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检索条件"任意字段=3rd International Conference on Wireless Algorithms, Systems and Applications"

共 12570 条记录，以下是4921-4930 订阅

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Performance Evaluation of Link Quality Extension in Multihop wireless Mobile Ad-hoc Networks

Performance Evaluation of Link Quality Extension in Multihop...

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3rd international conference on Complex, Intelligent and Software Intensive systems

作者： Ikeda, Makoto Barolli, Leonard Hiyama, Masahiro De Marco, Giuseppe Yang, Tao Durresi, Arjan Fukuoka Inst Technol Grad Sch Engn Higashi Ku 3-30-1 Wajiro Higashi Fukuoka 8110295 Japan FIT Dept Informat & Commun Engn Higashi Ku Fukuoka 8110295 Japan Toyota Technol Inst Dept Engn Tenpaku Ku Nagoya Aichi 4688511 Japan Indiana Univ Purdue Univ Dept Comp & Informat Sci Indianapolis IN 46202 USA

ISBN: (纸本)9781424435692

Recently, Mobile Ad-hoc Networks (MANET) are continuing to attract the attention for their potential use in several fields. Most of the work has been done in simulation, because a simulator can give a quick and inexpensive understanding of protocols and algorithms. However, experimentation in the real world are very important to verify the simulation results and to revise the models implemented in the simulator In this paper we present the implementation and analysis of our testbed considering the Link Quality Window Size (LQWS) parameter for Optimized Link State Routing (OLSR) protocol. We investigate the effect of mobility, in the throughput of a MANET The mobile nodes move toward the destination at a regular speed. When the mobile nodes arrive at the corner they stop for about three seconds. In our experiments, we consider two cases: only one node is moving (mobile node) and two nodes (intermediate nodes) are moving at the same time. We assess the Performance of our testbed in terms of throughput, round trip time, jitter and packet loss. From our experiments, we found that throughput of TCP was improved by reducing LQWS.

关键词： Throughput

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A New Method of Predicting Continental Fog Attenuations for Terrestrial Optical wireless Link

A New Method of Predicting Continental Fog Attenuations for ...

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3rd international conference on Next Generation Mobile applications, Services, and Technologies

作者： Awan, M. S. Leitgeb, E. Nadeem, F. Khan, M. S. Capsoni, C. Graz Univ Technol Inst Broadband Commun A-8010 Graz Austria Politecn Milan Dipartimento Elettr & Informat Milan Italy

ISBN: (纸本)9780769537863

Free Space Optics (FSO) is getting increased popularity during last few years due to its increased power efficiency for reasonably longer distances. Moreover, it provides data rates that can cater for our future broadband telecommunication requirements besides resolving the last mile access bottleneck. But FSO links are subjected to various kinds of signal deteriorations and attenuations due to different weather conditions- clouds, sleet, rain, snow and especially fog that can lead signal attenuations up to few hundreds of dB/km. In this paper, we present comparison and analysis of measured optical signal attenuation for continental fog case and propose a new method of predicting continental fog attenuations from measured temperature and relative humidity values.

关键词： Drop size distribution (DSD) free space optics (FSO) specific attenuation visibility range

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A Cluster-Tree based Topology Control for wireless Sensor Network 3

A Cluster-Tree based Topology Control for Wireless Sensor Ne...

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3rd international conference on Electrical, Electronics, Communication, Computer Technologies and Optimization Techniques, ICEECCOT 2018

作者： Kelagadi, Hemantaraj M. Kumar, Priyatam School of Electronics and Communication KLE Technological University Hubballi India

ISBN: (纸本)9781538651308

wireless Sensor Network (WSN) is found to be one of the attractive research fields. The energy resource of each node in the WSN being limited, minimization of energy consumption is an important aspect. Therefore design of an energy efficient algorithm is of a major concern to enhance the network lifetime and performance. Here we present a clustering-Tree protocol which takes an advantage in terms of clustering and tree management. This approach helps in controlling the topology of the network where the nodes are grouped together to form clusters and maintain a geographically close relation between the intermediate clusters. A node weighing higher based on its available energy level and its distance to the member nodes is selected as cluster head (CH). In the usual case of clustering the energy consumption of CH is more as it involves in several tasks like data collection from other in-cluster nodes, data aggregation and data transfer to base station or other clusters which may lead to sooner energy depletion and may require frequent change in the CHs. Here we introduce the concept of assistant cluster head (ACH) which acts as a support to the CH in carrying out several tasks of the CH thus maintaining the cluster with same CH for a considerable amount of time. The simulated results show that the algorithm provides better QoS with respect to delay and network lifetime as compared to LEACH and CTEF algorithms. © 2018 IEEE.

关键词： Energy utilization

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3rd Canadian Workshop on Information Theory and applications, 1993

3rd Canadian Workshop on Information Theory and Applications...

