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Composition and luminescence properties of highly robust green-emitting LuAG:Ce/Al_(2)O_(3)composite phosphor ceramics for high-power solid-state lighting

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Journal of Advanced Ceramics 2023年第3期12卷 625-633页

作者： Ziqiu Cheng Xin Liu Xinrong Chen Jian Xu Yanbin Wang Tengfei Xie Lexiang Wu Zhengfa dai guohong Zhou Jun Zou Jiang Li Transparent Ceramics Research Center Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 201899China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Lab of New Energy Materials and Devices School of Physics and Electronic InformationHenan Polytechnic UniversityJiaozuo 454000China School of Material Science and Engineering Jiangsu University301 Xuefu RoadZhenjiang 212013China Shanghai Institute of Technology Shanghai 201418China Institute of New Materials&Industrial Technology Wenzhou UniversityWenzhou 325024China

The major advantage of laser lighting over white light-emitting-diode is the possibility to achieve ultra-high ***,phosphors usually suffer laser-induced luminescence saturation,which limits the peak luminance of laser lighting *** aim of the present study is to develop LuAG:Ce/Al_(2)O_(3)composite ceramics(LACCs)with a high saturation threshold for high-luminance laser *** to the rigid crystal structure,proper synthetic process,and optimized thermal design,the LACCs possess small thermal quenching(16%loss in luminescence at 225℃),high quantum yield(>95%),and excellent luminescence *** the LACCs are irradiated by blue laser diodes in a reflection mode,a high luminous flux of 4634 lm and luminous efficacy of 283 lm·W^(−1)are ***,they show no sign of luminescence saturation even when the power density reaches 20.5 W·mm^(−2).With these favorable properties,the designed LACCs show great potential in high-luminance laser lighting.

关键词： LuAG:Ce/Al_(2)O_(3)composite ceramics(LACCs) luminescence saturation luminous efficacy high-luminance laser lighting

黑稻品种洋黑3号农艺性状及花青苷色素积累规律研究

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中国稻米 2019年第2期25卷 35-39页

作者：代国红周宝龙周佳王艳龙王光中牛森李成德闫建洲洋县黑米名特作物研究所陕西洋县723300 陕西省黑色有机食品工程技术研究中心陕西洋县723300 陕西双亚粮油工贸有限公司陕西汉中723300 陕西省水稻研究所陕西汉中723100 洋县农业局陕西洋县723300 洋县农业技术推广中心陕西洋县723300 洋县科学技术局陕西洋县723300

花青苷色素是黑稻种皮和颖壳呈色的主要物质,属植物多酚类化合物,具有抗氧化、改善微循环、改善视敏锐等多种作用。以洋县黑米名特作物研究所提供的黑稻品种洋黑3号为材料,研究了有效积温、海拔、播种时间等环境因子对黑稻颖果发育过程... 详细信息

花青苷色素是黑稻种皮和颖壳呈色的主要物质,属植物多酚类化合物,具有抗氧化、改善微循环、改善视敏锐等多种作用。以洋县黑米名特作物研究所提供的黑稻品种洋黑3号为材料,研究了有效积温、海拔、播种时间等环境因子对黑稻颖果发育过程中花色苷积累规律以及温度、海拔等外界环境因素对黑米产量、花色苷的影响。结果显示,花色苷在颖果果皮沉积具有时序性,黑稻花色苷积累是在乳熟期和蜡熟期,抽穗后2～4周是主要积累时段;气温过高不利于颖果着色,适度低温能延长颖果的着色时间;选择合适的播种期,使稻株的颖果生长期处于光照较强、平均气温在21℃～23℃、昼夜温差大的秋季,有利于产量增加和花色苷含量提升。洋黑3号适宜在海拔800 m以下的区域生长,海拔700 m以下的区域最佳。平川及海拔500 m以下地区种植,选择在4月中旬播种;海拔500～600 m种植区,选择在4月上旬后期播种;海拔600～700 m种植区,选择在4月上旬前期播种。

关键词：黑稻洋黑3号农艺性状花青苷色素产量

计算机RENAL程序测定S/L及食道通过时间

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核电子学与探测技术 1987年第1期 44-47页

作者：朱国泓黄玉琴戴希真葛炳生王忠植赵宝经马步成颜珏李晓鸣荣迅祝凯中日友好医院

RENAL程序是专用于γ照相机的电子计算机普遍采用的程序。主要是用它作肾图,将左、右肾作动态显象,在综合影象上框以感兴趣区(ROI),计算并显示左、右肾各自的四个指标:最大计数(MAXCT),半计数(0.5CT),峰时(TMAX)及注射后最大计数下降一... 详细信息

