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Review on formation mechanism analysis method and control strategy of urban haze in China

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Chinese Journal of Chemical Engineering 2019年第7期27卷 1572-1577页

作者： Weiqing Huang Lirong Cai Haifeng Dang Zhe Jiao hongbo fan Faliang Cheng School of Environment and Civil Engineering Guangdong Engineering and Technology Research Center for Advanced NanomaterialsDongguan University of TechnologyDongguan 523808China Guangdong Provincial Key Lab of Green Chemical Product Technology South China University of TechnologyGuangzhou 510640China

Due to the rapid urbanization and industrialization,and excessive consumption of fossil fuel,haze weather characterized by PM2.5 has become a severe pollution problem in major Chinese cities recently,which has harmful effect on the air quality,visibility,clime system and human *** indicate suitable directions for the prevention and control of haze pollution,the pollutant source apportionment and formation mechanism of urban haze should be figured out *** this work,we briefly review the frequently-used methods for PM2.5 source apportionment and formation mechanism analysis of urban haze based on normal perspective in recent ***,based on the new perspective of systematic methodology,the utilization of fault tree approach for the causation mechanism analysis of urban haze is significantly introduced and ***,the recent progress on controlling strategies of urban haze in China is also synoptically introduced and *** is expected that more effective tool/method can be found,developed and employed for the causation mechanism analysis and risk management of urban haze in China.

关键词： Urban haze Fossil fuel Formation Sustainability

Enhanced tensile plasticity of a CuZr-based bulk metallic glass composite induced by ion irradiation

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Journal of Materials Science & Technology 2019年第10期35卷 2221-2226页

作者： Peng Xue Simon Pauly Weimin Gan Songshan Jiang hongbo fan Zhiliang Ning Yongjiang Huang Jianfei Sun State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China IFW Dresden Institute for Complex MaterialsHelmholtzstraβe 20D-01069 DresdenGermany German Engineering Materials Science Centre(GEMS)at Heinz Maier-Leibnitz Zentrum(MLZ) Helmholtz-Zentrum Geesthacht GmbHGarchingGermany Key Laboratory of Micro-systems and Microstructures Manufacturing(Harbin Institute of Technology) Ministry of EducationHarbinChina

N^+ ion irradiation is utilized to tune the structure and mechanical properties of a Cu48Zr47.2Al4Nb0.8 bulk metallic glass composite(BMGC). Ion irradiation increases the disorder near the surface, as probed by neutron diffraction, and, moreover, causes the phase transformation from B2Cu Zr to B19’ CuZr martensitic phase in the studied BMGC. The tensile plasticity of the BMGC is dramatically improved after ion irradiation, which results from multiple shear banding on the surface and the martensitic transformation of the B2 to B19’ Cu Zr martensitic phase. The experimental results are strongly corroborated by complementary molecular dynamic simulations.

关键词： Bulk metallic glass composite Ion irradiation Neutron diffraction Molecular dynamics simulation Mechanical properties

Relating microstructure to magnetocaloric properties in RE_(36)Tb_(20)Co_(20)Al_(24)(RE=Gd,Dy or Ho)high-entropy metallic-glass microwires designed by binary eutectic clusters method

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Journal of Materials Science & Technology 2023年第18期149卷 167-176页

作者： Hangboce Yin Jun-Qiang Wang Yongjiang Huang Hongxian Shen Shu Guo hongbo fan Juntao Huo Jianfei Sun School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China CAS Key Laboratory of Magnetic Materials and Devices and Zhejiang Province Key Laboratory of Magnetic Materials and Application TechnologyNingbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo 315201China Center for Analysis Measurement and Computing Harbin Institute of TechnologyHarbin 150001China Space Environment Simulation Research Infrastructure Harbin Institute of TechnologyHarbin 150001China

The new high-entropy metallic-glasses(HE-MGs)are designed by using Dy and Ho to replace Gd in Gd_(36)Tb_(20)Co_(20)Al_(24)alloy based on the binary eutectic clusters *** with the equiatomic Gd 25 Tb 25 Co 25 Al 25 HE-MG,the non-equiatomic RE_(36)Tb_(20)Co_(20)Al_(24)(RE=Gd,Dy,or Ho)alloys show bet-ter glass-forming ability,which is attributed to the deep binary eutectic compositions used for alloy *** RE_(36)Tb_(20)Co_(20)Al_(24)alloys undergo second-order magnetic *** extreme peak value of magnetic entropy change is obtained as 10.3 J kg^(-1) K-1(5 T)for the Ho_(36)Tb_(20)Co_(20)Al_(24)***-situ high-energy synchrotron X-ray diffraction was conducted to observe the microstructural difference among non-equiatomic samples at cryogenic *** results indicate that Gd_(36)Tb_(20)Co_(20)Al_(24)alloy possesses a relatively large average value of the dispersion of local clusters at a low-temperature ***,com-bined with the critical exponentβclose to 0.5 of Gd_(36)Tb_(20)Co_(20)Al_(24)alloy,leads to its widest working temperature span among non-equiatomic *** work successfully establishes the connection be-tween microstructure and magnetocaloric properties of HE-MGs,which is beneficial for understanding the physical mechanism of the magnetocaloric behaviors of HE-MGs.

