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Divergent response of vegetation phenology to extreme temperatures and precipitation of different intensities on the Tibetan Plateau

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Science China Earth Sciences 2023年第10期66卷 2200-2210页

作者： Mai SUN Peng LI peixin ren Jiayi TANG Cicheng ZHANG Xiaolu ZHOU Changhui PENG School of Geographic Sciences Hunan Normal UniversityChangsha410081China Department of Biology Sciences Institute of Environment SciencesUniversity of Quebec at MontrealMontrealH3C 3P8Canada

Quantifying how climate factors affect vegetation phenology is crucial for understanding climate-vegetation interactions and carbon and water cycles under a changing ***,the effects of different intensities of extreme climatic events on vegetation phenology remain poorly *** a long-term solar-induced chlorophyll fluorescence dataset,we investigated the response of vegetation phenology to extreme temperatures and precipitation events of different intensities across the Tibetan Plateau(TP)from 2000 to *** found that the effect of maximum temperature exposure days(TxED)and minimum temperature exposure days(TnED)on the start of the growing season(SOS)was initially delayed and shifted to advance along the increasing temperature ***,the response of the end of the growing season(EOS)to TxED and TnED shifted from an advance to a delay with increasing temperature gradients until the temperature thresholds were reached,above which thresholds produced an unfavorable response to vegetation growth and brought the EOS to an early *** corresponding maximum and minimum temperature thresholds were 10.12 and 2.54℃,*** contrast,cumulative precipitation(CP)was more likely to advance SOS and delay EOS as the precipitation gradient increased,but the advance of SOS is gradually *** vegetation types(i.e.,forest,shrubland,meadow,and steppe)showed similar trends in response to different climates,but the optimal climatic conditions varied between the vegetation ***,meadow and steppe had lower optimal temperatures and precipitation than forest and *** findings revealed the divergent responses of vegetation phenology to extreme climate events of different intensities,implying that the SOS will continue to advance with warming,whereas the EOS may undergo a partial transformation from delayed areas to advanced areas with continued warming.

关键词： Vegetation phenology Extreme climates Optimal climate Solar-induced chlorophyll fluorescence Tibetan Plateau

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Accelerating lithium-sulfur battery reaction kinetics and inducing 3D deposition of Li_(2)S using interactions between Fe_(3)Se_(4)and lithium polysulfides

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Journal of Energy Chemistry 2024年第8期95卷 540-553,I0012页

作者： Yihan Lin Liheng Li Longjie Tan Yongliang Li Xiangzhong ren peixin Zhang Chuanxin He Lingna Sun College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060GuangdongChina

Although lithium-sulfur batteries(LSBs)exhibit high theoretical energy density,their practical application is hindered by poor conductivity of the sulfur cathode,the shuttle effect,and the irreversible deposition of Li_(2)*** address these issues,a novel composite,using electrospinning technology,consisting of Fe_(3)Se_(4)and porous nitrogen-doped carbon nanofibers was designed for the interlayer of *** porous carbon nanofiber structure facilitates the transport of ions and electrons,while the Fe_(3)Se_(4)material adsorbs lithium polysulfides(LiPSs)and accelerates its catalytic conversion ***,the Fe_(3)Se_(4)material interacts with soluble LiPSs to generate a new polysulfide intermediate,Li_(x)FeS_(y)complex,which changes the electrochemical reaction pathway and facilitates the three-dimensional deposition of Li_(2)S,enhancing the reversibility of *** designed LSB demonstrates a high specific capacity of1529.6 mA h g^(-1)in the first cycle at 0.2 *** rate performance is also excellent,maintaining an ultra-high specific capacity of 779.7 mA h g^(-1)at a high rate of 8 *** investigation explores the mechanism of the interaction between the interlayer and LiPSs,and provides a new strategy to regulate the reaction kinetics and Li_(2)S deposition in LSBs.

关键词： Lithium-sulfur batteries Polysulfide intermediates Li_(2)S electrodeposition Interlayers Electrostatic spinning Adsorption Catalysis

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Strong controls of daily minimum temperature on the autumn photosynthetic phenology of subtropical vegetation in China

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Forest Ecosystems 2021年第3期8卷 413-424页

作者： peixin ren Zelin Liu Xiaolu Zhou Changhui Peng Jingfeng Xiao Songhan Wang Xing Li Peng Li College of Geographic Science Hunan Normal UniversityChangsha 410081China Department of Biology Sciences Institute of Environment SciencesUniversity of Quebec at MontrealC.P.8888Succ.Centre-VilleMontreal H3C 3P8Canada Earth Systems Research Center Institute for the Study of EarthOceansand SpaceUniversity of New HampshireDurhamNH 03824USA International Institute for Earth System Sciences Nanjing UniversityNanjing 210023China Jiangsu Provincial Key Laboratory of Geographic Information Technology Key Laboratory for Land Satellite Remote Sensing Applications of Ministry of Natural ResourcesSchool of Geography and Ocean ScienceNanjing UniversityNanjing 210023China

