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Frontiers of Materials Science 2016年第1期10卷 31-37页

作者： Xing-an JIANG Xiang-ping JIANG chao CHEN NaTU Yun-jing CHEN ban-chao ZHANG Jiangxi Key Laboratory of Advanced Ceramic Materials Department of Materials Science and Engineering Jingdezhen Ceramic Institute Jingdezhen 333001 China

Na0.5Bi4.5-xEuxTi4O15 （NBT-xEu^3＋） ceramics with x= 0, 0.05, 0.10, 0.15, 0.20, 0.25, 0.30 and 0.40 were prepared by conventional ceramics processing. NBT-0.25Eu^3＋ ceramics show the strongest red and orange emissions corresponding to the 5D0 → 7F2 （617 nm） and 5D0→ 7F1 （596 nm） transitions, respectively. The strongest excitation band around 465 nm matches well with the emission wavelength of commercial InGaN-based blue LED chip, indicating that Eu^3＋-doped NBT ceramics may be used as potential environmental friendly red-orange phosphor for W-LEDs application. As an inherent ferroelectric and piezoelectric material, the electrical properties of this potentially multifunctional electro-optical material have been also studied. The introduction of Eu^3＋ distinctly increased the Curie temperature （Tc） of NBT-xEu^3＋ ceramics from 640℃ to 711℃ as x ranges from 0 to 0.40. For higher temperature applications, the electrical conductivity was also investigated. The conduction of charge carriers in hightemperature range originates from the conducting electrons from the ionization of oxygen vacancies. High Tc and low tanδ makes Eu^3＋-doped NBT ceramic also suitable for high temperature piezoelectric sensor applications and electro-optical integration.

关键词： Aurivillius bismuth layered structure photoluminescence electricalproperties multifunctional materials

Comparison of forage yield,silage fermentative quality,anthocyanin stability,antioxidant activity,and in vitro rumen fermentation of anthocyanin-rich purple corn(Zea mays L.) stover and sticky corn stover

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Journal of Integrative Agriculture 2018年第9期17卷 2082-2095页

作者： TIAN Xing-zhou Pramote Paengkoum Siwaporn Paengkoum Sorasak Thongpea ban chao School of Animal Production Technology Institute of Agricultural Technology Suranaree University of Technology Program in Agriculture Faculty of Science and Technology Nakhon Ratchasima Rajabhat University

The objective of this study was to observe the forage yield, silage fermentative quality, anthocyanin stability, and antioxidant activity during the storage period and in vitro rumen fermentation of anthocyanin-rich purple corn （Zea mays L.） stover （PS） and sticky corn stover （SS）. Forage yield of corn stover was weighed and ensiled with two treatments：（1） hybrid sticky waxy corn stover （control）, and （2） hybrid purple waxy corn stover （treatment）. Samples were stored in mini-silos for periods of 0, 7, 14, 21,42, 63, 84, and 105 d. The results showed that PS had significantly higher （P〈0.05） yields of dry matter （DM）, organic matter （OM）, gross energy （GE）, crude protein （CP）, neutral detergent fiber （NDF）, acid detergent fiber （ADF）, and total anthocyanins than that of the SS. Anthocyanin-rich purple corn stover silage （PSS） showed higher （P〈0.05） levels of DM and CP relative to the sticky corn stover silage （SSS）. Although anthocyanin-rich PSS displayed a lower （P〈0.05） level of pelargonidin-3-glucoside （P3G）, it had higher （P〈0.05） levels of peonidin （Peo） and pelargonidin （Pel） compared to the control. Delphinidin （Del） and malvidin （Mal） were not detected in SSS during the ensilage period; in PSS, Del was no longer detected after 7 d of ensilage. Specifically, total anthocyanins in anthocyanin-rich PSS decreased rapidly （P〈0.05） prior to 7 d of ensilage, and then remained at relatively stable （P〉0.05） constants. Compared to the anthocyanin-rich PSS, SSS displayed significantly higher （P〈0.05） pH value and ammonia nitrogen （NH3-N） content. Propionic acid （PA） at 0 d and butyric acid （BA） during the entire study period were not detected, whereas anthocyanin-rich PSS showed a higher （P〈0.05） level of lactic acid （LA） than that of the SSS. Compared with the SSS extract, anthocyanin-rich PSS extract showed a higher （P〈0.05） level of 2,2-diphenyl-1-picryihydrazyl （DPPH） scavenging activity and displayed a lower （P〈0.05） half maximal inhibitory concentration （IC50） v

关键词： anthocyanin-rich purple corn stover silage anthocyanin stability silage fermentative quality antioxidant activity rumen fermentation

Research on the inversion of elemental abundances from Chang'E-2 X-ray spectrometry data

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Chinese Journal Of Geochemistry 2014年第3期33卷 289-299页

作者： ban chao ZHENG Yongchun ZHU Yongchao ZHANG Feng XU Lin ZOU Yongliao National Astronomical Observatories Chinese Academy of Sciences University of Chinese Academy of Sciences Space Science Institute Macao University of Science and Technology

