Pub Date : 2023-10-09DOI: 10.24200/sci.2023.60957.7075
Imtiaz Ahmed, Shahid Hameed, Aamar Abbasi, Sami Ullah Khan, Waseh Farooq, Mohammed A. Almeshaal, Muapper Alhadri, Lioua Kolsi
Owing to enhanced thermal mechanism of nanomaterials, the researchers are continuously exploring the novel features of nanofluids and claiming multidisciplinary applications in solar systems, engineering processes, energy devices and automobile industries. The experimentally supported research proves that with interaction of different types of nanoparticles is more effective to enhance the thermal transportation phenomenon. Following such motivations in mind, the aim of present continuation is exploring the thermal impact of modified hybrid nanofluid model in complex vertical channel. Due to high thermal performances, copper (CuO), copper oxide (CuO) and aluminium oxide (Al_2 O_3) nanoparticles explore the thermal behavior of modified hybrid nanofluid model. The vertical channel confined the sinusoidal waves on walls. The flow phenomenon is based on peristaltic transport associated to the human body system. The consideration of small Reynolds number hypothesis and larger wavelength approach, the implication of problem has been done. The modeled equations are tackled with shooting technique. Various stream functions with applications of peristaltic transport phenomenon are developed. It is observed that heat transfer is larger in the curved channel as compared to the straight channel. The decomposition of modified hybrid nanoparticles is more effective to improve the heat transfer pattern more effectively.
{"title":"Computation insight of modified thermal distribution of hybrid nanofluids in complex wavy channel: A comparative thermal approach for different nanofluid models","authors":"Imtiaz Ahmed, Shahid Hameed, Aamar Abbasi, Sami Ullah Khan, Waseh Farooq, Mohammed A. Almeshaal, Muapper Alhadri, Lioua Kolsi","doi":"10.24200/sci.2023.60957.7075","DOIUrl":"https://doi.org/10.24200/sci.2023.60957.7075","url":null,"abstract":"Owing to enhanced thermal mechanism of nanomaterials, the researchers are continuously exploring the novel features of nanofluids and claiming multidisciplinary applications in solar systems, engineering processes, energy devices and automobile industries. The experimentally supported research proves that with interaction of different types of nanoparticles is more effective to enhance the thermal transportation phenomenon. Following such motivations in mind, the aim of present continuation is exploring the thermal impact of modified hybrid nanofluid model in complex vertical channel. Due to high thermal performances, copper (CuO), copper oxide (CuO) and aluminium oxide (Al_2 O_3) nanoparticles explore the thermal behavior of modified hybrid nanofluid model. The vertical channel confined the sinusoidal waves on walls. The flow phenomenon is based on peristaltic transport associated to the human body system. The consideration of small Reynolds number hypothesis and larger wavelength approach, the implication of problem has been done. The modeled equations are tackled with shooting technique. Various stream functions with applications of peristaltic transport phenomenon are developed. It is observed that heat transfer is larger in the curved channel as compared to the straight channel. The decomposition of modified hybrid nanoparticles is more effective to improve the heat transfer pattern more effectively.","PeriodicalId":21605,"journal":{"name":"Scientia Iranica","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135149695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-09DOI: 10.24200/sci.2023.62909.8100
Reza Heibati, Ramin Alipour-Sarabi, Seyed Mohammad Taghi Bathaee
The generation of electrical power through wind turbines has significantly increased nowadays. However, these systems are prone to faults that can disrupt the network and incur substantial costs for the generation units. Therefore, effective maintenance scheduling becomes crucial. A major challenge faced by wind turbines is their maintenance requirements, as any interruption in their operation and power generation can result in significant economic losses. Consequently, meticulous planning is indispensable to minimize such consequences. This paper that is the first part of the study conducts a survey of data acquisition methods in condition monitoring of wind turbines. In the second part, signal processing techniques for condition monitoring of wind turbines are presented. Furthermore, the paper examines a range of studies that have implemented practical condition monitoring methods in wind turbines, delving into the associated challenges and proposing potential solutions. Various methods such as vibration analysis, acoustic analysis, electrical parameter analysis, AI-based techniques, and fault-tolerant control have been employed for wind turbine maintenance. However, limitations exist in terms of data availability and computational burden. Future challenges include developing algorithms that require less data, reducing computational requirements, updating models with new conditions, enabling early detection and proactive maintenance, and reducing maintenance costs.
