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磁场调制永磁直线电机拓扑研究综述

中国电机工程学报 2021年第4期41卷 1469-1484页

作者：周游石超杰曲荣海李大伟高玉婷强电磁工程与新技术国家重点实验室(华中科技大学电气与电子工程学院) 湖北省武汉市430074 卡尔斯鲁厄理工学院德国卡尔斯鲁厄76131

基于磁场调制原理(即磁齿轮效应)的磁场调制永磁直线电机(flux-modulation linear permanent magnet machines,FMLPMMs),具有更高的推力密度与更低的推力波动,近年来是直线电机领域的研究热门之一。该文旨在对磁场调制永磁直线电机拓扑... 详细信息

基于磁场调制原理(即磁齿轮效应)的磁场调制永磁直线电机(flux-modulation linear permanent magnet machines,FMLPMMs),具有更高的推力密度与更低的推力波动,近年来是直线电机领域的研究热门之一。该文旨在对磁场调制永磁直线电机拓扑结构方面的研究工作进行系统性综述。首先,介绍磁场调制永磁直线电机的拓扑结构演变历程,并对现有拓扑结构进行分类和归纳。其次,由于推力密度与推力波动是直线电机最为重要的两大性能参数,因此该文就如何进一步提升磁场调制永磁电机的推力密度、抑制推力波动进行详细介绍。最后,结合磁场调制永磁直线电机各个拓扑结构的特点,对其未来的发展方向和应用前景进行展望。

关键词：磁场调制永磁直线电机推力密度推力波动发展趋势

埋地管道受地铁杂散电流干扰的缓解方法及效果数值模拟

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北京交通大学学报 2020年第3期44卷 19-29页

作者：董亮石超杰陈树新刘佳姚知林常州大学石油工程学院江苏常州213164 保定安泰评价有限公司河北保定071051 中国石油天然气管道工程有限公司河北廊坊065000

埋地管道受地铁杂散电流干扰影响而在电流流出管段存在腐蚀风险,为有效缓解此类干扰,构建了具有多个牵引区间、排流网、地铁接地系统的地铁系统以及与其交叉的埋地管道及其阴极保护系统模型,选取了典型的以轨道泄漏杂散电流干扰为主和... 详细信息

埋地管道受地铁杂散电流干扰影响而在电流流出管段存在腐蚀风险,为有效缓解此类干扰,构建了具有多个牵引区间、排流网、地铁接地系统的地铁系统以及与其交叉的埋地管道及其阴极保护系统模型,选取了典型的以轨道泄漏杂散电流干扰为主和以局部集中接地泄漏杂散电流干扰为主的干扰情形主要缓解对象,分别设计了埋地管道侧、管轨连接方式以及地铁系统侧常见缓解方法的细化方案,基于数值模拟方法采用专业软件计算获得了不同缓解方案下埋地管道电位分布变化、地铁系统泄漏杂散电流分布等.基于此,分析总结了不同缓解方案的缓解效果.结果表明:设计的缓解方案均可有效缓解轨道泄漏杂散电流造成的干扰,而难以有效缓解局部集中接地泄漏杂散电流造成的干扰,应配合采取有效措施严格限制此类干扰累计出现时间,以满足埋地管道防护要求.

关键词：地铁杂散电流缓解效果数值模拟埋地管道干扰

Si纳米线/ZnFe_(2)O_(4)/AgBr光催化剂的构建及其磁场可调控性能

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石油学报（石油加工） 2023年第5期39卷 1082-1091页

作者：张仕杰史超杰唐继霞钱图梁丽丽李雪辰田禾贺婕杨正春天津理工大学天津市薄膜电子与通信器件重点实验室天津300384 天津理工大学天津市先进机电系统设计与智能控制重点实验室天津300384 天津理工大学机电工程国家级实验教学示范中心天津300384

