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2009 3rd International Conference on Signals, Circuits and Systems (SCS)最新文献

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Development of a remote lab for electrical engineering program 电子工程项目远程实验室的开发
2009 3rd International Conference on Signals, Circuits and Systems (SCS) Pub Date : 2009-11-01 DOI: 10.1109/ICELIE.2009.5413214
Asma Khalil, M. Hasna, M. Benammar, M. Chaabane, C. Amar
{"title":"Development of a remote lab for electrical engineering program","authors":"Asma Khalil, M. Hasna, M. Benammar, M. Chaabane, C. Amar","doi":"10.1109/ICELIE.2009.5413214","DOIUrl":"https://doi.org/10.1109/ICELIE.2009.5413214","url":null,"abstract":"A remote lab for electrical engineering experiments has been designed and implemented. This has been intended as a platform that supports existing traditional labs by offering lab experiments that serve some of the student learning outcomes of the program. This offers fully interactive environment to the remote user. A dedicated architecture that meets network security and equipment safety requirements has been implemented. The remote control of the experiment is ensured through the powerful and flexible shared variables engine of Lab VIEW. The remote lab has been successfully tested with two sample experiments. The infrastructure may accommodate many more concurrently-running experiments. Full details of the proposed platform are given.","PeriodicalId":126072,"journal":{"name":"2009 3rd International Conference on Signals, Circuits and Systems (SCS)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126429652","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
Shape improvement for piezoelectric energy harvesting applications 压电能量收集应用的形状改进
2009 3rd International Conference on Signals, Circuits and Systems (SCS) Pub Date : 2009-11-01 DOI: 10.1109/ICSCS.2009.5412553
S. B. Ayed, F. Najar, A. Abdelkefi
{"title":"Shape improvement for piezoelectric energy harvesting applications","authors":"S. B. Ayed, F. Najar, A. Abdelkefi","doi":"10.1109/ICSCS.2009.5412553","DOIUrl":"https://doi.org/10.1109/ICSCS.2009.5412553","url":null,"abstract":"We aim at using variable shape cantilever beam to improve the efficiency of energy harvesting from ambient vibration in wireless grid sensor applications. The cantilever beam is composed of an active layer composed of a piezoelectric material and a metallic layer (unimorph design). A tip mass attached to the free end of the cantilever beam is added to increase the inertial forces of the structure. The introduction of the variable shape design is motivated by the fact that prismatic shape beams are not efficient since only the part near to the clamped side can produce electrical power thanks to the presence of stresses. By varying the geometry of the beam we redistribute the stress along the beam's length in order to increase the harvested power. In this work, the equations of motion and associated boundary conditions are derived using Hamilton Principle. We analyze the statics and dynamics of the variable geometry beam. In order to maximize the harvested energy, we discuss the influence of the system's and excitation's parameters on the dynamic problem. Besides, we found that harvested energy is maximized for an optimum electric load resistance. Concerning the beam's shape, this work reveals that it should be as truncated as possible. In fact, trapezoidal cantilever with base and height dimensions equal to the base and length dimensions of a rectangular beam will have a higher strain and maximum deflection for a given load.","PeriodicalId":126072,"journal":{"name":"2009 3rd International Conference on Signals, Circuits and Systems (SCS)","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126244006","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
Detection of brain tumor in medical images 医学图像中脑肿瘤的检测
2009 3rd International Conference on Signals, Circuits and Systems (SCS) Pub Date : 2009-11-01 DOI: 10.1109/ICSCS.2009.5412577
A. Kharrat, Nacéra Benamrane, M. Ben Messaoud, M. Abid
{"title":"Detection of brain tumor in medical images","authors":"A. Kharrat, Nacéra Benamrane, M. Ben Messaoud, M. Abid","doi":"10.1109/ICSCS.2009.5412577","DOIUrl":"https://doi.org/10.1109/ICSCS.2009.5412577","url":null,"abstract":"This paper introduces an efficient detection of brain tumor from cerebral MRI images. The methodology consists of three steps: enhancement, segmentation and classification. To improve the quality of images and limit the risk of distinct regions fusion in the segmentation phase an enhancement process is applied. We adopt mathematical morphology to increase the contrast in MRI images. Then we apply Wavelet Transform in the segmentation process to decompose MRI images. At last, the k-means algorithm is implemented to extract the suspicious regions or tumors. Some of experimental results on brain images show the feasibility and the performance of the proposed approach.","PeriodicalId":126072,"journal":{"name":"2009 3rd International Conference on Signals, Circuits and Systems (SCS)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128149229","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: 158
A low power cross-coupled charge pump with charge recycling scheme 具有电荷回收方案的低功率交叉耦合电荷泵
2009 3rd International Conference on Signals, Circuits and Systems (SCS) Pub Date : 2009-11-01 DOI: 10.1109/ICSCS.2009.5412265
