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METHANE DIRECT CONVERSION TO ETHENE OVER Mo/SAPO-34 CATALYSTS

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Chinese Journal of Catalysis 1995年第1期 3-4页

作者： Wong, she-Tin Xu, Yi-de and Guo, Xie-xian(State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023)

We have studied the methane activation in non-oxidative condition[1,2],and have shown the possibility of direct methane conversion to aromaticsover Mo/*** is regarded as the initial product of the *** thus pay attention to the selective production of ethene and low hydro-carbons from methane *** molecular sieve HSAPO-34（SP） waschosen as catalyst support,which has the framework topology of naturalchabazite,and has been shown to convert methanol selectively to Cl~ C3 hy-drocarbons[3].The framework Of SP contains a three-dimensional channel

关键词： methane direct conversion ethene Mo/SAPO-34

蓝宝石邻晶面衬底MBE生长GaN薄膜的瞬态光电导弛豫特性研究

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物理学报 2007年第7期56卷 4218-4223页

作者：苑进社陈光德重庆师范大学物理学与信息技术学院重庆400047 西安交通大学理学院西安710048

在实验优化MBE工艺条件的基础上,采用蓝宝石(0001)邻晶面衬底制备出了具有较高质量的GaN薄膜.XRD分析表明邻晶面衬底生长的GaN薄膜晶体结构质量明显提高,AFM表征结果显示邻晶面生长的样品表面形貌显著改善.蓝宝石衬底GaN薄膜的瞬态光电... 详细信息

在实验优化MBE工艺条件的基础上,采用蓝宝石(0001)邻晶面衬底制备出了具有较高质量的GaN薄膜.XRD分析表明邻晶面衬底生长的GaN薄膜晶体结构质量明显提高,AFM表征结果显示邻晶面生长的样品表面形貌显著改善.蓝宝石衬底GaN薄膜的瞬态光电导弛豫特性对比实验研究发现,常规衬底生长的GaN薄膜光电导弛豫特性出现双分子复合、单分子复合和弛豫振荡三个过程,持续时间分别为0.91,7.7和35.5ms;蓝宝石邻晶面衬底生长的GaN薄膜光电导弛豫过程主要是双分子复合和单分子复合过程,持续时间分别为0.78和14ms.理论分析表明MBE生长GaN薄膜的持续光电导效应主要起源于本生位错缺陷引发的深能级.

关键词：邻晶面蓝宝石衬底 GaN薄膜瞬态光电导弛豫特性

Towards Better Understanding of App Functions

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Journal of Computer Science & Technology 2015年第5期30卷 1130-1140页

作者：童咏昕余洁莹陈雷 State Key Laboratory of Software development Environment School of Computer Science and Engineering Beihang University Beijing 100191 China International Research Institute for Multidisciplinary Science Beihang University Beijing 100191 China department of Computer Science and Engineering The Hong Kong University of Science and Technology Hong I(ong China

Apps are attracting more and more attention from both mobile and web platforms. Due to the self-organized nature of the current app marketplaces, the descriptions of apps are not formally written and contain a lot of noisy words and sentences. Thus, for most of the apps, the functions of them are not well documented and thus cannot be captured by app search engines easily. In this paper, we study the problem of inferring the real functions of an app by identifying the most informative words in its description. In order to utilize and integrate the diverse information of the app corpus in a proper way, we propose a probabilistic topic model to discover the latent data structure of the app corpus. The outputs of the topic model are further used to identify the function of an app and its most informative words. We verify the effectiveness of the proposed methods through extensive experiments on two real app datasets crawled from Google Play and Windows Phone Store, respectively.

关键词： app function docmnent topic model

不同泌乳阶段和胎次对广东地区奶牛泌乳性能的影响及变化规律研究

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中国奶牛 2024年第4期 10-16页

作者：雷芷琳佘远航郭建超刘建营邓铭刘德武郭勇庆华南农业大学动物科学学院广州510642 广东省种畜禽质量检测中心广州510665 广东省畜牧技术推广总站广州510030

本文通过分析广东省某规模化奶牛场2022年生产性能测定(DHI)数据,研究不同泌乳阶段、胎次对奶牛泌乳性能的影响及其变化规律。结果显示,随着泌乳天数的增长,奶牛产奶量、乳中尿素氮和脂蛋比呈现先上升后下降的变化规律,乳蛋白率和乳脂... 详细信息

本文通过分析广东省某规模化奶牛场2022年生产性能测定(DHI)数据,研究不同泌乳阶段、胎次对奶牛泌乳性能的影响及其变化规律。结果显示,随着泌乳天数的增长,奶牛产奶量、乳中尿素氮和脂蛋比呈现先上升后下降的变化规律,乳蛋白率和乳脂率为先下降后上升,而体细胞数为逐步升高;随着胎次的增加,奶牛产奶量、乳脂率和脂蛋比表现出先上升后下降的趋势,而体细胞数逐步升高;奶牛产奶量与乳品质各指标之间存在一定相关关系。因此,生产中应以奶牛的泌乳阶段和胎次为依据,对奶牛进行合理分群和饲料配制,进而提高奶产量、乳品质和奶牛场经济效益。

