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2020 17th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)最新文献

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Floating Impedance Simulator Realization 浮动阻抗模拟器的实现
Nutcha Likhitkitwoerakul, Natchanai Roongmuanpha, W. Tangsrirat
This paper presents the floating impedance function simulator using flipped voltage follower-based differential voltage to current converter (DVTC) along with three passive elements. With the proper selection of the three passive components, the floating inductor, capacitor and frequency- dependent negative resistor (FDNR) can be realized. The realized equivalent impedance value of the proposed simulator can be controlled conveniently by changing the passive element values. A second-order bandstop filter and third-order lowpass filter are designed using the proposed simulators as application examples. To verify the workability of the proposed circuit, simulation results are confirmed through PSPICE program using 0.25-μm CMOS process parameters from TSMC (Taiwan Semiconductor Manufacturing Company).
本文提出了一种基于翻转电压跟随器的差分电压电流变换器(DVTC)和三个无源元件的浮动阻抗函数模拟器。通过对三种无源器件的合理选择,可以实现浮动电感、电容和频率相关负电阻(FDNR)。通过改变无源元件的值,可以方便地控制模拟器实现的等效阻抗值。以该仿真器为应用实例,设计了二阶带阻滤波器和三阶低通滤波器。为了验证所提出电路的可操作性,采用TSMC(台湾半导体制造公司)0.25-μm CMOS工艺参数,通过PSPICE程序验证了仿真结果。
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引用次数: 1
Improvement of Motor Imagery BCI using Silent Speech 无声言语对运动意象脑机接口的改善
Sansit Ngamrassameewong, Vichaya Manatchinapisit, Y. Wongsawat
Human expression are exhibited throughout by language, which is generally used for communications. Making use of this fact, combining the language expression silently with the imagination of movement may lead to the improvement on developing the brain-computer interface (BCI) system. This paper focuses on the silent speech related to upper limbs movement. In the experiment, five subjects performed silent speech, i.e. at the same time, imagined upper limbs movement follow by two words, which are "RIGHT" or "LEFT". Furthermore, each of the participants performed another experiment doing only motor imagery (MI). In both experiments, there are five trials for each movement side. 19-channel EEG was recorded. The EEG signals were simply analyzed by using the absolute power. The result shows the clearer activation of event-related desynchronization (ERD) of the alpha band (8-12 Hz) on the motor area (C3, C4) during the combination of silent speech and MI.
人类的表达是通过语言表现出来的,语言通常用于交流。利用这一事实,将无声的语言表达与动作的想象相结合,可以提高脑机接口(BCI)系统的开发水平。本文主要研究与上肢运动相关的无声言语。在实验中,五名被试进行无声说话,即同时想象上肢的运动,然后想象两个单词,分别是“右”或“左”。此外,每个参与者都做了另一个只做运动想象(MI)的实验。在这两个实验中,每个运动侧都有5次试验。记录19路脑电图。采用绝对功率法对脑电信号进行简单分析。结果表明,沉默言语与MI组合时,运动区(C3、C4) α带(8 ~ 12 Hz)的事件相关去同步(ERD)激活更为明显。
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引用次数: 0
A Study of Gain Improvement of a Slot Antenna Using Curved Metallic Holes Structure 利用弯曲金属孔结构提高缝隙天线增益的研究
Aitthiphak Boonyakiat, P. Kamphikul, S. Kampeephat
Nowadays, a microstrip slot antenna is widely used in the modern wireless communication systems because it has more advantages such as compact, easy fabrication, low cost, and wide bandwidth. However, it also has the drawback such low gain, because of its resonant nature of microstrip. Therefore, this paper presents a method to increase and improve the gain of slot antenna, a bandwidth of 1,800 MHz to 6,000 MHz, to apply for a modern wireless communication system. The new technique of metamaterial utilized for improving the gain of slot antenna is presented. From this study, the proper metamaterial, the curved metallic holes structure, is competent to improve the performance of slot antenna by increasing it directivity, gain, and radiation efficiency. Moreover, a behavior of gain characteristic, reflection coefficient (S11), and radiation pattern of slot antenna with and without a metallic holes structure are examined in this paper. From simulated results by simulation software, it noted that the gains of all the operating frequencies of a slot antenna with a metallic holes structure have been increased around 1.7 dB of all operating frequencies when compared to a slot antenna without a metallic holes structure.