Background:Vegetation phenology research has largely focused on temperate deciduous forests,thus limiting our understanding of the response of evergreen vegetation to climate change in tropical and subtropical ***:Using satellite solar-induced chlorophyll fluorescence(SIF)and MODIS enhanced vegetation index(EVI)data,we applied two methods to evaluate temporal and spatial patterns of the end of the growing season(EGS)in subtropical vegetation in China,and analyze the dependence of EGS on preseason maximum and minimum temperatures as well as cumulative *** results indicated that the averaged EGS derived from the SIF and EVI based on the two methods(dynamic threshold method and derivative method)was later than that derived from gross primary productivity(GPP)based on the eddy covariance technique,and the time-lag for EGSsif and EGSevi was approximately 2 weeks and 4 weeks,*** found that EGS was positively correlated with preseason minimum temperature and cumulative precipitation(accounting for more than 73%and 62%of the study areas,respectively),but negatively correlated with preseason maximum temperature(accounting for more than 59%of the study areas).In addition,EGS was more sensitive to the changes in the preseason minimum temperature than to other climatic factors,and an increase in the preseason minimum temperature significantly delayed the EGS in evergreen forests,shrub and ***:Our results indicated that the SIF outperformed traditional vegetation indices in capturing the autumn photosynthetic phenology of evergreen forest in the subtropical region of *** found that minimum temperature plays a significant role in determining autumn photosynthetic phenology in the study *** findings contribute to improving our understanding of the response of the EGS to climate change in subtropical vegetation of China,and provide a new perspective for accurately evaluating the role played by evergreen vegetatio

关键词： Carbon cycle Evergreen vegetation Plant phenology Solar-induced Fluorescence Climate change MODIS Eddy covariance

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Periostin蛋白与心血管疾病关系的研究进展

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中国医师杂志 2021年第1期23卷 158-160页

作者：任佩欣杨慧宇山西医科大学第二医院心血管内科太原030001

Periostin蛋白是一种高度保守的功能蛋白,在血管损伤、心肌纤维化过程中发挥着重要作用,近年来关于peirostin蛋白在心血管疾病中的研究越来越多,现就periostin蛋白与心血管疾病的研究进展作一综述。

关键词：高血压冠心病心力衰竭心房颤动骨膜蛋白

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哈尔滨城市河流廊道草本层自生植物多样性及分布特征

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风景园林 2024年第6期31卷 28-36页

作者：申沛鑫任术梁新悦胡远东东北林业大学园林学院大庆市自然资源局西安建筑科技大学交叉创新研究院黑龙江寒地园林植物种质资源开发与景观生态修复重点实验室

【目的】河流廊道是城市自生植物重要的栖息地,揭示其自生植物多样性分布格局及成因,有助于完善城市植被研究体系、指导城市生物多样性保育以及低维护与可持续绿地景观营造。【方法】采取均匀取样法和典型取样法,选取哈尔滨市何家沟和... 详细信息

【目的】河流廊道是城市自生植物重要的栖息地,揭示其自生植物多样性分布格局及成因,有助于完善城市植被研究体系、指导城市生物多样性保育以及低维护与可持续绿地景观营造。【方法】采取均匀取样法和典型取样法,选取哈尔滨市何家沟和马家沟两条河流廊道的中心城区段共951个样方展开草本层自生植物调查,并解析3个大类生境和11类微生境中的自生植物多样性及分布特征。【结果】1)共记录草本层自生植物151种,隶属于36科、112属;2)中低等城市化水平(Ⅰ~Ⅲ)下的草本层自生植物及乡土植物的α多样性显著高于其他城市化水平(Ⅳ~Ⅴ)下的α多样性;不同类型生境自生植物的多样性特征差异显著,入侵植物呈现均质化分布格局;3)不同生境类型所处的坡向、距水体的距离、植被结构、管理强度等因素对自生植物的生活型、发生方式以及扩散方式均产生显著影响。【结论】为哈尔滨城市河流廊道生物多样性的保育以及低碳、低维护植物景观设计提供了新的视角,通过合理留存和利用自生植物,能最大限度地发挥河流廊道绿地的各项生态服务功能。

关键词：生物多样性生境异质性城市化水平河流廊道草本层自生植物

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某水厂水源置换工程水文地质条件及评价

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河南水利与南水北调 2023年第5期52卷 45-46页