关键词：奶牛泌乳阶段胎次产奶量乳品质

Optical resonance of metal-coated nanoshell

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Chinese Physics B 2003年第1期12卷 100-106页

作者： Diao Jia-Jie(刁佳杰) Chen Guang-de(陈光德) Xi Cong(席聪) Z Y Fan Yuan Jin-she(苑进社) department of Applied Physics Xi'an Jiaotong University Xi'an 710049 China School of Electronic and Information Engineering Xi'an Jiaotong University Xi'an 710049 China department of Physics Kansas State University Manhattan Kansas 66506-2601 USA

Metal-coated nanoshell, the nanoparticle consisting of a nanometre-scale dielectric core coated with a thin metallic shell, exhibits three distinct optical resonant forms, the sphere cavity resonance (SCR), plasmon resonance (PR), and concentric dielectric sphere resonance (CDSR). The SCR, PR and CDSR of the metal-coated nanoshell reveal a geometric tunability controlled by the core radius and by the ratio of the core radius to the total radius. Classical electrodynamics and Mie scattering theory are used to treat the resonant forms and the transition state between the resonant forms. Based on previous experimental research, we present a group of resonant equations for all the resonant forms, which depend on the geometric structure of the metal-coated nanoshell.

关键词： metal-coated nanoshell optical resonance resonant wavelength skin effect

浙江省弄蝶科新记录——危害加拿利海枣的黑星弄蝶

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浙江林业科技 2011年第6期31卷 74-75页

作者：佘德松丽水职业技术学院浙江丽水323000

在浙江苍南县发现一种危害加拿利海枣(Phoenix canariensis)的弄蝶,经鉴定为黑星弄蝶[Suastus gremius(Fabricius)],为浙江省弄蝶科新记录种。

关键词：弄蝶新记录浙江

Fabrication of Ce-ReS_(2)by Molten Salt for Electrochemical Hydrogen Evolution

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Transactions of Tianjin University 2022年第6期28卷 440-445页

作者： Ran Chen Minghai Ma Yi Luo Liping Qian Shunli Wan shengyou Xu Xinsong she College of Life&Environmental Sciences Huangshan UniversityHuangshan 245041China

Renewable and economical generation of hydrogen via electrochemical methods shows great potential in addressing the energy *** this study,an emerging molten salt method was adopted for the synthesis of a cerium-modifi ed rhenium disulfi de nanosheet for electrical hydrogen evolution *** prepared 1%Ce-doped rhenium disulfi de(ReS_(2))sample showed promoted hydrogen evolution performance in both acid and alkaline electrolytes compared to bare ReS_(2).Generating of abundant defects in ReS_(2)exposed more reaction active ***,adding cerium accelerated the hydrogen evolution ***,this work will off er new insight into developing ReS_(2)-based electrocatalysts for hydrogen evolution reactions.

关键词： Hydrogen Molten salt Ce-doped rhenium disulfi de defects

发达省份偏远地区高职院校专业建设策略——以丽水职业技术学院为例

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职业技术教育 2012年第26期33卷 38-40页

作者：佘德松丽水职业技术学院浙江丽水323000

针对丽水区域经济发展任务重、速度快、人才引进困难以及高职院校师资薄弱、财政投入不足的现状,高职院校应创新专业建设策略:组建产业学院,以优势专业带动相关专业;校企合作建专业,提升专业实力;实施适应产业特点的培养模式和教学方式... 详细信息

针对丽水区域经济发展任务重、速度快、人才引进困难以及高职院校师资薄弱、财政投入不足的现状,高职院校应创新专业建设策略:组建产业学院,以优势专业带动相关专业;校企合作建专业,提升专业实力;实施适应产业特点的培养模式和教学方式;构建适应中小企业要求的区域特色课程体系;盘活校内资源,增强专业对产业的支撑力。

关键词：高职院校专业建设偏远地区策略发达省份

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不同配比玉米秆复合基质对番茄生长的影响

北方园艺 2014年第2期 169-171页

作者：佘德琴南通农业职业技术学院江苏南通226007

以"奥运08"番茄为研究对象,以玉米秆、珍珠岩、蛭石为试材,研究了100%玉米秆、75%玉米秆+15%珍珠岩+10%蛭石、50%玉米秆+30%珍珠岩+20%蛭石、25%玉米秆+45%珍珠岩+30%蛭石4种复合基质处理对番茄生长的影响。结果表明:75%玉米秆+15%珍珠... 详细信息

以"奥运08"番茄为研究对象,以玉米秆、珍珠岩、蛭石为试材,研究了100%玉米秆、75%玉米秆+15%珍珠岩+10%蛭石、50%玉米秆+30%珍珠岩+20%蛭石、25%玉米秆+45%珍珠岩+30%蛭石4种复合基质处理对番茄生长的影响。结果表明:75%玉米秆+15%珍珠岩+10%蛭石的基质番茄植株各项生长指标均高于其它处理,产量也明显高于其它处理,因此该处理为玉米秆复合基质番茄的最佳基质配方。

关键词：玉米秆复合基质番茄