Pub Date : 2018-09-27DOI: 10.53555/ephijse.v4i3.176
Markos Georgalli
Present article allowed me to elucidate, the Essence, of what is said for Geometry and Physics. In geometry Point P , is nothing and is possessing Zero-magnitude and Infinite directions. In Material-Geometry , Point is the minimum-cave , r, in space possessing cave`s , r , magnitude which is eternally existing from the internal-rotation = motion , of any two Opposites [+ , - ] . Because of this, Material-point is a Quaternion measuring so much the cave`s ,r, magnitude as well as the internal eternal-motion which is motion in , n , lobes .
{"title":"THE HOW ENERGY FROM CHAOS BECOMES ,THE SPIN OF MONADS ,THEIR ENERGY – STORES , AND PHOTONS","authors":"Markos Georgalli","doi":"10.53555/ephijse.v4i3.176","DOIUrl":"https://doi.org/10.53555/ephijse.v4i3.176","url":null,"abstract":"Present article allowed me to elucidate, the Essence, of what is said for Geometry and Physics. In geometry Point P , is nothing and is possessing Zero-magnitude and Infinite directions. In Material-Geometry , Point is the minimum-cave , r, in space possessing cave`s , r , magnitude which is eternally existing from the internal-rotation = motion , of any two Opposites [+ , - ] . Because of this, Material-point is a Quaternion measuring so much the cave`s ,r, magnitude as well as the internal eternal-motion which is motion in , n , lobes . ","PeriodicalId":354866,"journal":{"name":"EPH - International Journal of Science And Engineering","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131813046","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 : 2018-09-27DOI: 10.53555/ephijse.v4i3.179
J. Rodríguez-Martínez, Eduardo A. Rossello, Arquímedes Cruz López, Lilia E.Arriaga-Díaz de León, Javier Eugenio Bermúdez-Cerda
This paper examines the relationships between recent shallow seismicity and exploitation of fluids in the northern Burgos Basin where cumulative seismic events recorded in the State of Nuevo Leon reach a total of 304 earthquakes between 2006 and 2016. In detail, 2 to 5 yearly events occurred from 2006 to 2011; but a later remarkable increase was evident as follows: 89 in 2012, 69 in 2013, 75 in 2014, 31 in 2015 and 27 in 2016. This behavior doesn’t match the random fluctuations from natural seismicity rates. A statistical analysis allowed us to determine that the sequence of earthquakes after 2011 could be related to the activity of exploratory wells in the Burgos Basin, which were drilled down to the Pimienta (Upper Jurassic) and Agua Nueva (Upper Cretaceous) shale gas plays. The epicenters located in the State of Nuevo Leon, in the municipalities of China, General Terán, Montemorelos and Los Ramones, were associated with the Upper Jurassic Pimienta and Upper Cretaceous Agua Nueva shale gas fields. Only 17 earthquakes had magnitudes ranging from 4.0 - 4.5 Richter magnitude and those were associated with the exploratory wells Anhelido-1, Arbolero 1, Batial-1, Durian-1, Kernel-1, Mosquete-1, Neritas-1, Nuncio-1, Serbal-1 and Tangram-1. The hypocenters correspond to the depth at which the Pimienta and Agua Nueva Formations lie; hence, sharp changes in the minor shock frequencies were considered as indicators of induced seismicity related to hydraulic fracturing for fluid extraction. The scatterplot of the frequency and magnitude of events for 2009-2014 shows slopes between -7.0963 to -1.1538 that were considerably more negative than the natural seismicity values which span from 0.75 to 0.9. The slopes for 2012, 2013 and 2014 are negatives (-7.0963, -0.3656 and -0.1333), respectively. These dramatic changes in increasing of the minor shock sequences in the Burgos Basin allow us to be considered as indicators of induced seismicity due to fluid exploitation. This interpretation is based on the frequency and magnitude of shocks which achieve values of hydraulic fracturing-induced earthquakes associated with anthropogenic fracking, similar to other seismicity data obtained in different parts of the world where this Technique is applied.
