Pub Date : 2004-09-05DOI: 10.1109/ICEEC.2004.1374525
G. B. Abadir, W. Fikry, H. Ragai, O. A. Omar
In this work we present a simulation s t u 4 for single events in n’-p junctions. The s t u 4 investigates the variation of both the single-event induced current and the consequent collected charge with bias, substrate doping and minority carrier lifetime. We show that the minority carrier lifetime is the key factor in determining the amount of the total collected charge. We suggest that the reduction of the minority carrier lifetime in the substrate renders the device more immune against single events.
{"title":"A simulation study of single events in n/sup +/-p junctions","authors":"G. B. Abadir, W. Fikry, H. Ragai, O. A. Omar","doi":"10.1109/ICEEC.2004.1374525","DOIUrl":"https://doi.org/10.1109/ICEEC.2004.1374525","url":null,"abstract":"In this work we present a simulation s t u 4 for single events in n’-p junctions. The s t u 4 investigates the variation of both the single-event induced current and the consequent collected charge with bias, substrate doping and minority carrier lifetime. We show that the minority carrier lifetime is the key factor in determining the amount of the total collected charge. We suggest that the reduction of the minority carrier lifetime in the substrate renders the device more immune against single events.","PeriodicalId":180043,"journal":{"name":"International Conference on Electrical, Electronic and Computer Engineering, 2004. ICEEC '04.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114968064","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}
Pub Date : 2004-09-05DOI: 10.1109/ICEEC.2004.1374510
S. Poriazis
The behavior of the 1:13 Phased Demultiplexer (PDMUX13) circuit is analyzed. The circuit demultiplexes the input clock signal into thirteen phased output signals by streaming sets of twenty-six clock phases. A phase difference equal to the half period of the clock is maintained between consecutive output transitions. The VHDL description of the PDMUX13 cell is given and the simulation and synthesis results are generated. A 2-level tree-like structure is built by applying the phased outputs of the PDMUX13 cell into the corresponding clock inputs of thirteen cell replicas that extend the circuit behavior. The EXOR13 gate is attached to the PDMUX13 cell output ports and is aggregating all the phases that the phased clock signals are carrying while preserving their phase associations.
{"title":"The 1:3 phased demultiplexer circuit","authors":"S. Poriazis","doi":"10.1109/ICEEC.2004.1374510","DOIUrl":"https://doi.org/10.1109/ICEEC.2004.1374510","url":null,"abstract":"The behavior of the 1:13 Phased Demultiplexer (PDMUX13) circuit is analyzed. The circuit demultiplexes the input clock signal into thirteen phased output signals by streaming sets of twenty-six clock phases. A phase difference equal to the half period of the clock is maintained between consecutive output transitions. The VHDL description of the PDMUX13 cell is given and the simulation and synthesis results are generated. A 2-level tree-like structure is built by applying the phased outputs of the PDMUX13 cell into the corresponding clock inputs of thirteen cell replicas that extend the circuit behavior. The EXOR13 gate is attached to the PDMUX13 cell output ports and is aggregating all the phases that the phased clock signals are carrying while preserving their phase associations.","PeriodicalId":180043,"journal":{"name":"International Conference on Electrical, Electronic and Computer Engineering, 2004. ICEEC '04.","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121258291","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}
Pub Date : 2004-09-05DOI: 10.1109/ICEEC.2004.1374561
H. Fadel, K. Elsayed, A. Nassar
Abstruct-The localized QoS routing techniques were proposed to achieve acceptable performance without exchanging global state information over the network. In such techniques the source nodes can estimate the network state and make the routing decision locally, hence reducing the signaling traffic at core routers and other network elements. However, using only locally collected information to make routing decision is not a completely reliable technique to achieve trusted QoS performance. The Localized Multi-Path Selection (LMPS) approach is proposed in this paper to overcome the common drawbacks of the localized techniques. The LMPS technique is a multi-path selection algorithm, which selects paths that are capable of satisfying the bandwidth requirement of the call, while at the same time trying to avoid the overloaded links to minimize the overall blocking ratio in the network.
