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Growth,optical dispersion and magnetic behavior of Dy^(3+) doped yttrium iron garnet crystals

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Journal of Rare Earths 2024年第6期42卷 1110-1117,I0004页

作者： Yating Fang Hui shen Yudie Ma shijie Liao Shuang Xia Tian Tian Ding Zhou Yunfeng Ma Jiayue Xu Institute of Crystal Growth School of Materials Science and EngineeringShanghai Institute of Technology National Engineering Center of Electromagnetic Radiation Control Materials School of Electronic Science and EngineeringUniversity of Electronic Science and Technology of China

Y_(3)Fe_(5)O_(12)(YIG)crystals are highly desirable for the fabrication of mid-infrared isolators with the rapid growth of optical communications,although it is rather challenging to grow large size and high-quality single crystals.Dy^(3+)doping is expected to improve the optical and magneto-optical prope rties.However,high quality Dy:YIG crystals and the adjustment of Dy^(3+)on the structure and optical behavior of YIG crystal remain unclear,impeding its practical applications.Herein,a series of Y_(3-x)Dy_(x)Fe_(5)O_(12)(x=0,0.5,1.0,1.5,3)solid solution crystals was grown by the flux-Bridgman method and single crystals up to 25 mm were obtained.With the introduction of Dy^(3+),lattice parameters are gradually enlarged from 1.2379 nm(YIG)to 1.2420 nm(DyIG).Typical Dy^(3+)absorption peaks are observed around 1070,1265 and 1670 nm.The refractive index decreases from 2.37(500 nm)to 2.10(2500 nm)for YIG crystal,and it reduces from 2.47(500 nm)to 2.16(2500 nm)for DyIG crystal.The optical bandgaps remain almost unchanged for Dy:YIG crystals.The optical dispersion of the refractive indices was finely fitted by the Wemple and DiDomenico(WDD)and the Sellmeier models,respectively.With the increase of Dy^(3+)content,the saturation magnetization(Ms)decreases significantly from 23.62 emu/g(YIG)to 5.33 emu/g(DyIG).Small coercive field is persisted for this system,endowing small external magnetic field.These results provide valuable references for the manipulation of rare earths on the properties of magnetooptical crystals,which is beneficial to the design of high-performance garnet crystals for the application of optical switching and non-reciprocal related devices.

关键词： Magneto-optical crystal Yttrium iron garnet Dy^(3+)doping Crystal growth Optical dispersion Rare earths

A novel mouse model of PEDF-associated serious liver inflammation,hepatic tumorigenesis and cardiovascular injury mimics human nonalcoholic steatohepatitis

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Genes & Diseases 2024年第1期11卷 11-14页

作者： Xinghui Li Haiping Wang Yandi Wu Li Zou shijie Dengg Xintu Fu Tongsheng Huang Conghui shen Teng Wu Weibin Cai Guangdong Engineering&Technology Research Center for Disease-Model Animals Laboratory Animal CenterZhongshan School of MedicineSun Yat-sen UniversityGuangzhouGuangdong 510080China Department of Biochemistry Zhongshan School of MedicineSun Yat-sen UniversityGuangzhouGuangdong 510080China School of Pharmacy Guangdong Pharmaceutical UniversityGuangzhouGuangdong 510006China Guangdong Provincial Key Laboratory of Digestive Cancer Research The Seventh Affiliated Hospital of Sun Yat-sen UniversityShenzhenGuangdong 518107China

There are no approvedtherapeuticdrugs for nonalcoholic steatohepatitis(NASH)due to the many bottlenecks,including the lack of preclinical animal models that can perfectly mimic human NASH features,such as systemic metabolic disorders,hepatic steatosis,intense liver inflammation and fibrosis,liver tumorigenesis,and cardiovascularcomplications.i,2"Pigment"epitheliumderived factor(PEDF)is a lipid metabolism regulator with high expression in the liver,and its reduced expression in the liver is closely related to the development of nonalcoholic fatty liver disease(NAFLD).

关键词： inflammation PEDF hepatic

Fabricating Ru single atoms and clusters on CoP for boosted hydrogen evolution reaction

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Chinese Journal of Structural Chemistry 2023年第4期42卷 46-50页

作者： Xiaoqi Wang Jitang Zhang Zongpeng Wang Zhiping Lin shijie shen Wenwu Zhong School of Material Science and Engineering Taizhou UniversityTaizhou318000China

Single atom catalysts(SATs)process the highest utilization efficiency of noble metals.The synergistic effect of noble single atoms and clusters,however,is insufficiently explored.In this work,Ru single atoms and clusters are fabricated on CoP substrate simultaneously,using a facile synchronous phosphorization method,with pre-prepared CoOOH and RuCl_(3)mixture as the raw materials.It is demonstrated that strong charge transfer is established between Co and Ru elements,which leads to electron-sufficient Ru sites.As a result,the Ru species decorated CoP exhibits excellent electrocatalytic activity for HER,with an overpotential of 32 mV to afford a current density of 10 mA/cm^(2)and a Tafel slope of 37.6 mV/dec,much better than the pure CoP counterpart.This work provides insights into the exploration of synergistic effect of noble metal single atoms and clusters fabricated on transition metal phosphide substrate.

