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2020 2nd Novel Intelligent and Leading Emerging Sciences Conference (NILES)最新文献

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Optimizing SCAPS model for perovskite solar cell equivalent circuit with utilizing Matlab-based parasitic resistance estimator algorithm 利用基于matlab的寄生电阻估计算法优化钙钛矿太阳能电池等效电路的SCAPS模型
Pub Date : 2020-10-24 DOI: 10.1109/NILES50944.2020.9257929
Ahmed A. Eid, Zahraa S. Ismail, S. Abdellatif
Perovskite solar cells (PSCs) showed a booming trend due to its tunability as well as simplicity in fabrication. Researchers invested in exploring an appropriate equivalent circuit capable of describing the J-V curves of the PSCs as well as illustrating the physical phenomena associated with optical absorption and carrier transportation. In the same context, we propose a modified SCAPS model to demonstrate the optoelectronic behavior of PSCs through estimating the parasitic elements in the form of resistive and capacitive components. A previously reported PSC was selected as a reference where our enhanced model recorded only 4% mismatching. J-V, E-K and C-V curves have been simulated and analyzed where the appearance of the capacitive impact due to E-K charge accumulation has been addressed.
钙钛矿太阳能电池(PSCs)由于其可调性和制造简单而呈现出蓬勃发展的趋势。研究人员投资于探索一种合适的等效电路,能够描述psc的J-V曲线,并说明与光吸收和载流子输运相关的物理现象。在相同的背景下,我们提出了一个改进的SCAPS模型,通过估计电阻和电容元件形式的寄生元件来展示PSCs的光电行为。先前报道的PSC被选择作为参考,我们的增强模型只记录了4%的不匹配。J-V, E-K和C-V曲线进行了模拟和分析,其中解决了由于E-K电荷积累引起的电容性影响的外观。
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引用次数: 11
Blockchain-based Data Management in Vehicular Networks 基于区块链的车辆网络数据管理
Pub Date : 2020-10-24 DOI: 10.1109/NILES50944.2020.9257890
Gina El-Salakawy, Mervat Abu El-Kheir
Vehicular ad hoc networks (VANETs) are projected to be an integral component in intelligent transportation systems, poised to support road safety services via the Vehicle to Vehicle (V2V) and Vehicle to Roadside (V2R) units communication. With the evolution of technology and the growth in the number of smart vehicles, traditional VANETs face technical challenges in deployment and management due to less scalability and poor connectivity. Current smart vehicles are identified, authenticated, and connected through central cloud servers. This model will have limited scalability as the technology becomes pervasive, and the cloud servers will remain a single point of failure that can disrupt the entire network. Therefore, we need a secure distributed system to reduce the network traffic rate. In this paper, we propose a blockchain-based distributed message exchange system that will handle the exchange of safety and periodic beacon messages among vehicles. Since blockchain is characterized as being a decentralized and non-tampering system. We considered saving the safety messages only in the blockchain as they occur less than the periodic messages and they are more important. We propose to implement the blockchain per country to reduce the number of nodes/vehicles joining the network. We also reduce the block body size by using the Kademlia Distributed Hash Table (DHT) to broadcast the beacon messages. Experimental evaluation shows that the system can protect a V2V network against different attack types, such as sybil attack and alteration attack with TPR more than 95%. The experiments also show that the block body size is reduced by a factor of 1:5, which helps in broadcasting the data faster.
