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La2O3掺杂对Zn–Pr基压敏陶瓷电学特性的影响

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硅酸盐学报 2020年第3期48卷 337-342页

作者：刘建科徐亚宁曹文斌张瑞婷宋帆谢鑫乔毅楠陕西科技大学文理学院西安710021 陕西科技大学材料科学与工程学院西安710021 半导体材料与器件研究中心西安710021

利用固相烧结法制备出了ZnO–Pr6O11–Co2O3–Cr2O3–La2O3氧化锌压敏陶瓷。研究了La2O3掺杂对氧化锌压敏陶瓷微观结构、压敏特性以及介电性能等方面的影响。结果表明:在La2O3掺杂量为1.5%(摩尔分数)时,氧化锌压敏陶瓷的综合性能最好,... 详细信息

利用固相烧结法制备出了ZnO–Pr6O11–Co2O3–Cr2O3–La2O3氧化锌压敏陶瓷。研究了La2O3掺杂对氧化锌压敏陶瓷微观结构、压敏特性以及介电性能等方面的影响。结果表明:在La2O3掺杂量为1.5%(摩尔分数)时,氧化锌压敏陶瓷的综合性能最好,其晶粒尺寸最小且较为均匀,击穿场强达到最高(752 V/mm),非线性系数较大(12),晶界电容达到最大(276 pF),介电损耗较小。

关键词：氧化镧掺杂氧化锌压敏陶瓷非线性系数阻频特性介电特性

中国新疆生态变迁——揭示气候变化对植被动态的影响

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Journal of Geographical Sciences 2024年第6期34卷 1039-1064页

作者：郝海超姚俊强陈亚宁徐建华李稚段伟利萨达夫-伊斯梅尔王桂玲 Key Laboratory of Geographic Information Science(Ministry of Education) School of Geographic SciencesEast China Normal UniversityShanghai200241China Graduate School of Advanced Integrated Studies in Human Survivability Kyoto UniversityYoshida-Nakaadachi 1Sakyo-kuKyoto 606-8306Japan Field Scientific Experiment Base of Akdala Atmospheric Background Institute of Desert MeteorologyChina Meteorological AdministrationUrumqi 830011China State Key Laboratory of Desert and Oasis Ecology Key Laboratory of Ecological Safety and Sustainable Development in Arid LandsXinjiang Institute of Ecology and GeographyCASUrumqi 830011China School of Geographic Science Nantong UniversityNantong 226007JiangsuChina

For the past several decades, climate change has been driving vegetation dynamics in arid regions worldwide. This study investigates vegetation dynamics and their links to climate from 1990 to 2020 in Xinjiang, China, using data from 30-m resolution land use and cover change, remote sensing, and climate reanalysis. Our approach encompasses a range of analytical techniques, including transfer matrix analysis, modeling, correlation, regression,and trend analysis. During the study period, there were major vegetation conversions from grassland to forestland in the mountains, and from cropland to grassland in the plains. Climate change emerged as an important trigger of these changes, as evidenced by the increase in net primary productivity in most vegetation types, except for cropland-grassland and grassland-cropland conversions. Precipitation and soil moisture were the most influential climatic factors, contributing 15.1% and 15.2%, respectively, to natural vegetation *** study also found that evapotranspiration serves as a key mechanism for moisture dissipation in the hydrological cycle of vegetation dynamics. The interplay between precipitation,soil moisture, and evapotranspiration is a critical pattern of climatic influence that shapes vegetation dynamics across zones of intersection, increase, decrease, and change. These insights are invaluable for informing vegetation conservation and development strategies in Xinjiang and other similar environments facing climate-driven ecological transitions.

关键词： climate change ecological transitions LUCC NPP efficiency vegetation dynamics Xinjiang

Enhanced simultaneous absorption of NO_(x) and SO_(2) in oxidation-reduction-absorption process with a compounded system based on Na_(2)SO_(3)

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Journal of Environmental Sciences 2022年第1期34卷 1-10页

作者： Sichao Li Wenjun Huang Haomiao xu Kai Liu Jia-nan Wang yaning Sun Zan Qu Naiqiang Yan School of Environmental Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Jinan Motor Vehicle Pollution Prevention and Control Center(Jinan Ecological Environment Information Center) Jinan 250000China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

Oxidation of sulfite and competitive absorption existed in Na_(2)SO_(3) solution for simultaneous removal of NO_(x) and SO_(2),inhibited the long-term high-efficiency when used for practical applications.A matching strategy was developed to solve these *** combination was used to retard the oxidation of antioxidant and enhance inhibition of S(IV)(tetravalent sulfur)***(HQ)and sodium thiosulfate(ST)showed a positive synergistic effect on inhibition of S(IV)*** SO_(2) concentration was 500 and 2000 ppmV,the addition of 0.1 wt.%HQ and 1 wt.%ST decreased the percentage of S(IV)oxidized by oxygen by over 30%and 40%,***(Na_(2)CO_(3))alleviated the competitive absorption between NO_(x) and SO_(2).Moreover,Na_(2)CO_(3) exhibited an enhancement effect on the absorption of NO_(x) and SO_(2) when coupled with *** the increase of oxygen pressure accelerated the oxidation of S(IV),the anti-oxidants can retard the *** measurement of pH suggested the removal efficiency of NO_(x) highly depended on SO_(3)^(2-) concentration rather than *** further investigation of the mechanism suggested the match effect was related to the interaction between ST and the intermediate product of *** match strategy holds a potential for application of SO_(3)^(2-) to denitration.

