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概念车——飞碟巴士的发展与应用

交通节能与环保 2024年第1期20卷 58-61页

作者：武慧洁张飞军徐广彬吉林建筑大学交通科学与工程学院吉林长春130118 长春工程学院汽车工程学院吉林长春130012

飞碟巴士作为一种新型的公共交通概念车,载客量大,运行速度快,可以有效缓解交通拥堵,提高上下班高峰时段的道路通行效率,优化城市公共交通的产业结构。本文研究了飞碟巴士的组成、分类和结构,对比城市传统公共交通、快速轨道交通,阐述... 详细信息

飞碟巴士作为一种新型的公共交通概念车,载客量大,运行速度快,可以有效缓解交通拥堵,提高上下班高峰时段的道路通行效率,优化城市公共交通的产业结构。本文研究了飞碟巴士的组成、分类和结构,对比城市传统公共交通、快速轨道交通,阐述了其优点和不足,提出了飞碟巴士推广应用中存在的问题。飞碟巴士的未来发展,对于开创城市交通陆上空间利用的模式,促进公共交通发展具有十分重要的意义。

关键词：公共交通概念车飞碟巴士发展应用

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Direct generation of Zn metal using laser-induced ZnS to eradicate carbon emissions from electrolysis Zn production

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Frontiers of Environmental Science & Engineering 2024年第1期18卷 83-95页

作者： Ying Chen Ning Duan Linhua Jiang Fuyuan xu guangbin Zhu Yao Wang Yong Liu Wen Cheng Yanli xu State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China School of Environmental Science and Engineering Tianjin UniversityTianjin 300350China School of Materials Science and Engineering Anhui University of Science&TechnologyHuainan 232001China

In response to the goal of net-zero emissions proposed by Intergovernmental Panel on Climate Change, Chinese government has pledged that carbon emissions will peak by 2030, and achieve carbon neutrality by 2060. However, the high carbon energy structure of traditional industries has aggravated environmental problems, such as greenhouse effect and air pollution. The goal of carbon neutrality will be difficult to achieve without the development of disruptive theories and technologies. The electrolytic zinc industry requires high-temperature roasting at ~1000 ℃, generating large amounts of greenhouse gases and SO_(2). High concentrations of sulfuric acid (200 g/L) are subsequently used for electrolysis, and each ton of zinc produced generates 50 kg of anode slime with lead content of up to 16%, as well as 0.35 m3 of wastewater containing zinc and lead. To solve these problems, an optical metallurgy method is proposed in this study. The proposed method uses laser-induced photoreduction to decompose ZnS and reduce metal ions to metal. Results indicate that Zn0 and S8 can be detected on the surface of ZnS at a specific wavelength and laser fluence. The generation mechanism of Zn0 is such that laser induces an electronic transition that breaks ionic bond in ZnS, resulting in its decomposition and photoreduction to Zn0 under an inert argon gas atmosphere. This method does not reduce other metals in the mineral since it does not use high-temperature roasting, providing a new way of producing high-purity metal without greenhouse gas emissions and heavy metal pollution caused by traditional zinc electrolysis.

关键词： Laser metallurgy ZnS Photochemical reduction Zinc

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长内花键轴向进给滚轧成形过程材料流动行为

重型机械 2024年第3期 47-53页

作者：徐光斌张大伟刘秋彤鞠辉李绪成陈林佺中国重汽集团济南动力有限公司山东济南250220 西安交通大学西安市智能装备与控制重点实验室陕西西安710049

轴向进给滚轧是一种局部加载、轴向增量变形的塑性成形工艺,为长内花键提供了一种高性能、省力成形制造途径。采用数值方法研究分析了采用3滚轧模具的传动轴花键毂内花键轴向进给滚轧过程的材料流动行为。结果表明:材料的流动和变形主... 详细信息

轴向进给滚轧是一种局部加载、轴向增量变形的塑性成形工艺,为长内花键提供了一种高性能、省力成形制造途径。采用数值方法研究分析了采用3滚轧模具的传动轴花键毂内花键轴向进给滚轧过程的材料流动行为。结果表明:材料的流动和变形主要发生在坯料的内表层,外表面基本没有材料流动;内花键轴向进给滚轧过程材料流动速度沿轴向逐渐减小,而累积的材料位移在不同成形区分布基本类似,只是位移量值有区别;不同滚轧模具切入区结构下滚轧过程中材料流动、位移的分布特征和演化特征类似,采用斜切式滚轧模具的滚轧过程中材料轴向流动倾向大于采用径缩式滚轧模具的滚轧过程轴向材料流动。

