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永磁交变磁场平面磁粒研磨试验研究

表面技术 2024年第16期53卷 159-168页

作者：王荟江闫宇航丁云龙韩冰马小刚陈燕辽宁科技大学机械工程与自动化学院辽宁鞍山114051

目的探究永磁交变磁场下平面磁粒研磨质量的影响因素,增强加工区域的磁场变化,使磁性磨粒的加工轨迹多样化,提高研磨效率和研磨效果。方法设计永磁交变磁场取代传统平面磁粒研磨中的恒定磁场源,并采用磁场模拟软件对永磁交变磁场进行仿... 详细信息

目的探究永磁交变磁场下平面磁粒研磨质量的影响因素,增强加工区域的磁场变化,使磁性磨粒的加工轨迹多样化,提高研磨效率和研磨效果。方法设计永磁交变磁场取代传统平面磁粒研磨中的恒定磁场源,并采用磁场模拟软件对永磁交变磁场进行仿真,对不同状态下磁场的分布进行分析,参考仿真结果选取实验参数;使用产生径向磁场的环形磁铁作为磁场发生源,导磁性良好的纯铁作为导磁骨架,通过磁路的开放和闭合实现磁场的交变;使用步进电机及脉冲发生器调节研磨磁场,进而调节磁极交变频率;通过试验对比不同参数下对SUS304不锈钢的研磨效果,在研磨间隙为1.5mm的条件下,对比不同研磨时间、不同磨粒目数、不同主轴转速对工件表面质量的影响,使用触针式表面粗糙度测量仪和超景深3D电子显微镜检测对比试验前后试件的表面质量并对仿真结果进行验证。结果对比永磁交变磁场不同磁场分布状态仿真图,发现永磁交变磁场研磨区域场强变化显著,场强峰值时磁感应强度较高;磁性磨粒随离心力与永磁交变磁极状态的变化做周期性运动,使研磨轨迹复杂化。在研磨时间为40min、主轴转速为245 r/min、磨粒粒径为60目条件下,SUS304不锈钢板经研磨后,表面粗糙度由原始的0.312μm降至0.060μm。结论永磁交变磁场在提高加工区域磁感应强度的同时,使磁场发生周期性变化进而使磁性磨粒在加工区域做周期性运动,复杂化研磨轨迹促进了磨粒的更新,相比于恒定磁场磁粒研磨工艺,永磁交变磁场提高了研磨效率与研磨效果。

关键词：磁粒研磨磁性磨粒表面粗糙度磁感应强度永磁交变磁场 SUS304

高铁线路互联互通场景下大号码道岔应答器设置方案研究

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铁道通信信号 2024年第5期60卷 98-103页

作者：闫宇航中国铁路设计集团有限公司天津300308

济青高铁与胶济客专在胶州北站互联互通,为满足不同线路间运输组织的需要,胶州北站设有多组42号大号码道岔,形成了连续大号码道岔的特殊场景。结合工程实际,针对该特殊场景进行分析,提出相应的应答器设置方案。方案一考虑在各大号码道... 详细信息

济青高铁与胶济客专在胶州北站互联互通,为满足不同线路间运输组织的需要,胶州北站设有多组42号大号码道岔,形成了连续大号码道岔的特殊场景。结合工程实际,针对该特殊场景进行分析,提出相应的应答器设置方案。方案一考虑在各大号码道岔防护信号机外方分别设置应答器;方案二、方案四考虑仅对应一组大号码道岔设置应答器;方案三考虑在第1组大号码道岔防护信号机外方再设置2组大号码道岔应答器。通过分析各方案动车组运行状态,从运输组织效率及行车安全方面进行比选,优选出场间采用虚拟信号机结合设置大号码道岔应答器的方案。经在现场实际应用,该优选方案保障了行车安全,提高了运输效率,节约了工程投资。同时,对类似胶州北站连续大号码道岔布置的特殊场景进行思考,提出合理建议以供后续工程设计参考。

