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Tuning F-doped degree of rGO:Restraining corrosion-promotion activity of EP/rGO nanocomposite coating

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Journal of Materials Science & Technology 2020年第9期44卷 121-132页

作者： Lu shen Yong Li Wenjie Zhao Kui Wang Xiaojing Ci Yangmin Wu Gang Liu Chao Liu zhiwen Fang Key Laboratory of Marine Materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingbo Institute of Materials Technology and EngineeringChinese Academy of ScienceNingbo315201China Public Technology Service Center Ningbo Institute of Materials Technology and EngineeringChinese Academy of ScienceNingbo315201China Engineering Technology Research Center of Fluorocarbon Materials Shandong Zhongshan Photoelectric Materials Co.Ltd.Zibo255138China

Given that graphene features high electrical conductivity,it is a kind of material with corrosion-promotion *** study aimed to inhibit the corrosion-promotion activity of graphene in ***,we report an exciting application of epoxy matrix(EP)/F-doped reduced graphene oxide(rGO)coatings for the long-term corrosion protection of *** synthesized F-doped rGO(FG)did not reduce the utilization of rGO by a wide margin and possessed distinctive electrically insulating *** electrical conductivity of rGO was approximately 1500 S/m,whereas those of FG-1,FG-2 and FG-3 were 1.17,5.217×10^−2 and 3.643×10^-11 S/m,*** and rGO were then dispersed into epoxy *** chemical structures of rGO and FG were investigated by transmission electron microscopy(TEM),scanning probe microscopy(SPM),X-ray photoelectron spectroscopy(XPS),Fourier-transform infrared spectroscopy(FTIR),and X-ray diffraction(XRD).EP/FG coatings exhibited outstanding corrosion protection in comparison with blank EP and EP/rGO coatings mainly because the corrosion-promotion effect of rGO was *** anticorrosion ability of EP/FG coatingswasimproved with increased F-doped degree of *** addition,electrochemical impendance spectroscopy(EIS)results indicated that the Rc values of EP/FG-2 and EP/FG-3 were four orders of magnitude higher than those of EP/rGO in diluent NaCl solution(3.5 wt.%)after immersion for 90 days.

关键词： Graphene F-doped rGO Electrically insulating nanofillers Long-term anticorrosion

The study of estimation method of broadband emissivity from EOS/MODIS data

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High Technology Letters 2014年第1期20卷 88-91页

作者：毛克彪 Ma Ying shen Xinyi Sun zhiwen He Tianjue Xia Lang Xu Tongren National Hulunber Grassland Ecosystem Observation and Research Station Institute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural Sciences Guangzhou Institute of Geography Department of Geography University of Toronto Hydrometeorology and Remote Sensing Laboratory The University of Oklahoma Institute No.503 of China Academy of Space Technology State Key Laboratory of Remote Sensing Science School of GeographyBeijing Normal University

The broadband emissivity is an important parameter for estimating the energy balance of the Earth. This study focuses on estimating the window （8 -12 μm） emissivity from the MODIS （mod- erate-resolution imaging spectroradiometer） data, and two methods are built. The regression method obtains the broadband emissivity from MODllB1 - 5KM product, whose coefficient is developed by using 128 spectra, and the standard deviation of error is about 0.0118 and the mean error is about O. 0084. Although the estimation accuracy is very high while the broadband emissivity is estimated from the emissivity of bands 29, 31 and 32 obtained from MOD11B1 _ 5KM product, the standard deviations of errors of single emissivity in bands 29, 31, 32 are about 0.009 for MOD11B1 5KM product, so the total error is about O. 02 and resolution is about 5km × 5km. A combined radiative transfer model with dynamic learning neural network method is used to estimate the broadband emis- sivity from MODIS 1B data. The standard deviation of error is about 0.016, the mean error is about 0.01, and the resolution is about 1 km x 1 km. The validation and application analysis indicates that the regression is simpler and more practical, and estimation accuracy of the dynamic learning neural network method is higher. Considering the needs for accuracy and practicalities in application, one of them can be chosen to estimate the broadband emissivity from MODIS data.

