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Adaptive Graph Convolutional Adjacency Matrix Network for Video Summarization

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Computers, Materials & Continua 2024年第8期80卷 1947-1965页

作者： Jing Zhang Guangli Wu Shanshan song School of Cyberspace Security Gansu University of Political Science and LawLanzhou730000China

Video summarization aims to select key frames or key shots to create summaries for fast retrieval,compression,and efficient browsing of *** neural networks efficiently capture information about graph nodes and their neighbors,but ignore the dynamic dependencies between *** address this challenge,we propose an innovative Adaptive Graph Convolutional Adjacency Matrix Network(TAMGCN),leveraging the attention mechanism to dynamically adjust dependencies between graph ***,we first segment shots and extract features of each frame,then compute the representative features of each ***,we utilize the attention mechanism to dynamically adjust the adjacency matrix of the graph convolutional network to better capture the dynamic dependencies between graph ***,we fuse temporal features extracted by Bi-directional Long Short-Term Memory network with structural features extracted by the graph convolutional network to generate high-quality *** experiments are conducted on two benchmark datasets,TVSum and SumMe,yielding F1-scores of 60.8%and 53.2%,*** results demonstrate that our method outperforms most state-of-the-art video summarization techniques.

关键词： Attention mechanism deep learning graph neural network key-shot video summarization

Parameterization of height-diameter and crown radius-diameter relationships across the globe

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Journal of Plant Ecology 2024年第2期17卷 36-48页

作者： Xiang song Jinxu Li Xiaodong Zeng International Center for Climate and Environment Sciences Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China School of Mathematics and Statistics North China University of Water Resources and Electric PowerZhengzhou 450046China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China

The tree height-diameter at breast height(H-DBH)and crown radius-DBH(CR-DBH)relationships are key for forest carbon/biomass estimation,parameterization in vegetation models and vegetation-atmosphere *** the H-DBH relationship has been widely investigated on site or regional scales,and a few of studies have involved CR-DBH relationships based on plot-level data,few studies have quantitatively verifed the universality of these two relationships on a global *** study evaluated the ability of 29 functions to ft the H-DBH and CR-DBH relationships for six different plant functional types(PFTs)on a global scale,based on a global plant trait *** showed that most functions were able to capture the H-DBH relationship for tropical PFTs and boreal needleleaf trees relatively accurately,but slightly less for temperate PFTs and boreal broadleaf trees(BB).For boreal PFTs,the S-shaped Logistic function ftted the H-DBH relationship best,while for temperate PFTs the Chapman-Richards function performed *** tropical needleleaf trees,the fractional function of DBH satisfactorily captured the H-DBH relationship,while for tropical broadleaf trees,the Weibull function and a composite function of fractions were the best *** CR-DBH,the ftting capabilities of all the functions were comparable for all PFTs except *** Logistic function performed best for two boreal PFTs and temperate broadleaf trees,but for temperate needleleaf trees and two tropical PFTs,some exponential functions demonstrated higher *** work provides valuable information for parameterization improvements in vegetation models and forest feld investigations.

关键词： tree height diameter at breast height crown radius ftting function parameterization vegetation model

Adaptation of Ocular Opponency Neurons Mediates Attention-Induced Ocular Dominance Plasticity

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Neuroscience Bulletin 2024年第3期40卷 339-349页

作者： Fangxing song Lili Lyu Min Bao CAS Key Laboratory of Behavioral Science Institute of PsychologyChinese Academy of SciencesBeijing100101China Department of Psychology University of Chinese Academy of SciencesBeijing100049China Institute of Neuroscience Key Laboratory of Primate NeurobiologyCAS Center for Excellence in Brain Science and Intelligence TechnologyChinese Academy of SciencesShanghai200031China

Previous research has shown that ocular dominance can be biased by prolonged attention to one *** ocular-opponency-neuron model of binocular rivalry has been proposed as a candidate account for this *** direct neural evidence is still *** manipulating the contrast of dichoptic testing gratings,here we measured the steady-state visually evoked potentials(SSVEPs)at the intermodulation frequencies to selectively track the activities of ocular-opponency-neurons before and after the“dichoptic-backward-movie”*** hour of adaptation caused a shift of perceptual and neural ocular dominance towards the unattended *** importantly,we found a decrease in the intermodulation SSVEP response after adaptation,which was significantly greater when high-contrast gratings were presented to the attended eye than when they were presented to the unattended *** results strongly support the view that the adaptation of ocular-opponency-neurons contributes to the ocular dominance plasticity induced by prolonged eye-based attention.

