2011 International Conference on Broadband and Wireless Computing, Communication and Applications最新文献_第7页

Some Trials to Suppress Unnecessary Resonance in Photonic Crystal Cavity Structure 抑制光子晶体腔结构中不必要共振的一些试验

2011 International Conference on Broadband and Wireless Computing, Communication and Applications Pub Date : 2011-10-26 DOI: 10.1109/BWCCA.2011.77

Yongmei Zhang, Hiroyuki Terashima, Daichi Ogata, H. Maeda

{"title":"Some Trials to Suppress Unnecessary Resonance in Photonic Crystal Cavity Structure","authors":"Yongmei Zhang, Hiroyuki Terashima, Daichi Ogata, H. Maeda","doi":"10.1109/BWCCA.2011.77","DOIUrl":"https://doi.org/10.1109/BWCCA.2011.77","url":null,"abstract":"Propagation and filtering characteristics of two dimensional pillar-type photonic crystal waveguide with triangular lattice were measured and improved experimentally. Measurement was done by using a scale model in microwave frequency with lattice period P=26.5 mm, diameter of pillar .=7.5mm and its dielectric constant ƒÃr=36.0 around 4 GHz. First, symmetric Y-branch waveguide was set up by using line-defect in array of pillars. After confirming symmetric branching operation in frequency range between 3.6 and 4.2 GHz, a pair of pillars which have length of 3.0P and 2.5P respectively, were situated in each output waveguide as cavities. These cavities showed resonant characteristics at frequencies corresponding to ƒÉg/2 in the waveguide. Also, good extinction ratios of over 20 dB between output ports were observed at these resonant frequencies. Next, cascading the Y-branch by two stages and situating four cavities with different lengths at each output port, filtering characteristics were observed at each output in frequency range of 3.6 to 4.2 GHz. The extinction ratios at each resonance frequency were over 17 dB. Though the structure showed good filtering characteristics, unnecessary resonances in frequency domain were observed near main peaks of filtered frequency. To suppress these unwanted peaks, stabs with length of ƒÉg/4 were inserted after the cavities, where ƒÉg is wavelength of the unnecessary frequency. Due to the stabs, peaks of the unnecessary resonances were suppressed over 20 dB compared with simple cavities. This structure is applicable as a basic filter component in wavelength division multiplexing (WDM) systems in photonic crystal optical circuits.","PeriodicalId":391671,"journal":{"name":"2011 International Conference on Broadband and Wireless Computing, Communication and Applications","volume":"179 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123026241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 17

General Active Position Detectors Protect VANET Security 一般主动位置探测器保护VANET安全

2011 International Conference on Broadband and Wireless Computing, Communication and Applications Pub Date : 2011-10-26 DOI: 10.1109/BWCCA.2011.12

Gongjun Yan, B. B. Bista, D. Rawat, Earl F. Shaner

引用次数: 31

Multi-hop Wireless Networks Performance Evaluation via NS-3 Simulator 基于NS-3模拟器的多跳无线网络性能评估

2011 International Conference on Broadband and Wireless Computing, Communication and Applications Pub Date : 2011-10-26 DOI: 10.1109/BWCCA.2011.37

Makoto Ikeda, M. Hiyama, Elis Kulla, L. Barolli, M. Takizawa

引用次数: 5

Aircraft Actuator Fault Detector Based on Non Linear Inverse Dynamics 基于非线性逆动力学的飞机作动器故障检测

2011 International Conference on Broadband and Wireless Computing, Communication and Applications Pub Date : 2011-10-26 DOI: 10.1109/BWCCA.2011.72

