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Investigation of corneal topographic and densitometric properties of Wilson's disease patients with or without a Kayser-Fleischer ring

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Eye and Vision 2021年第2期8卷 67-74页

作者： Mehmet Fuat Alakus Mehtap Caglayan Nazım Ekin hasan Oncul Esref Arac Umut Dag halit diri Department of Ophthalmology University of Health SciencesDiyarbakir Gazi Yasargil Research and Training HospitalDiyarbakırTurkey Department of Internal Medicine University of Health SciencesDiyarbakir Gazi Yasargil Research and Training HospitalDiyarbakırTurkey

Background:To investigate the topographic measurements and densitometry of corneas in Wilson’s disease(WD)patients with or without a Kayser-Fleischer ring(KF-r)compared to healthy ***:This cross-sectional study included 20 WD patients without a KF-r(group I),18 WD patients with a KF-r(group II),and 20 age-matched controls(group III).The Pentacam high resolution imaging system is used to determine corneal topographic measurements and ***:Mean age for groups I,II and III was 25.40±6.43 years(14-36 years),25.38±6.96 years(16-39 years),23.60±6.56 years(17-35 years),respectively(P=0.623).There was no significant difference between the groups in terms of the anterior corneal densitometry values(P>0.05),while the 6-10mm and 10-12 mm mid stroma and the 2-6 mm,6-10 mm,and 10-12 mm posterior corneal densitometry values in group II were significantly higher than those in groups I and III(for all values,Phan those in group III(P=0.038).The central corneal thickness(CCT),thinnest corneal thickness(tCT),and corneal volume(CV)values in groups I and II were significantly lower than those in group III(for CCT values,P=0.011 and P=0.009;for tCT values,P=0.010 and P=0.005;for CV values,P=0.043 and P=0.029).Conclusion:In WD patients with a KF-r,corneal transparency decreased in the peripheral posterior and mid stromal corneal layers;for these patients,corneal transparency may be impaired not only in the peripheral cornea but also in the paracentral cornea.

关键词： Wilson Kayser-Fleischer ring Corneal densitometry

Non-expansive Mappings and Iterative Methods in Uniformly Convex Banach Spaces

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Acta Mathematica Sinica,English Series 2004年第5期20卷 829-836页

作者： ha|YunZHOU Dept.ofMath. ShijiazhuangMechanicalEngineeringCollegeShijiazhuang050003P.R.China

In this article,we will investigate the properties of iterative sequence for non-expansive mappings and present several strong and weak convergence results of successive approximations to fixed points of non-expansive mappings in uniformly convex Banach *** results presented in this article generalize and improve various ones concerned with constructive techniques for the fixed points of non-expansive mappings.

关键词： Non-expansive mapping Mann and lshikawa iteration schemes Convergence theorem Uniformly convex Banach space

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)

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

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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.

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

Discounted Iterative Adaptive Critic Designs With Novel Stability Analysis for Tracking Control

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IEEE/CAA Journal of Automatica Sinica 2022年第7期9卷 1262-1272页

作者： Mingming ha Ding Wang Derong Liu School of Automation and Electrical Engineering University of Science and Technology BeijingBeijing 100083China Faculty of Information Technology the Beijing Key Laboratory of Computational Intelligence and Intelligent Systemthe Beijing Laboratory of Smart Environmental Protectionand the Beijing Institute of Artificial IntelligenceBeijing University of TechnologyBeijing 100124China Department of Electrical and Computer Engineering University of Illinois at ChicagoChicago IL 60607 USA IEEE

The core task of tracking control is to make the controlled plant track a desired *** traditional performance index used in previous studies cannot eliminate completely the tracking error as the number of time steps *** this paper,a new cost function is introduced to develop the value-iteration-based adaptive critic framework to solve the tracking control *** the regulator problem,the iterative value function of tracking control problem cannot be regarded as a Lyapunov function.A novel stability analysis method is developed to guarantee that the tracking error converges to *** discounted iterative scheme under the new cost function for the special case of linear systems is ***,the tracking performance of the present scheme is demonstrated by numerical results and compared with those of the traditional approaches.

关键词： Adaptive critic design adaptive dynamic programming(ADP) approximate dynamic programming discrete-time nonlinear systems reinforcement learning stability analysis tracking control value iteration(VI)

The cross-section for the γe-→Ze-→l-l+e- scattering at the LHeC

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Chinese Physics C 2023年第2期47卷 82-87页

作者： Bui Thi ha Giang hanoi National University of Education 136 Xuan ThuyHanoiVietnam

A measurement of the Z production cross-section in γe^(-) collisions at the Large hadron^(-)electron Collider(LHeC) is presented for comparison to that at the International Linear Collider(ILC).The total cross-section depends strongly on the polarization of the initial and final e^(-)beams and the electron beam energy Ee;the energy of the proton beam was set to E_(p)=7 *** results show that the total cross^(-)section in γe^(-)→Ze^(-)→l^(-)l+e^(-) at the LHeC is much larger than that at the ILC.

关键词： Z production cross-section LHeC

Impact of Temperature Variation on Performance of Carbon Nanotube Field-Effect Transistor-Based on Chaotic Oscillator:A Quantum Simulation Study

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Chinese Physics Letters 2015年第3期32卷 141-144页

作者： Van ha Nguyen hanjung Song Department of Nanoscience and Engineering Center for Nano ManufacturingInje University

We evaluate the impact of temperature on the output behavior of a carbon nanotube field effect transistor （CNFET） based chaotic generator. The sources cause the variations in both current-voltage characteristics of the CNFET device and an overall chaotic circuit is pointed out. To verify the effect of temperature variation on the output dynamics of the chaotic circuit, a simulation is performed by employing the CNFET compact model of Wong et al. in HSPICE with a temperature range from -100℃ to 100℃. The obtained results with time series, frequency spectra, and bifurcation diagram from the simulation demonstrate that temperature plays a significant role in the output dynamics of the CNFET-based chaotic circuit. Thus, temperature-related issues should be taken into account while designing a high-quality chaotic generator with high stability.

关键词： CN Impact of Temperature Variation on Performance of Carbon Nanotube Field-Effect Transistor-Based on Chaotic Oscillator:A Quantum Simulation Study HSPICE MOSFET