D. Bhattacharyya, D. Chakraborty, S. Bandyopadhyay, Tai-hoon Kim
In this paper we propose an algorithm for exhaustive search of GIS Mobile query (point-in-area function). This algorithm search the status of a given coordinate point with respect to an area (described as a set of coordinates without any geometric relationship). In the exhaustive search algorithm proposed previously, there were a number of undetermined points (which does not support the range of scale), which are close to boundary co-ordinates. But in this paper a better approach is introduced by which much accurate result can be obtained.
{"title":"GIS and Mobile Query","authors":"D. Bhattacharyya, D. Chakraborty, S. Bandyopadhyay, Tai-hoon Kim","doi":"10.1109/ICCEE.2009.240","DOIUrl":"https://doi.org/10.1109/ICCEE.2009.240","url":null,"abstract":"In this paper we propose an algorithm for exhaustive search of GIS Mobile query (point-in-area function). This algorithm search the status of a given coordinate point with respect to an area (described as a set of coordinates without any geometric relationship). In the exhaustive search algorithm proposed previously, there were a number of undetermined points (which does not support the range of scale), which are close to boundary co-ordinates. But in this paper a better approach is introduced by which much accurate result can be obtained.","PeriodicalId":343870,"journal":{"name":"2009 Second International Conference on Computer and Electrical Engineering","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125120524","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}
A variable structure model reference adaptive control (VS-MRAC) strategy for automatic active steering of a two wheel steering car is proposed. An ideal steering system with fixed properties and moving on an ideal road is used as the reference model, and the automatic active steering system is forced to attain the same behavior as the reference model. The proposed system can treat the nonlinear relationships between the side slip angles and lateral forces on tire, and the uncertainties on friction of the road surface, whose compensation are very important under critical situations. Simulation results show improvements on side slip, yaw rate and Dy angle.
{"title":"Variable Structure Model Reference Adaptive Control, for Vehicle Automatic Steering System","authors":"A. K. Mohammadi, M. Saee","doi":"10.1109/ICCEE.2009.54","DOIUrl":"https://doi.org/10.1109/ICCEE.2009.54","url":null,"abstract":"A variable structure model reference adaptive control (VS-MRAC) strategy for automatic active steering of a two wheel steering car is proposed. An ideal steering system with fixed properties and moving on an ideal road is used as the reference model, and the automatic active steering system is forced to attain the same behavior as the reference model. The proposed system can treat the nonlinear relationships between the side slip angles and lateral forces on tire, and the uncertainties on friction of the road surface, whose compensation are very important under critical situations. Simulation results show improvements on side slip, yaw rate and Dy angle.","PeriodicalId":343870,"journal":{"name":"2009 Second International Conference on Computer and Electrical Engineering","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114254475","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}
A CMOS RF digitally programmable gain amplifier (RF PGA) is implemented as a part of a low-IF tuner IC using 0.25 and 0.5µm CMOS technology. This is achieved by applying a newly proposed differential circuit (the second derivatives of transconductance) cancellation technique, called the differential multiple gated transistor (DMGTR). In the DMGTR amplifier, linearity is improved by using transconductance linearization which can be achieved by canceling the negative peak value of the main transistor with the positive one in the auxiliary transistor having a different size and gate drive combined in parallel which is properly sized and biased. This enhancement, however, is limited by the distortion originated from the combined influence of and harmonic feedback, which can greatly be reduced by the cascoding MGTR output for the amplifier. By adopting the DMGTR, a low-power highly linear RF PGA is implemented. In this article, we propose a new differential circuit linearity improvement technique, called the differential multiple gated transistor (DMGTR), in order to obtain a low-power highly linear RF PGA. This technique does not lose other performance or consume extra power.
