首页 > 最新文献

Vol 3 No 2最新文献

英文 中文
The Experimental Analysis of Lead Acid Battery by Introducing Graphene & Lead Composite 引入石墨烯-铅复合材料对铅酸电池性能的实验分析
Pub Date : 2020-12-31 DOI: 10.30537/sjet.v3i2.657
Muhammad Atif Qaimkhani, S. Samo, S. Shaikh, Tanweer, Hussain
: In this paper, an experimental analysis of grid material for a lead acid battery is presented, where graphene is introduced in lead by using powder metallurgy technique. In proposed composite, the graphene is added to grid material of lead acid battery to increase battery life cycle, performance, charge acceptance rate. Four lead-graphene composite specimen of different composition are developed, for performing the series of tests to analyze charge acceptance rate. of lead acid battery. The graphene and lead are used with different percentage ratios, a good percentage of the graphene is found between the 0.5% to 2.0%. Experimental result shows the effectiveness of composites prepared. The results obtained also compare with the spongy lead which is being normally used in lead acid batteries.
本文对铅酸电池栅格材料进行了实验分析,采用粉末冶金技术将石墨烯引入铅中。在该复合材料中,将石墨烯添加到铅酸电池的栅格材料中,以提高电池的寿命周期、性能和充电接受率。研制了4种不同成分的铅-石墨烯复合材料试样,进行了电荷接受率的系列试验。铅酸蓄电池。石墨烯和铅以不同的百分比比例使用,在0.5%到2.0%之间发现了良好的石墨烯百分比。实验结果表明了所制备的复合材料的有效性。所得结果还与铅酸电池中常用的海绵铅进行了比较。
{"title":"The Experimental Analysis of Lead Acid Battery by Introducing Graphene & Lead Composite","authors":"Muhammad Atif Qaimkhani, S. Samo, S. Shaikh, Tanweer, Hussain","doi":"10.30537/sjet.v3i2.657","DOIUrl":"https://doi.org/10.30537/sjet.v3i2.657","url":null,"abstract":": In this paper, an experimental analysis of grid material for a lead acid battery is presented, where graphene is introduced in lead by using powder metallurgy technique. In proposed composite, the graphene is added to grid material of lead acid battery to increase battery life cycle, performance, charge acceptance rate. Four lead-graphene composite specimen of different composition are developed, for performing the series of tests to analyze charge acceptance rate. of lead acid battery. The graphene and lead are used with different percentage ratios, a good percentage of the graphene is found between the 0.5% to 2.0%. Experimental result shows the effectiveness of composites prepared. The results obtained also compare with the spongy lead which is being normally used in lead acid batteries.","PeriodicalId":412168,"journal":{"name":"Vol 3 No 2","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114271672","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}
引用次数: 0
Modeling and Simulation of Under -Frequency Relay for Generator Protection 发电机保护低频继电器的建模与仿真
Pub Date : 2020-12-31 DOI: 10.30537/sjet.v3i2.626
A. Memon, M. A. Koondhar, Imdad Ali Memon, Masood Ali Koondhar, I. A. Channa
: Power systems are undergoing structural changes induced by the combination of the operation of microgrids and distributed generation units. This transfiguration has impersonated new challenges in well-established power system practices, coordination of protection systems and especially on the design. Same time, technological improvements in protective equipment have set up the basis for the development of digital frequency relays (DFL) which enable an alternate approach to standard protection schemes. It is necessary for the power system to operates, regulates and manages ancillary services more efficiently to maintain the reliability of the system. The power system is continually laying unexpected contingencies which cause inequality between load demand and generated power. Such uncertainties cause the disturbance in the power system frequency. The only way to maintain power system frequency by balancing load and generation. In this paper, we have designed the under-frequency relay (UFL) model in Matlab simulink. We have noticed that when the load on the system is increased, the designed model shed the extra load and are modeled through under frequency relay by comparing the frequency responses of the power system.
