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多普勒流速剖面仪走航式湖上比测试验研究

计量与测试技术 2024年第3期51卷 76-78页

作者：滕林苹张素伟王粲中国船舶集团有限公司第七一0研究所清江创新中心

根据声学多普勒流速剖面仪(ADCP)流速测量原理,提出一种ADCP走航式湖上比测试验方法,采用高精度GPS定位计算的底跟踪速度作为流速基准,对同组相同型号ADCP测量流速的稳定性与一致性进行比较,并定量比较不同工作频率ADCP测量流速数据与GP... 详细信息

根据声学多普勒流速剖面仪(ADCP)流速测量原理,提出一种ADCP走航式湖上比测试验方法,采用高精度GPS定位计算的底跟踪速度作为流速基准,对同组相同型号ADCP测量流速的稳定性与一致性进行比较,并定量比较不同工作频率ADCP测量流速数据与GPS航速数据的差异性,分析低频ADCP湖上测流受回波信号影响较大的原因,为后续开展ADCP便捷式湖上比测试验提供参考。

关键词：多普勒流速剖面仪全球定位系统流速剖面比测

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Preparation of nanocrystalline palladium on p-Si by electroless deposition and its photo-electrochemical hydrogen evolution property

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Rare Metals 2006年第3期25卷 241-245页

作者： YAO suwei LI He zhang Weiguo WANG Hongzhi BEN Yuheng SUGIYAMA Laboratory of Surface Technology School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China

The Pd-modified p-Si electrode was prepared by means of electroless deposition. The average diameter of Pd nanoparticles was about 80 nm from SEM observations. XRD results showed that the structure of Pd coatings was nanocrystalline. The catalyzing properties of the Pd-modified p-Si electrode for hydrogen evolution under illumination and in dark were studied with the constant current polarization method. The polarization potential for hydrogen evolution reac- tion （HER） of the Pd/p-Si electrode under illumination was 250 mV lower than that in dark, and was 450 mV lower than that of p-Si in dark at the current density of 2.5 mA·cm^-2. The results of electrochemistry impedance spectra （EIS） showed that electrochemistry HER resistance of the modified electrode under illumination decreased from 593.12 to 442.20 Ω·cm^2, and the HER rate increased evidently.

关键词： electrochemistry Pd-modified p-Si electrode electroless hydrogen evolution reaction

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Enhanced photocatalytic activity in Ag-nanoparticle-dispersed BaTiO3 composite thin films: Role of charge transfer

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Journal of Advanced Ceramics 2017年第1期6卷 1-10页

作者： suwei zhang Bo-ping zhang Shun LI Zhicheng HUANG Chushu YANG Huiying WANG Beijing Municipal Key Laboratory of New Energy Materials and Technologies School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

Optical absorption and photocatalytic activity can be enhanced by surface plasmon resonance (SPR) effect,but the charge transfer (CT) mechanism between the dispersed noble metal nanoparticles (NPs) and the semiconductor matrix has been ***,we adduce a direct and strong evidence in Ag-nanoparticle-dispersed BaTiO3 (Ag/BTO) composite films through X-ray photoelectron and photoluminescence spectra which reveals the CT from BTO trapped by Ag NPs under UV light and from Ag NPs to BTO under visible *** to the broadened optical absorption and efficient CT from Ag NPs to BTO,the Ag25/BTO film manifests the optimal photocatalytic activity under the irradiation of visible light rather than UV-Vis *** work provides a helpful insight to design highly efficient plasmonic photocatalyst through considering the synergetic effect of the CT between metal and semiconductor on the enhanced photocatalytic activity.

关键词： charge transfer (CT) composite films photocatalytic activity surface plasmon resonance (SPR)

Template Synthesis and Characterization of Cu2O/TiO2 Coaxial Nanocable for Photocatalysis

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Chemical Research in Chinese Universities 2015年第5期31卷 846-850页

作者： WANG Hongzhi LIU Ning LU Jing YAO suwei JIANG Shisheng zhang Weiguo Department of Applied Chemistry School of Chemical Engineering and Technology Tianjin University Tianjin 300072 P. R. China

Coaxial nanocable consisted of p-type Cu2O nanowires and n-type TiO2 nanotubes arrays was prepared in the porous anodic aluminum oxide（AAO） template via the sol-gel method and subsequent electrodeposition method. X-ray diffraction analysis identified an anatase structure of the TiO2 nanotubes and cubic structure of the Cu2O nanowires. The obtained samples were also characterized by scanning electron microscopy（SEM）, transmission electron microscopy（TEM） and energy dispersive X-ray spectroscopy（EDS）. The diffrence of open circuit potential of the coaxial nanocable electrode was larger than that of the TiO2 nanotubes electrode under ultraviolet illumination, which means doping with Cu2O could improve the photovoltage effectively. Meanwhile, nanocable arrays exhibited a high activity for photodegrading Rhodamine B under Xe lamp irradiation and the photocatalysis degradation efficiency was up to 98.69% after degradation for 7 h. The enhanced photocatalytic activity could be attributed to the high migration efficiency of photoinduced electrons, which may suppress the charge recombination effectively.