关键词：高速铁路互联互通大号码道岔应答器虚拟信号机优化方案

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算法与认知:AI驱动的人力资源管理创新

科技创业月刊 2024年第8期37卷 22-27页

作者：付春香闫宇航甘肃政法大学商学院甘肃兰州730070

信息化时代的深入发展使AI实践成为企业人力资源管理必须面对的课题。整体看,各行各业在人力资源管理领域对AI的应用尚未达成清晰的认知和普及。基于认知行为理论、创新扩散理论,从组织、社会层面建构了基于AI驱动的人力资源管理创新模... 详细信息

信息化时代的深入发展使AI实践成为企业人力资源管理必须面对的课题。整体看,各行各业在人力资源管理领域对AI的应用尚未达成清晰的认知和普及。基于认知行为理论、创新扩散理论,从组织、社会层面建构了基于AI驱动的人力资源管理创新模型,揭示AI与人力资源管理领域的发展过程,确定AI的应用逻辑及在人力资源管理职能模块的实践。

关键词：人工智能人力资源管理认知行为理论创新扩散理论

Research progresses and prospects of medicated oil dual-purpose crop safflower based on patent mining

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Oil Crop Science 2022年第4期7卷 209-218页

作者： Lanyu Zhou yuhang yan Yue Wang Qinghua Wu Jie yan Jin Pei State Key Laboratory of Characteristic Chinese Medicine Resources in Southwest China Chengdu611137China School of Pharmacy Chengdu University of Traditional Chinese MedicineChengdu611137China

Safflower is widely cultivated and used as a dual-purpose medicinal oil *** research used the incoPat patent database to search the global safflower patents for nearly 20 years,aiming to reveal the development process and current situation of the safflower industry in China and around the world by analyzing patent application trends,patent technology characteristics,advantageous industries and regions,patent quality,*** analysis shows that safflower patent applications are generally increasing,and the period 2010-2016 is characterized by the rapid development of patent *** technical features of global patents are mainly concentrated in pharmaceutical preparations,cosmetics,food and health care,various beverages,animal feed,safflower cultivation and harvesting equipment,and safflower seed *** the rapid development of patent applications,safflower was further developed in cosmetics,edible oil,and harvesting *** addition,patent applications in rheumatism and bone diseases have increased,with the potential for *** is the leading region for researching and developing medicinal safflower patents,especially Shandong and Henan *** patents are more focused on the value development of safflower seed oil in food and *** to the major countries and organizations that apply for safflower patents on a global scale,the quality of Chinese safflower patents is medium,and more awareness of patent protection is *** paper provides suggestions for the subsequent development of the safflower industry,summarizes and analyzes the development trend of safflower patents,and provides new ideas to obtain innovative patent results.

关键词： Safflower Patent Medicated oil dual-purpose crop Industry incoPat

电针预处理对AMI小鼠心肌局部炎症及DNA-PK/Rictor/Myc信号通路的影响

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南京中医药大学学报 2024年第6期40卷 589-597页

作者：江敏娇彭柔闫煜杭刘肖儿钱丹颖鲁晓涵陈栎遥于美玲卢圣锋南京中医药大学针药结合教育部重点实验室江苏南京210023 南京中医药大学附属张家港医院江苏苏州215600 南京中医药大学养老服务与管理学院江苏南京210023

目的观察内关穴电针预处理后急性心肌梗死小鼠(AMI)心功能、局部炎症水平及巨噬细胞M2型极化变化,并从调控DNA-PK/Rictor/Myc信号通路角度探讨其可能机制。方法将雄性C57BL/6J小鼠随机分为假手术组、模型组和电针组,每组10只。采用结扎... 详细信息

