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一种高速动车组电气车钩性能优化研究

机车车辆工艺 2024年第4期60卷 56-60页

作者：杨云波彭国平赵敏中车青岛四方机车车辆股份有限公司山东青岛266111

为了解决某高速动车组在重联工况下多次闪报WTB-A/B路故障,文章通过工作原理分析、现车调查、地面调查等,分析故障原因。研究结果表明:电气车钩插针表面脏污和磨损,影响插针与冠簧之间的接触状态,使其接触不稳定或增大其接触电阻,对信... 详细信息

为了解决某高速动车组在重联工况下多次闪报WTB-A/B路故障,文章通过工作原理分析、现车调查、地面调查等,分析故障原因。研究结果表明:电气车钩插针表面脏污和磨损,影响插针与冠簧之间的接触状态,使其接触不稳定或增大其接触电阻,对信号传输产生了一定影响。与此同时对电气车钩插针、插孔及镀层厚度及冠簧结构进行优化:插针、插孔基材优化;镀金层加厚;插孔内冠簧长度加长等,并通过相关验证及优化前后性能对比,优化方案可行。

关键词：高速动车组 WTB-A/B路故障电气车钩性能优化提升

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永州市冬季大气颗粒物污染特征及来源解析

皮革制作与环保科技 2024年第12期5卷 43-45页

作者：李颖杨韵波全继平力合科技(湖南)股份有限公司湖南长沙410205

本文通过对永州市2021年冬季期间大气污染情况进行分析,研究颗粒物对大气质量的影响程度,并基于颗粒物组分数据和传输模型,对冬季大气污染来源进行解析,为当地后续的大气污染管控防治工作提供科学支撑。结果表明:永州市冬季PM_(2.5)和PM... 详细信息

本文通过对永州市2021年冬季期间大气污染情况进行分析,研究颗粒物对大气质量的影响程度,并基于颗粒物组分数据和传输模型,对冬季大气污染来源进行解析,为当地后续的大气污染管控防治工作提供科学支撑。结果表明:永州市冬季PM_(2.5)和PM_(10)浓度占比达到60.6%,为冬季大气环境质量的主要影响参数。永州市大气污染受到外部输入和本地排放的共同影响,其中本地源占比约为49.5%,外来源占比约为50.5%,PM_(2.5)二次来源中二次硝酸盐占比最高,为32.6%,一次源中机动车源与扬尘源占比相对较高,分别为19.6%、13.4%,表明冬季机动车源与扬尘源是永州市本地的管控重点。

关键词：大气颗粒物冬季来源解析

一期后路经多裂肌和最长肌间隙入路病灶清除植骨内固定治疗成人胸腰椎化脓性脊柱炎

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中国脊柱脊髓杂志 2024年第7期34卷 728-735页

作者：郭沿江杨昀波郑礼鹏杨函杨文成康建平冯大雄王清雷飞西南医科大学附属医院骨科泸州市646000

目的:探讨一期后路经多裂肌和最长肌间隙入路病灶清除植骨融合内固定治疗胸腰椎化脓性脊柱炎的临床疗效。方法:回顾性分析2019年2月~2021年2月在西南医科大学附属医院骨科行一期后路经多裂肌和最长肌间隙入路病灶清除植骨融合内固定术... 详细信息

