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2018 International Seminar on Intelligent Technology and Its Applications (ISITIA)最新文献

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Four-leg Voltage Source Inverter for Voltage and Current Balancing of Distribution Transformer with Distributed Generations 分布式代配电变压器电压电流平衡用四腿电压源逆变器
Pub Date : 2018-08-01 DOI: 10.1109/ISITIA.2018.8710890
D. Setiawan, H. Suryoatmojo, M. Ashari
This paper is dealing with innovative control strategy of a four-leg voltage source inverter (FLVSI) which is implemented in unbalanced condition. The proposed method is aimed to maintain the balancing of voltage and current distribution system due to unbalance capacity of DG connection and unbalanced load. These unbalance condition can affect the transformer performance which is essentially designed to supply a balanced voltage. For solving the problem, the unbalance voltage and current transformer signals are decomposed to its symmetrical components: positive, negative, and zero sequence. Each results of the decomposition are transformed into a synchronous reference frame (dq coordinate) and controlled by ANFIS controller. Based on the simulation results with Matlab/Simulink, current unbalance of transformer is decreased from 48.44% to 15.15% and voltage unbalance is decreased from 5.09% to 2.46%.
本文研究了在不平衡条件下实现的四支路电压源逆变器的创新控制策略。该方法的目的是为了在DG接线容量不平衡和负载不平衡的情况下保持配电系统的电压和电流的平衡。这些不平衡状况会影响变压器的性能,而变压器本质上是为了提供平衡电压而设计的。为了解决这一问题,将不平衡电压电流互感器信号分解为其对称分量:正、负、零序。每个分解结果都转换成一个同步参考系(dq坐标),并由ANFIS控制器控制。基于Matlab/Simulink仿真结果,变压器电流不平衡从48.44%降低到15.15%,电压不平衡从5.09%降低到2.46%。
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引用次数: 2
Fault Location and Voltage Sag Analysis in Electric Distribution Network 配电网故障定位与电压暂降分析
Pub Date : 2018-08-01 DOI: 10.1109/ISITIA.2018.8710799
Wildan Arif Febrianto, Indrawan Gunartono, O. Penangsang, R. S. Wibowo
Fault in the power distribution system causes protection system tripped and the electrical supply disturbed. The electrical fault occurred by lightning, strong wind, wood cutting, then the aging and an inadequate network component maintenance. It certainly leads to the poor power quality and voltage sag as well. An assessment power quality is an essential thing for utility and the energy supplier to identify and fix a critical area up. The fault location program has an important role in short-term planning operation of electric distribution network to reduce downtime and improve system reliability. A network modelling and faults simulation has been done to obtain voltage sag and current information. Then, the voltage sag at measurement point will be purposed to identify and classify a fault by using K-Means Clustering. Fault location estimation used by technician to repair electrical supply in real system, Kupang substation.
配电系统故障引起保护系统跳闸,供电系统受到干扰。电气故障是由雷电、强风、木材切割引起的,然后是老化和网络部件维护不足。这当然会导致电能质量差和电压凹陷。电能质量评估是电力公司和能源供应商识别和修复关键区域的重要手段。故障定位程序对配电网短期规划运行,减少停机时间,提高系统可靠性具有重要作用。通过网络建模和故障仿真,获得了电压暂降和电流信息。然后,利用测点电压暂降特征,利用k均值聚类方法对故障进行识别和分类。库邦变电站实际系统供电维修中故障定位估计的应用。
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引用次数: 1
Analysis of Internet of Things (IoT) Networks Using Extrinsic Information Transfer (EXIT) Chart 用外部信息传递(EXIT)图分析物联网(IoT)网络
Pub Date : 2018-08-01 DOI: 10.1109/ISITIA.2018.8710786
Fransisca Margaret Pasalbessy, K. Anwar
The Internet-of-Things (IoT) is estimated to be deployed to serve billions of devices constructing super-dense networks, of which the performances are depending on the multiuser detection (MUD) capabilities to support more devices. This paper analyzes the decoding behaviour of Narrowband IoT (NB-IoT) and Single Carrier IoT (SC-IoT) networks using extrinsic information transfer (EXIT) chart to observe their throughput performances in low and high volume traffics. NB-IoT uses slotted ALOHA as its multiple access technique that discards collided packets, while SC-IoT uses coded random access (CRA) scheme, where the collided packets are to be resolved using successive interference cancellation technique, which is equivalent to peeling decoding at packet level. We also analyze network performances in terms of packet-loss-rate (PLR) and throughput using a series of computer simulations. Our results confirmed that SC-IoT using CRA has better performance than NB-IoT in terms of PLR, throughput, and gap of EXIT chart indicating that SC-IoT based on CRA scheme is a promising scheme for future IoT to serve massive number of users or devices.
