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2020 IEEE REGION 10 CONFERENCE (TENCON)最新文献

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Optimal Control and Placement of Step Voltage Regulator for Voltage Unbalance Improvement and Loss Minimization in Distribution System 为改善配电系统电压不平衡和减少损耗,阶跃调压器的最优控制与配置
Pub Date : 2020-11-16 DOI: 10.1109/TENCON50793.2020.9293721
Akito Nakadomari, Ryuto Shigenobu, T. Senjyu
This paper describes optimal voltage control and optimal placement of the three-phase individual step voltage regulator (3ϕSVR) considering voltage unbalance improvement. As a result of active efforts to promote renewable energy, there is a concern that voltage unbalance will increase due to an increase in distributed power sources. Therefore, this paper proposes the optimal control and placement method for 3ϕSVR for voltage unbalance improvement and loss minimization. Simulations verified that all the voltage unbalanced indices satisfied the constraint value and the objective function improved. These results confirmed that the effectiveness of the optimal control and placement method for 3ϕSVR.
本文介绍了考虑改善电压不平衡的三相阶跃电压调节器(3 svr)的最优电压控制和最优放置。由于积极推广可再生能源,人们担心由于分布式电源的增加,电压不平衡会增加。因此,本文提出了改善电压不平衡和最小化损耗的3ϕSVR最优控制和放置方法。仿真结果表明,各电压不平衡指标均满足约束值,目标函数得到了改进。这些结果证实了最优控制和放置方法对3ϕSVR的有效性。
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引用次数: 2
A Maximum Entropy Approach for Mapping Falcata Plantations in Sentinel-2 Imagery 基于Sentinel-2影像的Falcata人工林最大熵映射方法
Pub Date : 2020-11-16 DOI: 10.1109/TENCON50793.2020.9293693
Marcia Coleen N. Marcial, J. R. Santillan
Mapping tree species is essential for monitoring, planning, and better managing industrial tree plantations (ITP). Due to the intensive procedure of field sampling and multi-class manual training data collection for image classification, an approach that allows fewer data would be efficient. This study evaluated the performance of a one-class classifier called Maximum Entropy (MaxEnt) for mapping Falcata (Paraserianthes falcataria) in Sentinel-2 imagery. Two MaxEnt parameters were tested, namely sample size and binary threshold. Using a default threshold of 0.5, MaxEnt can provide classification accuracies ranging from 89.41-92.84% using sample sizes as small as 30 and as high as 500. A 0.3 binary threshold applied to MaxEnt logistic output with 500 samples were the best parameter values for classifying Falcata using Sentinel-2 imagery.
绘制树种分布图对于监测、规划和更好地管理工业人工林(ITP)至关重要。由于图像分类需要大量的现场采样和多类人工训练数据的收集,因此允许较少数据的方法将是有效的。本研究评估了一种称为最大熵(MaxEnt)的单类分类器在Sentinel-2图像中绘制Falcata (Paraserianthes falcataria)的性能。测试了两个MaxEnt参数,即样本量和二值阈值。使用默认阈值0.5,MaxEnt可以提供89.41-92.84%的分类准确率,样本大小可以小至30,大至500。使用Sentinel-2图像对500个样本的MaxEnt logistic输出应用0.3的二值阈值是对Falcata进行分类的最佳参数值。
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引用次数: 0
Simulation of A Reconfigurable Spherical Robot IV for Confined Environment 受限环境下可重构球形机器人的仿真
Pub Date : 2020-11-16 DOI: 10.1109/TENCON50793.2020.9293694
Natthaphon Bunathuek, Pudit Laksanacharoen
This work presents simulation of a Reconfigurable Spherical Robot IV for confined environment. The robot is a spherical shape with three legs kept inside spherical shell. Each leg has four degrees of freedom. All three legs can be extended for two types of locomotion such as legged locomotion and rolling sphere. A number of simulation has been done in steering in a wide and small radius of turning, rolling forward motion, and walking breaststroke concept. The simulation results show a promising concept of this new robot.