关键词： Single atom Cluster CoP Hydrogen evolution reaction

In-situ surface decoration of RuO_(2) nanoparticles by laser ablation for improved oxygen evolution reaction activity in both acid and alkali solutions

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Journal of Energy Chemistry 2021年第3期30卷 510-518页

作者： Zongpeng Wang Beibei Xiao Zhiping Lin shijie shen Aijiao Xu Zexin Du Yuchao Chen Wenwu Zhong School of Advanced Study Taizhou UniversityTaizhou 318000ZhejiangChina School of Pharmau and Material Engineering Taizhou UniversityTaizhou 318000ZhejiangChina School of Energy and Power Engineering Jiangsu University of Science and TechnologyZhenjiang 212003JiangsuChina

Improving the OER activity of noble metal-based materials is of profound importance to minimize the usage of noble metals and lower the cost.Here,we report considerable improvement on the catalytic activity of RuO_(2) particles for OER in both alkali and acid environments.The RuO_(2) nanoparticles were treated with a method of pulse laser ablation.Numerous Ru and RuO_(2) clusters were generated at the surface of RuO_(2) nanoparticles after the laser ablation,forming a lychee-shaped morphology.The larger pulse energy RuO_(2) nanoparticles are treated with,the better the OER activity can be.DFT calculations shows that the surface tension induced by the lychee-shaped morphology benefits the OER performance.Our best sample gives an overpotential of 172 mV(at 10 mA cm^(-2))and a Tafel slope of 53.5 mV dec^(-1) in KOH,while an overpotential of 219 mV and a Tafel slope of 44.9 mV dec^(-1) in H_(2)SO_(4),which are of topclass results.This work may inspire a new way to develop high-performance electrocatalysts for OER.

关键词： Oxygen evolution reaction Laser ablation RuO_(2)

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特大型水电上冠运输工装设计与运用

中国重型装备 2024年第1期 14-18页

作者：陈岗申世杰中国第二重型机械集团德阳万路运业有限公司四川德阳618000

针对解决白鹤滩水电站特大型上冠运输难题,阐述专用旋转工装的设计过程及相关验算,并对工装的运用效果加以说明,同时比较了与前期其他运输单位类似工装的优缺点,通过重新设计及运用验证,为今后同类大型设备的山区运输工装的设计提供了... 详细信息

针对解决白鹤滩水电站特大型上冠运输难题,阐述专用旋转工装的设计过程及相关验算,并对工装的运用效果加以说明,同时比较了与前期其他运输单位类似工装的优缺点,通过重新设计及运用验证,为今后同类大型设备的山区运输工装的设计提供了新思路。

关键词：特大型水电上冠运输工装旋转设计

人工智能技术在发育性髋关节发育不良诊疗中的应用进展

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中华骨科杂志 2024年第5期44卷 329-335页

作者：沈宗旺廖世杰丁晓飞李秀东赵劲民广西医科大学第一附属医院创伤骨科手外科南宁530021

发育性髋关节发育不良(developmental dysplasia of the hip,DDH)为髋臼和股骨头位置和形态异常的发育性疾病。DDH是儿童最常见的髋部疾病之一,且其发病始于婴幼儿,髋关节解剖结构复杂,临床大规模诊筛工作存在工作量大、误诊率及漏诊率... 详细信息

发育性髋关节发育不良(developmental dysplasia of the hip,DDH)为髋臼和股骨头位置和形态异常的发育性疾病。DDH是儿童最常见的髋部疾病之一,且其发病始于婴幼儿,髋关节解剖结构复杂,临床大规模诊筛工作存在工作量大、误诊率及漏诊率较高以及外科手术有较长的学习曲线等问题。人工智能是用于研究、开发能够模拟人类智能的理论、方法、技术及应用系统的新兴技术科学,主要目标是使机器能够完成需要人类智能的复杂任务。目前人工智能技术在DDH的诊疗方面主要应用于:人工智能结合X线片或超声对DDH进行诊断及筛查,可能一定程度上避免主观性,提高诊断及筛查的准确性;在髋臼周围截骨术和全髋关节置换术的术前规划中,能够更为精确地追踪骨块的位置和设计假体部件的尺寸,使手术规划更加精准;3D导航系统、手术机器人、机械臂等人工智能技术有助于提高手术的准确性和安全性。人工智能具有简便快捷、可重复性高及深度学习能力等特点,一定程度上为DDH诊疗节省了人力物力及时间成本,便于医务工作者共享DDH诊疗经验以及减轻患者、家庭、社会及国家的负担。人工智能在DDH诊疗中的应用日趋广泛,但目前对人工智能在DDH筛查方面仍处于初步阶段,人工智能技术在DDH保髋治疗及其他术式中的应用也鲜有报道,对人工智能在DDH保守治疗、术后并发症和预后预测等方面研究不足。现阶段人工智能在DDH中的应用中仍有一定的局限性,包括图像数据质量难以把控、技术研发及推广难度大、缺少法律法规监管等问题。

