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2018 6th International Conference on Control Engineering & Information Technology (CEIT)最新文献

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Public Health Surveillance System for Online Social Networks using One-Class Text Classification 基于一类文本分类的在线社交网络公共卫生监测系统
Bilal Tahir, Kamran Amjad, Samar Firdous, M. Mehmood
Public health surveillance by traditional means is a costly and time consuming process. Today, the widespread use of social media has enabled researchers to study different aspects of life such as health, lifestyle, etc. Anonymous postings on these forums enable people to benefit from the collective experience of others facing similar problems. To effectively discern target data from the outliers in a web corpus, an efficient mechanism is required. Traditional approaches such as keyword-based filtering results in the loss of relevant data due to limited vocabulary and lack of contextual information. In this paper, we present a data filtration framework based on Long short-term memory (LSTM) recurrent neural network model for one-class text classification. We compare similarity of regenerated texts using this model for each disease with the original text using Recall-Oriented Understudy for Gisting Evaluation (ROUGE) metric for outlier filtration and classification. Optimal value of ROUGE similarity threshold is determined by introducing an optimization parameter that minimizes the misclassification rate. Leveraging data from three major online health forums, we show that our classification technique outperforms keyword-based filtering and conventional approach of multi-class text classification. Our classification technique can be effectively used for online social networks, search engines, and online recommender systems.
通过传统手段进行公共卫生监测是一个昂贵和耗时的过程。今天,社交媒体的广泛使用使研究人员能够研究生活的不同方面,如健康、生活方式等。这些论坛上的匿名帖子使人们能够从面临类似问题的其他人的集体经验中受益。为了有效地从网络语料库中的异常值中识别目标数据,需要一种有效的机制。传统的方法,如基于关键字的过滤,由于有限的词汇和缺乏上下文信息,导致相关数据的丢失。本文提出了一种基于LSTM递归神经网络模型的单类文本分类数据过滤框架。我们使用该模型对每种疾病的再生文本与原始文本的相似性进行比较,使用面向回忆的替代评估(ROUGE)指标进行异常值过滤和分类。通过引入一个最小化误分类率的优化参数,确定ROUGE相似阈值的最优值。利用来自三个主要在线健康论坛的数据,我们表明我们的分类技术优于基于关键字的过滤和传统的多类文本分类方法。我们的分类技术可以有效地用于在线社交网络、搜索引擎和在线推荐系统。
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引用次数: 3
Online Tuning of Derivative Order Term in Fractional Controllers 分数阶控制器导数阶项的在线整定
Mert Can Kurucu, E. Yumuk, M. Güzelkaya, I. Eksin
In this study, an online-tuning method for derivative order term of Fractional PD and Filtered Fractional PI controllers is presented. For this purpose, closed-loop step response is divided to certain regions and a different tuning strategy is proposed for each region. These tuning strategies basically depend on the error between the system output and reference input. The strategy formulas are formed as linear equations arranged in terms of system error and system time constant. Simulations are performed to show the effectiveness of the proposed on-line tuning method on various systems.
本文研究了分数阶PD和滤波分数阶PI控制器导数阶项的在线整定方法。为此,将闭环阶跃响应划分为若干区域,并针对每个区域提出不同的调谐策略。这些调优策略基本上取决于系统输出和参考输入之间的误差。策略公式以系统误差和系统时间常数排列成线性方程。仿真结果表明了所提出的在线整定方法在不同系统上的有效性。
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引用次数: 4
Quadcopter Trajectory Tracking and Attitude Control Based on Euler Angle Limitation 基于欧拉角限制的四轴飞行器轨迹跟踪与姿态控制
Billie Pratama, A. Muis, Aries Subiantoro, M. Djemai, R. Ben Atitallah
The aim of this paper is to build a trajectory tracking system considering the attitude of the quadrotor. Nowadays, quadcopter is often used for taking landscape pictures. The roll pitch Euler angle of the quadcopter greatly affects the resulting pictures so that it needs to be controlled. As a limitation, the roll pitch Euler angle based on inertial reference frame is not allowed to be more than fifteen degrees. Two main factors that affect the Euler angle of quadcopter are velocity and acceleration. Therefore, the velocity and acceleration of the UAV is maintained. A linear regression method is used to determine the velocity and acceleration reference that affect the resulting Euler angle. PID (Proportional, Integral, Derivative) controller is used as the controller method for the tracking control system. Finally, the trajectory tracking and attitude control is evaluated through simulation with ROS and Gazebo.