Lunlong Zhong, A. Doncescu, F. Mora-Camino

{"title":"Aircraft Actuator Fault Detector Based on Non Linear Inverse Dynamics","authors":"Lunlong Zhong, A. Doncescu, F. Mora-Camino","doi":"10.1109/BWCCA.2011.72","DOIUrl":"https://doi.org/10.1109/BWCCA.2011.72","url":null,"abstract":"Control allocation compute the commands that are applied to the actuators so that a certain set of forces or moments are generated by the control effectors. In this communication we consider the problem of the design of an airborne system whose function is to solve the problem of allocation of transportation aircraft actuators during manoeuvres. The case of a roll manoeuvre, which may be quite demanding for the wings structure, is more particularly considered. The aim of this supervision function, similar to the load alleviation function, is to control the bending and flexion moments of the wings while performing a manoeuvre which can turn to be extreme. The wings actuators considered are the ailerons, the spoilers and the flaps, but the other aerodynamic actuators, elevators and rudders, must be considered to take into account the existing coupling effects between the three body axis. The proposed approach may be applied specially in the case in which some of the actuators are failed (stuck to a particular deflection or flapping in the wind stream) while theirs limitations, such as position, speed and response time, are considered explicitly in this study.","PeriodicalId":391671,"journal":{"name":"2011 International Conference on Broadband and Wireless Computing, Communication and Applications","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131523031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Performance of the MPI Based File Share System 基于MPI的文件共享系统性能研究

2011 International Conference on Broadband and Wireless Computing, Communication and Applications Pub Date : 2011-10-26 DOI: 10.1109/BWCCA.2011.91

Daisuke Tsukamoto, T. Nakashima

引用次数: 0

A MAC Protocol for Power Reduction in Wireless Sensor Networks Based on Load Estimation 一种基于负荷估计的无线传感器网络降功耗MAC协议

2011 International Conference on Broadband and Wireless Computing, Communication and Applications Pub Date : 2011-10-26 DOI: 10.1109/BWCCA.2011.19

A. Koyama, Ryoma Watanabe, L. Barolli

引用次数: 0

VANET Simulators: A Survey on Mobility and Routing Protocols VANET模拟器:移动性和路由协议调查

2011 International Conference on Broadband and Wireless Computing, Communication and Applications Pub Date : 2011-10-26 DOI: 10.1109/BWCCA.2011.11

Evjola Spaho, L. Barolli, Gjergji Mino, F. Xhafa, Vladi Koliçi

引用次数: 53

Indoor Location Fingerprinting Based on Data Reduction 基于数据约简的室内位置指纹识别

2011 International Conference on Broadband and Wireless Computing, Communication and Applications Pub Date : 2011-10-26 DOI: 10.1109/BWCCA.2011.52

D. Kukolj, M. Vuckovic, Szilveszter Pletl

{"title":"Indoor Location Fingerprinting Based on Data Reduction","authors":"D. Kukolj, M. Vuckovic, Szilveszter Pletl","doi":"10.1109/BWCCA.2011.52","DOIUrl":"https://doi.org/10.1109/BWCCA.2011.52","url":null,"abstract":"Agent localization in indoor wireless environments is a challenging issue. Numerous techniques have been developed. Location fingerprinting, which is based on received signal strength measurements, is a frequently used approach for indoor applications. In this paper, we examine the possibility to obtain the location fingerprinting method characterized with more accurate mapping between the signal-space and the physical-space. An implemented well-known weighted k-nearest neighbor (WkNN) method is enhanced by two steps: a) pre-processing by the unsupervised learning technique during radio map building and b) post-processing of initial estimates obtained by the WkNN localization method. In this post-processing step signal-space and physical-space are transformed and mapped using two techniques of the dimension reduction: principal component analysis and multidimensional scaling. The aim of this transformation step is to de-correlate and refine initially obtained location estimates. Parameters such as number of access points and number of nearest reference nodes are examined for their impact on accuracy of the presented localization techniques. Performances are examined and verified through the experiments with real environment data.","PeriodicalId":391671,"journal":{"name":"2011 International Conference on Broadband and Wireless Computing, Communication and Applications","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125986332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

A Survey on Home Telemedicine 家庭远程医疗调查

2011 International Conference on Broadband and Wireless Computing, Communication and Applications Pub Date : 2011-10-26 DOI: 10.1109/BWCCA.2011.59

K. F. Li, Wei Li

引用次数: 3

An Interactive Music Learning System in Ensemble Performance Class 合奏课互动音乐学习系统研究

2011 International Conference on Broadband and Wireless Computing, Communication and Applications Pub Date : 2011-10-26 DOI: 10.1109/BWCCA.2011.15

Kosuke Takano, S. Sasaki

引用次数: 6