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21st International Conference on Composite Materials, ICCM 2017

作者： Liu, Zenghua Zhong, xuwen Chen, Honglei he, Cunfu Wu, Bin College of Mechanical Engineering and Applied Electronics Technology Beijing University of Technology Beijing100124 China

Imaging detection of composite plates is presented based on reconstruction algorithm for the probabilistic inspection of damage (RAPID) and double-turn coil omnidirectional shear-horizontal wave magnetostrictive patch transducer (OSH-MPT) array. The lowest shear-horizontal mode (SH0) can propagate in the composite plate through bonding double-turn coil OSH-MPT. RAPID can realize using the direct wave of SH0 mode to extract the damage information. It is beneficial to detect composite plate in the case that the velocity of direct waves varies with the propagation direction. A small mass which is circular cylinder is bonded to simulate damage. Imaging results are achieved after using modified methods for eliminating the influence of the uneven probability distribution of the array (UPDA) in RAPID. Threshold is selected based on the receiver operating characteristic (ROC) curve for improving RAPID-based imaging accuracy. © 2017 International Committee on Composite Materials. All rights reserved.

关键词： Composite plate Damage imaging Magnetostrictive patch transducer RAPID Shear-horizontal waves

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2种壳色梨形环棱螺贝壳7种金属元素质量分数比较分析

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中国农学通报 2019年第21期35卷 148-151页

作者：金武闻海波马学艳何义进邴旭文中国水产科学研究院淡水渔业研究中心/中美淡水贝类种质资源保护及利用国际联合实验室

利用电感耦合等离子体质谱(ICP-MS)对梨形环棱螺(Bellamya purificata)青色和紫色贝壳的7种金属元素质量分数进行了比较分析。结果显示:紫色梨形环棱螺贝壳中铁(Fe)质量分数显著高于青色贝壳。青色贝壳中钾(K)、镁(Mg)、锰(Mn)的含量显... 详细信息

利用电感耦合等离子体质谱(ICP-MS)对梨形环棱螺(Bellamya purificata)青色和紫色贝壳的7种金属元素质量分数进行了比较分析。结果显示:紫色梨形环棱螺贝壳中铁(Fe)质量分数显著高于青色贝壳。青色贝壳中钾(K)、镁(Mg)、锰(Mn)的含量显著高于紫色贝壳,钠(Na)、锶(Sr)、锌(Zn)元素含量在两种壳色贝壳中差异不显著。贝壳中Fe含量和K、Mg、Mn的含量呈显著负相关,与Sr、Zn含量的相关性不显著。K、Mg、Mn、Na的4种元素含量呈显著正相关。

关键词：梨形环棱螺壳色金属元素

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Catalytic wet air oxidation of phenol with functionalized carbon materials as catalysts:Reaction mechanism and pathway

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Journal of Environmental Sciences 2014年第8期26卷 1741-1749页

作者： Jianbing Wang Wantao Fu xuwen he Shaoxia Yang Wanpeng Zhu School of Chemical and Environmental Engineering Beijing CampusChina University of Mining and Technology School of Environment Tsinghua University

The development of highly active carbon material catalysts in catalytic wet air oxidation（CWAO）has attracted a great deal of attention. In this study different carbon material catalysts（multi-walled carbon nanotubes,carbon fibers and graphite） were developed to enhance the CWAO of phenol in aqueous solution. The functionalized carbon materials exhibited excellent catalytic activity in the CWAO of phenol. After 60 min reaction,the removal of phenol was nearly100% over the functionalized multi-walled carbon,while it was only 14% over the purified multi-walled carbon under the same reaction conditions. Carboxylic acid groups introduced on the surface of the functionalized carbon materials play an important role in the catalytic activity in CWAO. They can promote the production of free radicals,which act as strong oxidants in CWAO. Based on the analysis of the intermediates produced in the CWAO reactions,a new reaction pathway for the CWAO of phenol was proposed in this study. There are some differences between the proposed reaction pathway and that reported in the literature. First,maleic acid is transformed directly into malonic acid. Second,acetic acid is oxidized into an unknown intermediate,which is then oxidized into CO2 and H2O. Finally,formic acid and oxalic acid can mutually interconvert when conditions are favorable.

