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A　Preliminary　Study　of　Dielectric　Properties　and　Structures　of　NBT-SCN　System

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Wuhan University Journal of Natural Sciences 1997年第1期2卷 129-130页

作者： Tang, Yiwen Dai, Mingxing Wang, Renhui gui, jianian Wuhan University Department of Physics Wuhan China (GRID:grid.49470.3e) (ISNI:***)

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关键词： Dielectric Study System Preliminary SCN NBT-SCN

Extraction of Wind Stress from HF Radar Sea-Echo Doppler Spectra

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Wuhan University Journal of Natural Sciences 1999年第1期4卷 73-75页

作者： Chen Xiaomei Liu Jing Wang Jianbo Zhang Ruikang Wang Dahai Wang Renhui gui jianian Chen Fangyu Department of Physics Wuhan University Wuhan 430072China Technical Center Wuhan Iron and Steel Co. Wuhan 430080China

This paper describes our preliminary results by using electron backscatter diffraction(EBSD) attachment in a scanning electron microscope. These studies revealed that the basal plane of 2H martensite originates from one {220} P plane of the parent phase, four variants A,B,C,D of a self accommodating plate group originate from various {220} P planes of the parent phase. Their orientation relationships can be determined by EBSD technique. The structural information provided by EBSD technique together with the composition information provided by energy dispersive X ray spectrometer leads to much convincible identification of micro area phases. By this method three phases were identified in as cast Al Cu Fe alloys with composition near that of icosahedral quasicrystal(IQC), namely IQC, λ Al 13 Fe 4 and β phases. Two types of grains were found in an interstitial free steel recrystallized at 750℃.Among them the flat grains possess γ fibre microtexture benifitial to the cold workability.

关键词： electron backscatter diffraction shape memory alloy interstitial free steel microtexture

IN SITU TEM OBSERVATION OF MICROSTRUCTURES OF AUSTENITIC-0.45%C STEELS WELD JOINT

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Acta Metallurgica Sinica(English Letters) 1989年第3期2卷 225-227页

作者： PAN Chunxu SHI Yuxiang WANG Renhui gui jianian Wuhan University,Wuhan,China Wuhan University of Water Transportation Engineering,Wuhan,China Professor,Department of Physics,Wuhan University,Wuhan,China

The successive alteration o the microstructure from the weld metal zone through weld bond to the heat affected zone of a Cr18Ni13 austenitic-0.45%C steels weld joint was observed in situ using transmission electron *** was found a new type of microstructure called pearlite-like structure and observed the characteristics of the boundary of dissimilar phases. Based on the definition of various zones of the dissimilar steels weld joint under the optical mi- croscope,the transmission electron microscopic characteristics,including microstructures and compositions,of each zone are described and discussed.

关键词： weld joint microstructure TEM observation pearlite-like structure

Potential role of tanycyte-derived neurogenesis in Alzheimer's disease

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Neural Regeneration Research 2025年第6期20卷 1599-1612页

作者： guibo Qi Han Tang jianian Hu Siying Kang Song Qin Department of Anatomy Histologyand EmbryologySchool of Basic Medical SciencesFudan UniversityShanghaiChina State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science Fudan UniversityShanghaiChina

Tanycytes, specialized ependymal cells located in the hypothalamus, play a crucial role in the generation of new neurons that contribute to the neural circuits responsible for regulating the systemic energy balance. The precise coordination of the gene networks controlling neurogenesis in naive and mature tanycytes is essential for maintaining homeostasis in adulthood. However, our understanding of the molecular mechanisms and signaling pathways that govern the proliferation and differentiation of tanycytes into neurons remains limited. This article aims to review the recent advancements in research into the mechanisms and functions of tanycyte-derived neurogenesis. Studies employing lineage-tracing techniques have revealed that the neurogenesis specifically originating from tanycytes in the hypothalamus has a compensatory role in neuronal loss and helps maintain energy homeostasis during metabolic diseases. Intriguingly,metabolic disorders are considered early biomarkers of Alzheimer's disease. Furthermore,the neurogenic potential of tanycytes and the state of newborn neurons derived from tanycytes heavily depend on the maintenance of mild microenvironments, which may be disrupted in Alzheimer's disease due to the impaired blood–brain barrier ***, the specific alterations and regulatory mechanisms governing tanycyte-derived neurogenesis in Alzheimer's disease remain unclear. Accumulating evidence suggests that tanycyte-derived neurogenesis might be impaired in Alzheimer's disease, exacerbating neurodegeneration. Confirming this hypothesis, however, poses a challenge because of the lack of long-term tracing and nucleus-specific analyses of newborn neurons in the hypothalamus of patients with Alzheimer's disease. Further research into the molecular mechanisms underlying tanycyte-derived neurogenesis holds promise for identifying small molecules capable of restoring tanycyte proliferation in neurodegenerative diseases. This line of investigation could pro

关键词： Alzheimer's disease blood–brain barrier ependymoglial cells hypothalamus metabolic diseases neural stem cells neurogenesis neuroinflammatory diseases neurons tanycyte

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40CrNiMo钢中的氢扩散及正电子湮灭

武汉大学学报(自然科学版) 1985年第2期 95-96页

作者：杜凤牡桂嘉年王子孝

40CrNiMo钢具有较好综合机械性能和工艺性能,主要用于航空材料,根据对其强度和韧性的要求不同,可采取多种淬、回火处理。研究氢在该材科中的扩散行为及抵抗氢损伤的能力有重要意义。本文采用电化学渗透法[1]测定回火温度对氢扩散系数和... 详细信息

