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2016 5th International Conference on Electronic Devices, Systems and Applications (ICEDSA)最新文献

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Comparative analysis of power amplifiers' polynomial based models identification using RLS algorithm 基于RLS算法的功率放大器多项式模型辨识的比较分析
A. Abdelhafiz, F. Ghannouchi, O. Hammi, A. Zerguine
This paper investigates the performance of RF power amplifiers' behavioral models in the context of the adaptive model coefficients' identification. The forward twin-nonlinear two-box (TNTB) model is compared to the memory polynomial and orthogonal memory polynomial models. The study, performed using measured data of a Doherty power amplifier prototype driven by multi-carrier signals, highlights the complexity reduction provided by the TNTB model in comparison with the two other models. The results show the superiority of the TNTB model in the context of adaptive parameter-estimation as it leads to better normalized mean squared error while requiring a substantially lower number of parameters. Furthermore, the TNTB model requires less parameters for its identification, and thus less power consumption for its estimation. This makes this model suitable for implementation in energy efficient green communication systems.
本文在自适应模型系数辨识的背景下,研究了射频功率放大器行为模型的性能。将前向双非线性双盒(TNTB)模型与记忆多项式模型和正交记忆多项式模型进行了比较。该研究使用多载波信号驱动的Doherty功率放大器原型的测量数据进行,与其他两种模型相比,突出了TNTB模型提供的复杂性降低。结果表明,TNTB模型在自适应参数估计方面具有优势,因为它可以在需要更少的参数的同时获得更好的归一化均方误差。此外,TNTB模型需要较少的参数进行识别,从而减少了其估计的功耗。这使得该模型适合在节能绿色通信系统中实施。
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引用次数: 1
Techniques to deal with missing data 处理丢失数据的技术
Jadran Sessa, Dabeeruddin Syed
Data is available to us in humongous amounts in the real world, but none of it is of practical use if not converted to useful information. However, the knowledge discovery is hindered because the real data is often incomplete and noisy. Nowadays, the problem of recovering missing data has found most important place in the field of data mining. Filling the missing data is a significant task, as it is paramount to use all available data for the given datasets are generally very small. In this paper, we deal with the real data with many missing values. Furthermore, we deal with the given data in three phases. The first phase considers the concept of feature selection, while the second phase iteratively considers filling in the missing values using probabilistic approach, keeping in mind the fact that features can be either nominal or numerical. Finally, the third phase deals with correcting the missing values that have been filled in. In our work, we have compared two imputation methods for dealing with the missing data, namely k-NN imputation method and mean and median imputation method. As a result, we have found that both of the imputation methods are efficient and yield more or less the same accuracy.
在现实世界中,我们可以获得大量的数据,但如果不转化为有用的信息,这些数据就没有任何实际用途。然而,由于实际数据往往是不完整的和有噪声的,阻碍了知识的发现。目前,丢失数据的恢复问题在数据挖掘领域中占有重要的地位。填充缺失的数据是一项重要的任务,因为对于通常非常小的给定数据集来说,使用所有可用的数据是至关重要的。在本文中,我们处理具有许多缺失值的真实数据。此外,我们分三个阶段处理给定的数据。第一阶段考虑特征选择的概念,而第二阶段迭代地考虑使用概率方法填充缺失值,记住特征可以是标称的也可以是数值的。最后,第三阶段处理已填写的缺失值的更正。在我们的工作中,我们比较了两种处理缺失数据的插值方法,即k-NN插值方法和均值和中位数插值方法。结果,我们发现这两种方法都是有效的,并产生或多或少相同的精度。
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引用次数: 35
Adaptive FIR filter for frequency estimation of sinusoids using particle swarm optimization 基于粒子群优化的自适应FIR滤波器用于正弦波频率估计
F. B. Elissa, M. Mismar
A new frequency estimation method which detects frequencies of unknown number of source sinusoidal signals is suggested. The system contains an adaptive finite impulse response filter (FIR) which exploits one of a several random search algorithms, particle swarm optimization (PSO). PSO will work on minimizing the overall output power by finding the frequencies of the roots on the unit circle. The pseudo spectrum is achieved by frequency elimination of the roots and is used to estimate the frequency of the source signals along with their number. After estimating the frequencies of the undesired interfering signals, the system can then work on suppressing these signals and maintaining the strength of the desired signals.
