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Frontiers of Architectural Research 2024年第2期13卷 305-318页

作者： Bo Wan Dongyang Wan qiang sheng School of Architecture and Design Beijing Jiaotong UniversityBeijing 100044China

This paper,set against the backdrop of expanding urban rail networks and dynamic urban development,focuses on the distribution and evolution of commercial Points of Interests(POIs)within the central urban rail transit areas of *** study examines data from four different years-2008,2013,2017,and 2020-to observe the temporal evolution of commercial *** identifies stable explanatory variables affecting the distribution and evolution of commercial POIs,which include rail transit accessibility,characteristics of the working and residential population distribution around stations,and the construction intensity in the vicinity of station *** statistical analysis and model building,relatively stable linear regression equations were established,with R2 values generally maintained above 0.5(except for 2017).The study advances our understanding of the influence of rail transit on urban commercial spaces and how this influence shifts with temporal and urban developmental *** elucidates the correlation between changes in the number of businesses and spatial configuration,offering insights and information for urban planners and policy *** research also serves as a model for exploring the interplay between urban rail transit and commercial spaces in other major cities.

关键词： Urbanrail transit areas Spatial configuration Distributionand evolution of commercial POls

Massively parallel algorithms for fully dynamic all-pairs shortest paths

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Frontiers of Computer Science 2024年第4期18卷 201-203页

作者： Chilei WANG qiang-sheng HUA Hai JIN Chaodong ZHENG National Engineering Research Center for Big Data Technology and System Services Computing Technology and System LabCluster and Grid Computing LabSchool of Computer Science and TechnologyHuazhong University of Science and TechnologyWuhan 430074China State Key Laboratory for Novel Software Technology Nanjing UniversityNanjing 210023China

1 Introduction In recent years,the Massively Parallel Computation(MPC)model has gained significant ***,most of distributed and parallel graph algorithms in the MPC model are designed for static graphs[1].In fact,the graphs in the real world are constantly *** size of the real-time changes in these graphs is smaller and more *** graph algorithms[2,3]can deal with graph changes more efficiently[4]than the corresponding static graph ***,most studies on dynamic graph algorithms are limited to the single machine ***,a few parallel dynamic graph algorithms(such as the graph connectivity)in the MPC model[5]have been proposed and shown superiority over their parallel static counterparts.

关键词： dynamic shortest gained

Radical involved reactive wetting and retarding mechanism of alumina refractory ceramic by molten slags under weak static magnetic field

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Journal of Iron and Steel Research International 2024年第6期31卷 1355-1366页

作者： sheng-hao Li Ao Huang Fan-bo Zeng Hui Peng Hao-ran Wei Xue-chun Huang sheng-qiang Song Hua-zhi Gu The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina

High alumina slag will cause severe corrosion at the interface of alumina refractory,and the wetting behavior of slag is a key factor influencing the corrosion resistance of refractory *** static magnetic field is a promising solution for improvement in the slag resistance of *** wetting of alumina refractory ceramics with different basicities of high alumina slags under a weak static magnetic field was analyzed,given that a weak static magnetic field can affect the corrosion behavior of refractory *** slag S_(3) as an example,when there was an external static magnetic field of 1.0 mT at 1600 ℃,the thickness of calcium aluminate reaction layer at the interface decreased by 36.7%,the denting depth of interface decreased by 35.6%,and the apparent wetting angle increased by 20%.The living radicals and their formation path in oxide melts were verified by first-principles calculation combined with electron paramagnetic resonance spectroscopy *** influence of the flux density of a weak static magnetic field on the wetting behavior of slags was also *** contact angle of the slags increased owing to the inhibitory effect of magnetic field on the radicalinvolved reaction at the interface of the slag and the alumina refractory *** relationships between the magnetic flux density,diffusion coefficient,slag microstructure(hyperfine coupling constant),and contact angle were *** provides a theoretical basis for the field control of radical involved reactive wetting between inorganic oxide slags and solid oxide ceramics.

