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Synthesis and luminescence of single crystalline Bi_2O_3 nanosheets

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Science China(Technological Sciences) 2011年第1期54卷 19-22页

作者： FANG GuoLi CHEN Guang WANG Xiong liu jinqiang Engineering Research Center of Materials Behavior and Design Ministry of Education Joint Laboratory ofNanostructured Materials and Technology Nanjing University of Science and Technology Nanjing 210094 China

Single crystalline Bi2O3 nanosheets have been synthesized by the surfactant assisted solvothermal method, using oleic acid and sodium dodecyl benzene sulfonate （SDBS） as compound surfactants. The thickness of Bi2O3 nanosheets is 40--70 nm with a monoclinic crystal structure. High-resolution transmission electron microscopy observation reveals that （ 345 ） lattice plane of the single crystal is parallel to the surface of the nanosheets. The cooperative effect of oleic acid encapsulated SDBS is the key to form single crystalline a-Bi2O3 nanosheets with a preferred growth orientation. An obvious blue shift of the single crystalline Bi2O3 nanosheets with a preferred surface （ 34-5 ） is observed due to quantum confinement effects in thickness and optical anisotropy.

关键词： α-Bi2O3 nanosheets surfactant assisted solvothermal luminescence property

Very short-term wind speed prediction-based inertial control of a DFIG wind farm 36

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Very short-term wind speed prediction-based inertial control...

Hydrothermal Synthesis of Xonotlite-type Calcium Silicate Insulation Material Using Industrial Zirconium Waste Residue

第36届中国控制会议

作者： Yun Lu jinqiang liu Xiaoru Wang Southwest Jiaotong University

ISBN: (纸本)9781538629185

Rapid growth of wind power penetration brings difficulties in maintaining the power system frequency stability after a large active power *** is specified in some countries that wind farms must provide frequency support *** properly exploit the kinetic energy stored in the doubly fed induction generator（DFIG） to support the frequency regulation,especially considering the realistic wind speed variation during the transient process,a very short-term wind speed prediction（VSWSP）-based inertial control scheme is proposed in this paper,including the rate of change of frequency（ROCOF） and droop *** loop gains are adjusted based on the predicted average wind speed in the future 10 seconds,which enables the inertial control adaptive to the wind speed variation during the transient *** results indicate that the proposed scheme shows better performance than conventional fixed gain scheme in terms of improving the frequency nadir and preventing the DFIG from over-deceleration during the inertial control.

关键词： Inertial control scheme doubly fed induction generator(DFIG) very short-term wind speed prediction adaptive loop gains wind speed variation

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Journal of Wuhan University of Technology(Materials Science) 2011年第3期26卷 519-522页

作者：江金国崔崇 Department of Materials Science and Engineering Nanjing University of Science & Technology

Xonotlite-type insulation material was prepared by hydrothermal synthesis technology using industrial zirconium waste residue in this paper,and the phase analysis together with the observation of micro–morphology were also carried out by XRD,SEM and *** density and thermal conductivity were measured *** results indicate,chlorine ion impurity contained in zirconium waste residue can be removed effectively via water washed process,and the reactive activity of silicon dioxide is almost not affected,which make it be a good substitution of silicon material for the preparation of calcium silicate insulation material by hydrothermal synthesis *** density and thermal conductivity of xonotlite-type calcium silicate insulation material obtained by hydrothermal synthesis technique can reach 159 kg/m3,0.049 W/（m·° C）,respectively,meeting with National Standard well,when synthesis conditions are selected as follows：Ca/Si molar ratio equal to 1,synthesis temperature at 210°C and kept for 8 *** provides a new approach to realize lightweight and low thermal conductivity of calcium silicate insulation material.

关键词： zirconium waste residue calcium silicate xonotlite hydrothermal synthesis

吲哚-2-甲酸和(S)-吲哚啉-2-甲酸的合成和相互转化研究进展

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有机化学 2011年第5期31卷 634-645页

作者：刘金强钱超陈新志浙江大学化学工程与生物工程学系杭州310027 洛阳师范学院化学化工学院洛阳471022

吲哚-2-甲酸和(S)-吲哚啉-2-甲酸均是具有生物活性的天然产物和众多降压药的特征结构片段,报道了它们的合成及其相互转化研究进展.吲哚啉-2-甲酸可由吲哚-2-甲酸还原制得,其中(S)-吲哚啉-2-甲酸可由外消旋体拆分或通过不对称合成法制备... 详细信息

吲哚-2-甲酸和(S)-吲哚啉-2-甲酸均是具有生物活性的天然产物和众多降压药的特征结构片段,报道了它们的合成及其相互转化研究进展.吲哚啉-2-甲酸可由吲哚-2-甲酸还原制得,其中(S)-吲哚啉-2-甲酸可由外消旋体拆分或通过不对称合成法制备,其中"手性源法"作为一种新出现的方法具有较好的前景.吲哚-2-甲酸可由Fischer吲哚合成法制备,或通过取代苯胺或苯甲醛制备,也可通过吲哚啉衍生物氧化脱氢制备,其中Fischer合成法仍具有较强的竞争力.