本文的目的是建立一个考虑四旋翼飞行器姿态的轨迹跟踪系统。现在,四轴飞行器经常被用来拍摄风景照片。四轴飞行器的滚摇俯仰欧拉角对产生的图像影响很大,因此需要对其进行控制。作为限制,基于惯性参照系的横摇俯仰欧拉角不允许大于15度。影响四轴飞行器欧拉角的两个主要因素是速度和加速度。因此,保持了无人机的速度和加速度。采用线性回归方法确定影响欧拉角的速度和加速度参考。采用PID(比例、积分、导数)控制器作为跟踪控制系统的控制方法。最后,利用ROS和Gazebo进行仿真,对弹道跟踪和姿态控制进行了评估。
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引用次数: 4
PID Control of DC Servo Motor using a Single Memory Neuron 基于单记忆神经元的直流伺服电机PID控制
Ladjouzi Samir, G. Said, Soufi Youcef
In this paper, a novel approach to determine the optimal values of a PID controller is presented. The proposed method is based on using a single memory neuron which its weights represent the PID parameters. These weights are updated by the well-known bio-inspired algorithm: the particle swarm optimization. To show the efficiency of our method, we have applied it to control a DC servo motor which is used as an actuator for an arm robot manipulator. The obtained results are compared with those a fuzzy logic controller.
本文提出了一种确定PID控制器最优值的新方法。该方法基于单个记忆神经元,其权值代表PID参数。这些权重由著名的生物启发算法更新:粒子群优化。为了证明该方法的有效性,我们将其应用于作为臂式机器人机械臂作动器的直流伺服电机的控制。所得结果与模糊控制器的结果进行了比较。
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引用次数: 1
An Adaptive Wide-Area Damping Control Scheme Considering Networked Induced Time Delays 一种考虑网络时滞的自适应广域阻尼控制方案
Şamil Baycan Yalçın, Mahir Bülent Başel, A. N. Mete
This paper presents an adaptive time delay compensator design based on PMU signals for damping inter-area oscillations. Proposed design employs an adaptive switching period selection algorithm in order to provide near real-time delay compensation. Switching period is decreased adaptively when time delay characteristics change fast. For slow changing dynamics of time delay, the algorithm picks longer switching periods in order to prevent sustained oscillations. Benchmark model of the two area power system and a designed random delay model are employed for simulations. The algorithm is shown to be successful in tracking the fast changing dynamics of a communication network through simulations.
本文提出了一种基于PMU信号的自适应时滞补偿器,用于抑制区域间振荡。该设计采用自适应切换周期选择算法,以提供近实时的延迟补偿。当时延特性变化较快时,自适应减小切换周期。对于时滞变化缓慢的动态,该算法选择较长的切换周期以防止持续振荡。采用两区电力系统的基准模型和设计的随机延迟模型进行仿真。仿真结果表明,该算法能够很好地跟踪通信网络快速变化的动态特性。
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引用次数: 1
Model Reference Adaptive Control of Load Transporting System on Unmanned Aerial Vehicle 无人机载荷输送系统模型参考自适应控制
Aytaç Altan, Özgür Aslan, R. Hacıoğlu
The effective control of gimbal, Vertical Take-Off and Landing (VTOL) and Load Transporting System (LTS) in Unmanned Aerial Vehicles (UAV), which are widely used in mapping, search-and-rescue, exploration and surveillance, border security, real-time image transfer by tracking target and leaving payloads to specified targets in hazardous regions directly affect task performance. In this study, Model Reference Adaptive Control (MRAC) of LTS which has an important role to be able to leave payloads on UAV in real time with minimum error to specified targets is carried out and its effect on duty performance is investigated. The three payloads in the cubic structure are transported by LTS originally designed for real-time specified targets. DC gear motors are used in the LTS so that payloads can be left to real time specified targets. Environmental testing is conducted taking into account the limitations of the physical properties of the LTS on the autonomously moving UAV, and the impact on MRAC’s mission performance is examined.