关键词： Attention Ocular dominance Opponency neuron Adaptation Steady-state visually evoked potential

耦合膜分离的新型CO2低温捕集系统性能优化

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化工进展 2020年第7期39卷 2884-2892页

作者：田华孙瑞宋春风邓帅石凌峰康克舒歌群天津大学内燃机燃烧学国家重点实验室天津300072 天津大学环境科学与工程学院天津300072 中低温热能高效利用教育部重点实验室(天津大学) 天津300350

CO2捕集作为温室气体排放控制的有效手段已成为重要研究课题。作为新兴捕集技术之一,低温CO2捕集因产品纯度高、无附加污染等优势受到关注。然而,该技术能耗和捕集率对于气体中CO2浓度十分敏感,对于高CO2浓度气体可获得较高的CO2捕集率... 详细信息

CO2捕集作为温室气体排放控制的有效手段已成为重要研究课题。作为新兴捕集技术之一,低温CO2捕集因产品纯度高、无附加污染等优势受到关注。然而,该技术能耗和捕集率对于气体中CO2浓度十分敏感,对于高CO2浓度气体可获得较高的CO2捕集率和较低能耗水平。基于此,本文提出了耦合膜分离的新型CO2低温捕集系统,通过膜材料选择渗透性实现待捕集气体CO2浓度主动调控,并在最优浓度下进行CO2低温捕集。首先基于不同传统低温捕集系统特点,对比分析了不同耦合系统模式,从而确定了最优耦合系统结构。针对最优耦合系统进行了运行参数优化,并分别基于实现系统捕集能耗最低与捕集率最高的目标,获得了膜渗透侧CO2浓度与进气CO2浓度间的关系式,为该耦合系统中膜组件选型提供指导。研究表明,本文提出的耦合系统捕集能耗为1.92MJ/kgCO2,相比于传统单一低温系统捕集能耗可降低16.5%。

关键词：二氧化碳捕集低温膜耦合系统优化

基于psbA-trnH序列变异分析川明参属亲缘关系及分类地位

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植物资源与环境学报 2014年第2期23卷 19-26页

作者：宋春凤吴宝成周伟刘启新江苏省.中国科学院植物研究所(南京中山植物园) 江苏南京210014

采用PCR直接测序法对伞形科（ Apiaceae）前胡族（ Trib. Peucedaneae）种类川明参（ Chuanminshen violaceum Sheh et Shan）、泰山前胡〔Peucedanum wawrae （ H. Wolff） Su〕和华中前胡（ P. medicum Dunn）以及美味芹族（ Trib. Smyrnieae）种类明党参（Changium smyrnioides H. Wolff）、宝兴棱子芹（Pleurospermum davidii Franch.）、丽江棱子芹（ P. foetens Franch.）和鸡冠棱子芹（ P. cristatum de Boiss.）的叶绿体基因组psbA-trnH片段进行了扩增测序,获得的序列已提交至GenBank,登录号为KF557756-KF557762。结合引自GenBank的前胡族阿魏属（ Ferula Linn.）1种、大瓣芹属（ Semenovia Regel et Herder）1种、当归属（ Angelica Linn.）2种和美味芹族的舟瓣芹属（ Sinolimprichtia H. Wolff）1种、羌活属（ Notopterygium de Boiss.）1种、瘤果芹属（ Trachydium Lindl.）1种以及针果芹族（ Trib. Scandicineae）刺果芹〔Turgenia latifolia （ Linn.） Hoffm.〕的psbA-trnH片段序列,对各种类的psbA-trnH片段信息进行分析；并以刺果芹为外类群构建了MP、ML和BI系统发育树。结果表明：川明参和明党参的psbA-trnH片段长度均为258 bp、GC含量均为23％,而其他种类的psbA-trnH片段长度为228~405 bp、GC含量为26％~35％；排序后psbA-trnH 序列总长度为553 bp（包括空位）,其中变异位点237个、信息位点178个。川明参与明党参间的相对遗传距离最小（仅为0.02）,而川明参与其他种类间的相对遗传距离为0.10~1.34,且总体上川明参与美味芹族种类的相对遗传距离较小,表明川明参与明党参及美味芹族种类的亲缘关系较近。在3类系统树上,川明参与明党参均聚在一起,并与美味芹族的属种聚为一大支,而远离由前胡族属种构成的另一大支。结合外部形态和果实解剖结构特征,建议将川明参属（ Chuanminshen Sheh et Shan ）从前胡族中分出并置于美味芹族中,与明党参属（ Changium H. Wolff）为姐妹类群。

关键词：川明参属 psbA-trnH片段美味芹族前胡族 GC含量分类地位

Graphene-anchored sodium single atoms:A highly active and stable catalyst for transesterification reaction

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Nano Research 2024年第6期17卷 4979-4985页

作者： song-song Peng Yao Nian Xing-Ru song Xiang-Bin Shao Chen Gu Zhi-Wei Xing Shi-Chao Qi Peng Tan You Han Xiao-Qin Liu Lin-Bing Sun State Key Laboratory of Materials-Oriented Chemical Engineering Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)College of Chemical EngineeringNanjing Tech University30 South Puzhu RoadNanjing 211816China School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China

Solid strong base catalysts have received considerable attention in various organic reactions due to their facile separation,neglectable corrosion,and environmental *** great progress has been made in the preparation of solid strong base catalysts,it is still challenging to avoid basic sites aggregation on support and active sites loss in reaction ***,we report a tandem redox strategy to prepare Na single atoms on graphene,producing a new kind of solid strong base catalyst(Na1/G).The base precursor NaNO_(3)was first reduced to Na2O by graphene(400℃)and successively to single atoms Na anchored on the graphene vacancies(800℃).Owing to the atomically dispersed of basicity,the resultant catalyst presents high activity toward the transesterification of methanol and ethylene carbonate to synthesize dimethyl carbonate(turnover frequency(TOF)value:125.7 h^(−1)),which is much better than the conventional counterpart Na2O/G and various reported solid strong bases(TOF:1.0-90.1 h^(−1)).Furthermore,thanks to the basicity anchored on graphene,the Na1/G catalyst shows excellent durability during *** work may provide a new direction for the development of solid strong base catalysts.