车辆自组织网络(VANETs)预计将成为智能交通系统的一个组成部分,通过车对车(V2V)和车对路边(V2R)单元通信支持道路安全服务。随着技术的发展和智能汽车数量的增加,传统的vanet在部署和管理方面面临着可扩展性差、连通性差的技术挑战。目前的智能汽车是通过中央云服务器进行识别、认证和连接的。随着技术的普及,这种模式的可扩展性将受到限制,而且云服务器仍将是一个单点故障,可能会破坏整个网络。因此,我们需要一个安全的分布式系统来降低网络的流量速率。在本文中,我们提出了一种基于区块链的分布式消息交换系统,该系统将处理车辆之间的安全和定期信标消息交换。因为区块链的特点是一个分散和不可篡改的系统。我们考虑只在区块链中保存安全消息,因为它们比定期消息发生的次数少,而且它们更重要。我们建议在每个国家实施区块链,以减少加入网络的节点/车辆数量。我们还通过使用Kademlia分布式哈希表(DHT)广播信标消息来减小块体大小。实验评估表明,该系统能够有效抵御不同类型的攻击,如sybil攻击和篡改攻击,TPR均在95%以上。实验还表明,块体大小减少了1:5,有助于更快地广播数据。
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引用次数: 2
Experimental Identification of Road-Vehicle Dynamics Using Autoregression 基于自回归的道路-车辆动力学实验辨识
Pub Date : 2020-10-24 DOI: 10.1109/NILES50944.2020.9257908
Karim Hafiz, M. Tawfik, H. Ibrahim
This paper presents an identification technique, for the road - vehicle dynamic behavior of suspension systems, by implementing an autoregressive system with exogenous input (ARX). The ARX model was proposed as a simple and powerful tool, in terms of accuracy and computational time, compared to the complexity and significant computational cost involved with the neural networks approach which is commonly used. An experimental approach is introduced based on training data being extracted from sensors readings which are attached to specific locations, of a real car suspension, in an attempt to capture the dynamic behavior of a quarter car model. In addition, two different ARX models were created, once by using front-left wheel excitation only and another by front and rear wheels excitations. It is found that the ARX model, based on measurements extracted from only one wheel of a real car suspension, could accurately represent the vertical dynamics of the whole vehicle.
本文提出了一种基于外生输入的自回归系统(ARX)的悬架系统道路-车辆动态特性识别技术。与常用的神经网络方法的复杂性和巨大的计算成本相比,在准确性和计算时间方面,ARX模型是一种简单而强大的工具。介绍了一种实验方法,该方法基于从附着在真实汽车悬架的特定位置的传感器读数中提取的训练数据,试图捕获四分之一汽车模型的动态行为。此外,还建立了两种不同的ARX模型,一种是仅使用左前轮激励,另一种是使用前轮和后轮激励。结果表明,ARX模型仅基于从真实汽车悬架的一个车轮中提取的测量数据,就能准确地代表整车的垂直动力学。
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引用次数: 0
Probabilistic Time Series Forecasting for Unconventional Oil and Gas Producing Wells 非常规油气生产井概率时间序列预测
Pub Date : 2020-10-24 DOI: 10.1109/NILES50944.2020.9257962
Hadeel Afifi, M. Elmahdy, M. E. Saban, Mervat Abu-Elkheir
Time-series forecasting, the process of predicting values in the future given the present and previous history, is a challenging problem to tackle. Deterministic forecasting methods were thoroughly investigated but had limitations regarding reliability. Recent research efforts are exploring the advantages that come with probabilistic forecasting. The need to have large datasets for time-series to build more generalized models and thus being less dependent on data augmentation is also driving efforts to collect comprehensive data. This paper proposes a machine learning model to estimate prediction intervals on a large oil production dataset. Prediction intervals are estimated at different percentiles. Prediction Interval Coverage Probability (PICP) and Prediction Interval Normalized Average Width (PINAW) metrics are used for performance evaluation. The best results are obtained by removing trend and using differencing.