{"title":"SHALLOW SEISMICITY AND FLUID EXPLOITATION IN THE NORTHERN BURGOS BASIN (NUEVO LEÓN, MÉXICO)","authors":"J. Rodríguez-Martínez, Eduardo A. Rossello, Arquímedes Cruz López, Lilia E.Arriaga-Díaz de León, Javier Eugenio Bermúdez-Cerda","doi":"10.53555/ephijse.v4i3.179","DOIUrl":"https://doi.org/10.53555/ephijse.v4i3.179","url":null,"abstract":"This paper examines the relationships between recent shallow seismicity and exploitation of fluids in the northern Burgos Basin where cumulative seismic events recorded in the State of Nuevo Leon reach a total of 304 earthquakes between 2006 and 2016. In detail, 2 to 5 yearly events occurred from 2006 to 2011; but a later remarkable increase was evident as follows: 89 in 2012, 69 in 2013, 75 in 2014, 31 in 2015 and 27 in 2016. This behavior doesn’t match the random fluctuations from natural seismicity rates. A statistical analysis allowed us to determine that the sequence of earthquakes after 2011 could be related to the activity of exploratory wells in the Burgos Basin, which were drilled down to the Pimienta (Upper Jurassic) and Agua Nueva (Upper Cretaceous) shale gas plays. The epicenters located in the State of Nuevo Leon, in the municipalities of China, General Terán, Montemorelos and Los Ramones, were associated with the Upper Jurassic Pimienta and Upper Cretaceous Agua Nueva shale gas fields. Only 17 earthquakes had magnitudes ranging from 4.0 - 4.5 Richter magnitude and those were associated with the exploratory wells Anhelido-1, Arbolero 1, Batial-1, Durian-1, Kernel-1, Mosquete-1, Neritas-1, Nuncio-1, Serbal-1 and Tangram-1. The hypocenters correspond to the depth at which the Pimienta and Agua Nueva Formations lie; hence, sharp changes in the minor shock frequencies were considered as indicators of induced seismicity related to hydraulic fracturing for fluid extraction. The scatterplot of the frequency and magnitude of events for 2009-2014 shows slopes between -7.0963 to -1.1538 that were considerably more negative than the natural seismicity values which span from 0.75 to 0.9. The slopes for 2012, 2013 and 2014 are negatives (-7.0963, -0.3656 and -0.1333), respectively. These dramatic changes in increasing of the minor shock sequences in the Burgos Basin allow us to be considered as indicators of induced seismicity due to fluid exploitation. This interpretation is based on the frequency and magnitude of shocks which achieve values of hydraulic fracturing-induced earthquakes associated with anthropogenic fracking, similar to other seismicity data obtained in different parts of the world where this Technique is applied. ","PeriodicalId":354866,"journal":{"name":"EPH - International Journal of Science And Engineering","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124328098","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 paper, we put forword to the definition of stochastic normed space, and study its some properties, from there we obtain the definition of stochastic topology space.
本文提出了随机赋范空间的定义，并研究了它的一些性质，由此得到了随机拓扑空间的定义。
{"title":"ABOUT THE DEFINITIONS OF THE STOCHASTIC TOPOLOGICAL SPACE","authors":"X. Xia","doi":"10.53555/eijse.v4i3.174","DOIUrl":"https://doi.org/10.53555/eijse.v4i3.174","url":null,"abstract":"In this paper, we put forword to the definition of stochastic normed space, and study its some properties, from there we obtain the definition of stochastic topology space.","PeriodicalId":354866,"journal":{"name":"EPH - International Journal of Science And Engineering","volume":"320 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133551673","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 : 2018-08-31DOI: 10.53555/ephijse.v4i3.178
Basma Usama, Rafid Al Hamawandi
Due to the huge changes around the world, along with the changes occurred in core of thoughts, technologies and environment, in which has its reflection significantly on the societies and business in Governmental and private institutions , and due to the different visions occurred in the work professional market, along with the accelerated occurred changes, such changes, has its impacts on the Students mentalities, attitudes, circumstances, and their environment, in addition to the impact on the engineering practice and architectural practice, and in order to occur educational change in parallel, that is synchronized with the accelerated changes in the world, it became crucial to re-orient the educational programs towards the new generations and mechanisms of educational programs that suits with the newly different attitudes, nature, and mentality. The objective considered two components for such new paradigm: - Considering the core of thought of the second generation of architectural education - Search for the mechanisms required for such core of thought in which the self-learning mechanism is considered as one of its pillars. It is based on three premises: To go in line, with the newly development occurred in Architectural educational programs worldwide, especially in interacting with the core of thought related to the second generation of architectural educational programs. Considering the concept philosophy of “self-learning” along with its mechanisms in stimulating student potentials through effective interaction. Designing the program paradigm based on the two points above, to be synchronized and tailored to the newly different student characteristics in terms of his/her circumstances, thoughts, mentality, and environment.
