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Tungsten 2024年第1期6卷 114-123页

作者： Jin-Hui Wang Shao-Wei Yang Fu-Bin Ma Yi-Ke Zhao shi-nuo Zhao Zheng-Yu Xiong Dong Cai Hai-Dong Shen Kai Zhu Qiu-Yu Zhang Yue-Ling Cao Tian-Shuai Wang He-Peng Zhang Research and Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518057China Xi’an Key Laboratory of Functional Organic Porous Materials School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710129China School of Power and Energy Northwestern Polytechnical UniversityXi’an 710129China Chongqing Science and Technology Innovation Center of Northwestern Polytechnical University Chongqing 401135China

Developing cost-effective electrocatalysts with high activity and stability especially at high current density is of great significance for the large-scale commercial application of electrochemical water splitting to hydrogen production but still remains ***,we report an effective confinement pyrolysis strategy to fabricate embedded ruthenium-cobalt nanoclusters supported on N-doped porous two-dimensional carbon nanosheets(RuCo@CN).Markedly,the embedded structure can effectively prevent the migration,agglomeration,and leaching of nanoparticles,thus endowing the RuCo@CN catalyst with high *** be exact,high stability with up to 650 h can be achieved at high current density(-500 and-1000 mA·cm^(-2)).Besides,the RuCo@CN catalysts also exhibit highly reactive with low overpotentials of only 11mV at-10 mA·cm^(-2).Density functional theory calculations reveal that the introduction of cobalt reduces the decomposition barrier of H_(2)O for RuCo@CN alloy,thus promoting hydrogen evolution reaction.

关键词： Hydrogen evolution reaction Confinement pyrolysis strategy Mosaic structure Stability

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砂布页轮柔性抛光表面微观形貌建模与预测

西北工业大学学报 2024年第1期42卷 62-69页

作者：陈振赵盼闫蕊史诺史恺宁史耀耀西安航空学院机械工程学院陕西西安710077 西安明德理工学院智能制造与控制技术学院陕西西安710124 西北工业大学机电学院陕西西安710072

柔性抛光技术广泛应用于航空发动机整体叶盘叶片的精密加工。系统深入研究柔性抛光过程,了解抛光加工表面微观形貌生成的内涵,成为柔性抛光加工技术的重要研究内容之一。以砂布页轮为柔性磨具,通过空间几何坐标变换建立了砂布页轮表面... 详细信息

柔性抛光技术广泛应用于航空发动机整体叶盘叶片的精密加工。系统深入研究柔性抛光过程,了解抛光加工表面微观形貌生成的内涵,成为柔性抛光加工技术的重要研究内容之一。以砂布页轮为柔性磨具,通过空间几何坐标变换建立了砂布页轮表面磨粒的空间运动学模型及磨粒-工件几何学干涉模型,并研究了砂布页轮柔性变形对工件表面磨粒运动轨迹的影响。基于磨具表面形貌模型,利用MATLAB软件进行砂布页轮柔性抛光表面微观形貌生成过程仿真,并得到不同工艺参数下工件表面三维形貌及其影响规律,抛光实验结果验证了该仿真算法的正确性和有效性。

关键词：整体叶盘叶片柔性抛光空间几何坐标转换表面微观形貌

基于虚拟仿真技术的3D导航图界面设计与实现

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玩具世界 2024年第5期 151-153页

作者：师诺王丙陕西学前师范学院信息工程学院

随着信息技术的快速发展，虚拟仿真技术在多个领域展现出巨大的应用潜力。尤其在旅游行业，虚拟仿真技术为游客提供了更加生动、逼真的旅游体验。3D导航图作为虚拟仿真技术在旅游领域的重要应用之一，其界面设计与实现对提高旅游服务质... 详细信息