The elemental abundances of lunar surface are the important clues to study the formation and evolution history of the Moon. In 2010, China's Chang'E-2(CE-2) lunar orbiter carried a set of X-ray spectrometer(XRS) to investigate the elemental abundances of the lunar surface. During CE-2's life span around the Moon, the XRS experienced several events of solar flare. The X-ray solar monitor onboard recorded the spectra of solar X-rays at the same time. In this paper, we introduced the XRS instrument and data product. We analyzed the characteristics of the XRS data. Using the data obtained during an M solar flare event which had occurred on Feb. 16, 2011, we derived the elemental abundances of Mg, Al, Si, Ca and Fe of the lunar surface in the Oceanus Procellarum. Finally, we discussed the factors that influence the accuracy of the inversion.

关键词： X射线光谱元素丰度数据反演月球表面太阳耀斑月球探测器演化历史数据产品

Seasonal Variations of Mesospheric Densities Observed by Rayleigh Lidar at Golmud,Qinghai

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空间科学学报 2020年第2期40卷 207-214页

作者： DAI Yaru PAN Weilin QIAO Shuai HU Xiong YAN Zhaoai ban chao Near-space Environment Laboratory National Space Science CenterChinese Academy of SciencesBeijing 100190 Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029 University of Chinese Academy of Sciences Beijing 100049 Zhongneng Power-Tech Development Company of Limited Beijing 100034

From Aug.2013 to Oct.2015,a Rayleigh lidar has been used to study the middle atmosphere at Golmud(36.25°N,94.54°E),Qinghai,located in the northeastern part of the Tibetan *** density profiles from 50 to 90 km were retrieved based on 205 nights of lidar observation,with a total of 1616hours of *** compared our lidar density measurements with SABER observations onboard TIMED satellite and MSIS-00 model *** results showed that the annual mean density measured by lidar agreed well with SABER data,but both were lower than that of *** datasets exhibited dominant annual oscillation in the *** 63 to 85 km,the annual amplitude of lidar density is larger than those of SABER and ***(Percentage of Density Difference)was calculated to investigate the mesospheric density *** largest density variations of lidar,MSIS-00,and SABER occurred at around 72 *** lidar and SABER PDD reached their maximum in May,about one month earlier than the MSIS-00;while the minimum PDD appeared in late December for all datasets.

关键词： Lidar SABER MSIS model Mesospheric density Seasonal variations

Hausdorff Dimension of Multi-Layer Neural Networks

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Advances in Pure Mathematics 2013年第9期3卷 9-14页

作者： Jung-chao ban Chih-Hung Chang Department of Applied Mathematics Feng Chia University Taichung Taiwan Department of Applied Mathematics National Dong Hwa University Hualien Taiwan

This elucidation investigates the Hausdorff dimension of the output space of multi-layer neural networks. When the factor map from the covering space of the output space to the output space has a synchronizing word, the Hausdorff dimension of the output space relates to its topological entropy. This clarifies the geometrical structure of the output space in more details.

关键词： Multi-Layer Neural Networks Hausdorff Dimension Sofic Shift Output Space

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高压电子铝箔阳极电解扩孔行为

中国有色金属学报 2008年第12期18卷 2190-2195页

作者：班朝磊何业东北京科技大学北京市腐蚀、磨蚀与表面技术重点实验室北京100083

研究发孔铝箔在盐酸和硝酸溶液中的阳极极化行为与扩孔特性的关系。阳极扩孔的基本条件是将发孔箔的内、外表面都控制在钝化状态下。在盐酸溶液中,阳极极化时存在点蚀电位和一个较小的钝化电位区,当扩孔施加的电流密度大于临界点蚀电流... 详细信息

研究发孔铝箔在盐酸和硝酸溶液中的阳极极化行为与扩孔特性的关系。阳极扩孔的基本条件是将发孔箔的内、外表面都控制在钝化状态下。在盐酸溶液中,阳极极化时存在点蚀电位和一个较小的钝化电位区,当扩孔施加的电流密度大于临界点蚀电流密度时,铝箔表面发生二次发孔,导致形成孔蚀族与并孔,腐蚀箔厚度减薄,比电容显著降低。在硝酸溶液中,阳极极化时存在一个宽阔的钝化电位区,因此硝酸扩孔比盐酸扩孔容易控制,不会发生二次发孔。提高盐酸或硝酸浓度与温度均可以增大最大维钝电流密度,即增大扩孔的最大电流密度,提高扩孔的生产效率。

关键词：铝箔电解电容器电蚀极化曲线孔蚀

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基于方差分析的铝箔电解扩面腐蚀

材料热处理学报 2015年第2期36卷 219-223页

作者：朱淑芹班朝磊聊城大学计算机学院山东聊城252059 聊城大学材料科学与工程学院山东聊城252059

应用正交实验方差分析研究了高压铝电解电容器用铝箔电解扩面腐蚀时,发孔腐蚀液中H2SO4浓度、HCl浓度、温度、电解电流密度和电解腐蚀时间对铝箔腐蚀扩面效果的影响;采用扫描电镜观测和极化曲线测试研究了发孔腐蚀液中H2SO4浓度变化对... 详细信息

