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2017 International Conference on Computer, Communications and Electronics (Comptelix)最新文献

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An analysis on broadband SHG using TIR-QPM in a multi-tapered slab of ZnSe in mid-IR region 用TIR-QPM分析中红外区域ZnSe多锥板的宽带SHG
Pub Date : 2017-07-01 DOI: 10.1109/COMPTELIX.2017.8004008
Bhaswati Medhi, S. Deb
An enhanced broadband conversion scheme is analytically described in a multi-tapered profiled Zinc Selenide (ZnSe) slab for Second Harmonic Generation (SHG) using Total Internal Reflection Quasi Phase Matching (TIR-QPM) with due consideration to the optical losses (absorption losses, reflection losses and Goos-Hänchen shift). The effects of variation of the tapering angles and the vertical heights of the ZnSe slab has been studied for generated SHG. Optimizing these parameters, a wider broadband frequency converter with appreciable conversion efficiency can be designed.
在考虑光损耗(吸收损耗、反射损耗和Goos-Hänchen位移)的情况下,利用全内反射准相位匹配(TIR-QPM),分析描述了一种用于二次谐波产生(SHG)的多锥型硒化锌(ZnSe)板的增强型宽带转换方案。研究了ZnSe板锥度角和垂直高度的变化对产生的SHG的影响。通过对这些参数的优化,可以设计出具有可观转换效率的更宽的宽带变频器。
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引用次数: 0
Modeling and outage analysis of multiple relayed hybrid VLC-RF system 多中继混合VLC-RF系统建模及中断分析
Pub Date : 2017-07-01 DOI: 10.1109/COMPTELIX.2017.8003974
Anshul Vats, Mona Aggarwal, Swaran Ahuja
In this research paper, we proposed a dual-hop multiple relayed hybrid visible light communication (VLC)-radio frequency (RF) system model which provide fast and secure communication link between hospital and distant laboratory for transmitting the patient's information. In this model information is transmitted from the smart monitoring devices in the form of optical signal via VLC channel towards the array of decode and forward (DF) relays placed on the ceiling of the room in a parallel fashion. A best relay is selected on the basis of the end-to-end signal to noise ratio (SNR) from source to destination. The selected relay then convert and decode the optical signal into its corresponding RF signal and further transmit it to the distant laboratory via RF channel. We first derive the statistical expressions of probability distribution functions (PDF) and cumulative distribution function (CDF) of the end to end signal to noise ratio (SNR) of the dual hop channel. Then, we use these statistical expressions to obtain closed form analytical expression of outage probability of the dual-hop parallel relayed hybrid VLC-RF system. Finally, we investigate the effect of various parameters on the system performance through numerical simulations in MatLab.
本文提出了一种双跳多中继混合可见光通信(VLC)-射频(RF)系统模型,为医院和远程实验室之间提供快速、安全的通信链路,以传输患者信息。在该模型中,信息以光信号的形式从智能监控设备通过VLC通道以并行方式向放置在房间天花板上的解码和转发(DF)继电器阵列传输。根据从信号源到目的地端到端的信噪比选择最佳中继。然后所选继电器将所述光信号转换解码为其相应的射频信号,并进一步通过射频信道传输到远程实验室。首先推导了双跳信道端到端信噪比的概率分布函数(PDF)和累积分布函数(CDF)的统计表达式。然后,我们利用这些统计表达式得到了双跳并联中继混合VLC-RF系统中断概率的封闭解析表达式。最后,在MatLab中通过数值仿真研究了各参数对系统性能的影响。
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引用次数: 6
Vehicle service date prediction system using lubricant viscosity degradation pattern 基于润滑油粘度退化模式的车辆服役日期预测系统
Pub Date : 2017-07-01 DOI: 10.1109/COMPTELIX.2017.8004003
A.J.M Dayawantha, I. Premaratne
Vehicle maintenance is a very important subject in using vehicles and proper maintenance directly affects to its longevity. This research was done to identify the real condition of a vehicle to service that vehicle on time with a service date prediction system. Engine oil ageing has been selected as the most affecting parameter to the service requirement. The viscosity of engine oil has been selected as the measurement of engine oil ageing. From the linear regression, the engine oil degradation pattern is predicted and thereby identified the next service date advancements. The driver is informed by alert system to remind the remaining days to the next service date.