随着信息技术的快速发展，虚拟仿真技术在多个领域展现出巨大的应用潜力。尤其在旅游行业，虚拟仿真技术为游客提供了更加生动、逼真的旅游体验。3D导航图作为虚拟仿真技术在旅游领域的重要应用之一，其界面设计与实现对提高旅游服务质量和游客满意度具有重要意义。文章通过分析虚拟仿真技术，深入探究了其在旅游领域的应用现状和发展趋势，并以陕西学前师范学院为例，探讨其基于虚拟仿真技术的3D导航图界面设计与实现过程。

关键词：虚拟仿真技术 3D导航图界面设计陕西学前师范学院数据获取与处理交互设计

工程材料专业复合教学模式创新设计及实践效果

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粘接 2024年第7期51卷 72-75页

作者：刘琼史诺彭寒杨鹏西安航空学院计算机学院陕西西安710077 西安航空学院机械工程学院陕西西安710077 西北农林科技大学机械与电子工程学院陕西杨凌712100

为了实现复合材料与工程专业人才培养质量的提升,构建以目标为导向、学生通过实质参与进行有效学习的格局,提出基于对分课堂与项目式教学的紧耦合关系构建复合型教学模式。以《程序设计基础》课程为对象,以“航空复合材料库存管理系统... 详细信息

为了实现复合材料与工程专业人才培养质量的提升,构建以目标为导向、学生通过实质参与进行有效学习的格局,提出基于对分课堂与项目式教学的紧耦合关系构建复合型教学模式。以《程序设计基础》课程为对象,以“航空复合材料库存管理系统”为主线构建项目式对分课堂教学模式,从实施策略和实施路径进行了理论分析与实践探索。实践效果表明:项目式对分课堂实施过程明确,有较强的可操作性,对教师与学生双方的能力都有一定的提升,符合应用型本科院校课程教学特点,是一种互利共生的教学模式。

关键词：复合材料与工程教学模式对分课堂项目式教学紧耦合

Synergistic effects of sodium hypochlorite disinfection and iron-oxidizing bacteria on early corrosion in cast iron pipes

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Frontiers of Environmental Science & Engineering 2022年第6期16卷 61-70页

作者： Weiying Li Yu Tian Jiping Chen Xinmin Wang Yu Zhou nuo shi State Key Laboratory of Pollution Control and Resource Reuse Tongji UniversityShanghai 200092China College of Environmental Science and Engineering Tongji UniversityShanghai 200092China

Corrosion in drinking water distribution systems(DWDSs)may lead to pipe failures and water quality deterioration;biocorrosion is the most common *** disinfectants are widely used in DWDSs to inhibit microorganism growth,but these also promote electrochemical corrosion to a certain *** study explored the independent and synergistic effects of chlorine and microorganisms on pipeline *** hypochlorite(NaOCl)at different concentrations(0,0.25,0.50,and 0.75 mg/L)and iron-oxidizing bacteria(IOB)were added to the reaction system,and a biofilm annular reactor(BAR)was employed to simulate operational water supply pipes and explain the composite *** degree of corrosion became severe with increasing NaOCl *** accelerated the corrosion rate at an early stage,after which the reaction system gradually *** NaOCl and IOB existed together in the BAR,both synergistic and antagonistic effects occurred during the corrosion *** AOC content increased due to the addition of NaOCl,which is conducive to bacterial ***,biofilm on cast iron coupons was greatly influenced by the disinfectant,leading to a decrease in microbial biomass over *** research is needed to provide guidelines for pipeline corrosion control.

