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Statistical and incremental methods for neural models selection 神经模型选择的统计和增量方法
Pub Date : 2014-02-01 DOI: 10.1504/IJAISC.2014.059287
S. Abid, M. Chtourou, M. Djemel
This work presents two methods of selection of neural models for identification of dynamic systems. Initially, a strategy of selection based on statistical tests, which relates to training and generalisation performances of a neural model is analysed. In the second time, a new constructive approach of neural model selection, which the training begins with minimal structure and then incrementally adds new hidden units and/or layers, is described. The simulation and the application of these methods for selection of neural models are also considered.
本文提出了两种选择用于动态系统辨识的神经模型的方法。首先,分析了一种基于统计检验的选择策略,它关系到神经模型的训练性能和泛化性能。第二次,描述了一种新的构造性神经模型选择方法,即从最小结构开始训练,然后逐渐增加新的隐藏单元和/或层。并对这些方法在神经网络模型选择中的仿真和应用进行了讨论。
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引用次数: 1
A fractile optimisation approach for possibilistic programming problem in fuzzy random environment 模糊随机环境下可能性规划问题的分形优化方法
Pub Date : 2013-09-01 DOI: 10.1504/IJAISC.2013.056829
N. Arbaiy, J. Watada
Real-life applications face simultaneously hybrid uncertainty namely fuzziness and randomness, or ambiguous and vague information that makes the existing decision-making model incapable of handling such uncertainties. This paper presents the possibilistic programming for decision-making using a fractile approach. Some real world problems are formulated as a necessity measure model to deal with the uncertainties, which come from vague aspiration and ambiguous coefficients. Thus, the proposed methodology is important in building the model and finding the solution. The vagueness and ambiguity are properly treated in the paper and the fractile approach is used to solve fuzzy linear programming problem. An illustrative example explains the proposed model. The analytical results of the proposed method reveal the improvement of conventional decision-making approaches to appropriately handle inherent uncertainties contained in the real world situation.
现实应用同时面临着混合不确定性,即模糊性和随机性,或者模糊和模糊的信息,使得现有的决策模型无法处理这种不确定性。本文提出了用分形方法求解决策的可能性规划问题。将一些现实问题表述为处理不确定性的必要度量模型,这些不确定性来自于模糊的期望和模糊的系数。因此,所提出的方法对于构建模型和找到解决方案非常重要。本文对模糊性和模糊性进行了适当的处理,并采用分形方法求解模糊线性规划问题。一个说明性的例子解释了所提出的模型。分析结果表明,该方法改进了传统的决策方法,可以适当地处理现实情况中包含的固有不确定性。
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引用次数: 1
Gesture recognition system using 2D-invariant moment feature and Elman neural network 基于二维不变矩特征和Elman神经网络的手势识别系统
Pub Date : 2013-09-01 DOI: 10.1504/IJAISC.2013.056826
M. Paulraj, C. Hema, S. Yaacob, Mohd Shuhanaz Zanar Azalan, R. Palaniappan
This paper presents a simple sign language recognition system that has been developed using skin colour segmentation and Elman neural network. A simple segmentation process is carried out to separate the right and left hand. The 2D-invariant moments of the right and left hand segmented image are obtained as features. Using the 2D-invariant moment features, an Elman neural network model was developed. The system has been implemented and tested for its validity. Experimental results show that the system has a recognition rate of 90.63%.
本文提出了一种基于肤色分割和Elman神经网络的简单手语识别系统。一个简单的分割过程进行分离的右手和左手。得到左右分割图像的二维不变矩作为特征。利用二维不变矩特征,建立了Elman神经网络模型。该系统已实现并经过测试,验证了其有效性。实验结果表明,该系统的识别率为90.63%。
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引用次数: 0
A chaotic neural network-based encryption algorithm for MPEG-2 encoded video signal 基于混沌神经网络的MPEG-2编码视频信号加密算法
Pub Date : 2013-09-01 DOI: 10.1504/IJAISC.2013.056841
T. A. Fadil, S. Yaakob, R. Badlishah Ahmad, A. Yahya
In this paper, a cipher algorithm based on chaotic neural network CNN is used and integrated inside MPEG-2 video codec system to encrypt and decrypt the quantised coefficients and the motion vector data. This symmetric cipher algorithm was used to transform the plaintext into an unintelligible form under the control of the key. Chaos theory property and its effect on cipher algorithm have been investigated. Result shows that a minor-key modification of the receiver side will lead to unclear video scene with very low PSNR value of -18.363 dB. To reduce the required execution time for CNN cipher algorithm; a motion vector of video signal was selected for encryption and decryption instead of the quantised coefficients. Results indicate little execution time for motion vector encryption and decryption process of 5.498 and 5.381 seconds respectively, but the entropy value decreases to 7.645 as compared to the entropy value of the quantised coefficients encryption. The whole system model can control bit rate and video quality depending on the available bandwidth channel. It can be shown from results that by increasing video quality value the PSNR and the compressed bit rate values will increase also, but with penalty of compression ratio decreasing.
