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2018 Recent Advances on Engineering, Technology and Computational Sciences (RAETCS)最新文献

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Chaos Elimination in Fractional-Order Single-Machine-Infinite-Bus Power System Using State-Feedback Control 基于状态反馈控制的分数阶单机-无限母线电力系统混沌消除
Pub Date : 2018-02-01 DOI: 10.1109/RAETCS.2018.8443793
P. K. Dewangan, Bimalesh Chandra Rout, D. Lal
A fractional-order single-machine-infinite-bus (SMIB) power system model is studied numerically and dynamic behavior of the system is analyzed. The system shows chaotic oscillations when the parameter values or the order of the system dynamics differential equations fall into certain range. A simple state-feedback approach is applied which tends to extract low-periodic orbits from chaotic attractor and hence convert chaos into periodic motion. Numerical simulation results are obtained for robustness analysis against perturbations in initial condition as well as external disturbance which verifies the required control goal.
对分数阶单机无限母线(SMIB)电力系统模型进行了数值研究,分析了系统的动态特性。当系统动力学微分方程的参数值或阶数在一定范围内时,系统出现混沌振荡。采用一种简单的状态反馈方法,从混沌吸引子中提取低周期轨道,从而将混沌转化为周期运动。数值仿真结果验证了系统对初始扰动和外部扰动的鲁棒性分析,验证了控制目标的有效性。
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引用次数: 2
Aperture Coupled Patch Antenna for Dual Band Operation 4.5/5.5 GHz 孔径耦合贴片天线,双频工作4.5/5.5 GHz
Pub Date : 2018-02-01 DOI: 10.1109/RAETCS.2018.8443811
R. K. Bajpai, Rajeev Paulus, Ashish Singh, M. Aneesh
This manuscript presents, the analysis of aperture coupled microstrip antenna for 4.5/5.5 GHz band is proposed using method of moment. The designed antenna stricture is represented to its equivalent circuit diagram. The equivalent circuit has been used for obtaining its reflection coefficient and VSWR. The theoretical result obtained is compared with simulated result and there are in close agreement. It has been observed that radiating structure resonate at dual frequencies i.e., 4.5 GHz and 5.5 GHz with frequency ratio of 1.22.
本文提出了用矩量法分析4.5/5.5 GHz频段孔径耦合微带天线的方法。设计的天线结构用等效电路图表示。利用等效电路计算了其反射系数和驻波比。将理论计算结果与仿真结果进行了比较,两者吻合较好。观察到辐射结构在4.5 GHz和5.5 GHz双频共振,频率比为1.22。
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引用次数: 0
Design of Robust Feedback Controller for a UPS System in Industrial Application 工业应用中UPS系统鲁棒反馈控制器设计
Pub Date : 2018-02-01 DOI: 10.1109/RAETCS.2018.8443809
V. Naik, S. Gudey, Arjuna Rao Anuku
This paper presents a novel Sliding Mode Control (SMC) approach for a three phase AC/DC/AC Voltage source UPS used in Industrial applications. The proposed controller is robust for sudden change in loads and more efficient. Most of the industries run with critical loads, so there is always a need to supply better quality of inverter output voltage waveform. A mathematical model of the system is derived using state space modeling. Using the model, a design procedure of controller implementation using the state variables necessary to obtain a stable system is developed. It can be operated for both linear and non-linear load conditions very effectively. It reduces steady state error and is easy to implement. Load voltage regulation is also found to be within the standards. The dynamic nature of the controller is verified. A phase trajectory is plotted to show the nature of the SMC characteristic in reaching the origin. Frequency response characteristics are plotted to realize the state variables to obtain stability. The simulation work is performed in PSCAD/EMTDC version 4.6. and the system stability condition is analyzed from frequency response plots obtained in MATLAB R2012b platform. The proposed controller can be effectively used in all high power industrial applications.
