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Wireless Sensor Network 2013年第5期5卷 91-104页

作者： Denis Dessales Noel Richard Anne-Marie Poussard Rodolphe Vauzelle Christophe Martinsons xlim Laboratory SIC departmentUniversity of PoitiersPoitiersFrance Department of Health and Comfort Centre Scientifique et Technique du BatimentSt Martin d’HèresFrance

In a sustainable development context, the monitoring systems are essential to study the building energy performances. With the recent technology advances, these systems can be based on wireless sensor networks, where the energy efficiency is the main design challenge. To this end, most of the studies focus on low power Medium Access Control (MAC) protocols to reduce the overall energy consumption of a network. Nevertheless, the performances assessment of these protocols is generally not performed in a realistic way, and does not take into account the performances of the other layers of the OSI model. In this paper, we propose a cross-layer methodology to assess the real performances of a MAC protocol by taking into account the traffic volume, the synchronization losses and more particularly the physical layer performances through a Bit Error Rate (BER) criterion. The simulation results demonstrate clearly the physical layer impact on a sensor lifetime. Finally, the proposal of an energy efficient MAC protocol for a wireless sensor network dedicated to an application of building monitoring is proposed.

关键词： WSN Physical Layer MAC Layer Energy Consumption Cross-Layer Analysis

Interferometer Based on a D-shape Chaotic Optical Fiber for Measurement of Multiparameters

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Photonic Sensors 2012年第4期2卷 381-384页

作者： Susana SILVA Luis COELHO Philippe ROY Orlando FRAZAO INESC Porto Rua do Campo Alegre 687 4169-007 Porto Portugal and Dept. de Fisica e Astronomia da Faculdade de Ciencias da Universiclacle do Porto Rua do Campo Alegre 687 4169-007 Porto Portugal xlim UMR 6172 CNRS-University of Limoges 123 Avenue Albert Thomas 87060 Limoges Cedex France

干涉仪基于为 multiparameters 的测量的 D 形状混乱光纤维被建议。察觉到的结构依靠了 D 形状纤维节在二 singlemode 纤维之间拼接并且在传播讯问了。光光谱被多重干扰损失山峰填写，它对折射索引，温度和 95.2 nm/RIU 的紧张最大值敏... 详细信息

干涉仪基于为 multiparameters 的测量的 D 形状混乱光纤维被建议。察觉到的结构依靠了 D 形状纤维节在二 singlemode 纤维之间拼接并且在传播讯问了。光光谱被多重干扰损失山峰填写，它对折射索引，温度和 95.2 nm/RIU 的紧张最大值敏感敏感， 10.5 pm/(

关键词：多参数测量单模光纤干涉仪混沌折射率灵敏度光学

Rotorcraft with a 3DOF Rigid Manipulator:Quaternion-based Modeling and Real-time Control Tolerant to Multi-body Couplings

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International Journal of Automation and computing 2018年第5期15卷 547-558页

作者： J.Alvarez-Munoz N.Marchand J.F.Guerrero-Castellanos J.J.Tellez-Guzman J.Escareno M.Rakotondrabe Polytechnic Institute of Advanced Sciences FR 94200 ParisFrance Univ.Grenoble Alpes GIPSA-LabFR-38000 GrenobleFrance Autonomous University of Puebla(BUAP) Faculty of ElectronicsMX 72570 PueblaMexico University of Limoges ENSIL-ENSCI XLIM Laboratory UMR CNRS 7252Parc Ester Technopole16 rue AtlantisLimoges 87068France FEMTO-ST Institute UMR CNRS-UFC/ENSMM/UTBMAutomatic Control and Micro-Mechatronic DepartmentFR BesanconFrance

This paper proposes a simple solution for the stabilization of a mini-quadcopter carrying a 3DoF（degrees of freedom） manipulator robot in order to enhance its achievable workspace and application profile. Since the motion of the arm induces torques which degrade the stability of the system, in the present work, we consider the stabilization of both subsystems： the quadcopter and the robotic arm. The mathematical model of the system is based on quaternions. Likewise, an attitude control law consisting of a bounded quaternion-based feedback stabilizes the quadcopter to a desired attitude while the arm is evolving. The next stage is the translational dynamics which is simplified for control（nonlinear） design purposes. The aforementioned controllers are based on saturation functions whose stability is explicitly proved in the Lyapunov sense. Finally, experimental results and a statistical study validate the proposed control strategy.