关键词：长内花键花键滚轧轴向进给滚轧材料流动材料位移

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Tribological properties and tribomechanism of nickel nanoparticles in-situ synthesized in rapeseed oil

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Friction 2024年第3期12卷 474-489页

作者： Wenya xu guangbin YANG Shengmao ZHANG Jun xu Yujuan ZHANG Tianhua SUN Ningning SONG Laigui YU Pingyu ZHANG Engineering Research Center for Nanomaterials Henan UniversityKaifeng 475004China State Key Laboratory of Tribology in Advanced Equipment Tsinghua UniversityBeijing 100084China

Nickel(Ni)nanoparticles can be enriched on the surface of iron-based frictional pairs,which provides the possibility to get rid of the competitive adsorption between the polar species of vegetable oil and the surface-active nano-additives *** this paper,nickel acetylacetonate was used as a precursor to in-situ synthesize nickel nanoparticles with an average diameter of about 12 nm in rapeseed oil(RO)as the reducing agent,surface modifier,and solvent as *** tribological properties of the as-synthesized Ni nanoparticles were evaluated with a four-ball tribometer,and their tribomechanism was investigated based on the characterizations of the tribofilm on rubbed steel surfaces by the scanning electron microscopy(SEM),transmission electron microscopy(TEM),and X-ray photoelectron spectroscopy(XPS).It was found that the Ni nanoparticles in-situ prepared in the RO with a mass fraction of 0.3%can reduce the wear scar diameter(WSD)of the steel ball by 36%.This is because,on the one hand,the Ni nanoparticles are adsorbed on the rubbed steel surfaces to repair or fill up the micro-pits and grooves *** the other hand,Ni nanoparticles participate in tribochemical reactions with atmospheric O and steel substrate to form the tribochemical reaction film on the rubbed steel surfaces with the assistance of friction-induced heat and applied normal *** addition,an amorphous carbon film is formed on the rubbed surface via the carbonization of base oil under the catalysis of Ni *** adsorbed Ni layer,the tribochemical reaction film,and the carbon layer comprise a composite tribofilm composed of amorphous carbon,polar fatty acid,metallic nickel,iron oxides,and nickel oxides on the rubbed steel surfaces,which contributes to significantly improving the antiwear ability and load-carrying capacity of the RO for the steel-steel sliding pair.

关键词： nickel(Ni)nanoparticles rapeseed oil(RO) in-situ synthesis tribological properties tribomechanism

Achieving Ultra-Broad Microwave Absorption Bandwidth Around Millimeter-Wave Atmospheric Window Through an Intentional Manipulation on Multi-Magnetic Resonance Behavior

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Nano-Micro Letters 2024年第9期16卷 291-307页

作者： Chuyang Liu Lu xu xueyu Xiang Yujing Zhang Li Zhou Bo Ouyang Fan Wu Dong‑Hyun Kim guangbin Ji School of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 210016JiangsuPeople’s Republic of China School of Materials Science and Engineering Nanjing University of Science and TechnologyNanjing 210094JiangsuPeople’s Republic of China School of Physics Nanjing University of Science and TechnologyNanjing 210094JiangsuPeople’s Republic of China School of Mechanical Engineering Nanjing University of Science and TechnologyNanjing 210094JiangsuPeople’s Republic of China School of Physics Chungbuk National UniversityCheongju 28644South Korea Department of Chemistry School of ScienceTianjin UniversityTianjin 300072People’s Republic of China

The utilization of electromagnetic waves is rapidly advancing into the millimeter-wave frequency range,posing increasingly severe challenges in terms of electromagnetic pollution prevention and radar ***,existing millimeter-wave absorbers are still inadequate in addressing these issues due to their monotonous magnetic resonance *** this work,rare-earth La^(3+)and non-magnetic Zr^(4+)ions are simultaneously incorporated into M-type barium ferrite(BaM)to intentionally manipulate the multi-magnetic resonance *** leveraging the contrary impact of La^(3+)and Zr^(4+)ions on magnetocrystalline anisotropy field,the restrictive relationship between intensity and frequency of the multi-magnetic resonance is successfully *** magnetic resonance peak-differentiating and imitating results confirm that significant multi-magnetic resonance phenomenon emerges around 35 GHz due to the reinforced exchange coupling effect between Fe^(3+)and Fe^(2+)***,Mosbauer spectra analysis,first-principle calculations,and least square fitting collectively identify that additional La^(3+)doping leads to a profound rearrangement of Zr^(4+)occupation and thus makes the portion of polarization/conduction loss increase *** a consequence,the La^(3+)-Zr^(4+)co-doped BaM achieves an ultra-broad bandwidth of 12.5+GHz covering from 27.5 to 40+GHz,which holds remarkable potential for millimeter-wave absorbers around the atmospheric window of 35 GHz.

