Research and Design of a Routing Protocol in Large-Scale Wireless Sensor Networks

无线传感器网络，作为全球未来十大技术之一，集成了传感器技术、嵌入式计算技术、分布式信息处理和自组织网技术，可实时感知、采集、处理、传输网络分布区域内的各种信息数据，在军事国防、生物医疗、环境监测、抢险救灾、防恐反恐、危险区域远程控制等领域具有十分广阔的应用前景。 本文研究分析了无线传感器网络的已有路由协议，并针对大规模的无线传感器网络设计了一种树状路由协议，它根据节点地址信息来形成路由，从而简化了复杂繁冗的路由表查找和维护，节省了不必要的开销，提高了路由效率，实现了快速有效的数据传输。 为支持此路由协议本文提出了一种自适应动态地址分配算——ADAR（AdaptiveDynamicAddre...As one of the ten high technologies in the future, wireless sensor network, which is the integration of micro-sensors, embedded computing, modern network and Ad Hoc technologies, can apperceive, collect, process and transmit various information data within the region. It can be used in military defense, biomedical, environmental monitoring, disaster relief, counter-terrorism, remote control of haz...学位：工学硕士院系专业：信息科学与技术学院通信工程系_通信与信息系统学号：2332007115216

Le syndrome de Bardet-Biedl (Etude des atteintes rénales et du profil cardio-vaculaire et recherche de corrélations génotype-phénotype dans une cohorte nationale.)

STRASBOURG-Medecine (674822101) / SudocPARIS-BIUM (751062103) / SudocSudocFranceF

Phase mixture in MOCVD and reactive sputtering TiOxNy thin films revealed and quantified by XPS factorial analysis.

Titanium oxynitride thin films have been deposited by low-pressure metalorganic chemical vapour deposition and reactive sputtering. The growth temperature for chemical vapour-deposited films and water vapour partial pressure for sputter-deposited films have been used to modulate the chemical composition. Both series have been analysed using X-ray photoelectron spectroscopy (XPS) in order to describe the structure of the materials using a factorial analysis approach. Titanium and metalloid concentrations have also been determined and compared to an elemental analysis performed using Rutherford backscattering spectroscopy and nuclear reaction analysis. The two deposition methods led to the synthesis of TiOxNy coatings exhibiting various oxygen and nitrogen concentrations from metallic TiN to insulating TiO2 compounds. Taking into account the Ti 2p signals of XPS spectra and implementing the factorial analysis, both series exhibited the coexistence of two phases, namely Ti(N,O) and TiO2. Quantification of each phase has been calculated and discussed as a function of the deposition conditions

Phase mixture in MOCVD and reactive sputtering TiOxNy thin films revealed and quantified by XPS spectra factorial analysis

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Flash annealing influence on structural and electrical properties of TiO2/TiO/Ti periodic multilayers

International audienceMultilayered structures with a 40 nm period composed of titanium and two different titanium oxides, TiO and TiO2, were accurately produced by DC magnetron sputtering using the reactive gas pulsing process. These multilayers were sputtered onto Al2O3 sapphire to avoid substrate compound diffusion during flash annealing (ranging from350 °C to 550 °C). Structure and composition of these periodic TiO2/TiO/Ti stackswere investigated by X-ray diffraction, X-ray photoemission spectroscopy and transmission electronic microscopy techniques. Two crystalline phases α-Ti and fcc-TiO were identified in the metallic-rich sub-layers whereas the oxygen-rich ones were composed of amixture of amorphous and rutile TiO2 phase. DC electrical resistivity ρ measured for temperatures ranging from 25 to 200 °C was influenced by the thermal treatments. The temperature coefficients of resistance of these periodic TiO2/TiO/Ti multilayers were modified from 11.7 × 10−04 to −8.81 × 10−04 K−1. Local changes of crystallinity were reported and the resistivity responses of these annealed films could be linked to the typical electrical behavior of a metal-oxide mixtur

