Soil-Moisture sensing has proven to be an important factor in decreasing the need for irrigation while maintaining crop yield and quality. Farmers’ finding ways to minimize water use is necessary given the world’s obvious climate change and, in some areas, the resulting onslaught of drought. As the world’s population grows and the demand for higher-quality food increases, precision irrigation becomes even more essential. As sensors are deployed, these have to be monitored in some way. Our project employs radio broadcasts over unlicensed frequencies to implement wireless remote sensing. Internet and cellular are alternative solutions. However, those require more than the acquisition and implementation of certain equipment and software. Those two approaches also involve third-party services, and their continuing fees. An additional assumption is that those services are available, cost effective, and reliable. Radio broadcast using the LoRa (Long Range) protocol is essentially a low-power means for implementing transceivers for low-rate data exchange. These are effective over longer ranges than technologies such as Bluetooth. LoRa is often deployed using LoRaWAN (LoRa for formal Wide Area Networks) but that involves additional equipment. This paper discusses a means of using only relatively low-cost hardware (Arduino-Uno microcontrollers with attached Dragino transceivers). A wireless network is formed upon which messages flow from sensors attached to microcontrollers, through relays (to account for terrain variability and other obstructions), to a receiver connected to some external system. The LoRa hardware unit remains consistent across all components, with only the installed software varying. Relays and receivers utilize their own unchanging software. However, the sensor units' baseline software is adapted based on the types and numbers of sensors attached. Each sensor, relay, and receiver has its own unique assigned network address. The authors have constructed and demonstrated a proof-of-concept of the ideas expressed in this paper. Discussion is offered on future work required as the project moves toward field application.
{"title":"LoRa flood messaging applied to remote soil-moisture monitoring","authors":"Raeth Peter, Branch Philip","doi":"10.5897/jece2022.0205","DOIUrl":"https://doi.org/10.5897/jece2022.0205","url":null,"abstract":"Soil-Moisture sensing has proven to be an important factor in decreasing the need for irrigation while maintaining crop yield and quality. Farmers’ finding ways to minimize water use is necessary given the world’s obvious climate change and, in some areas, the resulting onslaught of drought. As the world’s population grows and the demand for higher-quality food increases, precision irrigation becomes even more essential. As sensors are deployed, these have to be monitored in some way. Our project employs radio broadcasts over unlicensed frequencies to implement wireless remote sensing. Internet and cellular are alternative solutions. However, those require more than the acquisition and implementation of certain equipment and software. Those two approaches also involve third-party services, and their continuing fees. An additional assumption is that those services are available, cost effective, and reliable. Radio broadcast using the LoRa (Long Range) protocol is essentially a low-power means for implementing transceivers for low-rate data exchange. These are effective over longer ranges than technologies such as Bluetooth. LoRa is often deployed using LoRaWAN (LoRa for formal Wide Area Networks) but that involves additional equipment. This paper discusses a means of using only relatively low-cost hardware (Arduino-Uno microcontrollers with attached Dragino transceivers). A wireless network is formed upon which messages flow from sensors attached to microcontrollers, through relays (to account for terrain variability and other obstructions), to a receiver connected to some external system. The LoRa hardware unit remains consistent across all components, with only the installed software varying. Relays and receivers utilize their own unchanging software. However, the sensor units' baseline software is adapted based on the types and numbers of sensors attached. Each sensor, relay, and receiver has its own unique assigned network address. The authors have constructed and demonstrated a proof-of-concept of the ideas expressed in this paper. Discussion is offered on future work required as the project moves toward field application.","PeriodicalId":34329,"journal":{"name":"Journal of Electrical and Computer Engineering Innovations","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74934642","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}
Crop and irrigation modeling based on fundamental physics can be very valuable in forecasting requirements and production in preparation for next season's planting/harvesting cycle. AquaCrop is such a model. It forecasts daily watering needs and allows for simple through detailed data input. Its supplied input files offer configurations for various crop, soil, terrain, and irrigation types. If one knows historical weather, it is possible to estimate daily crop water needs in the coming season, assuming the weather of the coming season is similar to previous years. AquaCrop-OSPy is an open-source implementation of AquaCrop, created in cooperation with AquaCrop’s authors. Looking at this irrigation modeling tool from a computer engineering perspective, one begins to realize that AquaCrop-OSPy could be expanded to input real-time weather data and produce real-time signals to an irrigation system. A simple new console would show communication with the irrigation system. This paper discusses and illustrates a proof-of-concept for that possibility. The author started with basic software for querying up-to-date weather data and estimating ETo for a single crop under normal conditions. Those modules were coupled with a microcontroller to confirm what is possible. Those results encouraged an expansion to AquaCrop-OSPy so that it can be used to support fully-automated human-supervised irrigation. All software for this paper is available at https://github.com/SoothingMist/ Embeddable-Software-for-Irrigation-Control.