车辆保养是车辆使用中一个非常重要的课题,保养得当直接影响到车辆的使用寿命。本研究利用服务日期预测系统来识别车辆的真实状况,以便按时对该车辆进行服务。机油老化是影响发动机使用要求的主要参数。选用机油粘度作为衡量机油老化的指标。通过线性回归,预测了发动机润滑油的退化模式,从而确定了下一个使用日期的提前。驾驶者会收到警报系统的通知,提醒他们离下一个服务日期还有剩余的日子。
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引用次数: 2
MarS: A rule-based stemmer for morphologically rich language Marathi 一个基于规则的词干,用于词法丰富的马拉地语
Pub Date : 2017-07-01 DOI: 10.1109/COMPTELIX.2017.8004036
H. Patil, A. Patil
Stemming is a technique that transforms morphologically similar terms into a unique term without doing a complete morphological analysis. Stemming is used as a preprocessing step in many Natural Language Processing (NLP) applications like Information retrieval (IR), Machine Translation, Parsing, Summarization, etc. The present work explores the application of stemming to the task of information retrieval. In IR, stemming is generally used for two main purposes: decreasing index size and for increasing system performance. This paper presents a stemmer for Marathi language which uses rule-based technique. The average accuracy achieved by the proposed stemmer is 79.97% when tested on a collection of 4500 unique words from the news corpus among nine runs. Since the accuracy of the proposed stemmer is satisfactory it can be effectively useful in several NLP systems for Marathi language.
词干提取是一种不用进行完整的词形分析就能将词形相似的词转换成独特的词的技术。词干提取在许多自然语言处理(NLP)应用中用作预处理步骤,如信息检索(IR)、机器翻译、解析、摘要等。本文探讨了词干提取在信息检索任务中的应用。在IR中,词干提取通常用于两个主要目的:减少索引大小和提高系统性能。本文提出了一种基于规则的马拉地语词干系统。在9次运行中,对来自新闻语料库的4500个唯一单词进行测试,所提出的词干的平均准确率为79.97%。由于所提出的词干的准确度令人满意,它可以有效地用于几种马拉地语的NLP系统。
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引用次数: 12
Short term wind speed forecasting and wind energy estimation: A case study of Rajasthan 短期风速预报与风能估算:以拉贾斯坦邦为例
Pub Date : 2017-07-01 DOI: 10.1109/COMPTELIX.2017.8003978
Chinnu M. Baby, K. Verma, R. Kumar
Wind power has increased in recent years to meet the growing energy demand. Accurate short term wind energy forecast is important for optimal scheduling of the wind farms. Increasing the accuracy can help the power system operators to increase the reliability of energy supply. A Nonlinear Autoregressive Network with Exogenous Inputs (NARX) Network is applied to predict hourly wind speed and power. Meteorological variables are taken as exogenous variables for wind speed prediction. Geographical area under study is Jaisalmer in Rajasthan. Wind data is obtained for this location from National Renewable Energy Laboratory (NREL) for one year. Comparison of the wind speed prediction of NARX model with linear regression and persistence model is also carried out. The performance of the test results is done using statistical error measurements like MAE, RMSE and MAPE. The results obtained with NARX network are found to be promising.