本文介绍了一种可重构球面机器人IV在受限环境下的仿真。机器人呈球形,三条腿嵌在球形外壳内。每条腿有四个自由度。所有三条腿都可以进行两种类型的运动,如腿式运动和滚动球体。大量的仿真已经完成了转向在一个宽和小半径的转弯,滚动向前运动,和步行蛙泳的概念。仿真结果表明,该机器人具有良好的设计理念。
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引用次数: 0
An Improved Triple Interline DC Power Flow Controller for Bidirectional Power Control 一种用于双向功率控制的改进型三线间直流潮流控制器
Pub Date : 2020-11-16 DOI: 10.1109/TENCON50793.2020.9293704
Jing Yi, Miao Zhu, Xu Zhong, Han Wang, X. Cai
For the operational safety and stability of electrical system, effective power flow control in meshed high voltage direct current (HVDC) grids makes sense. In order to realize the objective of controlling several lines simultaneously and independently in a convenient way, interline dc power flow controller (IDCPFC) has been introduced. To cover some shortages of present IDCPFC topologies, an improved triple interline dc power flow controller (TI-DCPFC), capable of controlling power flow of two lines actively, has been proposed in this paper. To explain it thoroughly and explicitly, its operational principle is illustrated combined with the mathematic equations firstly. Then, to validate its capacity of dealing with occasions of bidirectional flows and the dual-freedom control function, the theoretical control strategy and simulation results in a typical working mode are referred to comprehensively.
为了保证电力系统的安全稳定运行,有效控制并网高压直流电网的潮流具有重要意义。为了方便地实现对多条线路同时独立控制的目的,引入了线间直流潮流控制器(IDCPFC)。为了弥补现有IDCPFC拓扑结构的不足,本文提出了一种改进的三线间直流潮流控制器(TI-DCPFC),能够主动控制两条线路的潮流。首先结合数学方程对其工作原理进行了阐述,以便对其进行全面、清晰的解释。然后,为了验证其处理双向流动场合的能力和双自由度控制功能,综合参考了理论控制策略和典型工作模式下的仿真结果。
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引用次数: 6
Assessment of Heavy Metal Concentration in Soil Using Remotely Sensed Data 基于遥感数据的土壤重金属浓度评价
Pub Date : 2020-11-16 DOI: 10.1109/TENCON50793.2020.9293807
Maria Belinda D. Campana, L. C. S. Asube, M. Japitana
Remote Sensing has been used nowadays for environmental monitoring as it offers a faster and less expensive way of monitoring the environment. With various activities conducted around the Tubay catchment (e.g., mining, agriculture), monitoring the quality of its soil by determining the heavy metal concentration (HMC) in soil, mainly its Lead (Pb) content, became the main objective of this study. Remote sensing technologies, together with field data, are used in this study to create a model that would predict the lead content of the soil in Tubay catchment through statistical analysis. The model created in this study is used in an ArcGIS software. It resulted to a model-predicted value of -263.993 ppm of Lead in minimum, and a model-predicted value of 308.482 ppm of Lead in maximum. Due to the soil test result, which yields a majority of Not Detected values, the model created in this study is not validated.
遥感如今已被用于环境监测,因为它提供了一种更快、更便宜的监测环境的方法。随着Tubay流域周边的各种活动(如采矿、农业)的开展,通过测定土壤中重金属浓度(HMC),主要是铅(Pb)含量来监测其土壤质量成为本研究的主要目的。本研究利用遥感技术结合现场数据,建立了一个通过统计分析预测土贝流域土壤铅含量的模型。本研究建立的模型在ArcGIS软件中得到了应用。结果表明,模型预测值最小值为-263.993 ppm,最大值为308.482 ppm。由于土壤测试结果产生了大部分Not Detected值,因此本研究中创建的模型没有得到验证。
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引用次数: 0
Game-based Learning Tool for Photography 基于游戏的摄影学习工具
Pub Date : 2020-11-16 DOI: 10.1109/TENCON50793.2020.9293834
Napat Romlamduan, Worapan Kusakunniran
Nowadays, it is convenient to gain new knowledge and skills by learning from the internet. However, some contents may be hard to understand just by reading texts. Photography knowledge is one of those, in which learner may need a large amount of time and cost to practice it. Therefore, this paper provides an alternative way of a game-based learning tool. It simulates a camera into a game combining with a story and some challenges of engagement. It is designed such that a photography knowledge can be delivered to learners through this developed game. To validate this assumption, 25 participants are asked to join our experiment. They are asked to do a pre-test, play our game, and do a post-test. Then, they are asked to answer questionnaires regarding effectiveness and benefits of the proposed game. It is shown that the participants could improve their scores from the pre-test of 44% to the post-test of 89%, regarding the understanding of photography knowledge. Also, the questionnaires’ results show that our game could help the participants to gain the knowledge.