{"title":"Applying AquaCrop-OSPy to real-time irrigation","authors":"Peter G. Raeth","doi":"10.5897/jece2023.0206","DOIUrl":"https://doi.org/10.5897/jece2023.0206","url":null,"abstract":"Crop and irrigation modeling based on fundamental physics can be very valuable in forecasting requirements and production in preparation for next season's planting/harvesting cycle. AquaCrop is such a model. It forecasts daily watering needs and allows for simple through detailed data input. Its supplied input files offer configurations for various crop, soil, terrain, and irrigation types. If one knows historical weather, it is possible to estimate daily crop water needs in the coming season, assuming the weather of the coming season is similar to previous years. AquaCrop-OSPy is an open-source implementation of AquaCrop, created in cooperation with AquaCrop’s authors. Looking at this irrigation modeling tool from a computer engineering perspective, one begins to realize that AquaCrop-OSPy could be expanded to input real-time weather data and produce real-time signals to an irrigation system. A simple new console would show communication with the irrigation system. This paper discusses and illustrates a proof-of-concept for that possibility. The author started with basic software for querying up-to-date weather data and estimating ETo for a single crop under normal conditions. Those modules were coupled with a microcontroller to confirm what is possible. Those results encouraged an expansion to AquaCrop-OSPy so that it can be used to support fully-automated human-supervised irrigation. All software for this paper is available at https://github.com/SoothingMist/ Embeddable-Software-for-Irrigation-Control.","PeriodicalId":34329,"journal":{"name":"Journal of Electrical and Computer Engineering Innovations","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81274766","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}
The goal of this article is to demonstrate how smart contracts can be leveraged via blockchain technologies. This will enable us to create a bridge between management and the materials used in the construction industry. It is all too common for construction projects to encounter a number of problems along the way, including a lack of communication between builders, laborers, and vendors. As a result of these issues, the proposed timelines and quality of construction end up being compromised. Oftentimes, stakeholders involved in the project are not quite aware of the quality and quantity of materials that will be used to complete the project. It is precisely this problem that we aim to solve through the use of blockchain technology. As a result of the use of blockchain technology, smart contracts offer transparency and trust to their stakeholders. In order to achieve our primary objective, we intend to leverage the advantages of blockchain. This will enable us to ensure clear visibility of construction materials, deadlines, subcontractors and any other elements that are part of a construction project.
