Pub Date : 2014-12-01DOI: 10.1109/ICECE.2014.7026980
A. Chowdhury, P. Sarker, K. Rafiqul Islam, Syeda Tahsina Tanjil
Reliability of power transmission corridor is of great importance for the reliability of the bulk power system. Any intermediate substation in the transmission corridor affects its reliability. Studies have been done on reliability of substation in isolation but its effect on transmission corridor has not been studied. Studies on transmission line reliability have also been carried out, but they focused on system connectivity neglecting reaction of system protection. This paper studies the reliability of a transmission corridor with intermediate substation having different configurations. Event tree analysis has been adopted for the purpose. The effect of substation configuration on reliability of the transmission corridor, both qualitatively and quantitatively, is analysed and compared.
{"title":"Effect of intermediate substation configurations on reliability of power transmission corridor","authors":"A. Chowdhury, P. Sarker, K. Rafiqul Islam, Syeda Tahsina Tanjil","doi":"10.1109/ICECE.2014.7026980","DOIUrl":"https://doi.org/10.1109/ICECE.2014.7026980","url":null,"abstract":"Reliability of power transmission corridor is of great importance for the reliability of the bulk power system. Any intermediate substation in the transmission corridor affects its reliability. Studies have been done on reliability of substation in isolation but its effect on transmission corridor has not been studied. Studies on transmission line reliability have also been carried out, but they focused on system connectivity neglecting reaction of system protection. This paper studies the reliability of a transmission corridor with intermediate substation having different configurations. Event tree analysis has been adopted for the purpose. The effect of substation configuration on reliability of the transmission corridor, both qualitatively and quantitatively, is analysed and compared.","PeriodicalId":335492,"journal":{"name":"8th International Conference on Electrical and Computer Engineering","volume":"35 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":"122642769","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.2014.7026930
Abu Shahir Md. Khalid Hasan, R. Rahman, M. A. Haque
Ultrasound elastography is a medical imaging technique to visualize the tissue stiffness using a conventional ultrasound machine. To compute the elastogram, the radiofrequency echo signals are acquired before and after a small applied deformation. Then the local tissue displacement field is estimated by searching the peak of the cross-correlation function between small segments of pre- and post- deformation signals. Finally, the corresponding strain distribution is imaged by differentiating the displacement field. However, the pre- and post- signals are not exactly the shifted versions of one another and hence the displacement estimation is inaccurate and the resulting strain image is highly noisy. In this paper, we propose a novel technique to estimate the strain image from the ratios of the peak frequencies of the pre- and post- deformation signals. Unlike other time/frequency domain reported schemes, our proposed technique does not use cross-correlation or any other similarity measures and directly estimate the strain in the power spectral density domain. Simulation experiments are conducted at various strain conditions and the results show that the proposed method can be an effective and computationally efficient algorithm for ultrasound elastography.
{"title":"Direct strain estimation for ultrasound elastography using peak frequency ratio of radiofrequency echo signals","authors":"Abu Shahir Md. Khalid Hasan, R. Rahman, M. A. Haque","doi":"10.1109/ICECE.2014.7026930","DOIUrl":"https://doi.org/10.1109/ICECE.2014.7026930","url":null,"abstract":"Ultrasound elastography is a medical imaging technique to visualize the tissue stiffness using a conventional ultrasound machine. To compute the elastogram, the radiofrequency echo signals are acquired before and after a small applied deformation. Then the local tissue displacement field is estimated by searching the peak of the cross-correlation function between small segments of pre- and post- deformation signals. Finally, the corresponding strain distribution is imaged by differentiating the displacement field. However, the pre- and post- signals are not exactly the shifted versions of one another and hence the displacement estimation is inaccurate and the resulting strain image is highly noisy. In this paper, we propose a novel technique to estimate the strain image from the ratios of the peak frequencies of the pre- and post- deformation signals. Unlike other time/frequency domain reported schemes, our proposed technique does not use cross-correlation or any other similarity measures and directly estimate the strain in the power spectral density domain. Simulation experiments are conducted at various strain conditions and the results show that the proposed method can be an effective and computationally efficient algorithm for ultrasound elastography.","PeriodicalId":335492,"journal":{"name":"8th International Conference on Electrical and Computer Engineering","volume":"7 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":"126489193","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.2014.7027029
Mohammed E. Ali
In this paper, a local phase correction method is proposed and demonstrated to effectively mitigate mode conversion in coupled transmission line bends leading to significant improvement in their high-speed performance. Signal loss and mode conversion improvements by more than 5 dB and 16 dB respectively at 50 GHz are reported for experimental prototypes. Good correlation has been established among analytical predictions, full-wave electromagnetic simulations and measurements.
