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2018 5th International Conference on Electrical Engineering, Computer Science and Informatics (EECSI)最新文献

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Analysis on Customer Satisfaction Dimensions in Peer-to-Peer Accommodation using Latent Dirichlet Allocation: A Case Study of Airbnb 基于潜在狄利克雷分配的点对点住宿顾客满意度维度分析——以Airbnb为例
Kevin Situmorang, A. Hidayanto, A. Wicaksono, A. Yuliawati
Customer satisfaction becomes a key influencer for people’s habits or daily activities. One of the examples is in the decision-making process about whether they will use specific products or services. People often need other’s review or rating about what they are going to use or consume. In this research, by using customer’s online review that available from Airbnb website, we try to extract what are the most talked factors about peer-to-peer accommodation, and how customer sentiment about them. We use Latent Dirichlet Allocation (LDA) to extract that factors and conduct sentiment analysis by utilizing semantic analyzer from Google Cloud NLP. We analyze which factors that has more effect on customer satisfaction, not only in general but more specific based on customer gender and tourism destination object. The result shows that factors related to social benefit and service quality have impact on customer satisfaction, moreover different customer gender and different tourism object destination bring different sentiment among customer. We also find several factors that can be improved by the owner of the accommodation to improve customer satisfaction toward their services.
顾客满意度成为影响人们习惯或日常活动的关键因素。其中一个例子是在决策过程中,他们是否会使用特定的产品或服务。人们经常需要别人对他们将要使用或消费的东西进行评论或评级。在本研究中,通过使用Airbnb网站上的客户在线评论,我们试图提取关于点对点住宿最常被谈论的因素,以及客户对这些因素的看法。我们使用潜在狄利克雷分配(Latent Dirichlet Allocation, LDA)来提取这些因素,并利用谷歌Cloud NLP的语义分析器进行情感分析。我们分析了哪些因素对顾客满意度的影响更大,不仅是一般的,而且更具体地基于顾客性别和旅游目的地对象。结果表明,社会效益和服务质量等相关因素对顾客满意度有影响,而且不同的顾客性别和不同的旅游对象目的地会带来不同的顾客情绪。我们还发现酒店业主可以改善的几个因素,以提高顾客对其服务的满意度。
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引用次数: 5
Application of Ultra-Wideband Double Layer Printed Antenna for Partial Discharge Detection 超宽带双层印刷天线在局部放电检测中的应用
Y. M. Hamdani, U. Khayam
Partial discharge (PD) is a local electrification phenomenon that partially connects insulation between the conductors and occurs either on the surface of the conductor or inside the insulation (void). During the PD there are several phenomena that accompany the occurrence of PD, such as impulse currents, heat radiation, electromagnetic waves, mechanical waves and chemical processes. This phenomenon is detected and measured to know the existence of PD. One of the PD measurements is ultra high frequency (UHF) method, by measuring the waves generated by PD using antenna. One of antenna having good characteristics is UWB double layer printed antenna. In this paper the application of ultra-wideband double layer printed antenna for partial discharge detection is reported. The application of antenna on PD measurement, shows that the antenna is able to detect PD. The characteristics of PD: PDIV, PDEV, PD waveform are measured using this antenna. Ultra-wideband (UWB) double layer printed antenna is an antenna developed from a square microstrip antenna with symmetrical T-shaped tethering. The proposed antenna is implemented on Epoxy FR-4 substrate with permittivity of 4.3, thickness of 1.6mm, and 72.8mm x 60.0mm in size. The VNA testing of the antenna shows that the antenna bandwidth is from 50MHz to 2.30GHz. The measured results of PD wave are PDIV, PD waveform and PDEV.
