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基于RK3358的电力系统智能化设计

通信电源技术 2024年第5期41卷 28-31页

作者：王坤阳佳源科技股份有限公司江苏南京210012

国内的电力系统正面临着电网布局高度复杂、极高的行业标准、严格的用户需求以及数字化升级等机遇和挑战,通过RK3358核心板,将数字技术加持到电力系统智能化领域,有助于电力系统提升整体的感知能力、管理水平以及运行效率,不断加强电力... 详细信息

国内的电力系统正面临着电网布局高度复杂、极高的行业标准、严格的用户需求以及数字化升级等机遇和挑战,通过RK3358核心板,将数字技术加持到电力系统智能化领域,有助于电力系统提升整体的感知能力、管理水平以及运行效率,不断加强电力强国的智能化建设。随着智能化电力系统的愈加完善,农业生产也会从中受益良多,不仅可以节约成本,提高农业生产效率,还能提供安全、稳定、便捷的电力服务。电力系统智能化为农业生产提供质优价廉的电力服务,能够支持越来越多的新型农业生产设备投入农业生产领域,对于农作物产量的提高、品质的优化、农业生产资源的整合、农业产业的优化布局等都会产生非常积极的作用。

关键词： RK3358核心板电力系统智能化农业生产效率

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基于YOLOv4的烟叶烟梗识别算法研究

农业技术与装备 2024年第4期 20-22页

作者：张江涛王堃阳华北水利水电大学河南郑州450045

针对烟叶分级系统中烟叶上料、下料中的烟梗识别定位问题,提出了一种新型烟梗检测算法:基于YOLOv4卷积神经网络,将其主干网络修改替换为Efficientdet,降低网络模型的体积并提高模型对烟梗类型的识别准确率,在此基础上引入深度可分离卷积... 详细信息

针对烟叶分级系统中烟叶上料、下料中的烟梗识别定位问题,提出了一种新型烟梗检测算法:基于YOLOv4卷积神经网络,将其主干网络修改替换为Efficientdet,降低网络模型的体积并提高模型对烟梗类型的识别准确率,在此基础上引入深度可分离卷积,并在深度可分离卷积中引入宽度因子alpha变量,优化了系统参数,简化了网络结构。结果表明,此算法在单姿态烟梗识别中其mAP值均优于SSD、Centernet、Faster-rcnn、YOLOv4little以及YOLOv4这几种目标检测算法,在多姿态烟梗识别中其mAP值和YOLOv4算法相差仅为2%,可减少网络参数,提高模型检测准确率与系统识别速度。

关键词：烟梗识别定位 YOLOv4 EfficientNet 深度可分离卷积

新《证券法》实施对我国上市公司盈余管理行为的影响研究

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无锡商业职业技术学院学报 2024年第4期24卷 28-35页

作者：赵薇陈振凤王坤阳济南大学商学院

新《证券法》实施是否会对抑制企业盈余管理行为产生积极作用，从而提高企业的会计信息披露质量，是值得深究的问题。基于2015—2022年沪深A股上市公司相关研究数据，分析新《证券法》的实施对企业应计和真实盈余管理行为的影响以及内... 详细信息

新《证券法》实施是否会对抑制企业盈余管理行为产生积极作用，从而提高企业的会计信息披露质量，是值得深究的问题。基于2015—2022年沪深A股上市公司相关研究数据，分析新《证券法》的实施对企业应计和真实盈余管理行为的影响以及内部控制质量在其中的调节作用。结果表明：新《证券法》的实施对上市公司的应计盈余管理行为和真实盈余管理行为均有显著的抑制效应，且其在内部控制质量较高的企业中影响更为明显。据此，建议上市公司完善企业内部控制体系，加强员工职业道德培养；监管机构加大监管力度，进一步完善配套法律法规。

关键词：新《证券法》应计盈余管理真实盈余管理内部控制

RECENT PROGRESS ON SPHERICAL HARMONIC APPROXIMATION MADE BY BNU RESEARCH GROUP -In memory of Professor Sun Yongsheng

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Analysis in Theory and Applications 2007年第1期23卷 50-63页

作者： kunyang wang Feng Dai School of Mathematical Sciences Beijing Normal University Beijing 100875 P. R. China Department of Mathematical and Statistical Sciences CAB 632 University of Alberta Edmonton Alberta Canada T6 2G1

As early as in 1990, Professor Sun Yongsheng, suggested his students at Beijing Normal University to consider research problems on the unit sphere. Under his guidance and encouragement his students started the research on spherical harmonic analysis and approximation. In this paper, we incompletely introduce the main achievements in this area obtained by our group and relative researchers during recent 5 years （2001-2005）. The main topics are： convergence of Cesaro summability, a.e. and strong summability of Fourier-Laplace series; smoothness and K-functionals; Kolmogorov and linear widths.