关键词： Microwave absorption Ultra-broad bandwidth M-type barium ferrite Magnetocrystalline anisotropy field Multimagnetic resonance

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经由可逆碳碳键断裂的去消旋化反应

Science Bulletin 2024年第3期69卷 285-287页

作者：许言董广彬 Beijing National Laboratory for Molecular Sciences(BNLMS) Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Department of Chemistry University of ChicagoChicago IL 60637USA

Asymmetric catalysis has proven remarkably successful in achieving enantioselective control during the construction of new stereogenic ***,the challenge of achieving chiral enrichment at pre-existing stereogenic centers,without introducing additional molecular variations,remains a rare and intriguing pursuit known as asymmetric stereochemical editing[1–3].

关键词： catalysis stereo pursuit

沉管砂石桩技术在某工业建筑地基处理中的应用

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建筑结构 2022年第S2期52卷 2470-2473页

作者：黄刚邓义虎徐光彬湖北省电力勘测设计院有限公司武汉430040

某工业建筑地面要求较高的地基的承载力,在原始地基承载力或沉降不能满足荷载要求时,一般要对地基进行人工强化处理。通过工程实际,介绍了在锂电池厂房地面地基处理工程中沉管砂石桩技术的设计、施工、检测及效果。表明了沉管砂石桩在... 详细信息

某工业建筑地面要求较高的地基的承载力,在原始地基承载力或沉降不能满足荷载要求时,一般要对地基进行人工强化处理。通过工程实际,介绍了在锂电池厂房地面地基处理工程中沉管砂石桩技术的设计、施工、检测及效果。表明了沉管砂石桩在加固冷却塔地基工程中技术上是可行的,在施工质量和处理效果上可以满足要求,复合地基承载力和沉降都得到了较大的改善。

关键词：沉管砂石桩技术承载力沉降

Trading Based on Persistent STEP Messaging:a 'Solid' Step towards a More Open Chinese Stock Market

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Trading Based on Persistent STEP Messaging:a 'Solid' Step to...

The 2012 International Conference on Future Computer Supported Education(FCSE 2012)

作者： guangbin xu Jueying Tao Shanghai Stock Exchange Shanghai University of Finance and Economics

This paper introduces the evolution of the STEP protocol:the first Chinese securities information exchange standard,which is of full compatibility to the world de-facto FIX protocol and is officially issued in *** challenges of applying STEP to the China’s stock market are also *** propose a practical solution to address these *** trading businesses on the Chinese market based on the solutions are also ***,the future of the STEP and the prospects of its application are presented.

关键词： Securities information exchange FIX STEP Stock exchange Stock Market

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并行证券核心交易仿真系统设计与实现

系统仿真学报 2019年第6期31卷 1128-1135页

作者：徐广斌上海证券交易所资本市场研究所

中国证券市场已成长为国际上举足轻重的金融定价中心,作为市场核心设施的证券核心交易系统同期完成了多次的更新换代。目前,我国沪、深两个交易所均采用先进的第三代并行核心交易系统。为支持沪深市场环境下的交易仿真实验,比照现行第... 详细信息

中国证券市场已成长为国际上举足轻重的金融定价中心,作为市场核心设施的证券核心交易系统同期完成了多次的更新换代。目前,我国沪、深两个交易所均采用先进的第三代并行核心交易系统。为支持沪深市场环境下的交易仿真实验,比照现行第三代证券核心交易系统,设计和实现了单机下的并行证券核心交易仿真系统,该系统支持集合竞价、连续竞价、混合竞价等多种竞价模式和全档实时行情,可支持并行扩展,系统性能与功能达到与真实系统相当的水平。

关键词：并行处理证券交易核心交易系统交易仿真