时间序列预测,即根据当前和过去的历史预测未来价值的过程,是一个具有挑战性的问题。确定性预测方法被深入研究,但在可靠性方面存在局限性。最近的研究工作正在探索概率预测带来的优势。需要有大型时间序列数据集来构建更一般化的模型,从而减少对数据扩充的依赖,这也推动了收集全面数据的努力。本文提出了一种机器学习模型来估计大型石油生产数据集的预测区间。预测区间以不同的百分位数估计。预测区间覆盖概率(PICP)和预测区间归一化平均宽度(PINAW)指标用于性能评估。采用去趋势法和差分法得到了最好的结果。
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引用次数: 3
An MTCMOS Subthreshold-Leakage Reduction Algorithm 一种MTCMOS亚阈值泄漏降低算法
Pub Date : 2020-10-24 DOI: 10.1109/NILES50944.2020.9257933
S. Sharroush
CMOS circuits that contain multiple branches in the pull-down network (PDN) suffer from the trade-off between the leakage-power reduction and the improvement of the propagation delay. As a solution, multiple threshold voltages can be used in order to reduce the subthreshold leakage in some paths while maintaining the speed requirement in others. In this paper, a novel multiple threshold-voltage CMOS (MTCMOS) subthreshold-leakage reduction algorithm is presented that optimizes the design of CMOS circuits with several branches in the PDN. Specifically, the threshold voltages of certain devices in the PDN are increased in order to reduce the subthreshold leakage while keeping the current-driving capabilities of these devices within certain limits in order not to degrade the performance. Simulation results using the 45 nm CMOS technology confirms this reduction with no speed penalty.
在下拉网络(PDN)中包含多个支路的CMOS电路需要在降低泄漏功率和改善传播延迟之间进行权衡。作为一种解决方案,可以使用多个阈值电压,以减少某些路径的亚阈值泄漏,同时保持其他路径的速度要求。本文提出了一种新的多阈值电压CMOS (MTCMOS)亚阈值泄漏降低算法,该算法对PDN中多支路CMOS电路的设计进行了优化。具体来说,提高PDN中某些器件的阈值电压是为了减少亚阈值泄漏,同时将这些器件的电流驱动能力保持在一定范围内,以免降低性能。使用45纳米CMOS技术的仿真结果证实了这种降低,没有速度损失。
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引用次数: 1
Comparing Machine Learning Models For Predicting Water Pipelines Condition 预测水管状况的机器学习模型比较
Pub Date : 2020-10-24 DOI: 10.1109/NILES50944.2020.9257945
N. Elshaboury, M. Marzouk
The majority of water pipelines suffer severe deterioration and degradation challenges. Therefore, this research aims at developing machine learning models that forecast the structural condition of water pipelines. The models are implemented using several techniques, including multiple linear regression, feed-forward neural network, general regression neural network, and support vector regression models. The performance of the aforementioned models is evaluated by measuring the coefficient of determination and root mean squared error using cross-validation. The results show that the general regression neural network model outperforms the other models with respect to the applied metrics. The models are developed using data collected from a water distribution network in Shaker Al-Bahery, Qalyubia Governorate, Egypt. The developed model is expected to assist the water municipality in allocating budget efficiently as well as scheduling of the needed intervention strategies.
大多数输水管道都面临着严重的老化和退化问题。因此,本研究旨在开发预测输水管道结构状况的机器学习模型。模型采用多种技术实现,包括多元线性回归、前馈神经网络、一般回归神经网络和支持向量回归模型。通过交叉验证测量决定系数和均方根误差来评估上述模型的性能。结果表明,广义回归神经网络模型在应用指标方面优于其他模型。这些模型是利用从埃及Qalyubia省Shaker Al-Bahery供水网络收集的数据开发的。开发的模型预计将协助水务市政当局有效地分配预算以及安排所需的干预策略。
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引用次数: 7
Dynamic Programming Applications: A Suvrvey 动态规划应用:调查
Pub Date : 2020-10-24 DOI: 10.1109/NILES50944.2020.9257968
A. Tarek, H. Elsayed, M. Rashad, Manar Hassan, Passant El-Kafrawy
Dynamic programming is a mathematical optimization first invented in 1950s and lived till our times to make optimizations and reduce complexity in several different fields like bioinformatics, Electric vehicles, energy consumption, medical field and much more as a proof of being a powerful technique. In this paper, the various fields and aspects in which Dynamic programming has a significant contribution are surveyed.