关键词： TiO2 Cu2O Coaxial nanocable Heterojunction Photocatalysis

Phase transition and piezoelectric property of (Ag,K)NbO_(3) ceramics

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Journal of Materiomics 2022年第4期8卷 863-872页

作者： Lin Chen Mingyuan Zhao Jing Wang suwei zhang Fuhua Sun Lei Zhao Key Laboratory of High-precision Computation and Application of Quantum Field Theory of Hebei Province College Physics Science and TechnologyHebei UniversityBaoding071002China Key Laboratory of Mechanics and Control of Mechanical Structures College of Aerospace EngineeringNanjing University of Aeronautics and AstronauticsNanjing210016China Center for Advanced Measurement Science National Institute of MetrologyBeijing100029China Institute for Advanced Materials Hubei Normal UniversityHuangshi435002China

AgNbO_(3) is an antiferroelectric (AFE) material with double hysteresis loop. Both the antiferroelectricityand ferroelectricity can be enhanced by doping. Herein, the ferroelectricity of AgNbO_(3) ceramics wasenhanced via K-doping and the phase diagram of the (Ag_(1-x)K_(x))NbO_(3) ceramics was upgraded. In details,(Ag_(1-x)K_(x))NbO_(3) ceramics are ferrielectric (FIE) M1 phase as x=5.00-5.50 mol% and ferroelectric (FE) Ophase as x=5.75-6.00 mol% before poling, and FE O phase as x=5.00-6.00 mol% after poling at roomtemperature. With increasing temperature, (Ag_(1-x)K_(x))NbO_(3) ceramics show the phase evolutions from FIEM1, AFE M2 to paraelectric (PE) T phase at x=5.00-5.50 mol% and from FE O, FE T to PE T phase at x=5.75-6.00 mol% before poling, and from FE O, FE T to PE T phase at x=5.00-6.00 mol% after *** d33 values of 180 pC/N and 285 pC/N are obtained at the FE O-FE T and FE T-PE T phase *** work sheds light on a novel and promising lead-free piezoelectric system.

关键词： (Ag_(1-x)K_(x))NbO_(3)ceramics Phase diagram Piezoelectric property

AgNbO_(3) antiferroelectric film with high energy storage performance

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Journal of Materiomics 2021年第6期7卷 1294-1300页

作者： Yanle zhang Xiaobo Li Jianmin Song suwei zhang Jing Wang Xiuhong Dai Baoting Liu Guoyi Dong Lei Zhao Hebei Key Lab of Optic-Electronic Information and Materials College of Physics Science and TechnologyHebei UniversityBaoding071002China College of Science Hebei Agricultural UniversityBaoding071001China Center for Advanced Measurement Science National Institute of MetrologyBeijing100029China State Key Laboratory of Mechanics and Control of Mechanical Structures College of Aerospace EngineeringNanjing University of Aeronautics and AstronauticsNanjing210016China

Antiferroelectric materials with double hysteresis loops are attractive for energy storage applications,which are becoming increasingly important for power electronics *** them,AgNbO_(3) based lead-free ceramics have attracted intensive interest as one of promising environmental-friendly ***,most of the AgNbO_(3) based ceramics suffers from low dielectric breakdown strength(Eb).The limitation of low Eb is broken to some extent in this ***,AgNbO_(3) epitaxial films were fabricated by pulsed laser deposition,which possess high Eb of 624 kV/***(001)AgNbO_(3) epitaxial film reveals typical antiferroelectric hysteresis loops when the applied electric fields are over 300 kV/cm.A recoverable energy density of 5.8 J/cm^(3) and an energy efficiency of 55.8%are obtained at 600 kV/cm,which demonstrates the great promise of the AgNbO_(3) film for energy storage applications.

