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Quantifying foliar trait variation and covariation in sun and shade leaves using leaf spectroscopy in eastern North America

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Forest Ecosystems 2024年第5期11卷 728-742页

作者： Zhihui Wang Philip A.Townsend Eric l.Kruger Anna K.Schweiger Guangdong Provincial Key laboratory of Remote Sensing and Geographical Information System Guangdong Open Laboratory of Geospatial Information Technology and ApplicationGuangzhou Institute of GeographyGuangdong Academy of SciencesGuangzhou510070China Department of Forest and Wildlife Ecology University of Wisconsin-Madison1630 Linden DriveMadisonWI53706USA Department of land Resources and Environmental Sciences Montana State University334 Leon Johnson HallBozemanMT59717USA

Characterizing foliar trait variation in sun and shade leaves can provide insights into inter-and intra-species resource use strategies and plant response to environmental ***,datasets with records of multiple foliar traits from the same individual and including shade leaves are sparse,which limits our ability to investigate trait-trait,trait-environment relationships and trait coordination in both sun and shade *** presented a comprehensive dataset of 15 foliar traits from sun and shade leaves sampled with leaf spectroscopy,including 424 individuals of 110 plant species from 19 sites across eastern North *** investigated trait variation,covariation,scaling relationships with leaf mass,and the effects of environment,canopy position,and taxonomy on trait ***,sun leaves had higher leaf mass per area,nonstructural carbohydrates and total phenolics,lower mass-based chlorophyll a+b,carotenoids,phosphorus,and potassium,but exhibited species-specific *** between sun and shade leaf traits,and trait-environment relationships were overall consistent across *** main dimensions of foliar trait variation in seed plants were revealed including leaf economics traits,photosynthetic pigments,defense,and structural *** and canopy position collectively explained most of the foliar trait *** study highlights the importance of including intra-individual and intra-specific trait variation to improve our understanding of ecosystem *** findings have implications for efficient field sampling,and trait mapping with remote sensing.

关键词： Foliar traits leaf trait variation Trait-environment covariation Shade leaves NEON leaf spectroscopy

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New Insight into the Origins of Itch and Pain:How are Itch and Pain Signals Coded and Discriminated by Primary Sensory Neurons?

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Neuroscience Bulletin 2021年第4期37卷 575-578页

作者： Yue Hu wen-qi Shan Bin Wu Tong liu Jiangsu Key laboratory of Neuropsychiatric Diseases and Institute of Neuroscience Soochow UniversitySuzhou215123China Institute of Pain Medicine and Special Environmental Medicine Nantong UniversityNantong226019China College of life Sciences Yanan UniversityYanan716000China

The unpleasant sensations itch and pain induce distinct behavioral *** both acute itch and pain serve protective functions,they are different sensory *** stimuli lead to the scratching reflex or the desire to scratch,which may be helpful for removing potential *** contrast,pain stimuli lead to withdrawal behaviors but not scratching[1].

关键词： removing protective sensation

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Petroleum geology features and research developments of hydrocarbon accumulation in deep petroliferous basins

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Petroleum Science 2015年第1期12卷 1-53页

作者： Xiong-qi Pang Cheng-Zao Jia wen-Yang Wang State Key laboratory of Petroleum Resources and Prospecting Basin and Reservoir Research Center China University of Petroleum Petro China Company limited Research Institute of Petroleum Exploration and Development

As petroleum exploration advances and as most of the oil-gas reservoirs in shallow layers have been explored, petroleum exploration starts to move toward deep basins, which has become an inevitable choice. In this paper, the petroleum geology features and research progress on oil-gas reservoirs in deep petroliferous basins across the world are characterized by using the latest results of worldwide deep petroleum exploration. Research has demonstrated that the deep petroleum shows ten major geological features. （1） While oil-gas reservoirs have been discovered in many different types of deep petroliferous basins, most have been discovered in low heat flux deep basins. （2） Many types of petroliferous traps are developed in deep basins, and tight oil-gas reservoirs in deep basin traps are arousing increasing attention. （3） Deep petroleum normally has more natural gas than liquid oil, and the natural gas ratio increases with the burial depth. （4） The residual organic matter in deep source rocks reduces but the hydrocarbon expulsion rate and efficiency increase with the burial depth. （5） There are many types of rocks in deep hydrocarbon reservoirs, and most are clastic rocks and carbonates. （6） The age of deep hydrocarbon reservoirs is widely different, but those recently discovered are pre- dominantly Paleogene and Upper Paleozoic. （7） The porosity and permeability of deep hydrocarbon reservoirs differ widely, but they vary in a regular way with lithology and burial depth. （8） The temperatures of deep oil-gas reservoirs are widely different, but they typically vary with the burial depth and basin geothermal gradient. （9） The pressures of deep oil-gas reservoirs differ significantly, but they typically vary with burial depth, genesis, and evolu- tion period. （10） Deep oil-gas reservoirs may exist with or without a cap, and those without a cap are typically of unconventional genesis. Over the past decade, six major steps have been made in the understanding of deep hydroca