{"title":"Smart Contracts in Construction from Management to Materials: Acting as a Bridge between the Two","authors":"Norbert Forman, József Udvaros","doi":"10.4028/p-hui96q","DOIUrl":"https://doi.org/10.4028/p-hui96q","url":null,"abstract":"The goal of this article is to demonstrate how smart contracts can be leveraged via blockchain technologies. This will enable us to create a bridge between management and the materials used in the construction industry. It is all too common for construction projects to encounter a number of problems along the way, including a lack of communication between builders, laborers, and vendors. As a result of these issues, the proposed timelines and quality of construction end up being compromised. Oftentimes, stakeholders involved in the project are not quite aware of the quality and quantity of materials that will be used to complete the project. It is precisely this problem that we aim to solve through the use of blockchain technology. As a result of the use of blockchain technology, smart contracts offer transparency and trust to their stakeholders. In order to achieve our primary objective, we intend to leverage the advantages of blockchain. This will enable us to ensure clear visibility of construction materials, deadlines, subcontractors and any other elements that are part of a construction project.","PeriodicalId":34329,"journal":{"name":"Journal of Electrical and Computer Engineering Innovations","volume":"296 ","pages":"43 - 48"},"PeriodicalIF":0.0,"publicationDate":"2023-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72422807","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}
Both the air-water dispersion coefficient and the air-nanofluid (CuO) dispersion coefficient were studied and measured in a double-pipe heat exchanger. Pumping air into a tank fitted with a Rushton turbulent impeller resulted in gas-liquid dispersion. In order to test the effects of varying operating conditions on the air-water and air-nanofluid dispersions, they were heated and pumped into the tube of a double-pipe heat exchanger. Reynolds numbers of Rec= 4750-13100 on the shell side and Reh=19900-64000 on the tube side were used to get the total heat transfer coefficient (Uo). The dispersion in the hot fluid tank was achieved by combining the two-phase fluids using a Rushton turbine impeller. It was discovered that the conscious phase saw a significant drop in the heat transfer coefficient when the air bubbles dissipated. Because the impeller's agitation speed affects the rate at which air bubbles are broken, the heat transfer coefficient in the case of dispersion rises as Reh and Rec rise. For all examined parameter values, CuO nanofluid showed significant heat transfer improvement. The heat transfer rate of gas-liquid dispersion increases by nanofluid by as much as 135.5% compared to gas-liquid dispersion which is considered the first attempt for heat transfer enhancement of two phase flow (gas-liquid dispersion) using Nano fluid.
{"title":"The Impact of Gas-Liquid Dispersed Flow on Heat Exchanger Performance with Improvement Using CuO Nanofluid","authors":"Mustafa M. Hathal, Basim O. Hasan, H. Majdi","doi":"10.4028/p-gdl41l","DOIUrl":"https://doi.org/10.4028/p-gdl41l","url":null,"abstract":"Both the air-water dispersion coefficient and the air-nanofluid (CuO) dispersion coefficient were studied and measured in a double-pipe heat exchanger. Pumping air into a tank fitted with a Rushton turbulent impeller resulted in gas-liquid dispersion. In order to test the effects of varying operating conditions on the air-water and air-nanofluid dispersions, they were heated and pumped into the tube of a double-pipe heat exchanger. Reynolds numbers of Rec= 4750-13100 on the shell side and Reh=19900-64000 on the tube side were used to get the total heat transfer coefficient (Uo). The dispersion in the hot fluid tank was achieved by combining the two-phase fluids using a Rushton turbine impeller. It was discovered that the conscious phase saw a significant drop in the heat transfer coefficient when the air bubbles dissipated. Because the impeller's agitation speed affects the rate at which air bubbles are broken, the heat transfer coefficient in the case of dispersion rises as Reh and Rec rise. For all examined parameter values, CuO nanofluid showed significant heat transfer improvement. The heat transfer rate of gas-liquid dispersion increases by nanofluid by as much as 135.5% compared to gas-liquid dispersion which is considered the first attempt for heat transfer enhancement of two phase flow (gas-liquid dispersion) using Nano fluid.","PeriodicalId":34329,"journal":{"name":"Journal of Electrical and Computer Engineering Innovations","volume":"2 1","pages":"1 - 22"},"PeriodicalIF":0.0,"publicationDate":"2023-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82074213","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}
Dijkstra algorithms are typically used to find the shortest path from a source node to a destination node. It is widely used in various applications due to its reliability and less complexity. This paper presents the extended Dijkstra Algorithm with lower latency and consumes less computing memory intended for implementation in many AGVs networks for effective decentralized task distribution path planning. This paper proposed linear regression normalization across the node network in Dijkstra architecture to reduce computing time and memory consumption. The issue addressed through this optimization focused on reducing the possibilities of collision between AGVs and deadlock. The extended Dijkstra algorithm significantly reduces computing time compared to the traditional Dijkstra algorithm. In addition, the proposed solutions suggest better AGV routing for collision avoidance and deadlock prevention possibilities.