关键词： Alumina refractory ceramic Molten slag Weak magnetic field effect Reactive wetting Free radical

CAGCN:Centrality-Aware Graph Convolution Network for Anomaly Detection in Industrial Control Systems

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Journal of Computer Science & Technology 2024年第4期39卷 967-983页

作者： Jun Yang Yi-qiang sheng Jin-Lin Wang Hong Ni National Network New Media Engineering Research Center Institute of AcousticsChinese Academy of SciencesBeijing 100190China School of Electronic Electrical and Communication EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China

In industrial control systems,the utilization of deep learning based methods achieves improvements for anomaly ***,most current methods ignore the association of inner components in industrial control *** industrial control systems,an anomaly component may affect the neighboring components;therefore,the connective relationship can help us to detect anomalies *** this paper,we propose a centrality-aware graph convolution network(CAGCN)for anomaly detection in industrial control *** the traditional graph convolution network(GCN)model,we utilize the concept of centrality to enhance the ability of graph convolution networks to deal with the inner relationship in industrial control *** experiments show that compared with GCN,our CAGCN has a better ability to utilize this relationship between components in industrial control *** performances of the model are evaluated on the Secure Water Treatment(SWaT)dataset and the Water Distribution(WADI)dataset,the two most common industrial control systems datasets in the field of industrial anomaly *** experimental results show that our CAGCN achieves better results on precision,recall,and F1 score than the state-of-the-art methods.

关键词： graph convolution network(GCN) data mining network centrality anomaly detection industrial control system

Alternaria TeA toxin activates a chloroplast retrograde signaling pathway to facilitate JAdependent pathogenicity

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Plant Communications 2024年第3期5卷 123-140页

作者： Jiale Shi He Wang Mengping Li Liru Mi Yazhi Gao sheng qiang Yu Zhang Dan Chen Xinbin Dai Hongyu Ma Huan Lu Chanhong Kim Shiguo Chen Weed Research Laboratory Nanjing Agricultural UniversityNanjing 210095China Shanghai Center for Plant Stress Biology Center for Excellence in Molecular Plant SciencesChinese Academy of SciencesShanghai 200032China Bioinformatics and Computational Biology Laboratory Noble Research Institute2510 Sam Noble ParkwayArdmoreOK 73401USA College of Plant Protection Nanjing Agricultural UniversityNanjing 210095China Department of Botany and Plant Biology University of GenevaGenevaSwitzerland

The chloroplast is a critical battleground in the arms race between plants and *** microbe-secreted mycotoxins,tenuazonic acid(TeA),produced by the genus Alternaria and other phytopathogenic fungi,inhibits photosynthesis,leading to a burst of photosynthetic singlet oxygen(1O2)that is implicated in damage and chloroplast-to-nucleus retrograde *** the signicant crop damage caused by Alternaria pathogens,our understanding of the molecular mechanism by which TeA promotes pathoge-nicity and cognate plant defense responses remains *** now reveal that *** induces necrotrophic foliar lesions by harnessing EXECUTER1(EX1)/EX2-mediated chloroplast-to-nucleus retro-grade signaling activated by TeA toxin–derived photosynthetic 1O2 in Arabidopsis *** of the 1O2-sensitive EX1-W643 residue or complete deletion of the EX1 singlet oxygen sensor domain compro-mises expression of 1O2-responsive nuclear genes and foliar *** also found that TeA toxin rapidly induces nuclear genes implicated in jasmonic acid(JA)synthesis and signaling,and EX1-mediated retro-grade signaling appears to be critical for establishing a signaling cascade from 1O2 to *** present study sheds new light on the foliar pathogenicity of ***,during which EX1-dependent 1O2 signaling in-duces JA-dependent foliar cell death.