本文提出了一种新的滑模控制方法,用于工业应用的三相AC/DC/AC电压源UPS。所提出的控制器对负载的突然变化具有鲁棒性和更高的效率。大多数行业都有临界负载,因此总是需要提供更好质量的逆变器输出电压波形。利用状态空间建模方法建立了系统的数学模型。利用该模型,给出了利用状态变量实现稳定系统的控制器设计过程。它可以非常有效地在线性和非线性载荷条件下运行。它减少了稳态误差,易于实现。负载电压调节也在标准范围内。验证了控制器的动态特性。绘制了相位轨迹,以显示到达原点时SMC特性的性质。绘制频率响应特性来实现状态变量,以获得稳定性。仿真工作在PSCAD/EMTDC 4.6版本中进行。利用MATLAB R2012b平台得到的频率响应图对系统的稳定性进行了分析。所提出的控制器可以有效地用于所有高功率工业应用。
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引用次数: 1
E2E QoS Support Aided ITPC WiFi Network for Baghdad City: Performance Analysis E2E QoS支持辅助巴格达市ITPC WiFi网络性能分析
Pub Date : 2018-02-01 DOI: 10.1109/RAETCS.2018.8443955
H. M. T. Al-Hilfi, I. Marghescu, A. A. Sahrab
The ministry of communications (MoC) in Iraq owns the Iraqi Telecommunication and Post Company (ITPC). MoC mainly oversees the construction and operation of ITPC which provides “Wireless Internet service” in Iraq. ITPC is the main state owned company that involves in providing internet service to the public. ITPC has regarded that last mile connectivity by wireless broadband access as a cost-effective solution. In this context, WiMAX has been chosen to support the required Quality of Service (QoS) to the end users. ITPC also has chosen WiFi for last mile access. In this paper, we propose a design for ITPC WiFi network for Baghdad city based on location reality to offer internet service. We have modeled and simulated the ITCP WiFi network using OPNET 14.5 simulator. Specifically, two scenarios of ITPC WiFi network have been designed, devised and taken up for analysis. The scenarios are as follows: (1) Designing ITPC WiFi network deprived of end to end QoS arrangement and (2) with end to end QoS arrangement to enhance the performance. Both the scenarios are investigated using various types of traffic and comparisons have been performed. Our studies have shown that better performance can be obtained when ITPC WiFi network exploit E2E QoS solution. Also, it is demonstrated that delay endured by the network gets reduced by 48% and the throughput increases by 8%.
伊拉克通信部(MoC)拥有伊拉克电信和邮政公司(ITPC)。商务部主要负责监督在伊拉克提供“无线互联网服务”的ITPC的建设和运营。ITPC是向公众提供互联网服务的主要国有公司。ITPC认为通过无线宽带接入的最后一英里连接是一种经济有效的解决方案。在这种情况下,选择WiMAX来支持向最终用户提供所需的服务质量(QoS)。ITPC也选择了WiFi作为最后一英里的接入。本文提出了一种基于位置现实的巴格达市ITPC WiFi网络设计方案,以提供互联网服务。利用OPNET 14.5模拟器对ITCP WiFi网络进行了建模和仿真。具体来说,对ITPC WiFi网络的两种场景进行了设计、设计和分析。主要有两种场景:(1)设计ITPC WiFi网络,剥夺端到端QoS安排;(2)设计端到端QoS安排,提高性能。使用不同类型的流量对这两种场景进行了研究,并进行了比较。我们的研究表明,ITPC WiFi网络采用端到端QoS解决方案可以获得更好的性能。同时,网络承受的延迟减少了48%,吞吐量增加了8%。
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引用次数: 0
Design and Analysis of MEMS Varactor MEMS变容管的设计与分析
Pub Date : 2018-02-01 DOI: 10.1109/RAETCS.2018.8443907
K. Pandey, N. Mishra, R. Singh
We report the design and analysis of tunable MEMS varactor based on a parallel plate structure using electrostatic actuation. The device is simulated for increasing tuning range to achieving high Q value and explore its application for large range of frequencies. The response of the tunable capacitor has been analyzed for Aluminum, nickel, copper and gold materials with different mechanical suspension. The varactor is designed for the application in GHz frequency range. Pull in voltage, tuning range and the capacitance change with applied voltage between the plates of the varactor structure has been investigated. The simulation has been carried out using COMSOL Multiphysics finite element modeling tool.
本文报道了一种基于静电驱动的并联板结构的可调谐MEMS变容管的设计与分析。对该装置进行了仿真,以提高调谐范围,达到高Q值,并探索其在大频率范围内的应用。分析了可调谐电容器对铝、镍、铜、金等不同机械悬挂材料的响应。该变容器是为GHz频率范围内的应用而设计的。研究了变容管结构的拉入电压、调谐范围以及板间电容随外加电压的变化。利用COMSOL Multiphysics有限元建模工具进行仿真。
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引用次数: 1
Maintenance of Medical Records Database and Simulation of Gene Therapy using Big Data Concepts 病案数据库维护与大数据基因治疗模拟
Pub Date : 2018-02-01 DOI: 10.1109/RAETCS.2018.8443788
S. S, N. M, Nivedita Suresh Kumar Nair, S. Kannan
In the current circumstance the best test that we confront is the accumulation and upkeep of physical data when contrasted with data put away in a virtual environment. As consistently passes, we have no restrictions for the data or data we get and this is an immediate aftereffect of the propelling advancement and the need to comprehend the necessity for extra. The proposed configuration uses focal thoughts of Big Data, that is, Data warehousing, Data mining and Machine learning. Cloud is utilized to make a dispersed database for multilateral access of medical records. Show and stacking of data is done by means of a web interface, which is utilized by the doctor's facilities. The data is sent and got by means of a REST API which goes about as an arbiter between the warehouse and the front end application. The warehouse (MongoDB), which is particularly offline, is the data warehousing unit which will go about as both the operational database and the analytical database. Cloud Era will go about as the stage for change and preparing of data into clusters for data mining and machine learning algorithms. The data sets are mined and exchanged to apache Spark for the last stage, i.e., Machine Learning for reproducing germ line and somatic gene therapy. The libraries to be utilized are Spark MLlib, Tensor Flow, Theano, Keras and Scikit Learn. The prepared data is mimicked utilizing MatPlotlib as GUI library. This stage is simply non-commercial and is implied for logical experimentation and instructive purposes.
