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Fabrication,microstructures,and optical properties of Yb:Lu_(2)O_(3) laser ceramics from co-precipitated nano-powders

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Journal of Advanced Ceramics 2020年第6期9卷 674-682页

作者： Ziyu LIU Guido TOCI Angela PIRRI Barbara PATRIZI Yagang FENG jiabei wei Feng WU Zhaoxiang YANG Matteo VANNINI Jiang LI Key Laboratory of Transparent Opto-functional Inorganic Materials Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 201899China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Istituto Nazionale di Ottica Consiglio Nazionale delle RicercheCNR-INOSesto Fiorentino(Fi)50019Italy Istituto di Fisica Applicata“N.Carrara” Consiglio Nazionale delle RicercheCNR-IFACSesto Fiorentino(Fi)50019Italy School of Material Science and Engineering Jiangsu UniversityZhenjiang 212013China

The Yb:Lu_(2)O_(3)precursor made up of spherical particles was synthesized through the co-precipitation method in the water/ethanol *** 5 at% Yb:Lu_(2)O_(3)powder is in the cubic phase after calcination at 1100℃ for 4 *** powder also consists of spherical nanoparticles with the average particle and grain sizes of 96 and 49 nm,*** average grain size of the pre-sintered ceramic sample is 526 nm and that of the sample by hot isostatic pressing grows to 612 *** 1.0 mm-thick sample has an in-line transmittance of 81.6%(theoretical value of 82.2%)at 1100 *** largest absorption cross-section at 976 nm is 0.96×1^(0-20)cm^(2) with the emission cross-section at 1033 nm of 0.92×10^(-20)cm^(2) and the gain cross sections are calculated with the smallest population inversion parameter β of *** highest slope efficiency of 68.7% with the optical efficiency of 65.1% is obtained at 1033.3 nm in quasi-continuous wave(QCW)*** the case of continuous wave(CW)pumping,the highest slope efficiency is 61.0% with the optical efficiency of 54.1%.The obtained laser performance indicates that Yb:Lu_(2)O_(3)ceramics have excellent resistance to thermal load stresses,which shows great potential in high-power solid-state laser applications.

关键词： Yb:Lu_(2)O_(3)transparent ceramics co-precipitated nano-powder spectroscopic properties laser performance hot isostatic pressing

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Cold Hydrostatic Sintering:From shaping to 3D printing

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Journal of Materiomics 2019年第3期5卷 496-501页

作者： Anna Jiang Daoyao Ke Ludi Xu Qiang Xu Jiang Li jiabei wei Chunfeng Hu Salvatore Grasso Key Laboratory of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu610031China Key Laboratory of Transparent Opto-functional Inorganic Materials Shanghai Institute of CeramicsChinese Academy of SciencesShanghai201899China

We developed a novel consolidation technique,Cold Hydrostatic Sintering(CHS),which allows near full densification of *** technique is inspired by biosilicification and geological formation of siliceous *** established cold sintering method which is based on uniaxial pressure,CHS employs an isostatic pressure to enable room temperature consolidation of bulks having a complex threedimensional *** resulting material is transparent(in line transmittance exceeding 70% in the visible range)and *** drying,the Vickers hardness was as high 1.4 GPa which half of materials consolidated at 1200℃ and it is the highest among all materials processed at room *** CHS method,because of its simplicity,might be suitable for broad range of applications including 3D printing,mould forming and preparation of multi-layered *** of the absence of the firing step,CHS could be directly integrated in the manufacturing of a wide range of hybrid(organic/inorganic)materials for functional and biological applications.

