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黔中喀斯特高背景土壤-辣椒系统重金属含量特征及生态风险评价

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环境化学 2024年第6期43卷 1871-1880页

作者：曾宪平万继磊李密湛天丽文锡梅遵义市农村发展服务中心遵义563000 贵州省宸铭鑫农业科技有限公司贵阳551400 贵州省山地资源研究所贵阳550001 中国科学院地球化学研究所贵阳550001

贵州喀斯特地区碳酸盐岩广泛分布,土壤重金属含量显著高于其他地区.人为干扰前,土壤重金属处于高背景低活性的状态.为了解贵州喀斯特地区耕地土壤和种植辣椒的重金属含量及其生态风险.本研究以清镇市辣椒产地土壤为研究对象,采用潜在生... 详细信息

贵州喀斯特地区碳酸盐岩广泛分布,土壤重金属含量显著高于其他地区.人为干扰前,土壤重金属处于高背景低活性的状态.为了解贵州喀斯特地区耕地土壤和种植辣椒的重金属含量及其生态风险.本研究以清镇市辣椒产地土壤为研究对象,采用潜在生态风险指数法和生物富集法对土壤和辣椒重金属含量及其生态风险进行评价.结果表明,清镇市耕地土壤重金属Cd、Hg、As、Pb和Cr含量平均值分别为0.75、0.74、111.85、33.50、109.62 mg·kg^(−1),Cd和As含量平均值分别是国家标准GB5618—2018的2.25倍和2.79倍,土壤重金属Cd、As和Hg存在显著正相关.清镇市辣椒产地土壤重金属综合潜在生态风险指数RI呈轻微风险水平,各乡镇差异较大(51.13—228.59).辣椒对5种重金属的富集系数均小于1,对5种重金属吸收能力较弱.辣椒重金属Cd与土壤pH呈显著负相关.建议当地农户耕作过程中注意土壤重金属的污染来源,重点关注土壤重金属污染的累积风险.

关键词：喀斯特辣椒种植土壤重金属潜在生态分析

基于“城市针灸”方法的存量公房活化模式研究——以广州市为例

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热带地理 2024年第7期44卷 1249-1262页

作者：王建军陈作任周小天詹美旭广州市城市规划勘测设计研究院广州510060 广州市资源规划和海洋科技协同创新中心广州510060 广东省城市感知与监测预警企业重点实验室广州510060

在存量时代发展要求下,公房的管理使用成为广州实施城市更新过程中必须面对的挑战。文章回顾了国内外公房更新改造实践经验和“城市针灸”研究进展,结合广州实际情况选取老城区6个较具代表性的公房集聚区开展田野调查与深度访谈,探讨存... 详细信息

在存量时代发展要求下,公房的管理使用成为广州实施城市更新过程中必须面对的挑战。文章回顾了国内外公房更新改造实践经验和“城市针灸”研究进展,结合广州实际情况选取老城区6个较具代表性的公房集聚区开展田野调查与深度访谈,探讨存量公房如何实现有效活化利用的更新难题。结果表明:1)公房对租户的住房保障作用至关重要,尽管面临诸多现实困难,租户仍表现出强烈的社区归属感和邻里信任感,且认可公房的使用价值。2)在系统总结了翻新出售、功能转换和民生保障3种活化模式的基础上,提出广州的公房活化利用“以民生保障为主,其次是功能转换,最后才是翻新出售”。3)在实证基础上,文章回归关注“城市的人”,在人本主义视角、地理学范畴内进一步总结提炼基于“城市针灸”方法的存量公房活化模式分析框架,提出存量公房分类评价综合评估模型,用于判别公房的活化模式类型,并探讨了活化利用实施路径的4个步骤:查找问题,精准诊断;以人为本,点出“穴位”;“穴位”活化,以点带面;良性互动,循环渐进。

关键词：存量公房城市针灸城市更新城市体检盘活利用广州

Amplitude analysis of the decays D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)

