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Journal of Hydrodynamics 2009年第5期21卷 614-621页

作者： ZHANG Jin-hong yan chang-qi GAO Pu-zhen College of Nuclear Science and Technology Harbin Engineering University Harbin 150001 China

Gas-liquid two-phase flow occurs increasingly in some dynamic devices operating in the oceanic condition. The relative data are limited with respect to flow characteristics, so the present study is to investigate systematically single-phase pressure drop, and to develop the theory for frictional factor under the roiling condition. Using deionized water as the test fluid, a series of experiments of single-phase flow were conducted in pipe with the inner diameter of 34.5 ram. The test section was horizontally settled on the rolling apparatus, and its regularity was similar to simple harmonic motion. It is found that the pressure drop during rolling motion fluctuate with the change of the rolling period and rolling angle, which is significantly different from fluid motion in a steady state. By the contrast between experiment results and stable-state theory values, existing correlations can not predict present frictional factor very well. Therefore, in the present article, the single-phase frictional factor is correlated with the Reynolds number for rolling motion, and its computated results agree well with experimental data.

关键词： single-phase flow pressure drop friction factor horizontal pipe rolling motion

Possibility of using strain F9(Serratia marcescens) as a bio-collector for hematite flotation

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International Journal of Minerals,Metallurgy and Materials 2014年第3期21卷 210-215页

作者： Hui-fen yang Tian Li yan-hong chang Hui Luo Qiong-yao Tang Civil and Environmental Engineering School University of Science and Technology Beijing State Key Laboratory for High-Efficiency Mining and Safety of Metal Mines Ministry of Education

In this study, we characterized strain F9 and evaluated the interaction between strain F9 and hematite by scanning electron microscopy（SEM）, Fourier transform infrared spectrophotometry（FTIR）, zeta potential, flotation, and other methods. The results showed that strain F9 belongs to Serratia marcescens. This brevibacterium had CH2, CH3, and hydroxyl groups on its cell wall, which imparted a strong hydrophobic and negative charge. Adsorption of strain F9 reduced the zeta potential of the hematite surface and increased the hydrophobicity of the hematite surface, thereby generating hydrophobic hematite agglomerates. At least four groups on strain F9 interacted with the hematite surface, which contributed to chemical interactions of carboxylic groups and hydrophobic association among hydrophobic hematite particles. The possible use of strain F9 as a bio-collector for hematite flotation was proved.

关键词： microorganisms Serratia marcescens flotation hydrophobicity hematite

Pyrolyzed bacterial cellulose/graphene oxide sandwich interlayer for lithium–sulfur batteries

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Rare Metals 2017年第5期36卷 418-424页

作者： Yu-Di Shen Zhi-chang Xiao Li-Xiao Miao De-Bin Kong Xiao-Yu Zheng yan-hong chang Lin-Jie Zhi Chinese Academy of Sciences Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and Technology Beijing 100190China Department of Environmental Engineering University of Science and Technology of BeijingBeijing 100083China Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants University of Science and Technology of BeijingBeijing 100083China Institute of Forensic Science Ministry of Public SecurityBeijing 100038China

Herein, a facile strategy for the synthesis of sandwich pyrolyzed bacterial cellulose（PBC）/graphene oxide（GO） composite was reported simply by utilizing the large-scale regenerated biomass bacterial cellulose as precursor. The unique and delicate structure where three-dimensional interconnected bacterial cellulose（BC） network embedded in two-dimensional GO skeleton could not only work as an effective barrier to retard polysulfide diffusion during the charge/discharge process to enhance the cyclic stability of the Li–S battery, but also offer a continuous electron transport pathway for the improved rate *** a result, by utilizing pure sulfur as cathodes, the Li–S batteries assembled with PBC/GO interlayer can still exhibit a capacity of nearly 600 mAh·g^-1 at 3C and only 0.055% capacity decay per cycle can be observed over 200 cycles. Additionally, the cost-efficient and environmentfriendly raw materials may enable the PBC/GO sandwich interlayer to be an advanced configuration for Li–S batteries.

