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Effects of Material and Dimension on TCF,Frequency,and Q of Radial Contour Mode AlN-on-Si MEMS Resonators

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Journal of Electronic Science and Technology 2021年第4期19卷 319-334页

作者： Thi Dep ha with the Faculty of Electronics Technology Industrial University of Ho Chi Minh CityHo Chi Minh City 70000

This paper investigates the effects of material and dimension parameters on the frequency splitting,frequency drift,and quality factor(Q)of aluminium nitride(AlN)-on-n-doped/pure silicon(Si)microelectromechanical systems(MEMS)disk resonators through analysis and *** parameters include the crystallographic orientation,dopant,substrate thickness,and *** resonators operate in the elliptical,higher order,and flexural *** simulation results show that i)the turnover points of the resonators exist at 55°C,-50°C,40°C,and-10°C for n-doped silicon with the doping concentration of 2×1019 cm-3 and the Si thickness of 3.5μm,and these points are shifted with the substrate thickness and mode variations;ii)compared with pure Si,the modal-frequency splitting for n-doped Si is higher and increases from 5%to 10%for all studied modes;iii)Q of the resonators depends on the temperature and ***,the turnover,modal-frequency splitting,and Q of the resonators depend on the thickness and material of the substrate and the *** work offers an analysis and design platform for high-performance MEMS gyroscopes as well as oscillators in terms of the temperature compensation by n-doped Si.

关键词： Anisotropic contour mode doping gyroscope microelectromechanical systems(MEMS)resonator piezoelectric temperature coefficient of frequency(TCF) temperature compensation thin-film piezoelectric-on-substrate(TPoS)

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Gold nanostructure based LSPR biosensors

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Gold nanostructure based LSPR biosensors

Current state-of-the-art review of footwear–ground friction

第十一次中国生物物理学术大会暨第九届全国会员代表大会

作者： ha minh Hiep Eiichi Tamiya Department of Applied Physics Osaka University

＜正＞The localized surface plasmon resonance（LSPR）of noble metal nanoparticles have been described in numerous *** in the peak intensity and wavelength of plasmon

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Friction 2024年第10期12卷 2188-2204页

作者： David REBENDA Tomáš SÁha Footwear Research Centre University InstituteTomas Bata University in ZlinZlin 76001Czech Republic Faculty of Mechanical Engineering Brno University of TechnologyBron 61600Czech Republic

The most important role of footwear is to ensure safe,functional walking,and foot *** the proper functionality of not only the work shoes,the anti-slip behavior of the shoe under various conditions and environments plays an important role in the prevention of slips,trips,falls,and consequent *** article is intended to review the current understanding of the frictional mechanisms between shoe outsoles and various counterfaces that impact the evaluation of outsole *** research focuses on the mechanisms driving outsole friction on different ground surfaces or the definition and description of parameters that influence outsole ***,the review discusses the effect of various surface contaminants on footwear ***,challenges and outlooks in the field of footwear outsoles are briefly mentioned.

关键词： shoe outsole composite slipperiness coefficient of friction(COF) adhesion safe walk

Some remarks on the genericity of unique range sets for meromorphic functions

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Science China Mathematics 2005年第Z1期48卷 262-267页

作者： ha Huy Khoai Institute of Mathematics 18 Hoang Quoc Viet 10307HanoiVietnam

In this paper we relate the study of unique range sets for meromorphic functions (URSM) with the hyperbolic hypersurfaces and give some remarks on the genericity of unique range sets for meromorphic functions.

关键词： unique range set for meromorphic functions, hyperbolic surface.

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血清标记物联合检测在原发性肝癌诊断中的临床价值

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血清标记物联合检测在原发性肝癌诊断中的临床价值

作者： PhaN ha minh（潘河明）吉林大学

学位级别：硕士

背景与目的：肝癌在中国发病率高，严重影响生存质量。但是如果能早期诊断，早期治疗，则治愈率和生存率都会有显著提高。目前国际上对肝癌的检测手段多种多样，其中以AFP、彩超诊断等被广泛接受，但不同国家和地区的检测是不同的。本... 详细信息