局部放电(PD)是一种局部带电现象,它使导体之间的绝缘部分接通,发生在导体表面或绝缘(空隙)内部。在PD过程中,伴随PD发生的现象有脉冲电流、热辐射、电磁波、机械波和化学过程等。对这种现象进行检测和测量,以了解PD的存在。超高频(UHF)法是局部放电测量的一种方法,利用天线测量局部放电产生的波。超宽带双层印刷天线是一种具有良好性能的天线。本文报道了超宽带双层印刷天线在局部放电检测中的应用。该天线在局部放电测量中的应用表明,该天线能够检测到局部放电。利用该天线测量了PD的特性:PDIV、PDEV、PD波形。超宽带(UWB)双层印刷天线是由对称t型系带的方形微带天线发展而来的天线。该天线采用介电常数为4.3、厚度为1.6mm、尺寸为72.8mm x 60.0mm的环氧FR-4基板实现。天线VNA测试表明,天线带宽在50MHz ~ 2.30GHz之间。PD波的测量结果为PDIV、PD波形和PDEV。
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引用次数: 4
A New Algorithm for Designing the Parameter of Damped-Type Double Tuned Filter 阻尼型双调谐滤波器参数设计的新算法
Haposan Yoga, Pradika Napitupulu, C. G. Irianto
Due to harmonics problems generated by converter devices. Currently, passive filter has been widely used in suppressing harmonics distortion. Passive filter which mostly used is double tuned filter. However, double tuned filter doesn't have a damping resistor which can prevent network elements from exposing to harsh condition such as when the system reactance and the filter impedance are conjugated, this condition can cause severe overvoltage harmonics on the filter and other power system components. There is a new configuration of double tuned filter that has damping resistor, called damped-type double tuned filter. Aiming at the question of parameter of damped-type double tuned filter, a new algorithm for designing the parameter of damped-type double tuned filter is proposed based on the relationship between impedance of two single tuned filter and one double tuned filter, and also based on the resonance at tuned frequency one and tuned frequency two are close to zero. Simulation result from MATLAB shows that the impedance of damped-type double tuned filter designed with this algorithm is appropriate. In addition, the simulation result from PSIM shows that damped-type double tuned filter designed with this algorithm works well.
由于变换器装置产生的谐波问题。目前,无源滤波器在抑制谐波失真方面得到了广泛的应用。无源滤波器主要是双调谐滤波器。然而,双调谐滤波器没有阻尼电阻,阻尼电阻可以防止网络元件暴露在恶劣的条件下,例如当系统电抗和滤波器阻抗共轭时,这种情况可能导致滤波器和其他电力系统组件上出现严重的过压谐波。有一种新型的带阻尼电阻的双调谐滤波器,称为阻尼型双调谐滤波器。针对阻尼型双调谐滤波器的参数问题,基于两个单调谐滤波器和一个双调谐滤波器的阻抗关系,以及调谐频率1和调谐频率2处的谐振接近于零,提出了一种设计阻尼型双调谐滤波器参数的新算法。MATLAB仿真结果表明,采用该算法设计的阻尼型双调谐滤波器阻抗合理。此外,PSIM的仿真结果表明,采用该算法设计的阻尼型双调谐滤波器效果良好。
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引用次数: 5
Simulation of Mobile LoRa Gateway for Smart Electricity Meter 面向智能电表的移动LoRa网关仿真
S. Sugianto, Azwar Al Anhar, R. Harwahyu, R. F. Sari
LoRa is a viable connectivity technology for smart electricity meter. In addition to measuring electricity usage, a smart electricity meter enables many features for smart grid, safety, etc. LoRa is advertised to be capable in very long range transmission and low power consumption. However, LoRa uses sub 1 GHz unlicensed spectrum. In the era of connected smart things, this spectrum is very crowded and will be even more crowded. In this paper we propose the use of mobile LoRa gateway for smart electricity meter. With mobile LoRa gateway, the transmission range can be decreased. Thus, LoRa end devices can save more power and nearby systems can reuse the same band with less interference. We study the performance via simulation using modified LoRaSim. The result shows that the performance of LoRa mobile gateway can be achieved.
LoRa是一种可行的智能电表连接技术。除了测量用电量外,智能电表还可以为智能电网、安全等提供许多功能。LoRa被宣传为具有极远距离传输和低功耗的能力。但是,LoRa使用低于1ghz的未经许可频谱。在智能物联网时代,这个频谱非常拥挤,而且会更加拥挤。本文提出将移动LoRa网关应用于智能电表。使用移动LoRa网关可以减小传输距离。因此,LoRa终端设备可以节省更多的功率,附近的系统可以重复使用相同的频段,干扰更少。利用改进的LoRaSim进行仿真研究。结果表明,该方案可以达到LoRa移动网关的性能要求。
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引用次数: 3
Sensorless PMSM Control using Fifth Order EKF in Electric Vehicle Application 基于五阶EKF的无传感器PMSM控制在电动汽车中的应用
Nanda Avianto Wicaksono, Bernadeta Wuri Harini, F. Yusivar
This paper is intended to design a controller and an observer of a sensorless PMSM (permanent magnet synchronous motor) in electric vehicle application. The controller uses the field orientation control (FOC) method and the observer type is the fifth order extended Kalman filter (EKF). The designed controller and observer are tested by varying the elevation angle of the route that is several times abruptly changed. The simulation result shows that the designed controller and observer can respond to the elevation angles given.