物联网(IoT)预计将为数十亿设备提供服务,构建超密集网络,其性能取决于多用户检测(MUD)能力,以支持更多设备。本文利用外部信息传输(EXIT)图分析了窄带物联网(NB-IoT)和单载波物联网(SC-IoT)网络的解码行为,观察了它们在低流量和高流量下的吞吐量性能。NB-IoT采用开缝ALOHA作为多址技术,丢弃碰撞报文;SC-IoT采用编码随机接入(CRA)方案,通过连续干扰消除技术解决碰撞报文,相当于在包级剥离解码。我们还使用一系列计算机模拟分析了网络在丢包率(PLR)和吞吐量方面的性能。我们的研究结果证实,使用CRA方案的SC-IoT在PLR、吞吐量和EXIT图的差距方面都优于NB-IoT,这表明基于CRA方案的SC-IoT是未来物联网服务于大量用户或设备的有前途的方案。
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引用次数: 4
Islanding Detection in Grid-Connected Distributed Photovoltaic Generation Using Artificial Neural Network 基于人工神经网络的并网分布式光伏发电孤岛检测
Pub Date : 2018-08-01 DOI: 10.1109/ISITIA.2018.8711344
Tirta Samuel Mehang, D. Riawan, Vita Lystianingrum B. Putri
Photovoltaic (PV) systems are nowadays one of the most wide-spread renewable energy systems in the network or grid with one purpose to improve the reliability of the grid. However, PV systems in the network also contribute a negative impact as well; when the main grid fails to supply the load and there is a part of the load energized by the PV systems while being isolated. This case is defined as islanding. If this condition cannot be detected, the load bus will experience voltage disturbance and power quality problem. This paper presents an islanding detection using Artificial Neural Network method (ANN). ANN learning data are generated from simulations under three main scenarios: power match, overvoltage, and undervoltage, with varying power factor (cos phi). Voltage signal at PCC node in load bus is classified to identify if system is in islanding condition or not. The simulation results shows that the built ANN is capable to detect both islanding and non-islanding mode.
光伏(PV)系统是目前在电网中应用最广泛的可再生能源系统之一,其目的之一是提高电网的可靠性。然而,电网中的光伏系统也会产生负面影响;当主电网无法提供负载,并且有一部分负载由光伏系统供电而被隔离时。这种情况被定义为孤岛。如果不能检测到这种情况,负载母线将出现电压扰动和电能质量问题。提出了一种基于人工神经网络的孤岛检测方法。人工神经网络学习数据是在三种主要场景下的模拟生成的:功率匹配,过压和欠压,具有不同的功率因数(cos phi)。对负载母线PCC节点电压信号进行分类,识别系统是否处于孤岛状态。仿真结果表明,所构建的人工神经网络能够检测出孤岛模式和非孤岛模式。
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引用次数: 3
Web-based Online Monitoring of Low Voltage Series Arcing with Line Impedance Analysis 基于网络的低压串联电弧在线监测与线阻抗分析
Pub Date : 2018-08-01 DOI: 10.1109/ISITIA.2018.8711302
D. A. Asfani, D. Fahmi, I. M. Yulistya Negara, Agung Brastama, F. Kurniawan, I. Ramadhan
In this paper, a web-based online monitoring system of low voltage series arcing was designed. Furthermore, the line impedance was anayzed. The method of arc detection was done by peak thresholding and peak counting of the current signal that were previously processed by a digital high pass filter in LabViewprogram. The algorithm in detection system was designed to recognize three common cases in a circuit, namely normal condition, load switching condition, and series arcing condition. The LabViewprogram was employed to communicate with a MySQL database that was located on a webhost server in internet network by sending the arcing detection log. The results showed that the proposed system could distinguish the arcing condition from the other cases and send this information to the web. In addition, the line impedance affected the sensitivity of arcing detection system since it attenuated the arcing signal.