关键词： Petroliferous basin Deep petroleum geology features Hydrocarbon accumulation Petroleum exploration Petroleum resources

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模拟过火后汽车结构钢DP780的组织演变及力学性能变化

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材料热处理学报 2024年第1期45卷 138-147页

作者：王为民亓海全笪仲钟李文通万宇郭春成刘安奇韩向楠桂林理工大学材料科学与工程学院广西桂林541004 桂林理工大学有色金属及材料加工新技术教育部重点试验室广西桂林541004

采用热处理模拟手段,设定加热温度、保温时间和冷却方式,研究汽车结构钢DP780钢经火灾受热后的组织演变和力学性能变化。结果表明:在200~700℃加热条件下,DP780钢的显微组织均为铁素体和马氏体,但温度升高后,铁素体晶粒长大,马氏体发生... 详细信息

采用热处理模拟手段,设定加热温度、保温时间和冷却方式,研究汽车结构钢DP780钢经火灾受热后的组织演变和力学性能变化。结果表明:在200~700℃加热条件下,DP780钢的显微组织均为铁素体和马氏体,但温度升高后,铁素体晶粒长大,马氏体发生再结晶;无论空冷还是水冷,随加热温度的升高,DP780钢的屈服强度和抗拉强度先略有提高后快速下降,伸长率略低于原始母材。在800~1000℃加热条件下,空冷和水冷对DP780钢的组织和性能产生明显影响。800℃加热时,空冷和水冷组织均由原始铁素体、再生铁素体和马氏体构成,但后者马氏体体积分数显著增加,强度远高于前者;900~1000℃加热时,奥氏体晶粒长大,形成粗大的贝氏体和马氏体组织,强度高但塑性低。DP780钢的高温(200~700℃)力学性能与室温力学性能相比,当拉伸温度低于400℃时,强度提高,伸长率降低,高于400℃时强度急剧下降,伸长率升高。结果证实,只要DP780钢在200~1000℃受热,其综合力学性能均会发生下降,这将对采用DP780钢制结构件的事故车辆的继续服役产生一定的安全隐患。

关键词： DP780双相钢力学性能显微组织车辆火灾

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Microvascular alterations of the ocular surface and retina in connective tissue disease-related interstitial lung disease

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International Journal of Ophthalmology(English edition) 2024年第10期17卷 1869-1879页

作者： li-Ming Chen Min Kang Jun-Yi Wang San-Hua Xu Cheng Chen Hong Wei qian ling liang-qi He Jie Zou Yi-Xin Wang Xu Chen Ping Ying Hui Huang Yi Shao Rui Wu Department of Rheumatology the First Affiliated Hospital of Nanchang UniversityNanchang 330006Jiangxi ProvinceChina Department of Ophthalmology the First Affiliated Hospital of Nanchang UniversityNanchang 330006Jiangxi ProvinceChina The First School of Clinical Medicine of Nanchang University Jiangxi Medical College of Nanchang UniversityNanchang 330000Jiangxi ProvinceChina School of Optometry and Vision Science Cardiff UniversityCardiffCF244HQWalesUK Ophthalmology Centre of Maastricht University Maastricht 6200MSLimburg ProvincieNetherlands Department of Ophthalmology Eye&ENT Hospital of Fudan UniversityShanghai 200030China

