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报废更新补贴政策视角下农业机械化转型研究

农机化研究 2024年第1期46卷 1-8页

作者：刘恩妤杨印生韦鑫吉林大学生物与农业工程学院长春130022

随着农机报废更新补贴政策的全面推广实施,我国农业机械化将逐步向绿色化、智能化及高质高效转型升级。为此,通过对我国农业机械化发展历程的梳理,分析农业机械化转型升级的必要性与影响因素,解析农机报废更新补贴政策促进农业机械化转... 详细信息

随着农机报废更新补贴政策的全面推广实施,我国农业机械化将逐步向绿色化、智能化及高质高效转型升级。为此,通过对我国农业机械化发展历程的梳理,分析农业机械化转型升级的必要性与影响因素,解析农机报废更新补贴政策促进农业机械化转型升级的机制。研究认为:我国农业机械化正处于转型阶段,农机装备结构需进一步调整,农机作业需进一步全程全面化,农机社会化服务体系还需进一步完善;地形地貌、技术、农业劳动力的转移、农民受教育程度、农机社会化服务、经济水平及农机补贴政策会影响农业机械化转型升级;农机报废更新补贴政策通过报废补贴和更新补贴两方面促进农业机械化转型升级。基于以上结论,提出了促进农业机械化转型升级的对策建议。

关键词：农机报废更新补贴政策农业机械化转型升级机制对策

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氧化物弥散强化镍基高温合金制备与性能研究

精密成形工程 2024年第10期16卷 50-60页

作者：刘恩宇马庆爽白静宫明龙李会军高秋志东北大学秦皇岛分校资源与材料学院河北秦皇岛066004 东北大学材料科学与工程学院沈阳110819 伍伦贡大学工程与信息科学学部伍伦贡NSW2522澳大利亚

目的以第三代镍基高温合金粉末为基础,制备氧化物弥散强化(Oxide Dispersion Strengthened,ODS)合金,探讨不同球磨时间与过程控制剂(Process Control Agent,PCA)添加量对机械合金化(Mechanically Alloying,MA)后粉末形貌与尺寸的影响,... 详细信息

目的以第三代镍基高温合金粉末为基础,制备氧化物弥散强化(Oxide Dispersion Strengthened,ODS)合金,探讨不同球磨时间与过程控制剂(Process Control Agent,PCA)添加量对机械合金化(Mechanically Alloying,MA)后粉末形貌与尺寸的影响,以及放电等离子烧结(Spark Plasma Sintering,SPS)温度对合金压缩性能和硬度的影响。方法利用扫描电子显微镜(Scanning Electron Microscope,SEM)表征机械合金化后粉末形貌,并统计粉末平均尺寸与晶粒尺寸,结合MHV-50Z/V2.0型数显维氏硬度计与AGS-X-100 kN电子万能试验机等方法对力学性能进行分析。结果PCA的加入能够有效细化粉末,但随着PCA添加量的增加,MA粉末逐渐由球状变为层片状。随着球磨时间的延长,部分粉末逐渐由球状变为扁平球状。另外,粉末的平均尺寸和晶粒尺寸均随球磨时间的延长而先减小后趋于稳定。SPS烧结温度为1050℃的合金性能最优,其极限压缩强度达到1735.61 MPa,维氏硬度高达488.94HV。结论最佳的制备工艺组合为球磨时间36 h,PCA添加量(质量分数)10%,SPS烧结温度1050℃,在此工艺参数组合下可制备出性能较优异的ODS镍基高温合金。

关键词：镍基高温合金氧化物弥散强化机械合金化放电等离子烧结压缩性能

Tailoring the Microstructure and Mechanical Property of Mg-Zn Matrix Composite via the Addition of Al Element

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Acta Metallurgica Sinica(English Letters) 2024年第3期37卷 438-452页

作者： Chong Wang Fuyuan liu Xuejian Wang enyu Guo Zelong Du Kunkun Deng Zongning Chen Huijun Kang Guohao Du Tongmin Wang Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province) School of Materials Science and EngineeringDalian University of TechnologyDalian 116024China School of Mechanical Engineering Guizhou UniversityGuiyang 550025China Ningbo Institute of Dalian University of Technology Ningbo 315000China Shanxi Key Laboratory of Advanced Magnesium-Based Materials College of Materials Science and EngineeringTaiyuan University of TechnologyTaiyuan 030024China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research Institute CASShanghai 201204China

