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Analyzing Changes in Maize Leaves Orientation due to GxExM Using an Automatic Method from RGB Images

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Plant Phenomics 2023年第2期5卷 239-252页

作者： Mario Serouart Raul Lopez-Lozano gaëtan Daubige Maëva Baumont Brigitte Escale Benoit De Solan Frédéric Baret Arvalis Institut du végétal228route de l’aérodrome-CS 4050984914 Avignon Cedex 9France INRAE Avignon UniversitéUMR EMMAHUMT CAPTE228route de l’aérodrome-CS 4050984914 Avignon Cedex 9France Arvalis Ecophysiology21 Chemin de Pau64121 MontardonFrance

The sowing pattern has an important impact on light interception efficiency in maize by determining the spatial distribution of leaves within the *** orientation is an important architectural trait determining maize canopies light *** studies have indicated how maize genotypes may adapt leaves orientation to avoid mutual shading with neighboring plants as a plastic response to intraspecific *** goal of the present study is 2-fold:firstly,to propose and validate an automatic algorithm(Automatic Leaf Azimuth Estimation from Midrib detection[ALAEM])based on leaves midrib detection in vertical red green blue(RGB)images to describe leaves orientation at the canopy level;and secondly,to describe genotypic and environmental differences in leaves orientation in a panel of 5 maize hybrids sowing at 2 densities(6 and 12 plants.m^(−2))and 2 row spacing(0.4 and 0.8 m)over 2 different sites in southern *** ALAEM algorithm was validated against in situ annotations of leaves orientation,showing a satisfactory agreement(root mean square[RMSE]error=0.1,R^(2)=0.35)in the proportion of leaves oriented perpendicular to rows direction across sowing patterns,genotypes,and *** results from ALAEM permitted to identify significant differences in leaves orientation associated to leaves intraspecific *** both experiments,a progressive increase in the proportion of leaves oriented perpendicular to the row is observed when the rectangularity of the sowing pattern increases from 1(6 plants.m^(−2),0.4 m row spacing)towards 8(12 plants.m^(−2),0.8 m row spacing).Significant differences among the 5 cultivars were found,with 2 hybrids exhibiting,systematically,a more plastic behavior with a significantly higher proportion of leaves oriented perpendicularly to avoid overlapping with neighbor plants at high *** in leaves orientation were also found between experiments in a squared sowing pattern(6 plants.m^(−2),0.4 m

关键词： cultivar spacing pattern

Texture development and grain boundary phase formation in Ce-and Ce-La-substituted Nd-Fe-B magnets during hot-deformation process

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Journal of Materials Science & Technology 2022年第31期126卷 71-79页

作者： ga-Yeong Kim Tae-Hoon Kim Hee-Ryoung Cha Sang-hyub Lee Dong-Hwan Kim Yang-Do Kim Jung-Goo Lee Department of Magnetic Materials Korea Institute of Materials ScienceChangwon 51508Republic of Korea Department of Materials Science and Engineering Pusan National UniversityBusan 46241Republic of Korea R&D Center Star Group Ind.Co.Ltd.Daegu 42714Republic of Korea

In this study,the influence of Ce-and Ce-La-substitution for Nd in Nd-Fe-B magnets on their magnetic and microstructural changes in the course of the hot-deformation process was investigated to gain insight into further reducing the Nd content in fine-grained Nd-Fe-B hot-deformed *** found that the[001]texture and microstructure of the RE-rich grain boundary phases,which are the factors that de-termine the remanence and coercivity of hot-deformed magnets,were deteriorated by the Ce-and *** is because the volume fraction of the RE-rich liquid formed in the grain boundaries during the hot-press and hot-deformation decreased due to the Ce-and Ce-La-substitution,thereby in-creasing the friction between the 2:14:1 grains while the c-axes of grains were aligned by grain rotation and decreasing the RE concentration of grain boundary *** particular,the Ce-La-co-substitution further prevented the liquid formation within the grain boundaries of the magnets during hot-press and hot-deformation because the wettability of the RE-rich liquid on the 2:14:1 grains became poor when La was substituted for Nd in the 2:14:1 *** results indicate that there is room for further im-provement in both the remanence and coercivity of the Ce-and Ce-La-substituted magnets by intro-ducing additional liquid into the grain boundaries prior to hot-press and *** applying the Nd-Cu infiltration process to the melt-spun ribbons(intermediate infiltration,I-infiltration),both the remanence and coercivity of the Nd-saving(Nd 0.7 Ce 0.3)-Fe-B and(Nd 0.7 Ce 0.225 La 0.075)-Fe-B hot-deformed magnets were successfully improved.