关键词：人工智能发育性髋关节发育不良诊断临床方案

基于近红外光谱的脑组织氧监测系统研发与验证

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中国医学物理学杂志 2024年第7期41卷 876-882页

作者：蔡世杰李翰林沈昭于辉叶继伦张旭深圳市生物医学工程重点实验室广东深圳518060 深圳大学医学部生物医学工程学院广东深圳518060 广东宝莱特医疗技术研究院有限公司广东珠海519080

结合修正Lambert-Beer定律和空间分辨光谱技术,提出一种基于三波长的脑组织氧饱和度监测系统。搭建脑组织氧饱和度(rSO2)测量平台,从光谱稳定性和本底噪声验证系统可靠性,建立受控低氧试验并招募18名志愿者,研究rSO2随吸入氧阶梯平台变... 详细信息

结合修正Lambert-Beer定律和空间分辨光谱技术,提出一种基于三波长的脑组织氧饱和度监测系统。搭建脑组织氧饱和度(rSO2)测量平台,从光谱稳定性和本底噪声验证系统可靠性,建立受控低氧试验并招募18名志愿者,研究rSO2随吸入氧阶梯平台变化的趋势以及rSO2与动脉血氧饱和度之间的关系。结果表明,该测量系统可以有效监测rSO2,测试结果符合测量要求。受控低氧序列中,随吸入氧浓度下降,rSO2均呈下降趋势,且个体rSO2与动脉血氧饱和度具有较高的相关性。

关键词：脑组织氧饱和度动脉血氧饱和度近红外光谱空间分辨光谱法受控低氧实验

响应面法优化深共晶溶剂催化制备己二酸二异辛酯

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工程塑料应用 2024年第4期52卷 148-153页

作者：徐世洁胡志泉沈国良郑荣荣温瑞阳刘岳雷沈阳工业大学石油化工学院辽宁辽阳111003

深共晶溶剂作为新一代绿色溶剂,因合成纯化工艺简单、原料成本低、可再生、生物相容性好等特点而受到科技界的广泛关注。以对甲苯磺酸-甜菜碱制备的深共晶溶剂作为反应溶剂兼催化剂,催化合成增塑剂己二酸二异辛酯(DOA),解决传统催化剂... 详细信息

深共晶溶剂作为新一代绿色溶剂,因合成纯化工艺简单、原料成本低、可再生、生物相容性好等特点而受到科技界的广泛关注。以对甲苯磺酸-甜菜碱制备的深共晶溶剂作为反应溶剂兼催化剂,催化合成增塑剂己二酸二异辛酯(DOA),解决传统催化剂的循环使用问题。采用响应面法,选取醇酸物质的量比、催化剂物质的量比和反应温度三个因素,以酯化率为响应值,利用Box-Behnken设计分析了各因素及其交互作用对酯化率的影响,得到了多项式回归方程模型。结果表明,最佳试验条件为醇酸物质的量比为3.217、催化剂物质的量比为2.310和反应温度为117.7℃。在该条件下,合成DOA的酯化率可以达到88.21%,与模型预测值(92.112%)接近。表明响应面法优化了深共晶溶剂催化合成DOA的工艺参数,具有较高的准确性和有效性。此外,该深共晶溶剂在循环测试8次后,酯化率仍保持在80%左右。经傅里叶变换红外光谱仪和核磁共振氢谱仪进行结构表征分析确定产物为DOA。

关键词：深共晶溶剂催化剂酯类增塑剂酯化绿色合成响应面法

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基于GIS的海宁市输电线路及通道管理系统

农村电气化 2024年第2期 47-49,54页

作者：王大健李仕杰周靖沈逸佳国网浙江省电力有限公司海宁市供电公司浙江海宁314400 嘉兴明绘信息科技有限公司浙江嘉兴314000 嘉兴数科测绘科技有限公司浙江嘉兴314000

针对众多的输电线路,如何快速了解线路的路径走向、电压等级等台账信息;如何快速识别输电线路通道内的鸟巢、树障、人工建筑物等危险点信息;如何把输电线路信息高效、安全共享给线路设计等部门;如何快速更新输电线路通道状态信息。针对... 详细信息

针对众多的输电线路,如何快速了解线路的路径走向、电压等级等台账信息;如何快速识别输电线路通道内的鸟巢、树障、人工建筑物等危险点信息;如何把输电线路信息高效、安全共享给线路设计等部门;如何快速更新输电线路通道状态信息。针对上述问题,利用GIS技术、信息技术和无人机、地物智能判别等融合手段,构建基于GIS的海宁市输电线路通道管理系统,通过此系统可极大提高输电线路管理效率和实现通道内危险物的自动识别、预警,以保证通道安全。

关键词： GIS 通道管理地物识别输电线路