关键词： High-entropy metallic-glass Magnetocaloric effect High energy synchrotron X-ray diffraction Cryogenic temperature

Factors affecting production of nonaqueous peracetic acid in tubular packed reactors

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Frontiers of Chemical Science and Engineering 2008年第2期2卷 196-203页

作者： Tengyun ZHANG Li ZHONG Karl T.CHUANG hongbo fan Department of Chemical&Biological Engineering Dongguan University of TechnologyDongguan 523808China College of Chemistry and Chemical Engineering South China University of TechnologyGuangzhou 510640China Department of Chemical&Materials Engineering University of AlbertaEdmontonAB CanadaT6G 2G6

The synthesis of nonaqueous peracetic acid inacetone by acetaldehyde oxidation was carried out in atubular packed reactor. The influencing factors of thereacting system including packing material, oxygen carrier,and reactor configuration were investigated. Theresults show that porous materials are inappropriate forperacetic acid synthesis and only non porous materialwith appropriate surface area can provide good peraceticacid selectivity and yield. Among the six kinds of packingmaterial investigated, SA-5118 is the best one. As oxidizinggas, pure oxygen is superior to air. The optimumlength-to-inner diameter ratio of the reactor is about *** the proper reaction conditions, the highest peraceticacid yield of 84.15% and the highest selectivity of93.34% can be achieved which indicates that the novelreacting system is effective and economical for nonaqueousperacetic acid production.

关键词： back mixing tubular packed reactor peracetic acid acetaldehyde

MICROSTRUCTURE　AND　TENSILE　PROPERTIES　OF　RAPIDLY　SOLIDIFIED　Al－3．8Li－0．8Mg－0．4Cu－0．13Zr　ALLOY　PREPARED　BY　SPRAY　DEPOSITION

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Acta Metallurgica Sinica(English Letters) 1996年第1期9卷 37-43页

作者： CUI Chengsong fan hongbo SHEN Jun JIANG Zuling LI Qingchun(Department of Metallic Materials and Technology,Harbin Institute of Technology,Harbin 150001,China) Harbin Inst of Technology Harbin China

Al-3.8Li-0.8Mg-0.4Cu-0.13Zr alloy was prepared by a novel spray deposition technique,and its microstructure and tensile properties after various aging treatments have been investigated. The experimental results show that the alloy,under study has very fine equiaxed grains about 5-20μm in diameter and a relative density of(94±3)% on *** in the as-extruded alloy are'brick-like'in morphology,and few oxide particles have been found al the grain boundaries.δ' particles with irregular shape and'δ'-β''coprecipitates appear in the aged *** coarsening of δ'particles is fast,and the distance between the particles does not widen so obviously as that of IM(ingot-casting method) alloys with increasing aging *** spray deposited Al-Li *** the peak-aged condition in a short time(10 h al 190℃) when the best properties(σb=534 MPa, σ0.2=480 MPa.δ=10%) are *** with RSPM(rapid solidification processing method)Al-Li alloy,the ductility of the tested alloy has been *** while a comparable tensile strength is maintained.

关键词： spray deposition rapid solidification Al-Li alloy microstructure tensile property

Recent advances in solar cells and photo-electrochemical water splitting by scanning electrochemical microscopy

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Frontiers of Optoelectronics 2018年第4期11卷 333-347页

作者： Xiaofan ZHANG Man LIU Weiqian KONG hongbo fan Henan Provincial Key Laboratory of Nanocomposite and Applications Institute of Nanostmctured Functional Materials Huanghe Science and Technology CollegeZhengzhou 450006China School of Environment and Civil Engineering Dongguan University of TechnologyDongguan 523808China

Investigation on the mechanism and kinetics of charge transfer at semiconductor/electrolyte interface is significant for improving the photoelectric conversion efficiency and developing novel and high-efficiency photovoltaic devices. Scanning electrochemical microscopy (SECM), as a powerful analytical technique, has a potential advantage of high spatial and temporal resolution. It has been expanded into a broad range of research fields since the first inception of SECM in 1989 by Bard groups, which includes biological, enzymes, corrosion, energy conversion and storage (such as solar cells, hydrogen and battery). Herein, we review the basic principles and the development of SECM, and chiefly introduce the recent advances of SECM investigation in photoelectrochemical (PEC) cells including solar cells and PEC water splitting. These advances include rapid screening of photocatalysts/photoelectrodes, interfacial reaction kinetics and quantitation of reaction intermediates, which is significant for evaluating the performance, choosing catalysts and developing novel composite photoanodes and high efficiency devices. Finally, we briefly describe the development trends of SECM in energy research.

