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志愿服务融入高校资助育人的价值蕴意与实现路径

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大学（研究与管理） 2024年第6期 30-33页

作者：张蓉张发宇车子杰合肥工业大学微电子学院安徽合肥230009

随着我国社会经济的快速发展和资助政策的不断完善,高校资助育人工作也面临着新机遇和新挑战。志愿服务作为高校育人的重要载体,与资助育人工作相结合,具有思想政治教育价值、感恩意识培育价值和素质能力提升价值,通过统筹规划、创新实... 详细信息

随着我国社会经济的快速发展和资助政策的不断完善,高校资助育人工作也面临着新机遇和新挑战。志愿服务作为高校育人的重要载体,与资助育人工作相结合,具有思想政治教育价值、感恩意识培育价值和素质能力提升价值,通过统筹规划、创新实践、全程激励、宣传引导四个途径充分利用志愿服务这一载体,可以丰富资助育人体系,有效提升资助育人实效。

关键词：高校资助志愿服务资助育人

新型空心管状翼缘钢板组合梁设计理念与力学性能

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建筑钢结构进展 2024年第1期26卷 77-85页

作者：马海英李清岭石雪飞刘强张印周子杰同济大学土木工程学院上海200092 中国土木工程集团有限公司北京100038 上海市建筑科学研究院有限公司上海201108

工字钢组合梁桥正朝着少主梁、精简横向联系的方向发展。与传统多主梁复杂横向联系组合梁桥相比,双主梁桥由于采用了开口截面的结构形式,极大地削弱了其抗扭能力,在偏载作用下会产生较大的变形及翘曲应力,使钢主梁处于弯扭耦合的受力状... 详细信息

工字钢组合梁桥正朝着少主梁、精简横向联系的方向发展。与传统多主梁复杂横向联系组合梁桥相比,双主梁桥由于采用了开口截面的结构形式,极大地削弱了其抗扭能力,在偏载作用下会产生较大的变形及翘曲应力,使钢主梁处于弯扭耦合的受力状态。空心管状翼缘钢板组合梁采用空心钢管取代传统的平板上翼缘,提升了稳定性,改善了结构性能。本文通过理论分析和实体有限元法的计算,研究了单梁在自重与横向风荷载作用下的稳定性;对非组合截面的组合体系下的稳定性能进行了分析与比较,并分离出扭转翘曲应力和纵向正应力,研究了不同跨径下扭转效应的影响。最后,对横向联系、加劲肋的影响进行了分析。研究结果表明,空心管状翼缘钢板组合梁桥扭转刚度大于传统工字形截面组合梁扭转刚度,自身横向稳定性好,并且需要较少的横向联系与加劲肋,可实现单梁吊装,避免采用过多临时加固及支撑措施,提高施工效率。

关键词：钢板组合梁矩形管翼缘扭转刚度稳定有限元分析

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不含悬挂点的双圈图及三圈图的谱半径

合肥学院学报（综合版） 2024年第2期41卷 15-21,27页

作者：张子杰蔡改香安庆师范大学数理学院安徽安庆246133

无符号拉普拉斯谱研究的目的是通过分析图像或数据的频域特征来实现特定任务。图的顶点度矩阵与邻接矩阵的和称为无符号拉普拉斯矩阵,连通图的无符号拉普拉斯矩阵是非负不可约矩阵,其最大特征值被称为无符号拉普拉斯谱半径。满足边数与... 详细信息

无符号拉普拉斯谱研究的目的是通过分析图像或数据的频域特征来实现特定任务。图的顶点度矩阵与邻接矩阵的和称为无符号拉普拉斯矩阵,连通图的无符号拉普拉斯矩阵是非负不可约矩阵,其最大特征值被称为无符号拉普拉斯谱半径。满足边数与顶点数差为1的图被称为双圈图,边数与顶点数差为2的图被称为三圈图。图谱问题一直是图论中的热点研究问题,文章分别确定了所有不含悬挂点的双圈图及三圈图的图类中具有最大无符号拉普拉斯谱半径的图的结构。

关键词：无符号拉普拉斯谱半径双圈图三圈图

Safety,immunogenicity,and preliminary efficacy of a randomized clinical trial ofomicron XBB.1.5-containing bivalent mRNA vaccine

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hLife 2024年第3期2卷 113-125页

作者： Xuanjing Yu Wei Yang Wei Li Na Wan Guanghong Yan Zumi Zhou Xiao Zhu Wei Su Yani Li Chenyu Xing Sifan Duan Houze Yu Xinshuai Zhao Chunmei Li Taicheng Zhou Dingyun You Jia Wei zijie zhang State Key Laboratory for Conservation and Utilization of Bio-Resource and School of Life Sciences Yunnan UniversityYunnanChina Southwest United Graduate School YunnanChina State Key Laboratory of Genetic Engineering School of Life SciencesZhongshan HospitalFudan UniversityShanghaiChina Yunnan Vaccine Laboratory YunnanChina School of Public Health Kunming Medical UniversityYunnanChina Yunnan Genvoo Biotech Ltd. YunnanChina Central Lab and Liver Disease Research Center The Affiliated Hospital of Yunnan UniversityYunnan UniversityYunnanChina