本文将基于混沌神经网络CNN的密码算法集成到MPEG-2视频编解码系统中,对量化系数和运动矢量数据进行加密和解密。该对称密码算法用于在密钥的控制下将明文转换为不可理解的形式。研究了混沌理论的性质及其对密码算法的影响。结果表明,接收机侧的小键修改将导致视频场景不清晰,PSNR值非常低,为-18.363 dB。减少CNN密码算法所需的执行时间;采用视频信号的运动向量代替量化系数进行加密和解密。结果表明,运动矢量加密和解密过程的执行时间较短,分别为5.498秒和5.381秒,但熵值比量化系数加密的熵值降低到7.645秒。整个系统模型可以根据可用带宽信道控制比特率和视频质量。结果表明,随着视频质量值的增加,PSNR和压缩比特率值也会增加,但压缩比的代价会降低。
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引用次数: 5
GPSO versus GA in facial emotion detection GPSO与遗传算法在面部情绪检测中的比较
Pub Date : 2013-09-01 DOI: 10.1504/IJAISC.2013.056828
B. M. Ghandi, R. Nagarajan, S. Yaacob, D. Hazry
We recently proposed the guided particle swarm optimisation GPSO algorithm as a modification to the popular particle swarm optimisation PSO algorithm with the objective of solving the facial emotion recognition problem. A real-time facial emotion recognition software was implemented using GPSO and tested with 25 subjects. The result was found to be good both in terms of recognition success rate and recognition speed. As a follow-up, we decided to investigate how our novel GPSO approach compares with existing popular classification methods, such as genetic algorithm GA. We re-implement our emotion recognition software using GA and tested it using the video recordings of the same 25 subjects that were used to test the GPSO-based system. Our results show that while the recognition success rate achieved using GA is still reasonable, the recognition speed is very slow, suggesting that the GA method may not be suitable for real-time emotion recognition applications.
为了解决人脸情绪识别问题,我们提出了一种基于粒子群算法的导引粒子群优化算法。采用GPSO实现了实时面部情绪识别软件,并对25名受试者进行了测试。结果表明,该方法在识别成功率和识别速度方面都取得了良好的效果。接下来,我们决定研究我们的新GPSO方法与现有流行的分类方法(如遗传算法GA)的比较。我们使用遗传算法重新实现我们的情绪识别软件,并使用用于测试基于gpso的系统的相同25个受试者的视频记录对其进行测试。我们的研究结果表明,虽然使用遗传算法获得的识别成功率仍然合理,但识别速度非常慢,表明遗传算法可能不适合实时情感识别应用。
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引用次数: 1
Classification of interior noise comfort level of Proton model cars using feedforward neural network 基于前馈神经网络的宝腾汽车内部噪声舒适度分类
Pub Date : 2013-09-01 DOI: 10.1504/IJAISC.2013.056838
M. Paulraj, A. M. Andrew
In this research, a Proton model cars noise comfort level classification system has been developed to detect the noise comfort level in cars using artificial neural network. This research focuses on developing a database consisting of car sound samples measured from different Proton make models in stationary and moving state. In the stationary condition, the sound pressure level is measured at 1,300 RPM, 2,000 RPM and 3,000 RPM while in moving condition, the sound is recorded using dB Orchestra while the car is moving at constant speed from 30 km/h up to 110 km/h. Subjective test is conducted to find the jury's evaluation for the specific sound sample. The feature set is then feed to the neural network model to classify the comfort level. The spectral power feature gives the highest classification accuracy of 88.42%.