当前,由于微电网和分布式发电机组的联合运行,电力系统正在发生结构性变化。这种变化对现有的电力系统实践,保护系统的协调,特别是设计提出了新的挑战。同时,保护设备的技术改进为数字频率继电器(DFL)的发展奠定了基础,使标准保护方案的替代方法成为可能。为了保证系统的可靠性,电力系统必须更有效地运行、调节和管理辅助业务。电力系统不断发生突发事件,导致负荷需求与发电量不均衡。这种不确定性对电力系统频率产生干扰。维持电力系统频率的唯一途径是平衡负荷和发电量。本文在Matlab simulink中设计了低频继电器(UFL)模型。通过比较电力系统的频率响应,我们注意到当系统负荷增加时,设计的模型会减少额外的负荷,并通过欠频继电器进行建模。
{"title":"Modeling and Simulation of Under -Frequency Relay for Generator Protection","authors":"A. Memon, M. A. Koondhar, Imdad Ali Memon, Masood Ali Koondhar, I. A. Channa","doi":"10.30537/sjet.v3i2.626","DOIUrl":"https://doi.org/10.30537/sjet.v3i2.626","url":null,"abstract":": Power systems are undergoing structural changes induced by the combination of the operation of microgrids and distributed generation units. This transfiguration has impersonated new challenges in well-established power system practices, coordination of protection systems and especially on the design. Same time, technological improvements in protective equipment have set up the basis for the development of digital frequency relays (DFL) which enable an alternate approach to standard protection schemes. It is necessary for the power system to operates, regulates and manages ancillary services more efficiently to maintain the reliability of the system. The power system is continually laying unexpected contingencies which cause inequality between load demand and generated power. Such uncertainties cause the disturbance in the power system frequency. The only way to maintain power system frequency by balancing load and generation. In this paper, we have designed the under-frequency relay (UFL) model in Matlab simulink. We have noticed that when the load on the system is increased, the designed model shed the extra load and are modeled through under frequency relay by comparing the frequency responses of the power system.","PeriodicalId":412168,"journal":{"name":"Vol 3 No 2","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126642902","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}
引用次数: 0
Dynamic Modeling and Vector Control of AC Induction Traction Motor in China Railway 中国铁路交流感应牵引电机动态建模与矢量控制
Pub Date : 2020-12-31 DOI: 10.30537/sjet.v3i2.622
Mannan Hassan, M. S. Shaikh, H. Jadoon, Rao Atif, M. U. Sardar, H. Munir
In this research paper, control of induction motor drive with high-performance characteristics is developed by using vector control, direct-torque control also with the predictive control model. The coordinate transformation has been introduced and established with the mathematical-models of the induction motor (CRH3 high-speed Electric Multiple Units in China Railway) in the two-phase rotating reference frame and the two-phase stationary reference frame. Along-with the discussion of vector control basic principle, the dynamic mathematicalmodel of the induction motor in the two-phase reference frame is presented. Also, the method of the rotor’s field orientation in the two-phase reference frame is presented. Based on some metro-traction motor parameters of 2.7kV and 1KHz voltages and operating Frequency respectively, MATLAB/Simulink simulation result verifies the principle, control performance, and characteristics of different control strategies, which are comparatively analyzed in detail.
本文采用矢量控制、直接转矩控制和预测控制模型对异步电机驱动进行了高性能控制。介绍并建立了感应电动机(中铁CRH3型高速电动车组)在两相旋转参考系和两相静止参考系下的坐标变换数学模型。在讨论矢量控制基本原理的基础上,建立了异步电动机在两相坐标系下的动态数学模型。并给出了转子在两相坐标系下的磁场定位方法。基于2.7kV电压和1KHz工作频率的地铁牵引电机参数,MATLAB/Simulink仿真结果验证了不同控制策略的原理、控制性能和特点,并对其进行了详细的对比分析。
{"title":"Dynamic Modeling and Vector Control of AC Induction Traction Motor in China Railway","authors":"Mannan Hassan, M. S. Shaikh, H. Jadoon, Rao Atif, M. U. Sardar, H. Munir","doi":"10.30537/sjet.v3i2.622","DOIUrl":"https://doi.org/10.30537/sjet.v3i2.622","url":null,"abstract":"In this research paper, control of induction motor drive with high-performance characteristics is developed by using vector control, direct-torque control also with the predictive control model. The coordinate transformation has been introduced and established with the mathematical-models of the induction motor (CRH3 high-speed Electric Multiple Units in China Railway) in the two-phase rotating reference frame and the two-phase stationary reference frame. Along-with the discussion of vector control basic principle, the dynamic mathematicalmodel of the induction motor in the two-phase reference frame is presented. Also, the method of the rotor’s field orientation in the two-phase reference frame is presented. Based on some metro-traction motor parameters of 2.7kV and 1KHz voltages and operating Frequency respectively, MATLAB/Simulink simulation result verifies the principle, control performance, and characteristics of different control strategies, which are comparatively analyzed in detail.","PeriodicalId":412168,"journal":{"name":"Vol 3 No 2","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116660122","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}