采用金属辅助化学刻蚀法和水热法制备了Si纳米线/ZnFe_(2)O_(4)/AgBr复合光催化剂,考察了Si纳米线/ZnFe_(2)O_(4)/AgBr在磁场作用下的光催化性能。结果表明:Si纳米线/ZnFe_(2)O_(4)/AgBr复合光催化剂在未使用HNO_(3)溶液浸泡且无磁场作... 详细信息

采用金属辅助化学刻蚀法和水热法制备了Si纳米线/ZnFe_(2)O_(4)/AgBr复合光催化剂,考察了Si纳米线/ZnFe_(2)O_(4)/AgBr在磁场作用下的光催化性能。结果表明:Si纳米线/ZnFe_(2)O_(4)/AgBr复合光催化剂在未使用HNO_(3)溶液浸泡且无磁场作用时的光电流密度为0.25 mA/cm^(2),开启电压为0.4 V;Si纳米线/ZnFe_(2)O_(4)/AgBr复合材料在合成时表面会产生Ag,采用HNO_(3)溶液将其浸泡除去Ag,浸泡后光电流密度为0.07 mA/cm^(2),相比于未使用HNO_(3)溶液浸泡时的光电流密度明显下降,这是由于Ag具有传输电子与空穴的能力,可加快ZnFe_(2)O_(4)和Si纳米线间光生电子和光生空穴对的分离,从而提高光电流密度;当外加80000 A/m磁场时,其光电流密度增加至0.2 mA/cm^(2),开启电压为0.28 V,表明磁场可显著提高该复合光催化剂的光催化效率。Si纳米线/ZnFe_(2)O_(4)/AgBr界面处的能带弯曲加快了光生载流子的传输,减少了光生空穴与光生电子间的复合,使更多的电子和空穴可参与到光催化过程中,进而提高了体系的光催化性能。在光催化过程中,外加磁场使体系所产生的光生载流子可以更快速地传输至光催化剂表面,进一步增强体系的光催化效率。

关键词： Si纳米线 ZnFe_(2)O_(4)/AgBr 光催化磁场光电流密度能带弯曲

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硫酸铜参比电极用多孔陶瓷头的制备与性能

常州大学学报（自然科学版） 2021年第3期33卷 9-16页

作者：董亮吴桐姚知林石超杰赵会军常州大学石油工程学院江苏常州213164

以滑石粉为主要原料,通过调节原料粒径、烧成温度、黏合剂用量、成型压力和烧成方式等参数,制备了多种硫酸铜参比电极(CSE)用多孔陶瓷头。测试分析了多孔陶瓷头的孔隙率、孔径及形貌结构、收缩率等性能参数,选取3种多孔陶瓷头制作了便... 详细信息

以滑石粉为主要原料,通过调节原料粒径、烧成温度、黏合剂用量、成型压力和烧成方式等参数,制备了多种硫酸铜参比电极(CSE)用多孔陶瓷头。测试分析了多孔陶瓷头的孔隙率、孔径及形貌结构、收缩率等性能参数,选取3种多孔陶瓷头制作了便携式硫酸铜参比电极并测试了其电极电位长期稳定性及寿命。结果表明,原料粒径、烧成温度、成型压力对多孔陶瓷头的孔径和孔隙率影响较大,随着原料粒径的减小、烧成温度的增加、成型压力增大,孔径和孔隙率随之减小;采用孔径约为522 nm、孔隙率为17.4%的多孔陶瓷头制作的便携式参比电极的电极电位长期稳定性较好,通过计算估算寿命可达4.2 a。

关键词：参比电极多孔陶瓷孔径孔隙率

Numerical Investigation on Thermal Performance of Two-Phase Immersion Cooling Method for High-Power Electronics

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Frontiers in Heat and Mass Transfer 2024年第1期22卷 157-173页

作者： Liqun Zhou Weilin Yang chaojie Li shi Lin College of Petrochemical Engineering Lanzhou University of TechnologyLanzhou730050China College of Environment and Safety Engineering Qingdao University of Science and TechnologyQingdao266042China College of Artificial Intelligence Yango UniversityFuzhou350015China

