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基于Mg牺牲电极与Ca/Mg共沉淀的赤泥复合材料制备及其磷吸附性能研究

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环境科学学报 2024年第1期44卷 252-264页

作者：陶乐瑶欧阳铸祝采莹曹露黄海明丁丽胡莹王炳乾李林隆东莞理工学院生态环境与建筑工程学院东莞523808 深圳市清蓝工程咨询有限公司深圳518000 贵州省黔西南州贞丰县第三中学贵州562200

以赤泥为载体,通过Mg牺牲电极和Ca/Mg共沉淀法将Ca/Mg负载到赤泥表面,以制备具有良好磷吸附性能的赤泥复合材料.结果表明,Mg牺牲电极改性的赤泥复合材料(RM-EMg600)的吸附性能优于Ca/Mg共沉淀改性的赤泥复合材料(RM-CM500).Langmuir模... 详细信息

以赤泥为载体,通过Mg牺牲电极和Ca/Mg共沉淀法将Ca/Mg负载到赤泥表面,以制备具有良好磷吸附性能的赤泥复合材料.结果表明,Mg牺牲电极改性的赤泥复合材料(RM-EMg600)的吸附性能优于Ca/Mg共沉淀改性的赤泥复合材料(RM-CM500).Langmuir模型拟合得到,RM-EMg600和RM-CM500对磷酸盐的最大吸附量分别为171.66 mg·g^(-1)和91.60 mg·g^(-1).赤泥复合材料对高浓度磷的吸附过程符合Freundlich模型和拟二阶动力学模型,吸附行为更符合多分子层吸附.在酸性的条件下,其对水溶液中的磷酸盐具有更好的去除效果.FT-IR、XRD、SEM和钙/镁离子的总浸出实验分析表明,赤泥复合材料对磷的吸附机制主要是化学沉淀、物理吸附、离子交换和静电作用.因此,赤泥复合材料不仅使得赤泥实现了资源化,同时也能促进磷资源的可持续发展.

关键词：赤泥(RM) Mg牺牲电极 Ca/Mg共沉淀吸附磷酸盐

Effects of Interaction between Axial and Radial Secondary Air and Reductive Intensity in Reduction Region on Combustion Characteristics and NO_(x) Emission of Coal Preheated by a Self-Preheating Burner

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Journal of Thermal Science 2024年第1期33卷 249-267页

作者： SU Kun DING Hongliang ouyang Ziqu ZHANG Jinyang zhu Shujun Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China School of Energy and Power Engineering Jiangsu UniversityZhenjiang 212013China

The study focused on the effects of the interaction between axial and radial secondary air and the reductive intensity in reduction region on combustion characteristics and NO_(x) emission in a 30 kW preheating combustion *** results revealed that the interaction and reductive intensity influenced the combustion in the down-fired combustor(DFC) and NO_(x) emission *** the temperature distribution,the interaction caused the position of the main combustion region to shift down as R_(2-12)(ratio of axial secondary air flow to radial secondary air flow) decreased or λ_(2)(total secondary air ratio) increased,and there was the interplay between both of their *** R_(3-12)(ratio of first-staged tertiary air flow to second-staged tertiary air flow)increased,the decrease in the reductive intensity also caused the above phenomenon,and the peak temperature increased in this *** the NO_(x) emission,the interaction affected the NO_(x) reduction adversely when λ_(2) or R_(2-12) was higher,and the range of this effect was larger,so that the NO_x emission increased obviously as they *** decrease in the reductive intensity caused the NO_(x) emission increased under the homogeneous reduction mechanism,while was unchanged at a high level under the heterogeneous reduction *** the combustion efficiency,the interaction improved the combustion efficiency as λ_(2) increased when R_(2-12) was lower,while reduced it as λ_(2) increased excessively when R_(2-12) was *** proper decrease in the reductive intensity caused the combustion efficiency increased obviously,while was hardly improved further when the intensity decreased *** this study,the lowest NO_(x) emission was only 41.75 mg/m^(3) without sacrificing the combustion efficiency by optimizing the interaction and reductive intensity.