引用次数: 10
Micro-Grid Stability Improvement Using Static Synchronous Compensator Assisted with Battery Energy Storage System 利用静态同步补偿器辅助电池储能系统提高微电网稳定性
Pub Date : 2020-12-31 DOI: 10.30537/sjet.v3i2.697
S. Imtiaz, Muhammad Massab Khan, Zubair Yamin, Muhammad, Siddique, Ashfaq Riaz
Integration of distributed generation (DG) with distribution network is essential for best utilization of renewable resources in better economics and clean environmental aspect. Micro-grid (MG) is an aggregation of electrical loads and DGs. Intermittencies of load variation has adverse effect on the voltage at the point of a common couple (PCC). It also prevents the restoring of MG power back to stable state, and voltage instability at PCC makes MG weak interconnection with distribution power grid1. In this article, placement of static synchronous compensator (STATCOM) Assisted with Battery energy storage system (BESS) at PCC scheme is developed. STATCOM assisted with battery energy storage system (BESS) provides instant real power and reactive power support for coupled MG with power grid to ensure voltage stability margin at PCC and it is effective in restoring power stability2,3. Proposed scheme is implemented on a test system which is simulated in MATLAB-SIMULINK. The obtained results verify the effectiveness of placing STATCOM assisted with BESS at PCC.
分布式发电与配电网的集成是实现可再生能源的最佳利用、提高经济效益和清洁环境的必要条件。微电网是电力负荷和微电网的集合体。负载变化的间歇性对共偶点电压有不利影响。它也阻碍了MG电源恢复到稳定状态,PCC电压不稳定使MG与配电网弱互联1。本文研究了在PCC方案下,将静态同步补偿器(STATCOM)与电池储能系统(BESS)配合使用。STATCOM辅助电池储能系统(BESS)为MG与电网的耦合提供即时实功率和无功功率支持,以确保PCC电压稳定裕度,并有效恢复电力稳定2,3。该方案在一个测试系统上实现,并在MATLAB-SIMULINK中进行了仿真。所得结果验证了将STATCOM辅助BESS放置在PCC上的有效性。
{"title":"Micro-Grid Stability Improvement Using Static Synchronous Compensator Assisted with Battery Energy Storage System","authors":"S. Imtiaz, Muhammad Massab Khan, Zubair Yamin, Muhammad, Siddique, Ashfaq Riaz","doi":"10.30537/sjet.v3i2.697","DOIUrl":"https://doi.org/10.30537/sjet.v3i2.697","url":null,"abstract":"Integration of distributed generation (DG) with distribution network is essential for best utilization of renewable resources in better economics and clean environmental aspect. Micro-grid (MG) is an aggregation of electrical loads and DGs. Intermittencies of load variation has adverse effect on the voltage at the point of a common couple (PCC). It also prevents the restoring of MG power back to stable state, and voltage instability at PCC makes MG weak interconnection with distribution power grid1. In this article, placement of static synchronous compensator (STATCOM) Assisted with Battery energy storage system (BESS) at PCC scheme is developed. STATCOM assisted with battery energy storage system (BESS) provides instant real power and reactive power support for coupled MG with power grid to ensure voltage stability margin at PCC and it is effective in restoring power stability2,3. Proposed scheme is implemented on a test system which is simulated in MATLAB-SIMULINK. The obtained results verify the effectiveness of placing STATCOM assisted with BESS at PCC.","PeriodicalId":412168,"journal":{"name":"Vol 3 No 2","volume":"360 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115895651","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}
引用次数: 0
Teaching Oral Communication Skills to Healthcare Personnel Using Communicative Language Teaching Technique 运用交际语言教学法对医护人员进行口语交际技巧教学
Pub Date : 2020-12-31 DOI: 10.30537/sjet.v3i2.599
F. Arain, Hira Khadim, M. A. Jatoi, Hina Manzoor
The importance of communication skills has long been established in the medical and nursing education. Although such skills are taught in medical and nursing undergraduate curriculum around the world, but less attention is being paid towards the communication skills of healthcare personnel in Pakistan. The primary focus of this study is to determine whether the communicative language teaching (CLT) technique had an effect on oral English communication skills of nursing students. This quasi-experimental study was conducted at undergraduate nursing students. Purposive sampling was employed. A pre-test, based on role-plays, was conducted on the baseline status of students followed by a sixteen-hour course. The same roleplay scenarios were given as a post-test. Participants were assessed through rubrics adapted using proficiency descriptor and Cambridge English assessment scale. The Wilcoxon signedrank test was employed to compare scores obtained from pre-test and post-test. The result revealed that the Communication language teaching technique had a significant effect on the oral English communication skills of nursing students.