40CrNiMo钢具有较好综合机械性能和工艺性能,主要用于航空材料,根据对其强度和韧性的要求不同,可采取多种淬、回火处理。研究氢在该材科中的扩散行为及抵抗氢损伤的能力有重要意义。本文采用电化学渗透法[1]测定回火温度对氢扩散系数和表面溶解度的影响,并与正电子湮灭多谱勒展宽线型参数S对比,论证了正电子湮灭参量与氢扩散行为间的关系。

关键词：回火温度 Cr Ni 正电子湮灭回火处理对应关系化学渗透法马氏体金相相组成

LiBi_xMn_(2-x)O_4的结构及电化学性能

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电池 2005年第1期35卷 8-9页

作者：代忠旭詹晖周运鸿桂嘉年王仁卉武汉大学物理科学与技术学院湖北武汉430072 武汉大学化学与分子科学学院湖北武汉430072

用高温固相反应法合成了一系列尖晶石LiBixMn2-xO4(0≤x≤0 030)。通过XRD、TEM和恒流充放电法,对样品的结构和电化学性能进行了研究。结果表明:当x≤0 010时,掺铋样品具有纯尖晶石结构和较好的电化学性能,LiBi0 005Mn1 995O4在不降低... 详细信息

用高温固相反应法合成了一系列尖晶石LiBixMn2-xO4(0≤x≤0 030)。通过XRD、TEM和恒流充放电法,对样品的结构和电化学性能进行了研究。结果表明:当x≤0 010时,掺铋样品具有纯尖晶石结构和较好的电化学性能,LiBi0 005Mn1 995O4在不降低初始容量的同时,明显改善了材料的循环性能。

关键词：锂离子电池正极材料锂锰氧化物铋

ELECTRON BACKSCATTER DIFFRACTION DETERMINATION OF GRAIN ORIENTATION AND CONSTITUENT PHASES

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Wuhan University Journal of Natural Sciences 1999年第2期4卷 55-55页

作者： Chen, Xiaomei Liu, Jing Wang, Jianbo Zhang, Ruikang Wang, Dahai Wang, Renhui gui, jianian Chen, Fangyu Wuhan University Department of Physics Wuhan China (GRID:grid.49470.3e) (ISNI:***) Wuhan Iron and Steel Co. Technical Center Wuhan China (GRID:grid.49470.3e)

ELECTRON BACKSCATTER DIFFRACTION DETERMINATION OF GRAIN ORIENTATION AND CONSTITUENT PHASES... 详细信息

ELECTRON BACKSCATTER DIFFRACTION DETERMINATION OF GRAIN ORIENTATION AND CONSTITUENT PHASES...

关键词： electron backscatter diffraction shape memory alloy interstitial-free steel microtexture

Copy number variation of NAL23 causes narrow-leaf development in rice

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Journal of Genetics and Genomics 2024年第8期51卷 880-883页

作者： Degui Zhou Yajing Li Xianrong Xie Wenyan Ding Libin Chen Tie Li jianian Tang Xiyu Tan Weizhi Liu Yueqin Heng Yongyao Xie Letian Chen Qi Liu Shaochuan Zhou Jing Zhao Gong Zhang Jiantao Tan Yaoguang Liu Rongxin Shen State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources Guangdong Laboratory for Lingnan Modern AgricultureCollege of Life SciencesSouth China Agricultural UniversityGuangzhouGuangdong 510642China Guangdong Key Laboratory of New Technology in Rice Breeding Rice Research InstituteGuangdong Academy of Agricultural SciencesGuangzhouGuangdong 510640China Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes and MOE Key Laboratory of Tumor Molecular Biology Institute of Life and Health EngineeringJinan UniversityGuangzhouGuangdong 510632China

Leaf shape is a key trait for plant architecture relating to photosynthesis and transpiration in plants(Lawson et al.,2020).Erect leaves with proper leaf length and width,particularly the upper three leaves in cereal crops,could significantly improve light absorption efficiency in canopy and ultimately increase crop yield(Jiao et al.,2010).Rice leaves initiate at the peripheral zone of shoot apical meristem,then develop along the proximal-distal,adaxial-abaxial,and mediallateral axes to form a flat symmetric architecture(Du et al.,2018).

关键词： crops cereal narrow

观众视角下学术展览的评估研究——以“玉韫·九州:中国早期文明间的碰撞与聚合”展为例

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文博 2024年第2期 88-95页

作者：张静张家年陕西历史博物馆陕西西安710061

展览是博物馆的核心,是博物馆最具代表性的名片。长期以来,展览的设计与评估基本是由相关行业的专家完成的,观众介入展览的渠道并不畅通。因此,本文从观众视角出发,选取“玉韫·九州:中国早期文明间的碰撞与聚合”展览为例进行研究,尝... 详细信息

展览是博物馆的核心,是博物馆最具代表性的名片。长期以来,展览的设计与评估基本是由相关行业的专家完成的,观众介入展览的渠道并不畅通。因此,本文从观众视角出发,选取“玉韫·九州:中国早期文明间的碰撞与聚合”展览为例进行研究,尝试从展览内容、展览形式和展览相关配套内容三个方面构建出展览总结评估的指标体系,依据AHP层次分析法确立各指标权重,由观众的评分结合权重得出总结评估的结果为4.42(满分为5),反映出观众对展览表现出较高程度的支持和认可。观众参与下的展览评估将为博物馆发展提供更加多元化的助力。

关键词：观众视角展览评估 “玉韫·九州”展览