关键词： Cast iron pipe corrosion Drinking water distribution systems Chlorine disinfection Iron-oxidizing bacteria Coupling effects

应用TRIZ冲突解决方法提升毕业设计质量探索与实践

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农业工程 2024年第7期14卷 146-150页

作者：史诺何洁杨晓龙龚德山西安航空学院机械工程学院陕西西安710077

针对毕业设计这一人才培养过程中的重要环节,提出采用TRIZ挖掘学生潜力,提高毕业设计质量的思路。建立了TRIZ与毕业设计的融合路径,在整个流程中利用冲突解决方法提出技术方案是关键步骤,以冷冲压成型工艺中的精密压力机设计为例,详细... 详细信息

针对毕业设计这一人才培养过程中的重要环节,提出采用TRIZ挖掘学生潜力,提高毕业设计质量的思路。建立了TRIZ与毕业设计的融合路径,在整个流程中利用冲突解决方法提出技术方案是关键步骤,以冷冲压成型工艺中的精密压力机设计为例,详细阐述了物理冲突的化解和技术冲突的处理过程。实践结果表明,应用冲突解决方法能够帮助学生快速找到问题突破口,与专业知识结合后可以形成理想的技术方案,TRIZ具备在毕业设计中推广的良好前景。

关键词： TRIZ 毕业设计物理冲突技术冲突精密压力机

The Finding and Phylogenetic Evolution Analysis of Bovine Piroplasms in the Rasǒn Area of North Korea

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Journal of Integrative Agriculture 2013年第10期12卷 1847-1854页

作者： JIA Li-jun ZHANG Shou-fa CAO shi-nuo QIAN Nian-chao YU Long-zheng XUAN Xue-nan Laboratory of Veterinary Microbiology Department of Veterinary MedicineYanbian University National Research Center for Protozoan Diseases Obihiro University of Agriculture and Veterinary MedicineInada-choObihiroHokkaido080-8555Japan

The objective of this study was to investigate the epidemiology of bovine Piroplasms infections in the Rasǒn area of North *** survey was carried out by light microscopic examination of Giemsa-stained blood smears,PCR,and phylogenetic evolution analysis of 128 blood samples collected from the Rasǒn *** results showed that the infection rates of the small and large parasites were about 2.5 and 1.5% on average,respectively,in all Theileria sergenti and Babesia ovatapositive blood smears by microscopic examination of blood *** detection rate of *** Giemsa-stained smears was 43.75%,while that with PCR was 67.97%.The detection rate of *** Giemsa-stained smears was 49.21%,while that with PCR was 71.88%.The sequence and phylogenetic analysis of DNA showed 98.84% homology between the 18S rRNA gene sequences of *** isolates from North Korean and that of Yanbian state from China,indicating the closest genetic relationship between both of ***,100% homology was shown between the 18S rRNA gene sequence of *** isolates from North Korea and the published sequence AY081192 of GenBank,indicating the closest genetic relationship between both of *** survey confirmed that Ras n is the endemic area of *** and *** in North Korea.

关键词： Rasǒn area of North Korea bovine Piroplasms phylogenetic trees

Heterogeneous Fenton-like discoloration of methyl orange using Fe3O4/MWCNTs as catalyst： process optimization by response surface methodology

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Frontiers of Materials Science 2016年第1期10卷 45-55页

作者： Huan-Yan XU Tian-nuo shi Hang ZHAO Li-Guo JIN Feng-Chun WANG Chun-Yan WANG Shu-Yan QI School of Materials Science and Engineering Harbin University of Science and Technology Harbin 150040 China

Fe3O4/MWCNTs nanocomposites were prepared by chemical oxidation coprecipitation method and developed as highly efficient heterogeneous Fenton-like catalyst. XRD results revealed that Fe3O4 nanoparticles deposited onto MWCNTs surface remained the inverse spinel crystal structure of cubic Fe3O4 phase. The FTIR characteristic peaks of MWCNTs weakened or disappeared due to the anchor of Fe3O4 nanoparticles and Fe-O peak at 570 cm^-1 was indicative of the formation of Fe3O4. TEM observation revealed that Fe3O4 nanoparticles were tightly anchored by MWCNTs. The Fenton-like catalytic activity of Fe3O4/MWCNTs nanocomposites for the discoloration of methyl orange （MO） was much higher than that of Fe3O4 nanoparticles. The process optimization of this heterogeneous Fenton-like system was implemented by response surface methodology （RSM）. The optimum conditions for MO discoloration were determined to be of 12.3 mmoi/L H2O2 concentration, 2.9 glL catalyst dosage, solution pH 2.7 and 39.3 min reaction time, with the maximum predicted value for MO discoloration ratio of 101.85%. The corresponding experimental value under the identical conditions was obtained as 99.86%, which was very close to the predicted one with the absolute deviation of 1.99%.