关键词： Observer-based control quaternion and Newton-Euler modeling bounded-input control aerial manipulator disturbancerejection.

Targeted Sub-Attomole Cancer Biomarker Detection Based on Phase Singularity 2D Nanomaterial-Enhanced Plasmonic Biosensor

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Nano-Micro Letters 2021年第6期13卷 284-294页

作者： Yuye Wang Shuwen Zeng Aurelian Crunteanu Zhenming Xie Georges Humbert Libo Ma Yuanyuan Wei Aude Brunel Barbara Bessette Jean-Christophe Orlianges Fabrice Lalloué Oliver GSchmidt Nanfang Yu Ho-Pui Ho Department of Biomedical Engineering The Chinese University of Hong KongShatinNew TerritoriesHong KongPeople’s Republic of China CNRS XLIM Research InstituteUMR 7252University of Limoges123Avenue Albert ThomasLimogesFrance Department of Applied Physics and Applied Mathematics Columbia UniversityNew York CityNYUSA Institute for Integrative Nanosciences IFW DresdenHelmholtzstr.20DresdenGermany Faculty of Medicine University of LimogesEA3842-CAPTuRGEIST2 rue du Dr MarclandLimogesFrance

Detection of small cancer biomarkers with low molecular weight and a low concentration range has always been challenging yet urgent in many clinical applications such as diagnosing early-stage cancer,monitoring treatment and detecting ***,a highly enhanced plasmonic biosensor that can overcome this challenge is developed using atomically thin two-dimensional phase change *** precisely engineering the configuration with atomically thin materials,the phase singularity has been successfully achieved with a significantly enhanced lateral position shift *** on our knowledge,it is the first experimental demonstration of a lateral position signal change>340μm at a sensing interface from all optical *** this enhanced plasmonic effect,the detection limit has been experimentally demonstrated to be 10^(-15) mol L^(−1) for TNF-α cancer marker,which has been found in various human diseases including inflammatory diseases and different kinds of *** as-reported novel integration of atomically thin Ge_(2)Sb_(2)Te_(5) with plasmonic substrate, which results in a phase singularity and thus a giant lateral position shift, enables the detection of cancer markers with low molecular weight at femtomolar level. These results will definitely hold promising potential in biomedical application and clinical diagnostics.

关键词： 2D nanomaterials Cancer marker detection Phase singularity Surface plasmon

High-resolution multimodal flexible coherent Raman endoscope

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Light(Science & Applications) 2018年第1期7卷 932-939页

作者： Alberto Lombardini Vasyl Mytskaniuk Siddharth Sivankutty Esben Ravn Andresen Xueqin Chen Jérôme Wenger Marc Fabert Nicolas Joly Frédéric Louradour Alexandre Kudlinski Hervé Rigneault Aix-Marseille Univ CNRSCentrale MarseilleInstitut FresnelMarseilleFrance Laboratoire de Physique des Lasers Atomes et Molécules UMR 8523CNRSUniversitéLille59000 LilleFrance CNRS XLIMUMR 7252Universitéde Limoges87060 LimogesFrance Department of Physics Max Planck Institute for the Science of LightUniversity of Erlangen Nuremberg91058 ErlangenGermany