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Chinese Physics C 2024年第8期48卷 6-33页

作者： M.Ablikim M.N.Achasov P.Adlarson O.Afedulidis X.C.Ai R.Aliberti A.Amoroso Q.An Y.Bai O.Bakina I.Balossino Y.Ban H.-R.Bao V.Batozskaya K.Begzsuren N.Berger M.Berlowski M.Bertani D.Bettoni F.Bianchi E.Bianco A.Bortone I.Boyko R.A.Briere A.Brueggemann H.Cai X.Cai A.Calcaterra G.F.Cao N.Cao S.A.Cetin j.F.Chang w.L.Chang G.R.Che G.Chelkov C.Chen C.H.Chen Chao Chen G.Chen H.S.Chen M.L.Chen S.j.Chen S.L.Chen S.M.Chen T.Chen X.R.Chen X.T.Chen Y.B.Chen Y.Q.Chen Z.j.Chen Z.Y.Chen S.K.Choi X.Chu G.Cibinetto F.Cossio j.j.Cui H.L.Dai j.P.Dai A.Dbeyssi R.E.de Boer D.Dedovich C.Q.Deng Z.Y.Deng A.Denig I.Denysenko M.Destefanis F.De Mori B.Fang S.S.Fang w.X.Fang Y.Fang Y.Q.Fang R.Farinelli L.Fava F.Feldbauer G.Felici C.Q.Feng j.H.Feng Y.T.Feng K.Fischer M.Fritsch C.D.Fu j.L.Fu Y.w.Fu H.Gao Y.N.Gao Yang Gao S.Garbolino I.Garzia P.T.Ge Z.w.Ge C.Geng E.M.Gersabeck B.Ding X.X.Ding Y.Ding Y.Ding j.Dong L.Y.Dong M.Y.Dong X.Dong M.C.Du S.X.Du Z.H.Duan P.Egorov Y.H.Fan j.Fang jA.Gilman K.Goetzen L.Gong w.X.Gong w.Gradl S.Gramigna M.Greco M.H.Gu Y.T.Gu C.Y.Guan Z.L.Guan A.Q.Guo L.B.Guo M.j.Guo R.P.Guo Y.P.Guo A.Guskov j.Gutierrez K.L.Han T.T.Han X.Q.Hao F.A.Harris K.K.He K.L.He F.H.Heinsius C.H.Heinz Y.K.Heng C.Herold T.Holtmann P.C.Hong G.Y.Hou X.T.Hou Y.R.Hou Z.L.Hou B.Y.Hu H.M.Hu j.F.Hu T.Hu Y.Hu G.S.Huang K.X.Huang L.Q.Huang X.T.Huang Y.P.Huang T.Hussain F.H\"olzken N.H\"usken N.in der wiesche M.Irshad j.jackson S.janchiv j.H.jeong Q.ji Q.P.ji w.ji X.B.ji X.L.ji Y.Y.ji X.Q.jia Z.K.jia D.jiang H.B.jiang P.C.jiang S.S.jiang T.j.jiang X.S.jiang Y.jiang j.B.jiao j.K.jiao Z.jiao S.jin Y.jin M.Q.jing X.M.jing T.johansson S.Kabana N.Kalantar-Nayestanaki X.L.Kang X.S.Kang M.Kavatsyuk B.C.Ke V.Khachatryan A.Khoukaz R.Kiuchi O.B.Kolcu B.Kopf M.Kuessner X.Kui A.Kupsc w.K\"uhn j.j.Lane P.Larin L.Lavezzi T.T.Lei Z.H.Lei H.Leithoff M.Lellmann T.Lenz C.Li C.Li C.H.Li Cheng Li D.M.Li F.Li G.Li H.Li H.B.Li H.j.Li H.N.Li Hui Li j.R.Li j.S.Li K.Li L.j.Li L.K.Li Lei Li M.H.Li P.R.Li Q.M.Li Q.X.Li R.Li S.X.Li T.Li w.D.Li w.G.Li X.Li X.H.Li X.L.Li X.Y.Li Y Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Beihang University Beijing 100191China Bochum Ruhr-University D-44780 BochumGermany Budker Institute of Nuclear Physics SB RAS(BINP) Novosibirsk 630090Russia Carnegie Mellon University PittsburghPennsylvania 15213USA Central China Normal University Wuhan 430079China Central South University Changsha 410083China China Center of Advanced Science and Technology Beijing 100190China China University of Geosciences Wuhan 430074China Chung-Ang University Seoul06974Republic of Korea COMSATS University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan Fudan University Shanghai 200433China GSI Helmholtzcentre for Heavy Ion Research GmbH D-64291 DarmstadtGermany Guangxi Normal University Guilin 541004China Guangxi University Nanning 530004China Hangzhou Normal University Hangzhou 310036China Hebei University Baoding 071002China Helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany Henan Normal University Xinxiang 453007China Henan University Kaifeng 475004China Henan University of Science and Technology Luoyang 471003China Henan University of Technology Zhengzhou 450001China Huangshan College Huangshan 245000China Hunan Normal University Changsha 410081China Hunan University Changsha 410082China Indian Institute of Technology Madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA INFN Laboratori Nazionali di Frascati INFN Laboratori Nazionali di FrascatiI-00044FrascatiItaly INFN Laboratori Nazionali di Frascati INFN Sezione di PerugiaI-06100PerugiaItaly INFN Laboratori Nazionali di Frascati University of PerugiaI-06100PerugiaItaly INFN Sezione di Ferrara INFN Sezione di FerraraI-44122FerraraItaly INFN Sezione di Ferrara University of FerraraI-44122FerraraItaly Inner Mongolia University Hohhot 010021China Institute of Modern Physics Lanzhou 730000China Institute of Physics and Technology Peace Avenue 54BUlaanbaatar 13330Mongolia Instituto de A