{"title":"Improvement of CMOS RF Gain Amplifier Using Differential Circuit Transconductance Linearization","authors":"E. Abiri, GholamReza Najibi, S. Najibi","doi":"10.1109/ICCEE.2009.156","DOIUrl":"https://doi.org/10.1109/ICCEE.2009.156","url":null,"abstract":"A CMOS RF digitally programmable gain amplifier (RF PGA) is implemented as a part of a low-IF tuner IC using 0.25 and 0.5µm CMOS technology. This is achieved by applying a newly proposed differential circuit (the second derivatives of transconductance) cancellation technique, called the differential multiple gated transistor (DMGTR). In the DMGTR amplifier, linearity is improved by using transconductance linearization which can be achieved by canceling the negative peak value of the main transistor with the positive one in the auxiliary transistor having a different size and gate drive combined in parallel which is properly sized and biased. This enhancement, however, is limited by the distortion originated from the combined influence of and harmonic feedback, which can greatly be reduced by the cascoding MGTR output for the amplifier. By adopting the DMGTR, a low-power highly linear RF PGA is implemented. In this article, we propose a new differential circuit linearity improvement technique, called the differential multiple gated transistor (DMGTR), in order to obtain a low-power highly linear RF PGA. This technique does not lose other performance or consume extra power.","PeriodicalId":343870,"journal":{"name":"2009 Second International Conference on Computer and Electrical Engineering","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131104273","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}
The autopilot design process is detailed from a backstepping control perspective. The control parameters were determined based on step and sine input commands. Then both characteristics and effect of two control parameters were examined. A linear three-loop topology was also presented for comparison. The results show that the backstepping recursive approach provides a systematically constructive procedure for acceleration autopilot. The based nonlinear autopilot exhibits excellent tracking and robustness.
{"title":"Missile Autopilot Design Using Backstepping Approach","authors":"D. Lin, Jun-fang Fan","doi":"10.1109/ICCEE.2009.51","DOIUrl":"https://doi.org/10.1109/ICCEE.2009.51","url":null,"abstract":"The autopilot design process is detailed from a backstepping control perspective. The control parameters were determined based on step and sine input commands. Then both characteristics and effect of two control parameters were examined. A linear three-loop topology was also presented for comparison. The results show that the backstepping recursive approach provides a systematically constructive procedure for acceleration autopilot. The based nonlinear autopilot exhibits excellent tracking and robustness.","PeriodicalId":343870,"journal":{"name":"2009 Second International Conference on Computer and Electrical Engineering","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131476013","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}
Ahmadreza Ghaffarizadeh, Kamelia Ahmadi, M. Eftekhari
Extinction-based Evolutionary Algorithms (EEA) have been recently developed as the solutions for the problem of early convergence in multimodal optimization tasks. The reproduction of EEAs is done only by mutation. Moreover, according to recent studies, several attempts have been made to prove rigorously that crossover is essential for typical optimization problems. The results of these researches show the usefulness of applying cross-over operator in solving optimization problems by Evolutionary Algorithms (EA). In this study, the idea of adding crossover operator to EEAs is investigated. Two EEAs which recently have been developed by researchers are implemented in this work namely: Extinction Evolutionary Programming (EEP) and Self-Organized Criticality Extinction (SOCE). Both of these algorithms are modified by adding crossover operator. Finally, modified versions of algorithms and classical ones are compared and contrasted against each other in terms of converegence time and accuracy of optimizazation on several benchmark optimization functions. Results show modified algorithms outperform classical ones in majority of cases. The results confirms the hypothesis that says “crossover is not useful rigorously in all applications”.
{"title":"Adding Crossover to Extinction-Based Evolutionary Algorithms","authors":"Ahmadreza Ghaffarizadeh, Kamelia Ahmadi, M. Eftekhari","doi":"10.1109/ICCEE.2009.125","DOIUrl":"https://doi.org/10.1109/ICCEE.2009.125","url":null,"abstract":"Extinction-based Evolutionary Algorithms (EEA) have been recently developed as the solutions for the problem of early convergence in multimodal optimization tasks. The reproduction of EEAs is done only by mutation. Moreover, according to recent studies, several attempts have been made to prove rigorously that crossover is essential for typical optimization problems. The results of these researches show the usefulness of applying cross-over operator in solving optimization problems by Evolutionary Algorithms (EA). In this study, the idea of adding crossover operator to EEAs is investigated. Two EEAs which recently have been developed by researchers are implemented in this work namely: Extinction Evolutionary Programming (EEP) and Self-Organized Criticality Extinction (SOCE). Both of these algorithms are modified by adding crossover operator. Finally, modified versions of algorithms and classical ones are compared and contrasted against each other in terms of converegence time and accuracy of optimizazation on several benchmark optimization functions. Results show modified algorithms outperform classical ones in majority of cases. The results confirms the hypothesis that says “crossover is not useful rigorously in all applications”.","PeriodicalId":343870,"journal":{"name":"2009 Second International Conference on Computer and Electrical Engineering","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131538941","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}
Image registration is an inevitable problem arising in many image-processing applications whenever two or more images of the same scene have to be compared pixel by pixel. The increased volume of satellite images has reinforced the need for automatic image registration methods. In this paper, two new feature-based approaches to automated image-to-image registration are presented. The characteristic of the first approach is that it combines an invariant moment shape descriptor with improved chain-code matching to establish correspondences between the potentially matched regions detected from the two images. This method works well for image pairs in which the contour information is well preserved. For the registration of the optical images with synthetic aperture radar (SAR) images, we propose another method based on the wavelet transform, this second method uses spectral information of the images and their local wavelet transform modulus maxima to extract a set of control points. The experimental result demonstrates the robustness, efficiency and accuracy of the two algorithms.