本文设计了一种用于电动汽车的无传感器永磁同步电机控制器和观测器。控制器采用场定向控制(FOC)方法,观测器类型为五阶扩展卡尔曼滤波器(EKF)。通过改变多次突变的航路的俯仰角,对所设计的控制器和观测器进行了测试。仿真结果表明,所设计的控制器和观测器能够对给定的俯仰角做出响应。
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引用次数: 2
Sarcasm Detection on Indonesian Twitter Feeds 印尼Twitter feed的讽刺检测
Dwi A. P. Rahayu, Soveatin Kuntur, Nur Hayatin
In social media, some people use positive words to express negative opinion on a topic which is known as sarcasm. The existence of sarcasm becomes special because it is hard to be detected using simple sentiment analysis technique. Research on sarcasm detection in Indonesia is still very limited. Therefore, this research proposes a technique in detecting sarcasm in Indonesian Twitter feeds particularly on several critical issues such as politics, public figure and tourism. Our proposed technique uses two feature extraction methods namely interjection and punctuation. These methods are later used in two different weighting and classification algorithms. The empirical results demonstrate that combination of feature extraction methods, tf-idf, k-Nearest Neighbor yields the best performance in detecting sarcasm.
在社交媒体上,一些人使用积极的词汇来表达对某个话题的负面看法,这被称为讽刺。讽刺的存在变得特殊,因为用简单的情感分析技术很难检测到。印尼对讽刺语检测的研究还很有限。因此,本研究提出了一种技术来检测印尼Twitter feed中的讽刺,特别是在政治、公众人物和旅游等几个关键问题上。我们提出的技术采用了两种特征提取方法,即叹号和标点符号。这些方法随后被用于两种不同的加权和分类算法中。实证结果表明,结合特征提取方法、tf-idf、k-最近邻在讽刺检测中表现最佳。
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引用次数: 10
Sentiment Analysis to Measure Celebrity Endorsment’s Effect using Support Vector Machine Algorithm 基于支持向量机算法的名人代言效应情感分析
Fransiska Pinem, R. Andreswari, M. A. Hasibuan
Celebrity endorsement is a phenomenon in which companies advertises their products by using celebrity services, and celebrities take advantage of their popularity to promote a brand or product of the company through social media. In this study, KFC did a celebrity endorsement to make their menu more popular. KFC choose to work with Raditya Dika to promote their latest menu, KFC Salted Egg Chicken. This study will examine whether in such cases there is a change in public sentiment towards the product after the celebrity endorsement. It can be done using text mining and sentiment analysis. There are several algorithms that can be used to perform sentiment analysis, one of them is Support Vector Machine. Support Vector Machine (SVM) was chosen because this method is quite accurate in various studies. SVM also takes into account various features of the document, including features that often do not appear on the document, so it can reduce the loss of information from the data. The data used in this research are taken from YouTube and Twitter comment about KFC Salted Egg Chicken. Several step was done in this sentiment analysis research, that are preprocessing text, feature extraction, classification, and evaluation. The result model is tested and evaluated before and after endorsement by looking at the value of accuracy, precision, recall, and f1-measure. The test result of accuracy, precision, recall, and f-measure before endorsement were 67,83%, 69%, 68%, and 66%. After the endorsement, the test results were 74.06%, 74%, 74%, and 74% respectively. The results of this study indicate that SVM has an accurate measurement in sentiment analysis studies. Moreover, this study found that there was not significant change in public sentiment regarding the product before and after the celebrity endorsement.