关键词：吲哚-2-甲酸吲哚啉-2-甲酸相互转化研究进展

基于PhabrOmeter的毛巾织物手感风格评价

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纺织学报 2013年第8期34卷 48-51页

作者：屠吉利刘今强浙江理工大学先进纺织材料与制备技术教育部重点实验室浙江杭州310018 浙江理工大学生态染整技术教育部工程研究中心浙江杭州310018

为探求织物手感性能测量仪器PhabrOmeter3在毛巾类织物柔软整理效果评价中的应用价值,客观测试了毛巾类织物的手感风格值,并与主观手感评价结果进行对比。实验选取3种不同的柔软剂以2种浓度浸渍处理毛巾织物,调湿后用于主客观风格测试... 详细信息

为探求织物手感性能测量仪器PhabrOmeter3在毛巾类织物柔软整理效果评价中的应用价值,客观测试了毛巾类织物的手感风格值,并与主观手感评价结果进行对比。实验选取3种不同的柔软剂以2种浓度浸渍处理毛巾织物,调湿后用于主客观风格测试。结果表明,PhabrOmeter评价系统不仅可以方便快捷地测试织物的手感风格特征,包括硬挺度、光滑度、柔软度、悬垂系数及相对手感值,而且可清楚地揭示不同柔软剂对织物手感的影响程度以及不同浓度整理效果间的区别,其中,若将试样以柔软程度进行排序,其结果与主观柔软评价的顺序一致。

关键词： PhabrOmeter手感评价体系主观评价手感柔软剂毛巾

Noncontrast-enhanced MRI-based Noninvasive Score for Portal Hypertension(CHESS1802):An International Multicenter Study

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Journal of Clinical and Translational Hepatology 2021年第6期9卷 818-827页

作者： Yanna liu Tianyu Tang NecatiÖrmeci Yifei Huang Jitao Wang Xiaoguo Li Zhiwei Li Weimin An Dengxiang liu Chunqing Zhang Changchun liu jinqiang liu Chuan liu Guangchuan Wang Cristina Mosconi Alberta Cappelli Antonio Bruno Seray Akçalar EmrecanÇelebioğlu EvrenÜstüner Sadık Bilgiç Zeynep Ellik ÖzgünÖmer Asiller Lei Li Haijun Zhang Ning Kang Dan Xu Ruiling He Yan Wang Yang Bu Ye Gu Shenghong Ju Rita Golfieri Xiaolong Qi CHESS Center Institute of Portal HypertensionThe First Hospital of Lanzhou UniversityLanzhouGansuChina CHESS Center The Sixth People’s Hospital of ShenyangShenyangLiaoningChina Department of Infectious Disease Nanfang HospitalSouthern Medical UniversityGuangzhouGuangdongChina Department of Microbiology and Infec-tious Disease Center School of Basic Medical SciencesPeking University Health Science CenterBeijingChina Depart-ment of Radiology Zhongda HospitalMedical School of Southeast UniversityNanjingJiangsuChina Istanbul Health and Technology University Zytinburnu/İstanbulTurkey CHESS Working Party Xingtai People’s HospitalXingtaiHebeiChina Department of Hepatobiliary Surgery The Third People’s Hospital of ShenzhenShenzhenGuangdongChina Department of Radiology Fifth Medical Center of PLA General HospitalBeijingChina Department of Gastroenterol-ogy Shandong Provincial Hospital Affiliated to Shandong UniversityJinanShandongChina Department of Radiology IRCCS Azienda Ospedaliero-Universitaria di BolognaUniversity of BolognaItaly Department of Radiology Ankara University School of MedicineAnkaraTurkey Department of Gastroenterology Ankara University School of MedicineAnkaraTurkey Department of Hepatobiliary Surgery People’s Hospital of Ningxia Hui Autonomous RegionYinchuanNingxiaChina