关键词： scanning electrochemical microscopy (SECM) solar cells photoelectrochemical (PEC) water splitting screening kinetics intermediates

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高级AC自动机的快速构建方法

计算机研究与发展 2013年第12期50卷 2699-2706页

作者：范洪博姚念民昆明理工大学信息工程与自动化学院昆明650504 大连理工大学计算机科学与技术学院辽宁大连116085

高级AC(advanced AC,AAC)是一种基于自动机的多模式串匹配算法,应用极为广泛.在大规模匹配时AAC自动机构建耗时较大.改进了经典精确单模式匹配算法——DFA算法自动机构建过程,并将其扩展到多模式匹配领域,提出Set DFA自动机,并证明Set ... 详细信息

高级AC(advanced AC,AAC)是一种基于自动机的多模式串匹配算法,应用极为广泛.在大规模匹配时AAC自动机构建耗时较大.改进了经典精确单模式匹配算法——DFA算法自动机构建过程,并将其扩展到多模式匹配领域,提出Set DFA自动机,并证明Set DFA自动机和AAC自动机一致.该自动机构建方法简单清晰,无需计算失败函数,自动机内每个状态在生成后只需访问一次即可完成自动机构建.实验表明Set DFA构建时间只有AAC自动机的一半左右.

关键词：串匹配多模式自动机失败函数高级AC

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一种高速精确单模式串匹配算法

计算机研究与发展 2009年第8期46卷 1341-1348页

作者：范洪博姚念民哈尔滨工程大学计算机科学与技术学院哈尔滨150001 绥化学院计算机科学与技术系黑龙江绥化152000

串匹配问题是计算机科学的基础问题之一,是网络安全、信息检索与过滤、计算生物学等众多领域的核心问题,其中,高速精确单模式匹配算法设计又是各种串匹配问题的基础.基于SBNDM2,通过修改位掩码有效位到无符号整数的高位,将BNDM算法核心... 详细信息

串匹配问题是计算机科学的基础问题之一,是网络安全、信息检索与过滤、计算生物学等众多领域的核心问题,其中,高速精确单模式匹配算法设计又是各种串匹配问题的基础.基于SBNDM2,通过修改位掩码有效位到无符号整数的高位,将BNDM算法核心循环化简至最简形式(5指令/字符),并引入越界保护机制,提出S2BNDM系列精确单模式匹配算法.实验结果显示,S2BNDM系列算法在任何情况下都快于SBNDM2,对于英文语料(m<32)和DNA序列(m<8),S2BNDM系列算法为现有已知最快算法.

关键词：串匹配精确单模式算法设计位并行文本搜索

尖晶石LiMn2O4纳米棒的合成和储锂性能

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中南大学学报（自然科学版） 2020年第11期51卷 3211-3219页

作者：周钢陈月皎范洪波东莞理工学院生态环境与建筑工程学院广东东莞523808 中南大学粉末冶金国家重点实验室湖南长沙410083

为了改善LiMn2O4材料在锂离子电池应用中倍率放电性能和循环性能较差的问题,利用纳米化尺寸改善方案,对二维LiMn2O4纳米棒的储锂应用进行研究。通过水热法合成的α-MnO2纳米线与LiOH·H2O进行固相烧结制备尖晶石结构的LiMn2O4纳米棒,探... 详细信息

为了改善LiMn2O4材料在锂离子电池应用中倍率放电性能和循环性能较差的问题,利用纳米化尺寸改善方案,对二维LiMn2O4纳米棒的储锂应用进行研究。通过水热法合成的α-MnO2纳米线与LiOH·H2O进行固相烧结制备尖晶石结构的LiMn2O4纳米棒,探讨水热反应时间、温度和反应物物质的量比对前驱体α-MnO2形貌结构和性能的影响。研究结果表明:制备的LiMn2O4纳米棒比表面积大,有利于缩短Li^+扩散距离,较大的长径比可减少循环过程中材料的团聚,从而赋予LiMn2O4优异的循环性能。LiMn2O4纳米棒在1C倍率充放电时初始放电容量为104.8 mA·h/g,循环150圈时依旧可以保持初始容量的84.4%,而在3C倍率充放电时可以保持初始容量的75%,显示了较高的电化学储锂性能。

关键词：水热合成固相烧结锰酸锂纳米棒锂离子电池储锂性能