本文设计了基于web的低压串联电弧在线监测系统。此外,对线路阻抗进行了分析。电弧检测的方法是在LabViewprogram中对经过数字高通滤波器处理的电流信号进行峰值阈值和峰值计数。检测系统中的算法主要用于识别电路中常见的三种情况,即正常状态、负载切换状态和串联电弧状态。LabViewprogram通过发送电弧检测日志与internet网络中位于webhost服务器上的MySQL数据库进行通信。结果表明,该系统能够有效地区分出不同的电弧工况,并将电弧工况信息发送到网络中。此外,线阻抗会使电弧信号衰减,从而影响电弧检测系统的灵敏度。
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引用次数: 0
Ultraviolet Rupiah Currency Image Recognition using Gabor Wavelet 基于Gabor小波的紫外印尼盾图像识别
Pub Date : 2018-08-01 DOI: 10.1109/ISITIA.2018.8711296
Anggarjuna Puncak Pujiputra, Hendra Kusuma, T. A. Sardjono
A good accuracy and certainty paper currency recognition has a great signification for banking system as well as for vending machines. In this paper we propose an ultraviolet (UV) Rupiah paper currency image recognition by implementing Gabor wavelet feature extraction. The UV image is used to distinguish between a genuine and a fake paper image currency, since under UV light a different visual in specific areas of the real banknote will glow and show hidden patterns. To have a high accuracy as well as efficiency, we use 3 scales and 8 orientations Gabor bank and subspace-LDA classifier in recognition process. The proposed Gabor method has advantages of easiness and high accuracy. The experimental results demonstrate that this method is quite reasonable in terms of preciseness, with 98.5% overall average recognition rate are obtained for the data of 160 UV Rupiah paper currency images.
良好的纸币识别准确性和确定性对银行系统以及自动售货机都具有重要意义。本文提出了一种基于Gabor小波特征提取的紫外印尼盾纸币图像识别方法。紫外线图像用于区分真钞和假钞,因为在紫外线照射下,真钞的特定区域会发光并显示隐藏的图案。为了提高识别的精度和效率,我们在识别过程中使用了3尺度8方向的Gabor库和子空间lda分类器。所提出的Gabor方法具有简便、精度高的优点。实验结果表明,该方法在精度上是相当合理的,对160张UV印尼盾纸币图像数据的总体平均识别率达到98.5%。
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引用次数: 6
Carotid Artery Plaque Image Recognition Using Gabor Wavelet and Principal Component Analysis 基于Gabor小波和主成分分析的颈动脉斑块图像识别
Pub Date : 2018-08-01 DOI: 10.1109/isitia.2018.8710967
M. Afandi, Hendra Kusuma, T. A. Sardjono
A pair of blood vessels inside of the human neck that serves to deliver blood to the brain is called carotid artery. Cholesterol in human body can form plaque, causes blockage to carotid artery that evoke atherosclerosis, stroke and heart disease which is a dangerous disease that can lead to death. If in certain long time it is not discovered, carotid artery will rupture. In clinical practice, the availability of ultrasound is wide also it is a low cost method to observe plaque in carotid artery. Unfortunately, ultrasound plaque images in carotid artery is diverse, noisy and not easy to be identified. It is also hard to develop computational techniques for recognizing plaque from ultrasound images. Therefore, it is a challenge to develop an optimal method that can be implemented in computer system to recognize plaque from ultrasound images. One method from many techniques available in pattern recognition is a feature extraction which can be obtained from various ways. In this work, A Gabor wavelet which is one of the powerful method in feature extraction is applied to recognize plaque characteristics. However a Gabor wavelet feature extraction will result a huge data, therefore to reduce the data dimension, the Principal Component Analysis (PCA) is applied to reduce such huge data. The result of this method for recognize plaque in carotid artery is satisfied with 100% recognition rate by using 8 orientations and 3 scales bank of Gabor with 100% eigenvectors configuration. In this research we used 24 carotid artery training images.
