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2014 6th International Conference on Information Technology and Electrical Engineering (ICITEE)最新文献

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Real time key element extraction for design of in flight meal services based on passenger's personality traits 基于旅客个性特征的飞机餐服务设计关键要素实时提取
Taufik Djatna, H. H. Hidayat
In flight meal services is one of the most important points to judge an airline as favorite to the passengers. It is crucial to include personal trait in designing these services. Thus, this work concentrated on formulating model of in-flight meal services. First, by using Key Element Extraction (KEE), we identify passenger's personality traits in real time from social media. And then we design model formulation of in-flight meal services, by using Quantification Theory Type 1 (QTT1). The identification of passenger's personality traits in computational experiment are based on particular type such as neophobia, variety seeking selective, and variety seeking. Variants formulation for each personality traits were designed for different categories such as menu variant, originality, appearance, suitability, cordiality, punctually and responsibility. To enabling implementation of this model, it is required to attach it to the current booking and database costumer system that running online.
在飞行中,餐饮服务是判断航空公司是否受乘客喜爱的最重要的指标之一。在设计这些服务时,包含个人特征是至关重要的。因此,本工作的重点是制定飞机餐服务模型。首先,利用关键要素提取(KEE)技术,从社交媒体中实时识别乘客的个性特征。然后,利用量化理论类型1 (QTT1)设计了飞机餐服务的模型制定。计算实验中乘客人格特征的识别是基于特定类型的,如新恐惧症、多样性寻求选择性和多样性寻求。每种人格特征的变体公式分别针对菜单变体、原创性、外观、适宜性、亲切性、准时性和责任感等不同类别进行设计。为了实现此模型,需要将其附加到当前在线运行的预订和数据库客户系统。
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引用次数: 2
Partial discharge analysis using PCA and ANN for the estimation of size and position of metallic particle adhering to spacer in Gas-Insulated System 用主成分分析和神经网络分析气体绝缘系统中金属颗粒附着在隔离片上的大小和位置
F. N. Budiman, Y. Khan
The presence of metallic particles can adversely affect the reliability of Gas-Insulated Substation (GIS) by initiating partial discharges (PDs). Therefore, the investigation of PD characteristics and particle size and position on the spacer surface are the significant steps toward the reliability improvement of the GIS equipments. This paper presents the use of Back-Propagation Artificial Neural Network (BP-ANN) technique supplemented with Principal Component Analysis (PCA) as the PD pattern recognition tools for the estimation of the particle size (length) and position on the spacer surface in a simulated GIS. PD features acquisition was performed by collecting their fingerprints from the measurements carried out using IEC 60270 method. The role of PCA is to reduce the dimension of the collected PD fingerprint data. The obtained results show that PCA can significantly improve the BP-ANN performance in terms of execution time. Without PCA, 88% and 92% accuracies can be achieved when BP-ANN was implemented with 1 and 2 hidden layers, respectively. With the integration of PCA, execution times were greatly reduced while retaining fairly high accuracy, i.e. 88% and 88%. Thus the proposed method is a contribution in development of the tool for improving the reliability of GIS.
金属颗粒的存在会引发局部放电,从而对气体绝缘变电站(GIS)的可靠性产生不利影响。因此,研究局部放电特性和间隔表面的颗粒大小和位置是提高GIS设备可靠性的重要步骤。本文介绍了利用反向传播人工神经网络(BP-ANN)技术和主成分分析(PCA)作为PD模式识别工具,在模拟GIS中估计间隔表面上的颗粒大小(长度)和位置。PD特征采集是通过使用IEC 60270方法从测量中收集指纹来完成的。PCA的作用是对采集到的PD指纹数据进行降维。结果表明,PCA在执行时间上显著提高了BP-ANN的性能。在不使用PCA的情况下,BP-ANN分别使用1层和2层隐藏层时,准确率分别达到88%和92%。通过与PCA的集成,大大减少了执行时间,同时保持了较高的准确率,分别为88%和88%。因此,所提出的方法为开发提高GIS可靠性的工具做出了贡献。
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引用次数: 1
Investigation and modeling of transient voltage stability problems in wind farms with DFIG and crowbar system 采用DFIG和撬棍系统的风电场暂态电压稳定问题的研究与建模
K. Malekian, U. Schmidt, A. Shirvani, W. Schufft
The behavior of wind farms with doubly fed induction generators (DFIGs) in fault ride through (FRT) conditions is investigated in the first part of this article. The requirements mandated by grid-codes to contribute to the voltage stability are introduced. Afterwards, the problems associated with applying the crowbar system in FRT conditions are discussed. In the next part, modeling of this problem in huge wind farms is presented. For this purpose, an equivalent model for a group of DFIGs is developed. The proposed equivalent model is based on the concurrency of the active-crowbar spans of the individual DFIGs. The comparison between simulation results with the detailed model proves the validity of the proposed equivalent model.