RENAL程序是专用于γ照相机的电子计算机普遍采用的程序。主要是用它作肾图,将左、右肾作动态显象,在综合影象上框以感兴趣区(ROI),计算并显示左、右肾各自的四个指标:最大计数(MAXCT),半计数(0.5CT),峰时(TMAX)及注射后最大计数下降一半时间门(T(1/2))。最后呈两肾各自的时间-强度曲线,及在同一坐标上的两条曲线。如分别在肝、脾上框以ROI来代替双肾,运用RENAL程序,则便获得肝、脾摄取曲线,计算出牌肝集积比(S/L)。我们在108位正常人和肝病、血液病患者中用此

关键词：肾图程序脾肝集积比食道通过时间时间-强度曲线

Alteration of Intestinal Archaeal Community Composition in Broilers with Different Growth Rates

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Animal Husbandry and Feed Science 2017年第6期9卷 355-359,362页

作者： Gui guohong Xiao Yingping dai Baoling Chen Xiaomin Yang Hua Xu E College of Animal Sciences Guizhou University Institute of Quality and Standard for Agro-products Zhejiang Academy of Agricultural Sciences

The gastrointestinal tract, as the major digestive and absorbing organ, plays an important role in chicken growth. Numerous studies have been undertaken to investigate the gut bacterial community in broilers, but little is known about the archaeal community composition. To improve our understanding of the composition of intestinal archaea and the relationship between archaea and chicken growth, a feeding trial was conducted with 10 000 Ross 308 chicks in a commercial production facility under standard management. At 38 d of age, 15 birds with the highest body weight （ H group）, 15 birds with average body weight （ M group）, and 15 birds with the lowest body weight （ L group） were selected among 600 healthy male individuals. Cecal archaeal community was detected based on 16S rRNA gene sequencing. As a result, 3 321 229 archaeal sequences were clustered into 1 281 operational taxonomic units （OTUs） and classified into three phyla （Crenarchaeola, Euryarchaeota and Thaumarchaeota） and six known genera ： Natronomonas, Halolamina, Salinarchaeum, Cenarchaeum, Candidatus, Nitrosoarchaeum and Nitrososphaera. The alpha indices showed that, the richness of archaea in L group was the highest, and followed by that in M group and H group, while the archaea in H group were more diverse, followed by those in M group and L group. However, the archaeal composition in all chicken samples was similar, with the vast majority of the sequences belonging to Cenarchaeum, and only a few belonging to the other five genera.

关键词： Broiler chicken Intestine Archaea composition 16S rRNA

Achieving ultrahigh electrochemical performance by surface design and nanoconfined water manipulation

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National Science Review 2022年第6期9卷 143-152页

作者： Haisheng Li Kui Xu Pohua Chen Youyou Yuan Yi Qiu Ligang Wang Liu Zhu Xiaoge Wang guohong Cai Liming Zheng Chun dai Deng Zhou Nian Zhang Jixin Zhu Jinglin Xie Fuhui Liao Hailin Peng Yong Peng Jing Ju Zifeng Lin Junliang Sun College of Chemistry and Molecular Engineering Beijing National Laboratory for Molecular Sciences Peking University Key Laboratory of Flexible Electronics and Institute of Advanced Materials Jiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing Tech University Core Labs King Abdullah University of Science and Technology Electron Microscopy Centre of Lanzhou University Lanzhou University School of Chemical and Environmental Engineering China University of Mining and Technology State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences Analytical Instrumentation Center Peking University School of Physical Science and Technology Electron Microscopy Centre of Lanzhou University and Key Laboratory of Magnetism and Magnetic Materials of the Ministry of Education Lanzhou University College of Materials Science and Engineering Sichuan University

The effects of nanoconfined water and the charge storage mechanism are crucial to achieving the ultrahigh electrochemical performance of two-dimensional transition metal carbides(MXenes). We propose a facile method to manipulate nanoconfined water through surface chemistry modification. By introducing oxygen and nitrogen surface groups, more active sites were created for Ti3C2MXene, and the interlayer spacing was significantly increased by accommodating three-layer nanoconfined water. Exceptionally high capacitance of 550 F g-1(2000 F cm-3) was obtained with outstanding high-rate performance. The atomic scale elucidation of the layer-dependent properties of nanoconfined water and pseudocapacitive charge storage was deeply probed through a combination of ‘computational and experimental microscopy’. We believe that an understanding of, and a manipulation strategy for, nanoconfined water will shed light on ways to improve the electrochemical performance of MXene and other two-dimensional materials.