在医学和护理教育中,沟通技巧的重要性早已确立。尽管这些技能在世界各地的医学和护理本科课程中都有教授,但巴基斯坦对保健人员的沟通技能的关注较少。本研究的主要目的是探讨交际性语言教学对护生英语口语沟通能力的影响。本准实验研究以护理本科学生为研究对象。采用有目的抽样。一个基于角色扮演的预测试是在学生的基线状态下进行的,然后是16个小时的课程。同样的角色扮演场景作为后测试。参与者通过使用熟练程度描述符和剑桥英语评估量表调整的规则进行评估。采用Wilcoxon sign - drunk检验比较前测和后测得分。结果表明:交际语言教学技巧对护生英语口语交际能力有显著的影响。
{"title":"Teaching Oral Communication Skills to Healthcare Personnel Using Communicative Language Teaching Technique","authors":"F. Arain, Hira Khadim, M. A. Jatoi, Hina Manzoor","doi":"10.30537/sjet.v3i2.599","DOIUrl":"https://doi.org/10.30537/sjet.v3i2.599","url":null,"abstract":"The importance of communication skills has long been established in the medical and nursing education. Although such skills are taught in medical and nursing undergraduate curriculum around the world, but less attention is being paid towards the communication skills of healthcare personnel in Pakistan. The primary focus of this study is to determine whether the communicative language teaching (CLT) technique had an effect on oral English communication skills of nursing students. This quasi-experimental study was conducted at undergraduate nursing students. Purposive sampling was employed. A pre-test, based on role-plays, was conducted on the baseline status of students followed by a sixteen-hour course. The same roleplay scenarios were given as a post-test. Participants were assessed through rubrics adapted using proficiency descriptor and Cambridge English assessment scale. The Wilcoxon signedrank test was employed to compare scores obtained from pre-test and post-test. The result revealed that the Communication language teaching technique had a significant effect on the oral English communication skills of nursing students.","PeriodicalId":412168,"journal":{"name":"Vol 3 No 2","volume":"153 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127225624","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}
引用次数: 1
Nature Inspired Optimization Techniques, A review for FANETs 自然启发优化技术,FANETs综述
Pub Date : 2020-12-31 DOI: 10.30537/sjet.v3i2.716
Shahzad Hameed, Q. Minhas, Sheeraz Ahmed, Asif Nawaz, M. Shahzad, Naveed Jan
: Flying Ad Hoc Network (FANET) is a revolutionary achievement in the class of ad hoc networks to access areas near calamities. The concept of pilot free system takes place in technological advancement and computations. Networking advancements introduces Unmanned Aerial System (UAS) while the device that makes this system applicable is known as flying drones or Unmanned Aerial Vehicle (UAV). Single UAV may be employed as individual system, but it is more useful when UAVs in a network cooperate with each other. UAV deployments are rapid and pliant that reduces the tradition ad hoc network limitations. UAV have small operating structure and efficient energy life. Advance flight control mechanism makes FANETs differ from traditional ad hoc networks. FANETs can visualized to play key role where humans are in danger or rescue tasks are too dull or dirty. Improving the performance of flying drones leads to ease-of-use for formation of network, high stability and fast deployment. Routing and cooperative task allocation of nodes is complex in ad hoc networks. In contrast of the study of traditional schemes, our paper is based on the nature inspired schemes. This review study in on routing protocols of BeeAdHoc, AntHocNet and Moth-Ant inspired routing. In addition, the overview leads to wild life behavior of Hill Myna and Desert Sparrow Optimization comparative to other biological algorithms is presented in terms of task allocation and rendezvous cooperatively. Biological inspired behaviors trend to know the efficient problem solutions for FANETs.