目的:探讨一期后路经多裂肌和最长肌间隙入路病灶清除植骨融合内固定治疗胸腰椎化脓性脊柱炎的临床疗效。方法:回顾性分析2019年2月~2021年2月在西南医科大学附属医院骨科行一期后路经多裂肌和最长肌间隙入路病灶清除植骨融合内固定术且获得随访的73例胸椎或腰椎化脓性脊柱炎患者,男52例,女21例,年龄35~75岁(56.5±10.7岁)。T1~T1015例,T11~L232例,L3~L526例。局部均有明显后凸畸形,23例伴有椎管内硬膜外脓肿形成,17例伴有椎旁或腰大肌脓肿形成,7例伴神经功能损害[美国脊髓损伤学会(American Spinal Injury Association,ASIA)神经功能分级:C级1例,D级6例]。24例合并心脑血管疾病,35例合并糖尿病,30例有术前有创操作病史。术前取静脉血做细菌培养,均采用一期后路经多裂肌和最长肌间隙入路病灶清除、植骨融合、内固定术治疗,术中取病灶组织做细菌培养,术后持续冲洗10~14d,抗感染治疗6~8周。记录患者手术时间、术中出血量、住院时间和并发症;比较术前和出院前的血沉(erythrocyte sedimentation rate,ESR)、C-反应蛋白(C-reactive protein,CRP)和降钙素原(procalcitonin,PCT);术前、出院前和末次随访时对胸腰背部疼痛行视觉模拟量表(visual analogue scale,VAS)评分;在X线片上测量病灶节段后凸Cobb角,计算后凸畸形矫正率和末次随访矫正丢失角度;末次随访时观察脊髓神经功能恢复状况(ASIA分级)和植骨融合情况。结果:所有患者均成功完成手术,手术时间195.8±15.5min,术中出血量562.1±45.5mL,住院时间18.0±2.0d。9例患者术后出现并发症(12.3%):2例出现谵妄综合征,口服奥氮平后逐渐消失;4例出现下肢疼痛、麻木,给予营养神经等处理后症状消失;3例出现胸腔积液,给予胸腔闭式引流,抗感染,加强肺功能锻炼后治愈。51例细菌培养阳性,金黄色葡萄球菌29例,大肠埃希菌17例,表皮葡萄球菌5例。术前ESR、CRP、PCT分别为80.9±13.9mm/h、58.4±13.5mg/L、0.8±0.2ng/mL,出院前分别为29.6±8.9mm/h、15.0±7.2mg/L、0.1±0.0ng/mL,出院前ESR、CRP、PCT均较术前显著性下降(P<0.05)。随访12~30个月(20.1±4.0个月),术前、出院前和末次随访时的疼痛VAS评分分别为7.6±1.1分、2.2±0.6分、1.6±0.6分,出院前和末次随访时的VAS评分均较术前均显著性降低(P<0.05);Cobb角分别为19.6°±1.6°、6.2°±1.5°、9.4°±1.0°,矫正角度13.4°±0.6°,矫正率68.7%±5.3%,出院前较术前显著性矫正(P<0.05);末次随访时较出院前矫正角度丢失3.2°±0.7°,矫正角度丢失率24.0%±4.6%(P<0.05)。末次随访时1例术前ASIA C级患者恢复至D级,6例D级恢复至E级,术前无神经损伤患者术后均无改变。末次随访时所有患者植骨均达到骨性融合。结论:在抗感染的基础上一期后路经多裂肌和最长肌间隙入路手术治疗胸椎和腰椎化脓性脊柱炎能够实现清除病灶、椎管减压、椎体间支撑植骨融合与固定,同时保护椎旁肌肉以及后方韧带复合体、减少术后慢性胸腰部疼痛。

关键词：化脓性脊柱炎胸椎和腰椎肌肉间隙病灶清除植骨融合内固定

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掘进机截齿侵入煤体破碎程度及产尘特性研究

机械管理开发 2024年第10期39卷 9-11+15页

作者：罗武军刘道园杨云博国能蒙西煤化工股份有限公司

随着掘进作业机械化水平不断提高，粉尘问题日趋严重，为了从掘进机不同截割条件导致煤体破碎产尘差异性的角度实现降尘，基于截割产尘试验系统对掘进机不同截割推进速度、旋转速度和截齿尖锥角度的产尘特性进行研究。研究发现：随着截... 详细信息

随着掘进作业机械化水平不断提高，粉尘问题日趋严重，为了从掘进机不同截割条件导致煤体破碎产尘差异性的角度实现降尘，基于截割产尘试验系统对掘进机不同截割推进速度、旋转速度和截齿尖锥角度的产尘特性进行研究。研究发现：随着截割推进速度的增大，产尘量先减小后增加；随着截割旋转速度或截齿尖锥角度的增大，产尘量均逐渐减小。该研究成果可为掘进工艺参数的调整提供一定的指导意义。

关键词：掘进机割煤截割参数产尘特性

Mn-based permanent magnets

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Chinese Physics B 2018年第11期27卷 55-70页

作者： Jinbo yang Wenyun yang Zhuyin Shao Dong Liang Hui Zhao Yuanhua Xia yunbo yang State Key Laboratory for Mesoscopic Physics School of PhysicsPeking UniversityBeijing 100871China Collaborative Innovation Center of Quantum Matter Beijing 100871China Beijing Key Laboratory for Magnetoelectric Materials and Devices Beijing 100871China Institutes of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621999China