Hye-Won Hwang, J. Chun, K. Kwon
{"title":"A low power cross-coupled charge pump with charge recycling scheme","authors":"Hye-Won Hwang, J. Chun, K. Kwon","doi":"10.1109/ICSCS.2009.5412265","DOIUrl":"https://doi.org/10.1109/ICSCS.2009.5412265","url":null,"abstract":"A low power charge pump that recycles the wasted charges is described. CMOS switched Dickson charge pump cannot accommodate charge recycling since charges are leaking from the boosted supply (VPP) back to the external supply (VDD) during the recycling period. Given power constraints, the proposed 2-stage cross-coupled pump with leak-back current suppression can provide the current 5 times higher than that of the conventional cross-coupled pump at VPP of 5V. Its maximum achievable VPP is also 1.6 times higher. The test chip is under fabrication using 0.18um CMOS technology.","PeriodicalId":126072,"journal":{"name":"2009 3rd International Conference on Signals, Circuits and Systems (SCS)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128499459","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: 14
An improved psycho-acoustic model for MPEG 1 using a Morlet Cambridge wavelet 基于Morlet剑桥小波的mpeg1改进心理声学模型
2009 3rd International Conference on Signals, Circuits and Systems (SCS) Pub Date : 2009-11-01 DOI: 10.1109/ICSCS.2009.5412575
K. Abid, K. Ouni
{"title":"An improved psycho-acoustic model for MPEG 1 using a Morlet Cambridge wavelet","authors":"K. Abid, K. Ouni","doi":"10.1109/ICSCS.2009.5412575","DOIUrl":"https://doi.org/10.1109/ICSCS.2009.5412575","url":null,"abstract":"Many existing MP3 encoder employ an FFT-based transform to derive a spectral decomposition of the audio signal into uniform subbands with equal bandwidths. The nonuniform spectral resolution of the auditory system is taken into account. The initial audio signal processing within the psycho-acoustic model consists of a spectral decomposition to account for the frequency selectivity of the auditory system. However, the auditory system performs a nonuniform spectral decomposition of the acoustic signal in the cochlea. This paper presents a psycho-acoustic model based on an efficient nonuniform cochlear filter bank following the Cambridge model. Results of the proposed psycho-acoustic model applied to audio coding show better performance in terms of compression ratio and sound quality in comparison with the classical FFT model","PeriodicalId":126072,"journal":{"name":"2009 3rd International Conference on Signals, Circuits and Systems (SCS)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130576617","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: 2
Implementation of applications on a newly designed robot prototype: “Autonomous navigation and parallel parking” 在新设计的机器人原型上实现应用程序:“自主导航和平行停车”
2009 3rd International Conference on Signals, Circuits and Systems (SCS) Pub Date : 2009-11-01 DOI: 10.1109/ICSCS.2009.5412203
C. Abdelmoula, F. Chaari, M. Masmoudi
{"title":"Implementation of applications on a newly designed robot prototype: “Autonomous navigation and parallel parking”","authors":"C. Abdelmoula, F. Chaari, M. Masmoudi","doi":"10.1109/ICSCS.2009.5412203","DOIUrl":"https://doi.org/10.1109/ICSCS.2009.5412203","url":null,"abstract":"Autonomous navigation and parallel parking of robots is usually a challenging maneuver for conductors in industrial environments and in heavy traffic congestion respectively. Soft computing techniques are suited for robots like car control system when modeled by highly non linear differential equations and navigation in unknown and unstructured environments. To demonstrate their applicability in real-world applications, two easy control units are designed for performing tasks. In this paper, a novel vision of auto-navigation system and parallel parking is proposed and confirmed on the newly designed robot prototype for each model. The experimental results show the accuracy of measurement and recognition, and the robustness of dynamic auto-navigation in indoor environments. All these applications are implemented on the new prototype of the robot designed in the (EMC) research unity at the National Engineering School of Sfax.","PeriodicalId":126072,"journal":{"name":"2009 3rd International Conference on Signals, Circuits and Systems (SCS)","volume":"219 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131763580","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: 3
Outage analysis of general asynchronous OFDM amplify-and-forward cooperative networks 一般异步OFDM放大转发合作网络的中断分析
2009 3rd International Conference on Signals, Circuits and Systems (SCS) Pub Date : 2009-11-01 DOI: 10.1109/ICSCS.2009.5412687
Mehdi Torbatian, M. O. Damen
{"title":"Outage analysis of general asynchronous OFDM amplify-and-forward cooperative networks","authors":"Mehdi Torbatian, M. O. Damen","doi":"10.1109/ICSCS.2009.5412687","DOIUrl":"https://doi.org/10.1109/ICSCS.2009.5412687","url":null,"abstract":"The outage behavior of non-orthogonal amplify-and-forward (NAF) and orthogonal1 amplify-and-forward (OAF) relaying protocols over a general one hop asynchronous cooperative network is examined when orthogonal frequency division multiplexing (OFDM) is used to combat synchronization error among the relays. The relays are only allowed to preform linear transformations over the received signals. It is shown that the asynchronous OFDM OAF protocol provides the same DMT as that of the corresponding synchronous counterpart; however, the asynchronous OFDM NAF protocol provides better DMT than the one of traditional NAF for large length code words and throughout the range of the multiplexing gain. In particular, in a single relay network, the asynchronous OFDM NAF provides DMT as great as the one of a 2× 1 multiple input single output (MISO) channel.","PeriodicalId":126072,"journal":{"name":"2009 3rd International Conference on Signals, Circuits and Systems (SCS)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131935643","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: 3