Using e^(+)e^(−)annihilation data corresponding to an integrated luminosity of 2.93 fb^(−1)taken at the center-of-mass energy√s=3.773 GeV with the BESIII detector,a joint amplitude analysis is performed on the decays D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η).The fit fractions of individual components are obtained,and large interferences among the dominant components of the decays D^(0)→a_(1)(1260)π,D^(0)→π(1300)π,D^(0)→ρ(770)ρ(770),and D^(0)→2(ππ)_(S)are observed in both *** the obtained amplitude model,the CP-even fractions of D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η)are determined to be(75.2±1.1_(stat).±1.5_(syst.))%and(68.9±1.5_(stat).±2.4_(syst.))%,*** branching fractions of D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η)are measured to be(0.688±0.010_(stat.)±0.010_(syst.))%and(0.951±0.025_(stat.)±0.021_(syst.))%,*** amplitude analysis provides an important model for the binning strategy in measuring the strong phase parameters of D^(0)→4πwhen used to determine the CKM angleγ(ϕ_(3))via the B^(−)→DK^(−)decay.

关键词： BESIII D^(0)meson decays amplitude analysis CP-even fraction

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周年生物钟:赋予动物预知季节的能力

Science Bulletin 2024年第12期69卷 1839-1843页

作者：陈君凤吴蔚龙娟刘鑫 David Hazlerigg 詹祥江 Key Laboratory of Animal Ecology and Conservation Biology Institute of ZoologyChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Arctic Seasonal Timekeeping Initiative(ASTI) Department of Arctic and Marine Biology UiTThe Arctic University of NorwayTromsø9037Norway Cardiff University-Institute of Zoology joint Laboratory for Biocomplexity Research Chinese Academy of SciencesBeijing 100101China Center for Excellence in Animal Evolution and Genetics Chinese Academy of SciencesKunming 650223China