应用正交实验方差分析研究了高压铝电解电容器用铝箔电解扩面腐蚀时,发孔腐蚀液中H2SO4浓度、HCl浓度、温度、电解电流密度和电解腐蚀时间对铝箔腐蚀扩面效果的影响;采用扫描电镜观测和极化曲线测试研究了发孔腐蚀液中H2SO4浓度变化对腐蚀铝箔表面形貌、横截面形貌以及电蚀发孔点蚀能力的影响。结果表明:腐蚀液中H2SO4浓度是最重要的影响因素,随着H2SO4浓度的增加,极化曲线上点蚀电流密度减小、发孔密度降低、隧道孔长度减小、并孔程度减轻,在本研究范围内,较佳的腐蚀工艺条件为:盐酸浓度1.4 mol·L-1、硫酸浓度3.2 mol·L-1、温度73℃、电流密度0.30 A·cm-2、时间50 s。

关键词：正交实验方差分析铝电解电容器电解腐蚀

Effect of citric acid on microstructure and electrochemical characteristics of high voltage anodized alumina film formed on etched Al Foils

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Transactions of Nonferrous Metals Society of China 2011年第1期21卷 133-138页

作者：班朝磊何业东邵鑫聊城大学材料科学与工程学院聊城252059 北京科技大学北京市腐蚀磨蚀与表面技术重点实验室北京100083

Aluminum capacitor foils with a tunnel etch structure were reacted with boiling water and then anodized at 530 V in boric acid solution or boric acid＋citric acid mixed *** microstructure and crystallinity of the resulting anodized film were examined by TEM and *** special capacitance,resistance and withstanding voltage of the film were explored with electrochemical impedance spectroscopy（EIS）,LCR meter and small-current *** results show that the high voltage anodized oxide film consists of an inner layer with high crystallinity and an outer layer with low ***,the crystallinity of the film formed in boric acid＋citric acid mixed solution is higher than that of the film formed in only boric acid solution,leading to an increase in film＇s field strength and special ***,there are more defects from phase transformation in the out layer of the film formed in boric acid＋citric acid mixed solution than in that of film formed in only boric acid solution,leading to a decrease in film＇s resistance and withstanding voltage.

关键词： citric acid anodized oxide film Al foil Al electrolytic capacitor electrochemical performance

腐蚀铝箔高压阳极氧化膜微观结构与电化学特征

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材料热处理学报 2010年第6期31卷 112-115页

作者：班朝磊何业东邵鑫聊城大学材料科学与工程学院山东聊城252059 北京科技大学北京市腐蚀磨蚀与表面技术重点实验室北京100083

将高压铝电解电容器用腐蚀铝箔在硼酸电解质溶液中进行530 V阳极氧化,应用透射电镜与交流阻抗研究了所形成的高压阳极氧化膜的微观结构与电化学特征。结果表明:高压阳极氧化膜具有明显的层状结构特征,各层的结晶程度与缺陷特征不同,外... 详细信息

将高压铝电解电容器用腐蚀铝箔在硼酸电解质溶液中进行530 V阳极氧化,应用透射电镜与交流阻抗研究了所形成的高压阳极氧化膜的微观结构与电化学特征。结果表明:高压阳极氧化膜具有明显的层状结构特征,各层的结晶程度与缺陷特征不同,外层晶化程度较低、缺陷较少;中层与内层晶化程度较高、缺陷较多;铝箔表面微孔诱发弥散效应,交流阻抗频谱的等效电路可用膜QOX与膜电阻ROX并联,再与电解液电阻RS串联来表征,容抗行为显著接近界面电容元件特性,膜电阻处于氧化膜非晶质层电阻与结晶质层电阻之间而偏向结晶质层电阻。

关键词：阳极氧化膜铝箔电解电容器交流阻抗

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酸碱预处理对阳极铝箔电蚀特征的影响

轻合金加工技术 2010年第5期38卷 39-41页

作者：班朝磊聊城大学材料科学与工程学院山东聊城252059

利用扫描电镜研究了高压铝箔在75℃、6%HCl溶液、40℃、0.5%NaOH溶液和40℃、10%NaCl溶液中分别进行1min预处理后对其电蚀特征与化成箔比电容的影响。结果表明,酸洗、碱洗可以提高电蚀时蚀孔萌生密度,改善蚀孔分布均匀性,提高电蚀后铝... 详细信息

利用扫描电镜研究了高压铝箔在75℃、6%HCl溶液、40℃、0.5%NaOH溶液和40℃、10%NaCl溶液中分别进行1min预处理后对其电蚀特征与化成箔比电容的影响。结果表明,酸洗、碱洗可以提高电蚀时蚀孔萌生密度,改善蚀孔分布均匀性,提高电蚀后铝箔表面积与比电容。

关键词：铝电解电容器铝箔预处理电蚀