{"title":"A survey on data acquisition methods in conditional monitoring of wind turbines","authors":"Reza Heibati, Ramin Alipour-Sarabi, Seyed Mohammad Taghi Bathaee","doi":"10.24200/sci.2023.62909.8100","DOIUrl":"https://doi.org/10.24200/sci.2023.62909.8100","url":null,"abstract":"The generation of electrical power through wind turbines has significantly increased nowadays. However, these systems are prone to faults that can disrupt the network and incur substantial costs for the generation units. Therefore, effective maintenance scheduling becomes crucial. A major challenge faced by wind turbines is their maintenance requirements, as any interruption in their operation and power generation can result in significant economic losses. Consequently, meticulous planning is indispensable to minimize such consequences. This paper that is the first part of the study conducts a survey of data acquisition methods in condition monitoring of wind turbines. In the second part, signal processing techniques for condition monitoring of wind turbines are presented. Furthermore, the paper examines a range of studies that have implemented practical condition monitoring methods in wind turbines, delving into the associated challenges and proposing potential solutions. Various methods such as vibration analysis, acoustic analysis, electrical parameter analysis, AI-based techniques, and fault-tolerant control have been employed for wind turbine maintenance. However, limitations exist in terms of data availability and computational burden. Future challenges include developing algorithms that require less data, reducing computational requirements, updating models with new conditions, enabling early detection and proactive maintenance, and reducing maintenance costs.","PeriodicalId":21605,"journal":{"name":"Scientia Iranica","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135149552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-09DOI: 10.24200/sci.2023.60817.7002
Ali Namaei-kohal, Alireza Ardakani, Mahmoud Hassanlourad
As a geocell reinforced structure can be subjected to earthquake and pullout loads during its life time, it is obligatory to assess the pullout capacity and soil-geosynthetic interaction of geocell under cyclic loads. This research investigated the cyclic and post-cyclic pullout behavior of geocell in cohesionless soil using a series of 24 multi-stage pullout tests. The results indicated that the ultimate post-cyclic pullout load was less than the monotonic pullout load. This was the result of a reciprocating motion from loading caused by the interlock between the geocell infill soil and the surrounding material, which weakened and broke during the cyclic phase. It was found that, as the grain size of the soil increased, the interlocking strength increased and consequently the ultimate post cyclic pullout load increased. The soil particle size had a significant effect on the cumulative displacement during the cyclic phase. Furthermore, the increases in the loading amplitude and the number of cycles decreased the interlocking resistance of the infill soil with the surrounding material, which decreased the ultimate post-cyclic pullout load. The effect of the loading frequency likely depended on the geocell infill soil density.
{"title":"Cyclic and post-cyclic geocell pullout behavior in cohesionless soil","authors":"Ali Namaei-kohal, Alireza Ardakani, Mahmoud Hassanlourad","doi":"10.24200/sci.2023.60817.7002","DOIUrl":"https://doi.org/10.24200/sci.2023.60817.7002","url":null,"abstract":"As a geocell reinforced structure can be subjected to earthquake and pullout loads during its life time, it is obligatory to assess the pullout capacity and soil-geosynthetic interaction of geocell under cyclic loads. This research investigated the cyclic and post-cyclic pullout behavior of geocell in cohesionless soil using a series of 24 multi-stage pullout tests. The results indicated that the ultimate post-cyclic pullout load was less than the monotonic pullout load. This was the result of a reciprocating motion from loading caused by the interlock between the geocell infill soil and the surrounding material, which weakened and broke during the cyclic phase. It was found that, as the grain size of the soil increased, the interlocking strength increased and consequently the ultimate post cyclic pullout load increased. The soil particle size had a significant effect on the cumulative displacement during the cyclic phase. Furthermore, the increases in the loading amplitude and the number of cycles decreased the interlocking resistance of the infill soil with the surrounding material, which decreased the ultimate post-cyclic pullout load. The effect of the loading frequency likely depended on the geocell infill soil density.","PeriodicalId":21605,"journal":{"name":"Scientia Iranica","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135149545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-09DOI: 10.24200/sci.2023.61387.7283
Preethi Sharma K., Vijayakumar T.