本文第一部分研究了双馈感应发电机(DFIGs)风电场在故障穿越(FRT)条件下的行为。介绍了电网规范对电压稳定性的要求。然后,讨论了在FRT条件下应用撬棍系统的有关问题。在接下来的部分中,我们将在大型风电场中对这一问题进行建模。为此,建立了一组DFIGs的等效模型。所提出的等效模型是基于各个dfig的活动撬棍跨度的并发性。仿真结果与详细模型的对比验证了所提等效模型的有效性。
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引用次数: 1
The dynamic performance of grid-connected fixed-speed Wind Turbine Generator 并网定速风力发电机组动态性能研究
H. Ali
The penetration of Wind Turbine Generator (WTG) into the power system has been increasing. As a result, the dynamic characteristic of WTG should be carefully studied to see its effect to the power system. This paper presents the dynamic study of fixed-speed WTG connected to the grid. The one-mass and two-mass shaft model are incorporated into the study to see their effect on the system dynamic. The observations are carried out during the dynamic of wind speed and fault condition. Matlab/Simulink is used to simulate the system. The result shows that two-mass shaft model is able to predict the behavior more accurate that that of in one-mass shaft model.
风力发电机组在电力系统中的应用越来越广泛。因此,应仔细研究WTG的动态特性,以了解其对电力系统的影响。本文对定速WTG并网的动态特性进行了研究。研究了单质量和双质量轴模型对系统动力学的影响。观测是在风速和故障状态的动态过程中进行的。利用Matlab/Simulink对系统进行仿真。结果表明,双质量轴模型比单质量轴模型能更准确地预测轴的运动特性。
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引用次数: 4
Quantum neural network for State of Charge estimation 电荷状态估计的量子神经网络
Kevin Gausultan Hadith Mangunkusumo, K. Lian, F. D. Wijaya, Y.-R Chang, Y. D. Lee, Y. Ho
State of Charge (SoC) estimation is one of the most important parts of Battery Management System (BMS). Inaccurate estimation of SoC may cause overcharge or overdischarge which could lead permanent damage to battery cells. Neural Network (NN) models can yield quite accurate SoC estimation. However, the computation effort is also quite huge and it takes long time training. To improve the performance of NN, a new battery SoC estimation method based on Quantum Neural Network (QNN) is proposed. Results show that QNN is more computation efficient and yields more accurate results, when compared to the conventional NN and other methods such as Coulometric Counting (CC) and Open Circuit Voltage (OCV) prediction methods.
电池荷电状态(SoC)估计是电池管理系统(BMS)的重要组成部分之一。不准确的SoC估计可能会导致过充电或过放电,从而导致电池的永久性损坏。神经网络(NN)模型可以产生相当精确的SoC估计。然而,计算量也非常大,并且需要很长时间的训练。为了提高神经网络的性能,提出了一种基于量子神经网络(QNN)的电池SoC估计方法。结果表明,与传统神经网络和其他方法(如库仑计数(CC)和开路电压(OCV)预测方法)相比,QNN具有更高的计算效率和更准确的结果。
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引用次数: 2
FDTD method for scattering parameters extraction of rectangular waveguide loaded with anisotropic dielectric material 加载各向异性介质的矩形波导散射参数提取的FDTD方法
A. Munir, M. Randa, M. R. Effendi
In this paper, three-dimension (3D) finite-difference time-domain (FDTD) method is proposed to extract the scattering parameters of anisotropic dielectric material loaded on a rectangular waveguide. Here, the scattering parameters, i.e. reflection coefficient (S11) and transmission coefficient (S21), are extracted from the electric fields obtained on different observation planes closed to the material. The principal used to analyze electromagnetics (EM) wave scattering based on FDTD method is a wave orthogonality and discontinuity which occurs inside the rectangular waveguide. To validate the result of FDTD method, another analysis is carried out by using a commercial software, namely HFSS®. From the result, it shows that the FDTD method has a good agreement qualitatively compared to the commercial software with some discrepancy on the S-parameter curve. The disparity of results occurs as the numerator of equation to calculate incident and reflection waves tends to be very small with the increase of frequencies which are being calculated. Moreover, the discrepancy is also evoked by the appearance of higher order modes and the irregularity of EM field inside the rectangular waveguide particularly when it is loaded with anisotropic dielectric material.