{"title":"Low Latency Extended Dijkstra Algorithm with Multiple Linear Regression for Optimal Path Planning of Multiple AGVs Network","authors":"L. Chek","doi":"10.4028/p-t122xr","DOIUrl":"https://doi.org/10.4028/p-t122xr","url":null,"abstract":"Dijkstra algorithms are typically used to find the shortest path from a source node to a destination node. It is widely used in various applications due to its reliability and less complexity. This paper presents the extended Dijkstra Algorithm with lower latency and consumes less computing memory intended for implementation in many AGVs networks for effective decentralized task distribution path planning. This paper proposed linear regression normalization across the node network in Dijkstra architecture to reduce computing time and memory consumption. The issue addressed through this optimization focused on reducing the possibilities of collision between AGVs and deadlock. The extended Dijkstra algorithm significantly reduces computing time compared to the traditional Dijkstra algorithm. In addition, the proposed solutions suggest better AGV routing for collision avoidance and deadlock prevention possibilities.","PeriodicalId":34329,"journal":{"name":"Journal of Electrical and Computer Engineering Innovations","volume":"56 1","pages":"31 - 36"},"PeriodicalIF":0.0,"publicationDate":"2023-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89233203","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}
Regenerative brake control creates an optimal synergy between mechanical and electrical braking. Based on the study of vehicle dynamics under braking conditions propose a new control mode that ensures the best braking performance and maximum braking energy recovery. The implementation of the above control mode requires a combination of the traction control model and the brake control system. The HEV power distribution model is built using Matlab/ Simulink and the simulation results have shown a significant improvement in fuel consumption when using the regenerative braking system.
{"title":"Research Effectiveness of Regeneral Brake Energy on Toyota Prius Vehicles by Matlab/Simulink","authors":"M. Le, Toan Nguyen Van","doi":"10.4028/p-6s83p4","DOIUrl":"https://doi.org/10.4028/p-6s83p4","url":null,"abstract":"Regenerative brake control creates an optimal synergy between mechanical and electrical braking. Based on the study of vehicle dynamics under braking conditions propose a new control mode that ensures the best braking performance and maximum braking energy recovery. The implementation of the above control mode requires a combination of the traction control model and the brake control system. The HEV power distribution model is built using Matlab/ Simulink and the simulation results have shown a significant improvement in fuel consumption when using the regenerative braking system.","PeriodicalId":34329,"journal":{"name":"Journal of Electrical and Computer Engineering Innovations","volume":"51 1","pages":"23 - 29"},"PeriodicalIF":0.0,"publicationDate":"2023-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76615938","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}
We can find cultural monuments everywhere. Smaller ones are often made from available and cheap natural materials - stones. However, due to the weather, due to their smaller dimensions, are often subject to vandalism, damage caused by careless handling or accidental damage. Sometimes they are just pieces of stone, but they have a deeper meaning in connection with cultural value, and for example by studying them in office spaces in the form of 3D models. In our contribution, we focus on the protection, study and preservation of such cultural and artistic monuments made of natural materials or generally stone natural formations or even large stone or brick surfaces. In our article, we want to focus on the practical feasibility rather than the mathematical background, as we believe that this information is much more useful in practice. We point out that it is advisable to use drones to check the condition of materials.
