Pub Date : 2017-03-01DOI: 10.1109/IEECON.2017.8075831
Narathep Sakunnithimetha, U. Tuntoolavest
A new ARQ strategy is proposed for nonbinary convolutional codes with Vector symbol decoder (VSD). With one code word for each frame, VSD-ARQ is more efficient than the selective repeat (SR-ARQ) in terms of retransmission data length. VSD can report when it cannot decode and where the erroneous symbols start. For the (63,51) RS inner-(3,2,2) convolutional outer code and 51-symbol code word, VSD-ARQ saves up to 72.03 % of the retransmission data compared to SR-ARQ for NB-PLC and up to 73.01% for BB-PLC at SNR 26 dB. Shorter code words have a better probability of decoding failure without ARQ. However, with VSD-ARQ, they save less than the longer code words and have a lower code rate. VSD-ARQ uses less buffer than SR-ARQ.
{"title":"An efficient new ARQ strategy for vector symbol decoding with performance in power line communications","authors":"Narathep Sakunnithimetha, U. Tuntoolavest","doi":"10.1109/IEECON.2017.8075831","DOIUrl":"https://doi.org/10.1109/IEECON.2017.8075831","url":null,"abstract":"A new ARQ strategy is proposed for nonbinary convolutional codes with Vector symbol decoder (VSD). With one code word for each frame, VSD-ARQ is more efficient than the selective repeat (SR-ARQ) in terms of retransmission data length. VSD can report when it cannot decode and where the erroneous symbols start. For the (63,51) RS inner-(3,2,2) convolutional outer code and 51-symbol code word, VSD-ARQ saves up to 72.03 % of the retransmission data compared to SR-ARQ for NB-PLC and up to 73.01% for BB-PLC at SNR 26 dB. Shorter code words have a better probability of decoding failure without ARQ. However, with VSD-ARQ, they save less than the longer code words and have a lower code rate. VSD-ARQ uses less buffer than SR-ARQ.","PeriodicalId":196081,"journal":{"name":"2017 International Electrical Engineering Congress (iEECON)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123963591","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 : 2017-03-01DOI: 10.1109/IEECON.2017.8075854
P. Jamjareegulgarn, P. Supnithi, K. Hozumi, T. Tsugawa
This paper proposes two new equations for computing the bottomside thickness parameter of the NeQuick 2 model with a correction factor (B2bot_Pro2) and the simulated TEC values (TEC_Pro). The main contributions of this work are twofold, i.e., 1) the proposed B2bot_Pro2 equation can be used to compute the bottomside thickness whose trends and values are close to ones of the observed B0 (B0_obs) obtains from DPS-4 (Digisonde) and 2) the computed B2bot_Pro2 are used to compute the TEC values without additional TEC observation by any devices and TEC computation. In this case, it is useful for some locations where there exist only ground-based ionosonde without TEC observation or TEC measurement doesn't work in some situations. The results show that the B2bot_Pro2 have the same trends as the B0_obs. They are closer to the B0_obs, except at 13LT in June solstice and September equinox. The averages of absolute differences between B2bot_Pro2 and B0_obs (avAD_Pro2) are generally lower than about 8 km. They show that the B2bot_Pro2 are close to the B0_obs with the improved percentages of higher than 80%. The TEC computed using the B2bot_Pro2 equation (TEC_Pro) in the nighttime are generally close to the observed TEC (TEC_obs) compared with those in the daytime.