关键词： Fe3O4/MWCNTs Fenton-like catalyst azo dye response surface methodology

Heterogeneous Fenton-like discoloration of methyl orange using Fe3O4/MWCNTs as catalyst： kinetics and Fenton-like mechanism

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Frontiers of Materials Science 2018年第1期12卷 34-44页

作者： Huan-Yan XU Yuan WANG Tian-nuo shi Hang ZHAO Qu TAN Bo-Chao ZHAO xiu-Lan HE Shu-Yan QI School of Materials Science and Engineering Harbin University of Science and Technology Harbin 150040 China

The kinetics and Fenton-like mechanism are two challenging tasks for heterogeneous Fenton-like catalytic oxidation of organic pollutants. In this study, three kinetic models were used for the kinetic studies of Fe3O4/MWCNTs-H2O2 Fenton-like reaction for MO degradation. The results indicated that this reaction followed the first- order kinetic model. The relationship of reaction rate constant and temperature followed the Arrhenius equation. The activation energy and frequency factor of this system were calculated as 8.2 ***1-1 and 2.72 s-1, respectively. The quantifications of Fe ions dissolution and ,OH radicals generation confirmed that the homogeneous and hetero- geneous catalyses were involved in Fe3O4/MWCNTs＇H2O2 Fenton-like reaction. The reaction rate constant was closely related with Fe ions dissolution and ,OH radicals generation. Fe3O4/MWCNTs nanocomposites had typical ferromagnetic property and could be easily separated from solution by an external magnet after being used. Furthermore, Fe3O4/MWCNTs nanocomposites exhibited good stability and recyclability. Finally, the Fenton-like mechanisms on homogeneous and heterogeneous catalyses were described.

关键词： MWCNTs Fe3O4 NPs kinetics ,OH radicals Fenton'like mechanism

基于改进YOLOv5的飞机蒙皮表面缺陷检测方法

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国外电子测量技术 2023年第12期42卷 1-7页

作者：刘琼史诺西安航空学院计算机学院西安710077 西安航空学院机械工程学院西安710077

飞机蒙皮表面缺陷会影响飞机的气动特性,严重的甚至会影响飞行安全。针对飞机蒙皮表面缺陷检测精度不高的问题,提出一种基于改进YOLOv5的缺陷检测方法,对裂纹、腐蚀、划痕和撞击等4类缺陷进行检测。该方法首先对采集的飞机蒙皮表面缺陷... 详细信息

飞机蒙皮表面缺陷会影响飞机的气动特性,严重的甚至会影响飞行安全。针对飞机蒙皮表面缺陷检测精度不高的问题,提出一种基于改进YOLOv5的缺陷检测方法,对裂纹、腐蚀、划痕和撞击等4类缺陷进行检测。该方法首先对采集的飞机蒙皮表面缺陷数据集利用平均结构相似性(MSSIM)方法剔除相似性图像;接着,在YOLOv5的Backbone部分融入卷积块注意力模块(CBAM);最后,在Neck部分使用移动窗口转换模块(STB)替换CSP_2模块。实验结果表明,改进后的方法检测性能较好,准确率、召回率和平均精度分别达到88.29%、87.13%和92.88%,比YOLOv5s高出3.28%、3.04%和2.77%,为飞机蒙皮表面缺陷检测提供技术参考。

关键词：飞机蒙皮缺陷检测相似性注意力机制 YOLOv5