提出了一种检测未知源正弦信号频率的频率估计方法。该系统包含一个自适应有限脉冲响应滤波器(FIR),该滤波器利用了几种随机搜索算法之一——粒子群优化算法(PSO)。PSO将通过在单位圆上找到根的频率来最小化总输出功率。伪谱是通过根的频率消除来实现的,并用于估计源信号的频率及其数量。在估计不需要的干扰信号的频率后,系统可以继续抑制这些信号并保持所需信号的强度。
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引用次数: 3
Accuracy/speed trade-off technique for dynamic programing based algorithms 基于动态规划算法的精度/速度权衡技术
Talal Bonny
Although the dynamic programming algorithm is an optimization approach used to solve a complex problem fast, the time required to solve it is still not efficient and grows exponentially as a function of the size of the input. In this contribution, we improve the computation time of the dynamic programing based algorithms by proposing new acceleration technique which splits the compared sequences into segments and then applies the dynamic programming algorithm to each segment individually. The new technique is adjustable for either the alignment accuracy or the computation speed. The results show that our technique performs much faster than the conventional dynamic programming algorithm with a slight degradation in the performance and provides much accurate results than the heuristic algorithm based on number of segments.
虽然动态规划算法是一种用于快速求解复杂问题的优化方法,但求解该问题所需的时间仍然不高效,并且作为输入大小的函数呈指数增长。在这篇论文中,我们提出了一种新的加速技术,将比较序列分割成片段,然后对每个片段分别应用动态规划算法,从而提高了基于动态规划算法的计算时间。新技术可以调整校准精度或计算速度。结果表明,该方法在性能略有下降的情况下,比传统的动态规划算法运行速度快得多,并且比基于段数的启发式算法提供了更准确的结果。
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引用次数: 1
Coding brain neurons via electrical network models for neuro-signal synthesis in computational neuroscience 基于电网络模型的脑神经元编码在计算神经科学中的神经信号合成
Salhah Albreiki, A. Alali, R. Shubair
This paper develops a methodology for modeling and analysis of neural excitability that forms one of the most extensively studied mathematical frameworks in computational neuroscience. This framework is described by a set of differential equations known as Hodgkin-Huxley model and it synthesizes the influence of ionic currents on the cell voltage. The electrical equivalent circuit and the derivation of the conductance-based model of a neuron is based on a mathematical model that utilizes Hodgkin-Huxley equations which are considered as the single most influential finding in the biophysical description of excitable membranes to implement the current research in neurosciences. The neuron response with varying currents is demonstrated through analytical results and numerical simulations. The investigations in this paper lay the foundation for further deeper study and higher-order network models that can help eventually, through simulation and prediction, in the therapeutic treatment of brain diseases such as Alzheimer and Parkinson.
本文开发了一种建模和分析神经兴奋性的方法,形成了计算神经科学中最广泛研究的数学框架之一。该框架由一组称为霍奇金-赫胥黎模型的微分方程描述,它综合了离子电流对电池电压的影响。等效电路和神经元电导模型的推导基于一个数学模型,该模型利用霍奇金-赫胥黎方程,该方程被认为是可兴奋膜生物物理描述中最具影响力的单一发现,以实现当前神经科学的研究。通过分析结果和数值模拟验证了不同电流下神经元的响应。本文的研究为进一步深入研究和建立高阶网络模型奠定了基础,这些模型最终可以通过模拟和预测,帮助老年痴呆症和帕金森等脑部疾病的治疗。
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引用次数: 2
Design and implementation of a sign-to-speech/text system for deaf and dumb people 为聋哑人设计和实现一个手语转语音/文字系统
Dalal Abdulla, Shahrazad Abdulla, Rameesa Manaf, A. Jarndal
This paper presents an approach for designing and implementing a smart glove for deaf and dumb people. There have been several researches done in order to find an easier way for non-vocal people to communicate with vocal people and express themselves to the hearing world. Developments have been made in sign language but mainly in American Sign Language. This research aims to develop a sign to Arabic language translator based on smart glove interfaced wirelessly with microcontroller and text/voice presenting devices. An approach has been developed and programmed to display Arabic text. The whole system has been implemented, programmed, cased and tested with very good results.