{"title":"COACHING THRESHOLD – ARCHITECTURAL ALTERED TEACHING METHOD PARADIGM APPLIED EXPERIMENTAL SHOWCASE IN IRAQ","authors":"Basma Usama, Rafid Al Hamawandi","doi":"10.53555/ephijse.v4i3.178","DOIUrl":"https://doi.org/10.53555/ephijse.v4i3.178","url":null,"abstract":"Due to the huge changes around the world, along with the changes occurred in core of thoughts, technologies and environment, in which has its reflection significantly on the societies and business in Governmental and private institutions , and due to the different visions occurred in the work professional market, along with the accelerated occurred changes, such changes, has its impacts on the Students mentalities, attitudes, circumstances, and their environment, in addition to the impact on the engineering practice and architectural practice, and in order to occur educational change in parallel, that is synchronized with the accelerated changes in the world, it became crucial to re-orient the educational programs towards the new generations and mechanisms of educational programs that suits with the newly different attitudes, nature, and mentality. The objective considered two components for such new paradigm: - Considering the core of thought of the second generation of architectural education \u0000- Search for the mechanisms required for such core of thought in which the self-learning mechanism is considered as one of its pillars. \u0000It is based on three premises: \u0000 \u0000To go in line, with the newly development occurred in Architectural educational programs worldwide, especially in interacting with the core of thought related to the second generation of architectural educational programs. \u0000Considering the concept philosophy of “self-learning” along with its mechanisms in stimulating student potentials through effective interaction. \u0000Designing the program paradigm based on the two points above, to be synchronized and tailored to the newly different student characteristics in terms of his/her circumstances, thoughts, mentality, and environment. \u0000","PeriodicalId":354866,"journal":{"name":"EPH - International Journal of Science And Engineering","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128100575","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}
Datta P. Khade, Rahul D. Pandit, Dr. Abhijeet P. Wadekar
This paper presents an analysis on performance-based seismic evaluation of G+20 RC frame Building with masonry infill (MI) and shear wall (SW) for lift using Non-linear Static Pushover Analysis with SAP2000v14 software for two different models i.e., Model-1: RC bare frame and Model-2: RC frame with MI wall and SW for lift (Soft storey). Result indicates, maximum Displacement for Model-1 i.e., 0.3346m, Model-2 gave displacement of 0.0718m respectively. These results clearly show, the stiffening in Model-2 is increased to 78.54% compared to Bare Frame.
{"title":"“SEISMIC RESPONSE OF INFILL FRAME G+20 BUILDING WITH SHEAR WALL FOR LIFT USING SAP 2000 SOFTWARE”","authors":"Datta P. Khade, Rahul D. Pandit, Dr. Abhijeet P. Wadekar","doi":"10.53555/eijse.v4i3.168","DOIUrl":"https://doi.org/10.53555/eijse.v4i3.168","url":null,"abstract":"This paper presents an analysis on performance-based seismic evaluation of G+20 RC frame Building with masonry infill (MI) and shear wall (SW) for lift using Non-linear Static Pushover Analysis with SAP2000v14 software for two different models i.e., Model-1: RC bare frame and Model-2: RC frame with MI wall and SW for lift (Soft storey). Result indicates, maximum Displacement for Model-1 i.e., 0.3346m, Model-2 gave displacement of 0.0718m respectively. These results clearly show, the stiffening in Model-2 is increased to 78.54% compared to Bare Frame. \u0000 ","PeriodicalId":354866,"journal":{"name":"EPH - International Journal of Science And Engineering","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132613996","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}
Greg, Wang Weiqi, Wang Aogang, Dong Huaxiong, Zhuang Yuxin, Z. Yun
A multi-legged intelligent walking robot was developed for the purpose of industrial inspection in this paper. The robot described in this article is STM32F429 as the main control chip, equipped with ultrasonic module for automatic obstacle avoidance, gyro module for direction designation, voice module for command control, temperature and humidity, camera sensor for data collection, through the serial port to the rudder with atmega328 chip The machine control board sends the serial port commands to form a closed-loop automatic control to realize the integrated control of 18 servos, and achieve the purpose of automatically inspecting and collecting environmental data in real time in the factory.