关键词： moderate-resolution imaging spectroradiometer (MODIS) broadband emissivity land surface temperature

上海中心城区50岁以上人群心房颤动患病率调查及风险分析

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大连医科大学学报 2017年第3期39卷 237-241页

作者：俞帅张雁丁玎郭起浩赵倩华沈志文洪震王骏孙育民复旦大学附属静安区中心医院(筹)心内科上海200040 复旦大学附属华山医院神经病学研究所上海200040

目的获得上海市中心城区50岁以上人群心房颤动的患病率及其相关的危险因素。方法对社区50岁以上人群进行问卷调查及心电图检查,对其生活习惯、疾病史及房颤发病率进行统计。应用单因素和多因素Logistic回归分析房颤的危险因素。结果共... 详细信息

目的获得上海市中心城区50岁以上人群心房颤动的患病率及其相关的危险因素。方法对社区50岁以上人群进行问卷调查及心电图检查,对其生活习惯、疾病史及房颤发病率进行统计。应用单因素和多因素Logistic回归分析房颤的危险因素。结果共计入选50岁以上人群3804人。男性1691人,占总人群的44.4%。平均年龄(70.6±8.84)岁。调查明确诊断房颤患者130例,房颤患病率为3.42%,其中男性3.55%,女性3.31%,男女差异无统计学意义(P=0.69)。随着年龄的增长,无论男女,房颤的患病率逐渐升高。Logistic多因素回归分析显示,年龄(OR=1.05,95%CI 1.02-1.07)、既往有冠心病(OR=5.44,95%CI 3.60-8.22)或瓣膜病(OR=5.90,95%CI 2.36-14.77)为房颤的危险因素,P均<0.05。结论上海中心城区(静安区)50岁以上人群房颤患病率较高,高龄、冠心病或瓣膜病患者更易发生房颤。

关键词：流行病学心房颤动患病率调查

Segmentation of field grape bunches via an improved pyramid scene parsing network

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International Journal of Agricultural and Biological Engineering 2021年第6期14卷 185-194页

作者： Shan Chen Yuyang Song Jinya Su Yulin Fang Lei shen zhiwen Mi Baofeng Su College of Mechanical and Electronic Engineering Northwest A&F UniversityYangling 712100ShaanxiChina Key Laboratory of Agricultural Internet of Things Ministry of Agriculture and Rural AffairsYangling 712100ShaanxiChina Shaanxi Key Laboratory of Agricultural Information Perception and Intelligent Services Yangling 712100ShaanxiChina College of Enology Northwest A&F UniversityYangling 712100ShaanxiChina School of Computer Science and Electronic Engineering University of EssexColchesterCO43SQUK

With the continuous expansion of wine grape planting areas,the mechanization and intelligence of grape harvesting have gradually become the future development *** order to guide the picking robot to pick grapes more efficiently in the vineyard,this study proposed a grape bunches segmentation method based on Pyramid Scene Parsing Network(PSPNet)deep semantic segmentation network for different varieties of grapes in the natural field *** this end,the Convolutional Block Attention Module(CBAM)attention mechanism and the atrous convolution were first embedded in the backbone feature extraction network of the PSPNet model to improve the feature extraction ***,the proposed model also improved the PSPNet semantic segmentation model by fusing multiple feature layers(with more contextual information)extracted by the backbone *** improved PSPNet was compared against the original PSPNet on a newly collected grape image dataset,and it was shown that the improved PSPNet model had an Intersection-over-Union(IoU)and Pixel Accuracy(PA)of 87.42%and 95.73%,respectively,implying an improvement of 4.36%and 9.95%over the original PSPNet *** improved PSPNet was also compared against the state-of-the-art DeepLab-V3+and U-Net in terms of IoU,PA,computation efficiency and robustness,and showed promising *** is concluded that the improved PSPNet can quickly and accurately segment grape bunches of different varieties in the natural field environments,which provides a certain technical basis for intelligent harvesting by grape picking robots.