{"title":"The Practice of an Automatic Registration System Based on Contour Features and Wavelet Transform for Remote Sensing Images","authors":"L. Meddeber, N. Berrached, Abdelmalik Taleb-Ahmed","doi":"10.1109/ICCEE.2009.78","DOIUrl":"https://doi.org/10.1109/ICCEE.2009.78","url":null,"abstract":"Image registration is an inevitable problem arising in many image-processing applications whenever two or more images of the same scene have to be compared pixel by pixel. The increased volume of satellite images has reinforced the need for automatic image registration methods. In this paper, two new feature-based approaches to automated image-to-image registration are presented. The characteristic of the first approach is that it combines an invariant moment shape descriptor with improved chain-code matching to establish correspondences between the potentially matched regions detected from the two images. This method works well for image pairs in which the contour information is well preserved. For the registration of the optical images with synthetic aperture radar (SAR) images, we propose another method based on the wavelet transform, this second method uses spectral information of the images and their local wavelet transform modulus maxima to extract a set of control points. The experimental result demonstrates the robustness, efficiency and accuracy of the two algorithms.","PeriodicalId":343870,"journal":{"name":"2009 Second International Conference on Computer and Electrical Engineering","volume":"209 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116517669","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}
Static Synchronous Series Compensator (SSSC) is a series connected FACTS devices. It is able to providing the reactive power compensation of power system. The SSSC injects a series ac voltage to transmission line through a transformer, which leads or lags the line current by 90°, thus emulating a controllable inductive or capacitive reactance. SSSC can be used to reduce the equivalent line impedance and thus enhance the active power transfer capability of the transmission line. SSSC is conventionally realized with a voltage-source converter. In this paper, an SSSC based on the current-source converter topology is proposed. The injected voltage is controlled according to the desired reactive power compensation. The decoupled state-feedback control for the injected voltage with a separated dc current control is applied to the proposed system. The advantages of the proposed scheme include fast dynamic response and high quality of current and voltage waveforms. The proposed SSSC has been simulated using the MATLAB software. The simulation results show that excellent current and voltage waveforms as well as very short response times can be obtained while operating at a low switching frequency. This makes the proposed scheme suitable for high power applications.
{"title":"Modeling and State Feedback Controller of SSSC Based Current Source Converter","authors":"A. Ajami, Mehdi Armaghan","doi":"10.1109/ICCEE.2009.87","DOIUrl":"https://doi.org/10.1109/ICCEE.2009.87","url":null,"abstract":"Static Synchronous Series Compensator (SSSC) is a series connected FACTS devices. It is able to providing the reactive power compensation of power system. The SSSC injects a series ac voltage to transmission line through a transformer, which leads or lags the line current by 90°, thus emulating a controllable inductive or capacitive reactance. SSSC can be used to reduce the equivalent line impedance and thus enhance the active power transfer capability of the transmission line. SSSC is conventionally realized with a voltage-source converter. In this paper, an SSSC based on the current-source converter topology is proposed. The injected voltage is controlled according to the desired reactive power compensation. The decoupled state-feedback control for the injected voltage with a separated dc current control is applied to the proposed system. The advantages of the proposed scheme include fast dynamic response and high quality of current and voltage waveforms. The proposed SSSC has been simulated using the MATLAB software. The simulation results show that excellent current and voltage waveforms as well as very short response times can be obtained while operating at a low switching frequency. This makes the proposed scheme suitable for high power applications.","PeriodicalId":343870,"journal":{"name":"2009 Second International Conference on Computer and Electrical Engineering","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128044688","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}
There is interest in getting high bit rate over satellite channel containing a nonlinear power amplifier. This paper studies different orders of amplitude phase shift keying (APK) modulation, 16-ary quadrature amplitude modulation (QAM) and predistortion considerations over the satellite power amplifier. Satellite transmission channel has been modelled to simulate and compare between methods for a better performance. The Saleh Model and Ghobni model has been selected from literature measurements of the travelling-wave tube-amplifier (TWTA) and solid state-power-amplifier (SSPA) respectively; however, in the simulation the TWTA gives better performance than SSPA in most modulation techniques. It was investigated with preditortion and without predistortion the best modulation constellation performance under nonlinear communication channel.