飞行自组织网络(FANET)是一项革命性的成就,在自组织网络的类别,以访问灾区附近的地区。无导频系统的概念发生在技术进步和计算中。网络进步引入了无人机系统(UAS),而使该系统适用的设备被称为飞行无人机或无人驾驶飞行器(UAV)。单个无人机可以作为单独的系统使用,但当网络中的无人机相互协作时更有用。无人机部署迅速且灵活,减少了传统自组织网络的限制。无人机操作结构小,能源寿命高。先进的飞行控制机制使fanet有别于传统的自组织网络。在人类处于危险之中或救援任务过于枯燥或肮脏的情况下,可以将fanet可视化地发挥关键作用。提高无人机的飞行性能,使其易于组成网络,稳定性高,部署速度快。在自组织网络中,节点的路由和协同任务分配非常复杂。与传统方案的研究不同,本文的研究是基于自然启发的方案。本文综述了BeeAdHoc路由协议、蚁网路由协议和蛾蚁路由协议。此外,从任务分配和协同交会两个方面概述了山八头和沙漠麻雀优化算法与其他生物算法相比的野生动物行为。生物启发行为趋向于了解fanet问题的有效解决方案。
{"title":"Nature Inspired Optimization Techniques, A review for FANETs","authors":"Shahzad Hameed, Q. Minhas, Sheeraz Ahmed, Asif Nawaz, M. Shahzad, Naveed Jan","doi":"10.30537/sjet.v3i2.716","DOIUrl":"https://doi.org/10.30537/sjet.v3i2.716","url":null,"abstract":": Flying Ad Hoc Network (FANET) is a revolutionary achievement in the class of ad hoc networks to access areas near calamities. The concept of pilot free system takes place in technological advancement and computations. Networking advancements introduces Unmanned Aerial System (UAS) while the device that makes this system applicable is known as flying drones or Unmanned Aerial Vehicle (UAV). Single UAV may be employed as individual system, but it is more useful when UAVs in a network cooperate with each other. UAV deployments are rapid and pliant that reduces the tradition ad hoc network limitations. UAV have small operating structure and efficient energy life. Advance flight control mechanism makes FANETs differ from traditional ad hoc networks. FANETs can visualized to play key role where humans are in danger or rescue tasks are too dull or dirty. Improving the performance of flying drones leads to ease-of-use for formation of network, high stability and fast deployment. Routing and cooperative task allocation of nodes is complex in ad hoc networks. In contrast of the study of traditional schemes, our paper is based on the nature inspired schemes. This review study in on routing protocols of BeeAdHoc, AntHocNet and Moth-Ant inspired routing. In addition, the overview leads to wild life behavior of Hill Myna and Desert Sparrow Optimization comparative to other biological algorithms is presented in terms of task allocation and rendezvous cooperatively. Biological inspired behaviors trend to know the efficient problem solutions for FANETs.","PeriodicalId":412168,"journal":{"name":"Vol 3 No 2","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130912015","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}
引用次数: 3
Computation of Electronic Conductivity of Pentance By Castep As Semiconductor Material 用Castep作为半导体材料计算Pentance的电子导电性
Pub Date : 2020-12-31 DOI: 10.30537/sjet.v3i2.685
{"title":"Computation of Electronic Conductivity of Pentance By Castep As Semiconductor Material","authors":"","doi":"10.30537/sjet.v3i2.685","DOIUrl":"https://doi.org/10.30537/sjet.v3i2.685","url":null,"abstract":"","PeriodicalId":412168,"journal":{"name":"Vol 3 No 2","volume":"124 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131141887","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}
引用次数: 0
The Design of Low-Cost Synchronous Reluctance Motor with a Surrogate-Assisted Optimization Technique 基于代理辅助优化技术的低成本同步磁阻电机设计
Pub Date : 2020-12-31 DOI: 10.30537/sjet.v3i2.587
S. A. Bukhari, Imtiaz Ali Leghari, J.I. Bhatti, S. Raza, M. A. Koondhar, I. A. Channa, M. Usman, Keerio
This paper presents the performance of centrifugal pump coupled with synchronous reluctance motor of 24kW. The 4-pole 36 slots induction motor stator has been used for the prototype. The reduction of torque ripple and power losses is the main aim of research. Different arrangement of rotor flux barrier shapes has been tested through finite element analysis method. The rotor optimization is done by varying different parameters are used such as, barrier edge angle, width of flux carriers, flux barriers and shaft diameter. In order to improve the motor performance, the method of particle swarm optimization has been used by generating samples with surrogate assisted optimization technique. Distinct flux barrier shapes and designs have been checked through simulation. For the prototype development, final V-shaped best model is chosen. The proposed rotor shows the excellent performance in terms of reduced torque ripple (27%) and improved average torque (154Nm) in experimental results. The suggested design also has good thermal and mechanical performances with the capability to use in various industrial applications.