背景与目的：肝癌在中国发病率高，严重影响生存质量。但是如果能早期诊断，早期治疗，则治愈率和生存率都会有显著提高。目前国际上对肝癌的检测手段多种多样，其中以AFP、彩超诊断等被广泛接受，但不同国家和地区的检测是不同的。本研究将探讨三种检验的单独或联合检验的临床价值分析。AFP与AFP-L3%、GP73在健康人，原发性肝癌，肝硬化和各种其他病患者中的表达情况及联合检测曲线初步探讨在中国人群中的表达情况以及其在HCC中的诊断价值。期望能够提高更有效的诊断依据。资料与方法：采集血样标本248例，来自吉林大学第一医院2011年12月至2013年03月间住院患者作为研究对象，具有男性181例，女性67例，26-85岁，平均57±10.5岁。其中30例健康人组，肝癌组119例，肝硬化组71例及其他对照丙组28例（包括7例乙型肝炎，3例丙型肝炎，1例自身免疫性肝炎，5例胆囊炎，9例肝转移癌，3例肝血管瘤）。酶联免疫吸附法（ELISA)检测各组AFP、GP73的表达情况，应用甲胎蛋白异质体亲和吸附离心管洗脱获得AFP-L3,计算AFP-L3在总AFP中的比率。采用卡方检验,用Anova检验，用Kruskal-Wallis检验，用Spearman秩相关系数方法对数据进行分组分析。分析过程使用SPSS19.0软件。结果： 1.四组患者血清中AFP，AFP-L3%与GP73含量经方差分析比较，差异有统计学意义（p<0.01）。AFP、AFP-L3%、GP73在肝癌组为显著高于肝硬化组、丙组和健康组，差异有统计意义（p<0.01）。本研究肝癌患者的肿瘤直径大多数，而血清AFP-L3%的检测与肝癌患者的肿瘤直径R(s)为0.192，p值<0.05，所以它们之间有显相关关系。BCLC分级与AFP、AFP-L3%的检测相关来看有R(s)分别为0.187（p <0.05）、0.2606（p <0.01）。 2. AFP、AFP-L3%与GP73诊断肝癌的AUROC分别为0.831、0.738、0.759（p<0.01）。在此临界值下AFP、AFP-L3%与GP73诊断肝癌的敏感度分别为85.7%、58.0%与69.7%和特异度分别为72.9%、87.6%与76.7%。 3.采用AFP、AFP-L3%与GP73平行试验联合检测法,可以提高检测的敏感性95.8%及阴性预测值93.8%。采用AFP、GP73与AFP-L3%系列试验联合检测法,可以则提高了检测的特异性93.8%和阳性预测值84.3%。结论：1、原发性肝细胞癌患者血清AFP、AFP-L3%与GP73水平均高于肝硬化患者及乙型肝炎、丙型肝炎、自身免疫性肝炎、肝转移癌、肝血管瘤患者与健康对照。2、血清AFP-L3%检测与肝癌患者的肿瘤大小有相关关系。血清AFP-L3%水平越升高、肿瘤直径越长大。3、血清AFP、AFP-L3%检测与BCLC分级有相关关系。AFP、AFP-L3%标记物的价值越升高、患者的BCLC分级越重。4、AFP-L3%与GP73均可作为诊断肝癌的血清标记物，而跟AFP三者联合检测具有更高的敏感度和特异度，其可提高肝癌的诊断率。

关键词：原发性肝癌甲胎蛋白甲胎蛋白异质体高尔基体膜蛋白73 肿瘤标记物

Estimation of Land Use Changes in Tan Rai Bauxite Mine by Multi-Variants Change Vector Analysis (MCVA) on Multi-Temporal Remote Sensing Data

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Journal of Geoscience and Environment Protection 2020年第3期8卷 70-84页

作者： Nguyen Thanh Hoan Hoa Thuy Quynh le minh hang Nguyen Manh ha Hoang Thi Huyen Ngoc Dang Xuan Phong Institute of Geography Vietnam Academy of Science and Technology Hanoi Vietnam Graduate University of Science and Technology Vietnam Academy of Science and Technology Hanoi Vietnam le Quy Don Technical University Hanoi Vietnam

The Tan Rai Bauxite Project, which exploits a large bauxite mine in Lam Dong province, Vietnam has been in operation since 2012. In addition to the economic efficiency of the project, bauxite mining and processing uses a large area arable land and affect the regional environment. Remote sensing technology is increasingly widely used in many purposes in monitoring the changes of environment and resources, including land use change with high accuracy, giving managers more information to monitor the exploitation and use process of land resource. This study used a Change Vector Analysis (CVA) method of analysis on various remote sensing data sources to monitor the process of land exploitation and restoration of the Tan Rai Bauxite project. High-resolution remote sensing images were used as diverse as SPOT-5, VNREDSat-1, Google Earth from 2013 to 2019 to demonstrate the ability of the MCVA method to combine many other types of remote sensing images together. The results of fluctuation analysis were validated by 200 random points in the study area, and the accuracy of result is more than 90%. The results of land use change statistics were also compared with the annual data of Tan Rai Bauxite Factory. From this study, it can be concluded that the MCVA analysis method can quickly detect land use change areas and can combine many different image sources with a high accuracy. In addition, it also provides statistics of mining areas and restored areas, thereby assisting managers in monitoring the operation of the mine.