目的观察内关穴电针预处理后急性心肌梗死小鼠(AMI)心功能、局部炎症水平及巨噬细胞M2型极化变化,并从调控DNA-PK/Rictor/Myc信号通路角度探讨其可能机制。方法将雄性C57BL/6J小鼠随机分为假手术组、模型组和电针组,每组10只。采用结扎冠状动脉左前降支制备心肌缺血模型。电针组接受双侧内关穴电针干预,疏密波,2/15 Hz,1 mA,每次20 min,每日1次,连续3 d,电针干预结束后30 min造模。采用超声心动图检测心脏射血分数(EF)和短轴收缩率(FS);HE、TUNEL染色观察小鼠心肌病理形态和心肌细胞凋亡;免疫组化和ELISA法检测梗死区心肌组织和外周血中IL-1β、TNF-α、NLRP3的表达水平;流式细胞术检测心脏中巨噬细胞极化状态,Western blot法检测梗死心肌中DNA-PK、p-DNA-PK、Rictor、Myc的蛋白表达水平。结果与假手术组相比,模型组的EF、FS明显降低(P<0.0001),炎性细胞浸润明显,心肌细胞凋亡指数显著升高(P<0.001),心肌组织和血清中IL-1β、NLRP3、TNF-α表达上调(P<0.01,P<0.001),巨噬细胞百分比明显增加(P<0.001),M2型巨噬细胞百分比下降(P<0.0001),心肌组织中p-DNA-PK、Rictor和Myc蛋白表达水平明显降低(P<0.05,P<0.0001);与模型组相比,电针组的EF、FS显著升高(P<0.0001),炎性细胞浸润减少,心肌细胞凋亡指数下降(P<0.01),心肌组织和血清中IL-1β、NLRP3、TNF-α表达下调(P<0.05,P<0.01,P<0.001),巨噬细胞百分比下降(P<0.05),M2型巨噬细胞百分比上升(P<0.01),心肌组织中p-DNA-PK、Rictor和Myc蛋白表达显著升高(P<0.05,P<0.01,P<0.0001)。结论电针预处理可能通过调控DNA-PK/Rictor/Myc信号通路,促进巨噬细胞M2极化,减轻局部炎症,减少心肌细胞凋亡,从而提高心功能,实现心肌保护效应。

关键词：心肌梗死电针预处理巨噬细胞极化 DNA-PK Rictor

Wireless Power Supply Based on MNG-MNZ Metamaterial for Cardiac Pacemakers

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CES Transactions on Electrical Machines and Systems 2024年第1期8卷 103-112页

作者： Weihua Chen Jingtao Jia Xiaoheng yan yuhang Song Jiayi Li Faculty of Electrical and Control Engineering Liaoning Technical UniversityNo.188Longwan South StreetXingchengHuludao 125105China CES

To solve the low power transfer efficiency and magnetic field leakage problems of cardiac pacemaker wireless powering, we proposed a wireless power supply system suitable for implanted cardiac pacemaker based on mu-negative(MNG) and mu-nearzero(MNZ) metamaterials. First, a hybrid metamaterial consisted of central MNG unit for magnetic field concentration and surrounding MNZ units for magnetic leakage shielding was established by theoretical calculation. Afterwards, the magnetic field distribution of wireless power supply system with MNG-MNZ metamaterial slab was acquired via finite element simulation and verified to be better than the distribution with conventional MNG slab deployed. Finally, an experimental platform of wireless power supply system was established with which power transfer experiment and system temperature rise experiment were *** and experimental results showed that the power transfer efficiency was improved from 44.44%,19.42%, 8.63% and 6.19% to 55.77%, 62.39%, 20.81%and 14.52% at 9.6 mm, 20 mm, 30 mm and 50 mm,respectively. The maximum SAR acquired by SAR simulation under human body environment was-7.14 dbm and maximum reduction of the magnetic field strength around the receiving coil was 2.82 A/m. The maximum temperature rise during 30min charging test was 3.85℃,and the safety requirements of human bodies were met.

关键词： Cardiac pacemaker MNG metamaterial MNZ metamaterial Wireless power supply system

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误收码场景电码化电路优化设计

铁路通信信号工程技术 2024年第8期21卷 109页

作者：闫宇航中国铁路设计集团有限公司天津300308

哈佳铁路孙家站存在多个发车口,站型复杂,现场试验过程中发现办理部分接车进路后,列车运行过程中存在误接收HU码的情况。结合机车信号传输原理,对产生列车误收码问题的原因进行分析和研究,针对各原因提出解决方案,并着重从电码化电路设... 详细信息

哈佳铁路孙家站存在多个发车口,站型复杂,现场试验过程中发现办理部分接车进路后,列车运行过程中存在误接收HU码的情况。结合机车信号传输原理,对产生列车误收码问题的原因进行分析和研究,针对各原因提出解决方案,并着重从电码化电路设计优化的角度提出接发车进路采用不同基本载频、增设切码继电器等优化设计方案,现场采用优化方案后,避免了误收码问题对实际运营的影响;结合优化设计方案,对同类工程提出避免产生误收码的设计建议,为后续工程提供设计思路。

