Pub Date : 2014-12-01DOI: 10.1109/ICECE.2014.7026975
A. Chowdhury, Md. Asaduz-Zaman
Control of active power and frequency in a power system is referred to as load frequency control (LFC). A linear combination of tie line power between interconnected system and frequency deviations, defined as area control error (ACE), is regulated to zero by LFC such that frequency and tie-line power errors are forced to zeros and a balance is achieved between generation and load. This paper presents an investigation on the LFC of multi-microgrid (MMG) using energy storage system (ESS). The tie-line connected MMG system consists of two microgrids, each made up of a synchronous generator, a PV source, a wind power system, ESS and load. Control strategies are developed based on both, frequency deviation and ACE, to regulate the ESS output. A performance index is defined for comparative assessment of control strategies. Effectiveness of the frequency control strategies is studied through simulation.
{"title":"Load frequency control of multi-microgrid using energy storage system","authors":"A. Chowdhury, Md. Asaduz-Zaman","doi":"10.1109/ICECE.2014.7026975","DOIUrl":"https://doi.org/10.1109/ICECE.2014.7026975","url":null,"abstract":"Control of active power and frequency in a power system is referred to as load frequency control (LFC). A linear combination of tie line power between interconnected system and frequency deviations, defined as area control error (ACE), is regulated to zero by LFC such that frequency and tie-line power errors are forced to zeros and a balance is achieved between generation and load. This paper presents an investigation on the LFC of multi-microgrid (MMG) using energy storage system (ESS). The tie-line connected MMG system consists of two microgrids, each made up of a synchronous generator, a PV source, a wind power system, ESS and load. Control strategies are developed based on both, frequency deviation and ACE, to regulate the ESS output. A performance index is defined for comparative assessment of control strategies. Effectiveness of the frequency control strategies is studied through simulation.","PeriodicalId":335492,"journal":{"name":"8th International Conference on Electrical and Computer Engineering","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126664228","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 : 2014-12-01DOI: 10.1109/ICECE.2014.7026820
A. Dutta
Traditional imaging has been limited to the visible spectrum that humans can see. Imaging technologies are transcending into the invisible spectrums in the infrared (IR) region to enable imaging beyond human vision. We highlight the capabilities and advantages and therefore the value of IR imaging focused primarily on shortwave IR (SWIR) with some elements of long wave IR (LWIR) over the visible spectrum (VIS). We present an overview of SWIR and LWIR device structures based on InP and HgCdTe devices for the respective bands. We also highlight our development of a high-performance multispectral camera system for VIS-SWIR imaging for the most demanding high-sensitivity and high-speed commercial and industrial applications. The 640×512 pixel VIS-SWIR camera system is designed to provide a compact, small-form factor to within a cubic inch, high sensitivity needing less than 100 electrons, high dynamic range exceeding 190 dB, and high-frame rates (>1000 FPS) at full resolution.
{"title":"Imaging beyond human vision","authors":"A. Dutta","doi":"10.1109/ICECE.2014.7026820","DOIUrl":"https://doi.org/10.1109/ICECE.2014.7026820","url":null,"abstract":"Traditional imaging has been limited to the visible spectrum that humans can see. Imaging technologies are transcending into the invisible spectrums in the infrared (IR) region to enable imaging beyond human vision. We highlight the capabilities and advantages and therefore the value of IR imaging focused primarily on shortwave IR (SWIR) with some elements of long wave IR (LWIR) over the visible spectrum (VIS). We present an overview of SWIR and LWIR device structures based on InP and HgCdTe devices for the respective bands. We also highlight our development of a high-performance multispectral camera system for VIS-SWIR imaging for the most demanding high-sensitivity and high-speed commercial and industrial applications. The 640×512 pixel VIS-SWIR camera system is designed to provide a compact, small-form factor to within a cubic inch, high sensitivity needing less than 100 electrons, high dynamic range exceeding 190 dB, and high-frame rates (>1000 FPS) at full resolution.","PeriodicalId":335492,"journal":{"name":"8th International Conference on Electrical and Computer Engineering","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123679754","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 : 2014-12-01DOI: 10.1109/ICECE.2014.7026868
Biswajit Pal, S. Dwari
A simple novel compact three-order microstrip bandpass filter is proposed using half wavelength microstrip line resonators coupled through parallel stub lines. The filter has two signal paths, one through the parallel coupled lines of resonators and other through the electrical coupling between feed lines for which the filter shows two transmission zeros. The proposed filter has a bandwidth of 1 GHz covering WLAN 5.2/5.8 GHz and WiMAX 5.5 GHz bands. The filter is compact and simple structure having very low insertion loss in the passband makes it suitable for wireless application.