Coherent Raman scattering microscopy is a fast,label-free,and chemically specific imaging technique that shows high potential for future in vivo optical ***,the imaging depth in tissues is limited to the sub-millimeter range because of absorption and *** of coherent Raman imaging using a fiber endoscope system is a crucial step towards imaging deep inside living tissues and providing information that is inaccessible with current microscopy *** now,the development of coherent Raman endoscopy has been hampered by several issues,mainly related to the fiber delivery of the excitation pulses and signal ***,we present a flexible,compact,coherent Raman,and multimodal nonlinear endoscope(4.2mm outer diameter,71mm rigid length)based on a resonantly scanned hollow-core Kagomé-lattice double-clad *** fiber design enables distortion-less,background-free delivery of femtosecond excitation pulses and back-collection of nonlinear signals through the same ***-micrometer spatial resolution over a large field of view is obtained by combination of a miniature objective lens with a silica microsphere lens inserted into the fiber *** demonstrate high-resolution,high-contrast coherent anti-Stokes Raman scattering,and second harmonic generation endoscopic imaging of biological tissues over a field of view of 320μm at a rate of 0.8 frames per *** results pave the way for intraoperative label-free imaging applied to real-time histopathology diagnosis and surgery guidance.

关键词： fiber scattering millimeter

Emulation of Realistic Multi-Path Propagation Channels inside an Anechoic Chamber for Antenna Diversity Measurements

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Wireless Engineering and Technology 2020年第1期11卷 1-12页

作者： Alaa Choumane Ahmad El Sayed Ahmad Khaled Khoder xlim O.S.A. Department—UMR CNRS 6172 University of Limoges Limoges France Faculty of Public Health Lebanese University Zahle Lebanon Faculty of Sciences Lebanese University Tripoli Lebanon Azm Institute Department of Innovation and Technology Tripoli Lebanon

As antennas are inherently included recommended in Over-The-Air (OTA) testing, it is important to also consider realistic channel models for the multiple-input multiple-output (MIMO) device performance evaluation. This paper aims to emulate realistic multi-Path propagation channels in terms of angles of arrivals (AoA) and cross-polarization ratio (XPR) with Rayleigh fading, inside an anechoic chamber, for antenna diversity measurements. In this purpose, a practical multi-probe anechoic chamber measurement system (MPAC) with 24 probe antennas (SATIMO SG24) has been used. However, the actual configuration of this system is not able to reproduce realistic channels. Therefore, a new method based on the control of the SG24 probes has been developed. At first time, this method has been validated numerically through the comparison of simulated and analytical AoA probability density distributions. At the second time, the performance of an antenna diversity system inside the SG24 has been performed in terms of the correlation coefficient and diversity gain (DG) using an antenna reference system. Simulated and measurements results have shown a good agreement.

关键词： Channel Emulation Multi-Path OTA Measurements Antenna Diversity Measurements MIMO Correlation Coefficient Diversity Gain

Femtosecond nonlinear losses in multimode optical fibers

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Photonics Research 2021年第12期9卷 2443-2453页

作者： MARIO FERRARO FABIO MANGINI MARIO ZITELLI ALESSANDRO TONELLO ANTONIO DE LUCA VINCENT COUDERC STEFAN WABNITZ Department of Information Engineering Electronicsand TelecommunicationsSapienza University of RomeVia Eudossiana 1800184 RomeItaly Department of Information Engineering University of BresciaVia Branze 3825123 BresciaItaly Universitéde Limoges XLIMUMR CNRS 7252123 Avenue A.Thomas87060 LimogesFrance Physics Department University of CalabriaI-87036 Arcavacata di RendeCSItaly CNR Nanotec-Institute of Nanotechnology S.S.CosenzaI-87036 RendeCSItaly CNR-INO Istituto Nazionale di OtticaVia Campi Flegrei 34I-80078 PozzuoliNAItaly

Multimode optical fibers are attracting a growing interest for their capability to transport high-power laser beams,coupled with novel nonlinear optics-based ***,optical fiber breakdown occurs when beam intensities exceed a certain critical *** breakdown associated with irreversible modifications of the refractive index,triggered by multiphoton absorption,has been largely exploited for fiber material *** we show that,for light beam intensities slightly below the breakdown threshold,nonlinear absorption strongly affects the dynamics of a propagating beam as *** experimentally analyze this subthreshold regime and highlight the key role played by spatial self-imaging in graded-index fibers for enhancing nonlinear optical *** characterize the nonlinear power transmission properties of multimode fibers for femtosecond pulses propagating in the near-infrared spectral *** show that an effective N-photon absorption analytical model is able to describe the experimental data well.