{"title":"A correction factor of bottomside thickness parameter for computing TEC in global navigation satellite systems","authors":"P. Jamjareegulgarn, P. Supnithi, K. Hozumi, T. Tsugawa","doi":"10.1109/IEECON.2017.8075854","DOIUrl":"https://doi.org/10.1109/IEECON.2017.8075854","url":null,"abstract":"This paper proposes two new equations for computing the bottomside thickness parameter of the NeQuick 2 model with a correction factor (B2bot_Pro2) and the simulated TEC values (TEC_Pro). The main contributions of this work are twofold, i.e., 1) the proposed B2bot_Pro2 equation can be used to compute the bottomside thickness whose trends and values are close to ones of the observed B0 (B0_obs) obtains from DPS-4 (Digisonde) and 2) the computed B2bot_Pro2 are used to compute the TEC values without additional TEC observation by any devices and TEC computation. In this case, it is useful for some locations where there exist only ground-based ionosonde without TEC observation or TEC measurement doesn't work in some situations. The results show that the B2bot_Pro2 have the same trends as the B0_obs. They are closer to the B0_obs, except at 13LT in June solstice and September equinox. The averages of absolute differences between B2bot_Pro2 and B0_obs (avAD_Pro2) are generally lower than about 8 km. They show that the B2bot_Pro2 are close to the B0_obs with the improved percentages of higher than 80%. The TEC computed using the B2bot_Pro2 equation (TEC_Pro) in the nighttime are generally close to the observed TEC (TEC_obs) compared with those in the daytime.","PeriodicalId":196081,"journal":{"name":"2017 International Electrical Engineering Congress (iEECON)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124450846","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 : 2017-03-01DOI: 10.1109/IEECON.2017.8075868
V. Patanavijit
In order to achieving a fine spatial image, which are algebraically manufactured from either single crude resolution image or many crude resolution images for executing by either computer vision algorithmic techniques or Digital Image Processing (DIP) algorithmic techniques, one of the most practical algorithmic techniques in the image enlargement operation is the Super Resolution Reconstruction (SRR), especially Single-Image Super-Resolution (SISR), which is established on the image enlargement algorithmic technique that can algebraically manufacture the fine spatial image from a single crude resolution image. In this paper, the image enlargement algorithmic technique established on SISR utilizing upper-band spectrum prognosis with an alternative regularized Andrew's Sine influence function due to the fact that this SISR algorithmic technique has great achievement and requires low computational time. Unfortunately, the classical regularized function C(x, y) in the upper-band prognosis process is algebraically build upon three adjusting parameters (b, h, k) thence the parameter adjustment is time consuming in order to bring its achievement maximum. Due to this obstacle, this article proposes an alternative regularized Andrew's Sine influence function, which is algebraically build upon only one parameter (T), contrary to three parameters like the classical regularized function C(x, y), for a simplex SISR utilizing upper-band spectrum prognosis. The simulated experimentation is analyzed on up to 14 classic images, which are tarnished by different noise category and the proposed simplex SISR algorithmic technique is proved to be dramatically low computation than the original SISR with identical achievement.
{"title":"A simplex SISR utilizing upper-band spectrum prognosis with an alternative regularized Andrew's sine influence function","authors":"V. Patanavijit","doi":"10.1109/IEECON.2017.8075868","DOIUrl":"https://doi.org/10.1109/IEECON.2017.8075868","url":null,"abstract":"In order to achieving a fine spatial image, which are algebraically manufactured from either single crude resolution image or many crude resolution images for executing by either computer vision algorithmic techniques or Digital Image Processing (DIP) algorithmic techniques, one of the most practical algorithmic techniques in the image enlargement operation is the Super Resolution Reconstruction (SRR), especially Single-Image Super-Resolution (SISR), which is established on the image enlargement algorithmic technique that can algebraically manufacture the fine spatial image from a single crude resolution image. In this paper, the image enlargement algorithmic technique established on SISR utilizing upper-band spectrum prognosis with an alternative regularized Andrew's Sine influence function due to the fact that this SISR algorithmic technique has great achievement and requires low computational time. Unfortunately, the classical regularized function C(x, y) in the upper-band prognosis process is algebraically build upon three adjusting parameters (b, h, k) thence the parameter adjustment is time consuming in order to bring its achievement maximum. Due to this obstacle, this article proposes an alternative regularized Andrew's Sine influence function, which is algebraically build upon only one parameter (T), contrary to three parameters like the classical regularized function C(x, y), for a simplex SISR utilizing upper-band spectrum prognosis. The simulated experimentation is analyzed on up to 14 classic images, which are tarnished by different noise category and the proposed simplex SISR algorithmic technique is proved to be dramatically low computation than the original SISR with identical achievement.","PeriodicalId":196081,"journal":{"name":"2017 International Electrical Engineering Congress (iEECON)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125644838","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 : 2017-03-01DOI: 10.1109/IEECON.2017.8075895
S. Harnsoongnoen, U. Charoen-In, A. Wanthong
This paper presents the design and characterization of a microwave biosensor based on a circular tapped split ring resonator (CT-SRR) coupled with a coplanar waveguide (CPW) transmission line to determine glucose concentration. An aqueous glucose solution was characterized for a concentration ranging from 0 to 0.20 g/mL with steps of 0.04 g/mL in the frequency range from 1.5 to 2.5 GHz. The notch amplitude transmission coefficient S21 values with a variation in the glucose concentration were detected and recorded. The transmission coefficient spectra, linearity and sensitivity of the sensor were analyzed. The results show that the CT-SRR coupled with a CPW transmission line is a good approach for glucose concentration monitoring.