Enhanced TRNG based on the coherent sampling 基于相干采样的增强TRNG
2009 3rd International Conference on Signals, Circuits and Systems (SCS) Pub Date : 2009-11-01 DOI: 10.1109/ICSCS.2009.5412601
Boyan Valtchanov, V. Fischer, A. Aubert
{"title":"Enhanced TRNG based on the coherent sampling","authors":"Boyan Valtchanov, V. Fischer, A. Aubert","doi":"10.1109/ICSCS.2009.5412601","DOIUrl":"https://doi.org/10.1109/ICSCS.2009.5412601","url":null,"abstract":"The paper presents several modifications of the True Random Number Generator proposed by Kohlbrenner and Gaj in 2004. The generator is based on a coherent sampling principle and it is aimed at cryptographic applications. It uses the timing jitter present in two clock signals with close frequencies as entropy source. The proposed enhancements are related to the setting of generator parameters (e. g. the frequency of the clock signals) and configuration (simple or mutual sampling) depending on size and composition of the clock jitters. Several versions of the generator have been implemented in two FPGA families, giving the output bit-rate up to 2 Mbits/s. Three generator configurations deliver a high-quality unbiased raw bit-stream, so that post-processing is not necessary and the generated raw random data pass both the FIPS 140-2 and NIST statistical tests. One of the proposed configurations can be fully automated and does not need manual intervention during placement and routing.","PeriodicalId":126072,"journal":{"name":"2009 3rd International Conference on Signals, Circuits and Systems (SCS)","volume":"18 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113932271","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: 22
Rapid design of specific MPSoC prototype within FPGA 在FPGA内快速设计特定的MPSoC原型
2009 3rd International Conference on Signals, Circuits and Systems (SCS) Pub Date : 2009-11-01 DOI: 10.1109/ICSCS.2009.5412331
Emna Kallel, Y. Aoudni, M. Abid
{"title":"Rapid design of specific MPSoC prototype within FPGA","authors":"Emna Kallel, Y. Aoudni, M. Abid","doi":"10.1109/ICSCS.2009.5412331","DOIUrl":"https://doi.org/10.1109/ICSCS.2009.5412331","url":null,"abstract":"This paper presents an idea of automatic generation of SoC architecture from a functional specification. Starting from an application task graph, C code will be generated automatically. Then the user can add the specific code of each task. Compilation rules are used in order to have a correct task graph and c code. Finally, an automatic generation of hardware and software SoC architecture will be down to get a new model prototype of the FPGA based SOC platform. We demonstrate the effectiveness of the proposed idea by the implementation of CAGT software tool which can generate efficient and correct C code from a task graph. The generated code is compliant to the ANSI C standard thus can be accepted by most compilers.","PeriodicalId":126072,"journal":{"name":"2009 3rd International Conference on Signals, Circuits and Systems (SCS)","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128610902","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: 0
Actuartor fault reconstruction for linear uncertain systems using sliding mode observer 基于滑模观测器的线性不确定系统执行器故障重构
2009 3rd International Conference on Signals, Circuits and Systems (SCS) Pub Date : 2009-11-01 DOI: 10.1109/ICSCS.2009.5412526
S. Dhahri, F. B. Hmida, A. Sellami, M. Gossa
{"title":"Actuartor fault reconstruction for linear uncertain systems using sliding mode observer","authors":"S. Dhahri, F. B. Hmida, A. Sellami, M. Gossa","doi":"10.1109/ICSCS.2009.5412526","DOIUrl":"https://doi.org/10.1109/ICSCS.2009.5412526","url":null,"abstract":"In this paper, we propose a new approach for the analysis and design of sliding-mode observer (SMO) under some matching conditions for a class of for a class of linear uncertain systems. We derive existence conditions sliding mode observers in terms of constrained Linear Matrix Inequalities (LMIs) guaranteeing a stable sliding motion on the switching surface. The gain matrices of the sliding-mode observer are characterized using the solution of the LMI existence condition. The generation of sliding modes permits the reconstruction of faults using the equivalent output injection which based on the available plant input/output information and can be calculated with on-line method. A scale crane example taken from the fault detection literature is used to demonstrate the method and its effectiveness.","PeriodicalId":126072,"journal":{"name":"2009 3rd International Conference on Signals, Circuits and Systems (SCS)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128778031","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
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