{"title":"A local phase correction method to mitigate mode conversion in coupled transmission line bends","authors":"Mohammed E. Ali","doi":"10.1109/ICECE.2014.7027029","DOIUrl":"https://doi.org/10.1109/ICECE.2014.7027029","url":null,"abstract":"In this paper, a local phase correction method is proposed and demonstrated to effectively mitigate mode conversion in coupled transmission line bends leading to significant improvement in their high-speed performance. Signal loss and mode conversion improvements by more than 5 dB and 16 dB respectively at 50 GHz are reported for experimental prototypes. Good correlation has been established among analytical predictions, full-wave electromagnetic simulations and measurements.","PeriodicalId":335492,"journal":{"name":"8th International Conference on Electrical and Computer Engineering","volume":"92 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":"124163435","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.2014.7026911
N. Akter, P. Paul, Sudipta Mondal, S. M. Mominuzzaman
The main objective of this paper is the modeling and analysis of inorganic homo-junction and inorganic-organic hybrid solar cells. For this, an independent model is developed that is capable of simulating the I-V characteristics of any homo-junction solar cell. The efficiency from the model is 14.897% at standard conditions and from PC1D, a commercial software the efficiency is 14.37% under the same conditions. Also hybrid series and hybrid parallel solar cells are modeled. The efficiency of the single inorganic cell is increased from 15% to 19.5% by the hybrid parallel connection.
{"title":"Modeling and analysis of inorganic, organic and hybrid solar cells","authors":"N. Akter, P. Paul, Sudipta Mondal, S. M. Mominuzzaman","doi":"10.1109/ICECE.2014.7026911","DOIUrl":"https://doi.org/10.1109/ICECE.2014.7026911","url":null,"abstract":"The main objective of this paper is the modeling and analysis of inorganic homo-junction and inorganic-organic hybrid solar cells. For this, an independent model is developed that is capable of simulating the I-V characteristics of any homo-junction solar cell. The efficiency from the model is 14.897% at standard conditions and from PC1D, a commercial software the efficiency is 14.37% under the same conditions. Also hybrid series and hybrid parallel solar cells are modeled. The efficiency of the single inorganic cell is increased from 15% to 19.5% by the hybrid parallel connection.","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":"129295096","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.2014.7026846
G. Orfanidis, N. Nikolaidis, A. Tefas, I. Pitas
In this work we proposed a new variant of spectral clustering using double spectral analysis which proved to be able to achieve better clustering results. The present work focuses on the special case of 3D videos and the implication of their use. Various improvements are introduced including the use of stereo over mono videos, the use of double spectral clustering over spectral clustering and the use of multiple representative images per trajectory for more robust trajectory representation. Extended experiments have been conducted in three 3D full feature commercial films which revealed the power of stereo face clustering in comparison with single channel face clustering.
{"title":"Stereo facial image clustering using double spectral analysis","authors":"G. Orfanidis, N. Nikolaidis, A. Tefas, I. Pitas","doi":"10.1109/ICECE.2014.7026846","DOIUrl":"https://doi.org/10.1109/ICECE.2014.7026846","url":null,"abstract":"In this work we proposed a new variant of spectral clustering using double spectral analysis which proved to be able to achieve better clustering results. The present work focuses on the special case of 3D videos and the implication of their use. Various improvements are introduced including the use of stereo over mono videos, the use of double spectral clustering over spectral clustering and the use of multiple representative images per trajectory for more robust trajectory representation. Extended experiments have been conducted in three 3D full feature commercial films which revealed the power of stereo face clustering in comparison with single channel face clustering.","PeriodicalId":335492,"journal":{"name":"8th International Conference on Electrical and Computer Engineering","volume":"14 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":"128427511","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.2014.7026966
M. H. Haque
Self-excited induction generators (SEIG) are increasingly being used in remote areas to energize isolated communities. The maximum power delivery capability of a SEIG depends on various factors, such as excitation capacitance, generator parameters, operating speed and load power factor. This paper proposes a simple method of determining the maximum power that can be delivered by a three-phase SEIG for various operating conditions. The maximum power of the generator is carefully formulated as a multi-variable constrained optimization problem. The problem is then solved using a numerical based routine “fmincon” given in the optimization toolbox of MATLAB. The effectiveness of the proposed method is then evaluated on a 1.5-kW, 220-V induction machine operated as a SEIG. The simulation results obtained by the proposed method are also compared with the corresponding experimental values.