无人机(UAV)广泛应用于测绘、搜救、探测监视、边境安全、跟踪目标实时图像传输和在危险区域向指定目标投放有效载荷等领域,其云台、垂直起降(VTOL)和载荷输送系统(LTS)的有效控制直接影响任务性能。针对LTS的模型参考自适应控制(Model Reference Adaptive Control, MRAC)问题,研究了其对任务性能的影响。LTS是一种能够使无人机有效载荷以最小的误差实时遗留给指定目标的控制系统。三种载荷在立方结构中由LTS运输,LTS最初是为实时指定目标而设计的。在LTS中使用直流减速电机,以便有效载荷可以实时指定目标。考虑到LTS的物理特性对自主移动无人机的局限性,进行了环境试验,考察了其对MRAC任务性能的影响。
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引用次数: 15
A Comparative Study of the Friction Models with Adaptive Coefficients for a Rotary Triple Inverted Pendulum 旋转式三倒立摆自适应系数摩擦模型的比较研究
Zied Ben Hazem, Mohammad Javad Fotuhi, Z. Bingül
Rotary Inverted Pendulums (RIP) are mechatronic systems that include a nonlinearity due to the frictions in the joints. RIP is the most convenient example to understand the influence of the frictions on the dynamics of the motion systems. In this paper, an adaptive friction coefficients estimation method was developed to estimate the frictions in three pendulums joints of a Rotary Triple Inverted Pendulums (RTIP) and compared with existing friction estimation models in the literature such as Non-conservative, Linear, and Non-Linear friction models. Joint accelerations were classified into three groups such as low, medium and high. The adaptive friction coefficients were optimized based on this classification of acceleration. Based on the position RMSEs obtained from each joint friction model, the adaptive friction estimation method was much better than the existing friction estimation models in the literature. Among the friction estimation models, the best results were produced by Adaptive Non-linear Friction model.
旋转倒立摆(RIP)是一种由关节摩擦引起的非线性机电系统。RIP是理解摩擦对运动系统动力学影响的最方便的例子。本文提出了一种自适应摩擦系数估计方法,对旋转三倒立摆(RTIP)的三个摆关节进行摩擦估计,并与文献中已有的非保守、线性和非线性摩擦估计模型进行了比较。关节加速度分为低、中、高三组。在此基础上对自适应摩擦系数进行了优化。基于各关节摩擦模型得到的位置均方根值,自适应摩擦估计方法明显优于文献中已有的摩擦估计模型。在各种摩擦估计模型中,自适应非线性摩擦模型的效果最好。
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引用次数: 5
HOSIDF-based Chebyshev Structured Compensator Design for Disturbance Attenuation Problem 基于hosidf的Chebyshev结构补偿器的干扰抑制设计
Muhammed Ali Nur Oz, Bilal Erol, L. Ucun
Disturbance attenuation problem is considered as an important topic in control literature. This paper deals with the design of HOSIDF (Higher Order Sinusoidal Input Describing Functions) based Chebyshev structured compensator in order to increase the disturbance attenuation performance of the system involving actuator saturation. This study consists of the proposed compensator design in addition to ℋ∞ dynamic output feedback controller that already exists in the system. The simulation studies are carried out with an active suspension system which is known as a benchmark problem in control literature. The improvement in disturbance attenuation performance of the closed loop system involving HOSIDF-based compensator is illustrated with time-domain and harmonic plots.