{"title":"Localized quality of service multi-path routing in VoIP networks","authors":"H. Fadel, K. Elsayed, A. Nassar","doi":"10.1109/ICEEC.2004.1374561","DOIUrl":"https://doi.org/10.1109/ICEEC.2004.1374561","url":null,"abstract":"Abstruct-The localized QoS routing techniques were proposed to achieve acceptable performance without exchanging global state information over the network. In such techniques the source nodes can estimate the network state and make the routing decision locally, hence reducing the signaling traffic at core routers and other network elements. However, using only locally collected information to make routing decision is not a completely reliable technique to achieve trusted QoS performance. The Localized Multi-Path Selection (LMPS) approach is proposed in this paper to overcome the common drawbacks of the localized techniques. The LMPS technique is a multi-path selection algorithm, which selects paths that are capable of satisfying the bandwidth requirement of the call, while at the same time trying to avoid the overloaded links to minimize the overall blocking ratio in the network.","PeriodicalId":180043,"journal":{"name":"International Conference on Electrical, Electronic and Computer Engineering, 2004. ICEEC '04.","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123658631","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}
Pub Date : 2004-09-05DOI: 10.1109/ICEEC.2004.1374625
A. Sharaf, Guosheng Wang
High Impedance Arc-Type Faults (HIF) on Meshed Electrical DistributiodUtilization networks are characterized by an intermittent Arc-type nature and low-level of the fault currents. The detection of low-level ground-currents using any conventional over-current or ground fault type relays is both difficult and sometimes inaccurate. [ 1-71. The Arc-nature of all (HIF) faults, being intermittent in nature, characterized by very low level fault current is also rich in low harmonic content and high frequency noise spectra that identify and fingerprint any existence of Arc hazardous HIF faults. High Impedance Arc-Type faults are safety hazard to Humans, Live stocks and Electric Utility Personnel. If left undetected for hours, weeks, and possibly months can prove fatal to humans and animals at typical current level of 50 milliampere or above. The need to find a simple, fast and accurate detection scheme using only time domain substation voltage and current signals (few cycles) at the feeder is the motivation for this novel Pattendshape Based Recognition and Identification approach. Other techniques by the first author [8-101 encompass Neutral Residual harmonics, excursion harmonic-vector, frequency-based nonlinear transformations, Artificial Neural Network and this new concept of the Harmonic PattemsPhase Portraits (HPP-Concept) introduced in this paper. Other detection algorithms are based on Fourier Transform and search methods [I I].
{"title":"High impedence fault detection using low - order pattern harmonic detection","authors":"A. Sharaf, Guosheng Wang","doi":"10.1109/ICEEC.2004.1374625","DOIUrl":"https://doi.org/10.1109/ICEEC.2004.1374625","url":null,"abstract":"High Impedance Arc-Type Faults (HIF) on Meshed Electrical DistributiodUtilization networks are characterized by an intermittent Arc-type nature and low-level of the fault currents. The detection of low-level ground-currents using any conventional over-current or ground fault type relays is both difficult and sometimes inaccurate. [ 1-71. The Arc-nature of all (HIF) faults, being intermittent in nature, characterized by very low level fault current is also rich in low harmonic content and high frequency noise spectra that identify and fingerprint any existence of Arc hazardous HIF faults. High Impedance Arc-Type faults are safety hazard to Humans, Live stocks and Electric Utility Personnel. If left undetected for hours, weeks, and possibly months can prove fatal to humans and animals at typical current level of 50 milliampere or above. The need to find a simple, fast and accurate detection scheme using only time domain substation voltage and current signals (few cycles) at the feeder is the motivation for this novel Pattendshape Based Recognition and Identification approach. Other techniques by the first author [8-101 encompass Neutral Residual harmonics, excursion harmonic-vector, frequency-based nonlinear transformations, Artificial Neural Network and this new concept of the Harmonic PattemsPhase Portraits (HPP-Concept) introduced in this paper. Other detection algorithms are based on Fourier Transform and search methods [I I].","PeriodicalId":180043,"journal":{"name":"International Conference on Electrical, Electronic and Computer Engineering, 2004. ICEEC '04.","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123862622","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}
Pub Date : 2004-09-05DOI: 10.1109/ICEEC.2004.1374512
A. Keshk
Bridging faults and fault disturbances models ofjlash memories are presented in this work. Simulation results show that some of bridging faults are cause disturbances to the same row or column cells. New test algorithm for testing bridging faults and disturbances are proposed. The test length of the proposed method is shorter than the previous methods, which considered only disturbance faults.