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3rd Canadian Workshop on Information Theory and applications, 1993

ISBN: (纸本)9783540579366

The proceedings contain 26 papers. The special focus in this conference is on Information Theory and applications. The topics include: Constructive problems for irreducible polynomials over finite fields;singular algebraic curves over finite fields;a divisionless form of the schur berlekamp-Massey algorithm;error-control coding, modulation and equalization for all-digital advanced television;a finite field arithmetic unit VLSI chip;a successful attack against the DES;low-complexity and high-performance multilevel coded modulation for the AWGN and Rayleigh fading channels;channel coding for a frequency-hopped wireless transceiver;a unified view of noncoherent detection and differential detection of phase modulated signals;error reduction of coded DPSK over a fading channel;performance of BCH codes with DES encryption in a digital mobile channel;reduced-complexity channel estimation and equalization for TDMA mobile radio systems;sequential decoding on intersymbol interference channels under the Pe-criterion;separable concatenated codes with iterative map filtering;adapting the strongly-connected trellis concept for use with trellis-coded modulation;adapting the strongly-connected trellis concept for use with trellis-coded modulation;trellis-based decoding of binary linear block codes;permutation decoding using primitive elements as multipliers;overflow constraint in hybrid nodes with movable boundary scheme;statistical analysis of wavelet transform coded multi-channel signals for transmission over ATM packet networks;throughput increase of ALOHA-based systems with multiuser sequence detection;auto-regressive transfer function identification using chaos;a new algorithm for signal classification using phase information and efficient algorithms for fixed-rate entropy-coded vector quantization.

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Simulation and analysis of PMSM based on space vector control strategy

Simulation and analysis of PMSM based on space vector contro...

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3rd international conference on Materials Science and Information Technology, MSIT 2013

作者： Zhao, Gang Zhang, Nan Tianjin University of Technology Tianjin Key Laboratory for Control Theory and Applications in Complicated Systems 300384 China

ISBN: (纸本)9783037857700

Permanent magnet synchronous motor (PMSM) vector control strategy is studied deeply in the paper based on the analysis of the operation principle of permanent magnet synchronous motor (PMSM). Permanent magnet synchronous motor (PMSM) speed-current double closed loop control system was built by Matlab/Simulink. The simulation results showed that the system had fast response speed, high accuracy and strong anti-interference ability and so on. It also proved that Permanent magnet synchronous motor (PMSM) vector control system had good dynamic and static performances. © (2013) Trans Tech Publications, Switzerland.

关键词： Simulink

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A measurement-based algorithm to maximize the utility of wireless networks 11

A measurement-based algorithm to maximize the utility of wir...

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17th Annual international conference on Mobile Computing and Networking, MobiCom'11 and Co-Located Workshops - 3rd ACM Workshop on wireless of the Students, by the Students, for the Students Workshop, S3'11

作者： Herzen, Julien Aziz, Adel Merz, Ruben Shneer, Seva Thiran, Patrick School of Computer and Communication Sciences EPFL Lausane Switzerland Deutsche Telekom Laboratories Berlin Germany Heriot-Watt University Edinburgh United Kingdom

ISBN: (纸本)9781450308687

The goal of jointly providing fairness and efficiency in wireless networks can be seen as the problem of maximizing a given utility function. The main difficulty when solving this problem is that the capacity region of wireless networks is typically unknown and time-varying, which prevents the usage of traditional optimization tools. As a result, scheduling and congestion control algorithms are either too conservative because they under-estimate the capacity region, or suffer from congestion collapse because they over-estimate it. We propose a new adaptive congestion control algorithm, called Enhance & Explore (E&E). It maximizes the utility of the network without requiring any explicit characterization of the capacity region. E&E works above the MAC layer and is decoupled from the underlying scheduling mechanism. It provably converges to a state of optimal utility. We evaluate the performance of the algorithm in a WLAN setting, using both simulations and measurements on a real testbed composed of IEEE 802.11 wireless routers. © 2011 ACM.

关键词： Testbeds

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A lifetime supporting framework for cloud applications

A lifetime supporting framework for cloud applications

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3rd IEEE international conference on Cloud Computing, CLOUD 2010

作者： Hosono, Shigeru Huang, He Hara, Tatsunori Shimomura, Yoshiki Arai, Tamio Service Platforms Research Laboratories NEC Corporation Japan Co. Ltd. China Department of Precision Engineering University of Tokyo Japan Department of System Design Tokyo Metropolitan University Japan

ISBN: (纸本)9780769541303

This paper proposes a framework, which integrates the development and operation environments for cloud applications. Adopting perspectives on lifecycle management, the framework is equipped with tools and platforms, which seamlessly integrate lifetime phases: requirement analysis, architecture design, application implementation, operation and improvement. These are predicated on theories in design engineering, enabling identification of constraints arising in the development process and of dependencies among functional modules. A case study shows the feasibilities of the design principles, and indicates possibilities for the framework to be an Application Platform as a Service (APaaS), which can form an eco-system of datacenter operators, systems integrators and application providers. © 2010 IEEE.