关键词： grape bunches semantic segmentation deep learning improved PSPNet

化学发光法与免疫印迹法检测抗SSA和SSB抗体的临床对比研究

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国际检验医学杂志 2018年第15期39卷 1845-1848,1852页

作者：吕志文申爱华陈小三柳乐李庆春李纪阳湖北省洪湖市中医院检验科湖北洪湖433200 济宁医学院附属医院检验科山东济宁272000 江苏省免疫诊断工程技术研究中心江苏苏州215123

目的比较化学发光法(CLIA)与免疫印迹法(LIA)针对抗SSA和SSB抗体的临床检测性能。方法应用CLIA和LIA对255例系统性红斑狼疮(SLE)、34例干燥综合征(SjS)、40例类风湿关节炎(RA)、25例系统性硬化症(SSc)及60例体检对照(HI)样本开展抗SSA和... 详细信息

目的比较化学发光法(CLIA)与免疫印迹法(LIA)针对抗SSA和SSB抗体的临床检测性能。方法应用CLIA和LIA对255例系统性红斑狼疮(SLE)、34例干燥综合征(SjS)、40例类风湿关节炎(RA)、25例系统性硬化症(SSc)及60例体检对照(HI)样本开展抗SSA和SSB抗体平行检测。比较两种方法抗SSA和SSB抗体的检测性能和符合率。并对两种方法检测结果的差异样本,采用第三种检测方法(ELISA)进行对比复测。结果两种方法检测抗SSA抗体时,总符合率为96.3%(Kappa=0.92,P<0.01)。而在抗SSB抗体则为95.8%(Kappa=0.85,P<0.01)。两种方法的差异样本(包括抗SSA和SSB抗体)合计33例,其中21例样本ELISA复测结果与CLIA检测结果相符合。结论 CLIA与LIA在检测抗SSA和SSB抗体时具有良好的符合率和一致性。由于具备全自动、定量检测和随机上样等显著特点,因此CLIA更适合临床抗SSA和SSB抗体检测。

关键词：化学发光法抗SSA抗体抗SSB抗体系统性红斑狼疮干燥综合征免疫印迹法

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胰岛素瘤切除术围手术期血糖监测的临床意义

岭南现代临床外科 2013年第3期13卷 202-204页

作者：郭明炎傅艳妮赵一凡傅钢兰沈智文胡楚文中山大学孙逸仙纪念医院麻醉科广州510120

目的探讨胰岛素瘤切除术的围术期管理。方法回顾性分析本院5年来通过手术治疗胰岛素瘤患者的临床资料。结果 18例患者中男6例,女12例,均有典型的Whipple三联征。15例行开放性肿瘤切除术,3例行腹腔镜下肿瘤切除术。开腹手术采用硬膜外麻... 详细信息

目的探讨胰岛素瘤切除术的围术期管理。方法回顾性分析本院5年来通过手术治疗胰岛素瘤患者的临床资料。结果 18例患者中男6例,女12例,均有典型的Whipple三联征。15例行开放性肿瘤切除术,3例行腹腔镜下肿瘤切除术。开腹手术采用硬膜外麻醉复合气管内全麻,腹腔镜手术采用单纯气管内全麻。根据术中不同的血糖管理方式将患者分为两组:持续泵注组(C组,n=10)术中静脉泵注50%葡萄糖溶液,根据血糖调节输注速度,维持血糖在3.0～6.0mmol·L-1;非持续泵注组(NC组,n=8)未予持续泵注葡萄糖,仅在血糖低于2.8mmol·L-1时才静脉推注50%葡萄糖50mL。术中每隔15分钟监测一次血糖,肿瘤切除前30min停止给糖。所有患者术中患者生命体征平稳。持续泵注葡萄糖组肿瘤切除前后血糖控制较非持续泵注稳定(P<0.05)。结论胰岛素瘤手术时采用持续泵注葡萄糖能够稳定手术过程中血糖水平,肿瘤切除前静脉泵注50%葡萄糖可以避免肿瘤切除前后血糖急剧波动。

关键词：胰岛素瘤围手术期管理全身麻醉血糖持续静脉泵注

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药物流行病学研究中的一次数据源介绍

药物流行病学杂志 2021年第3期30卷 151-154页

作者：卓琳贾敏沈智文张灵健王俊彦孙凤王巍巍宫建詹思延北京大学第三医院临床流行病学研究中心北京100191 沈阳药科大学药物流行病与临床药物评价课题组中国医科大学北部战区总医院和平院区学院药学部北京大学公共卫生学院流行病与卫生统计学系首都医科大学附属北京安定医院国家精神心理疾病临床医学研究中心