{"title":"Flash memory testing for realistic fault modeling ICEEC2004","authors":"A. Keshk","doi":"10.1109/ICEEC.2004.1374512","DOIUrl":"https://doi.org/10.1109/ICEEC.2004.1374512","url":null,"abstract":"Bridging faults and fault disturbances models ofjlash memories are presented in this work. Simulation results show that some of bridging faults are cause disturbances to the same row or column cells. New test algorithm for testing bridging faults and disturbances are proposed. The test length of the proposed method is shorter than the previous methods, which considered only disturbance faults.","PeriodicalId":180043,"journal":{"name":"International Conference on Electrical, Electronic and Computer Engineering, 2004. ICEEC '04.","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122814749","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}
Pub Date : 2004-09-05DOI: 10.1109/ICEEC.2004.1374456
S. Mahmoud, M. El-Melegy
This paper focuses on evaluating a number of statistical and neural methods for supervised, pixel-wise remote-sensing image classification and decision fusion. Despite the enormous progress in the analysis of remote sensing imagery over the past three decades, still much is desired in the area of image classiJication as no specxjk algorithm is known to provide accurate results under all circumstances. Decision fusion may be pursued to combine the outputs of dflerent classifiers applied on the same data, in the hope of combining the best of what each approach provides. We report the results of the comparison between several classification and fusion methods on two real datasets, one of which is the standard benchmark Satimage dataset. It is shown that the fusion approaches can indeed outpei$orm the pei$ormance of the best classif er.
{"title":"Statistical and neural methods for remote-sensing image classification and decision fusion: a comparative study","authors":"S. Mahmoud, M. El-Melegy","doi":"10.1109/ICEEC.2004.1374456","DOIUrl":"https://doi.org/10.1109/ICEEC.2004.1374456","url":null,"abstract":"This paper focuses on evaluating a number of statistical and neural methods for supervised, pixel-wise remote-sensing image classification and decision fusion. Despite the enormous progress in the analysis of remote sensing imagery over the past three decades, still much is desired in the area of image classiJication as no specxjk algorithm is known to provide accurate results under all circumstances. Decision fusion may be pursued to combine the outputs of dflerent classifiers applied on the same data, in the hope of combining the best of what each approach provides. We report the results of the comparison between several classification and fusion methods on two real datasets, one of which is the standard benchmark Satimage dataset. It is shown that the fusion approaches can indeed outpei$orm the pei$ormance of the best classif er.","PeriodicalId":180043,"journal":{"name":"International Conference on Electrical, Electronic and Computer Engineering, 2004. ICEEC '04.","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122210489","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}
Pub Date : 2004-09-05DOI: 10.1109/ICEEC.2004.1374559
Ola A. Al-Sonosy, A. El-Nahas, A. Hamad
We consider the problem of locating mobile users in wireless networks with the focus on minimizing the overall cost incurred by the two main activities involved, mainly lookup and update. We propose a location update protocol that relies on the deployment of prediction techniques along with the Direction Based Update algorithm. The proposed protocol is implemented over both random walk and random waypoint mobility patterns. The results obtained proved a reduction in the overall cost up to 47% compared to the direction based location update scheme with line paging for random waypoint mobility pattern.
{"title":"Predictive direction location update scheme for next generation PCS networks","authors":"Ola A. Al-Sonosy, A. El-Nahas, A. Hamad","doi":"10.1109/ICEEC.2004.1374559","DOIUrl":"https://doi.org/10.1109/ICEEC.2004.1374559","url":null,"abstract":"We consider the problem of locating mobile users in wireless networks with the focus on minimizing the overall cost incurred by the two main activities involved, mainly lookup and update. We propose a location update protocol that relies on the deployment of prediction techniques along with the Direction Based Update algorithm. The proposed protocol is implemented over both random walk and random waypoint mobility patterns. The results obtained proved a reduction in the overall cost up to 47% compared to the direction based location update scheme with line paging for random waypoint mobility pattern.","PeriodicalId":180043,"journal":{"name":"International Conference on Electrical, Electronic and Computer Engineering, 2004. ICEEC '04.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122562919","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}
Pub Date : 2004-09-05DOI: 10.1109/ICEEC.2004.1374631
M. Azab
This paper proposes a new control schemes for three phase PWM rectifiers which is easy to implement. The method is based on decoupled control of instantaneous active and reactive power components, where the corresponding reference ac line currents are obtained using two PI-controllers loops. One PI controller is for the active power loop and the other is for the reactive power component. This scheme can be considered as simplified direct power control valid for both three-phase and single-phase PWM rectifiers. Both dynamic and steady state performance are studied. According to the obtained results, the control scheme offers several advantages such as: control of dc side voltage, fast dynamic performance, and sinusoidal ac line currents. Moreover, the proposed scheme does not require high sampling rates which was the major drawback of conventional direct power control strategy.