The semi-solid stir casting method is adopted to prepare 10 wt%SiC_(p)/Mg-6Zn-0.5Ca-xAl(x=0,1,3 and 5 wt%)composites,and the microstructure evolution and mechanical property of composites with various Al content are *** results show that the addition of 3 wt%Al improves the distribution of SiC_(p),whereas the SiC_(p) cluster occurs again with Al content greater than 3%.An abnormal phenomenon of twinning is observed in the cast composites in this *** SiC_(p)/Mg-6Zn-0.5Ca composite possesses the highest twin content of~23%,for which tension twins(TTW)and compression twins(CTW)account for~19%and~3%,*** CTW is only observed in ZXA600 *** addition of Al has an inhibiting effect for the generation and growth of *** content of twin decreases firstly and then increases with increase of Al *** lowest twin content is obtained as Al increases to 3 wt%.It is found the existence of twin is detrimental to the mechanical property of ***-cast SiC_(p)/Mg-6Zn-0.5Ca-3Al composite with the lowest twin content exhibits the optimal mechanical property of yield strength,ultimate tensile strength and elongation for 100 MPa,188 MPa and 4.4%,*** outstanding mechanical property is attributed to the uniform distribution of SiC_(p),the low twin content and the well-distributed fine second phases.

关键词： Mg matrix composite Synchrotron tomography Twinning Liquid melt processing Mechanical property

UNIFORM COLOR SPACE AND NUMERAL SYSTEM

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UNIFORM COLOR SPACE AND NUMERAL SYSTEM

Improvement strategy on thermophysical properties of A_(2)B_(2)O_(7)-type rare earth zirconates for thermal barrier coatings applications:A review

26th Session of the CIE

作者： liu enyu TV Department Communication University of China

＜正＞Referring to the ordering laws of color muster and numeral relationship,this article introduces the theoretical basis of tricolor dye system,the composition of numeral system and the expression of uniform color space in types,features and relations of *** relationship with scientific research,life beautification and artistic creations focuses on the relationship among sources of light,object and colors in terms of physics,visual adaptability in terms of physiology and the color combinations of landscape and image content in terms of *** the perfection of this color system is limited by the not-good-enough absorbing characteristics of yellow,fuchsine and cyan dyes,it will enable copied graphics to achieve the harmony between numeral system and psychological judgment and meet the needs of color applications.

关键词： color model tricolor dye system uniform color space.

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International Journal of Minerals,Metallurgy and Materials 2024年第5期31卷 1147-1165页

作者： Zijian Peng Yuhao Wang Shuqi Wang Junteng Yao Qingyuan Zhao enyu Xie Guoliang Chen Zhigang Wang Zhanguo liu Yaming Wang Jiahu Ouyang School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China School of Materials and Metallurgical Engineering Inner Mongolia University of Science&TechnologyBaotou 014010China

The A_(2)B_(2)O_(7)-type rare earth zirconate compounds have been considered as promising candidates for thermal barrier coating(TBC) materials because of their low sintering rate,improved phase stability,and reduced thermal conductivity in contrast with the currently used yttria-partially stabilized zirconia (YSZ) in high operating temperature *** review summarizes the recent progress on rare earth zirconates for TBCs that insulate high-temperature gas from hot-section components in gas *** on the first principles,molecular dynamics,and new data-driven calculation approaches,doping and high-entropy strategies have now been adopted in advanced TBC materials *** this paper,the solid-state heat transfer mechanism of TBCs is explained from two aspects,including heat conduction over the full operating temperature range and thermal radiation at medium and high *** paper also provides new insights into design considerations of adaptive TBC materials,and the challenges and potential breakthroughs are further highlighted for extreme environmental *** for improving thermophysical performance are proposed in two approaches:defect engineering and material compositing.

关键词： rare earth zirconates thermal barrier coatings defect engineering doping and compositing thermal conductivity thermal expansion

PDGFRB mutation causes intracranial aneurysm

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Journal of Genetics and Genomics 2024年第9期51卷 978-981页

作者： Junyu liu Chunling Wang enyu Huang Luming Wang Chengchao Wu Weixi Jiang Mei Wu Xiuru Zhang Junxia Yan Yeqi Wang Jingjing Zhang Department of Neurosurgery XiangYa HospitalCentral South UniversityChangshaHunan 410008China Department of Pharmacology Kyoto University Graduate School of MedicineKyoto 606-8501Japan Key Laboratory for Biorheological Science and Technology of Ministry of Education College of BioengineeringChongqing UniversityChongqing 400044China Affiliated Hospital of Guangdong Medical University&Zhanjiang Key Laboratory of Zebrafish Model for Development and Disease Guangdong Medical UniversityZhanjiangGuangdong 524001China Department of Epidemiology and Health Statistics XiangYa School of Public HealthCentral South UniversityChangshaHunan 410006China Hunan Provincial Key Laboratory of Clinical Epidemiology XiangYa School of Public HealthCentral South UniversityChangshaHunan 410006China

