complexes homogeneous catalysis

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