{"title":"Determination of glucose concentration with resonant coplanar microwave sensor","authors":"S. Harnsoongnoen, U. Charoen-In, A. Wanthong","doi":"10.1109/IEECON.2017.8075895","DOIUrl":"https://doi.org/10.1109/IEECON.2017.8075895","url":null,"abstract":"This paper presents the design and characterization of a microwave biosensor based on a circular tapped split ring resonator (CT-SRR) coupled with a coplanar waveguide (CPW) transmission line to determine glucose concentration. An aqueous glucose solution was characterized for a concentration ranging from 0 to 0.20 g/mL with steps of 0.04 g/mL in the frequency range from 1.5 to 2.5 GHz. The notch amplitude transmission coefficient S21 values with a variation in the glucose concentration were detected and recorded. The transmission coefficient spectra, linearity and sensitivity of the sensor were analyzed. The results show that the CT-SRR coupled with a CPW transmission line is a good approach for glucose concentration monitoring.","PeriodicalId":196081,"journal":{"name":"2017 International Electrical Engineering Congress (iEECON)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115814040","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 : 2017-03-01DOI: 10.1109/IEECON.2017.8075782
S. Khwan-on, Kaugoon Kongkanjana
This paper proposes the control strategy of a multi-input boost converter for renewable energy system applications. The desired high output voltage with a constant level can be achieved using the multi-input boost converter. The low multi-input voltage sources are generated from renewable energy sources such as PV modules and wind turbines. The control of the multi-input boost converter is based on the PI controller consisting of the outer-loop voltage control and the multi-inner loop current control. The effectiveness of the designed controller to regulate the output voltage of the multi-input boost converter are demonstrated by simulation results under different operating conditions.
{"title":"The control of a multi-input boost converter for renewable energy system applications","authors":"S. Khwan-on, Kaugoon Kongkanjana","doi":"10.1109/IEECON.2017.8075782","DOIUrl":"https://doi.org/10.1109/IEECON.2017.8075782","url":null,"abstract":"This paper proposes the control strategy of a multi-input boost converter for renewable energy system applications. The desired high output voltage with a constant level can be achieved using the multi-input boost converter. The low multi-input voltage sources are generated from renewable energy sources such as PV modules and wind turbines. The control of the multi-input boost converter is based on the PI controller consisting of the outer-loop voltage control and the multi-inner loop current control. The effectiveness of the designed controller to regulate the output voltage of the multi-input boost converter are demonstrated by simulation results under different operating conditions.","PeriodicalId":196081,"journal":{"name":"2017 International Electrical Engineering Congress (iEECON)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129403982","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 : 2017-03-01DOI: 10.1109/IEECON.2017.8075825
C. Saetiaw, Saksit Summart, C. Thongsopa
This paper presents an optimal design of strip folded dipole antenna with a stacking technique to stabilize the resonance frequency. The designed double-layer strip folded dipole antenna worked well with the cylindrically curved surface on the human body. While being bent, the antenna will change the extended length in each layer within the stacking flexible copper-clad laminate. In this case, the properties of the antenna will be automatically adjusted. However, the extended length can occur at the contact point in each layer. So, we can choose between two points and four points by selecting different types of the designs. This reason, the performance of the extended length can be added by two and four when being compared to the previous multilayer design and the total layer of the new antenna was only two. The extended length of the antenna resulted in making antenna resonance frequency improvement become more stable. The contribution of proposed antenna was used only two layers of flexible copper-clad laminate that reduces a number of antenna's layers with a folded dipole antenna, which causes the designed less complicated, and the flexibility is advantageous for WBAN applications. The double-layer strip folded dipole antenna is designed for 2.45GHz WBAN application.