关键词： Nd-Fe-B magnets Hot-deformation Nd-saving Ce-substitution La-substitution Infiltration

心理韧性和家庭支持在肺癌患者围手术期恐惧与焦虑症状间的中介效应

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医学新知 2024年第3期34卷 251-259页

作者：时嘎郑晓景赖翠萍胡思雅李钰泉中山大学孙逸仙纪念医院手术室广州510120

目的分析心理韧性和家庭支持在肺癌患者围手术期恐惧与焦虑症状间的中介效应。方法纳入2021年1月至2023年4月中山大学孙逸仙纪念医院收治的225例肺癌围手术期患者作为研究对象,采用一般资料调查量表、心理韧性评定量表、领悟社会支持量... 详细信息

目的分析心理韧性和家庭支持在肺癌患者围手术期恐惧与焦虑症状间的中介效应。方法纳入2021年1月至2023年4月中山大学孙逸仙纪念医院收治的225例肺癌围手术期患者作为研究对象,采用一般资料调查量表、心理韧性评定量表、领悟社会支持量表、外科手术恐惧问卷、状态-特质焦虑量表进行问卷调查,采用Pearson相关性分析心理韧性、家庭支持及手术恐惧与焦虑症状的相关性,采用Process的Model 6分析心理韧性及家庭支持在肺癌患者围手术期恐惧与焦虑症状的中介效应。结果研究纳入220例肺癌患者,焦虑症状得分为(49.22±10.17)分。不同年龄、受教育年限、肿瘤分期、心理韧性及家庭支持得分的患者的焦虑症状得分差异有统计学意义(P<0.05)。焦虑症状得分与恐惧得分呈正相关(r=0.85,P<0.05),与心理韧性(r=-0.90,P<0.05)及家庭支持得分(r=-0.81,P<0.05)呈负相关。链式中介效应分析显示,围手术期恐惧→心理韧性→焦虑症状的效应值为0.36,占总效应的63.54%,占总间接效应的75.30%,间接效应1成立(P=0.0214);围手术期恐惧→家庭支持→焦虑症状的效应值为0.06,占总效应的11.21%,占总间接效应的13.29%,间接效应2成立(P=0.0013);围手术期恐惧→心理韧性→家庭支持→焦虑症状的效应值为0.05,占总效应的9.63%,占总间接效应的11.41%,间接效应3成立(P=0.0025)。结论肺癌患者围手术期表现出较为显著的焦虑症状,心理韧性和家庭支持在肺癌患者围手术期恐惧与焦虑症状间存在链式中介效应,临床医护人员可以根据围手术期恐惧影响焦虑症状的路径,促进患者的心理韧性和家庭支持,改善肺癌患者焦虑症状。

关键词：肺癌心理韧性家庭支持围手术期恐惧中介效应

微量元素锌对奶牛生产性能的影响及富锌牛奶生产研究进展

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饲料研究 2024年第1期47卷 171-174页

作者：张楠白雅芳刘高飞杜斌万国辉雷凤东扎拉嘎内蒙古圣牧高科牧业有限公司内蒙古呼和浩特010000 北京京瓦农业科技创新中心北京100081

锌元素作为动物体内的必需微量元素,在奶牛生理代谢及生产实践中具有重要的作用。日粮中添加适量锌能够在保障奶牛健康的前提下提升牛奶的品质。文章阐述了日粮中添加不同形式的锌对奶牛生产性能、乳锌含量及健康的影响,讨论奶牛锌推荐... 详细信息