关键词： self-preheating interaction of axial and radial secondary air reductive intensity combustion characteristic NO_(x)emission

Chain Extender-induced Hydrogen Bonding Organization Determines the Morphology and Properties of Thermoplastic Polycarbonate Polyurethane

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Chinese Journal of Polymer Science 2024年第1期42卷 87-96,I0009页

作者： Yi-Lang Qin Ping zhu Chen-Xi ouyang Xia Dong Fuwai Hospital Chinese Academyof Medical Sciences&Peking Union Medical College/National Center for Cardiovascular DiseasesBejing 100037China CASKey Laboratoryof Engineering Plastics CAS Research/Education Centerfor Excellence in Molecular SciencesInstitute ofChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Thermoplastic polycarbonate polyurethanes(PCUs) are multiblock copolymers that have been applied for medical devices for long time. Aliphatic diols are common chain extenders(CE) involved in the composition of the hard segments of PCU. However, limited knowledge was discovered about how the chemical structure of CE affects the hydrogen bonding organization within PCUs and their mechanical *** investigate this problem, a group of PCUs were synthesized respectively by extending the polymer chain with 1,4-butanediol(BDO),aminoethanol(MEA), ethanediol(EO) as three kinds of chain extenders. Tiny differences in the CE chemical structure results in remarkable variations in phase separation, condensed morphologies, thermal and mechanical properties, which are characterized by Fourier transform infrared spectrometer, atomic force microscopy, small-angle X-ray scattering, differential scanning calorimetry, and tensile tests. The microstructural evolution during unilateral deformation and the different mechanism induced by the different CEs was probed and unveil by in situ wide-and small-angle X-ray diffraction. Symmetry of CE can improve the organization of the hydrogen bonding. The coherence strength of the urethane/urea group also plays a key role by comparing the two PCUs with ethanediol and aminoethanol.

关键词： Thermoplastic polycarbonate polyurethane Chain extender Hydrogen bonding Mechanical properties

3D robust anisotropic diffusion filtering algorithm for sparse view neutron computed tomography 3D image reconstruction

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Nuclear Science and Techniques 2024年第3期35卷 13-29页

作者： Yang Liu Teng-Fei zhu Zhi Luo Xiao-Ping ouyang School of Nuclear Science and Engineering North China Electric Power UniversityBeijing 102206China State Key Laboratory of Nuclear Resources and Environment East China University of TechnologyNanchang 330013China State Key Laboratory of Intense Pulsed Radiation Simulation and Effect Xi’an 710024China

The most critical part of a neutron computed tomography(NCT) system is the image processing algorithm,which directly affects the quality and speed of the reconstructed *** types of noise in the system can degrade the quality of the reconstructed ***,to improve the quality of the reconstructed images of NCT systems,efficient image processing algorithms must be *** anisotropic diffusion filtering(ADF) algorithm can not only effectively suppress the noise in the projection data,but also preserve the image edge structure information by reducing the diffusion at the image ***,we propose the application of the ADF algorithm for NCT image *** compare the performance of different algorithms in NCT systems,we reconstructed images using the ordered subset simultaneous algebraic reconstruction technique(OS-SART) algorithm with different regular terms as image processing *** the iterative reconstruction,we selected two image processing algorithms,the Total Variation and split Bregman solved total variation algorithms,for comparison with the performance of the ADF ***,the filtered back-projection algorithm was used for comparison with an iterative *** reconstructing the projection data of the numerical and clock models,we compared and analyzed the effects of each algorithm applied in the NCT *** on the reconstruction results,OS-SART-ADF outperformed the other algorithms in terms of denoising,preserving the edge structure,and suppressing *** example,when the 3D Shepp–Logan was reconstructed at 25 views,the root mean square error of OS-SART-ADF was the smallest among the four iterative algorithms,at only *** universal quality index,mean structural similarity,and correlation coefficient of the reconstructed image were the largest among all algorithms,with values of 0.9877,0.9878,and 0.9887,respectively.