{"title":"Performance Evaluation of APK Modulation for Nonlinear Satellite Communication Channel","authors":"Abdussalam Baryun","doi":"10.1109/ICCEE.2009.227","DOIUrl":"https://doi.org/10.1109/ICCEE.2009.227","url":null,"abstract":"There is interest in getting high bit rate over satellite channel containing a nonlinear power amplifier. This paper studies different orders of amplitude phase shift keying (APK) modulation, 16-ary quadrature amplitude modulation (QAM) and predistortion considerations over the satellite power amplifier. Satellite transmission channel has been modelled to simulate and compare between methods for a better performance. The Saleh Model and Ghobni model has been selected from literature measurements of the travelling-wave tube-amplifier (TWTA) and solid state-power-amplifier (SSPA) respectively; however, in the simulation the TWTA gives better performance than SSPA in most modulation techniques. It was investigated with preditortion and without predistortion the best modulation constellation performance under nonlinear communication channel.","PeriodicalId":343870,"journal":{"name":"2009 Second International Conference on Computer and Electrical Engineering","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132240547","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}
In order to solve the problem of disturbance due to data sparsity for the baseline phone n-gram system, a method based on Phone N-gram pruning and KPCA is brought forward. The phone n-gram with low probability is firstly pruned in the phone n-gram super vector. The kernel principal component analysis (KPCA) is then adopted to remove the bias which is brought about due to data sparse. When applying this method to the NIST 2006 speaker recognition evaluation (SRE) database, experimental results shows that a relative reduction of up to 29% in Error Equal Ratio (EER) is achieved over the previous baseline phone n-gram system.
{"title":"Speaker Recognition Method Based on Phone N-gram Pruning and KPCA","authors":"Hongge Yao, Wu Guo","doi":"10.1109/ICCEE.2009.21","DOIUrl":"https://doi.org/10.1109/ICCEE.2009.21","url":null,"abstract":"In order to solve the problem of disturbance due to data sparsity for the baseline phone n-gram system, a method based on Phone N-gram pruning and KPCA is brought forward. The phone n-gram with low probability is firstly pruned in the phone n-gram super vector. The kernel principal component analysis (KPCA) is then adopted to remove the bias which is brought about due to data sparse. When applying this method to the NIST 2006 speaker recognition evaluation (SRE) database, experimental results shows that a relative reduction of up to 29% in Error Equal Ratio (EER) is achieved over the previous baseline phone n-gram system.","PeriodicalId":343870,"journal":{"name":"2009 Second International Conference on Computer and Electrical Engineering","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115673103","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}
S. Ghayekhloo, M. Sedighi, R. Nassiri, G. L. Shabgahi, H. K. Tirkolaei
IT service management has become both more sophisticated and more critical to the business. we are now in an era in which an IT failure or error can interrupt critical business processes, severely damages a corporation 's image, affects the bottom line, and even impacts a company 's stock valuation. As far as organizations become more reliant on technology, the need for reliable, well managed services continues to increase. With this increased demand on IT performance, IT needs a well-defined process to ensure that IT operations are maintained at optimal levels. In this paper, we aim to scrutinize a few critical factors which may put the successful deployment of ITIL in risk for a few Iranian entities as a sample of developing countries.
{"title":"Pathology of Organizations Currently Implementing ITIL in Developing Countries","authors":"S. Ghayekhloo, M. Sedighi, R. Nassiri, G. L. Shabgahi, H. K. Tirkolaei","doi":"10.1109/ICCEE.2009.260","DOIUrl":"https://doi.org/10.1109/ICCEE.2009.260","url":null,"abstract":"IT service management has become both more sophisticated and more critical to the business. we are now in an era in which an IT failure or error can interrupt critical business processes, severely damages a corporation 's image, affects the bottom line, and even impacts a company 's stock valuation. As far as organizations become more reliant on technology, the need for reliable, well managed services continues to increase. With this increased demand on IT performance, IT needs a well-defined process to ensure that IT operations are maintained at optimal levels. In this paper, we aim to scrutinize a few critical factors which may put the successful deployment of ITIL in risk for a few Iranian entities as a sample of developing countries.","PeriodicalId":343870,"journal":{"name":"2009 Second International Conference on Computer and Electrical Engineering","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114162936","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}
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