Seasonal changes in climate and animal behaviors have been depicted in Chinese literature since ancient times,such as the classical poem"HuìChóng Ch-un jiang wǎn jǐng"by Su *** now know that the intricate interpla... 详细信息

关键词： periodic behaviors 生物钟

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带宽化调节下的抗扰PID退饱和控制方法

控制理论与应用 2024年第1期41卷 83-89页

作者：聂卓赟聂方明陈一逢詹瑜坤罗继亮华侨大学信息科学与工程学院福建厦门361000 厦门市爱维达电子有限公司福建厦门361000 鹤壁产业技术研究院河南鹤壁458000

比例–积分–微分(PID)控制的抗饱和设计是一类经典非线性控制问题,理论研究丰富,但工程中广泛使用的仍是积分退饱和这类简易策略.究其原因,现有理论方法过于依赖系统模型和状态空间理论,稳定性条件与调参机制之间关系复杂.本文基于经... 详细信息

比例–积分–微分(PID)控制的抗饱和设计是一类经典非线性控制问题,理论研究丰富,但工程中广泛使用的仍是积分退饱和这类简易策略.究其原因,现有理论方法过于依赖系统模型和状态空间理论,稳定性条件与调参机制之间关系复杂.本文基于经典退饱和控制结构,首次阐述了“退饱和带宽”概念及退饱和参数调节机理,在此基础上讨论了两类低阶退饱和补偿器的带宽化设计方法.在抗扰PID反馈控制下,结合小增益定理得到退饱和控制的稳定性条件,给出控制参数与退饱和带宽之间的调节关系,实现退饱和控制的带宽化整定.最后,通过数值仿真验证了所提方法的有效性.

关键词：退饱和控制退饱和带宽抗扰PID

Triple bottom-line consideration of sustainable plant disease management:From economic,sociological and ecological perspectives

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journal of Integrative Agriculture 2021年第10期20卷 2581-2591页

作者： HE Dun-chun jeremy j.BURDON XIE Lian-hui jiasui zhan Institute of Eco-technological Economics School of Economics and TradeFujian Jiangxia UniversityFuzhou 350108P.R.China Fujian Key Lab of Plant Virology Institute of Plant VirologyFujian Agriculture and Forestry UniversityFuzhou 350002P.R.China CSIRO Agriculture CanberraA.C.T.2601Australia Department of Forest Mycology and Plant Pathology Swedish University of Agricultural SciencesUppsala 75007Sweden

Plant disease management plays an important role in achieving the sustainable development goals of the United Nations(UN)such as food security,human health,socio-economic improvement,resource conservation and ecological ***,technologies available are often limited due to different interests between producers and society and lacks of proper understanding of economic thresholds and the complex interactions among ecology,productivity and profitability.A comprehensive synergy and conflict evaluation of economic,sociological and ecological effects with technologies,productions and evolutionary principles as main components should be used to guide sustainable disease management that aims to mitigate crop and economic losses in the short term while maintaining functional farm ecosystem in the long ***,there should be an increased emphasis on technology development,public education and information exchange among governments,researchers,producers and consumers to broaden the options for disease management in the future.

关键词： plant disease management agricultural sustainability disease economics food security resource conservation

Nanocrystal Model for Liquid Metals and Amorphous Metals

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journal of Materials Science & Technology 2010年第1期26卷 69-74页

作者： X.L. Tian, C.w. zhan, j.X. Hou, X.C. Chen and j.j. Sun Key Laboratory of Liquid Structure and Heredity of Materials, Ministry of Education, Shandong University, jinan 250061, China Key Laboratory of Liquid Structure and Heredity of Materials Ministry of Education Shandong University Jinan 250061 China

A nanocrystal model for liquid metals and amorphous metals has been developed. with the nanocrystal model, the broadening peak profiles （BPPs） of Cu, Al, Al65Cu20Fe15 alloy, Cu7oNi30 alloy and Fe50Si50 alloy were gained by broadening the X-ray diffraction （XRD） peaks of a crystal lattice. By comparing the BPPs with the XRD intensity curves measured on the liquid metals, it is found that the BPPs are closely in agreement with the XRD intensity curves, respectively, except the FesoSiso alloy. Therefore, the nanocrystal model can be used to determine if the atomic cluster structure of the liquid metal is similar to the structure of its crystal lattice.