关键词： Catalytic wet air oxidation Phenol Carbon materials Radical Reaction pathway

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UASB-MBR组合工艺处理黄连素废水的中试

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环境科学研究 2015年第8期28卷 1295-1301页

作者：崔晓宇何绪文曾萍邱光磊宋永会中国矿业大学(北京)化学与环境工程学院北京100083 中国环境科学研究院城市水环境研究室北京100012 中国环境科学研究院环境基准与风险评估国家重点实验室北京100012 新加坡国立大学化学工程系新加坡新加坡城117585

为实现黄连素废水的规模化处理,针对黄连素废水可生化性差、有机污染物浓度高等特点,采用UASB-MBR（升流式厌氧污泥床-膜生物反应器）组合工艺,利用微生物的生化反应去除废水中的高浓度有机物和黄连素,考察在不同HRT（水力停留时间）下C... 详细信息

为实现黄连素废水的规模化处理,针对黄连素废水可生化性差、有机污染物浓度高等特点,采用UASB-MBR（升流式厌氧污泥床-膜生物反应器）组合工艺,利用微生物的生化反应去除废水中的高浓度有机物和黄连素,考察在不同HRT（水力停留时间）下CODCr和黄连素的去除效果,并采用GC-MS（气相色谱-质谱联用仪）对系统进、出水中的特征污染物进行分析.结果表明：1在UASB与MBR的HRT分别为96、66 h,84、58 h,72、50 h,60、41 h,以及进水ρ（CODCr）和ρ（黄连素）分别为2 030.0-3 660.0和19.0-400.0 mg/L的条件下,CODCr和黄连素的平均去除率均可达到90.0%以上,出水ρ（CODCr）平均值低于150.0 mg/L,ρ（黄连素）平均值低于4.0 mg/L.2UASB与MBR的HRT分别为72、50 h为最佳运行条件.3UASB可以明显降低废水中特征污染物的种类和浓度,UASB出水经MBR处理后,废水中的11种主要特征污染物均得到有效降解.

关键词：制药废水抗生素黄连素 UASB-MBR组合工艺

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Effect of Alkali Treatment on heavy Metals Adsorption Capacity of Sewage Sludge

Effect of Alkali Treatment on Heavy Metals Adsorption Capaci...

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2015 Conference on Environmental Pollution and Public health (EPPH 2015)

作者： Jianlong Hu Xiaosong Yang Linan Shao xuwen he Kunkuo Men Beijing General Research Institute of Mining & Metallurgy China University of Mining and Technology (Beijing)

Sewage sludge is the promising raw material for biosorbent preparation. In this work, we evaluated the heavy metals adsorption characteristics of alkali treated sewage sludge（ATSS） by equilibrium studies. The adsorption isotherms were fitted with Langmuir and Freundlich *** with untreated sewage sludge, the total adsorption capacity（q） of ATSS（prepared with 0.125 mol/L Na OH） for Cd, Pb, Ni, increased by 0.51, 0.70 and 0.32 mmol/g, *** the Na OH concentration for ATSS preparation increased from 0.125 mol/L to 0.25 mol/L,the q m of ATSS for Pb decreased from 1.05 mmol/g to 0.84 mmol/g. However, when the Na OH concentration increased from 0.25 mol/L to 7.5 mol/L, it showed increasing trend. According to the IR spectra data, the adsorption effect of biosorbent for heavy metals was mainly due to the complexation of ‐N‐H groups and ‐COOH groups.

关键词： Sewage Sludge Alkali Treatment heavy Metals Adsorption

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Assessing ecological sustainability of China’s three major economic rims by ecological footprint

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International Journal of Earth Sciences and Engineering 2015年第6期8卷 2817-2822页

作者： Zhang, Meng Lu, Zhaohua he, xuwen Zhang, Xiao Zhang, Hongyu Gu, Guangyi Wu, Jiaxing Beijing China Shandong Provincial Key Laboratory of Eco-Environmental Science for Yellow River Delta Binzhou University China

In recent years, the economy and society in eastern China have achieved rapid development, leading to heterogeneous composition and distribution of urban areas, which were lacking of proper urban planning guidance. The unique urbanization processes in three major economic rims (Bohai Economic Rim, Yangtze River Delta Economic Rim, and Pearl River Delta Economic Rim) resulted in severe fragmentation of habitats and environmental exacerbation and generated negative impacts to human well-being. In this research, an assessment model based on ecological footprint (EF) and ecological carrying capacity (EC) was used to detect the trend of urbanization in three main economic rims. In this model, we created four new indicators which could enrich EF and EC with economic and social dimensions, and categorized six types of ecological footprints into three main kinds of ecological footprints. In this case, the ecological sustainability of the three major economic rims is assessed and the status the social and economic development of the three major economic rims is defined. The research results could provide scientific basis and guidance for the policies made to ensure the sustainable development of society and economy in the three major economic rims. © 2015 CAFET-INNOVA TECHNICAL SOCIETY. All rights reserved.

