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Photoluminescence properties of Tm^(3+)/Tb^(3+)/Sm^(3+) tri-doped Na_(5)Y_(9)F_(32) single crystal with high thermal stability for white light-emitting diodes

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Journal of Rare Earths 2021年第5期39卷 512-519页

作者： Yang Qiao Xiong Zhou Jianli Zhang Haiping Xia hongwei song Baojiu Chen Key Laboratory of Photo-electronic Materials Ningbo UniversityNingbo 315211China State Key Laboratory on Integrated Optoelectronics College of Electronic Science and Engineering and College of PhysicsJilin UniversityChangchun 130012China Department of Physics Dalian Maritime UniversityDalian 116026China

A novel Tm^(3+)/Tb^(3+)/Sm^(3+)tri-doped Na_(5)Y_(9)F_(32)single crystal was synthesized by a modified Bridgman method for the propose of white light emitting *** fluorescence spectra of various Sm^(3+)ion concentrations and fixed 0.4 mol%Tm^(3+)and 0.5 mol%Tb^(3+)were measured and studied systematically excited by near-ultraviolet light of 355 *** Sm3+ion concentration takes apparent effect on the relative intensity of peaks in the visible region and the color coordinate combining from these emission bands.A near pure white light emission with color coordinates(0.3295,0.3057)and color temperature(5657 K)can be obtained when the concentrations of Tm^(3+),Tb^(3+)and Sm^(3+)ions are 0.4 mol%,0.5 mol%and 0.8 mol%,***,the practical down-conversion internal quantum yield was measured by integrating spheres at about 14.39%.The tri-doped Na_(5)Y_(9)F_(32)single crystal shows a high thermal stability inferring from the temperature dependent emission in which the integrated emission intensities are reduced only by^3%with the increase of temperature from 280 to 450 *** present results demonstrate that the Tm^(3+)/Tb^(3+)/Sm^(3+)tri-doped Na_(5)Y_(9)F_(32)single crystal may provide a promising candidate for white light-emitting diodes,luminescent materials and fluorescent display devices.

关键词： Na_(5)Y_(9)F_(32)single crystal Tm^(3+)/Tb^(3+)/Sm^(3+) Bridgman method White light emission Rare earths

Nonlinear thermo-structural behavior of sandwich panels with truss cores under through-thickness gradient temperature field

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Theoretical & Applied Mechanics Letters 2018年第3期8卷 184-192页

作者： Wu Yuan hongwei song Chenguang Huang Key Laboratory for Mechanics in Fluid Solid Coupling Systems Institute of Mechanics Chinese Academy of Sciences School of Engineering Science University of Chinese Academy of Sciences

A theoretical analysis is presented to predict the nonlinear thermo-structural response of metallicsandwich panels with truss cores under through-thickness gradient temperature field, which is acommon service condition for metallic thermal protection system （TPS）. The in-planetemperature distribution is assumed to be uniform, and through-thickness temperature field isdetermined by heat conduction. Two typical conditions are analyzed： nonlinear thermal bendingin fixed inside surface temperature, and thermal post-buckling in fixed temperature differencebetween two surfaces. Temperature-dependent mechanical properties are considered, andgradient shear stiffness and bending stiffness due to non-uniform temperature is included. Resultsindicate that the temperature-dependent material properties obviously affect bending resistance;however, the effect is negligible on post-buckling behavior. Influences of geometric parameters onthe thermo-structural behavior of the sandwich panel according to the present theoretical modelare discussed.

关键词： Sandwich panel with truss core Thermal protection system Thermo-structural response Nonlinear bending Post-buckling

吉尔吉斯斯坦塔什库梅尔地区油气地质特征及增储前景

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能源与环保 2024年第4期46卷 84-92页

作者：宋红伟余阳赵百顺河南省地质局矿产资源勘查中心河南郑州450000 中原能矿投资开发有限公司河南郑州450000

塔什库梅尔地区是吉尔吉斯石油天然气股份公司(KNG)旗下油气区块之一,属于低勘探程度区,由于接续勘查投入不足,导致剩余可采石油资源有限。为了延长油田服务年限,寻找区块内接替油气资源,在系统分析区域地质资料的基础上,根据盆地演化阶... 详细信息

塔什库梅尔地区是吉尔吉斯石油天然气股份公司(KNG)旗下油气区块之一,属于低勘探程度区,由于接续勘查投入不足,导致剩余可采石油资源有限。为了延长油田服务年限,寻找区块内接替油气资源,在系统分析区域地质资料的基础上,根据盆地演化阶段,对区块内沉积相特征以及构造形成和应力机制进行综合分析,总结出区块内油气圈闭类型及生、储、盖、移组合特征,并结合地震深度剖面解读,指出研究区可形成中下侏罗统—中侏罗统和古近系始新统—渐新统2套烃源岩,区内油气圈闭是以鼻状构造为主,在鼻状构造不同部位可进一步细分为褶皱型圈闭、褶皱—断裂型圈闭和褶皱—岩性型圈闭,并圈定了下一步工作重点及可能增储的区域。