关键词： AgNbO_(3) Antiferroelectric Film Energy storage performance

基于情感分类与主题挖掘的MOOC课程评论研究

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考试研究 2024年第1期20卷 86-100页

作者：余亚烽刘兴红陶胜阳王瑰霞张苏薇湖北师范大学计算机与信息工程学院湖北黄石435002 大悟县中等职业技术学校信息技术部湖北孝感432800

在线精品课程作为MOOC中的高质量教育资源,有效促进了教育公平和均衡发展。但在保持快速增长的态势时,仍存在质量参差不齐的困境。为促进教师深度反思,支持教学问题的诊断与改进,提升课程质量,构建在线精品课程评论情感分类与主题挖掘... 详细信息

在线精品课程作为MOOC中的高质量教育资源,有效促进了教育公平和均衡发展。但在保持快速增长的态势时,仍存在质量参差不齐的困境。为促进教师深度反思,支持教学问题的诊断与改进,提升课程质量,构建在线精品课程评论情感分类与主题挖掘研究模型。首先,采用网络爬虫技术采集MOOC平台中25门“教育技术学”专业在线精品课程评论数据,并进行数据预处理和情感分类;其次,对负性课程评论进行词云分析、社会网络分析和主题挖掘。结果表明:教师教学能力、学习资源质量、课程内容设计、互动和反馈机制、课程考核评价是导致学生差评、影响课程学习体验和学习质量的主要因素。据此,提出促进在线教育中教师教学能力专业化提升、开发优质在线精品课程学习资源、打造实用生动的在线精品课程内容、优化互动和反馈机制、优化在线精品课程考核评价等课程优化建议。

关键词：情感分类主题挖掘 MOOC 课程评论课程质量

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Visible light cross-linking and bioactive peptides loaded integrated hydrogel with sequential release to accelerate wound healing complicated by bacterial infection

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Nano Research 2024年第3期17卷 1737-1747页

作者： Guiyan Wang Ning Yuan Jun zhang Man Qin suwei Dong Yuguang Wang Department of Pediatric Dentistry Peking University School and Hospital of StomatologyBeijing 100081China State Key Laboratory of Natural and Biomimetic Drugs Chemical Biology Centerand School of Pharmaceutical SciencesPeking UniversityBeijing 100191China Department of Prosthodontics Peking University School and Hospital of StomatologyBeijing 100081China

The effective management of bacterial infections that are resistant to multiple drugs remains a substantial clinical *** eradication of drug-resistant bacteria and subsequent promotion of angiogenesis are imperative for the regeneration of the infected ***,a novel and facile peptide containing injectable hydrogel with sustained antibacterial and angiogenic capabilities is *** antibacterial peptide that consists of 11 residues(CM11,WKLFKKILKVL)is loaded onto acrylate-modified gelatin through charge interactions.A vascular endothelial growth factor mimetic peptide KLT(KLTWQELYQLKYKGI)with a GCG(Gly-Cys-Gly)modification at the N-terminal is covalently coupled through a visible light-induced thiol-ene *** this reaction,the acrylate gelatin undergoes cross-linkage within *** on the physical/chemical double crosslinking strategy,the bioactive peptides achieve sustained and sequential *** results show that the hydrogel significantly inhibits methicillin-resistant Staphylococcus aureus(MRSA)growth through the rapid release of CM11 peptides at early stage;it forms obvious growth inhibition zones against pathogenic bacterial ***,cell counting kit-8 assay and scratch test confirm that the CM11/KLT-functionalized hydrogels promote cell proliferation and migration through the later release of KLT *** a mouse skin wound infected with self-luminous MRSA,the CM11/KLT-functionalized hydrogels enhance wound healing,with rapidly bacterial infection reduction,lower expression of inflammatory factors,and neovascularization *** results suggest that the rationally designed,sustained and sequential release CM11/KLT-functionalized hydrogels have huge potential in promoting the healing of multi-drug resistant bacterial infected wounds.

关键词： antimicrobial peptide vascular endothelial growth factor(VEGF)mimetic peptide sequential release visible-light crosslinking hydrogel wound therapy

基于Python和S-T的课堂教学分析——以高中信息技术课堂为例

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现代信息科技 2024年第9期8卷 173-178页

作者：王瑰霞刘兴红张苏薇李逸雪覃守垣湖北师范大学计算机与信息工程学院湖北黄石435002

随着科技的飞速发展和教育信息化的全面普及,如何对高中信息技术课堂教学过程进行有效研究和分析,让其进一步完善是一个很重要的问题。文章选取高中信息技术两门相同理论课和两门相同实操课进行“同课异构”分析,通过反复观看课堂教学视... 详细信息

随着科技的飞速发展和教育信息化的全面普及,如何对高中信息技术课堂教学过程进行有效研究和分析,让其进一步完善是一个很重要的问题。文章选取高中信息技术两门相同理论课和两门相同实操课进行“同课异构”分析,通过反复观看课堂教学视频,并运用Python和S-T分析法分析其课堂教学模式以及教学中存在的问题,最后针对理论性课程和操作类课程分别给出相关改进建议,为信息技术教师提升课堂教学效率和自我发展提供参考和建议,促进信息化教育课堂的发展。

关键词：高中信息技术 S-T分析法 Python 课堂教学分析

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