关键词： Bauxite Tan Rai MCVA Land Use Change Monitoring Multi-Sensors

Ethyl acetate extract of Smilax glabra Roxb roots and its major active compound astilbin promote osteoblastogenesis in vitro by upregulating bone cell differentiation-associated genes

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Asian Pacific Journal of Tropical Biomedicine 2021年第12期11卷 553-560页

作者： Huyen T.T.Nguyen minh T.H.Nguyen Thu X.Nguyen Quan M.Pham ha X.Nguyen Phuong T.M.Nguyen University of Science and Technology of hanoi Vietnam Academy of Science and TechnologyHanoiVietnam Institute of Biotechnology Vietnam Academy of Science and TechnologyHanoiVietnam Institute of Natural Products Chemistry Vietnam Academy of Science and TechnologyHanoiVietnam Graduate University of Science and Technology Vietnam Academy of Science and TechnologyHanoiVietnam

Objective:To investigate the osteoblastogenic activity of the ethyl acetate(EtOAc)extract of Smilax glabra Roxb roots and its major active compound ***:Astilbin was isolated from EtOAc extract using silica gel chromatography combined with fraction *** structure of astilbin was determined by analysis of the spectroscopic data in comparison with the *** method was used to detect the *** phosphatase(ALP)activity was determined by the spectrophotometric method at 405 nm using p-nitrophenyl phosphate as a *** deposition was stained with alizarin red-S,distained with cetylpyridium chloride,and quantified at 562 *** silico model for astilbin-ALP interaction was analyzed using AutoDock *** changes in expression of osteoblast differentiation related genes were determined using quantitative real-time ***:Both the EtOAc extract and astilbin had no toxicity toward osteoblast MC3T3-E1 cells at 5.0,10,25,and 50μg/*** 25μg/mL,they enhanced ALP activity and mineralization of osteoblasts up to 30%and 55%for the EtOAc extract and 22%and 41%for astilbin,*** docking analysis of astilbin-ALP interaction revealed Arg167,Asp320,His324,and His437 were key residues participating in hydrophobic interaction;meanwhile,His434 and Thr436 residues were involved in hydrogen bond formation in the active site of human tissue-nonspecific ***,the expression level of genes opn,col1,osx,and runx2 were up-regulated in astilbin treated samples with the fold changes as 2.2;3.7;4.1;2.3,respectively at 10μg/mL(P<0.05).Conclusions:The EtOAc extract and its major compound astilbin exhibit osteoblastogenic activity by up-regulating important markers for bone cell *** could be a new and promising osteogenic agent with dual actions for therapeutic applications.

关键词： Smilax glabra Roxb Astilbin Cytotoxicity Osteogenesis Osteoblast Ethyl acetate extract

Support vector machine based machine learning method for GS 8QAM constellation classification in seamless integrated fiber and visible light communication system

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Science China(Information Sciences) 2020年第10期63卷 182-193页

作者： Wenqing NIU Yinaer ha Nan CHI Key Laboratory for Information Science of Electromagnetic Waves (MoE) Fudan University

Visible light communication(VLC) network over optical fiber has become a potential candidate in ultra-high speed indoor wireless communication. To mitigate signal distortion accumulated in optical fiber and VLC channel, we present to utilize support vector machine(SVM) for constellation classification in two kinds of geometrically-shaped 8 QAM(quadrature amplitude modulation) seamless integrated fiber and VLC system. We introduce 4 sub-bands to simulate multi-user. Experimental results show that system performance can be significantly improved, and transmission at-2.5 dB m input optical power under 7%forward error correction(FEC) threshold can be realized employing Circular(7, 1) geometrically-shaped8 QAM and SVM. At overall capacity of 960 Mbps, Q-factor increases by up to 11.5 dB.

关键词： visible light communication VLC support vector machine SVM geometrically shaping GS VLC network constellation classification

Bandwidth Allocation Based on Declared UPC Parameters in ATM Networks

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Bandwidth Allocation Based on Declared UPC Parameters in ATM...