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2018 5th International Conference on Signal Processing and Integrated Networks (SPIN)最新文献

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Facial Expression Recognition with LDPP & LTP using Deep Belief Network 基于深度信念网络的LDPP和LTP面部表情识别
Vasudha, D. Kakkar
In this paper, local directional position pattern (LDPP) and local ternary pattern (LTP) are selected for facial recognition method which are having many advantages over previous techniques like local binary pattern (LBP) and local directional pattern (LDP). The selected techniques of LDPP and LTP are estrangement in their algorithms which help solely to extract features out of an image. LDPP is a revised form of LDP. In a typical LDP, only the top edge direction was taken into consideration, but strength sign of the pixel was not considered which may result in same code for opposite kind of edge pixel. This snag is overcome by LDPP which is further concatenated with LTP for better feature extraction. Once features are extracted they are trained using deep belief network. In the experimental work 10 images of each expression i.e. angry, surprise, disgust, neutral, sad, smile are selected. LDPP and LTP are concatenated followed by principal component analysis (PCA) and general discriminant analysis (GDA). Further for training, Deep Belief Network (DBN) is used which eventually increases the recognition rate and achieve accuracy of 95.3% which was 89.3% without concatenating.
本文选择了局部定向位置模式(LDPP)和局部三元模式(LTP)作为人脸识别方法,它们比以往的局部二值模式(LBP)和局部定向模式(LDP)有很多优点。LDPP和LTP所选择的技术在它们的算法中是分离的,它们只帮助从图像中提取特征。自民党是自民党的改版。在典型的LDP中,只考虑了上边缘方向,而没有考虑像素的强度符号,这可能导致对相反类型的边缘像素进行相同的编码。LDPP克服了这一障碍,它进一步与LTP相结合,以获得更好的特征提取。一旦特征被提取出来,就会使用深度信念网络进行训练。在实验作品中,我们选择了愤怒、惊讶、厌恶、中性、悲伤、微笑等表情的10张图片。将LDPP和LTP串联起来,然后进行主成分分析(PCA)和一般判别分析(GDA)。进一步的训练,使用深度信念网络(Deep Belief Network, DBN),最终提高了识别率,达到95.3%的准确率,而非拼接的准确率为89.3%。
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引用次数: 9
Tunable Q-Factor Wavelet Transform for Classifying Mechanical Deformations in Power Transformer 可调q因子小波变换在电力变压器机械变形分类中的应用
Sachin Doshi, Malvi Shrimali, S. K. Rajendra, M. Sharma
Mechanical deformations in the power transformer are the result of short circuit forces and improper handling of transformer during transportation. Such deformations grow with the time and might lead to complete breakdown of the transformer. Hence, monitoring the condition of the transformer is essential. This paper presents a technique to analyse the terminal behaviour of the transformer winding. To this end, high frequency circuit model of the transformer winding comprises of inductances, capacitances and resistances is considered initially. Mechanical deformations are then introduced by changing these circuit parameters. Frequency response analysis (FRA) is performed to obtain terminal behavior of the circuit model under both healthy and unhealthy conditions. Signals obtained from FRA are decomposed into five subbands (SBs) using tunable Q-Factor wavelet transform (TQWT). Afterwards, with the help of Shannon Entropy (SE), features of the SBs are extracted. These features are then classified using K-nearest neighbour (KNN) and Ensemble Bagged algorithm (EB). The statistical parameters like p-value and t-test clearly indicated that the signals are classified in to healthy and faulty states. Further, data have been classified properly with an accuracy of 99.2%.
电力变压器的机械变形是由于短路力和运输过程中处理不当造成的。这种变形随着时间的推移而增加,并可能导致变压器完全故障。因此,监测变压器的状态是必不可少的。本文提出了一种分析变压器绕组终端行为的方法。为此,首先考虑了由电感、电容和电阻组成的变压器绕组高频电路模型。然后通过改变这些电路参数引入机械变形。通过频响分析(FRA)获得了电路模型在健康和非健康状态下的终端行为。利用可调q因子小波变换(TQWT)将FRA信号分解为5个子带(SBs)。然后,利用香农熵(Shannon Entropy, SE)提取出SBs的特征。然后使用k近邻(KNN)和集成Bagged算法(EB)对这些特征进行分类。p值和t检验等统计参数清楚地表明信号分为健康状态和故障状态。此外,数据被正确分类,准确率达到99.2%。
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引用次数: 1
Enhancement of Underwater images using White Balancing and Rayleigh-Stretching 利用白平衡和瑞利拉伸增强水下图像
Monika Mathur, Nidhi Goel
Absorption and scattering are the two main issues in underwater image capturing which results in diminished contrast, high level of blurring and faded colours. The present paper proposes a method of enhancing underwater images for better visual quality using auto white balancing followed by gamma correction and Rayleigh stretching in RGB colour model. The proposed method is very effective which does not require any dedicated hardware and depends only on single image. The use of white balancing compensates the non-uniform color cast which is caused by the selective absorption of colors with depth. Histogram stretching of red colour channel is done with a minimum limit of 5% and histogram stretching of blue channel is done with a maximum limit of 95%. Histogram of green channel is stretched in both the directions. To compensate the effect of under and over enhancement from the image, histograms of the stretched colour channels are mapped to trail a Rayleigh distribution. Thorough analysis has been carried out to verify the proposed method. Contrast and image details are effectively enhanced by minimizing the bluish-green effect and reducing less as well as more enhanced areas from resultant image.
