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基于多目标乌鸦搜索算法优化DenseNet图像分类算法研究

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黑龙江科学 2024年第16期15卷 109-112页

作者：胡容俊王正红北华大学计算机科学技术学院吉林吉林132000

图像分类是计算机视觉领域中的关键任务,其目标是将输入的图像分配到预定义的类别中,核心思想是通过学习从图像的局部特征中提取高级抽象表示,使模型能够有效识别并区分不同类别的图像。图像分类已应用于诸多领域,包括医学影像识别、自... 详细信息

图像分类是计算机视觉领域中的关键任务,其目标是将输入的图像分配到预定义的类别中,核心思想是通过学习从图像的局部特征中提取高级抽象表示,使模型能够有效识别并区分不同类别的图像。图像分类已应用于诸多领域,包括医学影像识别、自动驾驶、安全监控等。但图像分类也存在一些问题,如小样本问题、类别不平衡及对抗攻击等。近年来,随着深度学习的迅速发展,卷积神经网络(CNN)在图像分类任务中取得了显著的效果。设计了一种启发式算法,引入多目标乌鸦搜索算法,解决多目标优化问题,通过实验,与其他先进算法进行比较,验证了优化后的DenseNet在图像分类任务上性能有所提升,可优化卷积神经网络模型在图像分类中的应用。

关键词：多目标乌鸦搜索算法密集卷积网络特征提取深度学习图像分类

Designing of anisotropic gradient surfaces for directional liquid transport:Fundamentals,construction,and applications

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The Innovation 2023年第6期4卷 115-131页

作者： Lanlan Hou Xiaofei Liu Xinran Ge rongjun hu Zhimin Cui Nu WangYong Zhao Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Minitry of Education Beijing Key Laboratory of Bioinspired Energy Materials and DevicesSchool of ChemistryBeijing Advanced Innovation Center for Biomedical EngineeringBeihang UniversityBeijing 100191China School of Printing and Packaging Engineer Beijing Institute of Graphic CommunicationBeiing 102600China Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBejjing 100190China Institute of Applied Chemistry Jiangxi Academy of SciencesNanchang 330096China

Many biological surfaces are capable of transporting liquids in a directional manner without energy *** by nature,constructing asymmetric gradient surfaces to achieve desired droplet transport,such as a liquid diode,brings an incredibly valuable and promising area of research with a wide range of *** by advances in nano-technology and manufacturing techniques,biomimetics has emerged as a promising avenue for engineering various types of anisotropic material *** the past few decades,this approach has yielded significant progressin both fundamental understanding and practical *** studies revealed that the heterogeneous composition and topography mainly govern the wetting mechanisms and dynamics behavior of droplets,including the interdisciplinary aspects of materials,chemistry,and *** this review,we provide a concise overview of various biological surfaces that exhibit anisotropic droplet *** discussed the theoretical foundations and mechanisms of droplet motion on designed surfaces and reviewed recent research advances in droplet directional transport on designed plane surfaces and Janus *** liquid-diode materials yield diverse promising applications,involving droplet collection,liquid separation and delivery,functional textiles,and biomedical *** also discuss the recent challenges and ongoing approaches to enhance the functionality and application performance of anisotropic materials.

关键词： anisotropic directional gradient

Electrospinning Janus Nanofibrous Membrane for Unidirectional Liquid Penetration and Its Applications

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Chemical Research in Chinese Universities 2021年第3期37卷 337-354页

作者： HOU Lanlan LIU Jingchong LI Dianming GAO Yuan WANG Yaqiong hu rongjun REN Wen XIE Shuixiang CUI Zhimin WANG Nü State Key Laboratory of Petroleum Pollution Control CNPC Research Institute of Safety and Environmental TechnologyBeijing102206P.R.China Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education Beijing Key Laboratory of Bioinspired Energy Materials and DevicesSchool of ChemistryBeijing Advanced Innovation Center for Biomedical EngineeringBeihang UniversityBeijing100191P.R.China