关键词： Denitration Non-ferrous metal smelting flue gas Oxidation inhibition Oxidation-reduction-absorption Synergistic effect

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树脂灌封电力电子电容器耐湿热性能的研究

电力电容器与无功补偿 2019年第3期40卷 74-78页

作者：黄云锴储松潮潘焱尧梁志奋徐建忠徐亚宁齐青徐飞安徽铜峰电子股份有限公司安徽铜陵244000 上海维邦化学品有限公司上海201619

通过对树脂灌封的电力电子电容器灌封材料改性,提高环氧树脂阻隔性和与其他材料的结合力,同时对电容器的结构设计进行改进,减少水汽侵入,解决其在风能光伏等领域使用中的耐湿热问题。通过湿热耐久性试验和长时湿热耐久试验对改进后的电... 详细信息

通过对树脂灌封的电力电子电容器灌封材料改性,提高环氧树脂阻隔性和与其他材料的结合力,同时对电容器的结构设计进行改进,减少水汽侵入,解决其在风能光伏等领域使用中的耐湿热问题。通过湿热耐久性试验和长时湿热耐久试验对改进后的电容器进行试验验证。改进后的电容器通过长时湿热耐久性试验,保证圆柱形电力电子电容器在严酷的环境中安全可靠地运行。

关键词：电力电子电容器树脂灌封湿热耐久试验

输入饱和下AUV自适应神经网络预设性能控制

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水下无人系统学报 2024年第2期32卷 376-382页

作者：徐文峰刘加朋于金鹏韩亚宁青岛大学自动化学院山东青岛266071 山东省工业控制技术重点实验室山东青岛266071

针对自主水下航行器(AUV)系统不确定性及输入饱和问题,提出了一种改进的自适应神经网络预设性能控制策略,完成对期望轨迹的跟踪。首先,引入非线性变换,使位置误差始终处在预设时变范围内,提高了控制精度,并基于反步法和Lyapunov函数设... 详细信息

针对自主水下航行器(AUV)系统不确定性及输入饱和问题,提出了一种改进的自适应神经网络预设性能控制策略,完成对期望轨迹的跟踪。首先,引入非线性变换,使位置误差始终处在预设时变范围内,提高了控制精度,并基于反步法和Lyapunov函数设计系统虚拟控制律;然后,利用神经网络技术处理系统模型未知参数,并重构系统真实控制律,使传统反步控制策略得以简化,有效降低了计算复杂度,并在Lyapunov稳定性理论的基础上,证明了AUV系统的误差信号均有界;最后,与传统动态面控制方法进行对比,仿真结果表明所提出的控制策略控制性能更好,在考虑输入饱和情况下可有效克服不确定性对系统性能的影响,实现对目标轨迹的有效跟踪。

关键词：自主水下航行器神经网络反步控制轨迹跟踪

Porous bio-high entropy alloy scaffolds fabricated by direct ink writing

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Journal of Materials Science & Technology 2023年第26期157卷 21-29页

作者： Guangbin Zhao Xiaoxi Shao Qingxian Zhang Yanlong Wu yaning Wang xu Chen Hang Tian Yaxiong Liu Yanpu Liu Bingheng Lu State Key Laboratory for Manufacturing System Engineering School of Mechanical EngineeringXi’an Jiaotong UniversityXi’an 710054China State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases and Shaanxi Clinical Research Center for Oral Diseases Department of Oral and Maxillofacial SurgerySchool of StomatologyThe Fourth Military Medical UniversityXi’an 710032China School of Mechatronic Engineering and Automation Foshan UniversityFoshan 528000China Ji Hua Laboratory Foshan 528200China College of Mechanical Engineering Xi’an University of Science and TechnologyXi’an 710054China

Porous tantalum-titanium-niobium-zirconium(Ta-Ti-Nb-Zr)bio-high entropy alloy(bioHEA)scaffolds are fabricated using direct ink writing 3D printing technology in this study.A composite ink is prepared using four metal powders as raw materials:Ta,Ti,Nb and *** extrusion is used to build 3D scaf-folds with interconnected porous structures at room temperature,which are then sintered in a vacuum *** interdiffusion of metal elements yields porous bioHEA scaffolds with a body-centered cubic(BCC)*** fabricated scaffolds have uniform compositions with a significant alloying ef-fect and good *** scaffolds have a compressive strength of 70.08-149.95 MPa and an elastic modulus of 0.18-0.64 GPa,indicating that the mechanical properties can be controlled over a wide *** scaffolds have a compressive strength close to that of human cortical bone and thus meet the requirements for porous structure characteristics and biological and mechanical properties of orthopedic implants.