人类颈部内有一对血管,用来向大脑输送血液,它们被称为颈动脉。人体内的胆固醇会形成斑块,导致颈动脉堵塞,诱发动脉粥样硬化、中风和心脏病,是一种可致人死亡的危险疾病。如果在一定时间内不被发现,颈动脉就会破裂。在临床实践中,超声的可用性广泛,也是一种低成本的观察颈动脉斑块的方法。不幸的是,颈动脉超声斑块图像多样,噪声大,不易识别。开发从超声图像中识别斑块的计算技术也很困难。因此,开发一种可在计算机系统中实现的从超声图像中识别斑块的最佳方法是一项挑战。特征提取是模式识别中众多可用技术中的一种方法,它可以通过多种方式获得。本文将Gabor小波作为一种强大的特征提取方法应用于斑块特征识别。然而,Gabor小波特征提取会产生巨大的数据,因此为了降低数据维数,采用主成分分析(PCA)来降低数据维数。该方法对颈动脉斑块进行识别,采用8个方向和3个尺度的Gabor库,具有100%的特征向量配置,识别率达到100%。在本研究中,我们使用了24张颈动脉训练图像。
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引用次数: 2
Inclined Image Recognition for Aerial Mapping by Unmanned Aerial Vehicles 基于无人机的航空测绘倾斜图像识别
Pub Date : 2018-08-01 DOI: 10.1109/ISITIA.2018.8710975
M. Attamimi, R. Mardiyanto, A. N. Irfansyah
In general, aerial mapping is an image registration problem, i.e., the problem of transforming different sets of images into one coordinate system. Aerial mapping is one of the important capability of an unmanned aerial vehicle (UAV). Here, the images processed by the registration system is strongly influenced by the quality of the image captured by the UAV. To select the image that will be processed efficiently is not easy considering the ground truth in the mapping process is not given before the UAV flies and captures the image. On the other hand, generally, UAV will fly and take the image in sequence regardless of the quality. These will result in several issues, such as: 1) the quality of mapping results becomes bad, and 2) the computational cost of registration process becomes high. To tackle such issues, therefore, we need a recognition system that is able to recognize images that should be excluded from the registration process. In this paper, we define such image as an “inclined image,” i.e., images captured by UAV not perpendicular with the ground. Although we can calculate the inclination angle using a gyroscope attached to the UAV, our interest here is to recognize the images without the use of such sensor like human do. To realize that, we utilize a deep learning method to build an inclined image recognition system. We tested our proposed system with images captured by UAV. The results showed that the proposed system yielded accuracy rate of 86.4%.
