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Detection and Discrimination of Tea Plant Stresses Based on Hyperspectral Imaging Technique at a Canopy Level

Phyton-International Journal of Experimental Botany 2021年第2期90卷 621-634页

作者： lihan Cui Lijie Yan Xiaohu Zhao Lin Yuan Jing Jin Jingcheng Zhang College of Artificial Intelligence Hangzhou Dianzi UniversityHangzhou310018China Zhejiang University of Water Resources and Electric Power Hangzhou310018China Zhejiang Agricultural Technology Extension Center Hangzhou310020China

Tea plant stresses threaten the quality of tea *** technology corresponding to the fast detection and differentiation of stresses is of great significance for plant protection in tea *** recent years,hyperspectral imaging technology has shown great potential in detecting and differentiating plant diseases,pests and some other stresses at the leaf ***,the lack of studies at canopy level hampers the detection of tea plant stresses at a larger *** this study,based on the canopy-level hyperspectral imaging data,the methods for identifying and differentiating the three commonly occurred tea stresses(i.e.,the tea leafhopper,anthrax and sun burn)were *** account for the complexity of the canopy scenario,a stepwise detecting strategy was proposed that includes the process of background removal,identification of damaged areas and discrimination of ***,combining the successive projection algorithm(SPA)spectral analysis and K-means cluster analysis,the background and overexposed non-plant regions were removed from the ***,a rigorous sensitivity analysis and optimization were performed on various forms of spectral features,which yielded optimal features for detecting damaged areas(i.e.,YSV,Area,GI,CARI and NBNDVI)and optimal features for stresses discrimination(i.e.,MCARI,CI,LCI,RARS,TCI and VOG).Based on this information,the models for identifying damaged areas and those models for discriminating different stresses were established using K-nearest neighbor(KNN),Random Forest(RF)and Fisher discriminant *** identification model achieved an accuracy over 95%,and the discrimination model achieved an accuracy over 93%for all *** results suggested the feasibility of stress detection and differentiation using canopy-level hyperspectral imaging techniques,and indicated the potential for its extension over large areas.

关键词： Hyperspectral imaging technology tea plant diseases and pests sunburn spectral analysis

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A Comparative Investigation of Single Crystal and Polycrystalline Ni-Rich NCMs as Cathodes for Lithium-Ion Batteries

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Energy & Environmental Materials 2023年第3期6卷 1-7页

作者： Xianming Deng Rui Zhang Kai Zhou Ziyao Gao Wei He lihan Zhang Cuiping Han Feiyu Kang Baohua Li Shenzhen Key Laboratory of Power Battery Safety and Shenzhen Geim Graphene Center Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China EVE Energy Co. Ltd.No.38Hui Feng 7th RoadZhongkai Hi-Tech ZoneHuiZhou Guangdong 516006China Shenzhen Key Laboratory of Energy Materials for Carbon Neutrality and Faculty of Materials Science and Engineering Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China

Nickel-rich LiNi_(1-x-y)Co_(x)Mn_(y)O_(2)(NCM,1-x-y≥0.6)is known as a promising cathode material for lithium-ion batteries since its superiority of high voltage and large ***,polycrystalline Ni-rich NCMs suffer from poor cycle stability,limiting its further ***,single crystal and polycrystalline LiNi_(0.84)Co_(0.07)Mn_(0.09)O_(2)cathode materials are compared to figure out the relation of the morphology and the electrochemical storage *** to the Li^(+)diffusion coefficient,the lower capacity of single crystal samples is mainly ascribed to the limited Li+diffusion in the large *** situ XRD illustrates that the polycrystalline and single crystal NCMs show a virtually identical manner and magnitude in lattice contraction and expansion during ***,the electrochemically active surface area(ECSA)measurement is employed in lithium-ion battery study for the first time,and these two cathodes show huge discrepancy in the ECSA after the initial *** results suggest that the single crystal sample exhibits reduced cracking,surface side reaction,and Ni/Li mixing but suffers the lower Li^(+)diffusion *** work offers a view of how the morphology of Ni-rich NCM effects the electrochemical performance,which is instructive for developing a promising strategy to achieve good rate performance and excellent cycling stability.