关键词： solid strong base catalyst basic sites redox graphene single Na atoms

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乳猪颗粒料加工工艺对产品品质影响的研究

粮食与饲料工业 2010年第6期 38-40页

作者：宋春风王红英李书红中国农业大学工学院北京100083 河北农业大学食品科技学院河北保定071000

从国内乳猪颗粒料的主要生产工艺出发,总结了目前各关键工艺参数的控制对产品品质影响的研究现状。通过选取适当的参数指标,其中关键工艺参数选取原料膨化度,原料粉碎粒度、喂料速度、调质时间、调质温度、制粒机特性、冷却时间等,产品... 详细信息

从国内乳猪颗粒料的主要生产工艺出发,总结了目前各关键工艺参数的控制对产品品质影响的研究现状。通过选取适当的参数指标,其中关键工艺参数选取原料膨化度,原料粉碎粒度、喂料速度、调质时间、调质温度、制粒机特性、冷却时间等,产品品质选取淀粉糊化度和颗粒硬度,总结归纳了各参数与产品品质之间的关系,比较系统地分析了加工工艺对产品品质的影响特点和规律,对乳猪颗粒料的实际生产具有一定的指导意义。

关键词：乳猪颗粒料加工工艺工艺参数产品品质

A novel cylindrical sandwich plate inspired by beetle elytra and its compressive properties

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Science China Technological Sciences 2024年第11期67卷 3465-3476页

作者： song YiHeng RUAN SiHan HAO Ning OKABE YoJi School of Engineering The University of Tokyo School of Civil Engineering Southeast University School of Engineering RMIT University Institute of Industrial Science The University of Tokyo

The design and experimental analysis of a semi-cylindrical structure known as the cylindrical beetle elytron plate(CBEP) were presented. Radial compression tests and finite element simulation were performed on CBEPs under 30° and 45° inclined sliding support constraints, with a comparison made to cylindrical honeycomb plate(CHP). The study aims to investigate the superior compression performance and enhancement mechanisms of CBEPs. The results demonstrate that CBEPs exhibit a 14%–26% increase in specific load-bearing capacity and a 20% increase in specific energy absorption compared with CHPs with equal core wall thickness. Distinct “Z-shaped” tearing failures were observed, with honeycomb plates showing tearing at the center of the honeycomb walls, while beetle elytron plates exhibited tearing along the midline of the trabeculae. Three different stress patterns,including elastic-plastic development stage of arch, plastic hinge node stage, and rigid node stage, were identified and analyzed to explain the mechanical performance improvements and failure characteristics. Considering that structural damage to trabeculae mostly occurs at its junction with the skin, it is recommended to add chamfers to the junctions of CBEP. Therefore, this paper lays the groundwork for the engineering application of CBEP.

关键词： beetle elytron cylindrical beetle elytron plate compression performance failure characteristics enhancement mechanism

An artificial interphase enables stable PVDF-based solid-state Li metal batteries

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Nano Research 2024年第3期17卷 1482-1490页

作者： Mengjun Wu Jiangping song Jiaheng Lei Haolin Tang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Department of Chemistry School of ChemistryChemical Engineering and Life SciencesWuhan University of TechnologyWuhan 430070China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan 528200China

Composite polymer electrolytes(CPEs)have attracted much attention for high energy density solid-state lithium-metal batteries owing to their flexibility,low cost,and easy ***,the unstable Li/CPE interface is always challengeable for the practical utilization of ***,a polymer interlayer containing K+prepared by ultraviolet(UV)-curing precursor solution is coated on Li surface to stabilize the interface between poly(vinylidene difluoride)(PVDF)composite electrolytes and Li *** from the physical barrier of the interlayer,the continuous decomposition of PVDF is restrained and the intimate contact between electrode and electrolyte is also achieved to reduce the interface ***,the added K+is utilized to further regulate smooth Li *** a consequence,the symmetric Li|Li cell with coated Li demonstrates steady cycling at 0.4 mAh·cm^(-2) and a high critical current density of 1 mA·cm^(-2).The assembled Li|LiFePO_(4) cell presents outstanding cycling stability(capacity retention of 90%after 400 cycles at 1 C)and good rate *** associated pouch cell performs impressive flexibility and *** work provides a convenient strategy to achieve stable Li/PVDF interface for high-performance PVDF-based solid state Li metal batteries.

关键词： interfacial modification solid-state batteries composite polymer electrolytes interfacial compatibility lithium dendrite