The power density of electronic components grows continuously,and the subsequent heat accumulation and temperature increase inevitably affect electronic equipment’s stability,reliability and service ***,achieving efficient cooling in limited space has become a key problem in updating electronic devices with high performance and high ***-phase immersion is a novel cooling *** computational fluid dynamics(CFD)method is used to investigate the cooling performance of two-phase immersion cooling on high-power *** two-dimensional CFD model is utilized by the volume of fluid(VOF)method and Reynolds ***’s model was employed to calculate the phase change *** heat transfer coefficient along the heatedwalls and the shear-lift force on bubbles are *** simulation data are verified with the literature *** cooling performance of different coolants has been *** results indicate that the boiling heat transfer coefficient can be enhanced by using a low boiling point *** methanol is used as the cooling medium for further *** addition,the mass flow rate and inlet temperature are investigated to assess the thermal performance of twophase immersion *** average temperature of the high-power electronics is 80℃,and the temperature difference can be constrained to 8℃.Meanwhile,the convective heat transfer coefficient reaches 2740 W/(m2・℃)when the inlet temperature is 50℃,and the mass flow rate is 0.3 kg/*** conclusion,the results demonstrated that two-phase immersion cooling has provided an effective method for the thermal management of high-power electronics.

关键词： Immersion cooling operating condition high-power electronics thermal management

Theoretical investigations on the growth of graphene by oxygenassisted chemical vapor deposition

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Nano Research 2024年第6期17卷 4645-4650页

作者： Xiaoli Sun chaojie Yu Yujia Yang Zhihao Li Jianjian shi Wanjian Yin Zhongfan Liu Beijing Graphene Institute(BGI) Beijing 100095China School of Physics and Electronics Shandong Normal UniversityJinan 250014China College of Energy Soochow Institute for Energy and Materials InnovationsLight Industry Institute of Electrochemical Power SourcesSUDA-BGI Collaborative Innovation CenterSoochow UniversitySuzhou 215006China School of Electronic Engineering Chengdu Technological UniversityChengdu 611730China Center for Nanochemistry Beijing National Laboratory for Molecular SciencesCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China

Recently,graphene has drawn considerable attention in the field of electronics,owing to its favorable conductivity and high carrier *** to the industrialization of graphene is its high-quality microfabrication via chemical vapor ***,many problems remain in its preparation,such as the not fully understood cracking mechanism of the carbon source,the mechanism of its substrate oxidation,and insufficient defect repair *** help close this capability gap,this study leverages density functional theory to explore the role of O in graphene *** effects of Cu substrate oxidation on carbon source cracking,nucleation barriers,crystal nucleus growth,and defect repairs are *** was found to reduce energy change during dehydrogenation,rendering the process ***,the adsorbed O in graphene or its Cu substrate can promote defect repair and edge growth.

关键词： density functional theory oxygen-assisted graphene growth chemical vapor deposition Cu substrate

某核电厂汽轮发电机组调试期间振动数据分析及处理

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中国核电 2023年第6期16卷 889-893页

作者：唐兆轩颜军明时朝杰冯志超卓亮辉李毅中核霞浦核电有限公司福建霞浦355100

汽轮发电机组运行过程中,机组轴系振动是其运行状态的重要参数,对评估机组运行安全有较大的作用。汽轮发电机组如果在运行过程中出现异常振动,则易引起机组停机。本文主要论述了国内某核电机组调试期间,在非核蒸汽冲转、核蒸汽冲转等其... 详细信息

汽轮发电机组运行过程中,机组轴系振动是其运行状态的重要参数,对评估机组运行安全有较大的作用。汽轮发电机组如果在运行过程中出现异常振动,则易引起机组停机。本文主要论述了国内某核电机组调试期间,在非核蒸汽冲转、核蒸汽冲转等其他试验工况或功率平台下汽轮发电机组的振动情况,对期间发生的振动爬升现象进行原因分析以及给出了处理建议,最后总结了机组轴系振动情况的经验反馈。