Periodically updating coronavirus disease 19(COVID-19)vaccines that offer broad-spectrum protection is needed giventhe strong immune evasion by the circulating omicron *** effectiveness of prototype and BA.4/5-containing bivalent mRNA vaccines is reduced when XBB subvariants *** initiated an observer-blinded,threearms study in 376 patients in Chinese individuals aged from 18 to 55 years old who had previously received three dosesCOVID-19 *** in terms of neutralizing antibodies elicited by a 30-mg dose of XBB.1.5-containingbivalent vaccine(RQ3027),a 30-mg dose of BA.2/BA.5-Alpha/Beta bivalent vaccine(RQ3025)and their precedent 30-mg Alpha/Beta(combined mutations)monovalent mRNA vaccine(RQ3013)and safety are primary and secondary endpoints,*** recorded prescribed COVID-19 cases to explore the preliminary efficacy of three ***3027 and RQ3025 boosters elicited superior neutralizing antibodies(NAbs)against XBB.1.5,XBB.1.16,XBB.1.9.1,and JN.1 compared to RQ3013 at day 14 in participants without SARS-CoV-2 *** study vaccines were welltolerated without serious adverse reactions *** incidence rates per 1000 person-years of COVID-19 casesduring the 2nd-19th week after randomization were lowest in ***,our data show that XBB.1.5-containingbivalent booster generated superior immunogenicity and better protection against newer severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)variants compared to BA.2/BA.5-containing bivalent and Alpha/Beta monovalentwith no new safety concerns.

关键词： severe acute respiratory syndrome coronavirus 2(SARS-CoV-2) JN.1 XBB lineages coronavirus disease19(COVID-19)vaccine mRNA bivalent vaccine randomized clinical trial

Recent progress of in-fiber WGM microsphere resonator

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Frontiers of Optoelectronics 2023年第2期16卷 29-66页

作者： Yong Yang zijie Wang Xiaobei zhang Qi zhang Tingyun Wang Key Laboratory of Specialty Fiber Optics and Optical Access Networks Joint International Research Laboratory of Specialty Fiber Optics and Advanced CommunicationShanghai Institute for Advanced Communication and Data Science Shanghai University

In-fiber whispering gallery mode(WGM) microsphere resonators have received remarkable attention due to the superiorities of compact structure, high stability and self-alignment. As an in-fiber structure, WGM microsphere resonators have been demonstrated in various applications, such as sensors, filters and lasers, which have significant impacts on modern optics. Herein, we review recent progress of in-fiber WGM microsphere resonators, which involve fibers of diverse structures and microspheres of different materials. First, a brief introduction is given to in-fiber WGM microsphere resonators, from structures to applications. Then, we focus on recent progresses in this field, including in-fiber couplers based on conventional fibers, capillaries and micro-structure hollow fibers, and passive/active microspheres. Finally, future developments of the in-fiber WGM microsphere resonators are envisioned.

关键词： Whispering gallery mode Microsphere resonator In-fiber device Sensor

Study on the epoxidation of olefins with H_(2)O_(2)catalyzed by biquaternary ammonium phosphotungstic acid

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Chinese Journal of Chemical Engineering 2023年第6期58卷 146-154页

作者： zijie zhang Qianyu Zha Ying Liu Zhibing zhang Jia Liu Zheng Zhou School of Chemistry and Chemical Engineering Nanjing UniversityNanjing 210093China

Selective epoxidation of olefins is an important field in chemical *** this work,we developed a new phosphotungstic acid catalyst{[(C_8H_(17))(CH_(3))_(2)N]_(2)(CH_(2))_(3)}_(1.5){PO_(4)[WO(O_(2))_(2)]_(4)}with long carbon chain and biquaternary ammonium *** could be epoxidized to cyclohexene oxide in 96.3%conversion and 98.2%*** catalyst type,solvent type,catalyst loading,initial molar ratio,temperature,cycle performance and substrate extensibility were studied and optimized,the kinetic parameters about overall reaction and unit reaction were also *** light scattering analysis was carried out to explain the different catalytic performance between catalysts with different carbon chain *** novel catalyst and the corresponding dynamics and mechanism study could probably help the industrial application on the epoxidation of cyclohexene with H_(2)O_(2).

