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无机填料对硅橡胶基耐热复合涂层的影响

北京工业大学学报 2025年第1期51卷 13-21页

作者：杨晓军文卿符寒光贺定勇北京工业大学材料科学与工程学院焊接与表面工程技术研究所北京100124

以硅橡胶为基体,添加无机填料制备的耐热涂层在耐热防腐方面有重要应用前景。采用自制改性硅橡胶作基体,添加不同配比的高岭土、二氧化硅和氧化铝,制备了复合涂层。采用扫描电子显微镜(scanning electron microscopy,SEM)观察了硅橡胶... 详细信息

以硅橡胶为基体,添加无机填料制备的耐热涂层在耐热防腐方面有重要应用前景。采用自制改性硅橡胶作基体,添加不同配比的高岭土、二氧化硅和氧化铝,制备了复合涂层。采用扫描电子显微镜(scanning electron microscopy,SEM)观察了硅橡胶基体中无机填料的分散状况,采用热重分析仪(thermogravimetric analyzer,TGA)对复合涂层的热解温度和失重率进行了分析。结果表明:在复合体系中,无机填料与基体的相容性较好,分散均匀;与基体材料相比,无机填料的添加可有效提高复合材料的耐热性。填料质量分数为20%的复合涂层,其在800℃时质量残留率比自制改性硅橡胶的基体提高了10%以上。

关键词：硅橡胶高岭土耐热性微观形貌涂层复合材料

Driving Torque Reduction in Linkage Mechanisms Using Joint Compliance for Robot Head

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Chinese Journal of Mechanical Engineering 2015年第5期28卷 888-895页

作者： ZHONG Chunhao yang xiaojun Shenzhen Graduate School Harbin Institute of Technology

The conventional linkage mechanisms with compliant joint have been widely studied and implemented for increasing the adaptability of the mechanism to external contacts. However, the analysis of how compliant joints in linkage mechanism can reduce the energy consumption isn＇t still studied deeply. In a mobile service robot head, the actions of blinking the eyes and moving the eyeballs are realized by the planar linkage mechanism respectively. Therefore, minimizing the driving torques through motion trajectories for the linkage mechanism, which will be beneficial to extend the working time for mobile service robots. The dynamic modeling of the linkage mechanism with springs-loaded compliant joint is established. An optimization procedure for obtaining the optimal parameters of springs is proposed for minimizing the max value of driving torques within a range of desired operating conditions. The Simulations prove that the linkage mechanism with compliant joints can effectively reduce the driving torques, and reduce the energy consumption consequently. The framework can also be applied in other similar applications to reduce the driving torque and save energy. Compared with previous efforts, this is the first attempt that the linkage mechanism with complaint joint is applied in the robot head for reducing the driving torque.

关键词： robot head compliant joint linkage mechanism driving torque reduction save energy

数字素养对农村居民工资性收入的影响研究——来自CFPS微观数据的经验证据

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人口与社会 2025年第1期41卷 35-51页

作者：杨小军米丽艳南京邮电大学经济学院

在数字经济背景下,探究数字素养如何影响农村居民工资性收入对于拓宽农村居民增收致富渠道并巩固拓展脱贫攻坚成果具有重要意义。基于中国家庭追踪调查微观数据,实证检验了数字素养对农村居民工资性收入的影响及其作用机制。研究发现,... 详细信息

在数字经济背景下,探究数字素养如何影响农村居民工资性收入对于拓宽农村居民增收致富渠道并巩固拓展脱贫攻坚成果具有重要意义。基于中国家庭追踪调查微观数据,实证检验了数字素养对农村居民工资性收入的影响及其作用机制。研究发现,数字素养的提高能显著增加农村居民的工资性收入,尤其对低收入农村居民的影响更大,且该结果在经过内生性处理和多种稳健性检验后依然成立。异质性分析表明,数字素养对高学历、东部和中部地区、低资产负债率和从事正规工作的农村居民工资性收入的提升效应更加明显。机制检验结果显示,数字素养通过提高信息获取能力、非农就业水平和促进社会资本积累提高农村居民工资性收入。政府可通过提高农村居民数字素养提高其工资性收入,推动共同富裕的实现。