本文介绍了离心泵与24kW同步磁阻电机耦合的性能。原型采用了4极36槽感应电机定子。减小转矩脉动和功率损耗是研究的主要目标。采用有限元分析方法对转子磁通屏障形状的不同排列方式进行了试验。通过改变屏障边缘角、磁通载体宽度、磁通屏障和轴直径等参数对转子进行优化。为了提高电机的性能,采用粒子群优化的方法,利用代理辅助优化技术生成样本。通过仿真验证了不同的流垒形状和设计。在样机研制中,选择最终的v型最佳模型。实验结果表明,所设计的转子在减小转矩脉动(27%)和提高平均转矩(154Nm)方面表现出优异的性能。建议的设计还具有良好的热性能和机械性能,能够在各种工业应用中使用。
{"title":"The Design of Low-Cost Synchronous Reluctance Motor with a Surrogate-Assisted Optimization Technique","authors":"S. A. Bukhari, Imtiaz Ali Leghari, J.I. Bhatti, S. Raza, M. A. Koondhar, I. A. Channa, M. Usman, Keerio","doi":"10.30537/sjet.v3i2.587","DOIUrl":"https://doi.org/10.30537/sjet.v3i2.587","url":null,"abstract":"This paper presents the performance of centrifugal pump coupled with synchronous reluctance motor of 24kW. The 4-pole 36 slots induction motor stator has been used for the prototype. The reduction of torque ripple and power losses is the main aim of research. Different arrangement of rotor flux barrier shapes has been tested through finite element analysis method. The rotor optimization is done by varying different parameters are used such as, barrier edge angle, width of flux carriers, flux barriers and shaft diameter. In order to improve the motor performance, the method of particle swarm optimization has been used by generating samples with surrogate assisted optimization technique. Distinct flux barrier shapes and designs have been checked through simulation. For the prototype development, final V-shaped best model is chosen. The proposed rotor shows the excellent performance in terms of reduced torque ripple (27%) and improved average torque (154Nm) in experimental results. The suggested design also has good thermal and mechanical performances with the capability to use in various industrial applications.","PeriodicalId":412168,"journal":{"name":"Vol 3 No 2","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131085916","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}
引用次数: 0
Current status of microalgae to produce Biogas through Pretreatment of lignocellulosic waste in the era of 21-Century 21世纪木质纤维素废弃物预处理微藻产沼气的现状
Pub Date : 2020-08-10 DOI: 10.20944/preprints202008.0233.v1
A. Ishaq, F. Jabeen, M. Manzoor, T. Younis, A. Noor, F. Noor
Modern day civilization is dependent on energy generation by fossil fuels. But the major drawback of using fossil fuels is environmental pollution. Microalgae are potential candidate for production of various products of interest, such as proteins, mini food, pigments and triglycerides that can be converted into biofuels. Lignocellulosic feedstocks are the most abundantly available raw material of plants that can serve as a promising feedstock for cultivating bacteria, fungi, yeasts and microalgae to produce biofuels and other value-added products. Owing to the abundant availability of these low/no cost substrates, can be utilized as feedstocks for cultivating microalgae to generate biogas/biodiesel. Likewise, there is much room to exploit defatted algal biomass to be used as animal/fish feed and oil producing/accumulating genes knowledge in future to produce high and good quality biodiesel and biogas.