关键词：汽轮发电机组轴系振动动静碰磨

A Soy Protein-Based Composite Film with a Hierarchical Structure Inspired by Nacre

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Journal of Renewable Materials 2022年第3期10卷 639-652页

作者： Yecheng Xu chaojie Xu Mingsong Chen Jianzhang Li Ling Zeng Jing Luo Qiang Gao Sheldon Q.shi Beijing Key Laboratory of Wood Science and Engineering&MOE Key Laboratory of Wooden Material Science and Application Beijing Forestry UniversityBeijing100083China Nanning SCISKY Waterborne Technologies Co. Ltd.Nanning530105China College of Materials Science and Engineering Nanjing Forestry UniversityNanjing210037China College of Engineering Department of Mechanical and Energy EngineeringUniversity of NorthTexasDenton76207-7102USA

Soy protein-based composite film is a potential replacement for petroleum-based film with multipurpose applica-tions and cleaner *** is difficult to improve both the tensile strength and toughness of a protein-based film without sacrificing its *** this study,inspired by the hierarchical structure of nacre,a facile yet delicate strategy was developed to fabricate a novel bio-based film with excellent toughness and high ***(TGA)crosslinked soy protein(SPI)as hard phase and thermoplastic polyurethane elastomer(TPU)as soft phase comprise an alternative lay-up hierarchical *** interface of these two phases is enhanced using triglycidylamine(TGA)surface-modified TPU(MTPU).The tensile strength of SPI/MTPU/TGA films increases by 392%to 7.78 MPa and their toughness increases by 391%to 8.50 MJ/m^(3) compared to soy protein/glycerol *** proposed hierarchical structure can also be extended to other high-performance materials and polymers.

关键词： Soy protein-based composite film hierarchical structure TPU enhancement mechanism

A robust polyacrylic acid/chitosan cryogel for rapid hemostasis

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Science China(Technological Sciences) 2022年第5期65卷 1029-1042页

作者： shi MingYue JIANG LiJie YU chaojie DONG XiaoRu YU QingYu YAO MengMeng HE ShaoShuai YUE ZhiWei YAO FangLian ZHANG Hong SUN Hong LI JunJie School of Chemical Engineering and Technology Tianjin UniversityTianjin300350China School of Basic Medical Sciences North China University of Science and TechnologyTangshan063210China Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering Ministry of EducationTianjin UniversityTianjin300350China

Currently,it is a challenge to develop hemostatic materials with high water absorption capacity and anti-fatigue properties for quickly preventing massive hemorrhage from arteries and visceral organs.A series of polyacrylic acid/chitosan(PAA/CS)cryogels were prepared by a cryostructurization technique to improve mechanical performance and hemostatic efficiency of chitosan(CS).In this system,the chemically cross-linked PAA network was used as a framework to improve water absorption behaviors and mechanical *** CS network was co-blended by hydrogen bonding and electrostatic interactions,both of which synergistically promoted *** cryogels had high porosity(>94%),rapid water absorption rate(2000%),outstanding mechanical strength,and fatigue ***,the results of cytotoxicity and hemolysis demonstrated that the cryogels had good ***,the PAA/CS cryogels exhibited superior whole blood coagulation ability and red blood cell and platelet adhesion ability compared to those of commercial hemostatic dressing(gauze,gelatin sponges,and CS sponges).Based on these results,mouse femoral artery hemorrhage models and liver hemorrhage models were prepared to investigate the hemostatic ability of the prepared PAA/CS *** suggested that the hemostatic ability of PAA5/CS cryogels was superior to that of commercial hemostatic ***,the PAA/CS cryogels showed potential application in preventing massive hemorrhage from arteries and visceral organs.

关键词： hemostatic dressing chitosan polyacrylic acid cryogel