关键词： cathodes electrochemically active surface area Li^(+)diffusion coefficient lithium-ion batteries single crystal

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Psychophysics of wearable haptic/tactile perception in a multisensory context

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Virtual Reality & Intelligent Hardware 2019年第2期1卷 185-200页

作者： Xiao LEI Tingwei ZHANG Kun CHEN Jue ZHANG Yue TIAN Fang FANG lihan CHEN School of Psychological and Cognitive Sciences and Beijing Key Laboratory of Behavior and Mental Health Peking UniversityBeijing 100871China Key Laboratory of Machine Perception(Ministry of Education) Peking UniversityBeijing 100871China Academy for Advanced Interdisciplinary Studies Peking UniversityBeijing 100871China College of Engineering Peking UniversityBeijing 100871China Peking-Tsinghua Center for Life Sciences Peking UniversityBeijing 100871China PKU-IDG/McGovern Institute for Brain Research Peking UniversityBeijing 100871China

Multisensory lab based in Peking University,has carried out basic studies in multisensory space and time processing,intersensory binding and haptic/tactile *** exploited a typical paradigm of multisensory illusion-temporal ventriloquist effect and applied it in a wide range of multisensory interactions(mainly focused on temporal processing).In this work,we summarized how the tactile stimuli were exploited to compose tactile cues and as tactile apparent motion to interface with other sensory stimuli(visual and auditory stimuli)to examine the underlying perceptual organization in a multisensory ***,we introduced two examples of wearable haptic/tactile perception in our lab,by using two customized tactile devices and discussed the potential applications in this field.

关键词： Multisensory Ventriloquism effect Wearable haptics Perceptual organization

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A covalent organic framework-based multifunctional therapeutic platform for enhanced photodynamic therapy via catalytic cascade reactions

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Science China Materials 2021年第2期64卷 488-497页

作者： lihan Cai Chunling Hu Sainan Liu Ying Zhou Maolin Pang Jun Lin State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China University of Science and Technology of China Hefei230026China School of Applied Physics and Materials Wuyi UniversityJiangmen529020China

Utilizing the unique tumor microenvironment(TME)to conduct chemical reactions for cancer treatment becomes a hot topic ***,single chemical reaction in TME is often restricted by scanty reaction substrates and slow reaction ***,the toxic substances produced by the reactions are usually not enough to kill cancer ***,using covalent organic frameworks(COFs)as the template,Au nanoparticles(Au NPs)were subsequently grown on the surface of the COF,then a thin layer of manganese dioxide(MnO2)was coated over the material,and finally hyaluronic acid(HA)was introduced to improve the *** resultant product,named COF-Au-MnO2,was involved in several processes to form cascade reactions in the ***,under hypoxic conditions,COF-Au-MnO2 could react with intratumoral H2O2 to produce O2 to enhance the type II photodynamic therapy(PDT),and Au NPs could decompose glucose to promote starving-like ***,starving-like therapy can also produce H2O2 to increase O2 ***,MnO2 can consume glutathione(GSH)to enhance the antitumor efficacy,and the released Mn2+could be used for T1-weighted magnetic resonance imaging(MRI).Both in vitro and in vivo experiments had proven excellent cancer cell killing effect and antitumor efficacy of COF-Au-MnO2via such a cycle-like process.

关键词： covalent organic framework cascade reaction tumor microenvironment enhanced photodynamic therapy

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转录组分析人工配合饲料养殖对鳜鱼肠道组织基因表达的影响

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河北渔业 2024年第5期 1-5,F0003页

作者：罗佳兴高晓田张丽晗孙砚峰吴成宾河北农业大学海洋学院河北秦皇岛066003 河北省海洋与水产科学研究院(河北省海洋渔业生态环境监测站) 河北秦皇岛066003

为探究鳜鱼(Siniperca chuatsi)肠道组织对饲料喂养的适应性,以饲料驯化30 d不吃饲料的鳜鱼和饲料驯化30 d吃饲料的鳜鱼为试验群体,基于RNA-seq技术对鳜鱼肠道组织的转录组数据进行分析。RNA-seq测序共获得41.65 Gb Clean Data, Q30碱... 详细信息