Intracranial aneurysm(IA)is characterized by defects in the middle muscular layer and pathological dilatation of cerebral *** rupture of IA,resulting in aneurysmal subarachnoid hemorrhage,poses a substantial public health problem,especially in developed countries,due to its high mortality,morbidity,and socioeconomic burden(Bakker and Ruigrok,2021).Understanding the risk factors for IA is critical for disease *** numerous studies(Yan et al.,2015;Santiago-Sim et al.,2016;Barak et al.,2021;liu et al.,2021)have highlighted familial aggregation of IA and identified candidate genes such as ADAMTS15,THSD1,ANK3,and PPIL4,the mechanisms underlying IA formation and rupture remain unclear.

关键词： al. aneurysm rupture

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超硬翅片滚刀加工在CNC磨床上的实现

制造技术与机床 2019年第10期 82-87页

作者：刘恩宇天津机电职业技术学院

在CNC高精磨床上实现超硬翅片滚刀加工的全部过程中,通过对树脂结合剂金刚石砂轮、陶瓷结合剂金刚石砂轮修整和磨削的实验对比,总结出陶瓷结合剂金刚石砂轮更适合于在CNC磨床上进行超硬翅片滚刀的加工,并确定了陶瓷结合剂金刚石砂轮修... 详细信息

在CNC高精磨床上实现超硬翅片滚刀加工的全部过程中,通过对树脂结合剂金刚石砂轮、陶瓷结合剂金刚石砂轮修整和磨削的实验对比,总结出陶瓷结合剂金刚石砂轮更适合于在CNC磨床上进行超硬翅片滚刀的加工,并确定了陶瓷结合剂金刚石砂轮修整工艺和超硬翅片滚刀在CNC高精磨床上的加工工艺。

关键词： CNC磨床超硬翅片滚刀精密修整金刚石砂轮

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聋教育方法演变与米兰会议

中国特殊教育 2006年第9期 53-58页

作者：付传彩刘恩玉北京师范大学教育学院特殊教育系北京100875 山东省潍坊市昌乐县北岩中学 262400

聋教育史实质上是聋校教学语言的发展史。聋教育创始之时至今已经历了几次语言方法的演变,从最初的手语、口语到综合交际法,以及双语双文化法,贯穿始终的还是手语和口语之间的争辩。在这个争辩的历史进程中,米兰会议起到了举足轻重的作... 详细信息

聋教育史实质上是聋校教学语言的发展史。聋教育创始之时至今已经历了几次语言方法的演变,从最初的手语、口语到综合交际法,以及双语双文化法,贯穿始终的还是手语和口语之间的争辩。在这个争辩的历史进程中,米兰会议起到了举足轻重的作用,它所提出的纯口语法的决议一度影响了聋教育的发展方向,影响了人们对聋教育方法的选择。然而国内至今没有米兰会议较为全面、客观的阐述,本文从会议缘起、决议、影响等方面回顾这一历史事实,使读者更好地了解聋教育史上这一重要的历史事件,为现行聋教育方法的选择提供历史的视角。

关键词：米兰会议聋教育方法纯口语法

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改进的基于卷积神经网络的图像超分辨率算法

光学学报 2017年第3期37卷 96-104页

作者：肖进胜刘恩雨朱力雷俊锋武汉大学电子信息学院湖北武汉430072 地球空间信息技术协同创新中心湖北武汉430079

针对现有的基于卷积神经网络的图像超分辨率算法参数较多、计算量较大、训练时间较长、图像纹理模糊等问题,结合现有的图像分类网络模型和视觉识别算法对其提出了改进。在原有的三层卷积神经网络中,调整卷积核大小,减少参数;加入池化层... 详细信息

针对现有的基于卷积神经网络的图像超分辨率算法参数较多、计算量较大、训练时间较长、图像纹理模糊等问题,结合现有的图像分类网络模型和视觉识别算法对其提出了改进。在原有的三层卷积神经网络中,调整卷积核大小,减少参数;加入池化层,降低维度,减少计算复杂度;提高学习率和输入子块的尺寸,减少训练消耗的时间;扩大图像训练库,使训练库提供的特征更加广泛和全面。实验结果表明,改进算法生成的网络模型取得了更佳的超分辨率结果,主观视觉效果和客观评价指标明显改善,图像清晰度和边缘锐度明显提高。

关键词：显微图像超分辨率深度学习卷积神经网络卷积核参数