关键词：沉积相特征构造分析圈闭类型增储塔什库梅尔

Flexible double narrowband near-infrared photodetector based on PMMA/core-shell upconversion nanoparticle composites

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Journal of Rare Earths 2022年第2期40卷 211-217,I0002页

作者： Ya’nan Ji Donglei Zhou Nan Wang Nan Ding Wen Xu hongwei song State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012China

Flexible narrowband near infrared(NIR)photodetectors(PDs)are urgently in demand in the fastdeveloping era of flexible electronics,due to their crucial roles in various innovative ***,we designed and synthesized the core-shell structured NaYF4:Yb^(3+),Er^(3+)@NaYF4:Nd^(3+)upconversion nanoparticles(UCNPs),which can be pumped by the 808 and 980 nm *** upconversion luminescence(UCL)are significantly enhanced after being assembled with the opal photonic crystals(OPCs)due to the photonic crystal effect,with 55 and 48 folds of enhancement factors under illuminations of 808 and 980 nm lights,*** on this hybrid,the flexible narrowband PDs were successfully fabricated on the PET substrate with the structure of OPCs/NaYF4:Yb^(3+),Er^(3+)@Nd^(3+)/MAPbl3,which displays excellent detection performance to double narrowband NIR light(808 and 980 nm)benefiting from the amplified UCL,with responsivity of 8.79 and 7.39 A/W,detectivity of 3.01×10^(11)and2.68×10^(11)cm·Hz^(1/2)/W for 808 and 980 nm lights detection respectively,along with short response time in the range of 120-160 ***,the OPCs/NaYF4:Yb^(3+),Er^(3+)@NaYF4:Nd^(3+)/MAPbI3 double narrowband PDs display low photodetection power threshold(0.05 W/cm2),outstanding flexibility,prominent moisture resistance,and good long-time *** work displays a new concept of narrowband NIR PDs,which open a new field for specific NIR light detections.

关键词： Upconversion luminescence Upconversion enhancement Narrow-band near-infrared photodetection Flexible photodetectors Rare earths

Microstructural evolution of carbon fiber reinforced SiC-based matrix composites during laser ablation process

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Journal of Materials Science & Technology 2019年第12期35卷 2919-2925页

作者： Xiaolin Dang Xiaowei Yin Xiaomeng Fan Yuzhao Ma Jiangtao Wang Panfei Ju hongwei song Science and Technology on Thermostructural Composite Materials Laboratory Northwestern Polytechnical UniversityXi'an 710072China Key Laboratory for Mechanics in Fluid-Solid Coupling Systems Institute of MechanicsChinese Academy of SciencesBeijing 100190China

In this work, four different carbon fiber reinforced SiC-based matrix composites(C/SiC) were prepared,and microstructure evolution during laser ablation process was characterized. Laser irradiation provided a special high-temperature environment up to 3500℃. For all four composites, different morphologies can be obtained in the transition region due to the oxidation of different matrices. While only needle-shaped carbon fiber and nanolayered carbon without any matrix remained in the central region, indicating that graphitization process occurred in the center, resulting from the high-temperature and low-oxygen environment in the laser process. Therefore, the laser ablation of C/SiC composites is controlled by chemical and physical erosion, and mainly by the physical erosion in the center.

关键词： Ablation performance C/SiC composite Laser ablation Mechanism

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智慧保护地管理云平台系统设计与研究

电气自动化 2024年第3期46卷 83-86页

作者：谷洁唐浩文宋宏伟刘楠国家林业和草原局西北调查规划院陕西西安710048 旱区生态水文与灾害防治国家林业局重点实验室陕西西安710048 西安数维智云测绘技术有限公司陕西西安710199

针对保护地数据收集较为困难、管理云平台的利用普遍低下等问题,对智慧保护地管理云平台系统进行设计与研究。采用分布式系统对智慧保护地管理云平台进行设计,其结构可分为感知层、网络层和应用层。感知层主要采用无人机遥感技术实现对... 详细信息

针对保护地数据收集较为困难、管理云平台的利用普遍低下等问题,对智慧保护地管理云平台系统进行设计与研究。采用分布式系统对智慧保护地管理云平台进行设计,其结构可分为感知层、网络层和应用层。感知层主要采用无人机遥感技术实现对保护地数据的采集;网络层在窄带物联网技术上增加一个定时节能模块,可在对采集到的信息传送时节省功耗;应用层主要是对数据存储进行设计,可避免产生冗余重复数据,节省数据空间,增强索引能力和响应速度。通过试验,验证了数据采集的完整度和帧图像分辨率的稳定性都较传统方法更为优越。管理云平台数据存储占用空间较传统方法少,且随着数据量的增加,增长幅度更为均匀。