为探究鳜鱼(Siniperca chuatsi)肠道组织对饲料喂养的适应性,以饲料驯化30 d不吃饲料的鳜鱼和饲料驯化30 d吃饲料的鳜鱼为试验群体,基于RNA-seq技术对鳜鱼肠道组织的转录组数据进行分析。RNA-seq测序共获得41.65 Gb Clean Data, Q30碱基百分比在90%以上。在FDR≤0.05且︱log2FoldChange︱≥1的筛选条件下转录组测序分析共鉴定出955个差异表达基因。GO功能富集分析结果显示,差异表达基因主要在有机酸代谢过程上显著富集。KEGG通路富集分析结果显示,差异基因主要在细胞周期、PPAR信号通路等通路中被显著富集。综上所述,鳜鱼为适应饲料养殖调动了与饮食有关的信号通路基因的表达,提高鳜鱼肠道组织对人工配合饲料的消化、吸收能力。

关键词：翘嘴鳜(Siniperca chuatsi) 饲料养殖转录组

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妊娠中期罗哌卡因联合舒芬太尼麻醉对SD模型子代脑源性神经营养因子表达和认知功能的影响

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河北医学 2024年第5期30卷 773-781页

作者：底妍李立函焦姗姗张坤郝书航王金保中国人民解放军联勤保障部队第九八〇医院麻醉科河北石家庄050082

目的:探讨妊娠中期罗哌卡因联合舒芬太尼麻醉对SD模型子代脑源性神经营养因子表达和认知功能的影响。方法:本研究假设怀孕期间的母体跑步机运动可以防止罗哌卡因联合舒芬太尼引起的神经毒性。在第一个实验中,怀孕大鼠在妊娠(G)第14天暴... 详细信息

目的:探讨妊娠中期罗哌卡因联合舒芬太尼麻醉对SD模型子代脑源性神经营养因子表达和认知功能的影响。方法:本研究假设怀孕期间的母体跑步机运动可以防止罗哌卡因联合舒芬太尼引起的神经毒性。在第一个实验中,怀孕大鼠在妊娠(G)第14天暴露于舒芬太尼(0.25μg/μL)+罗哌卡因(0.125μg/μL)混合液100μL(R&G),或在G13,G14和G15上连续暴露(R&Gx3)。在第二个实验中,运动组的怀孕大鼠在整个怀孕期间被迫在跑步机上每天跑60min。TrkB拮抗剂ANA-12被用来研究脑源性神经营养因子(brain-derived neurotrophic factor,BDNF)/TrkB信号通路是否参与了母亲运动所提供的神经保护。结果:重复而非单一暴露于罗哌卡因联合舒芬太尼会导致胎儿脑组织和出生后海马中组蛋白乙酰化和BDNF表达的降低。伴随着树突棘数量的减少,空间依赖性学习和记忆功能障碍受损。母体运动减轻了这些影响,但TrkB拮抗剂ANA-12消除了母体运动的有益影响。结论:妊娠大鼠在妊娠中期多次(而非单次)接触罗哌卡因联合舒芬太尼会导致后代长期学习和记忆功能障碍。母体运动通过增强组蛋白乙酰化和激活下游BDNF/TrkB信号传导以改善产后神经认知障碍。

关键词：妊娠中期罗哌卡因舒芬太尼脑源性神经营养因子认知功能

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Two-in-one solution using insect wings to produce graphene-graphite films for efficient electrocatalysis

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Nano Research 2019年第1期12卷 33-39页

作者： Huaiyu Li lihan Zhang Long Li Chaowen Wu Yajiao Huo Ying Chen Xijun Liu Xiaoxing Ke Jun Luo Gustaaf Van Tendeloo Center for Electron Microscopy TUT-FEI Joint LabTianjin Key Lab of Advanced Functional Porous MaterialsInstitute for New Energy Materials&Low-Carbon TechnologiesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China Institute of Microstructure and Property of Advanced Materials Beijing University of TechnologyBeijing 100124China EMAT Electron Microscopy for Materials ScienceUniversity of AntwerpGroenenborgerlaan 171B-2020 AntwerpBelgium Nanostructure Research Centre Wuhan University of TechnologyWuhan 430070China

