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High-precision simulation and experimental verification of residual stress and surface topography of cylindrical surface shot peening

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Chinese Journal of Aeronautics 2024年第9期37卷 535-559页

作者： Jiuyue ZHAO Jinyuan TANG huaming liu Huiyun ZHANG Xin LI Han DING State Key Laboratory of Precision Manufacturing for Extreme Service Performance Central South UniversityChangsha 410083China College of Mechanical and Electrical Engineering Central South UniversityChangsha 410083China

Shot peening is commonly employed for surface deformation strengthening of cylindrical surface ***,it is critical to understand the effects of shot peening on residual stress and surface *** to flat surface,cylindrical surface shot peening has two significant features:(i)the curvature of the cylindrical surface and the scattering of the shot stream cause dis-tributed impact velocities;(i)the rotation of the part results in a periodic variation of the impact velocity ***,it is a challenge to quickly and accurately predict the shot peening residual stress and surface topography of cylindrical *** paper developed a high-precision model which considers the more realistic shot peening ***,a kinematic analysis model was developed to simulate the relative movement of numerous shots and cylindrical ***,the spatial distribution and time-varying impact information was ***,the impact information was used for finite element modeling to predict residual stress and surface *** proposed kinematic analysis method was validated by comparison with the dis-crete element ***,9310 high strength steel rollers shot peening test verified the effectiveness of the model in predicting the residual stress and surface *** addition,the effects of air pressure and attack angle on the residual stress and surface topography were *** work could provide a functional package for efficient prediction of the surface integrity and guide industrial application in cylindrical surface shot peening.

关键词： Shot peening Cylindrical surface 9310 high strength steel High-precision modeling Residual stress Surface topography

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工程教育认证下汽车制造工艺学课程达成评价

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汽车实用技术 2024年第3期49卷 133-136页

作者：刘华明武汉科技大学汽车与交通工程学院湖北武汉430081

课程达成评价是工程教育认证的重要内容之一。文章以车辆工程专业核心课程汽车制造工艺学为例,详细阐述了专业课程的考核过程和达成评价方法。根据工程教育认证标准的12条毕业要求制定了课程目标,介绍了课程的考核方式和达成度计算方法... 详细信息

课程达成评价是工程教育认证的重要内容之一。文章以车辆工程专业核心课程汽车制造工艺学为例,详细阐述了专业课程的考核过程和达成评价方法。根据工程教育认证标准的12条毕业要求制定了课程目标,介绍了课程的考核方式和达成度计算方法,采用定量分析法计算了各课程目标的达成度,并分析了课程达成情况,提出了持续改进建议。文章的研究结果可为工科类专业的课程达成评价提供一定的参考。

关键词：工程教育认证汽车制造工艺学课程达成评价持续改进

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基于优化感受野策略的图像修复方法

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计算机应用研究 2024年第6期41卷 1893-1900页

作者：刘恩泽刘华明王秀友毕学慧阜阳师范大学计算机与信息工程学院安徽阜阳236000

当前流行的基于深度神经网络的图像修复方法,通常使用大感受野的特征提取器,在修复局部图案和纹理时,会产生伪影或扭曲的纹理,从而无法恢复图像的整体语义和视觉结构。为了解决这个问题,提出了一种基于优化感受野策略的图像修复方法(opt... 详细信息

当前流行的基于深度神经网络的图像修复方法,通常使用大感受野的特征提取器,在修复局部图案和纹理时,会产生伪影或扭曲的纹理,从而无法恢复图像的整体语义和视觉结构。为了解决这个问题,提出了一种基于优化感受野策略的图像修复方法(optimized receptive field,ORFNet),将粗糙修复与精细修复相结合。首先,使用具有大感受野的生成对抗网络获得初始的粗略修复结果;然后,使用具有小感受野的模型来细化局部纹理细节;最后,使用基于注意力机制的编码器-解码器网络进行全局精炼修复。在CelebA、Paris StreetView和Places2数据集上进行验证,结果表明,ORFNet与现有具有代表性的修复方法进行对比,PSNR和SSIM分别平均提升1.98 dB和2.49%,LPIPS平均下降2.4%。实验证明,所提图像修复方法在不同感受野的引导下,在修复指标上表现更好,在视觉上也更加真实自然,验证了该修复方法的有效性。

关键词：自编码网络语义一致感受野注意力粗修复和细修复

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Illustrating the multi-stakeholder perceptions of environmental pollution based on big data:Lessons from China

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Regional Sustainability 2022年第1期3卷 12-26页

作者： liu Haimeng liu huaming CHENG Yi Institute of Geographic Sciences and Natural Resources Research Chinese Academy of SciencesBeijing100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing100049China Department of Business Administration University of GranadaGranada18011Spain