Janus membrane with opposite wettability on its two sides has witnessed an explosion of interest in the field of liquid spontaneous and directional transport for their promising *** advances in fabrication technology and natural bionics have brought remarkable progress for the development of Janus *** the exciting progress,the micro/nanofabrication technique of electrospinning shows advantages in constructing thin porous fibrous membrane materials with controllable surface wettability and hierarchical ***,a brief review of bioinspired Janus membrane for unidirectional liquid penetration fabricated by electrospinning is presented,and the underlying scientific mechanism is discussed with an emphasis on the materials design involving asymmetric surface wettability and micro-topology *** overview of recent emerging applications is also reviewed,with special attentions to liquid separation,water collection,distillation,and smart textile,*** researchers keep to develop more efficient strategies on designing new Janus membrane with higher performances,it has become increasingly important to understand the mechanism of liquid moving dynamics at the asymmetric interface in order to better recognize the scientific limitations currently hindering the field *** last,the challenges currently faced and possible strategies on developing new Janus membranes for optimization and engineering in the future are proposed.

关键词： Electrospinning Nanofiber Janus membrane Unidirectional penetration Wettability gradient

Monitoring and engineering interface coupling between monolayer WS_(2)and substrate through controllably introducing interfacial strain

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Science China Materials 2024年第9期67卷 3012-3020页

作者： Xiaofei Yue Jiajun Chen Jinkun Han Yabing Shan Shuwen Shen Wenxuan Wu Bingjie Liu Lijia Li Yu Chen rongjun Zhang Laigui hu Ran Liu Zhijun Qiu Chunxiao Cong School of Information Science and Technology Fudan UniversityShanghai200433China Commonwealth Scientific and Industrial Research Organization(CSIRO) ClaytonVictoria3168Australia Yiwu Research Institute of Fudan University Yiwu322000China

The interface properties in two-dimensional(2D)layered materials and their van der Waals(vdW)homo-/heterostructures are of importance in both uncovering novel physical phenomena and optimizing device *** considerable research interest and enthusiasm direct toward the interlayer coupling in 2D homo-and heterostructures,there is limited research on the coupling at the 2D layered material-substrate *** limitation is due to the challenges in achieving direct ***,the coupling mechanisms at the 2D layered material-substrate interface is ambiguous,which needs greater *** this study,we have systematically investigated the interface coupling between monolayer WS_(2)and its supported substrates using high-temperature and high-vacuum in-situ Raman spectroscopy through monitoring the low-frequency Raman mode of monolayer WS_(2).Our findings reveal that both interfacial spacing and strain can significantly affect the coupling strength between the monolayer WS_(2)and the supported *** notably,we found that the strategic introduction of appropriate interfacial strain can effectively enhance the interface ***,we have succeeded in achieving effective regulation of the sample-substrate coupling via a convenient way of controlling the cooling process during *** findings contribute to a deeper understanding of the coupling correlation between 2D layered materials and substrates,which is of great significance for the design and optimization of high-performance devices based on 2D layered semiconductors.

关键词： two-dimensional layered material substrate interface coupling low-frequency Raman mode interfacial spacing interfacial strain

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公路隧道二衬钢筋装配化螺栓的接头设计

北京交通大学学报 2024年第1期48卷 54-65页

作者：王永东胡志豪任雨桐薛威史林猛郑蓉军长安大学公路学院西安710064

针对公路隧道二衬钢筋现场焊接、绑扎效率低、质量控制难度大的弊端,基于直线型混凝土软化本构模型及钢筋应力应变关系,推导得到钢筋混凝土衬砌截面的极限承载力计算式.结合螺栓连接面极限承载力,以应力分布系数作为控制因素,将轴心压... 详细信息

针对公路隧道二衬钢筋现场焊接、绑扎效率低、质量控制难度大的弊端,基于直线型混凝土软化本构模型及钢筋应力应变关系,推导得到钢筋混凝土衬砌截面的极限承载力计算式.结合螺栓连接面极限承载力,以应力分布系数作为控制因素,将轴心压缩状态、大小偏心分界点以及纯弯状态时的最危险截面作为特征截面,控制钢筋混凝土截面极限承载力以及螺栓连接面极限承载力在特征截面处的大小,得到连接面处螺栓的设计方法 .选取某隧道隧址围岩参数及其断面尺寸、支护参数,运用得到的螺栓设计方法进行螺栓选型并设计连接面处的螺栓分布,给出钢筋预制节段的划分方案,通过数值模拟验证了二衬钢筋装配化螺栓的接头设计的合理性.研究结果表明:钢筋骨架采用螺栓装配化预制连接后,二衬结构的应力进行了重分布,应力与变形的增长速率放缓,并逐渐稳定.最终,左拱肩和左拱脚处的应力分别降低58%和53%,位移量同样有不同程度的降低;在拱底螺栓连接面,应力相较提高,但由于螺栓的高承载性能,隆起量反而有所降低,充分发挥了螺栓的性能,实现了结构优化.