一般来说,航空测绘是一个图像配准问题,即将不同的图像集转换成一个坐标系的问题。航空测图是无人机的重要能力之一。在这里,配准系统处理的图像受到无人机捕获图像质量的强烈影响。考虑到在无人机飞行和捕获图像之前,映射过程中的地面真实度是不确定的,因此选择需要有效处理的图像并不容易。另一方面,一般情况下,不管质量如何,无人机都会按顺序飞行和拍摄图像。这将导致以下几个问题:1)制图结果质量变差;2)配准过程的计算成本变高。因此,为了解决这些问题,我们需要一个识别系统,能够识别应该排除在配准过程中的图像。在本文中,我们将这种图像定义为“倾斜图像”,即无人机捕获的不垂直于地面的图像。虽然我们可以使用附着在无人机上的陀螺仪来计算倾角,但我们在这里的兴趣是在没有像人类那样使用这种传感器的情况下识别图像。为了实现这一点,我们利用深度学习方法来构建一个倾斜图像识别系统。我们用无人机捕获的图像对我们的系统进行了测试。结果表明,该系统的准确率为86.4%。
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引用次数: 2
Mango Leaf Classification with Boundary Moments of Centroid Contour Distances as Shape Features 以质心轮廓距离边界矩为形状特征的芒果叶片分类
Pub Date : 2018-08-01 DOI: 10.1109/ISITIA.2018.8711115
Eko Prasetyo, R. Adityo, N. Suciati, C. Fatichah
The previous research in mango leaf classification which used 270 features consisted of 256 texture features, 2 color features, and 2 shape features, could not achieve high classification performance. In this study, we conduct improvement by combining the previous features with the Boundary Moments of Centroid Contour Distance (CCD) and classify the combination features using Support Vector Machine with Linear and RBF kernels. The experiment results show that the combination features achieve higher classification performance compared to the previous features.
以往的芒果叶分类研究使用了270个特征,包括256个纹理特征、2个颜色特征和2个形状特征,无法达到较高的分类性能。在本研究中,我们将之前的特征与质心轮廓距离(CCD)的边界矩相结合进行改进,并使用线性核和RBF核的支持向量机对组合特征进行分类。实验结果表明,与之前的特征相比,组合特征取得了更高的分类性能。
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引用次数: 3
Heart Rhythm Classification from Electrocardiogram Signals Using Hybrid PSO-Neural Network Method and Neural ICA 基于pso -神经网络和神经ICA的心电图信号心律分类
Pub Date : 2018-08-01 DOI: 10.1109/ISITIA.2018.8710837
Miftah Rahmalia Arivati, A. Nasution
Studies on the classification of heart rhythms from Electrocardiogram (ECG) signal interpretation have been widely reported. Several techniques for recognizing the abnormalities on left bundle branch (LBBB), right bundle branch (RBBB) and premature ventricular contraction (PVC) using the Taguchi optimization method and the Naïve Bayes classification method have been reported. Unfortunately results from the Naïve Bayes classification method are not as good as those using method such as SVM classification method. In the paper we propose a Hybrid PSO-Neural Network (NN) as a classification method and a Neural Independent Component Analysis (Neural-ICA) as a filter method. Neural ICA aims to separate the original signal and the noise signal on the ECG signal record. In this research the ICA method implements the Neural algorithm for the process of updating the weights after filter process. The Hybrid PSO-Neural Network is a Neural Network method that optimized by PSO to optimize the classification result. Hybrid PSO-NN method can improve the classification accuracy up to 2%, i.e. 99% accuracy, in comparison to NN method 98% accuracy and SVM method 96% accuracy, respectively.
从心电图信号的解释中对心律进行分类的研究已被广泛报道。本文报道了几种利用田口优化方法和Naïve贝叶斯分类方法识别左束支(LBBB)、右束支(RBBB)和室性早搏(PVC)异常的方法。遗憾的是,Naïve贝叶斯分类方法的结果不如使用SVM分类方法的结果好。本文提出了一种混合粒子群-神经网络(NN)作为分类方法和一种神经独立分量分析(Neural- ica)作为过滤方法。神经ICA的目的是分离心电信号记录中的原始信号和噪声信号。在本研究中,ICA方法在滤波后的权重更新过程中实现了神经网络算法。混合粒子群算法是一种利用粒子群算法对分类结果进行优化的神经网络方法。混合PSO-NN方法的分类准确率可提高2%,即99%的准确率,而NN方法的准确率为98%,SVM方法的准确率为96%。
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引用次数: 0
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2018 International Seminar on Intelligent Technology and Its Applications (ISITIA)
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