在目前的情况下,我们面对的最好的测试是物理数据的积累和维护,而不是存储在虚拟环境中的数据。随着时间的推移,我们对获得的数据或数据没有任何限制,这是推动进步的直接后果,需要理解额外的必要性。提出的配置使用了大数据的核心思想,即数据仓库、数据挖掘和机器学习。利用云技术建立分散数据库,实现病历的多边存取。数据的显示和堆叠是通过一个网络界面完成的,这是由医生的设施利用。数据通过REST API发送和获取,REST API充当仓库和前端应用程序之间的仲裁者。仓库(MongoDB)是数据仓库单元,它将作为操作数据库和分析数据库运行。云时代将成为数据挖掘和机器学习算法的变革和准备阶段。数据集被挖掘并交换到apache Spark,用于最后阶段,即用于复制生殖系和体细胞基因治疗的机器学习。要使用的库是Spark MLlib, Tensor Flow, Theano, Keras和Scikit Learn。利用MatPlotlib作为GUI库对准备好的数据进行模拟。这个阶段是简单的非商业和隐含的逻辑实验和指导目的。
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引用次数: 0
An Automatic Segmentation Algorithm of Boundary Layers from B-Mode Ultrasound Images b超图像边界层的自动分割算法
Pub Date : 2018-02-01 DOI: 10.1109/RAETCS.2018.8443959
Amit Kumar, Pratibha
In image segmentation technique, partition an image into meaningful regions with respect to a particular application. In a digital image, pixels of a region have some common calculated properties like color, intensity, texture, depth, motion, etc. These properties are used to cluster pixels of a region in the given image. Segmented images are more meaningful, easy to analyze and are used to locate objects and boundaries. Segmentation of an image is the preliminary step to pattern recognition. Here, we propose an automatic segmentation method of the boundary layers for calculating the value of Intima-Media Thickness (IMT) from lumen-intima & media-adventitia layers without any user intervention from the B-mode ultrasound image of the common carotid artery. The main objective of our work is to explore the possibility and feasibility of a computational approach for the automatic segmentation of boundary layers.
在图像分割技术中,将图像划分为相对于特定应用的有意义的区域。在数字图像中,一个区域的像素具有一些常见的计算属性,如颜色、强度、纹理、深度、运动等。这些属性用于对给定图像中某个区域的像素进行聚类。分割后的图像更有意义,易于分析,可用于定位物体和边界。图像分割是模式识别的第一步。在这里,我们提出了一种边界层的自动分割方法,用于在没有用户干预的情况下从颈总动脉b超图像中计算腔内-内膜和中膜-外膜层的内膜-中膜厚度(IMT)。我们工作的主要目的是探索一种自动分割边界层的计算方法的可能性和可行性。
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引用次数: 0
Small Signal Stability Enhancement of Power System with GA Optimized PD type PSS and AVR Control 遗传算法优化PD型PSS和AVR控制增强电力系统小信号稳定性
Pub Date : 2018-02-01 DOI: 10.1109/RAETCS.2018.8443890
B. Rout, B. B. Pati, Ashribad Pattnaik
The small signal oscillatory instability is improved by adding sufficient damping torque for electromechanical modes of oscillations. The Heffron-Philips (HP) model which is equivalent linearization model of single machine infinite bus (SMIB) is considered for small signal stability. The power system stabilizer (PSS) with automatic voltage regulator (AVR) in synchronous generator produces sufficient damping torque and synchronizing torque so as to destabilize the small signal instability during small change in system variables. This paper presents the control design of PD based PSS which supplements the damping torque and reduces the transient oscillations by reducing setting time at constant damping ratio in system response. The controller parameters are tuned with Genetic Algorithm (GA) so as to minimize the speed deviation as objective function. The effectiveness of the controller is verified through time domain analysis at different loading conditions. The whole work is carried out under MATLAB environment platform.
