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Grain Size and Photocatalytic Activity of Nanometer TiO_2 Thin Films Prepared by the Sol-gel Method

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Journal of Wuhan University of Technology(Materials Science) 2001年第2期16卷 1-5页

作者：余家国 SKLATMSP Wuhan University of Technololgy Wuhan 430070 China

Transparent anatase TiO2 nanometer thin films with photocatalytic activity were prepared via the sol-gel method on soda-lime glass. The thickness , crystalline phase, grain size, surface hydroxyl amount and so on were characterized by scanning electron microscopy (SEM) , X-ray diffraction (XRD), transmission electron microscopy ( TEM), X-ray photoelectron spectroscopy (XPS) and UV-visible spectrophotometer ( UV-VIS). The photocatalytic activity of TiO2 thin films was evaluated for the photocatalytic decolorization of aqueous methyl orange . The effects of film thickness on the crystalline phase, grain size, transmittance and photocatalytic activity of nanometer Ti02 thin films were discussed.

关键词： sol-gel method titania thin films grain size photocatalytic activity

IR Spectra Analysis of SiO_2-TiO_2-GeO_2 Gel Glass of CO_2 Laser Transmitting Hollow Waveguide

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Journal of Wuhan University of Technology(Materials Science) 2002年第4期17卷 54-57页

作者：敬承斌 The State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

Both titanium and germanium were introduced into silicon dioxide system by sol-gel method to move its region of anomalous dispersion caused by IR resonance absorption towards the wavelength of CO 2 *** is indicated by IR absorption spectra that as the content of SiO 2 decreases in this glass system TiO 2 and GeO 2 tends to exist in their own *** for the gel glass with a composition of 40SiO 2·30TiO 2·30GeO 2,when the temperature is below 600℃,germanium atoms exist mainly in Ge-O-Ge *** the temperature increasing from 800℃ to 1000℃, titanium atoms in Si-O-Ti bonds almost transform into Ti-O-Ti ***,a large number of Si-O-Ti and Si-O-Ge bonds formed when the temperature approaches 800℃,which makes a notable IR absorption band round the wavelength of CO 2 ***, sol-gel based SiO 2-TiO 2-GeO 2 gel glass is a candidate material for CO 2 laser hollow waveguide.

关键词： hollow waveguide SiO 2-TiO 2-GeO 2 gel glass IR spectra CO 2 laser

Fabrication and property analysis of AlGaInP red light LED with high bright

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Optoelectronics Letters 2007年第6期3卷 417-419页

作者： han jun LI jian-jun DENG jun XING Yan-hui YU Xiao-dong LIN Wei-zhi LIU Ying SHEN Guang-di Beijing Optoelectronic Technology Lab Beijing University of Technology Beijing 100022 China

The LED with DBR and enhancing transmission film was grown by MOCVD. At 20 mA DC injection current, the LED peak wavelength was 623 nm, the light intensity was 200 mcd, and the output light power was 2.14 mW. The ligh... 详细信息

关键词：高亮度灯发光二极管技术性能产品制造

Microwave ablation： results in ex vivo and in vivo porcine livers with 2450-MHz cooled-shaft antenna

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Chinese Medical Journal 2011年第20期124卷 3386-3393页

作者： ZHOU Qi JINXing JIAO De-chao ZhanG Fu-jun ZhanG Liang han Xin-wei DUAN Guang-feng han jian-jun LI Chuan-xing Department of Hepatobiliary Surgery First Affiliated Hospital Sun Yat-sen University Guangzhou Guangdong 510080 China Department of Interventional Radiology Fourth Hospital of Jilin University Changchun Jilin 130021 China Department of Interventional Radiology First Affiliated Hospital of Zhengzhou University Zhengzhou Henan 450052 China Department of Imaging and Interventional Radiology Cancer Center and State Key Laboratory of Oncology in South China Sun Yat-sen University Guangzhou Guangdong 510060 China

Background Imaging-guided thermal ablation using different energy sources continues to gain favor as a minimally invasive technique for the treatment of primary and metastatic hepatic malignant tumors. This study aimed to evaluate the performance of microwave ablation with 2450-MHz internally cooled-shaft antenna in ex vivo and in vivo porcine livers. Methods All studies were animal care and ethics committee approved. Microwave ablation was performed using a noncooled or cooled-shaft antenna in 23 ex vivo （92 ablations） and eight in vivo （36 ablations） porcine livers. Diameters of the coagulation zone were observed on gross specimens. The coagulation diameters achieved in different microwave ablation parameter groups were compared. Curve estimation analysis was performed to characterize the relationship between applied power and treatment duration and coagulation diameter （including short-axis and long-axis diameter）. Results Coagulation zones were elliptical and an arrowed-shaped carbonization zone around the shaft was observed in all groups. But the antenna track was also coagulated in the noncooled-shaft antenna groups. In ex vivo livers, the short-axis diameter correlated with the power output in a quadratic curve fashion （R2=0.95） by fixing ablation duration to 10 minutes, and correlated with the ablation duration in a logarithmic curve fashion （R2=0.98） by fixing power output to 80 W. The short-axis reached a relative plateau within 25 minutes. In in vivo livers, short-axis diameter correlated with the coagulation duration in a sigmoidal curve fashion （60 W group R2=0.76, 80 W group R2=0.87）, with a relative plateau achieved within 10 minutes for power settings of 60 W and 80 W. Conclusions The internally cooled microwave antenna may be advantageous to minimize collateral damage. The short-axis diameter enlargement has a plateau by fixing power output.