吸收和散射是水下图像捕获的两个主要问题,导致对比度降低,高度模糊和褪色的颜色。本文提出了一种在RGB色彩模型中使用自动白平衡、伽玛校正和瑞利拉伸来增强水下图像以获得更好的视觉质量的方法。该方法不需要任何专用硬件,只依赖于单个图像,非常有效。白平衡的使用补偿了由于深度选择性吸收颜色而引起的不均匀色偏。红色通道的直方图拉伸的最小限制为5%,蓝色通道的直方图拉伸的最大限制为95%。绿色通道的直方图在两个方向上都被拉伸。为了补偿图像增强不足和增强过度的影响,拉伸颜色通道的直方图被映射到瑞利分布。为了验证所提出的方法,进行了深入的分析。对比度和图像细节的有效增强,通过最小化蓝绿色的影响和减少较少以及更多的增强区域从最终的图像。
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引用次数: 11
Speech De-noising using Wavelet based Methods with Focus on Classification of Speech into Voiced, Unvoiced and Silence Regions 基于小波的语音降噪方法,重点研究语音的浊音区、浊音区和静音区
Anamika Baishya, Priyatam Kumar
This paper presents an improved speech enhancement technique based on wavelet transform along with excitation-based classification of speech to eliminate noise from speech signals. The method initially classifies the speech into voiced, unvoiced and silence regions on the basis of a novel energy-based threshold and then wavelet transform is applied. To remove the noise, thresholding is applied to the detail coefficients by taking into consideration different characteristics of speech in the three different regions. For this, soft thresholding is used for the voiced regions, hard thresholding for the unvoiced regions and the wavelet coefficients of silence regions are made zero. Speech signals obtained from SPEAR database and corrupted with white noise are being used for evaluation of the proposed method. Experimental results show, in terms of SNR and PESQ score, de-noising of speech is achieved using the proposed method. With regards to SNR, the best improvement is 9.4 dB when compared to the SNR of the original (noisy) speech and 1.2 dB as compared to the improvement obtained using one of the recently reported methods.
本文提出了一种基于小波变换和基于激励的语音分类的语音增强技术,以消除语音信号中的噪声。该方法首先基于一种新的基于能量的阈值将语音划分为浊音、浊音和静音区域,然后应用小波变换。为了去除噪声,考虑到三个不同区域语音的不同特征,对细节系数进行阈值处理。为此,对浊音区域采用软阈值法,对浊音区域采用硬阈值法,并使静音区域的小波系数为零。利用SPEAR数据库中被白噪声破坏的语音信号对该方法进行了评价。实验结果表明,从信噪比和PESQ分数两方面来看,该方法均能实现语音去噪。在信噪比方面,与原始(有噪声)语音的信噪比相比,最佳的改进是9.4 dB,与使用最近报道的方法之一相比,最佳的改进是1.2 dB。
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引用次数: 4
Error Rate Performance of SC-FDMA with Channel Dependent Subcarrier Scheduling 信道相关子载波调度的SC-FDMA错误率性能研究
V. Trivedi, Madhusudan Kumar Sinha, Preetam Kumar
Single Carrier Frequency Division Multiple Access (SC-FDMA) is a promising technique compared to Orthogonal Frequency Division Multiple Access (OFDMA) for uplink transmission in 3rd Generation Partnership Project(3GPP) Long Term Evolution(LTE) because of its low peak to average power ratio (PAPR). Being a multiple access technique, resources are required to be distributed among various users. In this paper, we have used Zero Forcing noise amplification factor (βZF) for scheduling subcarrier allocation in SC-FDMA systems unlike using the summation of amplitude response over different subcarriers. Using βZF for scheduling gives more exact information about channel condition over different sub bands for different users. For scheduling purpose we have used, Round Robin, Greedy Chunk and Proportionally Fair algorithms and we have compared the SER results for the different number of users including maximum possible users transmitting simultaneously. The effect on capacity and throughput over error performance has been observed earlier. In this work, the effects of different channel-dependent scheduling schemes on error rate performance of SC-FDMA have been evaluated.
