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Ultrafast optoelectronic technology for radio metrology applications

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Journal of Systems Engineering and Electronics 2010年第3期21卷 461-468页

作者： Zhe ma hongmei ma Pengwei Gong Chuntao Yang Keming Feng Beijing Institute of Radio Metrology and Measurement Beijing 100854 R R. China National Key Lab of Metrology and Calibration Technology Beijing 100854 P. R. China

Ultrafast optoelectronic technology has been widely used in terahertz time domain spectrum,terahertz imaging technology,terahertz communication and so on,and great progress has been achieved in the past two ***,this innovative technology has been applied in radio metrology and supplied a potential and hopeful method to solve the existent challenges of calibration devices and equipments with bandwidth up to 100 *** paper generally summarizes the emerging applications of the ultrafast optoelectronic technology in radio *** main applications of this technology in calibrating broadband sampling oscilloscopes,the high-speed photodiodes and calibrating the electrical pulse generators are emphasized,and the testing of monolithic microwave integrated circuits is also presented.

关键词： ultrafast optoelectronic technology terahertz pulse radio metrology electrooptic sampling(EOS).

Multi-Layer Deep Sparse Representation for Biological Slice Image Inpainting

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Computers, materials & Continua 2023年第9期76卷 3813-3832页

作者： Haitao Hu hongmei ma Shuli Mei College of Information and Electrical Engineering China Agricultural UniversityBeijing100000China Yantai Research Institute China Agricultural UniversityYantai264670China

Biological slices are an effective tool for studying the physiological structure and evolutionmechanism of biological ***,due to the complexity of preparation technology and the presence of many uncontrollable factors during the preparation processing,leads to problems such as difficulty in preparing slice images and breakage of slice ***,we proposed a biological slice image small-scale corruption inpainting algorithm with interpretability based on multi-layer deep sparse representation,achieving the high-fidelity reconstruction of slice *** further discussed the relationship between deep convolutional neural networks and sparse representation,ensuring the high-fidelity characteristic of the algorithm first.A novel deep wavelet dictionary is proposed that can better obtain image prior and possess learnable *** multi-layer deep sparse representation is used to implement dictionary learning,acquiring better signal *** with methods such as NLABH,Shearlet,Partial Differential Equation(PDE),K-Singular Value Decomposition(K-SVD),Convolutional Sparse Coding,and Deep Image Prior,the proposed algorithm has better subjective reconstruction and objective evaluation with small-scale image data,which realized high-fidelity inpainting,under the condition of small-scale image *** theOn2-level time complexitymakes the proposed algorithm *** proposed algorithm can be effectively extended to other cross-sectional image inpainting problems,such as magnetic resonance images,and computed tomography images.

关键词： Deep sparse representation image inpainting convolutional sparse modelling deep neural network

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中国式现代化视域下人的高质量发展探究

山西高等学校社会科学学报 2025年第1期37卷 28-34页

作者：马红梅邹秀春山西医科大学马克思主义学院山西太原030001 北京体育大学马克思主义学院北京100084

人的现代化是中国式现代化的核心。通过人的高质量发展促进人的现代化,对于实现中国式现代化具有重要意义。基于马克思主义人学理论,从“现实的人”和“社会的人”来理解人的发展,为人的高质量发展提供了理论基础。中国式现代化从“人... 详细信息

人的现代化是中国式现代化的核心。通过人的高质量发展促进人的现代化,对于实现中国式现代化具有重要意义。基于马克思主义人学理论,从“现实的人”和“社会的人”来理解人的发展,为人的高质量发展提供了理论基础。中国式现代化从“人”这个现代化的主体出发,构建了以创新、协调、绿色、开放、共享为内容的高质量发展路径。人的高质量发展最终以实现人的自由全面发展为价值目标,并将创建人类文明新形态。

关键词：中国式现代化人的高质量发展人的自由全面发展

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Fabrication of AlN-TiC/Al composites by gas injection processing