The relationship between stakeholders and the environment influences sustainable development and human *** illustrate the multi-stakeholder perceptions of environmental pollution in China,we interpreted a feedback loop in the perception-behavior-environment nexus from the perspective of the coupled human-environment system,measured the differences of environmental perceptions among five stakeholders(the public,government,media,companies,and scientists)and regions(including 31 provinces,autonomous regions,and municipalities in China,with exceptions of Taiwan of China,Hong Kong of China,and Macao of China due to a lack of data)using big data,and made a comparison between the perceptions and the actual pollution *** results showed that the five stakeholders exhibited similar perceptions of environmental pollution at the national scale,with air pollution being of most concern,followed by water pollution and soil *** were significant spatial differences in environmental *** stakeholders in the developed regions in eastern China paid relatively high attention to environmental issues,while those in the northwestern regions paid much less *** existed a mutual influence and interaction among the different *** attention should be paid to air pollution in Xinjiang Uygur Autonomous Region and Ningxia Hui Autonomous Region,water pollution in Hainan Province,Inner Mongolia Autonomous Region,Heilongjiang Province,and Jilin Province,and soil pollution in Hainan Province,Fujian Province,and Jilin *** paper provides a research paradigm on multi-stakeholder environmental perceptions based on big data,and the results provide a background reference for regional environmental governance.

关键词： Environmental quality Environmental perception Regional sustainable development Inter-organizational coupling Human-environment system Air pollution Water pollution Soil pollution Big data

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高炉两铁口出铁不均的原因分析及应对措施

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甘肃冶金 2024年第2期46卷 57-60页

作者：吴加伟周晓东赵强刘化明青岛特殊钢铁有限公司炼铁厂山东青岛266000

针对高炉在出铁作业过程中阶段性出现的不均匀、不稳定现象,从收集到的铁量差、出铁量、出渣量、炉温、物理热、出铁时间、下渣时间等参数入手分析原因,并制定和实施了对应的治理措施,取得良好的效果。

关键词：高炉出铁不均铁量差出铁时间出铁量

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基于标准汤剂的鹅不食草HPLC特征图谱相关性研究

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国际中医中药杂志 2024年第7期46卷 905-912页

作者：刘华明郑晓英张辉谭沛刘玉华华润三九医药股份有限公司深圳518110 华润三九现代中药制药有限公司惠州516000

目的建立基于标准汤剂的鹅不食草HPLC特征图谱检测方法, 对其药材、饮片、标准汤剂、中间体、配方颗粒的相关性进行评价, 为鹅不食草配方颗粒质量标准的制定提供依据。方法采用HPLC法建立鹅不食草药材、饮片、标准汤剂、中间体、配方颗... 详细信息

目的建立基于标准汤剂的鹅不食草HPLC特征图谱检测方法, 对其药材、饮片、标准汤剂、中间体、配方颗粒的相关性进行评价, 为鹅不食草配方颗粒质量标准的制定提供依据。方法采用HPLC法建立鹅不食草药材、饮片、标准汤剂、中间体、配方颗粒特征图谱, 采用中药指纹图谱相似度评价系统进行评价, 确定共有峰, 并通过聚类分析、主成分分析和正交偏最小二乘判别分析(OPLS-DA)确定药材、饮片、标准汤剂、中间体、配方颗粒的相关性, 筛选影响差异的标志性成分。结果鹅不食草药材、饮片、标准汤剂、中间体、配方颗粒特征图谱与各自的对照图谱相似度较高;药材、饮片、标准汤剂、中间体、配方颗粒中均呈现14个特征峰, 指认出11个特征峰;聚类分析和主成分分析结果一致, 标准汤剂与中间体、配方颗粒更为接近;OPLS-DA筛选得到6个VIP值大于1的差异性成分。结论该方法稳定、准确, 专属性强, 通过对药材、饮片、标准汤剂、中间体、配方颗粒特征图谱相关性的研究, 可为鹅不食草配方颗粒质量标准研究提供依据。

关键词：鹅不食草标准汤剂特征图谱相关性配方颗粒

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液力惯容器螺旋管对流换热数值模拟

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农业装备与车辆工程 2024年第2期62卷 112-116页

作者：刘华明朱师怡王石磊李小波武汉科技大学汽车与交通工程学院湖北武汉430081

采用数值模拟研究了液力惯容器螺旋管的对流换热特性。通过建立液力惯容器螺旋管的流动换热数值模型,仿真得到管内的流体流速及温度分布,采用努塞尔数描述螺旋管的对流换热能力,分析了不同参数对螺旋管流动换热特性的影响。结果表明:螺... 详细信息

采用数值模拟研究了液力惯容器螺旋管的对流换热特性。通过建立液力惯容器螺旋管的流动换热数值模型,仿真得到管内的流体流速及温度分布,采用努塞尔数描述螺旋管的对流换热能力,分析了不同参数对螺旋管流动换热特性的影响。结果表明:螺旋管的速度场和温度场均呈C型分布,表明产生了二次流现象;随着入口和壁面温度增加,努塞尔数先降低后增加;随着雷诺数、相对粗糙度、螺旋直径的增加及螺旋管内直径和螺距的减小,努塞尔数增加,对流传热能力加强。研究结论为螺旋管式液力惯容器的热力学设计提供了理论依据。