关键词： breakdown Femto fibers

Thermoelectric Properties of ZnO-P₂O₅/(Ni) Composites

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New Journal of Glass and Ceramics 2016年第3期6卷 19-27页

作者： Omar Oabi Abdelkarim Maaroufi Bruno Lucas Aumeur El Amrani Laboratory of Composite Materials Polymers and Environment Department of Chemistry Faculty of Sciences University Mohammed V Rabat-Agdal Morocco xlim UMR 6172-Université de Limoges/CNRS Limoges Cedex France LPSMS FST Errachidia University Moulay Ismail Meknès Errachidia Morocco

The overall purpose of the present study is basically to understand the manifestation of the thermo-electrical properties of the matrix ZnO-P2O5 first, and of the ZnO-P2O5 composites loaded with different volume fractions of nickel (Ni) as conductive fillers. In the matrix ZnO-P2O5, the values of electrical conductivity varied between 1.14 × 10-8 and 7.8 × 10-7 (S/cm), and the Seebeck coefficient value varied between minimal value 265 and maximal value 670 (μV/K) in the studied temperature. In composite ZnO-P2O5/Ni, it was shown that the Seebeck coefficient changed from high positive to negative values when the filler amount was increased, indicating a non-conducting to conducting phase transition. Such behavior exhibits that this transition is accompanied by the passing of carrier charge from p to n type. The study of thermoelectrically transport for high volume fraction of filler enabled the achievement, for the first time on this kind of composites, of an original transition called PTC transition. Thus, highest values of power factor (PF = S2 ≈ 2 × 10-3 W·m-1·K-2 at 407 K) were obtained, giving a possibility of industrial applications.

关键词： Zinc Phosphate Glasses Composites Seebeck Coefficient Power Factor

Sensing and lasing applications of whispering gallery mode microresonators

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Opto-Electronic Advances 2018年第9期1卷 1-10页

作者： Yu Zheng Zhifang Wu Perry Ping Shum Zhilin Xu Gerd Keiser Georges Humbert Hailiang Zhang Shuwen Zeng Xuan Quyen Dinh COFT School of EEE Nanyang Technological University Singapore 639798 Singapore CINTRA CNRS/NTU/Thales Research AllianceSingapore 637553 Singapore Fujian Key Laboratory of Light Propagation and Transformation College of Information Science and EngineeringHuaqiao University Xiamen 361021 China Center for Gravitational Experiments School of Physics Huazhong University of Science and Technology Wuhan 430074 China Department of Electrical and Computer Engineering Boston University Boston 02215 USA xlim Research Institute UMR 7252 CNRS/University of Limoges Limoges 87060 France R&T Thales Solutions Asia Pte Ltd Singapore 498755Singapore

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关键词： WGM microresonators sensors microlasers microcavities

Low-Loss Dielectric Material Characterization and High-Q Resonator Design from Microwave to Millimetre Waves Frequencies

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Journal of Physical Science and Application 2011年第1期1卷 15-28页

作者： Jean-Michel Le Floch Michael E. Tobar Georges Humbert David Mouneyrac Denis Ferachou Romain Bara Michel Aubourg John G. Hartnett Dominique Cros Jean-Marc Blondy Jerzy Krupka School of Physics University of Western Australia 35 Stirling Hwy 6009 Crawley Western Australia xlim UMR CNRS No 6172 123 av. A. Thomas 87060 Limoges Cedex France Institute of Microelectronics and Optoelectronics Warsaw University of Technology Kosykowa 75 Warsaw Poland

Dielectric resonators are key components in many microwave and millimetre wave circuits and applications, including high-Q filters and frequency-determining elements for precision frequency synthesis. Multilayered and bulk low-loss single crystal and polycrystalline dielectric structures have become very important for designing these devices. Proper design requires careful electromagnetic characterisation of low-loss material properties. This includes exact simulation with precision numerical software and precise measurements of resonant modes. For example, we have developed the Whispering Gallery mode technique, which has now become the standard for characterizing low-loss structures. This paper will review some of the common characterisation techniques used in the microwave to millimetre wave frequency regime.

关键词：《物理科学与应用:英文版》期刊编辑部编辑工作