Mn-based intermetallic compounds have attracted much attention due to their fascinating structural and physical properties,especially their interesting hard magnetic *** this paper,we have summarized the magnetic and structural properties of Mn-based intermetallic compounds(Mn X,where X=Al,Bi,and Ga).Various methods for synthesizing single phases of MnAl,MnBi,and Mnx Ga were developed in our lab.A very high saturation magnetization of 125 emu/g,coercivity of 5 kOe,and maximum energy product(BH)_(max)of 3.1 MG·Oe were achieved at room temperature for the pureτ-Mn–Al magnetic phase without carbon doping and the extrusion *** temperature phase(LTP)MnBi with a purity above 95 wt.%can be *** abnormal temperature coefficient of the coercivity was observed for the LTP MnBi *** coercivity increased with temperature from 100 K to 540 K,reached a maximum of 2.5 T at about540 K,and then decreased slowly to 1.8 T at 610 *** positive temperature coefficient of the coercivity is related to the evolution of the structure and magnetocrystalline anisotropy field of the LTP MnBi phase with *** LTP MnBi bonded magnets show maximum energy products(BH)_(max)of 8.9 MG·Oe(70 kJ/m^(3))and 5.0 MG·Oe(40 k J/m^(3))at room temperature and 400 K,*** Mn_(x)Ga phases with L10 structures(x〈2.0)and D0_(22)structures(x〉2.0)were *** of the above structures can be described by a D0_(22)supercell model in which 2 a-Ga and 2 b-Mn are simultaneously *** tetragonal D0_(22)phases of the Mn_(x)Ga show high coercivities ranging from 7.2 kOe for low Mn content x=1.8 to 18.2 kOe for high Mn content x=3 at room *** Mn_(1.2)Ga sample exhibits a room temperature magnetization value of 80 emu/*** hard magnetic properties of coercivityiH_(c)=3.5 kOe,remanence M_(r)=43.6 emu/g,and(BH)_(max)=2.5 MG·Oe were obtained at room *** on the above studies,we believe that Mn-based magnetic materials could

关键词： permanent magnetic materials magnetic properties manganese alloys magnetic structure coercivity magnetization neutron diffraction

Adsorption limitation investigation on olefins for Cu–BTC

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Friction 2024年第4期12卷 606-617页

作者： Xiao yang yunbo WANG Weihua CAO Ruizheng JIANG Guoxin XIE Yuying CAO Xiaowen QI School of Mechanical Engineering Yanshan UniversityQinhuangdao 066004China Key Laboratory of Self-Lubricating Spherical Plain Bearing Technology of Hebei Province Yanshan UniversityQinhuangdao 066004China State Key Laboratory of Tribology in Advanced Equipment Department of Mechanical EngineeringTsinghua UniversityBeijing 100084China Aviation Key Laboratory of Science and Technology on Generic Technology of Self-Lubricating Spherical Plain Bearing Yanshan UniversityQinhuangdao 066004China

To utilize Cu-benzene-1,3,5-tricarboxylate(Cu-BTC)adsorbed lubricant oils in the self-lubricating field,the adsorption properties of Cu-BTC on different 1-olefins must be *** this work,1-hexene,1-octene,1-nonene,1-decene,1-undecene,and 1-dodecene were studied by the Monte Carlo method and *** adsorption limit of Cu-BTC for n-olefins was determined as 1-undecene by the adsorption *** suggested a limit for even straight-chain molecules to the adsorption of *** maximum ratio of the olefin length of the largest pore diameter(L/D)of Cu-BTC was approximately ***,theoretical calculations(radial distribution function(RDF))and experiments(infrared(IR)spectra)confirmed the interaction of n-olefin adsorbates and the Cu-BTC framework occurred between the-CH=of olefins and the Cu and O atoms of the Cu-BTC *** work adds to the understanding and investigation of the adsorption of liquid lubricants using Cu-BTC as a metal-organic framework(MOF).