AIM:To examine the disparities in macular retinal vascular density between individuals with connective tissue disease-related interstitial lung disease(CTD-IlD)and healthy controls(HCs)by optical coherence tomography angiography(OCTA)and to investigate the changes in microvascular density in abnormal ***:For a retrospective case-control study,a total of 16 patients(32 eyes)diagnosed with CTD-IlD were selected as the IlD *** 16 healthy volunteers with 32 eyes,matched in terms of age and sex with the patients,were recruited as control *** macular retina’s superficial retinal layer(SRl)and deep retinal layer(DRl)were examined and scanned using OCTA in each individual *** densities of retinal microvascular(MIR),macrovascular(MAR),and total microvascular(TMI)were calculated and *** in retinal vascular density in the macular region were analyzed using three different segmentation methods:central annuli segmentation method(C1-C6),hemispheric segmentation method[uperior right(SR),superior left(Sl),inferior left(Il),and inferior right(IR)],and Early Treatment Diabetic Retinopathy Study(ETDRS)methods[superior(S),inferior(I),left(l),and right(R)].The data were analyzed using Version 9.0 of GraphPad prism and Pearson ***:The OCTA data demonstrated a statistically significant difference(Plar retinal microvessel density between the two ***,in the SRl and DRl analyses,the IlD group exhibited significantly lower surface density of MIR and TMI compared to the HCs group(PlD group showed notable reductions in Sl,SR,and Il in the superficial retina(Pll as marked decreases in Sl and IR in the deep retina(Plarly,when employing the ETDRS method,the IlD group displayed substantial drops in superficial retinal S and I(Plong with notable reductions in deep retinal l,I,and R(Pl annuli segmentation m

关键词： connective tissue disease‑related interstitial lung disease optical coherence tomography angiography microvessel density ocular surface retina

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不同覆盖物对芦笋品质和春季产量的影响

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湖南农业科学 2024年第8期 10-14页

作者：刘奇颀郑永昕文文祝腾辉杨帆李虎余格辉岳阳市农业科学研究院湖南岳阳414000

为促进设施栽培芦笋春季早发,提升芦笋春季产量,以“CD-12”为供试材料,设置稻壳、芦笋秸秆、拱棚、拱棚+稻壳、拱棚+芦笋秸秆5种覆盖方式,比较不同覆盖物对芦笋品质和春季产量的影响。结果表明:5种覆盖方式均能提高地温,促进芦笋早发,... 详细信息

为促进设施栽培芦笋春季早发,提升芦笋春季产量,以“CD-12”为供试材料,设置稻壳、芦笋秸秆、拱棚、拱棚+稻壳、拱棚+芦笋秸秆5种覆盖方式,比较不同覆盖物对芦笋品质和春季产量的影响。结果表明:5种覆盖方式均能提高地温,促进芦笋早发,但2种复合覆盖处理方式升温效果较为显著,其中,拱棚+芦笋秸秆的效果最佳,可提高15 cm地温2.5~7.5℃,比对照提前12 d进行采收,整个采收期产量较对照增产36.39%,净收入效益增幅可达47.46%;拱棚+稻壳产量较对照增产22.01%,但成本较拱棚+芦笋秸秆处理高。单一覆盖处理中,拱棚的升温效果略好,产值较对照提高11.80%,但因覆盖成本较高,净收入相较对照并无优势;而稻壳、芦笋秸秆覆盖处理对芦笋产量和经济效益并无明显提升。

关键词：芦笋早春覆盖拱棚芦笋秸秆产量经济效益

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Integrated and holistic knowledge map of phase change materials for pavement: A scientometric analysis and bibliometric review

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Journal of Traffic and Transportation Engineering(English Edition) 2024年

作者： Jiasheng Dai Feng Ma Zhen Fu Chen li Yingjie Hou Yalu wen Yanzhe Zou Dongdong Yuan wenhao Dong Ke Shi Key laboratory for Special Area Highway Engineering of Ministry of Education， Chang'an University School of Material and Science Engineering， Chang'an University

Elevated pavement temperatures contribute to the urban heat island effect and pose a risk of thermal damage to pavement. Thus， regulating pavement temperature is paramount to ensure its longevity， enhance traffic safety， and preserve the environment. Phase change materials (PCMs) with the latent heat characteristic can store and release thermal energy via phase transitions. PCMs can effectively control pavement structure temperatures within a relatively narrow range， mitigating thermal stress on asphalt pavements. This research aims to explore the current status and emerging trends in PCM Integrated Pavement Engineering (PCMIPE) using the CiteSpace visual analysis tool. Relevant publications were systematically curated from the Web of Science core database， spanning 2011 to 2023. Subsequently， the co-authorships network maps (country， institution， author)， co-cited network maps (co-cited journals， authors， and references)， and keyword co-occurrence network maps were constructed to analyze the principal contributions in the PCMIPE field comprehensively. This analysis provides an understanding of the field's strengths， research domains， and knowledge structure and identifies current research focal points and emerging frontiers. The findings reveal that research within the PCMIPE field is still in its early stages， with a predominant emphasis on material design and performance assessment. Additionally， future research is anticipated to expand into economic analyses and exploration of environmental effects when integrating PCMs into pavement engineering. Furthermore， there is an emerging interest in investigating the synergy of PCMs with other functional pavement technologies. These results underscore the potential of the PCMIPE field and emphasize the importance of future research endeavors.