Natural organisms contain rich elements and naturally optimized smart structures,both of which have inspired various innovative concepts and desig ns in human *** particular,several natural organisms have been used as element sources to synthesize low-cost and environmentally friendly electrocatalysts for the oxygen reduction reaction(ORR)in fuel cells and metal-air batteries,which are clean energy ***,to date,no naturally optimized smart structures have been employed in the synthesis of ORR catalysts,including graphene-based ***,we demonstrate a novel strategy to synthesize graphene-graphite films(GGFs)by heating butterfly wings coated with FeCI3 in N2,in which the full power of natural organisms is *** wings work not only as an element source for GGF generation but also as a porous supporting structure for effective nitrogen doping,two-dimensional spreading,and double-face exposure of the *** GGFs exhibit a half-wave potential of 0.942 V and a H2O2 yield of<0.07%for ORR electrocatalysis;these values are comparable to those for the best commercial Pt/C and all previously reported ORR catalysts in alkaline *** two-in-one strategy is also successful with cicada and dragonfly wings,indicating that it is a universal,green,and cost-effective method for developing high-performance graphene-based materials.

关键词： insect wings graphene graphite oxygen reduction reaction electrocatalysts

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以大学生创新创业训练项目为依托的科研创新型公共卫生人才培养的探索及思考

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黑龙江医学 2024年第1期48卷 62-64页

作者：梁力汉姚梦迪钟泽培毛钰蘅田泽众杨燕中山大学公共卫生学院(深圳) 广东深圳518107

在新的战略背景下,公共卫生领域的发展对现今公共卫生人才的创新能力提出了更高要求。目前,高校公共卫生与预防医学的本科教育,在目标取向、创新意识、创新实践训练、激励机制等方面存在诸多问题,严重影响公共卫生创新型人才的培养。为... 详细信息

在新的战略背景下,公共卫生领域的发展对现今公共卫生人才的创新能力提出了更高要求。目前,高校公共卫生与预防医学的本科教育,在目标取向、创新意识、创新实践训练、激励机制等方面存在诸多问题,严重影响公共卫生创新型人才的培养。为此,中山大学公共卫生学院(深圳)围绕大学生创新创业训练项目,以提高人才培养质量为核心,从创新实践氛围的营造、教师端与学生端的创新意愿和能力的培养、支撑条件和政策保障的完善等方面锐意改革,并取得了一定的成果和经验,为学生创新能力的培养提供了一些新的探索和思考。

关键词：公共卫生本科生科研创新人才培养大学生创新创业训练项目

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Analysis on Adaptability of Porous Asphalt Mixture to Heavy Duty Asphalt Pavements

Analysis on Adaptability of Porous Asphalt Mixture to Heavy ...

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ISAP2012重载沥青路面和桥面铺装专题会议

作者： Haoyang wang lihan Li Fujian Ni Transportation College Southeast University Key Laboratory of Road and Traffic Engineering of the Ministry of Education Tongji University TransportationCollege SoutheastUniversity

＜正＞Whether porous asphalt mixture（OGFC mixture） is applicable to heavy traffic load has been a main topic of much *** resistance and sensitivity of OGFC are analyzed by using Asphalt Pavement Analyzer（APA） rutting test,anti-stripping performance and water stability of OGFC are evaluated by scattering test and freeze-thaw splitting strength test *** the test of OGFC,three different gradations and nine kinds of asphalts are ***,SMA is chosen as a reference *** test results show that the rutting depth of OGFC is slightly bigger than that of SMA using the indicator of APA rutting test,

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Comprehensive Leakproof Measures for Pancreaticoduodenectomy：A Report of 128 Consecutive Operations Without Pancreatic Leak

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美国中华临床医学杂志 2003年第4期5卷 259-261页

作者： lihan-Xian DepartmentofSurgicalOntology TheFirstAffiliatedHospitalNanhuaUniversityHengyangHunan421001China

MeSHpancreaticoduodenectomy;pancreatic anastomotic leak; fistula of pancreas;periampullary carcinoma; jaundice complicationcarcinoma of pancreas;ABSTRACY Object To prevent pancreatic anastomotic leak by the comprehensive leakproof measures for pancre-aticoduodenectomy. Methods From December 1981 to June 2002, 128 consecutive patients underwent pancreati-coduodenectomy. 127 cases suffered from the malignant disease and one from chronic pancreatitis. The author performedthe operations and adopted the comprehensive measures to prevent pancreatic anastomotic leak. The measures were

关键词：胰腺瘘防漏措施胰腺外科胰腺疾病胰腺吻合口漏

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