A high-end autonomous vehicle is expected to have at least a hundred different electronic subsystems. Each one of them takes power from the battery through Power Management Unit (PMU). Having an efficient PMU is crucial and is expected to supply the required level of uninterrupted power. PMU consists of several buck converters which translate a higher voltage level to required lower voltage levels. A PMU is more reliable if it consists efficient and well-structured voltage converters. In this paper, a fault-tolerant buck converter is designed which outputs 3.3 volts. A simple yet effective technique is proposed to design a fault-tolerant buck DC-DC converter by bypassing the faulty converter leg. The proposed system utilizes a signal processing-based method for fault detection. The secondary converter is activated only upon the confirmed prognosis of a faulty primary converter. Ripple content in the output Aluminum Electrolytic Capacitor (AEC) voltage is monitored and used as a primary health indicator for the converter. An experimental setup is built and tested in the laboratory. Experimental results indicate a smooth transition from the primary converter to the secondary demonstrating an uninterrupted power supply along with the simplicity and effectiveness of the proposed solution.
{"title":"A Fault-Tolerant DC-DC Buck Converter with Zero Interruption Time for Autonomous Vehicles","authors":"Preethi Sharma K., Vijayakumar T.","doi":"10.24200/sci.2023.61387.7283","DOIUrl":"https://doi.org/10.24200/sci.2023.61387.7283","url":null,"abstract":"A high-end autonomous vehicle is expected to have at least a hundred different electronic subsystems. Each one of them takes power from the battery through Power Management Unit (PMU). Having an efficient PMU is crucial and is expected to supply the required level of uninterrupted power. PMU consists of several buck converters which translate a higher voltage level to required lower voltage levels. A PMU is more reliable if it consists efficient and well-structured voltage converters. In this paper, a fault-tolerant buck converter is designed which outputs 3.3 volts. A simple yet effective technique is proposed to design a fault-tolerant buck DC-DC converter by bypassing the faulty converter leg. The proposed system utilizes a signal processing-based method for fault detection. The secondary converter is activated only upon the confirmed prognosis of a faulty primary converter. Ripple content in the output Aluminum Electrolytic Capacitor (AEC) voltage is monitored and used as a primary health indicator for the converter. An experimental setup is built and tested in the laboratory. Experimental results indicate a smooth transition from the primary converter to the secondary demonstrating an uninterrupted power supply along with the simplicity and effectiveness of the proposed solution.","PeriodicalId":21605,"journal":{"name":"Scientia Iranica","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135148980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-09DOI: 10.24200/sci.2023.61419.7295
Deo Chandra Jaiswal, S. K. Sriwas, Abhishek Nigam, Siddharth Srivastava, Mahendra Kumar
In the present time, mobile communication is essential for the daily life of human beings and for that modulation schemes are very important for the quality and speed of transmission. Orthogonal frequency division multiplexing (OFDM) is one of the best schemes for mobile communication. In this study, we focused to reduce the PAPR using a novel algorithm using the OFDM system. To reduce the PAPR, the Partial transmit sequence (PTS) has been proposed in this study and simulated with different modulation techniques. The main parameter for OFDM is peak-to-average power ratio (PAPR) because it is high which is not desirable for the transmission system. This parameter has been further minimized in low complexity conditions in PTS that include the binary phase-shift keying (BPSK), quadrature phase-shift keying (QPSK), and quadrature amplitude modulation (QAM) modulation scheme. The obtained simulated results show clearly that among various modulation techniques, the BPSK is the optimum technique for proposed algorithm to reduce the PAPR.