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中国互联网内容企业“出海”的区位选择及影响因素——基于“制度风险—战略动机”互动分析框架

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新闻大学 2024年第4期 30-44,117,118页

作者：殷琦王牧耕厦门大学新闻传播学院福建厦门361005

本研究从制度的能动性视角出发,构建包含国家与企业双重维度的“制度风险—战略动机”互动分析框架,对中国互联网内容企业国际化区位选择的影响因素及机制展开实证研究。研究发现:中国互联网内容企业“出海”呈现出明显的“制度风险规... 详细信息

本研究从制度的能动性视角出发,构建包含国家与企业双重维度的“制度风险—战略动机”互动分析框架,对中国互联网内容企业国际化区位选择的影响因素及机制展开实证研究。研究发现:中国互联网内容企业“出海”呈现出明显的“制度风险规避”特征,且企业战略动机对此特征具有显著的增强效应,这说明其国际化行为主要遵循经济逻辑。本研究将国际传播关注的焦点从内容传播策略拓展至企业运营层面,既为国际传播研究提供了一个新的理论视角,也为互联网内容企业优化国际化策略、更好地进行国际传播提供微观依据。

关键词：互联网内容企业国际化制度风险战略动机

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SEM视角下人民币汇率风险影响因素研究

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亚太经济 2024年第1期 65-72,119页

作者：蔡梓涵叶琪新加坡南洋理工大学公共管理研究生院新加坡639798 福建师范大学经济学院福州350001

基于SEM视角,结合我国宏观经济特征与制度背景,运用Granger检验方法选取影响人民币汇率风险的备选指标,使用探索性因子对影响因素进行KMO和Bartlett检验,采用方差极大法对因子载荷矩阵实行正交旋转,构建汇率风险测度因子分析模型,并用SE... 详细信息

基于SEM视角,结合我国宏观经济特征与制度背景,运用Granger检验方法选取影响人民币汇率风险的备选指标,使用探索性因子对影响因素进行KMO和Bartlett检验,采用方差极大法对因子载荷矩阵实行正交旋转,构建汇率风险测度因子分析模型,并用SEM模型绘制出人民币汇率风险影响路径系数图,分析影响人民币汇率风险的主要因素,为人民币汇率风险测度提供科学依据。

关键词：汇率风险测度影响因素结构方程模型

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细胞外囊泡及长链非编码RNAs在多囊卵巢综合征中的研究进展

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中华生殖与避孕杂志 2024年第9期44卷 974-979页

作者：文婷媛王德婧遵义医科大学附属医院生殖医学科遵义医科大学附属医院妇产科遵义563000

多囊卵巢综合征(polycystic ovary syndrome,PCOS)是一种以高雄激素血症、无排卵或稀发排卵和卵巢多囊样改变为主要特征的生殖内分泌紊乱性疾病。PCOS的发生、发展与多种因素有关,表观遗传因素可能在其中起着重要作用。细胞外囊泡(extra... 详细信息

多囊卵巢综合征(polycystic ovary syndrome,PCOS)是一种以高雄激素血症、无排卵或稀发排卵和卵巢多囊样改变为主要特征的生殖内分泌紊乱性疾病。PCOS的发生、发展与多种因素有关,表观遗传因素可能在其中起着重要作用。细胞外囊泡(extracellular vesicles,EVs)是包载DNA、RNA、脂质和蛋白质的脂质双分子层纳米颗粒,在细胞之间通信过程中发挥重要作用。研究显示,PCOS的发病机制与细胞外囊泡密切相关。长链非编码RNA(long non-coding RNA,lncRNA)是由超过200个核苷酸组成的RNA分子,在颗粒细胞的增殖与凋亡、卵泡发育及内分泌代谢等多个环节发挥重要作用。本文对细胞外囊泡及lncRNA在PCOS发病机制的研究进行综述,为PCOS的诊断和治疗提供新的研究方向。

关键词：多囊卵巢综合征细胞外囊泡长链非编码RNA

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