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| 1 | Behavior of noncircular tunnels excavated in stratified rock masses-Case of underground coal mines显示文摘The amount of tunnels excavated along stratified/sedimentary rock masses in Quangninh coal mine area,Vietnam, is gradually increasing. Rock mass in Quangninh is characterized by beddings between rock layers. The behavior of stratified rock masses surrounding the tunnels depends on both the intact rock and the beddings between rock layers. The main characteristics of stratified rock masses that need to be considered are their heterogeneity and anisotropy. Depending on the dip angle of rock layers, movements and failure zones developed surrounding the tunnels can be asymmetrical over the vertical axis of tunnel. This asymmetry causes adverse behaviors of the tunnel structures. The objective of this study is to highlight convergences and yielded zones developed in rock masses surrounding noncircular tunnels in Quangninh coal mine area using a finite element method. The presence of bedding joints is explicitly simulated. The numerical results indicated that with the increase in dip angle of bedding joints, the stress asymmetry over the tunnel vertical axis increases. It gradually leads to an asymmetry of the failure zone surrounding the tunnel. An increase of rock mass quality means a decrease of rock mass sensitivity to the discontinuities. In addition,a dip angle of the bedding joints of approximately 45° could be considered as the critical angle at which the rock mass mechanism changes between sliding and bending. | Ngoc Anh Do Daniel Dias Van Diep Dinh Tien Tung Tran Van Canh Dao Viet Doan Dao Phuc Nhan Nguyen | 2019 | Journal of Rock Mechanics and Geotechnical Engineering2019，11，1： | 9 |
| 2 | Reinforcement Learning Based Controller Synthesis for Flexible Aircraft Wings显示文摘Aeroelastic study of flight vehicles has been a subject of great interest and research in the last several years. Aileron reversal and flutter related problems are due in part to the elasticity of a typical airplane. Structural dynamics of an aircraft wing due to its aeroelastic nature are characterized by partial differential equations. Controller design for these systems is very complex as compared to lumped parameter systems defined by ordinary differential equations. In this paper, a stabilizing statefeedback controller design approach is presented for the heave dynamics of a wing-fuselage model. In this study, a continuous actuator in the spatial domain is assumed. A control methodology is developed by combining the technique of “proper orthogonal decomposition” and approximate dynamic programming. The proper orthogonal decomposition technique is used to obtain a low-order nonlinear lumped parameter model of the infinite dimensional system. Then a near optimal controller is designed using the single-network-adaptive-critic technique. Furthermore,to add robustness to the nominal single-network-adaptive-critic controller against matched uncertainties, an identifier based adaptive controller is proposed. Simulation results demonstrate the effectiveness of the single-network-adaptive-critic controller augmented with adaptive controller for infinite dimensional systems. | Manoj Kumar Karthikeyan Rajagopal Sivasubramanya Nadar Balakrishnan Nhan T.Nguyen | 2014 | IEEE/CAA Journal of Automatica Sinica2014，1，4： | 4 |
| 3 | Bi-Objective Optimal Control Modification Adaptive Control for Systems with Input Uncertainty显示文摘This paper presents a new model-reference adaptive control method based on a bi-objective optimal control formulation for systems with input uncertainty. A parallel predictor model is constructed to relate the predictor error to the estimation error of the control effectiveness matrix. In this work, we develop an optimal control modification adaptive control approach that seeks to minimize a bi-objective linear quadratic cost function of both the tracking error norm and the predictor error norm simultaneously. The resulting adaptive laws for the parametric uncertainty and control effectiveness uncertainty are dependent on both the tracking error and the predictor error, while the adaptive laws for the feedback gain and command feedforward gain are only dependent on the tracking error. The optimal control modification term provides robustness to the adaptive laws naturally from the optimal control framework. Simulations demonstrate the effectiveness of the proposed adaptive control approach. | Nhan T.Nguyen Sivasubramanya N.Balakrishnan | 2014 | IEEE/CAA Journal of Automatica Sinica2014，1，4： | 3 |