关键词： Silica Cold Hydrostatic Sintering(CHS) Shaping 3D printing

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高速公路波形梁护栏对风吹雪灾害的影响研究

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冰川冻土 2022年第6期44卷 1887-1897页

作者：魏佳北中铁建苏州设计研究院有限公司江苏苏州215004

风吹雪是新疆道路交通典型的雪害形式之一,其对道路交通的影响主要体现在降低行车能见度和导致路面大量积雪造成交通中断。新疆地区道路沿线风吹雪灾害呈现出“点多线长面广”且时空分布不均匀的特点,风吹雪涉及到风-雪-温度-湿度等多... 详细信息

风吹雪是新疆道路交通典型的雪害形式之一,其对道路交通的影响主要体现在降低行车能见度和导致路面大量积雪造成交通中断。新疆地区道路沿线风吹雪灾害呈现出“点多线长面广”且时空分布不均匀的特点,风吹雪涉及到风-雪-温度-湿度等多场耦合,是非常复杂的科学问题。同时,风吹雪灾害防治也是寒区道路交通基础设施建设和运营中亟需解决的实际问题。对于位于风吹雪多发地区的高速公路而言,由波形梁护栏引起的道路风吹雪灾害越来越突出,但目前尚缺乏对波形梁护栏这种高速公路附属设施加深风吹雪灾害的深入研究。针对上述现状,为探究其成因和防治方法,以新疆京新高速公路(G7)为工程背景,设计了波形梁护栏、缆索护栏和无护栏路堤的现场模型试验,并结合数值模拟及公路现场调研等方法,研究了高速公路波形梁护栏和缆索护栏对路面风吹雪灾害的影响,得出设置波形梁护栏和缆索护栏等的路堤路面上的风雪场分布规律。研究结果表明,风雪流从上风侧路堤坡脚处增速,到达设置在路面路肩处或中央分隔带处的波形梁处,通过波形梁护栏下部空隙运动至路面,波形梁护栏对近地面风场产生扰动,使得梁后出现弱风区,导致大量雪粒沉积。尤其当波形梁护栏下部空隙被雪填满后,波形梁后侧的路面积雪覆盖行车道,严重影响公路通行能力,而不设置护栏或者设置缆索护栏的地段有利于风雪流通过。考虑到未来气候变化的不确定性,为更好防范风吹雪对交通运营安全的影响,提出可将部分风吹雪灾害严重地段的波形梁护栏更换为符合高速公路安全要求的缆索护栏的初步建议,也可增设防雪栅、挡雪板及挡雪墙等其他防风雪措施。研究成果可为高速公路运营期间的除雪保畅工作及新疆风吹雪多发地区高速公路的建设提供有益借鉴。

关键词：风吹雪高速公路波形梁护栏模型试验数值模拟

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Yb∶CaF2透明陶瓷的制备与性能研究

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人工晶体学报 2020年第5期49卷 799-803页

作者：刘强刘阳韦家蓓谢腾飞李江江苏大学材料科学与工程学院镇江212013 中国科学院上海硅酸盐研究所透明光功能无机材料重点实验室上海201899 中国科学院大学材料与光电中心北京100049

采用共沉淀法合成5at%Yb∶CaF2纳米粉体。该粉体为纯立方CaF2相,平均颗粒尺寸为45 nm。Yb∶CaF2纳米粉体呈立方体状,具有较好的分散性。通过真空预烧结合热等静压烧结(HIP)后处理制备5at%Yb∶CaF2透明陶瓷,研究了真空预烧温度对陶瓷物... 详细信息

采用共沉淀法合成5at%Yb∶CaF2纳米粉体。该粉体为纯立方CaF2相,平均颗粒尺寸为45 nm。Yb∶CaF2纳米粉体呈立方体状,具有较好的分散性。通过真空预烧结合热等静压烧结(HIP)后处理制备5at%Yb∶CaF2透明陶瓷,研究了真空预烧温度对陶瓷物相、致密度、显微结构及光学透过率的影响。结果表明,不同温度真空预烧的陶瓷均为纯立方相,在650℃真空预烧的5at%Yb∶CaF2陶瓷经HIP处理后具有最好的光学质量,其在1200 nm处的直线透过率达到87%(厚度为3 mm)。