锌元素作为动物体内的必需微量元素,在奶牛生理代谢及生产实践中具有重要的作用。日粮中添加适量锌能够在保障奶牛健康的前提下提升牛奶的品质。文章阐述了日粮中添加不同形式的锌对奶牛生产性能、乳锌含量及健康的影响,讨论奶牛锌推荐饲喂量、富锌牛奶标准,为锌元素在奶牛生产中的应用、生产富含锌牛奶提供参考。

关键词：锌奶牛生产性能富锌牛奶

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西藏扎日南木措流域水环境特征及其影响因素

环境科学 2024年第8期45卷 4529-4539页

作者：李志龙张惠芳刘长兵陈旭索娜卓嘎德吉央宗周云桥牛学锐董慧科王小萍兰州大学资源环境学院兰州730000 西藏自治区生态环境监测中心拉萨850000 中国科学院青藏高原研究所青藏高原地球系统与资源环境全国重点实验室北京100101

扎日南木措位于藏西北高寒草原带,为西藏第三大湖,生态环境脆弱,长期以来其流域水环境的研究资料缺乏,为探究其流域地表水环境特征及影响因素,于2021年8月~2022年6月丰、枯、平水期对流域湖泊和入湖河流水环境进行调查,结合数理统计以... 详细信息

扎日南木措位于藏西北高寒草原带,为西藏第三大湖,生态环境脆弱,长期以来其流域水环境的研究资料缺乏,为探究其流域地表水环境特征及影响因素,于2021年8月~2022年6月丰、枯、平水期对流域湖泊和入湖河流水环境进行调查,结合数理统计以及水化学分析、相关分析和主成分分析等方法,对流域水化学特征进行了评价,分析了水质时空差异特征,并对水质影响因素进行了探讨.结果表明:①扎日南木措流域水体呈碱性,湖水离子组成以Na^(+)、SO_(4)^(2-)和Cl^(-)为主,河流以Ca^(2+)、HCO_(3)~-和SO_(4)^(2-)为主.②硫酸盐、砷、氯化物和总磷为主要超标污染物,流域水质存在明显时空差异.时间上,硫酸盐、砷和总磷超标均表现为:丰水期>枯水期>平水期,氯化物的水期差异不明显;空间上,河流水质优于湖泊,湖泊中砷、总磷、TDS、硫酸盐、氯化物、K^(+)和Na^(+)的浓度较河流高1~2个数量级,水质超标现象基本集中于湖区,而湖内水质空间差异小.③流域水化学过程主要受蒸发-浓缩和岩石风化下的自然过程控制,各类元素经地表径流进入湖泊后,在蒸发浓缩作用下不断富集最后产生超标.④水质时间差异主要是丰水期更多的元素淋失和更强烈的蒸发作用导致;而空间差异则主要是流动水体和封闭水体的水动力条件差异导致.

关键词：扎日南木措水化学特征时空差异影响因素主成分分析

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高校跨文化教育学生思政全过程育人的探索

教育教学论坛 2024年第27期 177-180页

作者：霍春艳敖日嘎钱蓉蓉姜楠北京农学院国际学院北京102206 北京农学院国际合作与交流处北京102206

随着世界多极化形势的变化以及教育部实施“三全育人”综合改革工作总体目标的要求,跨文化教育“三全育人”相关工作面临着诸多新的形势。从跨文化教育中学生思政工作面临的挑战入手,跨文化环境下学生思政工作的侧重点应以爱国主义教育... 详细信息

随着世界多极化形势的变化以及教育部实施“三全育人”综合改革工作总体目标的要求,跨文化教育“三全育人”相关工作面临着诸多新的形势。从跨文化教育中学生思政工作面临的挑战入手,跨文化环境下学生思政工作的侧重点应以爱国主义教育为引领,以培养诚实守信品德、担当协作精神、跨文化适应能力提升为核心;并总结多年办学实际提出了适应中外合作办学项目的全过程思政工作体系,对高校中外合作办学模式下的学生思政全过程育人进行了积极探索。

