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脉冲磁场时效处理对A356铝合金组织和性能的影响

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金属热处理 2024年第4期49卷 138-145页

作者：翟鹏飞潘浩邢淑清宫美娜刘永珍麻永林内蒙古科技大学材料与冶金学院内蒙古包头014010

通过金相显微镜(OM)、场发射扫描电镜(SEM)和万能试验机研究了不同频率下的脉冲磁场时效处理对A356合金微观组织和力学性能的影响。结果表明,与0 Hz时效处理相比,合金经过不同频率的脉冲磁场处理后微观组织得到改善,力学性能明显提升。... 详细信息

通过金相显微镜(OM)、场发射扫描电镜(SEM)和万能试验机研究了不同频率下的脉冲磁场时效处理对A356合金微观组织和力学性能的影响。结果表明,与0 Hz时效处理相比,合金经过不同频率的脉冲磁场处理后微观组织得到改善,力学性能明显提升。当脉冲磁场频率为60 Hz时,合金的抗拉强度和屈服强度分别达到358 MPa和278 MPa,在满足工厂技术要求的前提下,工艺耗时比工厂T6热处理工艺缩短570 min。分析表明,不同频率的脉冲磁场时效处理合金具有不同的吉布斯自由能和扩散速率,改变合金晶粒、共晶Si和Si颗粒的尺寸和形貌,从而对合金的综合性能产生影响。

关键词： A356铝合金磁场频率微观组织力学性能

多褶皱页岩环境下新型隧道防塌方开挖装置及施工技术研究

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科技创新与生产力 2024年第1期45卷 101-104页

作者：翟鹏飞梁庆赵飞鹏中交二公局国际公司陕西西安710065

本文提出了一种多褶皱页岩环境下新型隧道防塌方开挖装置及其相应的施工技术。首先,分析了多褶皱页岩环境下隧道塌方风险的特点和原因;然后,介绍了新型开挖装置的结构、工作原理、施工技术和措施;最后,以塞尔维亚E763高速公路项目为例,... 详细信息

本文提出了一种多褶皱页岩环境下新型隧道防塌方开挖装置及其相应的施工技术。首先,分析了多褶皱页岩环境下隧道塌方风险的特点和原因;然后,介绍了新型开挖装置的结构、工作原理、施工技术和措施;最后,以塞尔维亚E763高速公路项目为例,验证了新型开挖装置及施工技术在实际工程中的应用效果。

关键词：多褶皱页岩开挖装置隧道施工隧道塌方

胶质淋巴系统在中枢神经系统脱髓鞘疾病发生发展中的作用

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中国神经免疫学和神经病学杂志 2024年第3期31卷 216-220页

作者：柴宜可翟飞鹏蔚洪恩山西医科大学第五临床医学院神经内科脑疾病防治山西省重点实验室 030012

中枢神经系统脱髓鞘疾病是一类神经细胞相对保持完整,多种病理因素导致髓鞘损伤脱失的疾病。近年来的研究表明,大脑中存在胶质淋巴系统,该系统可进行脑脊液和组织液的交换,是脑清除代谢产物和有害物质的重要途径,具有冲洗、洁净脑组织... 详细信息

中枢神经系统脱髓鞘疾病是一类神经细胞相对保持完整,多种病理因素导致髓鞘损伤脱失的疾病。近年来的研究表明,大脑中存在胶质淋巴系统,该系统可进行脑脊液和组织液的交换,是脑清除代谢产物和有害物质的重要途径,具有冲洗、洁净脑组织的功能。随着对胶质淋巴系统的深入研究,其在中枢神经系统脱髓鞘疾病致病过程中的作用获得越来越多的关注。本文就胶质淋巴系统的结构、功能及影响因素进行阐述,并对该系统在中枢神经系统脱髓鞘疾病发生、发展中的作用进行综述。

关键词：胶质淋巴系统多发性硬化视神经脊髓炎谱系疾病血管周围间隙

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预加油航班管理方法研究与软件实现

中国民航大学学报 2024年第3期42卷 61-68页

作者：张进奎翟鹏飞王航臣刘虹悦中国南方航空股份有限公司北京分公司北京102600

针对预加油航班需要手工筛选、出错率高、效率较低等问题,设计并实现了一款基于.NET平台的民航飞机预加油软件。首先,阐述了预加油软件的设计原理,根据航油价格的调整时间定义了分类阈值时间,并通过分类阈值时间将需要筛选的航班计划分... 详细信息

针对预加油航班需要手工筛选、出错率高、效率较低等问题,设计并实现了一款基于.NET平台的民航飞机预加油软件。首先,阐述了预加油软件的设计原理,根据航油价格的调整时间定义了分类阈值时间,并通过分类阈值时间将需要筛选的航班计划分为预先加油航班、前段带油航班和停场航班;其次,给出了预先加油航班、前段带油航班和停场航班的概念和筛选原理;然后,介绍了.NET平台的优势以及预加油软件的实现方法,以ExcelDataReader库作为数据输入工具,以C#中的DataTable作为数据存储和处理工具,并分析了跨月航班对字符串数据和整型数据的影响;最后,以中国南方航空股份有限公司在北京大兴国际机场的航班数据为例进行验证,结果表明,所设计开发的预加油航班管理软件可以快速有效地完成3种航班的筛选,相较于手工筛选效率有较大提升。