关键词： Sustainable development

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裂缝性注水开发油藏多轮次调剖机理研究

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油气藏评价与开发 2018年第2期8卷 68-72页

作者：何涛王健余恒徐鹏刘旭文西南石油大学油气藏地质及开发工程国家重点实验室四川成都610500

为了探讨多方向见水井控水的技术对策,有必要弄清油藏多方向见水规律,认识多轮次调剖技术的调剖机理。实验通过设计制作平面裂缝—基质可视化模型,模型为一注三采,不同注采端口之间的渗透率不同,研究在裂缝—基质条件下凝胶的运移特征... 详细信息

为了探讨多方向见水井控水的技术对策,有必要弄清油藏多方向见水规律,认识多轮次调剖技术的调剖机理。实验通过设计制作平面裂缝—基质可视化模型,模型为一注三采,不同注采端口之间的渗透率不同,研究在裂缝—基质条件下凝胶的运移特征及封堵机理,后续水驱的液流改向,残余油的分布特征;通过不等渗透率并联填砂管岩心流动实验,模拟油藏的层间非均质性,对单次调剖和多级调剖操作的实验数据进行对比。实验结果发现对于裂缝性油藏,多轮次调剖可以充分发挥协同作用提高调剖效果,能使裂缝渗流通道得到有效封堵,具有良好的促进后续流体转向的作用,且调剖效果存在逐次递减现象;多轮次调剖技术较单次调剖技术能更好适用于裂缝性地质构造的调剖施工作业,起到更好的缓解层间矛盾的作用。

关键词：裂缝性油藏物理模拟可视化模型多方向见水多轮次调剖提高采收率

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Design of infrared imaging processing system for uncooled LWIR base on UAV platform

Design of infrared imaging processing system for uncooled LW...

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2017 5th International Conference on Frontiers of Manufacturing Science and Measuring Technology(FMSMT 2017)

作者： Qiang Wu Jia he xuwen Li College of Information and Communication Engineering Faculty of Information TechnologyBeijing University of Technology College of Life Science and Bioengineering Beijing University of Technology

ISBN: (纸本)9781510840232

For uncooled LWIR system function limitations and lack of real-time image processing problems. The design scheme of high performance uncooled LWIR image processing system based on UAV system platform is proposed. The solution uses TI's TMS320C6657 DSP and Altera's EP3C25F324 FPGA processor as the system computing core, makes the long wave infrared image acquisition, FPGA image preprocessing, DSP image processing into one. And designed a set of systems in line with the external needs of the communication program.

关键词： TMS320C6657 Uncooled long wave infrared Image acquisition

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Delamination detection in composite plates by synthesizing time-reversed Lamb waves and a modified damage imaging algorithm based on RAPID

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STRUCTURAL CONTROL & heALTH MONITORING 2017年第5期24卷 1-1页

作者： Liu, Zenghua Zhong, xuwen Dong, Tuocan he, Cunfu Wu, Bin Beijing Univ Technol Coll Mech Engn & Appl Elect Technol Beijing 100124 Peoples R China Beijing Univ Technol Beijing Engn Res Ctr Precis Measurement Technol & Beijing 100124 Peoples R China

Combined with the modified damage imaging algorithm based on Reconstruction Algorithm for the Probabilistic Inspection of Damage (RAPID), a baseline-free detection method of the Lamb waves based on time reversal method is developed to detect the delamination in the composite plate. Through the analysis of the focus position of time reversal signal, a new calculation method of Damage Index (DI) values is proposed. The modified damage imaging algorithm based on RAPID is integrated with two image fusion methods: full summation method and full multiplication method. According to the analysis of limitations of the modified damage imaging algorithm, the transducer array is adopted, and the problem of the uneven probability distribution caused by the uneven density of sensing network is discussed. Modified methods are proposed to eliminate the influence of the uneven probability distribution and improve the accuracy and reliability of the detection results. The parameter significantly affects the effective detection range of each sensing path in the modified damage imaging algorithm. The value of parameter was experimentally determined and reasonably applied to detect the delamination. Based on the calculation of the DI of individual sensing path and the imaging results of delamination, the identification and localization of delamination were experimentally achieved. The imaging results demonstrated the problem of the uneven probability distribution and the validity of modified methods. Copyright (c) 2016 John Wiley & Sons, Ltd.

关键词： time reversal Lamb waves composite plate delamination RAPID

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Hardware Design of Image Processing System based on EMCCD

Hardware Design of Image Processing System based on EMCCD

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2017 5th International Conference on Frontiers of Manufacturing Science and Measuring Technology(FMSMT 2017)

作者： Wenke he xuwen Li Qiang Wu College of Information and Communication Engineering Faculty of Information TechnologyBeijing University of Technology College of Life Science and Bioengineering Beijing University of Technology

ISBN: (纸本)9781510840232

Electron Multiplying Charge Coupled Device(EMCCD) is a kind of high sensitive imaging device, widely used in shimmer detection field. The paper proposed a design of image processing system for CCD201, an EMCCD with high frequency and high sensitivity of E2 V Corporation. We selected the Xilinx product ZYNQ-7000 series, based on ARM+FPGA architecture, as the processor. According to the amount of image data and the complexity of image processing, the specific model was determined as ZYNQ-7030. We designed a set of memory system out of chip and communication interface for the processor. To improve power conversion efficiency and minimize the system, a 4-channel DCDC micro-module LTM4644 was selected. LTM4644 has lower output voltage ripple than common DCDC part and can meet the power noise request of the system.

关键词： EMCCD CCD201 Image Processing System Output Ripple

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