本文提出了一种设计和实现聋哑人智能手套的方法。为了找到一种更容易让不会说话的人与会说话的人交流并向听觉世界表达自己的方式,已经进行了一些研究。手语有了发展,但主要是美国手语。本研究旨在开发一种基于智能手套与微控制器和文本/语音呈现设备无线接口的手语到阿拉伯语翻译器。已经开发并编写了显示阿拉伯文本的方法。整个系统已经实现、编程、算例和测试,取得了很好的效果。
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引用次数: 19
Analysis and design of MIMO antenna for UWB applications based on the super-formula 基于超公式的超宽带MIMO天线分析与设计
Shaimaa Naser, N. Dib
In this paper, a MIMO antenna of size 52 × 35 × 1.6 mm3 for UWB applications is designed and analyzed. A separate ground plane antenna elements are set beside each other on top of FR-4 substrate. Each single antenna element is designed through varying the main six parameters that describe the super-formula. The antenna elements are fed through a microstrip feeding line. A full-wave simulator is used to simulate the antenna then it is fabricated and tested. Experimental and simulation results are in good agreement and each antenna element works in the band (3.1 GHz–12 GHz) which is in the UWB frequency range with VSWR less than 2. Also, the isolation between the two elements is less than −15 dB. In addition, they have a good advantage of having almost constant group delay and gain.
本文设计并分析了一种尺寸为52 × 35 × 1.6 mm3的超宽带MIMO天线。一个单独的地平面天线元件被设置在FR-4基板的顶部,彼此相邻。通过改变描述超级公式的六个主要参数来设计每个天线单元。天线元件通过微带馈线馈电。利用全波模拟器对天线进行仿真,并对天线进行制作和测试。实验与仿真结果吻合良好,各天线单元工作在超宽带频段(3.1 GHz - 12 GHz)内,驻波比小于2。此外,两个元件之间的隔离小于- 15 dB。此外,它们还具有几乎恒定的群延迟和增益的优点。
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引用次数: 2
Performance analysis of transistor-based circuits through TAMAMS Web: From bulk to molecular devices 通过TAMAMS网络进行晶体管电路的性能分析:从体积器件到分子器件
Izhar Hussain, F. Riente, M. R. Roch, G. Piccinini, M. Graziano
To meet the challenges associated with transistor scaling and short channel devices, the structure of MOS devices has undergone an incredible evolution. From Bulk devices, technology has shifted through Silicon-On-Insulator (SOI) devices, reaching now FinFET transistors, the next steps in the evolutionary path are represented by Gate-All-Around (GAA) and Molecular Transistors. Using analytical compact models for standard (BULK, SOI, FinFET) and emerging devices (GAA, Molecular FET (MOLFET)), it is possible to predict the system level performance of future NANO electronic circuits. In this work, we show how circuit's performance can be predicted and analyzed at system level using our tool, TAMTAMS Web. Starting from Bulk transistors down to a nanometer scale Molecular FET, TAMTAMS Web incorporates models to analyze device quantities (Drive current, Subthresold current…) up to system level. We have developed a compact model of Virtex 4 FPGA CLB block that is used as benchmark. The work here presented not only highlights the potentialities of TAMTAMS, but it also provides useful hints on the evolution of transistor based technology.