关键词：航油管理预加油飞行计划运行控制

Space Charge Layer Eff ect in Sulfide Solid Electrolytes in All-Solid-State Batteries: In-situ Characterization and Resolution

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Transactions of Tianjin University 2021年第6期27卷 423-433页

作者： Wei He Lei Zhou Muhammad Khurram Tufail pengfei zhai Peiwen Yu Renjie Chen Wen Yang Key Laboratory of Cluster Science of Ministry of Education Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion MaterialsSchool of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081China School of Material Science and Engineering Beijing Institute of TechnologyBeijing 100081China

All-solid-state lithium batteries(ASSLBs)have advantages of safety and high energy density,and they are expected to become the next generation of energy storage ***-based solid-state electrolytes(SSEs)with high ionic conduc-tivity and low grain boundary resistance exhibit remarkable practical ***,the space charge layer(SCL)eff ect and high interfacial resistance caused by a mismatch with the current commercial oxide cathodes restrict the develop-ment of sulfide SSEs and *** review summarizes the research progress on the SCL eff ect of sulfide SSEs and oxide cathodes,including the mechanism and direct evidence from high performance in-situ characterizations,as well as recent progress on the interfacial modification strategies to alleviate the SCL eff *** study provides future direction to stabilize the high performance sulfide-based solid electrolyte/oxide cathode interface for state-of-the-art ASSLBs and future all-SSE storage devices.

关键词： Sulfide-based solid electrolyte Interfaces Space charge layer All-solid-state batteries

On the Polygonal Wear Evolution of Heavy-Haul Locomotive Wheels due to Wheel/Rail Flexibility and Its Mitigation Measures

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Chinese Journal of Mechanical Engineering 2024年第1期37卷 40-61页

作者： Yunfan Yang Feifan Chai pengfei Liu Liang Ling Kaiyun Wang Wanming zhai State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures Shijiazhuang Tiedao UniversityShijiazhuang 050043China State Key Laboratory of Rail Transit Vehicle System Southwest Jiaotong UniversityChengdu 610031China

Wheel polygonal wear can immensely worsen wheel/rail interactions and vibration performances of the train and track,and ultimately,lead to the shortening of service life of railway *** present,wheel/rail medium-or high-frequency frictional interactions are perceived as an essential reason of the high-order polygonal wear of railway wheels,which are potentially resulted by the flexible deformations of the train/track system or other external *** this work,the effect of wheel/rail flexibility on polygonal wear evolution of heavy-haul locomotive wheels is explored with aid of the long-term wheel polygonal wear evolution simulations,in which different flexible modeling of the heavy-haul wheel/rail coupled system is ***,the mitigation measures for the polygonal wear of heavy-haul locomotive wheels are *** results point out that the evolution of polygonal wear of heavy-haul locomotive wheels can be veritably simulated with consideration of the flexible effect of both wheelset and *** of mixed-line operation of heavy-haul trains and application of multicut wheel re-profiling can effectively reduce the development of wheel polygonal *** research can provide a deep-going understanding of polygonal wear evolution mechanism of heavy-haul locomotive wheels and its mitigation measures.

关键词： Heavy-haul locomotive Wheel polygonal wear Wheel/rail flexibility Long-term polygonal wear evolution Mitigation measures

Effect of 260 MeV Ar Ion Irradiation in YBCO Coated Conductors

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IMP & HIRFL Annual Report 2017年第1期 109-110页

作者： Liu Li Liu Jie zhai pengfei Hu Peipei Li Zongzhen 不详

High temperature superconductor(HTS)materials can reach superconductivity state with the help of liquid nitrogen,thus have more room for *** the critical current density is an important research subject of *** vortices were formed when HTS is in external magnetic *** magnetic vortices will move as the current pass through the HTS,therefore consuming power and producing *** defects produced by heavy ion irradiation can enhance the vortex pinning in HTS,thus improving the critical current density in external magnetic fields[1].

关键词： YBCO consuming superconductor

Swift Heavy Ion Irradiation Induced Band Structure Variation in Monolayer Graphene

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IMP & HIRFL Annual Report 2019年第1期 104-105页

作者： Zeng Jian Duan Jinglai Zhang Shengxia zhai pengfei Yao Huijun Liu Jie 不详

Graphene is a new two-dimensional material with excellent mechanical,thermal,optical and electrical *** has broad application prospect in biomedicine,energy storage materials,field emission materials,quantum computers... 详细信息

关键词： properties. electrical Swift

Irradiation-induced Hillocks in YBCO Single Crystals

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IMP & HIRFL Annual Report 2018年第1期 109-110页

作者： Liu Li Liu Jie zhai pengfei Zeng Jian Hu Peipei Li Zongzhen 不详

Heavy ion irradiation has already become an effective tool for material modification,even for YBa_(2)Cu_(3)O_(7)-δ(Y123),a promising high temperature superconductor(HTS)material for future application[1,2].One-dimensional defects produced by heavy ion irradiation can enhance the vortex pinning in HTS,thus improving the superconducting parameters[3].

关键词： Crystal superconductor vortex