关键词：误收码机车信号电码化优化设计

Research on the identification of the production origin of Angelica dahurica using LIBS technology combined with machine learning algorithms

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Optoelectronics Letters 2024年第3期20卷 171-176页

作者： SUN Jiaxing LI Honglian YAO yuhang yan Qiongyan DONG Fang College of Quality and Technology Supervising Hebei UniversityBaoding 071000China National and Local Joint Engineering Center of Measuring Instruments and Metrology Systems Baoding 071000China Key Laboratory of Energy Measurement and Safety Detection Technology in Hebei Province Baoding 071000China

The origin of Angelica dahurica medicinal herbs varies, and their pharmacological effects also differ. In order to achieve rapid and accurate identification of the origin of Angelica dahurica medicinal herbs, this study utilizes laser induced breakdown spectroscopy(LIBS) technology combined with machine learning algorithms to identify the original source of Angelica dahurica. Sliced samples of Angelica dahurica were taken from four regions: Hebei, Henan, Zhejiang, and Sichuan. The spectral data from the sliced samples were used as features, and different algorithms including support vector machine(SVM), back propagation(BP) neural network, genetic algorithm-back propagation(GA-BP) neural network, particle swarm optimization-back propagation(PSO-BP) neural network, convolutional neural network(CNN), and CNN-SVM were employed to classify the origin of Angelica dahurica samples.

关键词： neural origin network

Impacts of Integrated Multi-Trophic Aquaculture on Phytoplankton in Sanggou Bay

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Journal of Ocean University of China 2024年第3期23卷 835-843页

作者： HAN Jichang LIU Xing PAN Kehou LIU Jiaojiao SUN yan JIN Guiyong LI Yun LI yuhang College of Food Science and Engineering Ningbo UniversityNingbo 315832China Key Laboratory of Mariculture(Ocean University of China) Ministry of EducationQingdao 266003China Function Laboratory for Marine Fisheries Science and Food Production Processes Qingdao National Laboratory for Marine Science and TechnologyQingdao 266100China Laboratory of Marine Organism Taxonomy and Phylogeny Institute of OceanologyChinese Academy of SciencesQingdao 266071China

Integrated multi-trophic aquaculture(IMTA)has been considered as an ecofriendly culture system providing a potential solution to environmental risks caused by intensive monoculture ***,the impact of IMTA on phytoplankton remains *** this study,the spatial and temporal variations of phytoplankton in Sanggou Bay were investigated seasonally based on 21 sampling sites covering three cultivation zones(bivalve zone,IMTA zone,and kelp zone)and one control zone(without aquatic cultivation).In total,128 phytoplankton species,with diatoms and dinoflagellates as the dominant groups,were obtained across the whole year,and the mean Shannon diversity index(H')and species richness(SR)were determined as 1.39 and 9.39,*** maximum chlorophyll a(Chl-a)(6.32μg L^(-1))and plankton diversity(H'of 1.97)occurred in summer and autumn,*** to other zones,the bivalve zone displayed significantly higher Chl-a and lower H'in majority of *** PERMANOVA analysis indicated that the phytoplankton assemblage in the bivalve zone was significantly different with the control and kelp zones,while the IMTA zone maintained close to other three *** on generalized additive models,temperature,NO_(2)^(-)-N,N/P ratio,SiO_(3)^(2-)-Si,and salinity were determined as the key factors underlying Chl-a and phytoplankton ***-tionally,the results of redundancy analysis further indicated that the phytoplankton assemblage in the bivalve zone is positively re-lated with nutrients such as NO_(3)^(-)-N and NH_(4)^(+)-N as well as water depth,while the phytoplankton assemblages in the kelp,control,and IMTA zones are associated with NO_(2)^(-)-N,SiO_(3)^(2-)-Si,and *** all observations into consideration together,it can be inferred that IMTA can effectively reduce Chl-a level compared to bivalve monoculture by reducing the ***,the SR,H’,and species composition of phytoplankton are primarily determined by local environment fa

关键词： phytoplankton diversity Sanggou Bay integrated multi-trophic aquaculture