动态规划是一种数学优化,最早发明于20世纪50年代,直到我们的时代,在生物信息学,电动汽车,能源消耗,医疗领域等多个不同领域进行优化和降低复杂性,证明了它是一种强大的技术。本文综述了动态规划在各个领域和方面的重要贡献。
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引用次数: 2
Self-Organizing Maps to Assess Rehabilitation Progress of Post-Stroke Patients 自组织地图评估脑卒中后患者康复进展
Pub Date : 2020-10-24 DOI: 10.1109/NILES50944.2020.9257927
Hussein Sarwat, M. Awad, S. Maged, Hassan Sarwat
The scarcity of adequate rehabilitation and treatment centers for post-stroke patients, a relatively common disease among the Egyptian populace, and the lack of awareness and trained physiotherapists, causes many patients to forgo treatment until they are transported to the hospital. Even then, the high cost of treatment will impede most rehabilitation attempts to those who survive. Thankfully, rehabilitation robotics can be used to replace the need for trained physiotherapists. This paper uses the Myo armband as a rehabilitation assessment device, tracking the progress of Post-Stroke patients and comparing them with healthy subjects. By taking a total of 60 samples from 3 healthy subjects and using self-organizing maps, a clustering system that can differentiate between regular and irregular motions using kinematic data with less than 10% error was produced.
中风后患者是埃及民众中比较常见的疾病,由于缺乏适当的康复和治疗中心,再加上缺乏认识和训练有素的物理治疗师,导致许多患者在被送往医院之前放弃治疗。即便如此,高昂的治疗费用仍将阻碍那些幸存者的大多数康复尝试。值得庆幸的是,康复机器人可以用来取代对训练有素的物理治疗师的需求。本文采用Myo臂带作为一种康复评估装置,跟踪脑卒中后患者的康复进展,并与健康受试者进行比较。通过从3名健康受试者中抽取60个样本,并使用自组织图,产生了一个可以使用运动学数据区分规则和不规则运动的聚类系统,误差小于10%。
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引用次数: 2
A Novel Optical Micro Ring Resonator Biosensor Design using Lithium Niobate on Insulator (LNOI) to Detect The Concentration of Glucose 利用绝缘体上铌酸锂(LNOI)检测葡萄糖浓度的新型光学微环谐振器生物传感器设计
Pub Date : 2020-10-24 DOI: 10.1109/NILES50944.2020.9257944
Md Ashif Uddin, M. Maswood, Uzzwal Kumar Dey, Abdullah G. Alharbi, Moriom Akter
Sensing is not only essential but also unavoidable in the medical fields to analyze different types of biological samples for diagnostic purposes. Although, the conventional laboratory based sensing method provides high accuracy, sometimes, it is not suitable in terms of cost, sensing time, and amount of samples needed for sensing. In this work, we design a novel optical micro ring resonator biosensor utilizing the properties of lithium niobate (LiNbO3) on insulator (LNOI) to detect the concentration of glucose in blood and urine. Optical micro ring resonator attracts researchers in the biomedical field for their compactness, tenability, and low cost. Moreover, LNOI offers some special properties like favorable optical, mechanical, pieozoelectrical, photoelastic, photorefractive, and photovoltaic properties. First, various samples of devices were designed in COMSOL to perform the modal analysis. Then, these devices were implemented in Opti-FDTD to evaluate the performance of the sensor. By varying different parameters like rib height and width, we optimized the structure of the device where rib height, rib width, top layer width of LiNbO3, ring radius, and the distance between ring and waveguide are 0.56 µm, 0.5 µm, 0.16 µm, 15 µm, and approximately 70 to 80 nm, respectively. This optimized structure shows high quality (Q) factor, sharp resonance wavelength, and more distance between two resonance wavelengths of two different concentration of glucose. For sensing purpose, Gaussian modulated continuous wave of 1545 nm wavelength was used as input and best results in output were obtained at 1250 to 1280 nm wavelength.