{"title":"SPIDER HEXAPOD ROBOT BASED ON STM32F429","authors":"Greg, Wang Weiqi, Wang Aogang, Dong Huaxiong, Zhuang Yuxin, Z. Yun","doi":"10.53555/eijse.v4i4.167","DOIUrl":"https://doi.org/10.53555/eijse.v4i4.167","url":null,"abstract":"A multi-legged intelligent walking robot was developed for the purpose of industrial inspection in this paper. The robot described in this article is STM32F429 as the main control chip, equipped with ultrasonic module for automatic obstacle avoidance, gyro module for direction designation, voice module for command control, temperature and humidity, camera sensor for data collection, through the serial port to the rudder with atmega328 chip The machine control board sends the serial port commands to form a closed-loop automatic control to realize the integrated control of 18 servos, and achieve the purpose of automatically inspecting and collecting environmental data in real time in the factory. \u0000 ","PeriodicalId":354866,"journal":{"name":"EPH - International Journal of Science And Engineering","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123377052","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 study, we propose a new formulation based on a global method to model a rectangular waveguide array as antenna. Our method consists to combine the method of moment (MoM), the generalized equivalent circuit method (GECM) and Floquet modal analysis. Looking for rigor, simplicity and rapidity, we repose always on the simple discontinuity in an open rectangular waveguide. So, we extended our pervious works to study in first step an infinite rectangular waveguides array and we achieve with a finite one. For validation purpose, we consider two rectangular waveguides and we compered it whit the same structure studied by direct method in our previous study. Obtained numerical results are presented and discussed. A good agreement is shown and the boundary conditions are verified.
{"title":"GLOBAL METHOD COMBINED WITH FLOQUET MODAL ANALYSIS TO MODEL AN ANTENNA BASED ON RECTANGULAR WAVEGUIDE ARRAY","authors":"Abdessalem Kaddouri, B. Hamdi, M. Aidi, T. Aguili","doi":"10.53555/eijse.v4i2.171","DOIUrl":"https://doi.org/10.53555/eijse.v4i2.171","url":null,"abstract":"In this study, we propose a new formulation based on a global method to model a rectangular waveguide array as antenna. Our method consists to combine the method of moment (MoM), the generalized equivalent circuit method (GECM) and Floquet modal analysis. Looking for rigor, simplicity and rapidity, we repose always on the simple discontinuity in an open rectangular waveguide. So, we extended our pervious works to study in first step an infinite rectangular waveguides array and we achieve with a finite one. For validation purpose, we consider two rectangular waveguides and we compered it whit the same structure studied by direct method in our previous study. Obtained numerical results are presented and discussed. A good agreement is shown and the boundary conditions are verified.","PeriodicalId":354866,"journal":{"name":"EPH - International Journal of Science And Engineering","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117047779","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 most cases, the rivers that flow in the alluvial aquifers are hydraulically connected to them. So, in such areas, it is essential to determine the relationship between the river and the aquifer. In this study, hydraulic connection between alluvial aquifer of Isfahan city and Zayandehroud River are evaluated. The main recharge source of this alluvial aquifer is Zayandehroud River. In recent years from March to November, due to the shortage of water and consumption of whole of the river flow rate in the upstream of the Isfahan city, the flow to the Isfahan region is disconnected. Therefore, the November and December are those months which are respectively the end of the dry period and the start of the river flow period. Using the groundwater isopotential maps of the November and December, 2015, the hydraulic connection between the river and aquifer during the dry and wet period was compared. The obtained results show that during the period of water flow in the river, there is an effective connection between river and aquifer. In most places the river recharges the aquifer. In some parts of aquifer in the south of the river, considerable cones of depression caused by heavy pumping have been created which changed the normal pattern of groundwater flow to a forced recharge from the river. Most recharge to the Isfahan aquifer by the river occurs in the western part of the city till the region of Khajo Bridge. The amount of this recharge is about 55028 m3/day.
{"title":"AN APPLIED METHOD FOR ESTIMATING THE AMOUNT OF WATER EXCHANGE BETWEEN THE SEASONAL RIVERS AND AQUIFER, CASE STUDY: ZAYANDEHROUD RIVER IN THE CITY OF ISFAHAN","authors":"G. Karami, Farid Fazileh, R. Ajalloeian","doi":"10.53555/eijse.v4i2.170","DOIUrl":"https://doi.org/10.53555/eijse.v4i2.170","url":null,"abstract":"In most cases, the rivers that flow in the alluvial aquifers are hydraulically connected to them. So, in such areas, it is essential to determine the relationship between the river and the aquifer. In this study, hydraulic connection between alluvial aquifer of Isfahan city and Zayandehroud River are evaluated. The main recharge source of this alluvial aquifer is Zayandehroud River. In recent years from March to November, due to the shortage of water and consumption of whole of the river flow rate in the upstream of the Isfahan city, the flow to the Isfahan region is disconnected. Therefore, the November and December are those months which are respectively the end of the dry period and the start of the river flow period. Using the groundwater isopotential maps of the November and December, 2015, the hydraulic connection between the river and aquifer during the dry and wet period was compared. The obtained results show that during the period of water flow in the river, there is an effective connection between river and aquifer. In most places the river recharges the aquifer. In some parts of aquifer in the south of the river, considerable cones of depression caused by heavy pumping have been created which changed the normal pattern of groundwater flow to a forced recharge from the river. Most recharge to the Isfahan aquifer by the river occurs in the western part of the city till the region of Khajo Bridge. The amount of this recharge is about 55028 m3/day.","PeriodicalId":354866,"journal":{"name":"EPH - International Journal of Science And Engineering","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114622142","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 paper, a one dimensional model was developed for the analytical evaluation of the thermal performance of adelugeable flat tube bundle to be incorporated in the second stage of an induced draft hybrid (dry/wet) dephlegmator(HDWD) of a direct air-cooled steam condenser (ACSC). A one-dimensional model is analysed by using three methodsof analysis which are: Poppe, Merkel, and heat and mass transfer analogy. The model’s accuracy was validated througha comparison of solutions obtained from the above-mentioned methods of analysis. Satisfactory correlations between theresults were reached. However, heat transfer rate attained by Poppe method is higher by 2.89% and 9.87% than thatobtained by Merkel, and heat and mass analogy methods, respectively. The difference in air-side pressure drop obtainedby all the methods found to be insignificant. Furthermore, the best configuration of the flat tube bundle for the secondstage of induced draft HDWD was identified through the comparison of its performance to the round tube bundle. Theperformance of the round tube bundle is found to be around 2 and 1.5 times of that of flat tube bundle, when both bundles operate in wet and dry operating modes respectively.