关键词： NCT OS-SART Sparse-view Anisotropic diffusion filtering

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鸟粪石结晶法回收电镀废水中氮磷试验研究

工业水处理 2024年第4期44卷 113-119,178页

作者：孙采蕊欧阳铸曹露胡莹黄海明王炳乾龙柯桦陶乐瑶东莞理工学院生态环境与建筑工程学院广东东莞523808 深圳市清蓝工程咨询有限公司广东深圳518000 贵州省黔西南州贞丰县第三中学贵州黔西南州562200

采用鸟粪石结晶法回收电镀废水中的氮磷,主要考察了pH、重金属离子浓度、氟离子质量浓度对电镀废水中氮磷去除的影响,结果表明pH和重金属离子浓度可显著影响鸟粪石结晶过程,低质量浓度氟离子(0~40 mg/L)对鸟粪石结构的影响可以忽略。对... 详细信息

采用鸟粪石结晶法回收电镀废水中的氮磷,主要考察了pH、重金属离子浓度、氟离子质量浓度对电镀废水中氮磷去除的影响,结果表明pH和重金属离子浓度可显著影响鸟粪石结晶过程,低质量浓度氟离子(0~40 mg/L)对鸟粪石结构的影响可以忽略。对不同条件下形成的鸟粪石进行了XRD、SEM、XPS表征,分析了重金属离子和氟离子对鸟粪石结晶过程的影响机理。重金属离子与鸟粪石可发生共沉淀,干扰鸟粪石结晶的形成。当氟离子与重金属离子共存时,氟离子会影响重金属离子在晶体上的吸附,并生成非晶相共沉淀物,改变鸟粪石的晶体形态。该研究为鸟粪石结晶法回收电镀废水中的氮磷提供理论依据。

关键词：电镀废水重金属离子氟离子鸟粪石

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Membrane-less MoO_(3-x)@TiO_(2)-bromine battery with excellent rate capability and cyclic stability

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Journal of Energy Chemistry 2024年第6期93卷 316-321,I0008页

作者： Wenjie Huang Hui Wang Bin Yuan Liuzhang ouyang Lichun Yang Min zhu School of Materials Science and Engineering Guangdong Provincial Key Laboratory of Advanced Energy Storage MaterialsSouth China University of TechnologyGuangzhou 510640GuangdongChina

Bromine has attracted significant attention as a cathode material for aqueous batteries due to its high reduction potential of 1.05 V(Br_(3)^(-)+2e~-■3Br~-),impressive theoretical specific capacity of 223 mA h g^(-1),and rapid reaction kinetics in the ***,searching for compatible anode materials to match with bromine has posed a challenge due to its highly corrosive *** this study,we developed oxygen-deficient MoO_(3) with TiO_(2) coating(referred to as MoO_(3-x)@TiO_(2))as an anode material to pair with a bromine cathode in static full *** oxygen deficiency contributes to enhanced electronic and protonic diffusion within the MoO_(3-x)lattice,while the TiO_(2) coating mitigates structural dissolution and proton trapping during *** MoO_(3-x)@TiO_(2) demonstrates fast charge storage kinetics and excellent resistance to bromine *** impressive compatibility between MoO_(3-x)@TiO_(2) and bromine enables the construction of membrane-less full batteries with exceptional rate capability and cyclic *** MoO_(3-x)@TiO_(2)-bromine battery achieves an energy density of70.8 W h kg^(-1)at a power density of 328.1 W kg^(-1),showcasing an impressive long-term cyclic life of 20,000 *** study provides valuable insights for the development of high-performance aqueous secondary batteries.