关键词： spherical harmonics Fourier-Laplace expansion convergence approximation smoothness K-functional width

Development of a 3D Printed Bipedal Robot:Towards Humanoid Research Platform to Study Human Musculoskeletal Biomechanics

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Journal of Bionic Engineering 2021年第1期18卷 150-170页

作者： kunyang wang Lei Ren Zhihui Qian Jing Liu Tao Geng Luquan Ren Key Laboratory of Bionic Engineering Ministry of EducationJilin UniversityChangchtm 130022China School of Mechanical Aerospace and Civil EngineeringUniversity of ManchesterManchesterM139PLUnited Kingdom Department of Design Engineering Middlesex UniversityLondonNW44BTUnited Kingdom

The objective of this study is to develop a bio robot with a high degree of biomechanical fidelity to the human musculoskeletal system in order to investigate the biomechanical principles underlying human *** robot was designed to possess identical biomechanical characteristics to the human body in terms of body segment properties,joint configurations and 3D musculoskeletal *** design parameters were acquired based on the medical images,3D musculoskeletal model and gait measurements of a healthy human *** satistyall the design criteria sinultaneously,metal 3D printing was used to construct the whole-body humanoid *** artificial muscles were fabricated in accordance with the predefined 3D musculoskeletal geometries.A series of physical tests were con-ducted to demonstrate the capacity of the robot *** fabricated robot shows equivalent mechanical characteristics to the human body as originally *** results of the physical tests by systematically changing environmental conditions and body structures have successfully demonstrated the capability of the robot platform to investigate the structure-function interplay in the human musculoskeletal system and also its interaction with the environment during *** robot might provide a valuable and powerful physical platfornm towards studying hunan musculoskeletal biomechanics by generating new hypotheses and revealing new insights into human locomotion science.

关键词： musculoskeletal biomechanics humanoid robots biomchanical fidelity 3D printing human walking

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基于SESAM的掺铥锁模光纤激光器研究

中国计量大学学报 2024年第1期35卷 137-141,176页

作者：张子奕王坤阳李环环中国计量大学光学与电子科学学院浙江杭州310018

目的:研究基于半导体可饱和吸收镜的大能量被动锁模掺铥光纤激光器的输出特性。方法:利用半导体可饱和吸收镜作为锁模器件,分别采用光纤全反射镜和光纤光栅搭建全光纤结构的被动锁模掺铥光纤激光器。结果:在采用光纤全反镜结构中,在泵... 详细信息

目的:研究基于半导体可饱和吸收镜的大能量被动锁模掺铥光纤激光器的输出特性。方法:利用半导体可饱和吸收镜作为锁模器件,分别采用光纤全反射镜和光纤光栅搭建全光纤结构的被动锁模掺铥光纤激光器。结果:在采用光纤全反镜结构中,在泵浦功率为900 mW时,获得了中心波长为1945 nm,重复频率为9.80 MHz,单脉冲能量为9.46 nJ的锁模脉冲输出。用光纤光栅替换光纤全反射镜,大大降低了锁模阈值。在泵浦光为210 mW时,获得了中心波长为1941.5 nm的稳定锁模脉冲输出,功率稳定性RMS小于1%。结论:本文所搭建的锁模光纤激光器单脉冲能量可以达到nJ量级且锁模稳定。

关键词：超短脉冲光纤激光器被动锁模半导体可饱和吸收镜

Intrinsic Kinematics of the Tibiotalar and Subtalar Joints during Human Walking based on Dynamic Biplanar Fluoroscopy

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Journal of Bionic Engineering 2023年第5期20卷 2059-2068页

作者： Shengli wang Zhihui Qian Xiangyu Liu Guangsheng Song kunyang wang Jianan Wu Jing Liu Lei Ren Luquan Ren Key Laboratory of Bionic Engineering Jilin UniversityChangchun130022China School of Mechanical Aerospace and Civil EngineeringUniversity of ManchesterManchesterM139PLUK