关键词：数字素养农村居民工资性收入非农就业社会资本乡村振兴

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环氧基Sn-Bi焊膏的焊点热稳定性

北京工业大学学报 2025年第2期51卷 140-147页

作者：杨晓军李晓光贺定勇马立民北京工业大学材料科学与工程学院焊接与表面工程技术研究所北京100124

为探究环氧树脂壳层对Sn-Bi焊点的热稳定性的影响,选取了130~170℃的温度区间,对自制环氧基Sn-Bi焊膏和商用Sn-Bi焊膏(不含可固化树脂)形成的焊点分别进行了热循环试验。结果表明,1 000次热循环后,环氧基Sn-Bi焊膏形成的焊点,其表面的... 详细信息

为探究环氧树脂壳层对Sn-Bi焊点的热稳定性的影响,选取了130~170℃的温度区间,对自制环氧基Sn-Bi焊膏和商用Sn-Bi焊膏(不含可固化树脂)形成的焊点分别进行了热循环试验。结果表明,1 000次热循环后,环氧基Sn-Bi焊膏形成的焊点,其表面的环氧树脂壳层依然完整保留,而焊点与铜基板的界面金属间化合物的厚度也明显低于商用Sn-Bi焊膏。1 000次热循环后,环氧基Sn-Bi焊膏形成的焊点的电导率由1.90×10^(6) S/m降为7.96×10^(5) S/m,剪切强度由145.7 MPa降为123.7 MPa;商用Sn-Bi焊膏形成的焊点的电导率由1.94×10^(6) S/m降为4.95×10^(5) S/m,剪切强度由116.1 MPa降为97.3 MPa。因此,对比商用Sn-Bi焊膏,环氧基Sn-Bi焊膏形成的焊点表面的环氧树脂壳层对于提高焊点的剪切强度和热稳定性是有利的,且一定程度上抑制了金属间化合物的生长。

关键词：无铅焊膏环氧树脂热稳定性金属间化合物电导率剪切强度

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Maneuvering Target Tracking in Dense Clutter Based on Particle Filtering

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Chinese Journal of Aeronautics 2011年第2期24卷 171-180页

作者： yang xiaojun XING Keyi FENG Xingle School of Information Engineering Chang'an University Xi'an 710064 China The National Key Laboratory for Manufacturing System Engineering Xi 'an Jiaotong University Xi'an 710049 China

An improved particle filtering（IPF） is presented to perform maneuvering target tracking in dense *** proposed filter uses several efficient variance reduction methods to combat particle degeneracy,low mode prior probabilities and measure-ment-origin *** the framework of a hybrid state estimation,each particle samples a discrete mode from its poste-rior distribution and the continuous state variables are approximated by a multivariate Gaussian mixture that is updated by an unscented Kalman filtering（UKF）.The uncertainty of measurement origin is solved by Monte Carlo probabilistic data associa-tion method where the distribution of interest is approximated by particle filtering and *** data association and precise behavior mode detection are successfully achieved by the proposed method in the environment with heavy clutter and very low mode prior *** performance of the proposed filter is examined and compared by Monte Carlo simulation over typical target scenario for various clutter *** simulation results show the effectiveness of the proposed filter.

关键词： particle filtering Monte Carlo methods Kalman filter probability data association target tracking nonlinear filtering

新版《德国牙医执业许可法》的实施对我国口腔教学改革的启示

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中国继续医学教育 2025年第2期17卷 33-38页

作者：李心竹杨博杨小军侯晋南方医科大学南方医院口腔科广东广州510515

新颁布的《德国牙医执业许可法》(zahn?rztliche approbationsordnung,ZApprO)于2021、2022冬季学期正式实施,标志着对使用了65年的旧法规全面改革的落地。改革后的德国牙医教育体系明确强调了预防和科学导向的重要性,加强了跨学科的联... 详细信息

新颁布的《德国牙医执业许可法》(zahn?rztliche approbationsordnung,ZApprO)于2021、2022冬季学期正式实施,标志着对使用了65年的旧法规全面改革的落地。改革后的德国牙医教育体系明确强调了预防和科学导向的重要性,加强了跨学科的联系和个体间的沟通能力;不仅如此,要着重培养学生的全面视角,让口腔医学生更早接触临床,并对医学生的人文素养与科研能力提出更高的要求。文章简要概述了《德国牙医执业许可法》改革的历史脉络、既定目标及其核心内容以外,还对两国的教育体系进行对比,在口腔本科及住院医师规范化培训教育领域,我国应借鉴国外先进的培养方法,并结合我国特色,培育出能够适应新时代要求的口腔医学新型人才。