关键词： Platform as a Service (PaaS)

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Weighted Data Loss Minimization in UAV Enabled wireless Sensor Networks 17th

Weighted Data Loss Minimization in UAV Enabled Wireless Sens...

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17th international conference on wireless algorithms, systems, and applications (WASA)

作者： Xiang, Zhengzhong Liu, Tang Peng, Jian Sichuan Univ Coll Comp Sci Chengdu Peoples R China Sichuan Normal Univ Coll Comp Sci Chengdu Peoples R China

ISBN: (纸本)9783031192135;9783031192142

With high mobility and adaptability, the Unmanned Aerial Vehicle (UAV) has provided a promising solution for data collection in wireless Sensor Networks (WSNs). However, few existing works considered that data overwritten would occur if the UAV can not collect data from sensors in time, which will cause data loss in WSNs. Moreover, the importance of data stored in different sensors may vary significantly according to the application scenario. In this paper, we formulate a novel Loss Minimization Problem (LMP) in a UAV-enabled WSN. The objective is to minimize the volume of weighted data loss in the WSN by jointly considering the UAV hovering locations and hovering durations, subject to the limited energy capacity. We first devise a novel one-to-many data collection scheme that enables the UAV to collect data from multiple sensors simultaneously. Then we discrete the infinite hovering locations of the UAV into finite to reduce computational complexity. We instead propose efficient heuristic and approximation algorithms for the optimization problem. Finally, we evaluate the performance of the proposed algorithms through extensive experimental simulations. Simulation results demonstrated that the proposed algorithms are promising.

关键词： Unmanned aerial vehicle wireless sensor network Data collection Data loss minimization Trajectory optimization

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2014 international conference on Connected Vehicles and Expo, ICCVE 2014 - Proceedings

2014 International Conference on Connected Vehicles and Expo...

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3rd international conference on Connected Vehicles and Expo, ICCVE 2014

ISBN: (纸本)9781479967292

The proceedings contain 212 papers. The topics discussed include: price incentivized electric vehicle charge control for community voltage regulation;enabling location based services for hyperlocal marketing in connected vehicles;coordinated, progressive vehicular headlight glare reduction for driver safety using wireless sensor networks;development of risk factor management method for federation of clouds;hybrid decision and data adaptive antenna array processing for collision avoidance radar;modeling conducted noise propagation along high-voltage DC power buses for electric vehicle applications;assessment of electric vehicle charging load and its impact on electricity market price;electrical drivetrains for recumbent tricycles;and recommendations for mitigating low frequency magnetic field exposure in hybrid/electric vehicles.

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Embedded System of Signal Processing on FPGA: Implementation OpenMP Architecture 2nd

Embedded System of Signal Processing on FPGA: Implementation...

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3rd international conference on Digital Technologies and applications

作者： Hadji, Mhamed Elhanaoui, Abdelkader Skouri, Rachid Agounad, Said Fac Sci & Technol REPTI Lab BP 509 Boutalamine Errachida Morocco Moulay Ismail Univ Meknes Meknes Morocco Moulay Ismail Univ Meknes High Sch Technol Km 5Rd AgourayN6 Meknes 50040 Morocco Ibn Zohr Univ Fac Sci Lab Metrol & Traitement Informat Agadir 80000 Morocco

ISBN: (纸本)9783031298561;9783031298578

The purpose of this paper is to study the phenomenon of acoustic scattering by using a new method. The signal processing (FFT iFFT BESSEL functions) is widely applied to obtain information with high precision accuracy. Signal processing has a wider implementation in general-purpose processors Our interest was focused on the use of FPGAs (Field-Programmable Gate Arrays) in order to minimize the computational complexity in single processor architecture then be accelerated on FPGA and meet real time and energy efficiency ***-purpose processors are not efficient for signal processing. We implemented the acoustic backscattered signal processing model on the DE1SOC FPGA and compared it to Odroid xu4. By comparison, the computing latency of Odroid xu4 and FPGA are 60 s, and 20 s respectively. The detailed SoC FPGA-based system has shown that acoustic spectra are performed at up to 3 times faster than the Odroid xu4 implementation. FPGA-based system of processing algorithms is realized with an absolute error about 10(-2). This study underlines the increasing importance of embedded systems in underwater acoustics, especially in non-destructive testing. It is possible to obtain information related to the detection and characterization of submerged cells. So we have achieved good experimental results in real time and energy efficiency.

关键词： DE1 FPGA acoustic scattering Form function signal processing Non-destructive testing

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