为了应对与晶体管缩放和短沟道器件相关的挑战,MOS器件的结构经历了令人难以置信的发展。从体器件开始,技术已经通过绝缘体上硅(SOI)器件转移到现在的FinFET晶体管,进化路径的下一步是栅极全能(GAA)和分子晶体管。使用标准(BULK, SOI, FinFET)和新兴器件(GAA, Molecular FET (MOLFET))的分析紧凑模型,可以预测未来纳米电子电路的系统级性能。在这项工作中,我们展示了如何使用我们的工具TAMTAMS Web在系统级预测和分析电路的性能。从体积晶体管到纳米尺度的分子场效应管,TAMTAMS Web包含模型来分析器件数量(驱动电流,亚阈值电流…)直到系统级。我们开发了一个紧凑的Virtex 4 FPGA CLB模块模型作为基准。这里提出的工作不仅突出了TAMTAMS的潜力,而且还为基于晶体管的技术的发展提供了有用的提示。
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引用次数: 2
High-speed dielectric-planarized 850nm surface-emitting lasers with metal-plated heat sinks 高速介质平面化850纳米表面发射激光器,配有镀金属散热器
A. N. Al-Omari, O. M. Khreis, A. Dagamseh, A. Ababneh, K. Lear
850-nm vertical-cavity laser diodes with copper-plated heat sinks were fabricated and tested. Vertical-cavity surface-emitting lasers with 10μm aperture diameter and 4μm of electroplated copper demonstrated a maximum −3dB modulation bandwidth of more than 16GHz and a resonance frequency of more than 11GHz at bias current of only 5.4mA, which correspond to a bias current density of only 7.5kA/cm2. Thus, reported devices exhibited a high −3dB modulation bandwidth squared over bias current density ratio of more than 35GHz2/kA/cm2. The displayed 7.5 kA/cm2 bias current density is less than the 10 kA/cm2 current density standard for reliability by 25%. Devices also demonstrate a reduced thermal resistance of 1.01 °C/mW, a threshold current of 1.1mA, a series resistance of only 60Ω, and a maximum output power density of about 1.2mW/cm2.
制备了850 nm镀铜散热器垂直腔激光二极管,并对其进行了测试。孔径为10μm、电镀铜厚度为4μm的垂直腔面发射激光器,在偏置电流仅为5.4mA时,最大- 3dB调制带宽大于16GHz,谐振频率大于11GHz,对应的偏置电流密度仅为7.5kA/cm2。因此,所报道的器件表现出高- 3dB调制带宽平方超过偏置电流密度比35GHz2/kA/cm2。显示的7.5 kA/cm2偏置电流密度比可靠性的10 kA/cm2电流密度标准低25%。器件的热阻降低到1.01°C/mW,阈值电流为1.1mA,串联电阻仅为60Ω,最大输出功率密度约为1.2mW/cm2。
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引用次数: 1
Modeling worm propagation in the advanced metering infrastructure 蠕虫在高级计量基础设施中的传播建模
Anas AlMajali, Waleed Dweik
A computer worm is malicious software that can spread rapidly between interconnected devices and perform malicious actions. In an Advanced Metering Infrastructure (AMI), smart meters may communicate in an ad-hoc fashion to perform many functionalities like remote metering and demand response. However, the AMI is susceptible to cyber-physical threats caused by malware like worms. The speed at which worms propagate in the AMI affects the physical consequences of cyber attacks. In this paper, worm propagation in the AMI is simulated and a probabilistic model is derived. This model can be used to estimate the time required to infect N meters in the AMI and accordingly predict possible physical consequences.
计算机蠕虫是一种恶意软件,可以在相互连接的设备之间快速传播并执行恶意操作。在高级计量基础设施(Advanced Metering Infrastructure, AMI)中,智能电表可以以一种特别的方式进行通信,以执行远程计量和需求响应等许多功能。然而,AMI很容易受到蠕虫等恶意软件造成的网络物理威胁。蠕虫在AMI中传播的速度会影响网络攻击的物理后果。本文模拟了蠕虫在AMI中的传播,并推导了一个概率模型。该模型可用于估计AMI内感染N米所需的时间,并据此预测可能的物理后果。
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引用次数: 2
期刊
2016 5th International Conference on Electronic Devices, Systems and Applications (ICEDSA)
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