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基于打磨量曲线的重载铁路钢轨打磨模式设计

华东交通大学学报 2024年第3期41卷 101-109页

作者：贾军许玉德吴琰超余佳磊中国神华能源股份有限公司轨道机械化维护分公司天津300467 同济大学交通运输工程学院上海201804 上海欣铁机电科技有限公司上海200100 不详

【目的】为解决目前重载钢轨大机打磨作业过程中存在的依靠经验选择打磨模式和打磨结果无法预测的问题。【方法】以GMC-96X大型钢轨打磨列车作为研究对象,通过MATLAB数值模拟,研究不同打磨模式的作用效果;并且结合打磨列车砂轮分布形式... 详细信息

【目的】为解决目前重载钢轨大机打磨作业过程中存在的依靠经验选择打磨模式和打磨结果无法预测的问题。【方法】以GMC-96X大型钢轨打磨列车作为研究对象,通过MATLAB数值模拟,研究不同打磨模式的作用效果;并且结合打磨列车砂轮分布形式,建立钢轨打磨基本模式库,提出了一种基于打磨量曲线的重载铁路钢轨打磨模式设计方法。【结果】现场试验结果表明:采用该方法设计的打磨模式包含了打磨列车各个砂轮的摆布角度,可直接输入到打磨列车控制系统,更为贴合实际应用;并且通过打磨前钢轨实测廓形、理论打磨后钢轨廓形和实际打磨后钢轨廓形三者的对比,验证了该方法的可靠性。【结论】该打磨模式设计方法实现了重载铁路钢轨打磨模式的自动生成和轨头廓形的精确修理。

关键词：钢轨打磨打磨模式钢轨廓形

Adsorption Activity and Molecular Dynamics Study on Anti-corrosion Mechanism of Q235 Steel

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Chemical Research in Chinese Universities 2018年第5期34卷 817-822页

作者： ZHANG Weiwei LI Huijing wu yanchao LUO Qi LIU Huanhuan NIU Lin School of Marine Science and Technology Harbin Institute of Technology Weihai 264209 P. R. China School of Chemistry and Chemical Engineering Shandong University Jinan 250100 P. R. China

The correlation between inhibition efficiency and molecular structures of the inhibitor during hydrochloric acid corrosion of Q235 steel was studied by quantum chemical calculations and molecular dynamics（MD） simulation. The proton affmity（PA） calculations demonstrated that 2-（quinolin-2-yl）quinazolin4（3H）-one inhibitor has the ten- dency to be protonated in hydrochloric acid, which was in good agreement with experimental observations. Besides, quantum chemical parameters revealed that the protonated corrosion inhibitor molecules were more easily adsorbed on Q235 steel surface and improved the corrosion resistance of steel. MD simulations were implemented to search for the adsorption behavior of this molecule on Fe （110） surface, which might be used as a convenient tool for estimating the interaction mechanism between inhibitor and iron surface.

关键词： Q235 steel Corrosion inhibition Density functional theory Molecular dynamic simulation

Study on the effect of Fresh Air Ventilation system for reducing indoor ^(222)Rn

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Radiation Medicine and Protection 2024年第1期5卷 49-52页

作者： yanchao Song Dexing Lian Hongxing Cui Changsong Hou Yunyun wu Key Laboratory of Radiological Protection and Nuclear Emergency National Institute for Radiological ProtectionChinese Center for Disease Control and PreventionBeijing 100088China National Center for Occupational Safety and Health NHCBeijing 102308China

Objective:To explore the reduction effect for the indoor ^(222)Rn(Rn)by Fresh Air Ventilation(FAV)system,a novel commercial ventilation device in ***:The indoor concentrations of Rn and its decay products(RnD)in three residential rooms,two in Beijing and one in Hefei city,Anhui province,before and after FAVS functioned were measured using an active continuous *** air exchange rate was monitored by measuring CO_(2) concentration using the tracer gas ***:In the three rooms,the FAVS reduced the Rn concentrations from(162±80)Bq/m^(3) to(63±22)Bq/m^(3) and decreased the RnD concentrations from(64±35)Bq/m^(3) to(13±6)Bq/m^(3) on average,a decrease of(59±25)% in the Rn concentrations and a drop of(77±18)%in the RnD *** dose conversion factors of Rn and RnD,FAVS decreased the exposure dose by(76±20)%.Besides,FAVS increased the air exchange rates from 0.17 h^(-1) to 0.56 h^(-1) on ***:FAVS can effectively reduce indoor Rn and RnD concentrations by improving the air exchange,serving as a valuable supplement to existing radon mitigation methods,especially in extreme climates.

