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What control the spatial patterns and predictions of runoff response over the contiguous USA?

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Journal of Geographical Sciences 2024年第7期34卷 1297-1322页

作者： jiang Shanhu DU Shuping REN Liliang GONG Xinglong YAN Denghua YUAN Shanshui LIU Yi YANG xiaoli XU Chongyu The National Key Laboratory of Water Disaster Prevention Hohai UniversityNanjing210098China College of Hydrology and Water Resources Hohai UniversityNanjing210098China School of Water Conservancy&Civil Engineering Northeast Agricultural UniversityHarbin150030China Department of Water Resources China Institute of Water Resources and Hydropower ResearchBeijing100038China Department of Geosciences University of OsloOsloNorway

Understanding the nonlinear relationship between hydrological response and key factors and the cause behind this relationship is vital for water resource management and earth system *** this study,we undertook several steps to explore the ***,we partitioned runoff response change(RRC)into multiple components associated with climate and catchment properties,and examined the spatial patterns and smoothness indicated by the Moran's Index of RRC across the contiguous United States(CONUS).Subsequently,we employed a machine learning model to predict RRC using catchment attribute predictors encompassing climate,topography,hydrology,soil,land use/cover,and ***,we identified the primary factors influencing RRC and quantified how these key factors control RRC by employing the accumulated local effect,which allows for the representation of not only dominant but also secondary ***,we explored the relationship between ecoregion patterns,climate gradients,and the distribution of RRC across *** findings indicate that:(1)RRC demonstrating significant connections between catchments tends to be well predicted by catchment attributes in space;(2)climate,hydrology,and topography emerge as the top three key attributes nonlinearly influencing the RRC patterns,with their second-order effects determining the heterogeneous patterns of RRC;and(3)local Moran's I signifies a collaborative relationship between the patterns of RRC and their spatial smoothness,climate space,and ecoregions.

关键词： hydrological response prediction machine learning accumulated local effect Moran’s Index large-sample study

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SSRF储存环高频屏蔽波纹管的研制

核技术 2005年第2期28卷 93-97页

作者：蒋迪奎姜晓丽中国科学院上海应用物理研究所上海201800

建造中的上海光源即上海同步辐射装置 (SSRF)储存环将采用内装高频屏蔽机构的波纹管——高频屏蔽波纹管。SSRF 采用了由接触指和弹簧指构成的双指型屏蔽机构。屏蔽机构的关键设计参数是由 SSRF 壁电流和壁电场所决定的指间接触力和高次... 详细信息

建造中的上海光源即上海同步辐射装置 (SSRF)储存环将采用内装高频屏蔽机构的波纹管——高频屏蔽波纹管。SSRF 采用了由接触指和弹簧指构成的双指型屏蔽机构。屏蔽机构的关键设计参数是由 SSRF 壁电流和壁电场所决定的指间接触力和高次模决定的相邻接触指间的缝隙宽度和长度。对高频屏蔽波纹管进行了热测试和阻抗测试。测试结果表明,接触力、缝隙和阻抗都适合 SSRF 的实际运行条件。

关键词：束流波纹管高频屏蔽机构接触力缝隙阻抗

Strong metal–support interaction boosts the electrocatalytic hydrogen evolution capability of Ru nanoparticles supported on titanium nitride

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Carbon Energy 2024年第1期6卷 245-254页

作者： Xin Wang xiaoli Yang Guangxian Pei Jifa Yang Junzhe Liu Fengwang Zhao Fayi Jin Wei jiang Haoxi Ben Lixue Zhang College of Chemistry and Chemical Engineering Collaborative Innovation Center for Hydrogen Energy Key Materials and Technologies of Shandong ProvinceQingdao UniversityQingdaoShandongChina State Key Laboratory of Bio-fibers and Eco-Textiles Qingdao UniversityQingdaoShandongChina Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of ScienceQingdaoShandongChina

Ruthenium(Ru)has been regarded as one of the most promising alternatives to substitute Pt for catalyzing alkaline hydrogen evolution reaction(HER),owing to its inherent high activity and being the cheapest platinum-group ***,based on the idea of strong metal–support interaction(SMSI)regulation,Ru/TiN catalysts with different degrees of TiN overlayer over Ru nanoparticles were fabricated,which were applied to the alkaline electrolytic *** reveal that the TiN overlayer would gradually encapsulate the Ru nanoparticles and induce more electron transfer from Ru nanoparticles to TiN support by the Ru–N–Ti bond as the SMSI degree *** study shows that the exposed Ru–TiN interfaces greatly promote the H_(2) desorption ***,the Ru/TiN-300 with a moderate SMSI degree exhibits excellent HER performance,with an overpotential of 38 mV at 10 mA cm^(−2).Also,due to the encapsulation role of TiN overlayer on Ru nanoparticles,it displays super long-term stability with a very slight potential change after 24 *** study provides a deep insight into the influence of the SMSI effect between Ru and TiN on HER and offers a novel approach for preparing efficient and stable HER electrocatalysts through SMSI engineering.