作者：葛仁涛陈艳朋任沛鑫陈平货河南省水利勘测有限公司河南郑州450003 河南永固岩土工程有限公司河南开封475000

开封市第二水厂水源置换工程新打深600 m水源井12眼,对现有水源进行置换,设计供水能力2万m^(3)/d,输水管道长约2.65 km。通过对工程区地层岩性、地下水补排条件的论述以及对抽水试验、水质分析成果的分析,提出了第二水厂的水源含水层为... 详细信息

开封市第二水厂水源置换工程新打深600 m水源井12眼,对现有水源进行置换,设计供水能力2万m^(3)/d,输水管道长约2.65 km。通过对工程区地层岩性、地下水补排条件的论述以及对抽水试验、水质分析成果的分析,提出了第二水厂的水源含水层为新近系深层地下水,水源地面积约50.24 km^(2),单位涌水量Q=4 m^(3)/(h·m),调蓄能力巨大。并强调加强对地表水、地下水的监测,掌握水质与水量的动态变化,保证水源地的水资源良性延续。

关键词：第二水厂水源置换工程水文地质条件评价

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哈尔滨市土壤保持服务价值时空演变及其驱动力

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水土保持通报 2024年第1期44卷 357-367页

作者：祁玉馨赵聪聪申沛鑫任术胡远东东北林业大学园林学院黑龙江哈尔滨150040

[目的]土壤侵蚀是全球性的重要环境问题,严重制约了人类的生产和生活。定量研究土壤保持服务价值为区域水土保持措施的制定,哈尔滨市水土保持功能分区规划提供科学依据。[方法]基于InVEST模型泥沙输移比例模块,对哈尔滨市2000,2010,202... 详细信息

[目的]土壤侵蚀是全球性的重要环境问题,严重制约了人类的生产和生活。定量研究土壤保持服务价值为区域水土保持措施的制定,哈尔滨市水土保持功能分区规划提供科学依据。[方法]基于InVEST模型泥沙输移比例模块,对哈尔滨市2000,2010,2020年的土壤侵蚀量和土壤保持量进行评估,借助空间自相关法分析土壤保持量的空间聚集类型,并利用参数最优地理探测器揭示其空间异质性形成的驱动力。[结果]①2000,2010,2020年哈尔滨市土壤保持量分别为2.18×10^(9),2.07×10^(9),2.77×10^(9)t,呈现先减少后增加的趋势,整体呈现“西低东高”的空间分布格局;②土壤保持量呈现强烈的空间正相关,以低—低聚集和高—高聚集类型为主,低—低聚集类型面积呈现下降趋势,而高—高聚集类型则呈现先降低后上升的趋势;③高程、降水量和坡度对哈尔滨市土壤保持量空间异质性的解释力最强,平均解释力分别为0.2259,0.1989,0.1804,其中坡度和降水量与其他因子的交互作用,是研究区解释力最强的交互因素。[结论]哈尔滨市应加强对城市西部和松花江沿岸的水土治理,同时维持城市北部和东部良好的水土状况,避免大规模的人类干扰活动。

关键词： InVEST模型土壤保持地理探测器空间自相关哈尔滨市

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Hybrid CuO-Co_(3)O_(4)nanosphere/RGO sandwiched composites as anode materials for lithium-ion batteries

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Chinese Journal of Chemical Engineering 2022年第7期35卷 185-192页

作者： Yingmeng Zhang Luting Liu Qingwei Deng Wanlin Wu Yongliang Li Xiangzhong ren peixin Zhang Lingna Sun College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China

Hybrid CuO-Co_(3)O_(4)nanosphere building blocks have been embedded between the layered nanosheets of reduced graphene oxides with a three dimensional(3D)hybrid architecture(CuO-Co_(3)O_(4)-RGO),which are successfully applied as enhanced anodes for lithium-ion batteries(LIBs).The CuO-Co_(3)O_(4)-RGO sandwiched nanostructures exhibit a reversible capacity of~847 mA·h·g^(-1)after 200 cycles’cycling at 100 mA·g^(-1)with a capacity retention of 79%.The CuO-Co_(3)O_(4)-RGO compounds show superior electrochemical properties than the comparative CuO-Co_(3)O_(4),Co_(3)O_(4)and CuO anodes,which may be ascribed to the following reasons:the hybridizing multicomponent can probably give the complementary advantages;the mutual benefit of uniformly distributing nanospheres across the layered RGO nanosheets can avoid the agglomeration of both the RGO nanosheets and the CuO-Co_(3)O_(4) nanospheres;the 3D storage structure as well as the graphene wrapped composite could enhance the electrical conductivity and reduce volume expansion effect associated with the discharge-charge process.