关键词： FAVS Rn Decay product Air exchange rate

A branched dihydrophenazine-based polymer as a cathode material to achieve dual-ion batteries with high energy and power density

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eScience 2021年第1期1卷 60-68页

作者： Shuaifei Xu Huichao Dai Shaolong Zhu yanchao wu Mingxuan Sun Yuan Chen Kun Fan Chenyang Zhang Chengliang Wang Wenping Hu School of Optical and Electronic Information Wuhan National Laboratory for Optoelectronics(WNLO)Huazhong University of Science and TechnologyWuhan 430074China Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistrySchool of SciencesTianjin UniversityTianjin 300072China

Organic electrode materials have exhibited good electrochemical performance in batteries,but their voltages and rate capabilities still require improvement to meet the increasing demand for batteries with high energy and power ***,we design and synthesize a branched dihydrophenazine-based polymer(p-TPPZ)as a cathode material for dual-ion batteries(DIBs)through delicate molecular *** with the linear dihydrophenazine-based polymer(p-DPPZ,with a theoretical capacity of 209 mAh g^(−1)),p-TPPZ possessed a higher theoretical capacity of 233 mAh g^(−1)and lower highest occupied molecular orbital energy levels,which resulted in a high actual capacity(169.3 mAh g^(−1)at 0.5 C),an average discharge voltage of 3.65 V(***+/Li)and a high energy density(618.2 Wh kg^(−1),based on the cathode materials).The branched structure of p-TPPZ led to a larger specific surface area than that of p-DPPZ,which was beneficial for the electrolyte infiltration and fast ionic transport,contributing to the high power *** to the fast reaction kinetics,even at a power density of 23,725 W kg^(−1)(40 C),the energy density still reached 474.5 Wh kg^(−1).We also made a detailed investigation of the p-TPPZ cathode’s charge storage *** work will stimulate the further molecular design to develop organic batteries with both high energy and power density.

关键词： Organic dual-ion batteries Branched polymers Dihydrophenazine-based polymers Organic cathodes Conjugated porous materials

Diradicals or Zwitterions: The Chemical States of m-Benzoquinone and Structural Variation after Storage of Li Ions

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CCS Chemistry 2022年第8期4卷 2768-2781页

作者： Chenyang Zhang Yong Zhang Kun Fan Qian Zou Yuan Chen yanchao wu Songsong Bao Limin Zheng Jing Ma Chengliang Wang School of Optical and Electronic Information Wuhan National Laboratory for Optoelectronics(WNLO)Optics Valley LaboratoryHuazhong University of Science and TechnologyWuhan 430074Hubei School of Chemistry and Chemical Engineering Nanjing UniversityNanjing 210093Jiangsu

m-Benzoquinones are often regarded as unstable materials in the form of ***,an air-stable small molecular m-benzoquinone[4,6-diamino-1,3-benzoquinone(4,6DA1,3BQ)]without bulky groups or large conjugated systems is reported,and its chemical structure and state are profoundly elucidated by a series of substantial investigations that indicate their presence as zwitterions rather than as diradicals.

关键词： organic lithium-ion batteries intermolecular interactions zwitterions radicals hydrogen bonding

Analysis and Monitoring of Indoor Radon Concentrations of 37 Kindergartens — Beijing Municipality, China, 2023

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China CDC weekly 2024年第13期6卷 272-276页

作者： Meinan Yao Kuke Ding Xiaozhe Tang Yunyun wu yanchao Song Shuyuan Liu Bin Bai Li Zhang Yongzhong Ma Institute for Radiation Hygiene Protection Beijing Center for Disease Prevention and ControlBeijingChina Chinese Center for Disease Control and Prevention BeijingChina Key Laboratory of Radiological Protection and Nuclear Emergency&National Institute for Radiological Protection Chinese Center for Disease Control and PreventionBeijingChina

Introduction:Radon(222Rn or 222radon)is a radioactive gas emitted from building materials,foundations,and *** are especially susceptible to radon exposure,underscoring the need to assess indoor radon levels in *** study monitored radon concentrations in 37 Beijing kindergartens from June to October ***:A random sample of 37 kindergartens was selected from 18 administrative districts in *** indoor radon concentration was measured using the solid track accumulation method,with radon detectors continuously monitored over a 3-month ***:The mean indoor radon level in 37 kindergartens,observed at 252 monitoring points,was 84.3 Bq/m^(3),with values varying from 12.9 to 263.5 Bq/m^(3).About 20.2%of points showed radon levels between 100.0 and 200.0 Bq/m^(3),while 2.4%exceeded 200.0 Bq/m^(3).Notably,radon levels were significantly elevated on the ground floor compared to the upper ***:Indoor radon levels in 37 kindergartens remained below the national standard limit of 300.0 Bq/m^(3) for buildings(GB/T 16146-2015).Nonetheless,18.9%of the kindergartens exceeded the 100.0 Bq/m^(3) limit set for new *** is advised to improve radon monitoring in kindergartens and consider developing a national standard for maximum permissible radon levels in such facilities.