{"title":"An Example of the Use of Photogrammetry for Archiving the Shapes of Natural Materials and Creations","authors":"József Udvaros, Ondrej Takáč","doi":"10.4028/p-81wb7g","DOIUrl":"https://doi.org/10.4028/p-81wb7g","url":null,"abstract":"We can find cultural monuments everywhere. Smaller ones are often made from available and cheap natural materials - stones. However, due to the weather, due to their smaller dimensions, are often subject to vandalism, damage caused by careless handling or accidental damage. Sometimes they are just pieces of stone, but they have a deeper meaning in connection with cultural value, and for example by studying them in office spaces in the form of 3D models. In our contribution, we focus on the protection, study and preservation of such cultural and artistic monuments made of natural materials or generally stone natural formations or even large stone or brick surfaces. In our article, we want to focus on the practical feasibility rather than the mathematical background, as we believe that this information is much more useful in practice. We point out that it is advisable to use drones to check the condition of materials.","PeriodicalId":34329,"journal":{"name":"Journal of Electrical and Computer Engineering Innovations","volume":"18 1","pages":"37 - 42"},"PeriodicalIF":0.0,"publicationDate":"2023-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85276247","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}
In the present work we pay an attention to the molecular structural changes between raw coal and its enriched, dense productions. Bituminous Ukhaa-Khudag coal in the form of an enriched, dense coal product is currently used as an energy source by Mongolian consumers for everyday need. There are three types of samples from one source: it is a raw coal (sample 1) and two of industrial prod- ucts as an enriched, dopant (organic based) added coal (sample 2) and simply enriched coal (sample 3). The raw coal general characterization is given through the elemental analysis, thermogravimetry analysis, moreover functional groups were identified by Fourier Transform infrared spectroscopy. The differences in the FTIR spectra of the samples were done.Some details are as follows: hydroxyl group vibrations are existing, rather weak in agreement of TG result; vibrations of aliphatic group were rarely in the long wave near region, carbonate minerals in the region of 1300-900 cm−1 are visible but overlapped, and an isolated out-of-plane deformational vibration (around 800 cm−1) or two-adjacent (800-750 cm−1) or three-adjacent (around 700 cm−1) of sp2-hybrid bonded aromatic CHx-groups were still presenting.After the processing hydroxyl group bands were affected in enriched coals, sample 2 and 3. In the spectrum of the sample 2 the long wave bands were intensively blurred.Industry processing retains an amount of water in the productions. Water excess influenced absorbance bands were able to be removed via the drying processing, however, the affection to the spectral struc- ture in sample 2 was unrecoverable.
{"title":"FTIR Study of Enriched Bituminous Ukhaa-Khudag Coal","authors":"Munkhtsetseg Sambuu, Nyamdulam Renten, Begzsuren Tumendemberel, Rene Tschaggelar, A. Oleshkevich, Otgonchimeg Tuvdendor, Munkhjargal Sharav, Shilagardi Goolimensee","doi":"10.4028/p-ntfupf","DOIUrl":"https://doi.org/10.4028/p-ntfupf","url":null,"abstract":"In the present work we pay an attention to the molecular structural changes between raw coal and its enriched, dense productions. Bituminous Ukhaa-Khudag coal in the form of an enriched, dense coal product is currently used as an energy source by Mongolian consumers for everyday need. There are three types of samples from one source: it is a raw coal (sample 1) and two of industrial prod- ucts as an enriched, dopant (organic based) added coal (sample 2) and simply enriched coal (sample 3). The raw coal general characterization is given through the elemental analysis, thermogravimetry analysis, moreover functional groups were identified by Fourier Transform infrared spectroscopy. The differences in the FTIR spectra of the samples were done.Some details are as follows: hydroxyl group vibrations are existing, rather weak in agreement of TG result; vibrations of aliphatic group were rarely in the long wave near region, carbonate minerals in the region of 1300-900 cm−1 are visible but overlapped, and an isolated out-of-plane deformational vibration (around 800 cm−1) or two-adjacent (800-750 cm−1) or three-adjacent (around 700 cm−1) of sp2-hybrid bonded aromatic CHx-groups were still presenting.After the processing hydroxyl group bands were affected in enriched coals, sample 2 and 3. In the spectrum of the sample 2 the long wave bands were intensively blurred.Industry processing retains an amount of water in the productions. Water excess influenced absorbance bands were able to be removed via the drying processing, however, the affection to the spectral struc- ture in sample 2 was unrecoverable.","PeriodicalId":34329,"journal":{"name":"Journal of Electrical and Computer Engineering Innovations","volume":"241 1","pages":"63 - 70"},"PeriodicalIF":0.0,"publicationDate":"2023-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80495892","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}
The numerical model is developed to study the vibration response due to the localized defect of ball bearing in rotating machinery. In order to simulate the dynamic response, the equations of motions are developed based on the rotor-bearing system where two identical rotors mounted on symmetric flexible shaft and supported by ball bearings are considered in this model. The presence of defect is introduced on a bearing outer raceway and lubrication effect between bearing components is also included. The numerical results are obtained by applying Runge–Kutta method to solve governing equations of motions. It has been observed that the vibration spectrum of the ball pass frequency outer race and its harmonics for the defect bearing is relatively higher than the good one. Moreover, this dynamic model can effectively enhance the understanding of vibration responses for good and defective bearing.