关键词： electronic structure hydrogen evolution reaction ruthenium strong metal-support interaction titanium nitride

铱催化β,β-二取代N-酰基烯胺的β-选择性不对称氢炔基化构建含β-手性季碳高炔丙基胺

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有机化学 2021年第9期41卷 3745-3747页

作者：江晓莉朱少林南京大学化学化工学院南京210093

β-手性季碳胺及其衍生物广泛存在于天然产物、药物和农药分子结构中(Scheme 1),不对称构建该类化合物是合成化学中的一大挑战.含β-手性季碳高炔丙基胺由于自身含有的炔基官能团能进行多样性的转化得到系列高附加值下游产物,更是吸引... 详细信息

β-手性季碳胺及其衍生物广泛存在于天然产物、药物和农药分子结构中(Scheme 1),不对称构建该类化合物是合成化学中的一大挑战.含β-手性季碳高炔丙基胺由于自身含有的炔基官能团能进行多样性的转化得到系列高附加值下游产物,更是吸引了合成化学家的关注.从简单易得的N-酰基烯胺和端炔出发的直接不对称氢炔基化策略是合成手性高炔丙基胺最高效直接的方法之一.

关键词：手性季碳合成化学炔丙基胺烯胺炔基化天然产物分子结构端炔

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美国大学生汉语口语交际难点与应对策略研究

世界汉语教学 2015年第2期29卷 250-264页

作者：江晓丽中国人民大学外国语学院

外语学习策略研究的发展趋势是结合学生描述的学习策略和他们在具体语言任务中使用的策略,客观分析他们的外语学习策略使用情况,从而为外语学习寻求突破捷径。目前,这种方法还鲜被CS/FL(汉语作为二语/外语)学习策略研究人员采纳,CS/FL... 详细信息

外语学习策略研究的发展趋势是结合学生描述的学习策略和他们在具体语言任务中使用的策略,客观分析他们的外语学习策略使用情况,从而为外语学习寻求突破捷径。目前,这种方法还鲜被CS/FL(汉语作为二语/外语)学习策略研究人员采纳,CS/FL的口语交际策略研究相对匮乏。本文通过对两所美国大学三个级别共155名学生自述的汉语口语学习难点与应对策略的定量、定性分析,并设计了相应的具体口语任务,并在24名成功的汉语口语学习者中进行观察和检验。结果发现:学生自述的口语交际难点与应对策略和他们在实际口语任务中的情况存在差异,学习者的汉语水平和口语交际难点存在一定程度的负相关。

关键词：美国大学生口语交际难点口语交际策略口语任务

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基于显式弹塑性车辆悬架系统结构优化设计

现代制造工程 2017年第9期 59-67页

作者：姜小丽冀中职业学院定州073000

悬架系统是整车安全行驶的重要结构件。以某重型运载车辆单纵臂悬架为研究对象,使用应力波传播理论,在ABAQUS软件中搭建悬架系统模型,对悬架在3种典型工况下的显式动力学性能进行分析。分析结果表明:3种不同工况下的应力值都较大;动载... 详细信息

悬架系统是整车安全行驶的重要结构件。以某重型运载车辆单纵臂悬架为研究对象,使用应力波传播理论,在ABAQUS软件中搭建悬架系统模型,对悬架在3种典型工况下的显式动力学性能进行分析。分析结果表明:3种不同工况下的应力值都较大;动载荷是对悬架结构造成破坏的最重要因素;悬架中的焊缝连接处及尖角处具有明显的应力集中和塑性变形;悬架结构中相对薄弱的区域主要是集中在转向节和转向纵臂的铰接连接处。根据强度和刚度分析结果对悬架结构进行改进和优化,并采用试车方法进行验证。试验结果表明,显式动力学弹塑性能分析方法对计算动载荷工况下悬架应力应变状况实用有效。

关键词：单纵臂悬架悬架系统显式动力学弹塑性应力优化

Genetic dissection and validation of a major QTL for grain weight on chromosome 3B in bread wheat(Triticum aestivum L.)

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Journal of Integrative Agriculture 2024年第1期23卷 77-92页

作者： Simin Liao Zhibin Xu xiaoli Fan Qiang Zhou Xiaofeng Liu Cheng jiang Liangen Chen Dian Lin Bo Feng Tao Wang Chengdu Institute of Biology Chinese Academy of SciencesChengdu 610041China University of Chinese Academy of Sciences Beijing 100049China The Innovative Academy of Seed Design Chinese Academy of SciencesBeijing 100101China

Grain weight is one of the key components of wheat(Triticum aestivum L.)*** manipulation of grain weight is an efficient approach for improving yield potential in breeding programs.A recombinant inbred line(RIL)population derived from a cross between W7268 and Chuanyu 12(CY12)was employed to detect quantitative trait loci(QTLs)for thousand-grain weight(TGW),grain length(GL),grain width(GW),and the ratio of grain length to width(GLW)in six *** major QTLs,***-2D,***-2D,***-3B,***-4B.1,***-2D.1,***-2D.1 and ***-3B.1,were consistently identified in at least four environments and the best linear unbiased estimation(BLUE)datasets,and they explained 2.61 to 34.85%of the phenotypic *** interactions were detected between the two major TGW QTLs and three major GW *** addition,***-3B.1 and ***-3B were co-located,and the improved TGW at this locus was contributed by *** other loci,***-3B.1/***-3B had no effect on grain number per spike(GNS).They were further validated in advanced lines using Kompetitive Allele Specific PCR(KASP)markers,and a comparison analysis indicated that ***-3B.1/***-3B is likely a novel *** haplotypes were identified in the region of this QTL and their distribution frequencies varied between the landraces and *** to gene annotation,spatial expression patterns,ortholog analysis and sequence variation,the candidate gene of ***-3B.1/***-3B was ***,the major QTLs and KASP markers reported here provide valuable information for elucidating the genetic architecture of grain weight and for molecular marker-assisted breeding in grain yield improvement.

关键词： thousand-grain weight QTL mapping haplotype analysis candidate gene