健康医疗数据是开展药物流行病学研究的基石,为药物使用、疾病防控、健康管理规划提供支撑。本研究以《中国药物流行病学研究方法学指南》为基础,从数据源和数据收集方法概述、国内外数据源现状、存在的问题、相应解决方案、案例分析等... 详细信息

健康医疗数据是开展药物流行病学研究的基石,为药物使用、疾病防控、健康管理规划提供支撑。本研究以《中国药物流行病学研究方法学指南》为基础,从数据源和数据收集方法概述、国内外数据源现状、存在的问题、相应解决方案、案例分析等方面进行系统综述,介绍药物流行病学研究中一次数据及数据收集方法的特点,为开展药物流行病学研究时恰当地选择数据源及研究方法提供参考依据。

关键词：药物流行病学数据源一次数据数据采集

Quick identification of ABC trilayer graphene at nanoscale resolution via a near-field optical route

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Materials Futures 2023年第1期2卷 158-166页

作者： Peiyue shen Xianliang Zhou Jiajun Chen Aolin Deng Bosai Lyu Zhichun Zhang Shuo Lou Saiqun Ma Binbin Wei zhiwen Shi Key Laboratory of Artificial Structures and Quantum Control(Ministry of Education) Shenyang National Laboratory for Materials ScienceSchool of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093People’s Republic of China Institute of System Engineering Beijing 100191People’s Republic of China

ABC-stacked trilayer graphene has exhibited a variety of correlated phenomena owing to its relatively flat bands and gate-tunable ***,convenient methods are still lacking for identifying ABC graphene with nanometer-scale *** we demonstrate that the scanning near-field optical microscope working in ambient conditions can provide quick recognition of ABC trilayer graphene with no ambiguity and excellent resolution(∼20 nm).The recognition is based on the difference in their near-field infrared(IR)responses between the ABA and ABC *** show that in most frequencies,the response of the ABC trilayer is weaker than the ABA ***,near the graphene phonon frequency(∼1585 cm−1),ABC’s response increases dramatically when gated and exhibits a narrow and sharp Fano-shape resonant line,whereas the ABA trilayer is largely ***,the IR contrast between ABC and ABA becomes reversed and can even be striking(ABC/ABA∼3)near the graphene phonon *** observed near-field IR features can serve as a golden rule to quickly distinguish ABA and ABC trilayers with no ambiguity,which could largely advance the exploration of correlation physics in ABC-stacked trilayer graphene.

关键词： ABC trilayer graphene identification SNOM nanoscale Fano resonance

Fabrication of kW-level chirped and tilted fiber Bragg gratings and filtering of stimulated Raman scattering in high-power CW oscillators

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High Power Laser Science and Engineering 2019年第2期7卷 76-82页

作者： Kerong Jiao Jian Shu Hua shen zhiwen Guan Feiyan Yang Rihong Zhu MIIT Key Laboratory of Advanced Solid Laser Nanjing University of Science and TechnologyNanjing 210094China School of Electronic Engineering and Optoelectronic Technology Nanjing University of Science and Technology.Nanjing 210094.China

Suppression of stimulated Raman scattering(SRS)by means of chirped and tilted fiber Bragg gratings(CTFBGs)has become a key ***,research on high-power systems is still lacking due to two ***,after the inscription,there are a large number of hydroxyl compounds and hydrogen molecules in CTFBGs that cause significant heating due to their strong infrared ***,CTFBGs can couple Stokes light from the core to the cladding and the coating,which causes serious heating in the coating of the *** at overcoming these bottlenecks,a process that combines constant-low-temperature and variable-high-temperature annealing is used to reduce the thermal slope of the ***,a segmented-corrosion cladding power stripping technology is used on the CTFBG to remove the Stokes light which is coupled to the cladding,which solves the problem of overheating in the coating of the ***,a CTFBG with both a kilowatt-level power-carrying load and the ability to suppress SRS in a fiber laser has been ***,we establish a kW-level CW oscillator to test the *** results demonstrate that the power-carrying load of the CTFBG is close to 1 kW,the thermal slope is lower than 0.015 ℃/W,and the SRS suppression ratio is nearly 23 dB.

关键词： chirped and tilted fiber Bragg gratings fiber optics components high-power fiber laser stimulated Raman scattering