{"title":"Novel Algorithm to minimize PAPR of OFDM system with Less Intricacy PTS using Various Modulation Schemes","authors":"Deo Chandra Jaiswal, S. K. Sriwas, Abhishek Nigam, Siddharth Srivastava, Mahendra Kumar","doi":"10.24200/sci.2023.61419.7295","DOIUrl":"https://doi.org/10.24200/sci.2023.61419.7295","url":null,"abstract":"In the present time, mobile communication is essential for the daily life of human beings and for that modulation schemes are very important for the quality and speed of transmission. Orthogonal frequency division multiplexing (OFDM) is one of the best schemes for mobile communication. In this study, we focused to reduce the PAPR using a novel algorithm using the OFDM system. To reduce the PAPR, the Partial transmit sequence (PTS) has been proposed in this study and simulated with different modulation techniques. The main parameter for OFDM is peak-to-average power ratio (PAPR) because it is high which is not desirable for the transmission system. This parameter has been further minimized in low complexity conditions in PTS that include the binary phase-shift keying (BPSK), quadrature phase-shift keying (QPSK), and quadrature amplitude modulation (QAM) modulation scheme. The obtained simulated results show clearly that among various modulation techniques, the BPSK is the optimum technique for proposed algorithm to reduce the PAPR.","PeriodicalId":21605,"journal":{"name":"Scientia Iranica","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135149383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-09DOI: 10.24200/sci.2023.61323.7250
Alireza Rabani mehr, Hasan Nikkhah, Mehrdad Farhadian
Sequencing batch reactor (SBR), modified Ludzak Ettinger (MLE), and anaerobic/anoxic/aerobic (A2O), were modeled and simulated using the data of the Konarak-Iran wastewater treatment plant. GPS-X and CapdetWorks software were used for technical and economic evaluation, respectively. The cost of MLE treatment per cubic meter of effluent with a flow rate of 900 cubic meters per day was $ 0.96 per cubic meter, which was 36.4% and 12.5% lower than SBR and A2O, respectively. The removal efficiency of pollutants using the A2O method was above 90%, which has the best efficiency compared to the other two methods. However, since the quality of the effluent is also met by the MLE method, the choice of the same method can be desirable. Therefore, modeling and technical and economic simulation of wastewater treatment to perform comparisons between different methods lead to better engineering decisions based on the cost and quality of effluent.
{"title":"Techno-economic analysis of a municipal wastewater treatment plant: A comparison among SBR, MLE & A2O Processes","authors":"Alireza Rabani mehr, Hasan Nikkhah, Mehrdad Farhadian","doi":"10.24200/sci.2023.61323.7250","DOIUrl":"https://doi.org/10.24200/sci.2023.61323.7250","url":null,"abstract":"Sequencing batch reactor (SBR), modified Ludzak Ettinger (MLE), and anaerobic/anoxic/aerobic (A2O), were modeled and simulated using the data of the Konarak-Iran wastewater treatment plant. GPS-X and CapdetWorks software were used for technical and economic evaluation, respectively. The cost of MLE treatment per cubic meter of effluent with a flow rate of 900 cubic meters per day was $ 0.96 per cubic meter, which was 36.4% and 12.5% lower than SBR and A2O, respectively. The removal efficiency of pollutants using the A2O method was above 90%, which has the best efficiency compared to the other two methods. However, since the quality of the effluent is also met by the MLE method, the choice of the same method can be desirable. Therefore, modeling and technical and economic simulation of wastewater treatment to perform comparisons between different methods lead to better engineering decisions based on the cost and quality of effluent.","PeriodicalId":21605,"journal":{"name":"Scientia Iranica","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135149544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-04DOI: 10.24200/sci.2023.62359.7794
Rameshbabu Ramar, Sundarapandian Vaidyanathan
In this paper, a new chaotic system with three sinusoidal nonlinearitiesis reported. The basic behavior of the new chaotic system is analyzed bymeans of equilibrium points, stability and Lyapunov exponents. The newsystem has countably infinite number of equilibrium points, which is anovel feature of the system. The new system has multiple interestingfeatures such as topologically different attractors, coexisting attractors,offset boosted attractors and polarity reversed offset boosting attractors.These special features are analyzed and verified using classical tools suchas bifurcation diagrams, Lyapunov exponent plots and attractor diagrams.The bifurcation analysis and simulation results show that the proposedsystem has rich chaotic dynamics. Furthermore, the adaptive control andsynchronization of the new system are achieved using nonlinear feedbackcontrol methodology. MATLAB plots are shown to illustrate the controlresults for the new chaotic system with three sinusoidal nonlinearities