关键词：跨文化教育大学生思想政治全过程育人

A Note on Solutions for Asymptotically Linear Elliptic Systems

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Acta Mathematicae Applicatae Sinica 2008年第3期24卷 511-522页

作者： Lei-ga Zhao Department of Mathematics Beijing University of Chemical Technology 100029 Beijing China Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 China Department of Mathematics Yunnan Normal University Kunming 650092 China

In this paper, we are concerned with the elliptic system of{ -△u＋V（x）u=g（x,v）, x∈R^N, -△v＋V（x）v=f（x,u）, x∈R^N, where V（x） is a continuous potential well, f, g are continuous and asymptotically linear as t→∞. The existence of a positive solution and ground state solution are established via variational methods.

关键词： Elliptic system ground state solution variational methods concentration-compactness principle

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藏医学中“白脉”的概念及认识

中华中医药杂志 2024年第3期39卷 1198-1202页

作者：南兴加仁青姐格知加索南才旦多杰破巴尖参明吉措姆央嘎西藏藏医药大学拉萨850000

白脉是藏医学中比较独特的内容之一,从白脉的概念、解剖、功能等方面能够了解其独特性。“白脉”是藏医学中脑及脑系所生白脉的总称,是感官意识和行为活动的重要载体。五官的五镜认识和肢体活动是通过白脉的功能而实现的。阐述藏医学“... 详细信息

白脉是藏医学中比较独特的内容之一,从白脉的概念、解剖、功能等方面能够了解其独特性。“白脉”是藏医学中脑及脑系所生白脉的总称,是感官意识和行为活动的重要载体。五官的五镜认识和肢体活动是通过白脉的功能而实现的。阐述藏医学“白脉”对脑卒中等疾病的病因病机及治疗方法的认识有很大帮助。正确认识“白脉”概念、解剖和功能,有助于发挥藏医学对脑卒中等疾病的治疗。

关键词：藏医学白脉概念认识

Spatiotemporally resolved metabolomics and isotope tracing reveal CNS drug targets

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Acta Pharmaceutica Sinica B 2023年第4期13卷 1699-1710页

作者： Bo Jin Xuechao Pang Qingce Zang Man ga Jing Xu Zhigang Luo Ruiping Zhang Jiangong Shi Jiuming He Zeper Abliz State Key Laboratory of Bioactive Substance and Function of Natural Medicines Institute of Materia MedicaChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100050China NMPA Key Laboratory for Safety Research and Evaluation of Innovative Drug Beijing 100050China Key Laboratory of Mass Spectrometry Imaging and Metabolomics(Minzu University of China) National Ethnic Affairs CommissionBeijing 100081China Key Laboratory of Ethnomedicine of Ministry of Education School of PharmacyMinzu University of ChinaBeijing 100081China

Deconvolution of potential drug targets of the central nervous system(CNS)is particularly challenging because of the complicated structure and function of the ***,a spatiotemporally resolved metabolomics and isotope tracing strategy was proposed and demonstrated to be powerful for deconvoluting and localizing potential targets of CNS drugs by using ambient mass spectrometry *** strategy can map various substances including exogenous drugs,isotopically labeled metabolites,and various types of endogenous metabolites in the brain tissue sections to illustrate their microregional distribution pattern in the brain and locate drug action-related metabolic nodes and *** strategy revealed that the sedative-hypnotic drug candidate YZG-331 was prominently distributed in the pineal gland and entered the thalamus and hypothalamus in relatively small amounts,and can increase glutamate decarboxylase activity to elevateγ-aminobutyric acid(gaBA)levels in the hypothalamus,agonize organic cation transporter 3 to release extracellular histamine into peripheral *** findings emphasize the promising capability of spatiotemporally resolved metabolomics and isotope tracing to help elucidate the multiple targets and the mechanisms of action of CNS drugs.

关键词： Ambient mass spectrometry imaging Spatiotemporally resolved metabolomics Isotope tracing Drug targets Central nervous system Drug candidate