现代文明依赖于化石燃料的能源生产。但使用化石燃料的主要缺点是环境污染。微藻是生产各种感兴趣的产品的潜在候选者,如蛋白质、微型食品、色素和可转化为生物燃料的甘油三酯。木质纤维素原料是植物中最丰富的原料,可以作为培养细菌、真菌、酵母和微藻的有前途的原料,以生产生物燃料和其他增值产品。由于这些低成本/无成本底物的大量可用性,可以用作培养微藻以产生沼气/生物柴油的原料。同样,在未来,利用脱脂藻类生物质作为动物/鱼类饲料和油脂生产/积累基因知识以生产高质量的生物柴油和沼气也有很大的空间。
{"title":"Current status of microalgae to produce Biogas through Pretreatment of lignocellulosic waste in the era of 21-Century","authors":"A. Ishaq, F. Jabeen, M. Manzoor, T. Younis, A. Noor, F. Noor","doi":"10.20944/preprints202008.0233.v1","DOIUrl":"https://doi.org/10.20944/preprints202008.0233.v1","url":null,"abstract":"Modern day civilization is dependent on energy generation by fossil fuels. But the major drawback of using fossil fuels is environmental pollution. Microalgae are potential candidate for production of various products of interest, such as proteins, mini food, pigments and triglycerides that can be converted into biofuels. Lignocellulosic feedstocks are the most abundantly available raw material of plants that can serve as a promising feedstock for cultivating bacteria, fungi, yeasts and microalgae to produce biofuels and other value-added products. Owing to the abundant availability of these low/no cost substrates, can be utilized as feedstocks for cultivating microalgae to generate biogas/biodiesel. Likewise, there is much room to exploit defatted algal biomass to be used as animal/fish feed and oil producing/accumulating genes knowledge in future to produce high and good quality biodiesel and biogas.","PeriodicalId":412168,"journal":{"name":"Vol 3 No 2","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131905919","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}
引用次数: 1
A Modified 3-Point Adams Block Method of the Variable Step Size Strategy for Solving Neutral Delay Differential Equations 中立型时滞微分方程变步长策略的改进三点Adams块法
Pub Date : 2020-03-05 DOI: 10.30537/sjcms.v3i2.452
U. Yashkun, Nurul Huda Abdul Aziz
A modified 3-point Adams block method of order six (3ABM6)to solve neutral delay differential equations (NDDEs) using variable step size strategy is developed. The approximate solution of the retarded and the neutral terms of the neutral delay differential equations at the grid points is obtained using the Newton divided difference interpolation technique. The proposed method will approximate the solution in each step using the three-points concurrently. To determine the performance of the proposed method, the maximum errors (MAXERR) and total number of function calls (FNC) will be compared with the method of 2-point order six predictor-corrector. The numerical results show that the 3ABM6 reduces the number of function calls and better accuracy in term of MAXERR.
提出了一种改进的六阶3点Adams块法,利用变步长策略求解中立型时滞微分方程(NDDEs)。利用牛顿差分插值技术,得到了中立型时滞微分方程的延迟项和中立项在网格点处的近似解。所提出的方法将同时使用三点逼近每一步的解。为了确定所提出的方法的性能,将最大错误(MAXERR)和函数调用总数(FNC)与2点阶6预测校正方法进行比较。数值结果表明,3ABM6减少了函数调用次数,MAXERR精度更高。
{"title":"A Modified 3-Point Adams Block Method of the Variable Step Size Strategy for Solving Neutral Delay Differential Equations","authors":"U. Yashkun, Nurul Huda Abdul Aziz","doi":"10.30537/sjcms.v3i2.452","DOIUrl":"https://doi.org/10.30537/sjcms.v3i2.452","url":null,"abstract":"A modified 3-point Adams block method of order six (3ABM6)to solve neutral delay differential equations (NDDEs) using variable step size strategy is developed. The approximate solution of the retarded and the neutral terms of the neutral delay differential equations at the grid points is obtained using the Newton divided difference interpolation technique. The proposed method will approximate the solution in each step using the three-points concurrently. To determine the performance of the proposed method, the maximum errors (MAXERR) and total number of function calls (FNC) will be compared with the method of 2-point order six predictor-corrector. The numerical results show that the 3ABM6 reduces the number of function calls and better accuracy in term of MAXERR.","PeriodicalId":412168,"journal":{"name":"Vol 3 No 2","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128766589","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}
引用次数: 1
期刊
Vol 3 No 2
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1