名人代言是指企业利用名人服务为自己的产品做广告,名人利用自己的知名度,通过社交媒体宣传公司的品牌或产品的现象。在这项研究中,肯德基做了一个名人代言,使他们的菜单更受欢迎。肯德基选择与Raditya Dika合作来推广他们的最新菜单——肯德基咸蛋鸡。这项研究将检验在这种情况下,名人代言后公众对产品的情绪是否会发生变化。它可以通过文本挖掘和情感分析来完成。有几种算法可用于执行情感分析,其中之一是支持向量机。之所以选择支持向量机(SVM),是因为该方法在各种研究中都具有较高的准确性。SVM还考虑了文档的各种特征,包括那些通常不会出现在文档上的特征,因此可以减少数据中信息的丢失。本研究中使用的数据来自YouTube和Twitter上关于肯德基咸蛋鸡的评论。在情感分析研究中,主要完成了文本预处理、特征提取、分类和评价等步骤。通过查看准确性、精度、召回率和f1-measure的值,在背书前后对结果模型进行测试和评估。正确率、精密度、召回率和认可前f-measure的检验结果分别为67.83%、69%、68%和66%。背书后,测试结果分别为74.06%、74%、74%、74%。本研究的结果表明,支持向量机在情感分析研究中具有准确的度量方法。此外,本研究发现,在名人代言前后,公众对该产品的情绪没有显著变化。
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引用次数: 2
Narrow Window Feature Extraction for EEG-Motor Imagery Classification using k-NN and Voting Scheme 基于k-NN和投票方案的脑电运动图像分类窄窗特征提取
A. Wijaya, T. B. Adji, Noor Akhmad Setiawan
Achieving consistent accuracy still big challenge in EEG based Motor Imagery classification since the nature of EEG signal is non-stationary, intra-subject and inter-subject dependent. To address this problems, we propose the feature extraction scheme employing statistical measurements in narrow window with channel instantiation approach. In this study, k-Nearest Neighbor is used and a voting scheme as final decision where the most detection in certain class will be a winner. In this channel instantiation scheme, where EEG channel become instance or record, seventeen EEG channels with motor related activity is used to reduce from 118 channels. We investigate five narrow windows combination in the proposed methods, i.e.: one, two, three, four and five windows. BCI competition III Dataset IVa is used to evaluate our proposed methods. Experimental results show that one window with all channel and a combination of five windows with reduced channel outperform all prior research with highest accuracy and lowest standard deviation. This results indicate that our proposed methods achieve consistent accuracy and promising for reliable BCI systems.
由于脑电信号具有非平稳性、主体内依赖性和主体间依赖性的特点,在基于脑电信号的运动意象分类中,实现一致的准确率仍然是一个很大的挑战。为了解决这一问题,我们提出了基于信道实例化方法的窄窗口统计测量特征提取方案。在本研究中,使用k近邻和投票方案作为最终决定,在某个类别中检测最多的将成为获胜者。在将脑电信号通道实例化或记录化的通道实例化方案中,将118个通道减少到17个具有运动相关活动的脑电信号通道。我们在提出的方法中研究了五种窄窗组合,即:一、二、三、四和五窗。BCI竞赛III数据集IVa用于评估我们提出的方法。实验结果表明,一窗全通道和五窗减少通道的组合以最高的精度和最低的标准差优于所有先前的研究。结果表明,我们提出的方法具有一致的精度,有望用于可靠的BCI系统。
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引用次数: 2
Artificial Neural Network Parameter Tuning Framework For Heart Disease Classification 用于心脏病分类的人工神经网络参数整定框架
M. H. Abu Yazid, Muhammad Haikal Satria, Shukor Talib, Novi Azman
Heart Disease are among the leading cause of death worldwide. The application of artificial neural network as decision support tool for heart disease detection. However, artificial neural network required multitude of parameter setting in order to find the optimum parameter setting that produce the best performance. This paper proposed the parameter tuning framework for artificial neural network. Statlog heart disease dataset and Cleveland heart disease dataset is used to evaluate the performance of the proposed framework. The results show that the proposed framework able to produce high classification accuracy where the overall classification accuracy for Cleveland dataset is 90.9% and 90% for Statlog dataset.