关键词： Yb∶CaF2 透明陶瓷显微结构光学透过率

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一种安全节能公路隧道照明灯具布设方法

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地下空间与工程学报 2021年第S2期17卷 762-770页

作者：王兆延张新斌魏佳北丘东元张波华南理工大学电力学院中铁建公路运营有限公司中铁建苏州设计研究院有限公司

消除车辆驶入隧道时驾驶员视觉出现的黑洞现象是隧道照明设计中的难题。按现有标准进行设计,照明段间存在亮度突变,会造成黑圈现象,对行车安全性有一定影响。基于CIE适应性曲线进行灯具布设可解决上述问题,但需要增加大量灯具,提高了运... 详细信息

消除车辆驶入隧道时驾驶员视觉出现的黑洞现象是隧道照明设计中的难题。按现有标准进行设计,照明段间存在亮度突变,会造成黑圈现象,对行车安全性有一定影响。基于CIE适应性曲线进行灯具布设可解决上述问题,但需要增加大量灯具,提高了运营成本。为此,本文提出一种安全节能的隧道灯具布设方法,该方法首先优化了CIE适应性曲线的入口段长度,然后采用变间距的方式分段选取灯具间距,使隧道亮度符合优化后的CIE适应性曲线。最后,本文在DIALux中开展了仿真验证,对比了现有标准灯具布设方法和所提优化灯具布设方法下的各项照明评价指标,证明了所提方法具有有效消除段间黑圈现象、性价比高等优点。

关键词：隧道照明灯具间距节能安全

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基于双向奔袭策略的改进狼群算法研究

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控制工程 2024年第8期31卷 1392-1404页

作者：任剑翔梁雨佳魏佳蓓张硕硕刘国华东南大学数学学院江苏南京210000

基于传统狼群算法(wolf pack algorithm,WPA)的基本思想提出了双向狼群算法(towards two directions wolf pack algorithm,T2WPA)。针对原算法对已知优良信息利用率的不足,T2WPA对猛狼奔袭过程进行改进:引入双向奔袭的概念,并给出新老... 详细信息

基于传统狼群算法(wolf pack algorithm,WPA)的基本思想提出了双向狼群算法(towards two directions wolf pack algorithm,T2WPA)。针对原算法对已知优良信息利用率的不足,T2WPA对猛狼奔袭过程进行改进:引入双向奔袭的概念,并给出新老头狼产生规则和猛狼位置更新机制。基于以上改进思想,分别按照与文献[9]和文献[10]相同的参数,选取文献中对应的基准函数来测试T2WPA的性能,最后将测试结果与文献进行对比。仿真结果表明,T2WPA具有良好的全局搜索能力和计算精度。

关键词：狼群算法群体智能函数优化

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Brain region-specific roles of brain-derived neurotrophic factor in social stress-induced depressive-like behavior

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Neural Regeneration Research 2025年第1期20卷 159-173页

作者： Man Han Deyang Zeng wei Tan Xingxing Chen Shuyuan Bai Qiong Wu Yushan Chen Zhen wei Yufei Mei Yan Zeng Brain Science and Advanced Technology Institute Wuhan University of Science and TechnologyWuhanHubei ProvinceChina Geriatric Hospital Affiliated to Wuhan University of Science and Technology WuhanHubei ProvinceChina School of Public Health Wuhan University of Science and TechnologyWuhanHubei ProvinceChina

Brain-derived neurotrophic factor is a key factor in stress adaptation and avoidance of a social stress behavioral *** studies have shown that brain-derived neurotrophic factor expression in stressed mice is brain region–specific,particularly involving the corticolimbic system,including the ventral tegmental area,nucleus accumbens,prefrontal cortex,amygdala,and *** how brain-derived neurotrophic factor participates in stress processing in different brain regions will deepen our understanding of social stress *** this review,we discuss the expression and regulation of brain-derived neurotrophic factor in stress-sensitive brain regions closely related to the pathophysiology of *** focused on associated molecular pathways and neural circuits,with special attention to the brain-derived neurotrophic factor–tropomyosin receptor kinase B signaling pathway and the ventral tegmental area–nucleus accumbens dopamine *** determined that stress-induced alterations in brain-derived neurotrophic factor levels are likely related to the nature,severity,and duration of stress,especially in the above-mentioned brain regions of the corticolimbic ***,BDNF might be a biological indicator regulating stress-related processes in various brain regions.