关键词：隧道工程二衬钢筋装配化极限承载力螺栓接头设计结构优化

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校企合作模式下基于OBE理念的实践类课程设计

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实验室研究与探索 2024年第5期43卷 182-187页

作者：胡玮尹仕陈庆叶海鹏谢荣军肖波华中科技大学电气与电子工程学院武汉430074 三峡大学电气与新能源学院湖北宜昌443002 ABB(中国)有限公司北京100020

基于成果导向教育(OBE)的课程设计理念,设计了“智慧电力工程训练营”实践课程的整体教学模式。该课程通过与ABB集团合作的形式,构建了具有实际工程意义的综合设计内容,并按照反向设计原则,对各个知识点进行综合整理,设计出2周的课程教... 详细信息

基于成果导向教育(OBE)的课程设计理念,设计了“智慧电力工程训练营”实践课程的整体教学模式。该课程通过与ABB集团合作的形式,构建了具有实际工程意义的综合设计内容,并按照反向设计原则,对各个知识点进行综合整理,设计出2周的课程教学结构和课堂教学模式,逐步实现学生的最终学习目标。在此基础上,通过教学评价体系综合评定每位学生的最终成绩。该课程的教学模式及其实施路径对于本科实践类课程设计具有较好的借鉴和推广价值。

关键词：智慧电力工程训练营实践类课程校企合作成果导向教育反向设计教学模式

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复合微生物菌剂对水稻稻瘟病的生防效应

微生物学通报 2024年第2期51卷 483-493页

作者：胡展付祖姣郭照辉肖蓉罗容珺杨华伍善东湖南省微生物研究院湖南长沙410009

【背景】单一生防菌剂存在生防效果不够稳定、持效性差等不足,研究不同功能微生物的协同增效作用,开发复合微生物菌剂是控制植物病害的有效途径之一。【目的】探究不同功能微生物组合后对水稻稻瘟病的生防效应,开发高效生防水稻稻瘟病... 详细信息

【背景】单一生防菌剂存在生防效果不够稳定、持效性差等不足,研究不同功能微生物的协同增效作用,开发复合微生物菌剂是控制植物病害的有效途径之一。【目的】探究不同功能微生物组合后对水稻稻瘟病的生防效应,开发高效生防水稻稻瘟病的复合微生物菌剂。【方法】将多株高效拮抗稻瘟病菌的链霉菌和细菌进行两两组合后与助剂复配,通过盆栽和大田试验,研究了复合微生物菌剂对水稻稻瘟病的生防效应。【结果】链霉菌Ahn75和解淀粉芽孢杆菌CWJ2菌株组合效果最好,与助剂复配后对水稻叶瘟和穗颈瘟的盆栽防效分别达到65.07%和63.00%,显著高于单一菌株Ahn75、CWJ2和其他菌剂组合的生物防效。同时,该复合菌剂能有效促进水稻植株生长,盆栽分蘖数和株高与对照相比分别提高93.33%和9.83%。而且,田间小区试验的结果也表明,该复合微生物菌剂的使用可以有效降低稻瘟病的发病,防效最高可达52.16%,与农药三环唑的防效(52.97%)相当。此外,菌株Ahn75和CWJ2分别对14种和16种稻瘟病病原菌生理小种的抑菌率超过50%,表明(Ahn75+CWJ2)复合菌剂对水稻稻瘟病具有广谱抗性。【结论】复合微生物菌剂(Ahn75+CWJ2)在防治水稻稻瘟病方面具有较高的潜能,可用于生物农药的开发与应用。

关键词：复合微生物菌剂水稻稻瘟病生防效应助剂