关键词： Epoxidation of olefins Phosphotungstic acid Cyclohexene Kinetic study

基于YLG-CNN网络的目标识别与抓取位姿检测技术

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四川轻化工大学学报（自然科学版） 2024年第5期37卷 78-86页

作者：王艺成张国良汪坤张自杰四川轻化工大学自动化与信息工程学院四川宜宾644000 人工智能四川省重点实验室四川宜宾644000

针对现有的抓取位姿检测算法难以实现高精度按类抓取的问题,设计了一种基于深度和语义信息的抓取位姿检测网络YLG-CNN。首先,对抓取检测算法GG-CNN进行改进,在特征提取模块添加残差结构,以融合不同层次的特征,提升检测模型对深度信息的... 详细信息

针对现有的抓取位姿检测算法难以实现高精度按类抓取的问题,设计了一种基于深度和语义信息的抓取位姿检测网络YLG-CNN。首先,对抓取检测算法GG-CNN进行改进,在特征提取模块添加残差结构,以融合不同层次的特征,提升检测模型对深度信息的理解能力,在残差结构末端引入CBAM注意力机制,使宜于作为抓取中心的热力像素点获得更高的热力值,得到更为可靠的抓取位姿;其次,通过YOLOv5算法获取待抓取目标的类别,并将其映射到改进GG-CNN所输出的抓取热力图中,为每个抓取点赋予抓取对象的语义信息,实现按类抓取。最后,设计了一套基于机器人操作系统(ROS)的3D视觉智能抓取系统,通过真实抓取实验验证所提方法。实验结果表明,所提的残差注意力抓取网络可抓取精度达到78.2%,较次优算法GGCNN+CBAM提高6.8%,并且YLG-CNN分类抓取网络能够实现高精度的分类抓取,其平均抓取成功率达到78.3%,较于GG-CNN+YOLOv5算法提升了17.1%。

关键词：目标识别抓取位姿检测 GG-CNN 残差网络分类抓取

Turned off Characteristics of Linear Ultrasonic Motor

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Transactions of Nanjing University of Aeronautics and Astronautics 2017年第1期34卷 49-54页

作者： zhang Jun Shi Yunlai Niu zijie Liang Dazhi State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and Astronautics College of Mechanical and Electronic Engineering Northwest Agriculture and Forestry University

The high controllability and high resolution control of linear ultrasonic motors depend on effective control of driving *** a good control characteristic,step control which the driver output turned off and on was ***,a novel dual PWM topology structure ultrasonic motor driver was designed and *** to the characteristics of the circuits,two kinds of hardware turned off methods named methods A and B were *** differences of the voltage applied on motor by different methods were figured ***,a series of experiments were carried out in the clean room to study the influence of step characteristic by different turn off *** experimental results show that the steplength was 230 nm by method A and 125 nm by method B,while cycles of driving signals were *** method B has a smaller steplength when cycles are *** average steplength varies in non-linear while driving cycles *** steplength varies approximately in linear while voltage amplitude ***,method B is better to implement step control,because it gets a better control in positioning system.

关键词： linear ultrasonic motor turned off characteristics step control steplength

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中国森林生态系统林冠层降雨截留特征

生态学报 2024年第7期44卷 2981-2992页

作者：邓雅丽赵新宇崔自杰冯英杰张卫强刘效东华南农业大学林学与风景园林学院广州510642 广东省森林培育与保护利用重点实验室/广东省林业科学研究院广州510520

森林生态系统作为陆地生态系统的主体,其发达的林冠层通过调节降水量、改变降水强度等深刻影响着流域全过程水文通量及水分输出。以中国广泛开展的典型森林降雨再分配过程的年尺度监测数据为基础,揭示中国不同类型森林生态系统的降雨再... 详细信息

森林生态系统作为陆地生态系统的主体,其发达的林冠层通过调节降水量、改变降水强度等深刻影响着流域全过程水文通量及水分输出。以中国广泛开展的典型森林降雨再分配过程的年尺度监测数据为基础,揭示中国不同类型森林生态系统的降雨再分配及林冠层降雨截留特征,阐明森林生态系统林冠层截留特征与降雨、植被要素的关系。结果表明:我国不同森林生态系统年穿透雨量处于141.4—2450.0 mm之间,年穿透雨率为36.3%—92.3%。5种典型森林生态系统多年平均穿透雨量((445.3±252.9)—(1230.6±479.6)mm)占同期多年平均降雨量的(72.6±9.2)%—(77.4±8.9)%。不同森林生态系统年树干茎流量介于0—508.2 mm之间,占同期年降雨量的0—25.8%。5种典型森林生态系统树干茎流量多年平均值((9.8±17.3)—(87.8±81.6)mm)占同期多年平均降雨量的(1.4±1.9)%—(5.4±4.6)%。不同森林生态系统林冠层年降雨截留范围在25.7—812.9 mm之间,占年降雨量的4.2%—55.6%。5种典型森林生态系统多年平均林冠截留量((154.2±81.6)—(392.2±203.5)mm)占同期年平均降雨量的(18.7±7.4)%—(25.9±8.3)%。进一步分析表明,我国森林生态系统穿透雨量、树干茎流量和林冠层截留量随观测区年降雨量的增加而呈显著增大(P<0.05),年穿透雨率、年树干茎流率随年降雨量的增加呈显著线性上升趋势(P<0.05),而年林冠截留率与年降雨量呈显著的负相关关系(P<0.01),降雨量、叶面积指数是深刻影响森林生态系统林冠层降雨截留率等特征的重要因素。整体上,不同类型森林生态系统林冠截留降雨能力存在明显差异,林冠层截留率突出表现为:落叶林大于常绿林、针叶林大于阔叶林。

关键词：森林类型冠层截留穿透雨水源涵养服务功能