{"title":"Three-order microstrip bandpass filter with two transmission zeros for WLAN/WiMAX applications","authors":"Biswajit Pal, S. Dwari","doi":"10.1109/ICECE.2014.7026868","DOIUrl":"https://doi.org/10.1109/ICECE.2014.7026868","url":null,"abstract":"A simple novel compact three-order microstrip bandpass filter is proposed using half wavelength microstrip line resonators coupled through parallel stub lines. The filter has two signal paths, one through the parallel coupled lines of resonators and other through the electrical coupling between feed lines for which the filter shows two transmission zeros. The proposed filter has a bandwidth of 1 GHz covering WLAN 5.2/5.8 GHz and WiMAX 5.5 GHz bands. The filter is compact and simple structure having very low insertion loss in the passband makes it suitable for wireless application.","PeriodicalId":335492,"journal":{"name":"8th International Conference on Electrical and Computer Engineering","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121563975","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 : 2014-12-01DOI: 10.1109/ICECE.2014.7026914
A. Shadman, Ehsanur Rahman, S. Biswas, Kanak Datta, Q. Khosru
In this paper, impact of device & process parameter variation on quantum ballistic Current-Voltage (I-V) characteristics of a surface channel, High K stack gate Quantum Well MOSFET is simulated. Physical device parameters like channel thickness, gate dielectric thickness and process parameters like doping density have direct effects on quantum ballistic current. We use mode space approach with NEGF formalism to simulate Current-Voltage (I-V) characteristics. Short Channel effects (SCE) are studied from the simulation for these variations. Observed effect is scaling dielectric & channel thickness results in better subthreshold slope & Drain induced barrier lowering at the cost of On-current. By increasing doping concentration, ballistic current can be improved. However with increasing doping density, SCE effects are compromised.
{"title":"Ballistic transport characteristic of ingaas quantum well surface channel MOSFET including effects of physical device parameter","authors":"A. Shadman, Ehsanur Rahman, S. Biswas, Kanak Datta, Q. Khosru","doi":"10.1109/ICECE.2014.7026914","DOIUrl":"https://doi.org/10.1109/ICECE.2014.7026914","url":null,"abstract":"In this paper, impact of device & process parameter variation on quantum ballistic Current-Voltage (I-V) characteristics of a surface channel, High K stack gate Quantum Well MOSFET is simulated. Physical device parameters like channel thickness, gate dielectric thickness and process parameters like doping density have direct effects on quantum ballistic current. We use mode space approach with NEGF formalism to simulate Current-Voltage (I-V) characteristics. Short Channel effects (SCE) are studied from the simulation for these variations. Observed effect is scaling dielectric & channel thickness results in better subthreshold slope & Drain induced barrier lowering at the cost of On-current. By increasing doping concentration, ballistic current can be improved. However with increasing doping density, SCE effects are compromised.","PeriodicalId":335492,"journal":{"name":"8th International Conference on Electrical and Computer Engineering","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122604590","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 : 2014-12-01DOI: 10.1109/ICECE.2014.7026976
Md. Mijanur Rahman, A. Chowdhury
Active disturbance rejection control (ADRC) has gained significant attraction due to its simple tuning method and robustness against process parameter variations, whether the plant is linear or non-linear, time-varying or time-invariant. In load frequency control, the use of ADRC is proposed to regulate the area control error, frequency error and tie-line error in the presence of internal dynamics and external disturbance. This paper presents a study on the effects of state observer bandwidth, controller bandwidth and sampling period on the performance of the ADRC based load frequency control of single- and multi- area power systems. The study gives good insight in choosing controller parameters for ADRC based LFC.
{"title":"Parameterization of active disturbance rejection controller for load frequency control","authors":"Md. Mijanur Rahman, A. Chowdhury","doi":"10.1109/ICECE.2014.7026976","DOIUrl":"https://doi.org/10.1109/ICECE.2014.7026976","url":null,"abstract":"Active disturbance rejection control (ADRC) has gained significant attraction due to its simple tuning method and robustness against process parameter variations, whether the plant is linear or non-linear, time-varying or time-invariant. In load frequency control, the use of ADRC is proposed to regulate the area control error, frequency error and tie-line error in the presence of internal dynamics and external disturbance. This paper presents a study on the effects of state observer bandwidth, controller bandwidth and sampling period on the performance of the ADRC based load frequency control of single- and multi- area power systems. The study gives good insight in choosing controller parameters for ADRC based LFC.","PeriodicalId":335492,"journal":{"name":"8th International Conference on Electrical and Computer Engineering","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122693644","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 : 2014-12-01DOI: 10.1109/ICECE.2014.7026941
K. A. Shahriar, Ikramul Hasan Sohel, Md Mahamudun Arif Joy, R. H. Sagor, M. G. Saber
The Lorentz model parameters for alumina, aluminum arsenide, zinc oxide, potassium bromide, graphene and gallium arsenide are optimized using a nonlinear optimization algorithm based on the Hooke and Jeeves method. The complex relative permittivity of each of the mentioned materials is calculated over a long wavelength range using the optimized parameters. The obtained permittivity curves exhibit very good match with those obtained from the experimental results. The symmetric SPP mode propagation through MDM waveguides containing alumina and aluminum arsenide as dielectric layers sandwiched between layers of silver has been investigated using their optimized modeling parameters.