关键词： Biomass materials Graphene oxide Separator Lithium–sulfur batteries

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近代人力车夫群体意识探析

华中师范大学学报（人文社会科学版） 2007年第6期46卷 63-71页

作者：严昌洪华中师范大学中国近代史研究所湖北武汉430079

人力车夫是伴随着人力车的传入而出现的一个新的城市下层社会职业群体。该群体由城市贫民、进城农民和其他失业人员构成,人数众多,具有素质低和流动性、分散性等特点。他们通过相互之间的微弱联系和与外界的比较形成了同行意识、同乡意... 详细信息

人力车夫是伴随着人力车的传入而出现的一个新的城市下层社会职业群体。该群体由城市贫民、进城农民和其他失业人员构成,人数众多,具有素质低和流动性、分散性等特点。他们通过相互之间的微弱联系和与外界的比较形成了同行意识、同乡意识和穷人意识等初级的群体意识。经过知识界的启蒙和共产党的教育,他们的群体意识提升到阶级意识、民族意识的高度,并为了无产阶级的解放、为了捍卫国家和民族的利益进行了积极的斗争。文章指出,人力车夫群体意识的提升有赖于本阶级的认同,社会的接纳,国家的帮助,有赖于启蒙、灌输、培养。人力车夫所带来的社会问题的解决,需要全社会对他们更多的理解、同情、关怀和引导。

关键词：人力车夫群体意识阶级意识民族意识

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孙中山发展教育提高国民素质的努力

中南民族大学学报（人文社会科学版） 2007年第3期27卷 120-126页

作者：严昌洪华中师范大学中国近现代史研究所湖北武汉430079

本文从提高国民素质的角度论述孙中山的教育思想,指出孙中山针对国民素质低下的一些表现,提出了提高国民素质的目标:一是培养德、智、体全面发展的人才;二是养成具有较高素质的国民。为了实现这一目标,他大力推行普及教育,积极提倡教育... 详细信息

本文从提高国民素质的角度论述孙中山的教育思想,指出孙中山针对国民素质低下的一些表现,提出了提高国民素质的目标:一是培养德、智、体全面发展的人才;二是养成具有较高素质的国民。为了实现这一目标,他大力推行普及教育,积极提倡教育平等,重视教师素质的提高,热情支持女子教育,极力促进教育改革,同时非常关注社会教育。从孙中山发展教育提高国民素质的思想中,可看到中国传统与西方文明的多重影响,并有与时俱进、与国情结合的价值选择。

关键词：孙中山国民素质教育

近代东南社会“贱民”群体的复权意识与复权斗争

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史林 2005年第4期 23-26,84页

作者：严昌洪华中师范大学中国近代史研究所 430079

近代东南不同地区的“户”、“九姓渔户”、“堕民”、“伴当”、“世仆”、“小姓”、“丐户”,都是事实上的“贱民”群体。这些“贱民”处于社会的最底层,以操“贱业”为生,不得与其他平民通婚,备受歧视与欺压。清朝初年,官府颁布了... 详细信息

近代东南不同地区的“户”、“九姓渔户”、“堕民”、“伴当”、“世仆”、“小姓”、“丐户”,都是事实上的“贱民”群体。这些“贱民”处于社会的最底层,以操“贱业”为生,不得与其他平民通婚,备受歧视与欺压。清朝初年,官府颁布了一些上谕和法令以解放“贱民”,但这些法令很不彻底,而且“贱民”很少争取出籍,所以这一解放是被动的。直到清末民初,才出现“贱民”主动的复权意识和复权斗争。

关键词： “贱民” 复权意识复权斗争

马路上的对抗——民国时期人力车夫管理问题透视

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湖北大学学报（哲学社会科学版） 2010年第2期37卷 16-24页