{"title":"A New DC Offset Boostable Chaotic System with Multistability, Coexisting Attractors and Its Adaptive Synchronization","authors":"Rameshbabu Ramar, Sundarapandian Vaidyanathan","doi":"10.24200/sci.2023.62359.7794","DOIUrl":"https://doi.org/10.24200/sci.2023.62359.7794","url":null,"abstract":"In this paper, a new chaotic system with three sinusoidal nonlinearitiesis reported. The basic behavior of the new chaotic system is analyzed bymeans of equilibrium points, stability and Lyapunov exponents. The newsystem has countably infinite number of equilibrium points, which is anovel feature of the system. The new system has multiple interestingfeatures such as topologically different attractors, coexisting attractors,offset boosted attractors and polarity reversed offset boosting attractors.These special features are analyzed and verified using classical tools suchas bifurcation diagrams, Lyapunov exponent plots and attractor diagrams.The bifurcation analysis and simulation results show that the proposedsystem has rich chaotic dynamics. Furthermore, the adaptive control andsynchronization of the new system are achieved using nonlinear feedbackcontrol methodology. MATLAB plots are shown to illustrate the controlresults for the new chaotic system with three sinusoidal nonlinearities","PeriodicalId":21605,"journal":{"name":"Scientia Iranica","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135647142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-04DOI: 10.24200/sci.2023.62258.7738
Hossein Tavakoli, Mohammad Shams Esfand Abadi
This paper presents a new spline adaptive filtering (SAF) algorithm based on signed regressor (SR) of input signal. The algorithm is called SR-SAF normalized least mean squares (SR-SAF-NLMS). The SR-SAF-NLMS is established through $L_{1}$-norm constraint to the proposed cost function. In this algorithm, the polarity of the input signal is used to adjust the weight coefficients and control point vectors. Therefore, the computational complexity, especially the number of multiplications, is significantly reduced. Furthermore, the performance of the SR-SAF-NLMS is close to the conventional SAF-NLMS. The good performance of the proposed algorithm is demonstrated through several simulation results in different scenarios.
{"title":"Spline NLMS Adaptive Filter Algorithm based on the Signed Regressor of Input Signal","authors":"Hossein Tavakoli, Mohammad Shams Esfand Abadi","doi":"10.24200/sci.2023.62258.7738","DOIUrl":"https://doi.org/10.24200/sci.2023.62258.7738","url":null,"abstract":"This paper presents a new spline adaptive filtering (SAF) algorithm based on signed regressor (SR) of input signal. The algorithm is called SR-SAF normalized least mean squares (SR-SAF-NLMS). The SR-SAF-NLMS is established through $L_{1}$-norm constraint to the proposed cost function. In this algorithm, the polarity of the input signal is used to adjust the weight coefficients and control point vectors. Therefore, the computational complexity, especially the number of multiplications, is significantly reduced. Furthermore, the performance of the SR-SAF-NLMS is close to the conventional SAF-NLMS. The good performance of the proposed algorithm is demonstrated through several simulation results in different scenarios.","PeriodicalId":21605,"journal":{"name":"Scientia Iranica","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135647148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-04DOI: 10.24200/sci.2023.61263.7229
Mahnaz Ebrahimi-Sadrabadi, Bakhtiar Ostadi, Ali Husseinzadeh Kashan, Mohammad Mehdi Sepehri
In recent high-risk and changing world, optimal resource allocation is significant, which in case of inappropriate resource allocation, will cause significant damage to organizations. In resource allocation and where there is a lack of resources, it is imperative to processes continue and the process's resilience and the risks posed by these lack and unsuitable allocations. If resource allocation is not done properly or is done in short supply, there will be consequences, e.g., processes do not continue properly or are not resilient, or they will be increase in the risks of the processes. So, addressing the three mentioned issues such as organizational resilience, business continuity, and risks of the operational processes is of great importance in the problem of resource allocation. Also, the lack of integrated attention to the mentioned issues in the modeling of resource allocation in order to process optimization will lead to a decrease in resources’ utilization. Therefore, in this paper, a novel integrated mathematical model has been developed for resource allocation with considering the process resilience and continuity. Thus, the objective functions of the model are defined according to the four measures of optimal resource allocation such as return, risk, resilience and process continuity.