{"title":"Extraction of lorentz model parameters for dielectrics and their application in nanoplasmonics","authors":"K. A. Shahriar, Ikramul Hasan Sohel, Md Mahamudun Arif Joy, R. H. Sagor, M. G. Saber","doi":"10.1109/ICECE.2014.7026941","DOIUrl":"https://doi.org/10.1109/ICECE.2014.7026941","url":null,"abstract":"The Lorentz model parameters for alumina, aluminum arsenide, zinc oxide, potassium bromide, graphene and gallium arsenide are optimized using a nonlinear optimization algorithm based on the Hooke and Jeeves method. The complex relative permittivity of each of the mentioned materials is calculated over a long wavelength range using the optimized parameters. The obtained permittivity curves exhibit very good match with those obtained from the experimental results. The symmetric SPP mode propagation through MDM waveguides containing alumina and aluminum arsenide as dielectric layers sandwiched between layers of silver has been investigated using their optimized modeling parameters.","PeriodicalId":335492,"journal":{"name":"8th International Conference on Electrical and Computer Engineering","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131911050","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 : 2014-12-01DOI: 10.1109/ICECE.2014.7026893
Md Moin Uddin Chowdhury, Md. Asif Tanveer, M. Uddin
In this paper, the performance of carrier sense multiple access with collision avoidance (CSMA/CA) based multi-user MIMO (MU-MIMO) uplink wireless local area networks (WLANs) is analysed. Analytical models are provided to compute the throughput of each user and the total energy consumption in a WLAN with a single user MIMO (SU-MIMO) technique as well as a MU-MIMO technique. By means of the analytical models, the throughput, fairness and energy consumption performances are studied for several WLAN scenarios. The numerical results show that the MU-MIMO technique provides higher throughput than the SU-MIMO technique only when the number of MIMO communication antennas is high and the medium access parameters of the users are configured properly. Further, the SU-MIMO technique is found to be more energy efficient than the MU-MIMO technique. However, the MU-MIMO technique provides better fairness over the SU-MIMO technique.
{"title":"Performance analysis of CSMA/CA based MU-MIMO WLANs","authors":"Md Moin Uddin Chowdhury, Md. Asif Tanveer, M. Uddin","doi":"10.1109/ICECE.2014.7026893","DOIUrl":"https://doi.org/10.1109/ICECE.2014.7026893","url":null,"abstract":"In this paper, the performance of carrier sense multiple access with collision avoidance (CSMA/CA) based multi-user MIMO (MU-MIMO) uplink wireless local area networks (WLANs) is analysed. Analytical models are provided to compute the throughput of each user and the total energy consumption in a WLAN with a single user MIMO (SU-MIMO) technique as well as a MU-MIMO technique. By means of the analytical models, the throughput, fairness and energy consumption performances are studied for several WLAN scenarios. The numerical results show that the MU-MIMO technique provides higher throughput than the SU-MIMO technique only when the number of MIMO communication antennas is high and the medium access parameters of the users are configured properly. Further, the SU-MIMO technique is found to be more energy efficient than the MU-MIMO technique. However, the MU-MIMO technique provides better fairness over the SU-MIMO technique.","PeriodicalId":335492,"journal":{"name":"8th International Conference on Electrical and Computer Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130516108","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 : 2014-12-01DOI: 10.1109/ICECE.2014.7026909
Tanni Mittra, M. Ali
Recent advances of information and communication technology provides huge amount of heterogeneous information available for us. But integration of information semantically and provide machine understandable meaning to information is still a great challenge in current web technology. To overcome the challenges, ontology matching plays a vital role, which is introduced by semantic web technology. In this paper, we propose a new method of ontology matching using parallelization and distribution technique. To apply parallelism, we develop a partitioning algorithm by using property-by-class and subclass of relationship, which partitions the ontology into smaller cluster. Then the clusters from different ontology are matched based on terminological and structural similarity with semantic verification. These entire tasks of matching are handled in a parallel way and all the tasks are distributed over the computational resources. Thus, we significantly reduce the time complexity and space complexity of large scale matching task. Our proposed method reduces misaligned pairs while increasing correct aligned concepts. Validity of our claims have been substantiated through different experiments on small and large ontologies.