心脏病是世界上导致死亡的主要原因之一。人工神经网络作为心脏病检测决策支持工具的应用。然而,人工神经网络需要大量的参数设置,才能找到产生最佳性能的最优参数设置。提出了人工神经网络的参数整定框架。使用Statlog心脏病数据集和Cleveland心脏病数据集来评估所提出框架的性能。结果表明,所提出的框架能够产生较高的分类精度,其中Cleveland数据集的总体分类精度为90.9%,Statlog数据集的总体分类精度为90%。
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引用次数: 15
Comparison of LFC Optimization on Micro-hydro using PID, CES, and SMES based Firefly Algorithm 基于PID、CES和SMES的萤火虫算法在微水电LFC优化中的比较
Kadaryono, Rukslin, Machrus Ali, Askan, A. Parwanti, Iwan Cahyono
Micro-hydro gets potential energy from water flow that has a certain height difference. Potential energy is strongly influenced by high water fall. Potential energy through pipes, incoming turbines converted into kinetic energy. The kinetic energy of the turbine coupled with the generator is converted into electrical energy. Some components used for micro-hydro power generation, among others; intake, settling basin, headrace, penstock, turbine, draft tube, generator, and control panel. Water flows through the pipe into the turbine house so it can rotate the turbine blades. Turbine rotation is used to rotate a generator at the micro hydro generator. The most common problem with micro-hydro generating systems is inconsistent generator rotation caused by changes in connected loads. Load changes can cause system frequency fluctuations and may cause damage to electrical equipment. Artificial Intelligence (AI) is used to obtain the right constants to obtain the best optimization. In this study compare the control method, namely; Proportional Integral Derivatives (PID), Capacitive Energy Storage (CES), and Superconducting Magnetic Energy Storage (SMES). This study also compared the method of artificial intelligence between Particle Swarm Optimization (PSO) method has been studied with the method of Firefly Algorithm (FA). Overall this study compares 11 methods, namely methods; uncontrolled, PID-PSO method, PID-FA method, CES-PSO method, CES-FA method, SMES-PSO method, SMES-FA method, PID-CES-PSO method, PID-CES-FA method, PID-SMES - PSO, and PID-SMES-FA method. The results of the simulation showed that from the 11 methods studied, it was found that the PID-CES-FA method has the smallest undershot value, ie -7.774e-03 pu, the smallest overshoot value, which is 4.482e-05 pu, and the fastest completion time is 7.11 s. These results indicate that the smallest frequency fluctuations are found in the PID-CES-FA controller. Thus it is stated that the PID-CES-FA method is the best method used in the previous method. This research will use other methods to get the best controller.
微水力从具有一定高差的水流中获取势能。位能受到高落差的强烈影响。势能通过管道,传入涡轮转化为动能。涡轮与发电机耦合的动能转化为电能。用于微型水力发电的一些部件;进气,沉降池,引水,压力管,涡轮,尾水管,发电机和控制面板。水通过管道流入涡轮室,这样就可以转动涡轮叶片。水轮旋转用于在微型水轮发电机上旋转发电机。微型水力发电系统最常见的问题是由于连接负荷的变化引起的发电机旋转不一致。负载变化会引起系统频率波动,并可能对电气设备造成损坏。人工智能(AI)用于获得正确的常数以获得最佳优化。在本研究中比较控制方法,即;比例积分导数(PID),电容储能(CES)和超导磁能储能(SMES)。本研究还比较了人工智能中粒子群优化(PSO)方法与萤火虫算法(FA)方法之间的关系。总体而言,本研究比较了11种方法,即方法;非受控、PID-PSO法、PID-FA法、CES-PSO法、CES-FA法、sme -PSO法、sme - fa法、PID-CES-PSO法、PID-CES-FA法、PID-SMES- PSO法、PID-SMES- PSO法、pid - sme - fa法。仿真结果表明,在所研究的11种方法中,PID-CES-FA方法的下冲值最小,为-7.774e-03 pu,超调值最小,为4.4820 -05 pu,最快完成时间为7.11 s。结果表明,PID-CES-FA控制器的频率波动最小。因此,PID-CES-FA法是上述方法中最好的方法。本研究将采用其他方法获得最佳控制器。
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引用次数: 7
期刊
2018 5th International Conference on Electrical Engineering, Computer Science and Informatics (EECSI)
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