{"title":"Maximum power delivery capability of a three-phase self-excited induction generator","authors":"M. H. Haque","doi":"10.1109/ICECE.2014.7026966","DOIUrl":"https://doi.org/10.1109/ICECE.2014.7026966","url":null,"abstract":"Self-excited induction generators (SEIG) are increasingly being used in remote areas to energize isolated communities. The maximum power delivery capability of a SEIG depends on various factors, such as excitation capacitance, generator parameters, operating speed and load power factor. This paper proposes a simple method of determining the maximum power that can be delivered by a three-phase SEIG for various operating conditions. The maximum power of the generator is carefully formulated as a multi-variable constrained optimization problem. The problem is then solved using a numerical based routine “fmincon” given in the optimization toolbox of MATLAB. The effectiveness of the proposed method is then evaluated on a 1.5-kW, 220-V induction machine operated as a SEIG. The simulation results obtained by the proposed method are also compared with the corresponding experimental values.","PeriodicalId":335492,"journal":{"name":"8th International Conference on Electrical and Computer Engineering","volume":"47 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":"116345462","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.2014.7026958
M A Awal, Zabir Ahmed, Muhammad Anisuzzaman Talukder
We propose and present a semi-analytical model to study the interaction between surface plasmon polaritons generated by phase-matching structures in corrugated dielectric/metal interfaces. The proposed semi-analytical model calculates surface plasmon polariton dynamics that agree well with that found from the full-field vectorial finite difference time domain (FDTD) simulations. The proposed model takes almost no computational time in comparison with FDTD simulations. Therefore, the proposed model can be used instead of FDTD simulations to design and engineer sub-wavelength structures to enhance light confinement. In particular, the proposed model can save significant amount of time to efficiently predict the optimal structural parameters to achieve resonant absorption in metal/dielectric interface of a thin-film solar cell.
{"title":"Semi-analytical model for enhanced surface plasmon polaritons in a corrugated interface","authors":"M A Awal, Zabir Ahmed, Muhammad Anisuzzaman Talukder","doi":"10.1109/ICECE.2014.7026958","DOIUrl":"https://doi.org/10.1109/ICECE.2014.7026958","url":null,"abstract":"We propose and present a semi-analytical model to study the interaction between surface plasmon polaritons generated by phase-matching structures in corrugated dielectric/metal interfaces. The proposed semi-analytical model calculates surface plasmon polariton dynamics that agree well with that found from the full-field vectorial finite difference time domain (FDTD) simulations. The proposed model takes almost no computational time in comparison with FDTD simulations. Therefore, the proposed model can be used instead of FDTD simulations to design and engineer sub-wavelength structures to enhance light confinement. In particular, the proposed model can save significant amount of time to efficiently predict the optimal structural parameters to achieve resonant absorption in metal/dielectric interface of a thin-film solar cell.","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":"114555703","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.2014.7026993
Golam Md. Muradul Bashir, Arpita Howlader, I. Shemu, E. Ety
The complexity of data requirement increasing day by day; therefore minimization of schema becomes an important role for equi distribution or equalization of two or more problems. Schema complexity is measured by transmitting schema to a graph with weight or weighted graph. Selected special fundamentals from schema for weight the schema graph are described as major part. Minimization of schema ensures easy to measure the schema complexity. Some consideration for this approaches are normalization and de-normalization. We also find the effect of normalization and de-normalization on minimization of schema of real life data model as well as synthetic data model. The purpose of this research is to examine the effectiveness of schema complexity based on schema minimization with weighted graph.