{"title":"Ontology matching by applying parallelization and distribution of matching task within clustering environment","authors":"Tanni Mittra, M. Ali","doi":"10.1109/ICECE.2014.7026909","DOIUrl":"https://doi.org/10.1109/ICECE.2014.7026909","url":null,"abstract":"Recent advances of information and communication technology provides huge amount of heterogeneous information available for us. But integration of information semantically and provide machine understandable meaning to information is still a great challenge in current web technology. To overcome the challenges, ontology matching plays a vital role, which is introduced by semantic web technology. In this paper, we propose a new method of ontology matching using parallelization and distribution technique. To apply parallelism, we develop a partitioning algorithm by using property-by-class and subclass of relationship, which partitions the ontology into smaller cluster. Then the clusters from different ontology are matched based on terminological and structural similarity with semantic verification. These entire tasks of matching are handled in a parallel way and all the tasks are distributed over the computational resources. Thus, we significantly reduce the time complexity and space complexity of large scale matching task. Our proposed method reduces misaligned pairs while increasing correct aligned concepts. Validity of our claims have been substantiated through different experiments on small and large ontologies.","PeriodicalId":335492,"journal":{"name":"8th International Conference on Electrical and Computer Engineering","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124596978","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 : 2014-12-01DOI: 10.1109/ICECE.2014.7026939
Soumitra Roy Joy, F. M. Mohammedy
A quantum mechanical approach of first order born approximation is taken to numerically model AlGaAs/GaAs Quantum Well Infrared detector that operates at long wavelength region (8-9μm). Our numerical analysis of the photocurrent spectra as well as the broadening of the same at 8.31μm peak wavelength is found to be in close resemblance with the experimental result with 8.55μm peak wavelength as reported by Alves et. al. We have gone one step further by subsequently exploring the photo-response behavior of QWIP at the limit of strong electron-photon interaction and found that, besides the modification in photo-current spectrum in terms of relative magnitude and spectral shift, the strong non-linear photo-response enforced by light-matter coupling possesses the potential of accommodating multi-color detection mechanism under moderate bias and high optical density in active region.
{"title":"Quantum mechanical modelling of steady state photoconductive behaviour of AlGaAs/GaAs QWIP at varying bias and optical density","authors":"Soumitra Roy Joy, F. M. Mohammedy","doi":"10.1109/ICECE.2014.7026939","DOIUrl":"https://doi.org/10.1109/ICECE.2014.7026939","url":null,"abstract":"A quantum mechanical approach of first order born approximation is taken to numerically model AlGaAs/GaAs Quantum Well Infrared detector that operates at long wavelength region (8-9μm). Our numerical analysis of the photocurrent spectra as well as the broadening of the same at 8.31μm peak wavelength is found to be in close resemblance with the experimental result with 8.55μm peak wavelength as reported by Alves et. al. We have gone one step further by subsequently exploring the photo-response behavior of QWIP at the limit of strong electron-photon interaction and found that, besides the modification in photo-current spectrum in terms of relative magnitude and spectral shift, the strong non-linear photo-response enforced by light-matter coupling possesses the potential of accommodating multi-color detection mechanism under moderate bias and high optical density in active region.","PeriodicalId":335492,"journal":{"name":"8th International Conference on Electrical and Computer Engineering","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114984927","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 : 2014-12-01DOI: 10.1109/ICECE.2014.7026992
M. Rahman, A. Al Mamun, S. Das
This paper briefly presents a stability analysis of interconnected systems with mixed passivity and negative-imaginary properties in discrete-time. These results are analogous to previously established continuous-time case. As discretization of the system or discrete-time design is an important issue for control system design, this paper provides a base for discretization of “mixed” system with passivity and negative imaginary properties. Numerical example and simulation results demonstrate the effectiveness of the proposed analysis.
{"title":"Interconnected systems with “mixed” passivity and negative-imaginary properties: A stability analysis in discrete-time","authors":"M. Rahman, A. Al Mamun, S. Das","doi":"10.1109/ICECE.2014.7026992","DOIUrl":"https://doi.org/10.1109/ICECE.2014.7026992","url":null,"abstract":"This paper briefly presents a stability analysis of interconnected systems with mixed passivity and negative-imaginary properties in discrete-time. These results are analogous to previously established continuous-time case. As discretization of the system or discrete-time design is an important issue for control system design, this paper provides a base for discretization of “mixed” system with passivity and negative imaginary properties. Numerical example and simulation results demonstrate the effectiveness of the proposed analysis.","PeriodicalId":335492,"journal":{"name":"8th International Conference on Electrical and Computer Engineering","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131171914","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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