{"title":"MODELLING OF A DELUGEABLE FLAT BARE TUBE BUNDLE FOR AN AIR-COOLED STEAM CONDENSER","authors":"Ester Angula","doi":"10.53555/eijse.v4i2.161","DOIUrl":"https://doi.org/10.53555/eijse.v4i2.161","url":null,"abstract":"In this paper, a one dimensional model was developed for the analytical evaluation of the thermal performance of adelugeable flat tube bundle to be incorporated in the second stage of an induced draft hybrid (dry/wet) dephlegmator(HDWD) of a direct air-cooled steam condenser (ACSC). A one-dimensional model is analysed by using three methodsof analysis which are: Poppe, Merkel, and heat and mass transfer analogy. The model’s accuracy was validated througha comparison of solutions obtained from the above-mentioned methods of analysis. Satisfactory correlations between theresults were reached. However, heat transfer rate attained by Poppe method is higher by 2.89% and 9.87% than thatobtained by Merkel, and heat and mass analogy methods, respectively. The difference in air-side pressure drop obtainedby all the methods found to be insignificant. Furthermore, the best configuration of the flat tube bundle for the secondstage of induced draft HDWD was identified through the comparison of its performance to the round tube bundle. Theperformance of the round tube bundle is found to be around 2 and 1.5 times of that of flat tube bundle, when both bundles operate in wet and dry operating modes respectively.","PeriodicalId":354866,"journal":{"name":"EPH - International Journal of Science And Engineering","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129893196","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}
Permanent magnet synchronous motor is the most drive motor of electric cars, to solve the problem of permanent magnet synchronous motor without position sensor speed control system has speed detection delay, error detection, slow dynamic response etc. The speed of sliding mode observer for permanent magnet synchronous motor used in electric vehicles, analyzes the structure and principle of sliding mode observer, combined with the mathematical model of PMSM, the design of electric vehicle speed sliding mode observer for permanent magnet synchronous motor. The simulation speed of sliding mode observer designed by MATLAB, the simulation results show that the speed of sliding mode observer for permanent magnet synchronous motor in electric vehicle design has the advantages of fast detection speed, small detection error, fast dynamic response etc
{"title":"RESEARCH OF SPEED SLIDING MODE OBSERVER FOR PERMANENT MAGNET SYNCHRONOUS MOTOR FOR ELECTRIC VEHICLE","authors":"Liu Chenghao","doi":"10.53555/eijse.v4i2.164","DOIUrl":"https://doi.org/10.53555/eijse.v4i2.164","url":null,"abstract":"Permanent magnet synchronous motor is the most drive motor of electric cars, to solve the problem of permanent magnet synchronous motor without position sensor speed control system has speed detection delay, error detection, slow dynamic response etc. The speed of sliding mode observer for permanent magnet synchronous motor used in electric vehicles, analyzes the structure and principle of sliding mode observer, combined with the mathematical model of PMSM, the design of electric vehicle speed sliding mode observer for permanent magnet synchronous motor. The simulation speed of sliding mode observer designed by MATLAB, the simulation results show that the speed of sliding mode observer for permanent magnet synchronous motor in electric vehicle design has the advantages of fast detection speed, small detection error, fast dynamic response etc","PeriodicalId":354866,"journal":{"name":"EPH - International Journal of Science And Engineering","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123811174","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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