{"title":"Effectiveness of minimization and measurement of schema complexity based on weighted graph","authors":"Golam Md. Muradul Bashir, Arpita Howlader, I. Shemu, E. Ety","doi":"10.1109/ICECE.2014.7026993","DOIUrl":"https://doi.org/10.1109/ICECE.2014.7026993","url":null,"abstract":"The complexity of data requirement increasing day by day; therefore minimization of schema becomes an important role for equi distribution or equalization of two or more problems. Schema complexity is measured by transmitting schema to a graph with weight or weighted graph. Selected special fundamentals from schema for weight the schema graph are described as major part. Minimization of schema ensures easy to measure the schema complexity. Some consideration for this approaches are normalization and de-normalization. We also find the effect of normalization and de-normalization on minimization of schema of real life data model as well as synthetic data model. The purpose of this research is to examine the effectiveness of schema complexity based on schema minimization with weighted graph.","PeriodicalId":335492,"journal":{"name":"8th International Conference on Electrical and Computer Engineering","volume":"580 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":"115278923","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.2014.7026869
Sohana Tanzeem, W. Reddick, K. Iftekharuddin
The focus of this work was to develop a 3D mapping of brain tumor (glioma) growth based on cell proliferation and diffusion. In this mathematical model, we incorporated high resolution brain tissue maps (white and gray matter) from an anonymized pediatric patient and initialized the model with a single voxel seed point of tumor with a Gaussian distribution. We used this model to investigate the ratio of growth rate to the diffusion coefficient (ρ/D) which determines the proportion of tumor that is detectable. After expansion of the tumor growth model to three dimensions and solving the differential equations for our specific starting conditions, we performed several simulations to assess tumor growth patterns. After observing the performance of the model at varying time points across a one year time frame with different values for ρ/D, we ascertained that the tumor diffused more rapidly than the cell proliferated for a short period of time followed by an exponential growth in detectable tumor size.
{"title":"3D quantitative brain tumor growth model based on cell proliferation and diffusion","authors":"Sohana Tanzeem, W. Reddick, K. Iftekharuddin","doi":"10.1109/ICECE.2014.7026869","DOIUrl":"https://doi.org/10.1109/ICECE.2014.7026869","url":null,"abstract":"The focus of this work was to develop a 3D mapping of brain tumor (glioma) growth based on cell proliferation and diffusion. In this mathematical model, we incorporated high resolution brain tissue maps (white and gray matter) from an anonymized pediatric patient and initialized the model with a single voxel seed point of tumor with a Gaussian distribution. We used this model to investigate the ratio of growth rate to the diffusion coefficient (ρ/D) which determines the proportion of tumor that is detectable. After expansion of the tumor growth model to three dimensions and solving the differential equations for our specific starting conditions, we performed several simulations to assess tumor growth patterns. After observing the performance of the model at varying time points across a one year time frame with different values for ρ/D, we ascertained that the tumor diffused more rapidly than the cell proliferated for a short period of time followed by an exponential growth in detectable tumor size.","PeriodicalId":335492,"journal":{"name":"8th International Conference on Electrical and Computer Engineering","volume":"175 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":"114378063","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.2014.7026829
S. K. Ahamed, A. Sarkar, M. Mitra, S. Sengupta
In this paper, a new approach for detection of inter-turn short in the stator winding of an induction motor is presented. Discrete Wavelet Transform using DB4 is performed on the envelopes of the windowed steady-state current signatures. The envelopes are determined by applying Hilbert Transform. Low frequency oscillations below 50 Hz were extracted from the reconstructed details at higher wavelet levels. As the envelope works on narrow band frequencies or mono-component signal, it was analyzed using higher wavelet levels which belong to the narrow band harmonics. The RMS and Mean values of the reconstructed details and Power Detail Energy defined as PDE were used as fault parameters to detect the faulty motor from the healthy one. It has been observed that the faulty motor produces higher fault parameters than the healthy one. Laboratory test results confirm the validity of the proposed method.
{"title":"Novel approach for detection of inter-turn short circuit of induction motor's stator winding through envelope analysis","authors":"S. K. Ahamed, A. Sarkar, M. Mitra, S. Sengupta","doi":"10.1109/ICECE.2014.7026829","DOIUrl":"https://doi.org/10.1109/ICECE.2014.7026829","url":null,"abstract":"In this paper, a new approach for detection of inter-turn short in the stator winding of an induction motor is presented. Discrete Wavelet Transform using DB4 is performed on the envelopes of the windowed steady-state current signatures. The envelopes are determined by applying Hilbert Transform. Low frequency oscillations below 50 Hz were extracted from the reconstructed details at higher wavelet levels. As the envelope works on narrow band frequencies or mono-component signal, it was analyzed using higher wavelet levels which belong to the narrow band harmonics. The RMS and Mean values of the reconstructed details and Power Detail Energy defined as PDE were used as fault parameters to detect the faulty motor from the healthy one. It has been observed that the faulty motor produces higher fault parameters than the healthy one. Laboratory test results confirm the validity of the proposed method.","PeriodicalId":335492,"journal":{"name":"8th International Conference on Electrical and Computer Engineering","volume":"4 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":"126652324","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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