关键词： Radon limit floor

原位渗硼激光熔覆FeCoCrNiMn涂层的摩擦学性能研究及其在齿轮修复中的应用

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表面工程与再制造 2024年第3期24卷 65-67页

作者： Dongya Zhang Xiaoyu Suo JinYuan Liu Zhongwei Li yanchao Zhang Hongxing wu Key Laboratory of Manufacturing Equipment of the Shaanxi Province School of Mechanical and Precision Instrument Engineering Xi’an University of Technology Xi’an PR China State Key Laboratory of Solidification Processing Center of Advanced Lubrication and Seal Materials Northwestern Polytechnical University 710072 Xi’an China

高速重载的机械作业中,齿轮易发生点蚀、粘着和磨损,从而导致轮齿断裂和磨损失效。本文通过激光熔覆与渗硼集成的方式对失效齿轮进行修复实验,并对其摩擦学性能和修复后振动特性进行了系统研究。与母材相比,硼化物表面的平均硬度提高了8... 详细信息

高速重载的机械作业中,齿轮易发生点蚀、粘着和磨损,从而导致轮齿断裂和磨损失效。本文通过激光熔覆与渗硼集成的方式对失效齿轮进行修复实验,并对其摩擦学性能和修复后振动特性进行了系统研究。与母材相比,硼化物表面的平均硬度提高了8.37倍,耐磨性提高了15.60倍。

关键词：激光熔覆平均硬度渗硼硼化物机械作业摩擦学性能磨损失效高速重载

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海产品中重金属脱除的研究进展

食品科学 2018年第19期39卷 266-272页

作者：王婷婷吴彦超李惠静哈尔滨工业大学(威海)海洋科学与技术学院山东威海264209

近年来由于土壤、河流、海洋中重金属污染日益严重,我国海产品普遍出现有害重金属超标的问题,严重影响我国海产品的食用和药用安全。因此,脱除海产品中有害重金属的研究受到广泛关注。本文着重综述了两种海产品中有害重金属脱除的方法:... 详细信息

近年来由于土壤、河流、海洋中重金属污染日益严重,我国海产品普遍出现有害重金属超标的问题,严重影响我国海产品的食用和药用安全。因此,脱除海产品中有害重金属的研究受到广泛关注。本文着重综述了两种海产品中有害重金属脱除的方法:活体重金属净化法和蛋白酶解液重金属脱除法,同时提出了海产品中有害重金属脱除方法研究的新趋势。

关键词：海产品重金属蛋白酶解液脱除

中药内服加塞肛辅以盆腔炎治疗仪治疗慢性盆腔炎45例

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中国中医药现代远程教育 2017年第6期15卷 48-50页

作者：吴艳超辽宁省本溪市妇幼保健所妇保科本溪117000

目的观察丹黄祛瘀胶囊口服,康妇消炎栓塞肛,辅以盆腔炎治疗仪对慢性盆腔炎的疗效。方法选用2014年5月—2016年5月收治的90例盆腔炎患者作为研究对象,随机分为2组,每组45例。治疗组用丹黄祛瘀胶囊每次4粒、日三次口服,康妇消炎栓每晚睡... 详细信息

目的观察丹黄祛瘀胶囊口服,康妇消炎栓塞肛,辅以盆腔炎治疗仪对慢性盆腔炎的疗效。方法选用2014年5月—2016年5月收治的90例盆腔炎患者作为研究对象,随机分为2组,每组45例。治疗组用丹黄祛瘀胶囊每次4粒、日三次口服,康妇消炎栓每晚睡前一枚塞肛,辅用盆腔炎治疗仪治疗,每日2次,上午、下午各1次。对照组单用丹黄祛瘀胶囊口服和康妇消炎栓塞肛。以14天为1疗程,共3个疗程。经期停用。观察两组治疗3个疗程后患者临床症状、体征及盆腔B超的变化,以及停药3个月后的复发率。结果对观察组和对照组在治疗结束3个月后评价治疗效果。观察组治愈率96%,复发率2%;对照组治愈率71%,复发率15%。治疗组与对照组比较有显著差异。结论盆腔炎治疗仪配合中药内服加塞肛疗法疗效显著,具有良好的临床效果。

关键词：妇科丹黄祛瘀胶囊康妇消炎栓盆腔炎治疗仪慢性盆腔炎中医药疗法物理疗法带下病