{"title":"A risk-return based mathematical model for resource allocation with considering the process resilience and continuity","authors":"Mahnaz Ebrahimi-Sadrabadi, Bakhtiar Ostadi, Ali Husseinzadeh Kashan, Mohammad Mehdi Sepehri","doi":"10.24200/sci.2023.61263.7229","DOIUrl":"https://doi.org/10.24200/sci.2023.61263.7229","url":null,"abstract":"In recent high-risk and changing world, optimal resource allocation is significant, which in case of inappropriate resource allocation, will cause significant damage to organizations. In resource allocation and where there is a lack of resources, it is imperative to processes continue and the process's resilience and the risks posed by these lack and unsuitable allocations. If resource allocation is not done properly or is done in short supply, there will be consequences, e.g., processes do not continue properly or are not resilient, or they will be increase in the risks of the processes. So, addressing the three mentioned issues such as organizational resilience, business continuity, and risks of the operational processes is of great importance in the problem of resource allocation. Also, the lack of integrated attention to the mentioned issues in the modeling of resource allocation in order to process optimization will lead to a decrease in resources’ utilization. Therefore, in this paper, a novel integrated mathematical model has been developed for resource allocation with considering the process resilience and continuity. Thus, the objective functions of the model are defined according to the four measures of optimal resource allocation such as return, risk, resilience and process continuity.","PeriodicalId":21605,"journal":{"name":"Scientia Iranica","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135646960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-01DOI: 10.24200/sci.2023.60769.6979
M. Spertip, F. Karbalaei, A. Yazdaninejadi
Conservation voltage reduction (CVR) as a readily available technology can easily tackle line congestion besides meeting the energy conservation by a marginal reduction in the voltages of user-end nodes. Although CVR can help to yield clean and sustainable electrifications, application of this technology is limited owing to some unclear technical aspects such as response to industrial loads, load modeling type, and load estimation error. This paper aims at presenting a comprehensive analysis of the CVR process to shed light on the various aspects of this technology for operators who seek to implement it. To this end, CVR process is explored based on load composition on a typical feeder with three zones. Different sizes for active and reactive powers in consumers of those zones are taken into consideration. By doing so, not only CVR process with different load arrangements is explored but also effect of the dominant loads on feeders is unveiled. This study also deals with identifying which load modeling type show better robustness to modeling errors. Moreover, CVR process in the pointed cases are performed with a considerable error on the parameters of load models. The obtained results show that in spite of expectations, CVR may have different outputs.
{"title":"Conservation Voltage Reduction Technology Yields Sustainable Electrifications: An Exploratory Study on Implementation Capability","authors":"M. Spertip, F. Karbalaei, A. Yazdaninejadi","doi":"10.24200/sci.2023.60769.6979","DOIUrl":"https://doi.org/10.24200/sci.2023.60769.6979","url":null,"abstract":"Conservation voltage reduction (CVR) as a readily available technology can easily tackle line congestion besides meeting the energy conservation by a marginal reduction in the voltages of user-end nodes. Although CVR can help to yield clean and sustainable electrifications, application of this technology is limited owing to some unclear technical aspects such as response to industrial loads, load modeling type, and load estimation error. This paper aims at presenting a comprehensive analysis of the CVR process to shed light on the various aspects of this technology for operators who seek to implement it. To this end, CVR process is explored based on load composition on a typical feeder with three zones. Different sizes for active and reactive powers in consumers of those zones are taken into consideration. By doing so, not only CVR process with different load arrangements is explored but also effect of the dominant loads on feeders is unveiled. This study also deals with identifying which load modeling type show better robustness to modeling errors. Moreover, CVR process in the pointed cases are performed with a considerable error on the parameters of load models. The obtained results show that in spite of expectations, CVR may have different outputs.","PeriodicalId":21605,"journal":{"name":"Scientia Iranica","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136059093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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