本文提出了一种三维时域有限差分(FDTD)方法来提取加载在矩形波导上的各向异性介质材料的散射参数。在这里,从靠近材料的不同观测面上获得的电场中提取散射参数,即反射系数(S11)和透射系数(S21)。基于时域有限差分法分析电磁波散射的原理是电磁波在矩形波导内的正交性和不连续性。为了验证FDTD方法的结果,使用商用软件HFSS®进行了另一次分析。结果表明,时域有限差分法与商业软件在定性上有较好的一致性,但在s参数曲线上存在一定的差异。随着计算频率的增加,入射波和反射波计算方程的分子趋于很小,从而导致计算结果的不一致。此外,高阶模的出现和矩形波导内部电磁场的不规则性也引起了这种差异,特别是当加载各向异性介质材料时。
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引用次数: 6
Experimental study on improved parametric stereo for bit rate scalable audio coding 用于码率可扩展音频编码的改进参数立体声实验研究
I. Elfitri, R. Kurnia, Defry Harneldi
This paper presents an experimental study on generalizing Parametric Stereo (PS) technique in an attempt to make it scalable for low and high bit rate implementations which are very useful for various internet services. As specified in the MPEG standard, PS is only intended for applications at a stereo bit rate of 24 kb/s. If operated at higher bit rates, PS would have much worse performance than other audio codecs such as MPEG-1/2 Layer 3 (MP3) and MPEG Advanced Audio Coding (AAC). To improve performance at higher bit rates, the proposed Improved PS transmits residual signal. However, the bit rates of the down-mix and residual signals have to be selected properly to achieve optimal performance. The results of the experiments show that performance of the Improved PS, in terms of objective difference grade (ODG), significantly improves as the bit rate increases. Testing objectively using 5 different critical audio materials, Improved PS consistently outperforms AAC Stereo at a bit rate of 128 kb/s.
本文提出了一项推广参数立体(PS)技术的实验研究,试图使其可扩展到低比特率和高比特率的实现,这对各种互联网服务非常有用。根据MPEG标准的规定,PS仅适用于24 kb/s的立体声比特率的应用程序。如果以更高的比特率运行,PS的性能将比MPEG-1/2 Layer 3 (MP3)和MPEG Advanced audio Coding (AAC)等其他音频编解码器差得多。为了提高在更高比特率下的性能,改进的PS传输剩余信号。然而,为了获得最佳性能,必须适当选择下混和剩余信号的比特率。实验结果表明,改进后的PS在客观差分等级(ODG)方面的性能随着比特率的提高而显著提高。客观地使用5种不同的关键音频材料进行测试,改进的PS在128 kb/s的比特率下始终优于AAC立体声。
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引用次数: 7
Digital image hashing using local histogram of Oriented Gradients 利用有向梯度局部直方图的数字图像哈希
Iwan Setyawan, Ivanna K. Timotius
The ease with which digital images can be manipulated without severe degradation of quality makes it necessary to be able to verify the authenticity of digital images. One way to establish the image authenticity is by computing a hash sequence from an image. This hash sequence must be robust against non content-altering manipulations, but must be able to show if the content of the image has been tampered with. Furthermore, the hash has to have enough differentiating power such that the hash sequences from two different images are not similar. This paper presents an image hashing system based on local Histogram of Oriented Gradients. The system is shown to have good differentiating power, robust against non content-altering manipulations such as filtering and JPEG compression and is sensitive to content-altering attacks.