如今,通过互联网学习获得新知识和技能很方便。然而,有些内容可能很难通过阅读文本来理解。摄影知识就是其中之一,学习者可能需要大量的时间和成本来练习它。因此,本文提供了一种基于游戏的学习工具的替代方法。它将镜头模拟到游戏中,并结合了故事和一些粘性挑战。它的设计是这样的摄影知识可以通过这个开发的游戏交付给学习者。为了验证这一假设,25名参与者被要求加入我们的实验。他们被要求做一个预测试,玩我们的游戏,并做一个后测试。然后,他们被要求回答关于拟议游戏的有效性和益处的问卷。结果表明,被试对摄影知识的理解从前测的44%提高到后测的89%。此外,问卷调查的结果表明,我们的游戏可以帮助参与者获得知识。
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引用次数: 0
A Ride Sharing System based on An Expansive Search-Based Algorithm 基于扩展搜索算法的拼车系统
Pub Date : 2020-11-16 DOI: 10.1109/TENCON50793.2020.9293943
Josh Angelo Escalona, Benjamin Manalo, Wilbert Jethro R. Limjoco, Carl C. Dizon
Ride sharing is one of the several transportation alternatives used to ease and skip traffic problems worldwide. A platform of interest is GrabShare, where its ride sharing algorithm was empirically found to be simple. However, the algorithm has several limitations, such as it being not truly optimal due to catering to user experiences, and only able to handle up to two bookings. Hence, there is a need to develop a ride sharing system that is scalable, fast, and efficient especially in terms of finding matches and recommending routes. A Modified Search-based Ride Sharing algorithm, which uses an expansion-based method, was developed as a response to these requirements. Results showed that the Modified Search-based Ride Sharing algorithm generally outperforms the empirically-derived GrabShare algorithm in terms of route length, shared route percentage, and processing time. However, GrabShare performs better when there are few passengers in the area while the Modified Search-based Ride Sharing algorithm runs relatively slower when the sources and destinations are far from each other.
拼车是缓解和避免全球交通问题的几种交通方式之一。我们感兴趣的一个平台是GrabShare,根据经验,它的拼车算法很简单。然而,该算法有一些局限性,例如,由于迎合用户体验,它并不是真正的最佳选择,并且最多只能处理两个预订。因此,有必要开发一个可扩展、快速、高效的拼车系统,特别是在寻找匹配和推荐路线方面。针对这些需求,开发了一种改进的基于搜索的拼车算法,该算法使用基于扩展的方法。结果表明,改进的基于搜索的拼车算法在路线长度、共享路线百分比和处理时间方面总体优于经验推导的GrabShare算法。然而,当该地区乘客较少时,GrabShare表现更好,而当源和目的地相距较远时,改进的基于搜索的拼车算法运行相对较慢。
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引用次数: 3
Genetic Algorithm-Based Visible Band Tetrahedron Greenness Index Modeling for Lettuce Biophysical Signature Estimation 基于遗传算法的可见带四面体绿度指数建模莴苣生物物理特征估计
Pub Date : 2020-11-16 DOI: 10.1109/TENCON50793.2020.9293916
Ronnie S. Concepcion, Sandy C. Lauguico, Rogelio Ruzcko Tobias, E. Dadios, A. Bandala, E. Sybingco
Lightness signal and color reflectance constitute the reflected luminance spectra from camera captured image to camera lenses. The intensity of lightness and visible RGB signals deviates as the camera distance to object varies. The presence of uneven distribution of photosynthetic light causes angular light effect of shadowing on the focal object and light emitting objects placed on the visually noisy background added a challenge in materializing an efficient greenness index for crop phenotyping. The proposed method in this study compensates excessive relative brightness on the image by introducing lightness rectification coefficient and employing genetic algorithm to derive a novel visible tetrahedron greenness index (gvTeGI) based on normalized green waveband. Hybrid neighborhood component analysis and Pearson’s correlation coefficient approach for feature selection resulted to retaining photosynthetic canopy area, and correlation and homogeneity texture features as highly important descriptors for biophysical signatures considered in this study which are lettuce fresh weight, height and number of spanning leaves. The selection, crossover and mutation rates used to optimize the genetic algorithm model are 0.2, 0.8 and 0.01 respectively. Indoor and outdoor aquaponic system was deployed for 6-week full crop life cycle cultivation. Regression machine learning models were used to estimate biophysical signatures from extracted gvTeGI channels. Optimized Gaussian processing regression model bested regression support vector machine and regression tree in estimating fresh weight, height and number of spanning leaves with R2 values of 0.7939, 0.7662 and 0.7446. The proposed gvTeGI proved to be more accurate than previously published greenness index for the estimation of biophysical signatures of lettuce using consumer-grade RGB camera.