关键词：口腔医学本科教育临床前训练德国牙医执业许可法教学改革人文素质教育医患沟通

Review on the adhesive tendrils of Parthenocissus

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Chinese Science Bulletin 2014年第2期59卷 113-124页

作者： xiaojun yang Wenli Deng College of Materials Science and Engineering South China University of Technology

320 years ago,the adhesive tendrils of Parthenocissus were ***,the permanent attachment system of the tendrils is retrieved *** microscopy,scanning electron microscopy and transmission electron microscopy observations provide sufficient information on the characteristic attachment ***,cytochemical and immunocytochemical methods unravel the sorts and the molecular compositions of the secreted adhesive *** review provides a general overview of the whole research history and the latest progress in this *** authors elaborate the adhesive tendrils of Parthenocissus from macroscopic morphology,through microscopic structure,secreted adhesive fluid,adhesive force and adhesion mechanism to bionic exploration and application.

关键词：爬山虎胶粘剂卷须电子显微镜观察扫描电子显微镜粘性液体微观结构光学显微镜

Review on ultra-lightweight flapping-wing nano air vehicles:Artificial muscles,flight control mechanism,and biomimetic wings

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Chinese Journal of Aeronautics 2023年第6期36卷 63-91页

作者： Liang WANG Bifeng SONG Zhongchao SUN xiaojun yang School of Aeronautics Northwestern Polytechnical UniversityXi'an 710072China Research&Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518057China yangtze River Delta Research Institute Northwestern Polytechnical UniversityTaicang 215400China

Flying insects are capable of flapping their wings to provide the required power and control forces for flight.A coordinated organizational system including muscles,wings,and control architecture plays a significant role,which provides the sources of inspiration for designing flapping-wing *** recent years,due to the development of micro-and meso-scale manufacturing technologies,advances in components technologies have directly led to a progress of smaller Flapping-Wing Nano Air Vehicles(FWNAVs)around gram and sub-gram scales,and these air vehicles have gradually acquired insect-like locomotive strategies and *** paper will present a selective review of components technologies for ultra-lightweight flapping-wing nano air vehicles under 3 g,which covers the novel propulsion methods such as artificial muscles,flight control mechanisms,and the design paradigms of the insect-inspired wings,with a special focus on the development of the driving technologies based on artificial muscles and the progress of the biomimetic *** challenges involved in constructing such small flapping-wing air vehicles and recommendations for several possible future directions in terms of component technology enhancements and overall vehicle performance are also discussed in this *** review will provide the essential guidelines and the insights for designing a flapping-wing nano air vehicle with higher performance.

关键词： Actuators Artificial muscle Biomimetic wings Flapping wing Flight control mechanism Nano Air Vehicles(NAVs)

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浙东唐诗之路视域下传统村落诗意营造研究

工业设计 2025年第2期 130-133页

作者：许雨菲杨小军浙江理工大学艺术与设计学院杭州310000

浙东唐诗之路是一条山水荟萃之路、历史文化之路、融合发展之路,其沿线分布着大量风景秀丽且历史悠久的传统村落,但面临着环境破坏、文化传承、产业转型等一系列问题。文章系统梳理了浙东唐诗之路的自然资源、文化资源与旅游资源,充分... 详细信息

浙东唐诗之路是一条山水荟萃之路、历史文化之路、融合发展之路,其沿线分布着大量风景秀丽且历史悠久的传统村落,但面临着环境破坏、文化传承、产业转型等一系列问题。文章系统梳理了浙东唐诗之路的自然资源、文化资源与旅游资源,充分挖掘区域的历史文化和特色,通过皈依诗境生态、唤醒诗意生活、融合诗画生产三种诗意营造方法打造诗意村落,并通过诗路文化资源的开发与利用,将其转化为环境和美之路、人文和润之路、产业和融之路。以期为沿线其他传统村落的提升改造和建设提供借鉴和指导。

关键词：浙东唐诗之路传统村落诗意营造