| 4 | Polarization sensitive optical coherence tomography with single input for imaging depth-resolved collagen organizations显示文摘Collagen organization plays an important role in maintaining structural integrity and determining tissue function.Polarization-sensitive optical coherence tomography(PSOCT)is a promising noninvasive three-dimensional imaging tool for mapping collagen organization in vivo.While PSOCT systems with multiple polarization inputs have demonstrated the ability to visualize depth-resolved collagen organization,systems,which use a single input polarization state have not yet demonstrated sufficient reconstruction quality.Herein we describe a PSOCT based polarization state transmission model that reveals the depth-dependent polarization state evolution of light backscattered within a birefringent sample.Based on this model,we propose a polarization state tracing method that relies on a discrete differential geometric analysis of the evolution of the polarization state in depth along the Poincare sphere for depth-resolved birefringent imaging using only one single input polarization state.We demonstrate the ability of this method to visualize depth-resolved myocardial architecture in both healthy and infarcted rodent hearts(ex vivo)and collagen structures responsible for skin tension lines at various anatomical locations on the face of a healthy human volunteer(in vivo). | Peijun Tang Mitchell A.Kirby Nhan Le Yuandong Li Nicole Zeinstra G.Nina Lu Charles E.Murry Ying Zheng Ruikang K.Wang | 2021 | Light(Science & Applications)2021，10，12： | 2 |
| 5 | The p17 cleaved form of caspase-3 is present within viable macrophages in vitro and in atherosclerotic plaque显示文摘 | Nhan T Q Liles W C Chait A | 2003 | Arterioscler Thromb Vasc Biol2003，23，7： | 1 |
| 6 | Performance evaluation of the body fluid mode on the platform Sysmex XE-5000 series automated hematology analyzer显示文摘 | PARIS A NHAN T CORNET E | | 0，，05： | 1 |
| 7 | Detection of Zika virus in saliva 显示文摘 | MUSSO D ROCHE C NHAN TX | 2015 | J Clin Virol2015，68，： | 1 |
| 8 | Performance evaluation of the body fluid mode on the platform Sysmex XE-5000 series automated hema- tology analyzer显示文摘 | Paris A Nhan T Comet E | 2010 | Int J Lab Hematol2010，32，5： | 1 |
| 9 | Drug delivery to the brain by fo- cused ultrasound induced blood-brain barrier disruption: quantitative evaluation of enhanced permeability of cerebral vasculature using two- photon microscopy显示文摘 | Nhan T Burgess A Cho EE | 2013 | J Control Release2013，172，1： | 1 |
| 10 | Spatio- temporal distribution of flee phenology and cropping systems in the Mekong Delta with special reference to the seasonal water flow of the Mekong and Bassae rivers 显示文摘 | TOSHIHIRO S NHAN V N HIROYUKI O | 2006 | Remote Sensing of Environment2006，100，： | 1 |
| 11 | Autoinducer of virulence as a target for vaccine and therapy against Staphylococcus aureus显示文摘 | Naomi Balaban Goldkorn T Nhan RT | 1998 | Science1998，280，： | 1 |
| 12 | A statistical approach for evaluating inherent benign-ness of chemical process routes in early design stages显示文摘 | Srinivasan R Nhan N T | 2008 | Process Safety and Environmental Protection2008，86，3： | 1 |
| 13 | Detection of Zika virus in saliva显示文摘 | Musso D Roche C Nhan TX | 2015 | J Clin Virol2015，，68： | 1 |
| 14 | Performance evaluation of the body fluid mode on the platform Sysmex XE-5000 series automated hema- tology analyzer显示文摘 | Paris A Nhan T Comet E et ~l | 2010 | Int J Lab Hematol2010，32，5： | 1 |
| 15 | A statistical approach for evaluating inherent benign-hess ol chemical process routes in early design stages 显示文摘 | Srinivasan R Nhan N T | 2008 | Process Safety and Environmental Protection2008，86，3： | 1 |
| 16 | A statistical approach for evaluating inherent benignness of chemical process routes in early design stages显示文摘 | Srinivasan R Nhan N T | 2008 | Process Safety and Environment Protection2008，86，： | 1 |
| 17 | Spatio–temporal distribution of rice phenology and cropping systems in the Mekong Delta with special reference to the seasonal water flow of the Mekong and Bassac rivers显示文摘 | Toshihiro Sakamoto Nhan Van Nguyen Hiroyuki Ohno Naoki Ishitsuka Masayuki Yokozawa | 2005 | Remote Sensing of Environment2005，，1： | 1 |
| 18 | Nurse practitioners in the Northern Alberta Renal Program显示文摘 | Nhan J Zuidema S | 2007 | CANNTJ2007，17，2： | 1 |
| 19 | An enhanced cooperative spectrum sensing scheme based on evidence theory and reliability source evaluation in cognitive radio context显示文摘 | NHAN N T INSOO K | 2009 | IEEE Communications Letters2009，13，7： | 1 |
| 20 | Optimal control modification for robust adaptive control with large adaptive gain显示文摘 | NHAN T N | | 0，，4： | 1 |
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