Accurate knowledge of the kinematics of the in vivo Ankle Joint Complex(AJC)is critical for understanding the biomechanical function of the foot and assessing postoperative rehabilitation of ankle disorders,as well as an essential guide to the design of ankle–foot assistant ***,detailed analysis of the continuous 3D motion of the tibiotalar and subtalar joints during normal walking throughout the stance phase is still considered to be *** this study,dynamic radiographs of the hindfoot were acquired from eight subjects during normal *** motions with six Degrees of Freedom(DOF)and the coupled patterns of the two joints were *** was found that the movements of the two joints were mostly in opposite directions(including rotation and translation),mainly in the early and late *** were significant differences in the Range of Motion(ROM)in Dorsiflexion/Plantarflexion(D/P),Inversion/Eversion(In/Ev),and Anterior–Posterior(AP)and Medial–Lateral(ML)translation of the tibiotalar and subtalar joints(p<0.05).Plantarflexion of the tibiotalar joint was coupled with eversion and posterior translation of the subtalar joint during the impact phase(R^(2)=0.87 and 0.86,respectively),and plantarflexion of the tibiotalar joint was coupled with inversion and anterior translation of the subtalar joint during the push-off phase(R^(2)=0.93 and 0.75,respectively).This coordinated coupled motion of the two joints may be a manifestation of the AJC to move flexibly while bearing weight and still have stability.

关键词： Dynamic biplane radiography Tibiotalar joint Subtalar joint In vivo kinematics Coupled motion Bionic design

Iron-doped nickel disulfide nanoarray： A highly efficient and stable electrocatalyst for water splitting

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Nano Research 2016年第11期9卷 3346-3354页

作者： Na Yang Chun Tang kunyang wang Gu Du Abdullah M. Asiri Xuping Sun College of Chemistry Sichuan University Chengdu 610064 China Chengdu Institute of Geology and Mineral Resources Chengdu 610081 China Chemistry Department Faculty of Science King Abdulaziz University Jeddah 21589 Saudi Arabia

Developing efficient water-splitting electrocatalysts, particularly for the anodic oxygen evolution reaction （OER）, is an important challenge in energy conversion technologies. In this study, we report the development of iron-doped nickel disulfide nanoarray on Ti mesh （Fe0.1-NiS2 NA/Ti） via the sulfidation of its nickel-iron-layered double hydroxide precursor （NiFe-LDH NAFFi）. As a three-dimensional OER anode, Fe0.1NiS2 NA/Ti exhibits remarkable activity and stability in 1.0 M KOH, with the requirement of a low overpotential of 231 mV to achieve 100 mA·cm^-2. In addition, it exhibits excellent activity and durability in 30 wt.% KOH. Notably, this electrode is also efficient for the cathodic hydrogen evolution reaction under alkaline conditions.

关键词： nickel disulfide (NiS2) iron doping nanosheet array water splitting oxygen evolution reaction

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基于不同宽带非相干光源的甲烷浓度测量研究

中国计量大学学报 2024年第1期35卷 53-57,128页

作者：王禹涵王坤阳徐时清张军杰王世锋郭杰中国计量大学光学与电子科技学院浙江杭州310018 杭州职业技术学院浙江杭州310018 杭州泽天春来科技有限公司浙江杭州310018

目的:研究非相干宽带腔增强吸收光谱(IBBCEAS)技术中所应用的不同类型宽带光源的性能差异对系统输出信号的影响。方法:搭建了直径2.54 cm,长30 cm的气池,通入体积分数为99.99%的甲烷气体,分别采用非相干宽带卤素光源和超连续谱光源入射... 详细信息

目的:研究非相干宽带腔增强吸收光谱(IBBCEAS)技术中所应用的不同类型宽带光源的性能差异对系统输出信号的影响。方法:搭建了直径2.54 cm,长30 cm的气池,通入体积分数为99.99%的甲烷气体,分别采用非相干宽带卤素光源和超连续谱光源入射气池,通过光纤准直器耦合出射光进入近红外多模光纤,光纤接入近红外光谱仪测量吸收光谱。结果:两种光源的光学密度谱线对比显示超连续谱光源的光学噪声远大于卤素光源,其主要原因为超连续谱光源内部温度控制欠稳定导致输出功率在频域上出现较大波动造成的基线偏移。结论:相较于卤素光源,超连续谱光源具有光功率高,空间相干性好等诸多优点,但由于温度控制原因所导致的光功率输出不够稳定,导致该光源在IBBCEAS系统中的应用受到一定限制。

关键词：非相干宽带腔增强吸收光谱技术超连续谱光源甲烷浓度检测矿井安全