通过对振动的机电模式增加足够的阻尼力矩,改善了小信号振荡的不稳定性。针对小信号稳定性问题,考虑了单机无限母线(SMIB)等效线性化模型Heffron-Philips (HP)模型。同步发电机中带有自动调压器(AVR)的电力系统稳定器(PSS)产生足够的阻尼转矩和同步转矩,从而在系统变量发生微小变化时稳定小信号的不稳定性。本文提出了一种基于PD的PSS控制设计,通过减小系统响应中恒阻尼比下的整定时间来补充阻尼力矩,减少瞬态振荡。采用遗传算法对控制器参数进行整定,以使速度偏差最小为目标函数。通过对不同载荷条件下的时域分析,验证了该控制器的有效性。整个工作在MATLAB环境平台下进行。
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引用次数: 3
High-Performance High Speed IGBT Based Induction Motor Driven By Cycloinverter-Fed with Slit Rotor 狭缝转子环逆变器驱动的高性能高速IGBT感应电动机
Pub Date : 2018-02-01 DOI: 10.1109/RAETCS.2018.8443944
A. Yadav, P. Tiwari, Sarika Kalra
This paper explores the high speed motors which are driven by a cycloinverter-fed with slit rotor. It's showing the overall operation of motors with solid slitted rotor given better rotor construction. These are used in whole circuit heating induction heavy materials, highest frequency control. The power of high frequency controlling maintains and developed high speed with 3 phase capacitor of motors. The 2-pole, 3-phase, 180 kW, 150 Hz high rated motors with solid slitted rotor is designed in RMxprt, Ansys software. Its mechanical parts showing cycloinverter fed 2-pole, 3-phase, 180 kW, 150 Hz highest controlling speed of motor is compared with the cycloinverter fed a conventional three phase 50Hz induction motor. These are showing the induction motors speed, which are we can varied in a ways, first is changing by frequencies and second is changing by the no. of poles. The cycloinverter fed speed of induction motors gives better operating torque which are numerically analyzed that average operating torque is 23 % more than that obtained from cycloinverter fed conventional 50 Hz motors.
本文研究了以狭缝转子为馈源的循环逆变器驱动的高速电机。它显示了电动机的整体运行与固体切缝转子给予更好的转子结构。这些都是采用全电路加热感应重材料,最高频率控制。高频控制功率与电动机三相电容保持高速发展。在Ansys软件RMxprt中设计了两极、三相、180kw、150hz高额定实心分切转子电机。其机械部分显示了与传统三相50Hz异步电动机相比,环逆变器馈电的2极、3相、180kw、150hz电机的最高控制速度。这些显示了感应电机的速度,我们可以通过不同的方式来改变,首先是通过频率来改变,其次是通过no来改变。的波兰人。通过数值分析,与传统的50hz电机相比,采用环逆变器调速的异步电机的平均转矩提高了23%。
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引用次数: 0
Design and Analysis of Wireless Networks Based on ITPC for Performance Improvement 基于ITPC的无线网络性能改进设计与分析
Pub Date : 2018-02-01 DOI: 10.1109/RAETCS.2018.8443855
H. M. T. Al-Hilfi, I. Marghescu, A. A. Sahrab
There has been an upsurge quest for high speed internet service in Iraq after sanctions of the post war of 2003 in Iraq. To satisfy the demand without compromising on the cost, subscriber base and Quality of Service (QoS) pose serious challenges. In Iraq, the chief Internet Service Provider (ISP) namely the ITPC is an Iraqi Telecommunication and Post Company that exploits Wi-Fi in addition to WiMAX standards to provide wireless broadband (WB) access for facilitating very last mile connectivity. In our work, an OPNET modeler is used to study the End-to-End (E2E) QoS design of ITPC WiMAX network. E2E delay, throughput and jitter have been considered as QoS parameters for delay sensitive traffics like voice over Internet Protocol (VoIP) and streaming video, to evaluate the simulated model. For 5 MHz and 10 MHz channel bandwidths the active subscribers load that can be tolerated is tested using the model. The design and analysis of the ITPC WiMAX network described in the paper primarily aims at improving the network performance.
2003年伊拉克战后受到制裁后,伊拉克对高速互联网服务的需求激增。为了在不降低成本的情况下满足需求,用户基础和服务质量(QoS)提出了严峻的挑战。在伊拉克,主要的互联网服务提供商(ISP)即ITPC是一家伊拉克电信和邮政公司,该公司利用Wi-Fi和WiMAX标准提供无线宽带(WB)接入,以促进最后一英里的连接。在我们的工作中,使用OPNET建模器研究了ITPC WiMAX网络端到端(E2E) QoS设计。将端到端延迟、吞吐量和抖动作为时延敏感业务(如VoIP和流视频)的QoS参数,对仿真模型进行评价。对于5mhz和10mhz信道带宽,使用该模型测试了可容忍的活动用户负载。本文对ITPC WiMAX网络的设计和分析主要是为了提高网络性能。
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引用次数: 0
期刊
2018 Recent Advances on Engineering, Technology and Computational Sciences (RAETCS)
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