{"title":"Decoupled control of active and reactive power for three phase PWM rectifiers","authors":"M. Azab","doi":"10.1109/ICEEC.2004.1374631","DOIUrl":"https://doi.org/10.1109/ICEEC.2004.1374631","url":null,"abstract":"This paper proposes a new control schemes for three phase PWM rectifiers which is easy to implement. The method is based on decoupled control of instantaneous active and reactive power components, where the corresponding reference ac line currents are obtained using two PI-controllers loops. One PI controller is for the active power loop and the other is for the reactive power component. This scheme can be considered as simplified direct power control valid for both three-phase and single-phase PWM rectifiers. Both dynamic and steady state performance are studied. According to the obtained results, the control scheme offers several advantages such as: control of dc side voltage, fast dynamic performance, and sinusoidal ac line currents. Moreover, the proposed scheme does not require high sampling rates which was the major drawback of conventional direct power control strategy.","PeriodicalId":180043,"journal":{"name":"International Conference on Electrical, Electronic and Computer Engineering, 2004. ICEEC '04.","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122891550","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}
Pub Date : 2004-09-05DOI: 10.1109/ICEEC.2004.1374611
A. Boukhelifa, M. Kherbouch, A. Chériti, R. Ibtiouen, O. Touhami, R. Tahmi
: This paper presents , the stator current minimization in an induction machine controlled by the oriented flux method. This minimization is realized by two different methods, a dynamic programming and the optimization in permanent operating regime. Flux in the machine is no more constant as it is the case in the conventional vectorial control, but it evolves according to the operating point. The theoretical results obtained from the simulation of the optimization methods are presented at the end of this article. These results are compared to those resulting from constant flux operation.
{"title":"Stator current minimization by field optimization in induction machine","authors":"A. Boukhelifa, M. Kherbouch, A. Chériti, R. Ibtiouen, O. Touhami, R. Tahmi","doi":"10.1109/ICEEC.2004.1374611","DOIUrl":"https://doi.org/10.1109/ICEEC.2004.1374611","url":null,"abstract":": This paper presents , the stator current minimization in an induction machine controlled by the oriented flux method. This minimization is realized by two different methods, a dynamic programming and the optimization in permanent operating regime. Flux in the machine is no more constant as it is the case in the conventional vectorial control, but it evolves according to the operating point. The theoretical results obtained from the simulation of the optimization methods are presented at the end of this article. These results are compared to those resulting from constant flux operation.","PeriodicalId":180043,"journal":{"name":"International Conference on Electrical, Electronic and Computer Engineering, 2004. ICEEC '04.","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126617897","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}
Pub Date : 2004-09-05DOI: 10.1109/ICEEC.2004.1374386
A.E.M. Ibrahim, D. House
We have developed a genetic algorithm approach for automatically generating procedural textures. Our system, known as GenShade, evaluates evolutionarily generated procedural textures by comparing their rendered images with single or multiple target images of a desired texture. It uses a multiresolution image querying metric to automatically prioritize parents for breeding. GenShade uses a novel approach to the genetic algorithm problem, mimicking several key factors in natural selection. It employs a multiple generation breeding population, a notion of gender, and the concept of aging to maintain diversity while providing many breeding opportunities to highly successful offspring. The approach is also especially efficient running in a multiple processor, multiple selectionstrategy mode. This paper discusses and evaluates these Genetic Algorithm extensions.
{"title":"Genetic algorithm extensions","authors":"A.E.M. Ibrahim, D. House","doi":"10.1109/ICEEC.2004.1374386","DOIUrl":"https://doi.org/10.1109/ICEEC.2004.1374386","url":null,"abstract":"We have developed a genetic algorithm approach for automatically generating procedural textures. Our system, known as GenShade, evaluates evolutionarily generated procedural textures by comparing their rendered images with single or multiple target images of a desired texture. It uses a multiresolution image querying metric to automatically prioritize parents for breeding. GenShade uses a novel approach to the genetic algorithm problem, mimicking several key factors in natural selection. It employs a multiple generation breeding population, a notion of gender, and the concept of aging to maintain diversity while providing many breeding opportunities to highly successful offspring. The approach is also especially efficient running in a multiple processor, multiple selectionstrategy mode. This paper discusses and evaluates these Genetic Algorithm extensions.","PeriodicalId":180043,"journal":{"name":"International Conference on Electrical, Electronic and Computer Engineering, 2004. ICEEC '04.","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131304884","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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