作者：严昌洪华中师范大学中国近代史研究所湖北武汉430079

民国时期人力车夫骤增,带来包括流动人口问题、社会治安问题、交通秩序问题在内的一系列社会问题。政府当局和租界当局为缓解人力车夫带来的社会问题的压力,对人力车夫加以管理,不仅加强了日常管理,也协调人力车夫与各方面的关系,解决... 详细信息

民国时期人力车夫骤增,带来包括流动人口问题、社会治安问题、交通秩序问题在内的一系列社会问题。政府当局和租界当局为缓解人力车夫带来的社会问题的压力,对人力车夫加以管理,不仅加强了日常管理,也协调人力车夫与各方面的关系,解决人力车夫与车行、与其他交通行业之间的矛盾冲突,在取缔人力车过程中也对人力车夫施以各种救济。但由于管理主体与被管理者的对立,管理产生了负面效应,导致马路上的对抗。当局取缔人力车的举措,终因在解决失业车夫出路问题和解决城市交通替代问题上缺乏可行的制度安排,遭到广大人力车夫及社会各界的抵制而失败。

关键词：民国人力车夫问题当局管理对抗

Utilizing BP neural networks to accurately reconstruct the tritium depth profile in materials for BIXS

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Nuclear Science and Techniques 2025年第1期36卷 103-114页

作者： Chen Zhao Wei Jin yan Shi chang-An Chen Yi-Ying Zhao Institute of Materials China Academy of Engineering PhysicsJiangyou 621908China

β-ray-induced X-ray spectroscopy(BIXS)is a promising method for tritium detection in solid materials because of its unique advantages,such as large detection depth,nondestructive testing capabilities,and low requirements for sample ***,high-accuracy reconstruction of the tritium depth profile remains a significant challenge for this *** this study,a novel reconstruction method based on a backpropagation(BP)neural network algorithm that demonstrates high accuracy,broad applicability,and robust noise resistance is *** average reconstruction error calculated using the BP network(8.0%)was much lower than that obtained using traditional numerical methods(26.5%).In addition,the BP method can accurately reconstruct BIX spectra of samples with an unknown range of tritium and exhibits wide applicability to spectra with various tritium ***,the BP network demonstrates superior accuracy and stability compared to numerical methods when reconstructing the spectra,with a relative uncertainty ranging from 0 to 10%.This study highlights the advantages of BP networks in accurately reconstructing the tritium depth profile from BIXS and promotes their further application in tritium detection.

关键词： β-ray-induced X-ray spectroscopy Tritium detection BP network Ridge regression Reconstruction problem

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抗战期间日本对华文化侵略述论

中南民族大学学报（人文社会科学版） 2005年第4期25卷 10-15页

作者：严昌洪黎霞华中师范大学中国近代史研究所湖北武汉430079

抗日战争期间,日本侵略者对中国实施了政治、经济、军事、文化等一系列侵略暴行。本文从日本对华文化侵略的政策及组织、对中华文化的劫掠与摧残、实行文化专制与奴化教育等三个方面概括论述日本对华文化侵略的历史罪行。

关键词：抗日战争文化侵略文化专制奴化教育

Oxidation of n-Butanol and 2-Pentanol with Molecular Oxygen in Supercritical CO2

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Chinese Chemical Letters 2003年第10期14卷 1070-1072页

作者： yan hong chang, Tao JIANG, Liang GAO, Quo Ying ZHAO, Hai Xiang GAO, Zhong Hao LI, Jun Chun LI, Zhi Min Liu, Bu Xing HANCenter for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences,Beijing 100080 Center for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences

Oxidation of n-butanol and 2-pentanol using molecular oxygen in supercritical (SC) CO2 with and without co-solvent is investigated. The results showed that the reaction selectivity is high when the reaction is carried out in SC CO2. It has been observed that co-solvent affects conversion and selectivity of the reaction considerably.

关键词： Oxidation,n-butanol 2-pentanol supercritical CO2 co-solvent.