关键词： Molybdenum trioxide Oxygen deficiency TiO_(2)coating Compatibility Bromine-based battery

Feature Selection Using Tree Model and Classification Through Convolutional Neural Network for Structural Damage Detection

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Acta Mechanica Solida Sinica 2024年第3期37卷 498-518页

作者： Zihan Jin Jiqiao Zhang Qianpeng He Silang zhu Tianlong ouyang Gongfa Chen School of Civil and Transportation Engineering Guangdong University of TechnologyGuangzhou510006China Guangdong Tianxin Electric Power Engineering Testing Co. LtdGuangzhou510663China

Structural damage detection(SDD)remains highly challenging,due to the difficulty in selecting the optimal damage features from a vast amount of *** this study,a tree model-based method using decision tree and random forest was employed for feature selection of vibration response signals in *** datasets were obtained by numerical experiments and vibration experiments,*** features extracted using this method were input into a convolutional neural network to determine the location of structural *** indicated a 5%to 10%improvement in detection accuracy compared to using original datasets without feature selection,demonstrating the feasibility of this *** proposed method,based on tree model and classification,addresses the issue of extracting effective information from numerous vibration response signals in structural health monitoring.

关键词： Feature selection Structural damage detection Decision tree Random forest Convolutional neural network

儿童维矿类口服溶液中苯甲酸和山梨酸的含量探讨

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今日药学 2024年第8期34卷 583-587页

作者：詹云丽陈霞飞欧阳珠简淑娟李铭豪惠州市食品药品检验所广东惠州516001 嘉应学院药学系广东梅州514700

目的建立HPLC法测定儿童维矿类口服溶液中苯甲酸和山梨酸含量的方法。方法采用高效液相色谱法,二极管检测器,以C18色谱柱为分离柱,以甲醇-0.01 mol·L^(-1)乙酸铵溶液(用氨试液调节pH值至8.0,5∶95)为流动相,在230 nm处测定苯甲酸和... 详细信息

目的建立HPLC法测定儿童维矿类口服溶液中苯甲酸和山梨酸含量的方法。方法采用高效液相色谱法,二极管检测器,以C18色谱柱为分离柱,以甲醇-0.01 mol·L^(-1)乙酸铵溶液(用氨试液调节pH值至8.0,5∶95)为流动相,在230 nm处测定苯甲酸和山梨酸含量。流速为1.0 mL·min^(-1),进样体积为10μL。结果苯甲酸和山梨酸分别在0.996 0~79.680 3μg·mL^(-1)和1.040 9~83.269 4μg·mL^(-1)范围内与峰面积呈良好的线性关系,平均回收率分别为97.86%、99.74%(n=9)。结论本法操作快捷简便、结果可靠、重复性好,为儿童维矿类口服溶液中抑菌剂苯甲酸和山梨酸的质量控制提供了重要依据。

关键词：高效液相色谱法儿童维矿类口服溶液苯甲酸山梨酸

A Unified Model Fusing Region of Interest Detection and Super Resolution for Video Compression

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Computers, Materials & Continua 2024年第6期79卷 3955-3975页

作者： Xinkun Tang Feng ouyang Ying Xu Ligu zhu Bo Peng School of Computer and Cyber Sciences Communication University of ChinaBeijing100024China Cable Television Technology Research Institute Academy of Broadcasting ScienceBeijing100866China

High-resolution video transmission requires a substantial amount of *** this paper,we present a novel video processing methodology that innovatively integrates region of interest(ROI)identification and super-resolution *** method commences with the accurate detection of ROIs within video sequences,followed by the application of advanced super-resolution techniques to these areas,thereby preserving visual quality while economizing on data *** validate and benchmark our approach,we have curated a new gaming dataset tailored to evaluate the effectiveness of ROI-based super-resolution in practical *** proposed model architecture leverages the transformer network framework,guided by a carefully designed multi-task loss function,which facilitates concurrent learning and execution of both ROI identification and resolution enhancement *** unified deep learning model exhibits remarkable performance in achieving super-resolution on our custom *** implications of this research extend to optimizing low-bitrate video streaming *** selectively enhancing the resolution of critical regions in videos,our solution enables high-quality video delivery under constrained bandwidth *** results demonstrate a 15%reduction in transmission bandwidth compared to traditional super-resolution based compression methods,without any perceivable decline in visual *** work thus contributes to the advancement of video compression and enhancement technologies,offering an effective strategy for improving digital media delivery efficiency and user experience,especially in bandwidth-limited *** innovative integration of ROI identification and super-resolution presents promising avenues for future research and development in adaptive and intelligent video communication systems.

关键词： Super resolution region of interest detection video compression