关键词： TeA mycotoxin Alternaria pathogen chloroplast singlet oxygen retrograde signaling jasmonic acid

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纳米液滴撞击高温平板壁的分子动力学模拟

物理学报 2024年第10期73卷 126-135页

作者：冯山青龚路远权生林郭亚丽沈胜强大连理工大学能源与动力学院热能综合利用技术国家地方联合工程研究中心大连116024

采用分子动力学的方法对纳米液滴撞击高温平板壁面产生的Leidenfrost现象进行了探究,分析了液滴撞击不同温度壁面对Leidenfrost现象的影响.结果表明,随着壁面温度的提升,液滴蒸发的速度更快,脱离壁面的时刻越早,脱离壁面时的速度也越大... 详细信息

采用分子动力学的方法对纳米液滴撞击高温平板壁面产生的Leidenfrost现象进行了探究,分析了液滴撞击不同温度壁面对Leidenfrost现象的影响.结果表明,随着壁面温度的提升,液滴蒸发的速度更快,脱离壁面的时刻越早,脱离壁面时的速度也越大,最终悬浮时液滴体积也越大.通过分析脱离壁面前一时刻液滴内部的密度、温度分布发现,由于高温壁面具有更高的热通量致使蒸发过程更快进而产生更厚的蒸气层,该蒸气层将阻碍换热,使得液滴在壁面温度更高时液滴内部的平均温度越低,且平均密度越小.

关键词：分子动力学液滴 Leidenfrost现象

抗草甘膦转基因油菜和野芥菜回交1代子2代-子6代在无除草剂选择压下的适合度

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Journal of Plant Ecology 2024年第1期17卷 135-147页

作者： Lei Huang Zi-Cheng Shao Ling-Ling Dai Ai-Qin Zheng Qing-Ling Zhang Xiao-Lei Wang sheng qiang Xiao-Ling Song Weed Research Laboratory College of Life SciencesNanjing Agricultural UniversityNanjing 210095China

抗草甘膦转基因油菜和野芥菜回交1代子2代-子6代在无除草剂选择压下的适合度转基因作物的抗性基因能否成功渗入野生或近缘杂草取决于携带转基因回交后代的适合度。为深入了解转基因油菜(Brassica napus)向野芥菜(wild ***)基因流动的生... 详细信息

抗草甘膦转基因油菜和野芥菜回交1代子2代-子6代在无除草剂选择压下的适合度转基因作物的抗性基因能否成功渗入野生或近缘杂草取决于携带转基因回交后代的适合度。为深入了解转基因油菜(Brassica napus)向野芥菜(wild ***)基因流动的生态风险,本文研究了在低密度(5株/m^(2))和高密度(10株/m^(2))下,以及单种和混合种植(野芥菜:BC1F2R-BC1F6R=1:1)下抗草甘膦转基因油菜与野芥菜回交1代子2代到子6代(BC1F2R-BC1F6R)的适合度;并分析回交后代的适合度成分、种植密度和种植方式之间的相关性。研究结果表明:在单种低密度下,与野芥菜相比,回交1代子2代(BC1F2R)和子3代(BC1F3R)具有较低的适合度,而回交1代子4代-子6代(BC1F4R-BC1F6R)具有较高的适合度;无论是单种还是混种,高密度下所有回交后代的适合度均低于野芥菜。相关性分析结果显示,种植密度和种植方式对回交后代(BC1F2R-BC1F6R)的适合度成分有显著影响。这些结果表明,转基因从栽培油菜渗入到野芥菜很大程度上取决于回交后代的特定生长环境。

关键词：野芥菜抗草甘膦转基因油菜回交后代适合度基因漂移

零售收缩背景下商业稳定性的空间规律——以北京前门地区为例

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南方建筑 2024年第4期 12-19页

作者：盛强许泽阳北京交通大学建筑与艺术学院

近年来新冠疫情引发城市部分区域出现零售收缩问题,但也为深入挖掘各类商业变化背后的空间规律提供了机会。基于百度街景时光机和实地调研,详细记录了2017和2022年北京前门地区商业的更名、改行和存续情况,并基于多元回归综合距离、拓... 详细信息

近年来新冠疫情引发城市部分区域出现零售收缩问题,但也为深入挖掘各类商业变化背后的空间规律提供了机会。基于百度街景时光机和实地调研,详细记录了2017和2022年北京前门地区商业的更名、改行和存续情况,并基于多元回归综合距离、拓扑、聚集三种空间规律对各条街道上商铺稳定性的影响,研究发现拓扑规律的影响最为明显,且位于城市尺度高可达性街道的商铺在外部冲击下经营更为稳定。