近年来,风力发电不断增加,以满足日益增长的能源需求。准确的短期风能预测对风电场优化调度具有重要意义。提高准确度可以帮助电力系统操作员提高供电的可靠性。采用非线性自回归外生输入网络(NARX)进行逐时风速和功率预测。风速预报采用气象变量作为外生变量。正在研究的地理区域是拉贾斯坦邦的斋萨尔梅尔。风能数据是从国家可再生能源实验室(NREL)获得的,为期一年。并将NARX模型与线性回归模型和持续模型的风速预测结果进行了比较。测试结果的性能是使用统计误差测量如MAE, RMSE和MAPE来完成的。用NARX网络得到的结果是有希望的。
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引用次数: 6
Optic switch based on Lithium Niobate photonic crystal structure without defect 基于无缺陷铌酸锂光子晶体结构的光开关
Pub Date : 2017-07-01 DOI: 10.1109/COMPTELIX.2017.8004030
Zaineb Gharsallah, M. Najjar, V. Janyani
In this report, the transmission characteristics of 2-dimensional photonic crystal optical switching are studied. Our structure is consisting of a nonlinear photonic crystal structure without defect, in which we achieve optimal switch effect by adjusting the input power. Owing to the optically modification of the refractive index of Lithium Niobate, we demonstrate an optic switch built on the shift of photonic band gap edge.
本文研究了二维光子晶体光开关的传输特性。我们的结构由无缺陷的非线性光子晶体结构组成,通过调节输入功率达到最佳开关效果。通过对铌酸锂的折射率进行光学修饰,我们展示了一种基于光子带隙边缘位移的光开关。
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引用次数: 4
Halftone visual cryptography for color images 彩色图像的半色调视觉密码术
Pub Date : 2017-07-01 DOI: 10.1109/COMPTELIX.2017.8003979
Shivani Pahuja, Singara Singh Kasana
Visual cryptographic schemes (VCS) allow one(at the sender side) to encrypt a secret picture (image) into different share images. Here no share image does uncovers any knowledge concerning to the original secret image. This work proposes visual cryptography encryption framework by using an algorithm developed by Floyd and Steinberg's for error diffusion for grayscale as well as color images. Floyd Steinberg diffusion technique continuously delivers(generates) delighting colored halftoned images for our natural vision system of humans. A color image to be protected is taken as input and then this image is decomposed into three separate monochromatic images based on CMY color space. The computer simulation demonstrates that the visual nature and tone (in terms of quality) of the acquired halftoned shares is acceptable.
视觉加密方案(VCS)允许一个(在发送端)将一个秘密图片(图像)加密成不同的共享图像。这里没有共享图像会泄露任何关于原始秘密图像的知识。这项工作提出了视觉密码学加密框架,使用由Floyd和Steinberg开发的算法,用于灰度图像和彩色图像的错误扩散。Floyd Steinberg扩散技术不断为我们人类的自然视觉系统提供(生成)令人愉悦的彩色半色调图像。以待保护的彩色图像为输入,基于CMY色彩空间将该图像分解为三个独立的单色图像。计算机模拟表明,所获得的半色调份额的视觉性质和色调(就质量而言)是可以接受的。
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引用次数: 10
Distributed cooperative spectrum sensing over different fading channels in cognitive radio 认知无线电中不同衰落信道的分布式协同频谱感知
Pub Date : 2017-07-01 DOI: 10.1109/COMPTELIX.2017.8003947
Girraj Sharma, Ritu Sharma
Spectrum sensing is the important aspect of cognitive radio (CR). In order to use the vacant spectrum, cognitive radio user must be able to identify the presence of empty spectrum efficiently. A non-cooperative spectrum sensing faces the problem of shadowing and hidden terminal due to which the CR user fails to monitor the vacant spectrum. To solve the problem of hidden terminal and shadowing in non-cooperative spectrum sensing, cooperative spectrum sensing (CSS) is used. CSS can be divided in two categories, centralised and distributed. In this paper comparison of centralised and distributed CSS is presented and a cluster based distributed CSS is proposed to improve the performance of spectrum sensing. Mathematical formulas are derived for the different fusion rules for cluster based CSS, further the performance of centralised and distributed CSS is investigated for different fading channels. It is found that performance over Nakagami channels is better than Rayleigh and Rician fading channels.