关键词：液力惯容器数值模拟换热特性努塞尔数

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Differential response of radial growth and δ^(13)C in Qinghai spruce(Picea crassifolia) to climate change on the southern and northern slopes of the Qilian Mountains in Northwest China

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Journal of Forestry Research 2024年第3期35卷 205-218页

作者： Li Qin huaming Shang Weiping liu Yuting Fan Kexiang liu Tongwen Zhang Ruibo Zhang Key Laboratory of Tree-Ring Physical and Chemical Research(CMA)/Xinjiang Key Laboratory of Tree-Ring Ecology Institute of Desert MeteorologyChina Meteorological AdministrationUrimqi 830002People's Republicof China Xinjiang Meteorological Information Center Urimqi 830002People's Republic of China

Tree radial growth can have significantly differ-ent responses to climate change depending on the *** elucidate the effects of climate on radial growth and stable carbon isotope(δ^(13)C)fractionation of Qing-hai spruce(Picea crassifolia),a widely distributed native conifer in northwestern China in different environments,we developed chronologies for tree-ring widths and δ^(13)C in trees on the southern and northern slopes of the Qilian Mountains,and analysed the relationship between these tree-ring variables and major climatic ***-ring widths were strongly influenced by climatic factors early in the growing season,and the radial growth in trees on the northern slopes was more sensitive to climate than in trees on the ***-ring δ^(13)C was more sensitive to climate than radial growth.δ^(13)C fractionation was mainly influenced by summer temperature and precipitation early in the growing *** conductance more strongly limited stable carbon isotope fractionation in tree rings than photosynthetic rate *** response between tree rings and climate in mountains gradually weakened as climate *** in radial growth and stable carbon isotope fractionation of *** in response to climate in the Qilian Mountains may be further complicated by continued climate change.

关键词： Tree rings Qinghai spruce(Picea crassifolia Kom.) Stable carbon isotope(δ^(13)C) Qilian Mountains:Climate change

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Classification of Sailboat Tell Tail Based on Deep Learning

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Journal of Ocean University of China 2024年第3期23卷 710-720页

作者： CHANG Xiaofeng YU Jintao GAO Ying DING Hongchen liu Yulong YU huaming Department of Physical Education Ocean University of ChinaQingdao 266100China College of Big Data Qingdao University of Science and TechnologyQingdao 266061China College of Oceanic and Atmospheric Sciences Ocean University of ChinaQingdao 266100China

The tell tail is usually placed on the triangular sail to display the running state of the air flow on the sail *** is of great significance to make accurate judgement on the drift of the tell tail of the sailboat during sailing for the best sailing *** it is difficult for sailors to keep an eye for a long time on the tell sail for accurate judging its changes,affected by strong sunlight and visual *** this case,we adopt computer vision technology in hope of helping the sailors judge the changes of the tell tail in ease with *** paper proposes for the first time a method to classify sailboat tell tails based on deep learning and an expert guidance system,supported by a sailboat tell tail classification data set on the expert guidance system of interpreting the tell tails states in different sea wind conditions,including the feature extraction *** the expression capabilities that vary with the computational features in different visual tasks,the paper focuses on five tell tail computing features,which are recoded by an automatic encoder and classified by a SVM *** experimental samples were randomly divided into five groups,and four groups were selected from each group as the training set to train the *** remaining one group was used as the test set for *** highest resolution value of the ResNet network was 80.26%.To achieve better operational results on the basis of deep computing features obtained through the ResNet network in the *** method can be used to assist the sailors in making better judgement about the tell tail changes during sailing.

关键词： tell tail sailboat classification deep learning

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新能源与火电联合技术研究

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能源与环保 2024年第2期46卷 184-190,197页

作者：丁建博周广利刘志宝沙少飞程政白力刘华明程龙华能(天津)煤气化发电有限公司天津300452 华能通辽风力发电有限公司内蒙古通辽028000 华能招标有限公司北京102209

随着“双碳”目标的提出,新能源技术不断发展,新能源发电占比稳步提升,但是新能源发电的不稳定性必然会导致新能源发电存在电能质量低和可控性差的问题。结合国内当前资源状态和发电模式结构来看,仍以火电为主,新能源为辅。由于煤炭和... 详细信息

随着“双碳”目标的提出,新能源技术不断发展,新能源发电占比稳步提升,但是新能源发电的不稳定性必然会导致新能源发电存在电能质量低和可控性差的问题。结合国内当前资源状态和发电模式结构来看,仍以火电为主,新能源为辅。由于煤炭和天然气资源供需关系、环保要求,也严重限制火电的发展,新能源与火电联合技术将成为热门研究趋势,新能源与火电联合技术发展可以实现能源结构优化互补,推进新能源火电联营运行模式。针对新能技术与火电中燃气机组、燃煤机组、整体煤气化联合循环发电机组(Integrated Gasification Combined Cycle,IGCC)构型分析。将各种火电特性和新能源优势整合分析研究,可以有效解决新能源储能问题、更高效实现火电的富氧燃烧和CO 2捕集。

关键词：新能源火电 IGCC 富氧燃烧氢储能燃气联合循环

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