关键词：商业稳定性空间句法拓扑规律距离规律商业聚集

服务业外资管制放松、营商环境与出口产品质量

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上海对外经贸大学学报 2024年第2期31卷 40-55页

作者：王欢黄胜强上海大学经济学院上海200444 上海海关学院海关与经贸研究院上海201204

本文以中国2000~2013年工业企业和海关数据为样本,实证分析我国服务业外资管制放松对制造业企业的出口产品质量的影响和机制,结果表明服务业外资管制放松可以提高我国制造业企业的出口产品质量。机制分析表明,服务业外资管制放松可以通... 详细信息

本文以中国2000~2013年工业企业和海关数据为样本,实证分析我国服务业外资管制放松对制造业企业的出口产品质量的影响和机制,结果表明服务业外资管制放松可以提高我国制造业企业的出口产品质量。机制分析表明,服务业外资管制放松可以通过缓解企业融资约束、提高服务中间投入来提高出口产品质量,且对外部资本依赖更强和制造业服务化水平更高行业的出口产品质量的提升更显著。异质性分析表明,股权限制和审核审查类型的服务业外资管制放松对出口产品质量的提升更明显,服务业外资管制放松对外资企业、资本密集型行业的出口产品质量提升更突出,并且服务业外资管制放松的正效应受到营商环境的非线性影响,即只有当营商环境超过阈值时,完善的营商环境才能强化服务业外资管制放松的正效应。本文为我国如何利用服务业外资来促进制造业产业升级,以及营造良好的营商环境提供了政策建议。

关键词：外资管制放松出口产品质量融资约束服务中间投入营商环境

Hβ负载Mo基磷化物和硫化物加氢开环催化性能

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石油学报（石油加工） 2024年第5期40卷 1194-1202页

作者：李微李翔彭冲盛强尚森森天津科技大学化工与材料学院天津市卤水化工与资源生态化利用重点实验室天津300457 大连理工大学化工学院精细化工国家重点实验室辽宁大连116024

以Hβ分子筛为载体制备了负载型MoP以及Mo和NiMo硫化物催化剂(分别记作MoP/Hβ、MoS_(2)/Hβ和NiMoS_(2)/Hβ),采用X射线衍射(XRD)、吡啶吸附红外光谱(Py-IR)等手段对催化剂进行表征。以十氢萘作为模型化合物,在温度310℃、氢气压力4.0 ... 详细信息

以Hβ分子筛为载体制备了负载型MoP以及Mo和NiMo硫化物催化剂(分别记作MoP/Hβ、MoS_(2)/Hβ和NiMoS_(2)/Hβ),采用X射线衍射(XRD)、吡啶吸附红外光谱(Py-IR)等手段对催化剂进行表征。以十氢萘作为模型化合物,在温度310℃、氢气压力4.0 MPa、质量空速(MHSV)3.2 h^(-1)和氢/油体积比1000的条件下考察催化剂的加氢开环反应性能。分析表征结果表明:与Hβ分子筛酸性相比,MoP/Hβ、MoS_(2)/Hβ和NiMoS_(2)/Hβ催化剂的酸性均有降低。加氢开环反应性能评价结果表明:MoP/Hβ活性和稳定性均优于MoS_(2)/Hβ和NiMoS_(2)/Hβ;硫化物催化剂在反应初期失活明显,主要归因其氢解活性的降低,金属中心和酸中心可能协同参与了催化十氢萘的缩环和开环反应。十氢萘主要通过缩环反应路径开环,由金属中心催化的直接氢解反应是次要路径,十氢萘的氢解反应优先通过金属环丁烷机理进行。与MoS_(2)/Hβ相比,十氢萘在MoP/Hβ与NiMoS_(2)/Hβ上的氢解反应通过金属环丁烷机理发生的比例更高。

关键词： Hβ分子筛 MoP MoS_(2) NiMo硫化物十氢萘开环反应双功能催化剂