频谱感知是认知无线电的一个重要方面。为了利用空频谱,认知无线电用户必须能够有效地识别空频谱的存在。非合作频谱感知面临遮蔽和终端隐藏的问题,导致CR用户无法监控空频谱。为了解决非合作频谱感知中的终端隐藏和阴影问题,采用了合作频谱感知(CSS)技术。CSS可以分为集中式和分布式两类。本文对集中式和分布式云存储系统进行了比较,提出了一种基于集群的分布式云存储系统来提高频谱感知性能。推导了基于聚类CSS的不同融合规则的数学公式,并进一步研究了集中式和分布式CSS在不同衰落信道下的性能。研究发现,在中川信道上的性能优于瑞利信道和瑞利信道。
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引用次数: 8
Optimization of highly nonlinear soft glass photonic crystal fiber with high birefringence 高双折射高非线性软玻璃光子晶体光纤的优化设计
Pub Date : 2017-07-01 DOI: 10.1109/COMPTELIX.2017.8004043
Ritesh Chandra Suryavanshi, A. Ghunawat, Sanjeev Jain, G. Singh
This paper presents optimization of a highly nonlinear soft glass photonic crystal fiber (PCF) design with decagonal structure. In the core of PCF an elliptical air hole is designed to increase birefringence. Investigation of nonlinear coefficient of PCF design for various parameters is done using finite element method (FEM). Nonlinear coefficient of 282.83 W−1km−1 and 486.26 W−1km−1 for X and Y polarized mode respectively, and birefringence of 0.0289 is achieved at 1550 nm for the given structure. In addition to these two parameters, dispersion is found to be −507.695 ps/nm.km (X polarized mode) and −234.431 ps/nm.km (Y polarized mode) at 1550 nm.
提出了一种高度非线性的十角形软玻璃光子晶体光纤的优化设计方法。在PCF的核心设计了一个椭圆的空气孔,以增加双折射。采用有限元法研究了不同参数下PCF设计的非线性系数。X和Y偏振模式下的非线性系数分别为282.83 W−1km−1和486.26 W−1km−1,在1550 nm处的双折射系数为0.0289。除了这两个参数外,色散为- 507.695 ps/nm。km (X偏振模式)和- 234.431 ps/nm。km (Y偏振模式)在1550 nm。
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引用次数: 1
The winning strategy of Tic Tac Toe Game model by using Theoretical Computer Science 基于理论计算机科学的井字游戏制胜策略模型
Pub Date : 2017-07-01 DOI: 10.1109/COMPTELIX.2017.8003944
S. Garg, Dalpat Songara, S. Maheshwari
Tic-Tac-Toe Game is a very popular game played by two participants on the grid of 3 by 3. A special symbol (X or O) is assigned to each participant to indicate that the slot is covered by the respective participant. The winner of the game is the participant who first cover a horizontal, vertical or diagonal row of the board having only their symbols. This paper proposed a winning strategy of Tic-Tac-Toe game and its computation is proved theoretically by the concepts of Theoretical Computer Science using multi-tape turing machine. This algorithm is designed for computer as a player in which computer act according to the intelligence of model to maximize the chances of success. The human player can makes its own choices. Any of the player can play first by their choice. The computation rules ensures selection of best slot for computer that will lead to win or prevent opponent to make a winning move. This is extended work of the paper “The Winner Decision Model of Tic-Tac-Toe Game by using Multi-Tape Turing Machine”. The contribution of this work is to design a strategy to play Tic-Tac-Toe game in which computer will never lose.
井字游戏是一种非常流行的游戏,由两名参与者在3乘3的网格上玩。一个特殊的符号(X或O)被分配给每个参与者,以表示该插槽由各自的参与者覆盖。游戏的赢家是第一个覆盖水平,垂直或对角线的棋盘上只有他们的符号的参与者。本文提出了一种井字游戏的制胜策略,并利用多磁带图灵机,运用理论计算机科学的概念对其计算进行了理论证明。该算法是为计算机作为玩家而设计的,计算机根据模型的智能来操作,以最大化成功的机会。人类玩家可以做出自己的选择。任何玩家都可以根据自己的选择先玩。计算规则确保计算机选择最佳的槽位,这将导致胜利或阻止对手采取胜利的行动。本文是“基于多磁带图灵机的一字棋博弈赢家决策模型”的推广工作。这项工作的贡献是设计了一种策略来玩井字游戏,计算机永远不会输。
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引用次数: 3
期刊
2017 International Conference on Computer, Communications and Electronics (Comptelix)
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