关键词： amygdala chronic mild stress chronic social defeat stress corticolimbic system depression hippocampus medial prefrontal cortex nucleus accumbens social stress models ventral tegmental area

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From text to image:challenges in integrating vision into ChatGPT for medical image interpretation

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Neural Regeneration Research 2025年第2期20卷 487-488页

作者： Shunsuke Koga wei Du Department of Pathology and Laboratory Medicine Hospital of the University of PennsylvaniaPhiladelphiaPAUSA

Large language models(LLMs),such as ChatGPT developed by OpenAI,represent a significant advancement in artificial intelligence(AI),designed to understand,generate,and interpret human language by analyzing extensive text *** potential integration into clinical settings offers a promising avenue that could transform clinical diagnosis and decision-making processes in the future(Thirunavukarasu et al.,2023).This article aims to provide an in-depth analysis of LLMs’current and potential impact on clinical *** ability to generate differential diagnosis lists underscores their potential as invaluable tools in medical practice and education(Hirosawa et al.,2023;Koga et al.,2023).

关键词： image diagnosis text

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Prospects of elafibranor in treating alcohol-associated liver diseases

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World Journal of Gastroenterology 2025年第2期31卷 132-137页

作者： wei-Tong Cui Hua-Ru Xue Dian-Fang wei Xiao-Yu Feng Kai Wang School of Basic Medicine Qilu Medical UniversityZibo 255300Shandong ProvinceChina School of Medical Imaging Qilu Medical UniversityZibo 255300Shandong ProvinceChina

Alcohol-related liver disease(ALD),which is induced by excessive alcohol con-sumption,is a leading cause of liver-related morbidity and *** pa-tients exhibit a spectrum of liver injuries,including hepatic steatosis,inflam-mation,and fibrosis,similar to symptoms of nonalcohol-associated liver diseases such as primary biliary cholangitis,metabolic dysfunction-associated steatotic liver disease,and nonalcoholic *** has been approved for the treatment of primary biliary cholangitis and has been shown to improve symptoms in both animal models and in vitro cell models of metabolic dysfunc-tion-associated steatotic liver disease and nonalcoholic ***,the efficacy of elafibranor in treating ALD remains *** this article,we comment on the recent publication by Koizumi et al that evaluated the effects of elafibranor on liver fibrosis and gut barrier function in an ALD mouse *** findings indicate the potential of elafibranor for ALD treatment,but further experimental investigations and clinical trials are warranted.

关键词： Elafibranor Alcohol-associated liver diseases Peroxisome proliferator-activated receptor Lipid Apoptosis Steatosis Inflammation Fibrosis

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Network pharmacology:Changes the treatment mode of"one disease-one target"in cancer treatment

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World Journal of Gastrointestinal Oncology 2025年第1期17卷 268-271页

作者： Shuai Liu Yong-wei Yu Department of Cardiology The First People’s Hospital of JiashanJiaxing 314100Zhejiang ProvinceChina Department of Critical Care Medicine The First Affiliated Hospital of Zhejiang University School of MedicineHangzhou 310000Zhejiang ProvinceChina

The article concluded that network pharmacology provides new ideas and insights into the molecular mechanism of traditional Chinese medicine(TCM)treatment of *** is a new choice and hot spot in the field of cancer *** have also previously published studies on TCM and network *** this letter,we summarize the new paradigm of network pharmacology in cancer treatment mechanisms.

关键词： Network pharmacology Cancer Multicomponent Multitarget Therapy

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