关键词： animals experimental study liver microwave ablation

TWO NEW SESQUITERPENOIDS FROM TUSSILAGO FARFAR L 　

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Chinese Chemical Letters 1995年第7期6卷 585-586页

作者： Wei SHI, Gui Qiu han and jian jun GAO(National Laboratory of Natural and Biomimetic Drugs. Beijing Medical University. Beijing 100083)

Two new sesquitrpenoids. named as tussilagonone I (1) and neotussilagolactone I (2). were isolated from the dry flower bud of Tussilago farfara L. Their Structures were elucidated by the spectroseopic methods . In the test of platelet aggregation caused by platelet activating factor (PAF).compounds 1 and 2 tvers active.

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一种基于模特征的增量式张量Tucker分解方法

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控制与决策 2024年第7期39卷 2431-2437页

作者：渠超洋韩建军华中科技大学计算机科学与技术学院武汉430000

随着数据量的爆炸式增长,边缘计算在大数据处理中的作用愈加重要.现实应用中产生的数据通常建模表示成高阶增量式张量的形式,增量式张量Tucker分解是一种高效挖掘高阶海量数据中隐藏信息的方法.针对传统增量式张量分解忽视张量模特征对... 详细信息

随着数据量的爆炸式增长,边缘计算在大数据处理中的作用愈加重要.现实应用中产生的数据通常建模表示成高阶增量式张量的形式,增量式张量Tucker分解是一种高效挖掘高阶海量数据中隐藏信息的方法.针对传统增量式张量分解忽视张量模特征对分解过程的影响、分解结果不能较好保留原始数据特征的问题,提出一种基于模特征的增量式张量Tucker分解方法 ITTDMC (incremental tensor tucker decomposition based on mode characteristics).首先,用模长增量决定增量因子矩阵更新顺序,以此降低更新顺序带来的重构误差;其次,根据模熵变化比决定增量因子矩阵更新权重,使分解结果更准确保留各模特征;然后,将过往时刻的模特征和更新参数记录在指导张量中,遇到模特征相似的增量数据时直接使用来指导张量中参数的更新,避免重复计算,降低时间开销;最后,在合成和真实数据集上进行大量的实验,实验结果表明ITTDMC在模特征明显的数据集上能显著降低(最高可达29%)增量式张量的重构误差.

关键词：大数据增量式张量 Tucker分解模特征模长增量模熵

Anomalous quality factor evolution of induced transparency in a virtualized coupled-oscillator system

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 148-155页

作者： Yunhan Yang han Jia Tuo Liu Yuzhen Yang jun Yang Key Laboratory of Noise and Vibration Research Institute of Acoustics Chinese Academy of Sciences University of Chinese Academy of Sciences State Key Laboratory of Acoustics Institute of Acoustics Chinese Academy of Sciences

The phenomenon of induced transparency, characterized by a high quality(Q) factor, holds significant importance in the fields of high-precision sensing, energy storage and wave manipulation. Conventional transparency systems are often constrained by the limited experimentally accessible parameter space and the lack of independent control over intrinsic parameters, thereby hindering advanced research on high-Q effects. Here we propose a virtualized coupled-oscillator system that enables reconfigurable induced transparency in the reflection spectrum. By virtually incorporating a pair of coupled oscillators into an individual acoustic meta-atom, we achieve the manipulation of induced transparency in a decoupled, wide-ranging, and elaborate manner. Exploiting the diverse evolutions across the intrinsic parameter space, we show experimentally a counter-intuitive increase in the Q-factor of the transparency window, which is attributed to the enhanced dissipation of the bright ***, a constant group delay at the center frequency is observed accompanying this evolution. Our work demonstrates an intriguing platform as well as a novel strategy to engineer high-Q induced transparency phenomenon, and paves the way towards applications in programmable acoustic sensors, filters and slow-wave devices.

关键词： induced transparency acoustic meta-atom high quality-factor scattering programmable intrinsic parameter

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胡萝卜甜橙复合饮料的研制

安徽农业科学 2009年第10期37卷 4639-4639,4663页

作者：韩建军武警工程学院军事经济系陕西西安710086

以甜橙、胡萝卜为原料,对保健型胡萝卜甜橙复合饮料的配方及稳定性进行了研究,结果表明,其最佳配方为胡萝卜汁25%、鲜橙汁15%、白砂糖8%、柠檬酸0.20%。

关键词：胡萝卜甜橙复合饮料

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电子商务下的信任网络构造与优化

计算机学报 2012年第1期35卷 27-37页

作者：甘早斌曾灿李开韩建军华中科技大学计算机科学与技术学院武汉430074

电子商务环境中交易实体间的信任关系类似于传统商务环境中复杂的社会关系.实体间的信任度量涉及到交易额、交易发生时间、消费实体个人收入及其对信任的风险态度等因素,难以准确地给出量化计算.为探明这种信任关系的本质特点,结合现实... 详细信息

电子商务环境中交易实体间的信任关系类似于传统商务环境中复杂的社会关系.实体间的信任度量涉及到交易额、交易发生时间、消费实体个人收入及其对信任的风险态度等因素,难以准确地给出量化计算.为探明这种信任关系的本质特点,结合现实生活中社会关系网络的一些认知理论和方法,详细分析和定义了实体及实体关系的相关属性,提出了一种信任网络描述的形式化模型.研究了信任网络的构造方法,建立了一套信任网络优化算法,有效地降低了信任网络的复杂性.最后,给出了一套信任网络可视化自动生成工具,通过实例应用分析表明,信任网络形式化描述模型和优化算法可以很好地揭示电子商务环境中复杂的信任关系,降低了信任度量算法的复杂度,可为信任的传播机制和信任计算模型的研究提供理论基础.

关键词：电子商务信任网络网络优化信任计算