干扰衰减问题被认为是控制文献中的一个重要课题。本文研究了基于高阶正弦输入描述函数(HOSIDF)的切比雪夫结构补偿器的设计,以提高系统在执行器饱和时的干扰衰减性能。本研究包括所提出的补偿器设计,以及系统中已有的h∞动态输出反馈控制器。仿真研究以主动悬架系统为例,该系统在控制文献中被称为基准问题。用时域和谐波图说明了采用基于hosidf补偿器的闭环系统对扰动衰减性能的改善。
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引用次数: 0
Demand Forecasting for Domestic Air Transportation in Turkey using Artificial Neural Networks 基于人工神经网络的土耳其国内航空运输需求预测
Ismail Koc, E. Arslan
Nowadays, the competition between companies is rapidly increasing in every industry. This leads to companies trying to be prepared for the near future by forecasting business conditions. The estimated success rate in this context directly affects the success rate of the companies. Airline transport in Turkey, which has grown at a higher rate than Europe's, is an important part of the country's economy and transportation infrastructure. Furthermore, airports encourage development by motivating the commercial activities around them. In the competitive environment of airline transportation, successful forecasting is a crucial issue. Different methods such as multiple linear regression analysis, back-propagation neural networks (BPN), gravity models, multimode models, time series models are used in forecasting studies. In this study, an Artificial Neural Network (ANN) model is used for demand forecasting in domestic air transport in Turkey. In the scope of this study, AzureML, RScript and MATLAB were used for the dataset that is gained between 01.01.2007 - 01.11.2015 and some successful results were obtained. Pearson's correlation coefficient is used as the performance criteria for evaluation and it is observed that the results obtained from the proposed model are at an acceptable level which are gained between 0,79 and 0,93. Therefore, the proposed Artificial Neural Network (ANN) model can be used as a demand forecasting in many areas such as capacity planning, airport infrastructure planning, airplane investments in air transportation.
如今,每个行业公司之间的竞争都在迅速加剧。这导致公司试图通过预测商业状况来为不久的将来做好准备。在这种情况下,估计的成功率直接影响到公司的成功率。土耳其的航空运输增长速度高于欧洲,是该国经济和交通基础设施的重要组成部分。此外,机场通过推动周围的商业活动来鼓励发展。在竞争激烈的航空运输环境中,成功的预测是一个至关重要的问题。预测方法包括多元线性回归分析、反向传播神经网络(BPN)、重力模型、多模态模型、时间序列模型等。本研究采用人工神经网络(ANN)模型对土耳其国内航空运输需求进行预测。在本研究范围内,对2007年1月1日至2015年11月1日期间获得的数据集使用了AzureML、RScript和MATLAB,并获得了一些成功的结果。使用Pearson相关系数作为评价的性能标准,观察到从所提出的模型获得的结果在0.79和0.93之间处于可接受的水平。因此,本文提出的人工神经网络(ANN)模型可用于容量规划、机场基础设施规划、航空运输中的飞机投资等领域的需求预测。
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引用次数: 5
Performance Evaluation of Dynamic HUB Selection Algorithm for WBAN 无线宽带网络动态集线器选择算法的性能评价
Murtaza Cicioğlu, A. Çalhan
Lightweight and low power sensor nodes designed for wireless body area networks (WBANs) are of great importance for being widespread e-health services. IEEE 802.15.6 standard is a new standard defined for the WBANs architecture. The purpose of this standard is to define specific standards for the physical and data link layers of various applications with different service quality requirements. In this study, the default energy consumption approach for the coordinator node of IEEE 802.15.6 standard is tackled, and as a result, a new algorithm is developed for energy consumption.In the traditional approach, the coordinator node is fixed for WBAN architecture. With the proposed algorithm the coordinator node is dynamically selected. This algorithm called dynamic HUB (or coordinator) selection (DHS) is performed with Riverbed Modeler simulation software with sample scenarios and the performance results are examined. Consequently, the coordinator node energy consumption level is reduced and the network lifetime of the architecture is extended significantly.
为无线体域网络(wban)设计的轻量化、低功耗传感器节点对于普及电子医疗服务具有重要意义。IEEE 802.15.6标准是针对wban架构定义的新标准。本标准的目的是为具有不同服务质量要求的各种应用的物理层和数据链路层定义具体的标准。本研究针对IEEE 802.15.6标准中协调器节点的默认能耗方法,开发了一种新的能耗算法。在传统的方法中,WBAN架构的协调器节点是固定的。该算法动态选择协调节点。该算法被称为动态HUB(或协调器)选择(DHS),并在Riverbed Modeler仿真软件中通过示例场景进行了执行,并对性能结果进行了检验。从而降低了协调器节点的能耗水平,并显著延长了该体系结构的网络生命周期。
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引用次数: 5
期刊
2018 6th International Conference on Control Engineering & Information Technology (CEIT)
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