本研究采用人工神经网络技术,开发了宝腾汽车噪声舒适度分类系统,实现了对汽车噪声舒适度的检测。本研究的重点是建立一个由不同宝腾车型在静止和运动状态下测量的汽车声音样本组成的数据库。在静止状态下,声压级分别测量为1300转/分、2000转/分、3000转/分,在移动状态下,在30公里/小时至110公里/小时的恒定速度下,使用dB Orchestra录制声音。通过主观测试找到陪审团对特定声音样本的评价。然后将特征集馈送到神经网络模型中对舒适度进行分类。光谱功率特征的分类准确率最高,为88.42%。
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引用次数: 0
Particle swarm optimisation and its applications in power converter systems 粒子群优化及其在电力变换器系统中的应用
Pub Date : 2013-09-01 DOI: 10.1504/IJAISC.2013.056848
N. Azli, Norkharziana Mohd Nayan, S. Ayob
Particle swarm optimisation PSO algorithm is known for its easy implementation and has been empirically shown to perform well in many optimisation problems. Thus, it is expected to mitigate the computational burden associated with the solutions of non-linear transcendental equations relevant to problems related to power converter systems. This paper starts with an overview of the general concept of PSO and its variants. It then continues with a review on the application of the PSO algorithm in power converter systems. Then, a sample application is described, focusing on the implementation of the harmonic elimination pulse width modulation HEPWM technique on a single-phase inverter circuit. The results of a simulation and experimental work on the inverter operation have revealed that the PSO method employed is capable of accurately calculating the relevant switching angles and generating the gate signals for the inverter power devices and improving its overall system performance.
粒子群优化算法以其易于实现而闻名,并已在许多优化问题中表现出良好的性能。因此,它有望减轻与电力变换器系统相关问题的非线性超越方程解相关的计算负担。本文首先概述了PSO的一般概念及其变体。接着对粒子群算法在变换器系统中的应用进行了综述。然后,给出了一个实例应用,重点介绍了谐波消除脉宽调制HEPWM技术在单相逆变电路上的实现。对逆变器运行的仿真和实验结果表明,所采用的粒子群算法能够准确地计算出相应的开关角并为逆变器功率器件产生门信号,提高了逆变器的整体系统性能。
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引用次数: 2
Quantitative characterisation of Plasmodium vivax in infected erythrocytes: a textural approach 间日疟原虫感染红细胞的定量表征:一种结构方法
Pub Date : 2013-04-01 DOI: 10.1504/IJAISC.2013.053384
M. Ghosh, D. Das, C. Chakraborty, A. Ray
This paper aims at introducing a textural pattern analysis approach to Plasmodium vivax P. vivax detection from Leishman stained thin blood film. This scheme follows retrospective study design protocol where patients were selected at random in the clinic. The scheme consists of four stages - artefacts reduction, fuzzy divergence-based segmentation of P. vivax infected regions and normal erythrocytes, textural feature extraction using grey level co-occurrence matrix and fractal dimension, finally classification. Here, we have extracted seven features, out of which five are statistically significant in discriminating textures between malaria and normal classes based on light microscopic blood images at 100× resolutions. Finally, Bayesian and support vector machine-based classifiers are trained and validated with 100 cases and 100 control subjects. In effect, it is hereby observed that the significant textural features lead to discriminate P. vivax with 95% and 98% accuracies for SVM and Bayesian classifiers respectively. Results are studied and compared.