关键词： Composites Nanostructure Nanoparticles Reduced graphene oxide Metal oxides Lithium ion batteries

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Fe_(2)O_(3)-MWNTs Composite with Reinforced Concrete Structure as High-performance Anode Material for Lithium-ion Batteries

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Chemical Research in Chinese Universities 2023年第2期39卷 240-245页

作者： WANG Suhang ZUO Jinxin LI Yongliang ZHONG Yiming ren Xiangzhong ZHANG peixin SUN Lingna College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen518060P.R.China Babel International College PerthWA6100Australia

A Fe_(2)O_(3)-MWNTs(multi-walled carbon nanotubes)composite with a reinforced concrete structure was fabricated employing a two-step method which involves a sol-gel process followed by high-temperature in situ *** Fe_(2)O_(3)-MWNTs composite,intended to be used as an anode material for lithium-ion batteries,maintained a reversible capacity as high as 896.3 mA·h/g after 100 cycles at a current density of 100 mA/g and the initial coulombic efficiency reached 75.5%.The rate capabilities of the Fe_(2)O_(3)-MWNTs composite,evaluated using the ratios of capacity at 100,200,500,1000,2000 and 100 mA/g after every 10 cycles,were determined to be 904.7,852.1,759.0,653.8,566.8 and 866.3 mA·h/g,*** a superior electrochemical performance of the Fe_(2)O_(3)-MWNTs composite is mainly attributed to the reinforced concrete construction,in which the MWNTs function as the skeleton and conductive *** a structure contributes to shortening the transport pathways for both Li+and electrons,enhancing conductivity and accommodating volume expansion during prolonged *** Fe_(2)O_(3)-MWNTs composite with the designed structure is a promising anode material for high-performance lithium-ion batteries.

关键词： Lithium-ion battery Anode material Fe_(2)O_(3)-multi-walled carbon nanotubes(MWNTs)composite Sol-gel Reinforced concrete structure

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囊胚形态学评价参数对IVF/ICSI助孕后稽留流产绒毛染色体核型异常的影响

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中华生殖与避孕杂志 2024年第6期44卷 628-634页

作者：李梦娜郑威杨宸任炳楠袁二凤高松占俎若雯邝义会吴静曹梦依韩静宜李培鑫申冉管一春郑州大学第三附属医院生殖医学中心郑州450052

目的分析囊胚形态学评价参数包括囊胚发育天数(第5天和第6天)、囊胚扩张程度(4、5、6)、内细胞团和滋养外胚层分级对体外受精/卵胞质内单精子注射(in vitro fertilization/intracytoplasmic sperm injection,IVF/ICSI)助孕新鲜或冻融单... 详细信息

目的分析囊胚形态学评价参数包括囊胚发育天数(第5天和第6天)、囊胚扩张程度(4、5、6)、内细胞团和滋养外胚层分级对体外受精/卵胞质内单精子注射(in vitro fertilization/intracytoplasmic sperm injection,IVF/ICSI)助孕新鲜或冻融单囊胚移植后稽留流产绒毛染色体核型异常发生的影响。方法纳入2015年2月至2023年2月期间于郑州大学第三附属医院生殖医学中心行IVF/ICSI助孕新鲜或冻融单囊胚移植后稽留流产患者的临床数据及绒毛染色体拷贝数变异(copy number variations,CNVs)的检测结果。采用病例对照研究,根据流产组织绒毛染色体CNVs检测结果将数据分为两组:异常染色体核型组(n=139)和正常染色体核型组(n=82),比较两组患者的基线数据。应用单因素logistic回归分析囊胚形态学评价参数对流产组织绒毛染色体核型异常发生的影响,同时应用多因素logistic回归调整男方年龄、精子正常形态率和女方年龄混杂因素。结果基线数据中,异常染色体核型组男方年龄[(34.12±6.49)岁]、精子正常形态率[5.00(4.00,6.00)%]和女方年龄[33.00(30.00,37.00)岁]高于正常染色体核型组[(32.38±4.69)岁、4.00(2.00,5.00)%和31.50(29.00,34.00)岁],差异均具有统计学意义(P=0.022、P=0.020、P=0.009)。单因素和多因素logistic回归分析数据显示,囊胚发育天数、扩张程度、内细胞团和滋养外胚层等级均没有增加绒毛染色体核型异常发生的风险(均P>0.05)。结论囊胚形态学评价参数与IVF/ICSI助孕新鲜或冻融单囊胚移植后稽留流产绒毛染色体核型异常无明显相关性。

关键词：单囊胚胚胎形态学参数内细胞团滋养外胚层稽留流产绒毛染色体核型异常

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