微带缝隙天线具有结构紧凑、制作简单、成本低、带宽宽等优点,在现代无线通信系统中得到了广泛的应用。然而,由于微带的谐振特性,它也有增益低的缺点。因此,本文提出了一种增加和提高带宽为1800 ~ 6000 MHz的缝隙天线增益的方法,以适用于现代无线通信系统。提出了利用超材料提高缝隙天线增益的新技术。研究结果表明,适当的超材料,即弯曲的金属孔结构,可以通过提高槽天线的指向性、增益和辐射效率来改善槽天线的性能。此外,本文还研究了有无金属孔结构的缝隙天线的增益特性、反射系数(S11)和辐射方向图的变化规律。从仿真软件的仿真结果来看,金属孔结构的缝隙天线的所有工作频率的增益比没有金属孔结构的缝隙天线的所有工作频率的增益提高了约1.7 dB。
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引用次数: 1
Portfolio Management in Different Market Trends for Thai Mutual Funds 泰国共同基金在不同市场趋势下的投资组合管理
Siriphen Pungetmongkol, E. Nantajeewarawat, Pattravadee Ploykitikoon, Paramet Tanwanont
The paper aims to investigate portfolio performance of a rebalanced portfolio and a buy-and-hold portfolio for five different market trends, i.e., up, down, sideway up, sideway down, and sideway market trends. Three asset classes, i.e., equity, bond, and gold, are considered. The portfolio initial weights for assets are determined by using the Markowitz method. Geometric Brownian motion is used for simulating future prices of each asset. Linear regression is performed to classify the simulated prices into different market trends. The rebalancing technique is applied to each trend. The risk and return performance of a rebalanced portfolio and those of a buy-and-hold portfolio are compared for each market trend.
本文旨在研究再平衡投资组合和买入持有投资组合在五种不同市场趋势下的投资组合表现,即上涨、下跌、横盘上涨、横盘下跌和横盘市场趋势。考虑了三种资产类别,即股票、债券和黄金。利用马科维茨方法确定资产组合的初始权重。几何布朗运动用于模拟每种资产的未来价格。通过线性回归将模拟价格划分为不同的市场趋势。再平衡技术应用于每个趋势。在每个市场趋势下,对再平衡投资组合和买入并持有投资组合的风险和回报表现进行比较。
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引用次数: 2
EIT-Like Effect in Metamaterials based on Two-Layer Arrays for High-Gain Antennas 基于双层阵列的高增益天线超材料中的类eit效应
K. Kanjanasit, Sutasinee Sanesaowarod, N. Homsup
In this paper we present the comparative study of an electromagnetically induced transparent (EIT) effect in a two-layer metamaterial (MM) for a high-gain planar antenna application. The proposed mechanism of a low-profile EIT-like MM is based on an identical resonant square ring arrays in a sandwich structure with a small dielectric thickness. The EIT-like effect was observed connected with a resonance condition in a narrow transmission window due to the near-field coupling of the identical ring resonators behaved as a unit-cell element in periodic arrangement. The simulation study shows that the property of electric conductivity in a perfect electric conductor (PEC) and copper influences on a resonant transmission peak. The EIT-like MM was utilized for a high-gain directive planar antenna design by applying a blank conductor surface at a planar line symmetry acting as an electromagnetic mirror. The narrow aperture fed by short-end coplanar waveguide (CPW) feed-line was incorporated into a conductor surface as a driven radiator. The EIT-like MM antenna can be operated close to the targeted resonant frequency of the EIT-like MM (~10 GHz). The proposed planar antenna provides a thickness of λ/60 (0.5 mm). The simulation of the proposed planar antenna design was performed and it reports the antenna gain of 14.45 dBi and 13.32 dBi in cases of using the PEC- and copper-based square ring resonator array respectively. The antenna-gain difference is due to the ohmic-loss absorption regarding to electric conductivity.