本文介绍了一种结构模式分析方法在利什曼染色血膜中检测间日疟原虫。该方案遵循回顾性研究设计方案,在临床随机选择患者。该方案包括四个阶段:伪影还原、基于模糊散度的间日疟原虫感染区域和正常红细胞分割、灰度共生矩阵和分形维数纹理特征提取、最后分类。在这里,我们提取了7个特征,其中5个特征在基于100倍分辨率的光学显微镜血液图像区分疟疾和正常类别纹理方面具有统计意义。最后,对基于贝叶斯和支持向量机的分类器进行了100个案例和100个对照对象的训练和验证。实际上,由此可见,显著的纹理特征导致SVM和贝叶斯分类器区分间日疟原虫的准确率分别为95%和98%。对结果进行了研究和比较。
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引用次数: 13
Automation of combustion monitoring in boilers using discriminant radial basis network 基于判别径向基网络的锅炉燃烧监测自动化
Pub Date : 2013-04-01 DOI: 10.1504/IJAISC.2013.053406
K. Sujatha, N. Pappa, U. Nambi, K. S. Kumar, C. R. R. Dinakaran
This research work aims at monitoring and control of the combustion quality in a power station coal fired boiler using a combination of Fisher's linear discriminant FLD analysis and radial basis network RBN. The flame video is acquired with CCD camera. The features of the flame images like average intensity, area of the flame, brightness of the flame, orientation of the flame, etc. are extracted from the preprocessed images. The FLD is applied to reduce the n-dimensional feature size to two-dimensional feature size for faster learning by the RBN. The results of the proposed technique are compared with the conventional Euclidean distance classifier EDC, which is also used to find the distance between the three groups of images. Three groups of images corresponding to different combustion conditions of the flames have been extracted from a continuous video. The corresponding temperatures and the carbon monoxide CO in the flue gas have been obtained through measurements. Training and testing of Fisher's linear discriminant radial basis network FLDRBN with the data collected have been done and the performances of the various algorithms are evaluated.
本课题旨在将Fisher线性判别FLD分析与径向基网络RBN相结合,对某电站燃煤锅炉的燃烧质量进行监测与控制。火焰视频由CCD摄像机采集。从预处理后的图像中提取火焰图像的平均强度、火焰面积、火焰亮度、火焰方向等特征。FLD用于将n维特征尺寸减小到二维特征尺寸,以提高RBN的学习速度。将该方法的结果与传统的欧几里得距离分类器EDC进行了比较,EDC也用于寻找三组图像之间的距离。从一个连续的视频中提取出三组对应不同燃烧状态的火焰图像。通过测量得到了相应的温度和烟气中的一氧化碳含量。利用收集到的数据对Fisher线性判别径向基网络FLDRBN进行了训练和测试,并对各种算法的性能进行了评价。
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引用次数: 12
SVM-based characterisation of liver cirrhosis by singular value decomposition of GLCM matrix 基于支持向量机的肝硬化GLCM矩阵奇异值分解表征
Pub Date : 2013-04-01 DOI: 10.1504/IJAISC.2013.053407
J. Virmani, Vinod Kumar, N. Kalra, N. Khandelwal
Early diagnosis of liver cirrhosis is essential as cirrhosis is an irreversible disease most often seen as precursor to development of hepatocellular carcinoma. Early diagnosis helps radiologist in better disease management by adequate scheduling of treatment options. In the present work, features derived from GLCM mean matrix, GLCM range matrix and singular value decomposition of GLCM matrix have been used along with SVM classifier for designing an efficient computer-aided diagnostic system to characterise normal and cirrhotic liver. The study has been carried out on 120 regions of interest ROIs extracted from 31 clinically acquired B-mode liver ultrasound images. It is observed that the first four singular values obtained by singular value decomposition of GLCM matrix result in highest accuracy and sensitivity of 98.33% and 100%, respectively. The promising results obtained by the proposed computer-aided diagnostic system indicate its usefulness to assist radiologists in diagnosis of liver cirrhosis.
肝硬化的早期诊断是必要的,因为肝硬化是一种不可逆的疾病,最常被视为发展为肝细胞癌的前兆。早期诊断有助于放射科医生通过适当的治疗方案安排更好的疾病管理。在目前的工作中,从GLCM平均矩阵、GLCM范围矩阵和GLCM矩阵的奇异值分解中得到的特征已经与SVM分类器一起用于设计一个有效的计算机辅助诊断系统来表征正常和肝硬化的肝脏。本研究从31张临床获得的b型肝脏超声图像中提取了120个感兴趣的roi区域。结果表明,对GLCM矩阵进行奇异值分解得到的前四个奇异值,准确率和灵敏度最高,分别为98.33%和100%。所提出的计算机辅助诊断系统所获得的令人满意的结果表明,它有助于放射科医生诊断肝硬化。
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引用次数: 53
期刊
Int. J. Artif. Intell. Soft Comput.
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