关键词： Direct ink writing Bio-high entropy alloy Porous scaffolds Sintering Biocompatibility Orthopedic applications

参萸顿咳方结合益生菌治疗小儿百日咳效果研究

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辽宁中医杂志 2024年第5期51卷 87-90页

作者：张艳文李春梅刘振奎卢艳辉高娇娇曹燕玲许丽菲河北北方学院附属第一医院儿科河北张家口075000

目的观察参萸顿咳方结合益生菌辅助治疗小儿百日咳临床效果。方法将该院儿科收治的98例百日咳患儿(2019年4月—2022年4月)纳入该次试验研究,并以随机数字表法将患儿分为对照组(49例)与观察组(49例)两组,对照组患儿益生菌(双歧杆菌四联... 详细信息

目的观察参萸顿咳方结合益生菌辅助治疗小儿百日咳临床效果。方法将该院儿科收治的98例百日咳患儿(2019年4月—2022年4月)纳入该次试验研究,并以随机数字表法将患儿分为对照组(49例)与观察组(49例)两组,对照组患儿益生菌(双歧杆菌四联活菌片)治疗,观察组患儿在对照组治疗基础上结合参萸顿咳方治疗,数据观察:临床疗效、肺部啰音消失时间及痉咳改善时间、治疗前后中医证候积分(咳嗽、面色青灰、眼睑浮肿、鼻衄舌红、舌下生疮等)变化、血清肠黏膜屏障相关因子乳脂球表皮生长因子-8(MFG-E8)及D-乳酸(D-LA)水平变化、免疫球蛋白(IgA、IgG、IgM)指标变化、不良反应。结果观察组患儿治疗总有效率(95.92%,47/49)比对照组患儿(83.67%,41/49)更高,差异有统计学意义(P0.05,治疗后各组患者中医证候积分(咳嗽、面色青灰、眼睑浮肿、鼻衄舌红、舌下生疮等)、MFG-E8及D-LA水平、IgA、IgG、IgM均好转,治疗后观察组患儿中医证候积分(咳嗽、面色青灰及眼睑浮肿、鼻衄舌红、舌下生疮等)、MFG-E8及D-LA水平、IgA、IgG、IgM等指标优于对照组,P<0.05;两组患儿均未见严重肝肾功能异常等不良反应。结论参萸顿咳方结合益生菌辅助治疗治疗小儿百日咳效果显著,可较好促进患儿肠道功能,提升患儿免疫功能,患儿症状改善,恢复快,且安全可靠,值得应用。

关键词：小儿百日咳参萸顿咳方益生菌疗效肠道功能

Solvent Extraction Study of Protactinium（Ⅴ with Methyl-iso-butyl Carbinol and Methyl-iso-butyl Ketone

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近代物理研究所和兰州重离子加速器实验室年报：英文版 2007年第1期 54-54页

作者： Ding Huajie Niu yaning Yang Weifan xu Yanbin Yuan Shuanggui Qin Zhi Wu Xiaolei

Dental plaque-inspired versatile nanosystem for caries prevention and tooth restoration

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Bioactive Materials 2023年第2期20卷 418-433页

作者： Yue xu Yuan You Luyao Yi Xiaoyi Wu yaning Zhao Jian Yu He Liu Ya Shen Jingmei Guo Cui Huang The State Key Laboratory Breeding Base of Basic Science of Stomatology(Hubei-MOST)&Key Laboratory for Oral Biomedical Ministry of Education School&Hospital of StomatologyWuhan UniversityWuhanChina Division of Endodontics Faculty of DentistryThe University of British Columbi1Canada

Dental caries is one of the most prevalent human diseases resulting from tooth demineralization caused by acid production of bacteria *** remains challenges for current practice to specifically identify,intervene and interrupt the development of caries while restoring *** this study,inspired by natural dental plaque,a stimuli-responsive multidrug delivery system(PMs@NaF-SAP)has been developed to prevent tooth decay and promote enamel *** spherical core-shell structures of micelles dual-loaded with antibacterial and restorative agents are self-assembled into bacteria-responsive multidrug delivery system based on the pH-cleavable boronate ester bond,followed by conjugation with salivary-acquired peptide(SAP)to endow the nanoparticle with strong adhesion to tooth *** constructed PMs@NaF-SAP specifically adheres to tooth,identifies cariogenic conditions and intelligently releases drugs at acidic pH,thereby providing antibacterial adhesion and cariogenic biofilm resistance,and restoring the microarchitecture and mechanical properties of demineralized *** treatment with PMs@NaF-SAP effectively diminishes the onset and severity of caries without impacting oral microbiota diversity or surrounding mucosal *** findings demonstrate this novel nanotherapy has potential as a promising biomedical application for caries prevention and tooth defect restoration while resisting biofilm-associated diseases in a controlled manner activated by pathological bacteria.

关键词： Biofilms Dental caries Micelles Peptide Stimuli responsive polymers Tooth remineralization