{"title":"Curved double-layer strip folded dipole antenna for WBAN applications","authors":"C. Saetiaw, Saksit Summart, C. Thongsopa","doi":"10.1109/IEECON.2017.8075825","DOIUrl":"https://doi.org/10.1109/IEECON.2017.8075825","url":null,"abstract":"This paper presents an optimal design of strip folded dipole antenna with a stacking technique to stabilize the resonance frequency. The designed double-layer strip folded dipole antenna worked well with the cylindrically curved surface on the human body. While being bent, the antenna will change the extended length in each layer within the stacking flexible copper-clad laminate. In this case, the properties of the antenna will be automatically adjusted. However, the extended length can occur at the contact point in each layer. So, we can choose between two points and four points by selecting different types of the designs. This reason, the performance of the extended length can be added by two and four when being compared to the previous multilayer design and the total layer of the new antenna was only two. The extended length of the antenna resulted in making antenna resonance frequency improvement become more stable. The contribution of proposed antenna was used only two layers of flexible copper-clad laminate that reduces a number of antenna's layers with a folded dipole antenna, which causes the designed less complicated, and the flexibility is advantageous for WBAN applications. The double-layer strip folded dipole antenna is designed for 2.45GHz WBAN application.","PeriodicalId":196081,"journal":{"name":"2017 International Electrical Engineering Congress (iEECON)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124315648","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 : 2017-03-01DOI: 10.1109/IEECON.2017.8075901
I. Chaisayun
A simple square-rooting circuit based on available operational amplifiers (op-amps) and available CMOS transistor arrays (CD4007) is proposed in this paper. This circuit has simple structure. It consists of two NMOS transistors and three op-amps. The output voltage of circuit can be either positive or negative by setting gain which can be easily adjusted by varying the resistors. Experimental results by using CD 4007 and μa741 are given to verify the operation.
{"title":"A simple and low cost square-rooting circuit employing commercial devices","authors":"I. Chaisayun","doi":"10.1109/IEECON.2017.8075901","DOIUrl":"https://doi.org/10.1109/IEECON.2017.8075901","url":null,"abstract":"A simple square-rooting circuit based on available operational amplifiers (op-amps) and available CMOS transistor arrays (CD4007) is proposed in this paper. This circuit has simple structure. It consists of two NMOS transistors and three op-amps. The output voltage of circuit can be either positive or negative by setting gain which can be easily adjusted by varying the resistors. Experimental results by using CD 4007 and μa741 are given to verify the operation.","PeriodicalId":196081,"journal":{"name":"2017 International Electrical Engineering Congress (iEECON)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114467112","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 : 2017-03-01DOI: 10.1109/IEECON.2017.8075778
Joachim J. Mwambeleko, T. Kulworawanichpong
An electric train is currently one of the best solutions to urban passenger mobility challenges. However, diesel powered trains are still common in low capacity lines on which the density of traffic is insufficient to justify the high fixed cost of railway electrification. In such cases, battery driven trams present an alternative that some railway operators have been opting for. Since rail vehicles are heavy, a high capacity, high voltage traction battery will be required to provide accelerating power. To minimize the peak power that a traction battery has to supply and subsequently the required battery size, this paper presents a battery-catenary hybrid tram system in which a tram accelerates from a station under a 200-meter-long catenary and cruises with traction battery. The tram was modelled and simulated in MATLAB. The traction battery peak power was reduced from 300 kW to 100 kW. This means a significant reduction in the required battery size with just a short catenary. Suggested applications of such a system are, on shuttle lines with few stops and in countries or regions where full railway electrification would mean dominance of diesel trains.