Background and Aims:This study aimed to determine the performance of the non-invasive score using noncontrastenhanced MRI(CHESS-DIS score)for detecting portal hy-pertension in ***:In this international multicenter,diagnostic study(***,NCT03766880),patients with cirrhosis who had hepatic venous pressure gradient(HVPG)measurement and noncontrast-enhanced MRI were prospectively recruited from four university hospitals in China(n=4)and Turkey(n=1)between December 2018 and April 2019.A cohort of patients was retrospectively recruited from a university hospital in Italy between March 2015 and November *** segmentation of the liver on fat-suppressed T1-weighted MRI maps,CHESS-DIS score was calculated automatically by an in-house developed code based on the quantification of liver surface ***:A total of 149 patients were included,of which 124 were from four Chinese hospitals(training cohort)and 25 were from two international hospitals(validation cohort).A positive correlation between CHESS-DIS score and HVPG was found with the correlation coefficients of 0.36(p<0.0001)and 0.55(p<0.01)for the training and validation cohorts,*** area under the receiver operating characteristic curve of CHESS-DIS score in detection of clinically significant portal hypertension(CSPH)was 0.81 and 0.9 in the training and validation cohorts,*** intra-class correlation coefficients for assessing the inter-and intra-observer agreement were 0.846 and 0.841,***:A non-invasive score using noncontrast-enhanced MRI was developed and proved to be significantly correlated with invasive ***,this score could be used to detect CSPH in patients with cirrhosis.

关键词： Liver cirrhosis Advanced chronic liver disease Hepatic venous pressure gradient Liver surface nodularity Imaging

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过氧化脲在氧化反应中的应用研究进展

有机化学 2012年第2期32卷 254-265页

作者：计立刘金强钱超陈新志浙江大学化学工程与生物工程学系杭州310027 洛阳师范学院化学化工学院洛阳471022

氧化反应是重要的有机合成单元反应,常采用H2O2或过氧酸等为氧化剂.近年来,过氧化脲作为一种清洁环保的固态H2O2,以其性质稳定、H2O2含量高(36.2%)且释放可控等优点,在众多氧化反应中得到了广泛应用.对过氧化脲在氧化反应中的应用进行... 详细信息

氧化反应是重要的有机合成单元反应,常采用H2O2或过氧酸等为氧化剂.近年来,过氧化脲作为一种清洁环保的固态H2O2,以其性质稳定、H2O2含量高(36.2%)且释放可控等优点,在众多氧化反应中得到了广泛应用.对过氧化脲在氧化反应中的应用进行了总结和概述,重点介绍了环氧化、Baeyer-Villiger氧化、N-氧化、硫醚氧化成砜和亚砜、氧化卤化等反应.

关键词：过氧化脲环氧化 Baeyer-Villiger氧化 N-氧化砜亚砜氧化卤化

基于双流神经网络的煤矿井下人员步态识别方法

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矿业科学学报 2021年第2期6卷 218-227页

作者：刘晓阳刘金强郑昊琳中国矿业大学(北京)机电与信息工程学院北京100083

人脸、指纹和虹膜等生物识别方法在井下复杂环境限制下常常比较模糊,导致基于这些生物特征的煤矿井下人员身份识别率不高。本文在残差神经网络和栈式卷积自动编码器的基础上,提出了一种基于双流神经网络(TS-GAIT)的步态识别方法。主要... 详细信息

人脸、指纹和虹膜等生物识别方法在井下复杂环境限制下常常比较模糊,导致基于这些生物特征的煤矿井下人员身份识别率不高。本文在残差神经网络和栈式卷积自动编码器的基础上,提出了一种基于双流神经网络(TS-GAIT)的步态识别方法。主要利用残差神经网络提取步态模式中包含时空信息的动态特征,利用栈式卷积自动编码器提取包含生理信息的静态特征,并采用一种新颖的特征融合方法实现动态特征和静态特征的融合表征。提取的特征对角度、衣着和携带条件具有鲁棒性。在CASIA-B步态数据集和采集的煤矿工人步态数据集(CM-GAIT)上对该方法进行实验评估。结果表明,采用该方法进行煤矿井下人员步态识别是有效可行的,与其他步态识别方法相比准确率有显著提高。

关键词：煤矿井下人员步态识别栈式卷积自动编码器残差神经网络双流神经网络

B_4C/5083Al基复合材料的压缩性能

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热加工工艺 2016年第16期45卷 92-94页

作者：郝斌刘进强唐山学院环境与化学工程系河北唐山063000

利用液氮球磨+热压+热挤压方法制备了B_4C/5083Al基复合材料,对该材料的微观结构和压缩性进行研究。结果表明:B_4C颗粒基本均匀的分布于复合材料中,压缩强度可达到946.5 MPa。B_4C/5083复合材料经450℃×1 h、500℃×1 h、530℃×1 h和... 详细信息

利用液氮球磨+热压+热挤压方法制备了B_4C/5083Al基复合材料,对该材料的微观结构和压缩性进行研究。结果表明:B_4C颗粒基本均匀的分布于复合材料中,压缩强度可达到946.5 MPa。B_4C/5083复合材料经450℃×1 h、500℃×1 h、530℃×1 h和550℃×1 h热处理后,压缩断裂强度先升高后降低。去除团聚严重的B_4C颗粒后,该复合材料的压缩断裂强度可达982 MPa。

关键词：压缩性能液氮球磨 B4C/5083Al 复合材料