关键词： metal-organic framework(MOF) Cu-benzene-1,3,5-tricarboxylate(Cu-BTC) Monte Carlo method adsorption properties 1-olefins

Metastable face-centered cubic ruthenium-based binary alloy for efficient alkaline hydrogen oxidation electrocatalysis

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Journal of Energy Chemistry 2024年第5期92卷 207-215页

作者： yunbo Li Jianchao Yue Chaoyi yang Hongnan Jia Hengjiang Cong Wei Luo College of Chemistry and Molecular Sciences Wuhan UniversityWuhan 430072HubeiChina

Metastable nanostructured electrocatalyst with a completely different surface environment compared to conventional phase-based electrocatalyst often shows distinctive catalytic *** Ru-based electrocatalysts have been widely investigated toward hydrogen oxidation reaction(HOR)under alkaline electrolytes,these studies are mostly limited to conventional hexagonal-close-packed(hcp)phase,mainly arising from the lack of sufficient synthesis *** this study,we report the precise synthesis of metastable binary RuW alloy with face-centered-cubic(fcc)*** find that the introduction of W can serve as fcc phase seeds and reduce the formation energy of metastable fcc-RuW ***,fcc-RuW exhibits remarkable alkaline HOR performance and stability with the activity of 0.67 mA cm_(Ru)^(-2)which is almost five and three times higher than that of hcp-Ru and commercial Pt/C,respectively,which is attributed to the optimized binding strength of adsorbed hydroxide intermediate derived from tailored electronic structure through W doping and phase ***,this strategy can also be applied to synthesize other metastable fcc-RuCr and fcc-RuMo alloys with enhanced HOR performances.

关键词： Hydrogen oxidation reaction Metastable phase Face-centered cubic(fcc) Ru Phase engineering

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基于虚拟标定技术的换挡规律标定方法研究

汽车工程师 2024年第9期 21-26页

作者：王小峰陈国栋李岩杨云波张学锋中国第一汽车股份有限公司研发总院长春130013

基于虚拟标定技术进行了自动变速器换挡规律仿真研究,首先建立高精度物理模型(包括发动机、变速器及整车主要零部件等),利用已知的变速器控制单元(TCU)控制策略搭建变速器控制模型或直接在虚拟仿真平台接入TCU控制器,利用硬件在环(HiL)... 详细信息

基于虚拟标定技术进行了自动变速器换挡规律仿真研究,首先建立高精度物理模型(包括发动机、变速器及整车主要零部件等),利用已知的变速器控制单元(TCU)控制策略搭建变速器控制模型或直接在虚拟仿真平台接入TCU控制器,利用硬件在环(HiL)仿真平台进行TCU标定及相关工况仿真测试,并将仿真结果与试验数据进行对比,结果表明,基于模型的虚拟标定技术可满足换挡规律标定精度要求,并有效缩短标定时间、提升标定质量。

关键词：换挡规律硬件在环虚拟标定

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Flexible metal–organic frameworks based self-lubricating composite

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Friction 2024年第8期12卷 1816-1827页

作者： Xiao yang yunbo WANG Weihua CAO Jinghan ZHENG Changxin LIU Bingli FAN Xiaowen QI School of Mechanical Engineering Yanshan UniversityQinhuangdao 066004China Key Laboratory of Self-Lubricating Spherical Plain Bearing Technology of Hebei Province Yanshan UniversityQinhuangdao 066004China Aviation Key Laboratory of Science and Technology on Generic Technology of Self-Lubricating Spherical Plain Bearing Yanshan UniversityQinhuangdao 066004China Department of Materials.Imperial College London London SW72AZUK

To expand the use of metal–organic frameworks(MOFs)based self-lubricating composite,flexible MOFs MIL-88D has been studied as a nanocontainer for loading *** this work,the mechanism of oleamine adsorption and desorption by MIL-88D was investigated through molecular simulations and *** simulations showed that the oleamines can be physically adsorbed into open MIL-88Ds with the Fe and O atoms of MIL-88D interacting with oleamine *** temperature can cause Ole@MIL-88D to release more oleamines,while higher pressure on Ole@MIL-88D caused less oleamines *** the Ole@MIL-88D was incorporated into epoxy resin(EP)for friction *** optimum mass ratio of MIL-88D to EP is 15 wt%,and the EP/Ole@MIL-88D prefers light load and high frequency *** work suggests that flexible MOFs can be used as a nanocontainer for loading lubricant,and can be used as a new self-lubricating composite.

关键词： self-lubricating composite metal–organic framework(MOFs) MIL-88D molecular dynamic(MD)simulation