亮度信号和颜色反射率构成了从相机捕获的图像到相机镜头的反射亮度光谱。亮度和可见RGB信号的强度随相机与物体距离的变化而变化。光合作用光分布不均匀导致焦点物体产生角光效应,而发光物体放置在视觉噪声背景上,为实现高效的作物表型绿度指数增加了挑战。该方法通过引入亮度校正系数,利用遗传算法推导出一种新的基于归一化绿波段的可见四面体绿度指数(gvTeGI),对图像中过多的相对亮度进行补偿。杂交邻域成分分析和Pearson相关系数法在特征选择中保留了光合冠层面积,相关性和均匀性纹理特征是本研究考虑的生菜鲜重、高和跨叶数等生物物理特征的重要描述符。优化遗传算法模型的选择率、交叉率和突变率分别为0.2、0.8和0.01。采用室内和室外水培系统进行为期6周的全生命周期栽培。使用回归机器学习模型估计提取的gvTeGI通道的生物物理特征。优化后的高斯处理回归模型在估算鲜重、高和生成叶数方面优于回归支持向量机和回归树,R2值分别为0.7939、0.7662和0.7446。对于使用消费级RGB相机估计生菜的生物物理特征,所提出的gvTeGI被证明比以前发表的绿色指数更准确。
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引用次数: 12
Prediction of Total Body Water using Scaled Conjugate Gradient Artificial Neural Network 基于尺度共轭梯度人工神经网络的水体总水量预测
Pub Date : 2020-11-16 DOI: 10.1109/TENCON50793.2020.9293804
Marife A. Rosales, Maria Gemel B. Palconit, A. Bandala, R. R. Vicerra, E. Dadios, Hilario A. Calinao
The study aims to design an intelligent total body water measuring device which will help to determine the total body water level or percentage of an individual using ultrasonic sensor, load cell and bioelectric impedance analysis (BIA). The system utilized the Scaled Conjugate Gradient Artificial Neural Network (ANN) as the machine learning algorithm. The system used the dataset splitting of 70%-15%15% for training, validation and testing. Different hidden neurons were used and compared during neural network training and found out that using 10 neurons will provide the lowest mean square error (MSE) with best value of Pearson’s correlation (R). Based on the results, using 10 neurons, Scaled Conjugate Gradient algorithm has better performance as compared to Levenberg-Marquardt algorithm with MSE equal to 0.180033, 0.118954, 0.529157 while the R value is equal to 0.997887, 0.997488, 0.99644 for training, validation and testing.
本研究旨在设计一种智能全身水分测量装置,利用超声波传感器、称重传感器和生物电阻抗分析(BIA)来确定个人的全身水位或百分比。该系统采用缩放共轭梯度人工神经网络(ANN)作为机器学习算法。系统采用70%-15%的数据集分割率进行训练、验证和测试。在神经网络训练过程中,使用不同的隐藏神经元进行对比,发现使用10个神经元可以获得最小的均方误差(MSE)和最佳的Pearson’s correlation (R)值。基于结果,使用10个神经元的Scaled Conjugate Gradient算法比Levenberg-Marquardt算法(MSE分别为0.180033、0.118954、0.529157,R值分别为0.997887、0.997488、0.99644)在训练、验证和测试中表现更好。
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引用次数: 5
Device-to-Device Communication in Terahertz Frequency Band: Enhancement of Energy Efficiency 太赫兹频段的设备对设备通信:提高能源效率
Pub Date : 2020-11-16 DOI: 10.1109/TENCON50793.2020.9293736
Nafisa Azad Tultul, Subrin Farha, S. S. Hossain, Md. Akbar Hossain, S. R. Sabuj
The increasing demand for higher data rates pushes the boundaries of the currently used radio spectrum. The terahertz (THz) frequency band (0.1-10 THz) is widely considered by scientific community to address spectrum scarcity. In this paper we developed a theoretical model for device-to-device (D2D) communication operating in THz band. We also derived a close form formula of data rates, outage probability, and energy efficiency. Our simulation results show an improvement of data rates and energy efficiency while decreasing the outage probability of D2D communication in THz. For instance, there is 86% of increase in energy efficiency when the transmission power is 19dBm. Finally, the improvement of energy efficiency is 87% using optimal transmission power due to 50 resource blocks.
对更高数据速率的日益增长的需求推动了当前使用的无线电频谱的边界。太赫兹(THz)频段(0.1-10太赫兹)被科学界广泛认为是解决频谱稀缺问题的方法。本文建立了太赫兹波段器件对器件(D2D)通信的理论模型。我们还推导了数据速率、中断概率和能源效率的近似公式。仿真结果表明,该方法在降低太赫兹D2D通信中断概率的同时,提高了数据速率和能源效率。例如,当传输功率为19dBm时,能源效率提高了86%。最后,利用50个资源块的最优传输功率,能源效率提高了87%。
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引用次数: 3
期刊
2020 IEEE REGION 10 CONFERENCE (TENCON)
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