关键词： Liquid metal Atomic cluster Structure Crystal lattice

A Review on Ultrasonic-Assisted Forming:Mechanism,Model,and Process

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Chinese journal of Mechanical Engineering 2021年第5期34卷 147-170页

作者： Guangda Shao Hongwei Li Mei zhan Shaanxi Key Laboratory of Precision Forming Technology and Equipment School of Materials Science and Engineering Northwestern Polytechnical University Xi’an China

Compared with conventional forming processes,ultrasonic-assisted forming technology with a high frequency and small amplitude can significantly improve the forming quality of *** to the advantages of reduced forming force,improved surface quality,avoidance of forming defects,and strengthened surface structure,ultrasonic-assisted forming technology has been applied to increasingly advanced forming processes,such as incremental forming,spinning,and ***,in the ultrasonic-assisted forming process,there are multiple ultrasonic mechanisms,such as the volume effect and surface *** explanation of the effect of ultrasonic vibration(UV)on plastic deformation remains controversial,hindering the development of related ***,many researchers have proposed many new theories and technologies for ultrasonic-assisted *** summarize these developments,systematic discussions on mechanisms,theoretical models,and forming performances are provided in this *** this basis,the limitations of the current study are *** addition,an outlook for ultrasonic-assisted forming is proposed:efficient and stable UV systems,difficulty forming components with complex geometry,explanation of the in-depth mechanism,a systematic theoretical prediction model,and multi-field-coupling energy-assisted forming are considered to be hot spots in future *** present review enhances existing knowledge of ultrasonic-assisted forming,and facilitates a fast reference for related researchers.

关键词： Ultrasonic vibration Forming Mechanism Model Processing performance

Accurate analysis of limiting human dose of non-lethal laser weapons

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Defence Technology（防务技术） 2022年第4期18卷 678-688页

作者： Chen-yang Lyu Ren-jun zhan College of Equipment Management and Support Chinese People’s Armed Police Force Engineering UniversityXi’an710086ShaanxiChina

In order to maximize the lethality and reversibility of the non-lethal laser weapons(NLLw) at the same time and thus provide a theoretical basis for the R&D of laser weapons in the future,this paper accurately analyzed the limiting biological dose of irreversible damage to human skin caused by the ***,based on the burn theory in medicine and the actual tactical background,this paper redefines the evaluation criteria of the limiting laser dose of NLLw to the human ***,on the basis of anatomical knowledge,a 5-layer finite element model(FEM) of superficial skin is proposed,constructed and verified,which can accurately describe the limiting reversible *** on the optimized Pennes bioheat transfer equation,the diffusion approximation theory,the modified Beer-Lambert law,the Arrhenius equation,and combined with dynamic thermophysical parameters,this paper highly restored the temperature distribution and accurately solved the necrotic tissue distribution inside the human skin irradiated by 1064 nm ***,it is concluded that the maximum human dose of the1064 nm NLLw is 8.93 j/cm^(2),8.29j/cm^(2),and 8.17 j/cm^(2) when the light spots are 5 mm,10 mm and15 mm,respectively,and the corresponding output power of the weapon is 46.74 w,173.72 w and384.77 ***,the temperature and damage distribution in the tissue at the time of ultimate damage are discussed from the axial and radial dimensions,*** conclusions and analysis methods proposed in this paper are of great guiding significance for future research in military,medical and many other related fields.

关键词： Laser weapon Non-lethal Limit dose Tissue optics Bioheat transfer Finite element