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Rare Metals 2006年第6期25卷 659-664页

作者： YU Huashun CHEN hongmei ma Rendian MIN Guanghui The Key Laboratory of Liquid Structure and Heredity of materials Ministry of Education Shandong University Jinan 250061 China

The fabrication of AlN-TiC/Al composites by carbon- and nitrogen-containing gas injection into Al-Mg-Ti melts was studied. It was shown that AlN and TiC particles could be formed by the in situ reaction of mixture gas （N2 ＋ C2H2 ＋ NH3） with Al-Mg-Ti melts. The condition for the formation of AlN was that the treatment temperature must be higher than 1373 K, and the amounts of AlN and TiC increased with the increase of the treatment temperature and the gas injection time It was considered that AlN was formed by the direct reaction of Al with nitrogen-containing gas at the interface of the gas bubble and the melt. However, the mechanism of TiC formation is a combination mechanism of solution-precipitation and solid-liquid reaction.

关键词： in situ composites gas injection aluminum nitride titanium carbide

major ions and trace metals in glacial meltwaters nearby Ny-Ålesund, Svalbard

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Acta Oceanologica Sinica 2024年第10期43卷 86-99页

作者： Zhan Shen Liping Ye Jing Zhang hongmei ma Ruifeng Zhang Key Laboratory of Polar Ecosystem and Climate Change of Ministry of Education and School of Oceanography Shanghai Jiao Tong UniversityShanghai 200030China State Key Laboratory of Estuarine and Coastal Research East China Normal UniversityShanghai 200062China Laboratory for Polar Science Polar Research Institute of ChinaMinistry of Natural ResourcesShanghai 200136China Shanghai Key Laboratory of Polar Life and Environment Sciences Shanghai Jiao Tong UniversityShanghai 200030China

Ny-Ålesund,located in Arctic Svalbard,is one of the most sensitive areas on Earth to global *** recent years,accelerated glacier ablation has become remarkable in Ny-Å*** meltwaters discharge a substantial quantity of materials to the ocean,affecting downstream ecosystems and adjacent *** August 2015,various water samples were taken near Ny-Ålesund,including ice marginal meltwater,proglacial meltwater,supraglacial meltwater,englacial meltwater,and *** metals(Al,Cr,Mn,Fe,Co,Cu,Zn,Cd,and Pb),major ions,alkalinity,pH,dissolved oxygen,water temperature and electric conductivity were also *** ions were mainly controlled by chemical weathering intensity and reaction types,while trace metals were influenced by both chemical weathering and physicochemical control upon their ***,we found that Brøggerbreen was dominated by carbonate weathering via carbonation of carbonate,while Austre Lovénbreen and Pedersenbreen were dominated by sulfide oxidation coupled with carbonate dissolution with a doubled silicate *** higher enrichment of trace metals in supraglacial meltwater compared to ice marginal and proglacial meltwater suggested anthropogenic pollution from atmospheric *** ice marginal and proglacial meltwater,principal component analysis indicated that trace metals like Cr,Al,Co,Mn and Cd were correlated to chemical *** implies that under accelerated glacier retreat,glacier-derived chemical components are subjected to future changes in weathering types and intensity.

关键词： Arctic glacial meltwater weathering major ions trace metals

Quantitative analysis of Arctic ice flow acceleration with increasing temperature

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Acta Oceanologica Sinica 2021年第1期40卷 22-32页

作者： Zemin Wang Boya Yan Songtao Ai Kim Holmén Jiachun An hongmei ma Chinese Antarctic Center of Surveying and mapping Wuhan UniversityWuhan 430079China Norwegian Polar Institute Longyearbyen 9170Norway Polar Research Institute of China Shanghai 200136China