{"title":"Battery and accelerating-catenary hybrid system for light rail vehicles and trams","authors":"Joachim J. Mwambeleko, T. Kulworawanichpong","doi":"10.1109/IEECON.2017.8075778","DOIUrl":"https://doi.org/10.1109/IEECON.2017.8075778","url":null,"abstract":"An electric train is currently one of the best solutions to urban passenger mobility challenges. However, diesel powered trains are still common in low capacity lines on which the density of traffic is insufficient to justify the high fixed cost of railway electrification. In such cases, battery driven trams present an alternative that some railway operators have been opting for. Since rail vehicles are heavy, a high capacity, high voltage traction battery will be required to provide accelerating power. To minimize the peak power that a traction battery has to supply and subsequently the required battery size, this paper presents a battery-catenary hybrid tram system in which a tram accelerates from a station under a 200-meter-long catenary and cruises with traction battery. The tram was modelled and simulated in MATLAB. The traction battery peak power was reduced from 300 kW to 100 kW. This means a significant reduction in the required battery size with just a short catenary. Suggested applications of such a system are, on shuttle lines with few stops and in countries or regions where full railway electrification would mean dominance of diesel trains.","PeriodicalId":196081,"journal":{"name":"2017 International Electrical Engineering Congress (iEECON)","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116043258","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 : 2017-03-01DOI: 10.1109/IEECON.2017.8075774
W. Jamratnaw
This paper focused on the investigation of factors affecting the evacuated vacuum tubes performance under condition that the input energy was the incident solar radiation and the hot water's temperature was the output energy. The results showed that the hot water's temperature correlated linearly with the total cumulative incident solar radiation, with a coefficient of determination of 0.99, indicating a very linear relationship. It is possible to predict the volume and temperature of hot water from the total cumulative incident solar radiation, which had been recorded by the Department of Alternative Energy Development and Efficiency.
{"title":"Efficiency of thermal energy with evacuated vacuum tubes","authors":"W. Jamratnaw","doi":"10.1109/IEECON.2017.8075774","DOIUrl":"https://doi.org/10.1109/IEECON.2017.8075774","url":null,"abstract":"This paper focused on the investigation of factors affecting the evacuated vacuum tubes performance under condition that the input energy was the incident solar radiation and the hot water's temperature was the output energy. The results showed that the hot water's temperature correlated linearly with the total cumulative incident solar radiation, with a coefficient of determination of 0.99, indicating a very linear relationship. It is possible to predict the volume and temperature of hot water from the total cumulative incident solar radiation, which had been recorded by the Department of Alternative Energy Development and Efficiency.","PeriodicalId":196081,"journal":{"name":"2017 International Electrical Engineering Congress (iEECON)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123921449","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 : 2017-03-01DOI: 10.1109/IEECON.2017.8075873
Taweechai Ouypornkochagorn
One of auxiliary processes to obtain the optimal solution of an inverse problem is to use guaranteeing convergence strategy. Line-search strategy is the oldest and the most widely used one. However, line-search strategy is not suitable in some situations, in particular, in nonlinear situations where many local minima are present. Seeking an optimal solution for head tissue conductivities estimation with electrical impedance tomography (EIT) technique is a kind of such situation. Noise and modeling error also are crucial factors to determine the accuracy and the reliability of the estimation, and, many times, the line-search strategy cannot deal with. In this work, a novel guaranteeing convergence strategy is proposed by restricting the change of estimates during the iterative process of the estimation. Respecting the simulation result, the novel strategy employment shows the improvement of reliability and local minima avoidance even working in a high-degree nonlinear situation.
{"title":"A novel strategy to guarantee convergence by avoiding divergence in estimation process for evaluating head tissue conductivities","authors":"Taweechai Ouypornkochagorn","doi":"10.1109/IEECON.2017.8075873","DOIUrl":"https://doi.org/10.1109/IEECON.2017.8075873","url":null,"abstract":"One of auxiliary processes to obtain the optimal solution of an inverse problem is to use guaranteeing convergence strategy. Line-search strategy is the oldest and the most widely used one. However, line-search strategy is not suitable in some situations, in particular, in nonlinear situations where many local minima are present. Seeking an optimal solution for head tissue conductivities estimation with electrical impedance tomography (EIT) technique is a kind of such situation. Noise and modeling error also are crucial factors to determine the accuracy and the reliability of the estimation, and, many times, the line-search strategy cannot deal with. In this work, a novel guaranteeing convergence strategy is proposed by restricting the change of estimates during the iterative process of the estimation. Respecting the simulation result, the novel strategy employment shows the improvement of reliability and local minima avoidance even working in a high-degree nonlinear situation.","PeriodicalId":196081,"journal":{"name":"2017 International Electrical Engineering Congress (iEECON)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128420487","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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