与正交频分多址(OFDMA)相比,单载波频分多址(SC-FDMA)由于其较低的峰值平均功率比(PAPR)而成为第三代合作伙伴计划(3GPP)长期演进(LTE)中较有前途的上行传输技术。作为一种多址技术,需要将资源分配给不同的用户。在本文中,我们使用零强迫噪声放大因子(βZF)来调度SC-FDMA系统中的子载波分配,而不是使用不同子载波的振幅响应求和。利用βZF进行调度,可以更准确地了解不同用户在不同子频段上的信道状况。为了调度目的,我们使用了轮询、贪婪块和比例公平算法,并比较了不同用户数量的SER结果,包括同时传输的最大可能用户。容量和吞吐量对错误性能的影响在前面已经观察到。本文研究了不同信道相关调度方案对SC-FDMA误码率性能的影响。
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引用次数: 5
Classification and Detection of Epilepsy using Reduced Set of Extracted Features 基于特征提取约简集的癫痫分类与检测
Hemant Choubey, Alpana Pandey
The Electroencephalogram (EEG) signal is the non-invasive technique to examine the electrical activity of the brain and epilepsy is the chronological disorder or abnormality symptoms obtained from EEG data. The detection of this abnormality requires large number of features for the classification of healthy, inter-ictal and ictal signal from the EEG signal. Epileptic seizure detection using reduced set of features is the main idea behind in this paper. Expected Activity Measurement coefficient and Hurst Exponent with Higuchi Fractal Dimension is the small set of features sufficient for the detection of epileptic seizure from EEG signal using k-NN classifier with performance parameter like Accuracy, Precision and Jaccard Coefficient.
脑电图(EEG)信号是一种检查大脑电活动的非侵入性技术,癫痫是从脑电图数据中获得的时间紊乱或异常症状。这种异常的检测需要大量的特征来从脑电图信号中对健康信号、间隔信号和间隔信号进行分类。本文的主要思想是利用约简特征集进行癫痫发作检测。期望活动测量系数和具有Higuchi分形维数的Hurst指数是使用具有Accuracy、Precision和Jaccard系数等性能参数的k-NN分类器从脑电图信号中检测癫痫发作的小特征集。
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引用次数: 4
A Two-element Wideband MIMO Antenna For X-Band, Ku-Band, K-band Applications 用于x波段,ku波段,k波段应用的双元宽带MIMO天线
Nirdosh, Shalini Sah, Ashna Kakkar
A two-element wideband MIMO antenna is presented in this letter. This wideband MIMO is composed of two inverted E-shaped monopole elements having symmetrically configuration, and uses of dumbbell shaped slot structure between central positions of two elements to achieve low mutual coupling. It has covered wide frequency bandwidth from 8.47 GHz to 26.76 GHz with higher isolation (more than 22 dB). The overall dimension of this antenna is 35mm × 40mm × 1.6mm. This simulated antenna is realized on FR4 substrate with relative permittivity of 4.4.The ECC (envelope correlation coefficient) and diversity gain are also studied and calculated which provide satisfactory results over the entire operating band for the application of X-band, Ku-band and K-band.
本文介绍了一种双元宽带MIMO天线。该宽带MIMO由两个对称配置的倒e型单极元组成,并在两个元的中心位置之间采用哑铃形槽结构实现低互耦合。它覆盖了8.47 GHz至26.76 GHz的宽频率带宽,具有更高的隔离度(超过22 dB)。该天线的外形尺寸为35mm × 40mm × 1.6mm。仿真天线是在相对介电常数为4.4的FR4衬底上实现的。对包络相关系数(ECC)和分集增益进行了研究和计算,对x波段、ku波段和k波段的应用在整个工作频带内提供了满意的结果。
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引用次数: 7
Cognitive decision engine design for CR based IoTs using Differential Evolution and Bat Algorithm 基于差分进化和Bat算法的物联网认知决策引擎设计
Avneet Kaur, Ashmeet Kaur, Surbhi Sharma
Current research efforts in communication technology are shifting towards new paradigm namely, Internet of Things (IoTs). There is a strong need to tackle the challenge of introduction of massive data into network by IoT supported applications. For this, Cognitive Radio networks (CRNs) are seen as a potential solution. Enabling IoT objects with Cognitive radio features has led to new research dimension of CR based IoTs. Real time tuning of transmission parameters by Cognitive decision engine as per user needs and dynamic environment conditions is one of the important tasks. Determination of optimal value of transmission parameters becomes even more challenging for a multicarrier system because of high dimensionality as there are large number of decision variables to be optimized. Nature inspired metaheuristic optimization techniques offer an efficient and simple solution to the aforementioned problem. In this paper, comparative performance analysis of Differential evolution (DE) and Bat algorithm has been done for the parameter tuning problem. The results demonstrate that the parameter adaptation by DE based engine outperforms the Bat based implementation in terms of fitness score for the five different transmission modes supported by CR based IoTs.