数字图像可以轻松地操纵而不会严重降低质量,因此有必要能够验证数字图像的真实性。建立图像真实性的一种方法是从图像中计算哈希序列。该散列序列必须对非内容更改操作具有鲁棒性,但必须能够显示图像的内容是否已被篡改。此外,哈希必须有足够的微分能力,使得来自两个不同图像的哈希序列不相似。提出了一种基于局部定向梯度直方图的图像哈希算法。该系统具有良好的差分能力,对过滤和JPEG压缩等非内容更改操作具有鲁棒性,并且对内容更改攻击敏感。
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引用次数: 8
Performance of anti-jamming techniques with bit interleaving in OFDM-based tactical communications 基于ofdm的战术通信中位交错抗干扰技术的性能
P. Puspitaningayu, G. Hendrantoro
Tactical communications is a communication system which is applied to a military operation with some strict requirements compared to a commercial communication system. One of the important requirement is its security. This communication has a high risk to be attacked by jamming which generated by the adversary. The other important requirement is network flexibility to handle its high mobility and information exchange in a big order. To fulfil those special requirement of tactical communication, OFDM system is equipped with channel coding and interleaving to handle information damage caused by jamming. The jamming strategy used in this research is single-tone and multitone jamming which strike while information signal pass the AWGN channel. In this research. evaluate the performance of OFDM system which is equipped with Convolutional Encoder and Interleaver with various schemes. By using a half-rate convolutional encoder, for both parameters BER and interleaving gain, helical-scan interleaver scheme shows the best performance among block and random interleaver. However due to its complexity in applying this scheme, block interleaver which is the second best is preferred.
战术通信是一种适用于军事行动的通信系统,与商业通信系统相比,战术通信系统有更严格的要求。其中一个重要的要求是它的安全性。这种通信具有被敌方产生的干扰攻击的高风险。另一个重要的要求是网络的灵活性,以处理其高移动性和大订单的信息交换。为了满足战术通信的这些特殊要求,OFDM系统采用了信道编码和交织技术来处理干扰造成的信息破坏。本研究采用单音和多音干扰策略,在信息信号通过AWGN信道时进行干扰。在这项研究中。对采用卷积编码器和交织器的OFDM系统的性能进行了评价。利用半速率卷积编码器,螺旋扫描交织器在误码率和交织增益方面都表现出块交织器和随机交织器中最好的性能。然而,由于该方案的应用复杂性,第二好的块交织器是首选的。
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引用次数: 3
Design of decoupled repetitive control for MIMO systems MIMO系统的解耦重复控制设计
E. Kurniawan, R. Wardoyo, Oka Mahendra
This paper introduces the design of decoupled repetitive control (RC) for multi-inputs multi-outputs (MIMO) system. The design is started by decoupling the MIMO system into separate single-input single-output (SISO) models. Then, a set of low order and causal RC compensator is designed for each single-input single-output (SISO) model obtained from decou-pling. The compensators that ensure the RC stability condition, are obtained by solving optimization problems. Simulation results are given to demonstrate the effectiveness of the proposed design.
介绍了多输入多输出(MIMO)系统的解耦重复控制设计。设计首先将MIMO系统解耦为单独的单输入单输出(SISO)模型。然后,对解耦得到的每个单输入单输出(SISO)模型设计一组低阶因果RC补偿器。通过求解优化问题,得到保证RC稳定条件的补偿器。仿真结果验证了该设计的有效性。
{"title":"Design of decoupled repetitive control for MIMO systems","authors":"E. Kurniawan, R. Wardoyo, Oka Mahendra","doi":"10.1109/ICITEED.2014.7007962","DOIUrl":"https://doi.org/10.1109/ICITEED.2014.7007962","url":null,"abstract":"This paper introduces the design of decoupled repetitive control (RC) for multi-inputs multi-outputs (MIMO) system. The design is started by decoupling the MIMO system into separate single-input single-output (SISO) models. Then, a set of low order and causal RC compensator is designed for each single-input single-output (SISO) model obtained from decou-pling. The compensators that ensure the RC stability condition, are obtained by solving optimization problems. Simulation results are given to demonstrate the effectiveness of the proposed design.","PeriodicalId":148115,"journal":{"name":"2014 6th International Conference on Information Technology and Electrical Engineering (ICITEE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121407007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
期刊
2014 6th International Conference on Information Technology and Electrical Engineering (ICITEE)
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