关键词：智慧保护地管理云平台系统无人机遥感技术窄带物联网数据存储空间占用

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消化内镜黏膜下剥离术治疗早期食管癌的效果

世界复合医学 2024年第3期10卷 176-179页

作者：宫雪娟宋红伟王世恒陈鑫廷吉林省肿瘤医院内镜科吉林长春130021

目的分析在早期食管癌患者中应用消化内镜黏膜下剥离术的治疗效果。方法单纯随机选取2021年4月—2023年5月吉林省肿瘤医院收治的100例早期食管癌患者为研究对象,以随机信封法分为对照组(n=51,行内镜分片黏膜切除术)、观察组(n=49,行消... 详细信息

目的分析在早期食管癌患者中应用消化内镜黏膜下剥离术的治疗效果。方法单纯随机选取2021年4月—2023年5月吉林省肿瘤医院收治的100例早期食管癌患者为研究对象,以随机信封法分为对照组(n=51,行内镜分片黏膜切除术)、观察组(n=49,行消化内镜黏膜下剥离术)。对比两组围术期指标、并发症总发生率及病灶切除效果。结果观察组手术时间(56.47±6.37)min、术后禁食时间(1.98±0.42)d、住院时间(6.94±1.94)d,均短于对照组(70.25±7.36)min、(2.21±0.25)d、(7.94±2.04)d,差异有统计学意义(t=9.994、3.343、2.510,P均0.05)。观察组病灶整块切除率(93.88%)、病灶治愈性切除率(87.76%)均高于对照组(72.55%、70.59%),差异有统计学意义(χ^(2)=8.057、4.439,P均<0.05)。结论消化内镜黏膜下剥离术治疗早期食管癌,可缩短手术时间、术后禁食时间及住院时间,不会增加并发症发生率,安全性较高,且病灶切除效果更加显著。

关键词：早期食管癌内镜分片黏膜切除术消化内镜黏膜下剥离术围术期指标并发症

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Partial phase flow rate measurements for stratified oil-water flow in horizontal wells

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Petroleum Exploration and Development 2020年第3期47卷 613-622页

作者： song hongwei GUO Haimin GUO Shuai SHI Hangyu Ministry of Education Key Laboratory of Exploration Technologies for Oil and Gas Resources(Yangtze University) Yangtze UniversityWuhan 430100China Hubei Cooperative Innovation Center of Unconventional Oil and Gas Yangtze UniversityWuhan 430100China Tianjin Branch Logging Company Limited CNPC Tianjin 300280China

To accurately measure and evaluate the oil-water production profile of horizontal wells, a dynamic measurement experiment of oil-water two-phase flow in horizontal wells and numerical simulation were combined to establish a method for measuring the partial phase flow rate of oil-water two-phase stratified flow in horizontal wells. An experimental work was performed in horizontal oil-water two-phase flow simulation well using combination production logging tool including mini-capacitance sensor and mini-spinner. The combination tool provides a recording of holdup and velocity profiles at five different heights of the borehole cross-section. The effect of total flow rate and water-cut on the response of spinner and capacitive sensor at five measured positions were investigated. The capacitance water holdup interpolation imaging algorithm was used to determine the local fluid property and oil-water interface height, and the measured local fluid speed was combined with the numerical simulation result to establish an optimal calculation model for obtaining the partial phase flow rate of the oil-water two-phase stratified flow in the horizontal well. The calculated flow rates of five measured points are basically consistent with the experimental data, the total flow rate and water holdup from calculation are in agreement with the set values in the experiment too, suggesting that the method has high accuracy.

关键词： horizontal well oil-water two-phase flow stratified flow regime flow rate measurement fluid dynamics experiment production logging

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土鳖虫指纹图谱分析

中兽医医药杂志 2024年第4期43卷 62-66页

作者：吴卫东付美芳宋红卫岳立山东省菏泽市食品药品检验检测研究院山东菏泽274000

土鳖虫是一种动物类中药,入药部位为鳖蠊科昆虫地鳖Eupolyphaga sinensis Walker或冀地鳖Steleophaga plancyi Boleny的雌虫干燥体,而雄虫不能入药,为保证用药的安全性和有效性,需准确有效区分雌雄土鳖虫。本研究采用高效液相色谱法,色... 详细信息

土鳖虫是一种动物类中药,入药部位为鳖蠊科昆虫地鳖Eupolyphaga sinensis Walker或冀地鳖Steleophaga plancyi Boleny的雌虫干燥体,而雄虫不能入药,为保证用药的安全性和有效性,需准确有效区分雌雄土鳖虫。本研究采用高效液相色谱法,色谱柱采用Zafex Supperfex AQ-C_(18)柱(4.6 mm×250.0 mm,5μm),以甲醇为流动相A,以0.1%冰醋酸溶液为流动相B,梯度洗脱60 min,柱温30℃,检测波长248 nm,进样量10μL。结果显示,28批土鳖虫(雌虫)均呈现与土鳖虫对照药材相对应的8个特征峰色谱峰,以对照品指认了其中4个化学成分,分别为尿嘧啶、次黄嘌呤、黄嘌呤、鸟苷,且与土鳖虫雄虫的指纹图谱不匹配。该方法可以有效区分雌雄土鳖虫,有效避免掺伪情况发生,为土鳖虫质量控制提供了参考方法。

关键词：土鳖虫指纹图谱质量控制