本文对用于高增益平面天线的两层超材料(MM)的电磁感应透明(EIT)效应进行比较研究。所提出的低轮廓eit型MM的机制是基于具有小介电厚度的夹层结构中的相同共振方环阵列。由于相同环形谐振器的近场耦合,在窄透射窗口内的共振条件下观察到类似eit的效应,其表现为周期性排列的单元格元件。仿真研究表明,理想电导体(PEC)的电导率特性和铜对谐振传输峰的影响。通过在平面线对称处施加空白导体表面作为电磁反射镜,将类似eit的MM用于高增益的定向平面天线设计。将短端共面波导馈线馈送的窄孔径作为驱动辐射体集成到导体表面。类eit MM天线可以工作在接近类eit MM的目标谐振频率(~10 GHz)。所提出的平面天线的厚度为λ/60 (0.5 mm)。对所提出的平面天线设计进行了仿真,结果表明,采用PEC和铜基方环谐振器阵列时,天线增益分别为14.45 dBi和13.32 dBi。天线增益的差异是由于与电导率有关的欧姆损耗吸收。
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引用次数: 1
ECTI-CON 2020 Messages ECTI-CON 2020信息
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引用次数: 0
Machine-Learning Based DDOS Attack Classifier in Software Defined Network 基于机器学习的软件定义网络DDOS攻击分类器
A. Kyaw, May Zin Oo, C. Khin
Due to centralized control and programmable capability of the SDN architecture, network administrators can easily manage and control the whole network through the centralized controller. According to the SDN architecture, the SDN controller is vulnerable to distributed denial of service (DDOS) attacks. Thus, a failure of SDN controller is a major leak for security concern. The objectives of paper is therefore to detect the DDOS attacks and classify the normal or attack traffic in SDN network using machine learning algorithms. In this proposed system, polynomial SVM is applied to compare to existing linear SVM by using scapy, which is packet generation tool and RYU SDN controller. According to the experimental result, polynomial SVM achieves 3% better accuracy and 34% lower false alarm rate compared to Linear SVM.
由于SDN架构的集中控制和可编程能力,网络管理员可以通过集中控制器方便地管理和控制整个网络。在SDN架构下,SDN控制器容易受到DDOS (distributed denial of service)攻击。因此,SDN控制器的故障是安全问题的主要泄漏。因此,本文的目标是使用机器学习算法检测DDOS攻击并对SDN网络中的正常或攻击流量进行分类。在该系统中,利用数据包生成工具scapy和RYU SDN控制器,将多项式支持向量机与现有的线性支持向量机进行比较。实验结果表明,与线性支持向量机相比,多项式支持向量机的准确率提高3%,虚警率降低34%。
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引用次数: 8
Occupancy Forecasting using LSTM Neural Network and Transfer Learning 基于LSTM神经网络和迁移学习的入住率预测
Piyapat Leeraksakiat, W. Pora
Neural networks can be used as a forecasting tool in several fields such as medicine, agriculture, and entertainment. Accurate forecasting of human habit such as the entry/exit behavior of a person may be exploited to control electrical appliances in order to reduce energy consumption while maintaining comfort. However, the neural network has a problem that is it can be trained to forecast behavior of only one person. If the neural network is used to predict another person, It will decrease accuracy. Although new data will be collected to re-train the neural network, data collection might take long time. This paper proposes to use transfer learning on a Long Short-Term Memory (LSTM) network in order to improve the performance of the network after a specific person uses the room, the person changes his/her behavior, or a new person occupies the room. After a network is trained by a norm dataset, then new batches of sampling data can be applied to update the network, in other words, to transfer the new knowledge on top of the existing one. The results show that transfer learning helps the LSTM network to be able to track the behavior change continually. Its forecast becomes more and more accurate, when compared to that of the norm one.