在医学领域,为了分析不同类型的生物样本以进行诊断,传感不仅是必不可少的,而且是不可避免的。传统的基于实验室的传感方法虽然具有较高的精度,但有时在成本、传感时间和传感所需的样本量等方面并不适用。在这项工作中,我们设计了一种新型的光学微环谐振器生物传感器,利用铌酸锂(LiNbO3)在绝缘体(LNOI)上的特性来检测血液和尿液中的葡萄糖浓度。光学微环谐振器以其紧凑、耐用、低成本等优点吸引了生物医学领域的研究人员。此外,LNOI还具有良好的光学、机械、压电、光弹性、光折变和光伏性能等特殊性能。首先,在COMSOL中设计了各种器件样品,进行了模态分析。然后,在Opti-FDTD中实现了这些器件,以评估传感器的性能。通过改变肋高和宽度等参数,优化了器件结构,肋高为0.56µm,肋宽为0.5µm, LiNbO3顶层宽度为0.16µm,环半径为15µm,环与波导之间的距离约为70 ~ 80 nm。优化后的结构具有高质量(Q)因子,共振波长尖锐,两种不同浓度葡萄糖的共振波长之间的距离更大的特点。出于传感目的,采用1545 nm波长的高斯调制连续波作为输入,在1250 ~ 1280 nm波长处输出效果最好。
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引用次数: 2
Sign Language Interpreter System: An alternative system for machine learning 手语翻译系统:机器学习的替代系统
Pub Date : 2020-10-24 DOI: 10.1109/NILES50944.2020.9257958
Salma A. Essam El-Din, Mohamed A. Abd El-Ghany
Losing the ability to speak exerts psychological and social impacts on the affected people due to the lack of proper communication. Thus, Sign Language (SL) is considered a boon to people with hearing and speech impairment. SL has developed as a handy mean of communication that form the core of local deaf cultures. It is a visual–spatial language based on positional and visual components, such as the shape of fingers and hands, their location and orientation as well as arm and body movements. The problem is that SL is not understood by everyone, forming a communication gap between the mute and the able people. Multiple and systematic scholarly interventions that vary according to context have been implemented to overcome disability-related difficulties. Sign language recognition (SLR) systems based on sensory gloves are significant innovations that aim to procure data on the shape or movement of the human hand to bridge this communication gap, as the proposed system. The proposed model is a glove equipped with five flex sensors, interfacing with a control unit fixed on the arm, translating American Sign Language (ASL) and Arabic Sign Language (ArSL) to both text and speech, displayed on a simple Graphical User Interface (GUI). The proposed system aims to provide an affordable and user friendly SL translator system, working on the basis of Machine Learning (ML). However, it adapts to each person’s hand instead of using a generic data set. The system achieved 95% recognition rate with static gestures and up to 88% with dynamic gestures.
由于缺乏适当的沟通,失去说话能力对受影响的人产生了心理和社会影响。因此,手语(SL)被认为是听力和语言障碍人士的福音。SL已经发展成为一种方便的交流方式,形成了当地聋人文化的核心。它是一种基于位置和视觉成分的视觉空间语言,例如手指和手的形状,它们的位置和方向以及手臂和身体的运动。问题是,并不是每个人都能理解SL,在哑巴和有能力的人之间形成了沟通鸿沟。为了克服与残疾有关的困难,已经实施了根据具体情况而有所不同的多种系统的学术干预措施。基于感应手套的手语识别(SLR)系统是一项重大创新,旨在获取人类手的形状或运动数据,以弥合这种交流差距,正如所提出的系统。所提出的模型是一种配备了五个柔性传感器的手套,与固定在手臂上的控制单元相连接,将美国手语(ASL)和阿拉伯手语(ArSL)翻译成文本和语音,显示在一个简单的图形用户界面(GUI)上。拟议的系统旨在提供一个经济实惠且用户友好的SL翻译系统,以机器学习(ML)为基础。然而,它适应每个人的手,而不是使用通用的数据集。该系统对静态手势的识别率达到95%,对动态手势的识别率高达88%。
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引用次数: 14
期刊
2020 2nd Novel Intelligent and Leading Emerging Sciences Conference (NILES)
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