This study explores the ice flow acceleration(21.1%)of Pedersenbreen during 2016–2017 after the extremely warm winter throughout the whole Arctic in 2015/2016 using in situ data and quantitatively analyses the factors contributing to this *** data sets,including 2008–2018 air temperature data from Ny-?lesund,ten-year in situ GPS measurements and Elmer/Ice ice flow modelling under different ice temperature scenarios,suggest that the following factors contributed to the ice flow acceleration:the softened glacier ice caused by an increase in the air temperature(1.5℃)contributed 2.7%–30.5%,while basal lubrication contributed 69.5%–97.3%.The enhanced basal sliding was mostly due to the increased surface meltwater penetrating to the bedrock under the rising air temperature conditions;consequently,the glacier ice flow acceleration was caused mainly by an increase in subglacial *** Pedersenbreen,there was an approximately one-year time lag between the change in air temperature and the change in glacier ice flow velocity.

关键词： ice flow velocity Arctic temperature rising Pedersenbreen Elmer/Ice meltwater

Leading for Whom? Teaching-Research Officers' Role Perception and Work Engagement in Chinese mainland

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ECNU Review of Education 2022年第3期5卷 491-508页

作者： Wei Shen hongmei ma East China Normal University Department of Education Economics and Administration Central China Normal UniversityHongshan DistrictWuhanChina

Purpose:Thepurpose of this article is toanalyzeboth teaching-research officers'(TROs)role perceptions and work engagement,figuring out how their competing roles are balanced to ensure continued work engagement and which roles havegreater benefits to the community and educational ***/Approach/Methods:The study employs a questionnaire,which is composed of an inventory of work role requirements and the Utrecht Work Engagement Scale,to investigate TROs'role perception,work engagement,and their ***:TROs'work experience had a complicated relationship with their work *** two strands of the TROs'role orientation co-existed within their daily work and strengthened each other through exerting effects on the dedication and absorption aspects of work ***,TROs concerned with teacher development displayed higher work engagement than those who put a greater emphasis on policy ***/Value:The study contributes to current research in three ***,it bridges the macro-level trend of education reform with micro-level role internalization of ***,it broadens our understanding of work engagement by linking it with the subjective perceptions of one's work ***,this Chinese case is expected to enrich international perspectives on teacher leaders in the context of top-down districtwide instructional reform.

关键词： Role perception teacher leader work engagement

Narrow-band high-transmittance birefringent filter and its application in wide color gamut display

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Chinese Physics B 2021年第5期30卷 401-405页

作者： Chi Zhang Rui Niu Wenjuan Li Xiaoshuai Li hongmei ma Yubao Sun School of Electronic and Information Engineering Hebei University of TechnologyTianjin 300401China Department of Applied Physics Hebei University of TechnologyTianjin 300401China

We propose a narrow-band birefringent filter and its application in wide color *** birefringent filter consists of five phase retarders and two polarizers,and it has both narrow band and high *** the experiment,we fabricate the birefringent filter using quartz phase retarders and polarizers,and apply it in serval different *** color gamuts of displays are enhanced more than 30%NTSC(National Television System Committee),and the widest color gamuts that have been obtained are 126%NTSC in liquid crystal displays and 138%NTSC in organic light-emitting ***,the deep blue light in spectrum of display can be reduced using the birefringent *** birefringent filter can be an efficient element to achieve wide color gamut display.

关键词： narrow band filter wide color gamut display

Defect characterization of amorphous silicon thin film solar cell based on low frequency noise

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Science China(Information Sciences) 2018年第6期61卷 253-255页

作者： Linna HU Liang HE Hua CHEN Xiaofei JIA Ying HU hongmei ma DANDan GUO Yu QIN School of Advanced materials and Nanotechnology Xidian University School of Electronic and Information Engineering Ankang University

Dear editor,The reliability of solar cells is the key factor to determine the performance and lifetime of photovoltaic *** to the insensitivity of traditional electrical detection and the limitations of in-situ charac... 详细信息

关键词： Defect characterization of amorphous silicon thin film solar cell based on low frequency noise GR