关键词： two-dimensional material MXene nanoconfined water energy storage mechanism supercapacitors

单光束飞秒激光诱导的电子态密度分布对双周期纳米光栅的影响

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光学学报 2016年第5期36卷 105-111页

作者：公民戴晔宋娟马国宏上海大学理学院上海200444 江苏大学材料科学与工程学院江苏镇江212013

研究了不同脉冲能量下1kHz飞秒激光脉冲在石英玻璃内部诱导的损伤痕迹、纳米光栅结构及其双折射特性,发现在激光辐照区域顶端形成的微纳结构具有两种周期性:沿光传输方向的周期为ΛK;沿激光偏振方向的周期为ΛE.通过数值模拟飞秒脉冲在... 详细信息

研究了不同脉冲能量下1kHz飞秒激光脉冲在石英玻璃内部诱导的损伤痕迹、纳米光栅结构及其双折射特性,发现在激光辐照区域顶端形成的微纳结构具有两种周期性:沿光传输方向的周期为ΛK;沿激光偏振方向的周期为ΛE.通过数值模拟飞秒脉冲在石英玻璃内部的传输过程,研究了入射能流密度分布及自由电子密度分布对双周期纳米光栅结构的影响.结果表明,较大的入射能流密度有利于纳米光栅的形成,且产生的电子密度会影响周期ΛK,电子密度越大,周期ΛK越大.从理论上分析了双周期纳米光栅结构的形成过程,认为等离子体非对称生长及其引起的局域场强分布影响了双周期纳米光栅结构的形成.

关键词：激光光学飞秒激光纳米光栅微加工等离子体

《2023国际肝癌协会肝细胞癌风险分层和监测白皮书》摘译

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中华消化杂志 2024年第4期44卷 217-222页

作者：代维韩国宏西安国际医学中心医院消化内科西安710100

多数关于肝癌的研究致力于提高肝细胞癌监测的效力和有效性。与其他癌症一样,监测旨在早期诊断和根治性治疗,降低肝细胞癌相关病死率。肝细胞癌监测的证据支持源于一项乙型肝炎病毒感染患者的大型随机对照试验研究和几项肝硬化患者的队... 详细信息

多数关于肝癌的研究致力于提高肝细胞癌监测的效力和有效性。与其他癌症一样,监测旨在早期诊断和根治性治疗,降低肝细胞癌相关病死率。肝细胞癌监测的证据支持源于一项乙型肝炎病毒感染患者的大型随机对照试验研究和几项肝硬化患者的队列研究。然而,在临床实践中,监测的有效性受限于各种阻碍,包括风险分层不恰当、实施力度不足、筛查工具准确性欠佳等。为解决这些问题,在此提出以下几个提议:开发新的风险分层算法和生物标志物以更好识别高危个体;加强监测策略的落实;开发灵敏度和特异度更高的影像学和血液学监测工具。新的监测策略不仅需要临床验证,还需要证实其临床实用性,即能否提高早癌的发现率,降低相关病死率。如上述问题得以解决,则可推进精准筛查模式,依据个体肝细胞癌风险制定监测策略,使监测价值最大化。然而,在设计和验证时,必须考虑到实际和协调安排问题。国际肝癌协会就以上问题于2022年6月举办了肝细胞癌风险分层和监测的单一主题研讨会。在此,特呈出这份白皮书,内容包括该领域的现状、正在进行的研究,以及新兴策略转化的阻碍。

关键词：癌,肝细胞监测风险分层筛查生物标志物

Generation of femtosecond dual pulses by a transverse standing wave in a volume holographic grating

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Chinese Optics Letters 2019年第11期17卷 91-95页

作者： Xiaoyan Wang Xiaona Yan Kailong Jin Ye dai Zuanming Jin Xihua Yang guohong Ma Physics Department of Science College Shanghai UniversityShanghai 200444China

Based on Kogelnik’s coupled-wave theory, it is found that when a femtosecond pulse is incident on a transmitted volume holographic grating, two transverse standing waves along the grating vector direction will be generated inside the volume holographic grating(VHG). Due to field localization of two standing waves, they have two different velocities along the propagation depth. On the output plane of the VHG, femtosecond dual pulses are generated in both the diffracted and transmitted directions. Results show that the pulse interval is determined by the refractive index modulation and thickness of the grating, while the waveform of the dual pulses is independent of the grating parameters.

关键词： femtosecond pulse holographic

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Hessian商方程具有渐近性质的整体解

数学物理学报（A辑） 2012年第3期32卷 566-575页

作者：代丽美秦国红潍坊学院数学与信息科学学院山东潍坊261061

利用Perron方法证明了R^n中的Hessian商方程在无穷远处具有渐近性质的整体粘性解的存在性.

关键词： Hessian商方程整体解渐近性