{"title":"Dynamic Modeling and Analysis of Rotor-Bearing System with Localized Defect in Rotating Machinery","authors":"Supattarachai Sudsawat, Pirapat Arunyanart","doi":"10.4028/p-kopelx","DOIUrl":"https://doi.org/10.4028/p-kopelx","url":null,"abstract":"The numerical model is developed to study the vibration response due to the localized defect of ball bearing in rotating machinery. In order to simulate the dynamic response, the equations of motions are developed based on the rotor-bearing system where two identical rotors mounted on symmetric flexible shaft and supported by ball bearings are considered in this model. The presence of defect is introduced on a bearing outer raceway and lubrication effect between bearing components is also included. The numerical results are obtained by applying Runge–Kutta method to solve governing equations of motions. It has been observed that the vibration spectrum of the ball pass frequency outer race and its harmonics for the defect bearing is relatively higher than the good one. Moreover, this dynamic model can effectively enhance the understanding of vibration responses for good and defective bearing.","PeriodicalId":34329,"journal":{"name":"Journal of Electrical and Computer Engineering Innovations","volume":"6 1","pages":"21 - 28"},"PeriodicalIF":0.0,"publicationDate":"2023-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79142835","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}
In this article, we are interested in identifying the parameters of an aerobic bioprocess modelused for wastewater treatment. In the field of biotechnology, various computer bugs caused by roundingerrors can induce an error interval that is too wide during data acquisition. For this reason, weare testing a new identification method using a set method based on interval arithmetic. The processstudied is the chemical transformation of ammoniacal nitrogen which takes place in two stages: Reactionof nitrificationdenitrification.The parameters chosen for the identification are the yields andthe maximum growth rates. Initially, the study of observability by a differential algebraic method willsimplify the study of the mathematical model. This nonlinear model is described by six differentialequations. Subsequently, we apply a set method, in particular the propagation of constraints also calledforwardbackward propagation, this technique allowed us to determine intervals containing the variablereturns as well as the maximum specific growth rates defined from the Monod model which describesthe operation of the bioreactor. This method also guarantees the result by rejecting all inconsistentvalues.
{"title":"Forward-Backward Propagation to Identify the Maximum Specific Growth Rates of a Bioreactor","authors":"S. Borsali","doi":"10.4028/p-si0156","DOIUrl":"https://doi.org/10.4028/p-si0156","url":null,"abstract":"In this article, we are interested in identifying the parameters of an aerobic bioprocess modelused for wastewater treatment. In the field of biotechnology, various computer bugs caused by roundingerrors can induce an error interval that is too wide during data acquisition. For this reason, weare testing a new identification method using a set method based on interval arithmetic. The processstudied is the chemical transformation of ammoniacal nitrogen which takes place in two stages: Reactionof nitrificationdenitrification.The parameters chosen for the identification are the yields andthe maximum growth rates. Initially, the study of observability by a differential algebraic method willsimplify the study of the mathematical model. This nonlinear model is described by six differentialequations. Subsequently, we apply a set method, in particular the propagation of constraints also calledforwardbackward propagation, this technique allowed us to determine intervals containing the variablereturns as well as the maximum specific growth rates defined from the Monod model which describesthe operation of the bioreactor. This method also guarantees the result by rejecting all inconsistentvalues.","PeriodicalId":34329,"journal":{"name":"Journal of Electrical and Computer Engineering Innovations","volume":"25 1","pages":"39 - 48"},"PeriodicalIF":0.0,"publicationDate":"2023-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74762763","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：