Tribochemical study of Ni62Nb33Zr5 metallic glass depending on the Cr content of steel counterparts

International audienceTribochemical study of Ni62Nb33Zr5 metallic glass depending on the Cr content of steel counterpart

Tribochemical study of Ni62Nb33Zr5 metallic glass depending on the Cr content of steel counterparts

International audienceTribochemical study of Ni62Nb33Zr5 metallic glass depending on the Cr content of steel counterpart

Atomic Layer Deposition of Au-TiO2 inverse opals for the visible light photocatalysis of dyesdegradation

International audienceThe pollution of waste water due to organic dyes used in the textile and chemical industries is an important environmental issue. Inverse opals (IO) offer a great potential for increasing the efficiency of their degradation by semiconductor photocatalysts such as TiO2 by the synergy of high specific surface and photonic crystal properties [1]. Doping TiO2 with gold nanoparticles is another possible strategy to enhance its photocatalytic activity by increasing its optical absorption in the visible range [2].This work reports the synthesis of Au-TiO 2 IO films by Atomic Layer Deposition and the study of their visible-light photocatalytic activity for the degradation of methylene blue in water solution compared to pure TiO2 IO and flat Au-TiO2 films. The use of preformed nanoparticles with a narrow size distribution allows to better control their plasmonic properties including light absorption in the visible range. The morphology of Au-TiO 2 IO films and the distribution of Au nanoparticles have been analyzed by scanning electron microscopy (Fig. 1) and nano-SIMS. Their composition and structure have been investigated by XPS and Raman spectroscopy.The degradation kinetics of methylene blue was studied using Au-TiO2 IO films as visible light photocatalysts. Flat Au-TiO2 films were also used for comparison.It has been shown that doping of TiO 2 with gold nanoparticles allows to obtain a faster degradation which reaches about 95 % in 7 hours instead of 90 % after 14 hours with flat films. These results highlight the potential of Au-TiO2 inverse opal films synthesized by ALD for visible lightphotocatalytic applications.[1] L. Hu et al., Catalysis Communications 40 (2013) 106 – 110.[2] S. W. Verbruggen, J. Photochem. and Photobiology C: Photochem. Reviews 24 (2015) 64 - 82

Atomic Layer Deposition of Au-TiO2 inverse opals for the visible light photocatalysis of dyesdegradation

International audienceThe pollution of waste water due to organic dyes used in the textile and chemical industries is an important environmental issue. Inverse opals (IO) offer a great potential for increasing the efficiency of their degradation by semiconductor photocatalysts such as TiO2 by the synergy of high specific surface and photonic crystal properties [1]. Doping TiO2 with gold nanoparticles is another possible strategy to enhance its photocatalytic activity by increasing its optical absorption in the visible range [2].This work reports the synthesis of Au-TiO 2 IO films by Atomic Layer Deposition and the study of their visible-light photocatalytic activity for the degradation of methylene blue in water solution compared to pure TiO2 IO and flat Au-TiO2 films. The use of preformed nanoparticles with a narrow size distribution allows to better control their plasmonic properties including light absorption in the visible range. The morphology of Au-TiO 2 IO films and the distribution of Au nanoparticles have been analyzed by scanning electron microscopy (Fig. 1) and nano-SIMS. Their composition and structure have been investigated by XPS and Raman spectroscopy.The degradation kinetics of methylene blue was studied using Au-TiO2 IO films as visible light photocatalysts. Flat Au-TiO2 films were also used for comparison.It has been shown that doping of TiO 2 with gold nanoparticles allows to obtain a faster degradation which reaches about 95 % in 7 hours instead of 90 % after 14 hours with flat films. These results highlight the potential of Au-TiO2 inverse opal films synthesized by ALD for visible lightphotocatalytic applications.[1] L. Hu et al., Catalysis Communications 40 (2013) 106 – 110.[2] S. W. Verbruggen, J. Photochem. and Photobiology C: Photochem. Reviews 24 (2015) 64 - 82