目前通信技术的研究工作正在转向新的范式,即物联网(iot)。通过物联网支持的应用程序,我们迫切需要解决将大量数据引入网络的挑战。为此,认知无线电网络(crn)被视为一种潜在的解决方案。使物联网对象具有认知无线电特征,为基于CR的物联网提供了新的研究维度。认知决策引擎根据用户需求和动态环境条件实时调整传输参数是其中的重要任务之一。由于多载波系统具有高维数,需要优化的决策变量众多,使得传输参数的最优值的确定更加具有挑战性。自然启发的元启发式优化技术为上述问题提供了一种有效而简单的解决方案。本文对差分进化算法(DE)和Bat算法在参数调优问题上的性能进行了比较分析。结果表明,对于基于CR的物联网支持的五种不同传输模式,基于DE的引擎的参数自适应在适应度评分方面优于基于Bat的实现。
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引用次数: 2
A Variable Length Genetic Algorithm approach to Optimize Data Collection using Mobile Sink in Wireless Sensor Networks 基于变长遗传算法的无线传感器网络移动汇聚数据采集优化
Raj Anwit
Data collection using mobile sink (MS) in wireless sensor network (WSN) is an efficient approach to collect data from sensor nodes (SNs). There are several advantages of using a MS like, it helps to alleviate the sink hole problem, balances energy consumption of the network, enhances network lifetime etc. The MS has to go through the WSN and collect data from SNs by stopping at some predefined locations from where SNs are in its vicinity. Finding the number of such locations is a fundamental problem in the path design of a MS. In this paper, we present a novel variable length gentic algorithm (VLGA) to find a solution to the problem. The algorithm finds the optimal number and location of sojourn points which are used to design the tour of the MS. The algorithm is simulated extensively and compared with the TSP algorithm. The results obtained shows better performance of VLGA over TSP algorithm in terms of path length and data collection time of the MS.
在无线传感器网络(WSN)中,利用移动接收器(MS)采集数据是一种有效的从传感器节点(SNs)采集数据的方法。使用MS有几个优点,例如,它有助于缓解sink hole问题,平衡网络的能量消耗,提高网络寿命等。MS必须通过WSN,并在SNs附近的一些预定义位置停下来,从SNs收集数据。在本篇论文中,我们提出了一种新的变长遗传算法(VLGA)来解决这个问题。该算法寻找逗留点的最优数量和位置,用于设计ms的行程,并与TSP算法进行了广泛的仿真比较。结果表明,VLGA算法在MS的路径长度和数据采集时间方面优于TSP算法。
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引用次数: 7
Design of 64 QAM Transceiver Model and its Performance Analysis for FSO Communication FSO通信中64 QAM收发器模型设计及性能分析
S. Sarkar, V. Janyani, G. Singh, Tawfik Ismail, H. Selmy
In this paper we have proposed a transceiver model which utilizes 64 QAM type of modulation scheme for free space optical communication, the unique feature of our proposed model is that it transmits very low optical power into FSO channel utilizing 64 QAM modulation scheme. The model performance was observed for various data rates up to 120Gbps and for a LOS range of 1.2 Km. The model was implemented on Optiwave – Optisystem software over a Free Space Optical communication channel.
本文提出了一种利用64 QAM调制方案的自由空间光通信收发器模型,该模型的独特之处在于它利用64 QAM调制方案向FSO信道传输极低的光功率。在高达120Gbps的各种数据速率和1.2 Km的LOS范围下观察了该模型的性能。该模型在Optiwave - Optisystem软件上通过自由空间光通信信道实现。
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引用次数: 3
期刊
2018 5th International Conference on Signal Processing and Integrated Networks (SPIN)
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