神经网络可以作为一种预测工具,用于医学、农业和娱乐等多个领域。可以利用对人类习惯(例如人的进出行为)的准确预测来控制电器,以便在保持舒适的同时减少能源消耗。然而,神经网络有一个问题,那就是它只能被训练来预测一个人的行为。如果神经网络被用来预测另一个人,它会降低准确性。虽然将收集新的数据来重新训练神经网络,但数据收集可能需要很长时间。本文提出在长短期记忆(LSTM)网络上使用迁移学习,以提高特定人员使用房间、该人员改变其行为或新人员占用房间后网络的性能。在一个网络被范数数据集训练后,新的一批采样数据可以用来更新网络,换句话说,在现有的知识上转移新的知识。结果表明,迁移学习有助于LSTM网络持续跟踪行为变化。与常规预测相比,它的预测越来越准确。
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引用次数: 8
Investigation of Comparator Circuit Base-on Voltage Reference on Visible Light Communication System 可见光通信系统中基于基准电压的比较电路研究
T. Sopon, W. Wongtrairat, Maitree Thamma, W. Wiboonjaroen, S. Kampeephat, Thanat Sooknuan
In this work, we investigate the voltage reference of comparator circuit for the receiver circuit on visible light communication (VLC) system. The method is the voltage reference comparator of the VLC receiver circuit in the data pulse signal compensation which is the data pulse signal detection circuit. In the experiment, we consider the signal with Manchester modulation on the FPGA board of the data signal via channel with the range of light intensity between 300 to 1,300 lux. The result of experiment sent the data inputs via the white LED at a distance of 70 - 90 centimeters which measured the signal outputs with the average percentage of bit error 0.145.
本文研究了可见光通信(VLC)系统中接收电路比较器电路的基准电压。该方法是VLC接收电路中数据脉冲信号补偿的电压基准比较器,即数据脉冲信号检测电路。在实验中,我们考虑在FPGA板上采用曼彻斯特调制的信号,该信号的光强范围在300到1,300 lux之间。实验结果通过白光LED在70 ~ 90厘米的距离上发送数据输入,测量出平均误码率为0.145的信号输出。
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引用次数: 0
A Meminductor Emulator Based on Flux-controlled Model Using Field Programmable Analog Array 基于现场可编程模拟阵列磁链控制模型的mem感应器仿真器
P. Thongdit, Surachai Chunchay, K. Angkeaw
This paper presents a scheme of pinched hysteresis loop behavior of a proposed meminductor emulator circuit at frequency of 5 kHz, 10 kHz, and 20 kHz. The mathematical model with flux-controlled concept was chosen to apply for meminductor equation and used for creating a proposed emulator. The proposed meminductor emulator was created based on the device called Field Programmable Analog Arrays (FPAAs). The AnadigmDesigner2 software was used to simulate in order to verify the performance of proposed meminductor emulator. Moreover, the variation of phase diagram of time integral of the flux and charge were computed to determine the meminductance.
本文提出了一种在5 kHz、10 kHz和20 kHz频率下的记忆电感仿真电路的缩相迟滞回线行为方案。选择具有磁链控制概念的数学模型应用于记忆电感器方程,并用于建立仿真器。所提出的记忆电感仿真器是基于现场可编程模拟阵列(FPAAs)器件创建的。利用AnadigmDesigner2软件进行仿真,验证所提出的mem感应器仿真器的性能。此外,还计算了磁通和电荷时间积分的相图变化,从而确定了meminductance的大小。
{"title":"A Meminductor Emulator Based on Flux-controlled Model Using Field Programmable Analog Array","authors":"P. Thongdit, Surachai Chunchay, K. Angkeaw","doi":"10.1109/ecti-con49241.2020.9158116","DOIUrl":"https://doi.org/10.1109/ecti-con49241.2020.9158116","url":null,"abstract":"This paper presents a scheme of pinched hysteresis loop behavior of a proposed meminductor emulator circuit at frequency of 5 kHz, 10 kHz, and 20 kHz. The mathematical model with flux-controlled concept was chosen to apply for meminductor equation and used for creating a proposed emulator. The proposed meminductor emulator was created based on the device called Field Programmable Analog Arrays (FPAAs). The AnadigmDesigner2 software was used to simulate in order to verify the performance of proposed meminductor emulator. Moreover, the variation of phase diagram of time integral of the flux and charge were computed to determine the meminductance.","PeriodicalId":371552,"journal":{"name":"2020 17th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128889769","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: 7
期刊
2020 17th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)
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