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Computational Intelligence and Neuroscience

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https://www.readbyqxmd.com/read/28182121/deep-recurrent-neural-network-based-autoencoders-for-acoustic-novelty-detection
#1
Erik Marchi, Fabio Vesperini, Stefano Squartini, Björn Schuller
In the emerging field of acoustic novelty detection, most research efforts are devoted to probabilistic approaches such as mixture models or state-space models. Only recent studies introduced (pseudo-)generative models for acoustic novelty detection with recurrent neural networks in the form of an autoencoder. In these approaches, auditory spectral features of the next short term frame are predicted from the previous frames by means of Long-Short Term Memory recurrent denoising autoencoders. The reconstruction error between the input and the output of the autoencoder is used as activation signal to detect novel events...
2017: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/28127305/modified-discrete-grey-wolf-optimizer-algorithm-for-multilevel-image-thresholding
#2
Linguo Li, Lijuan Sun, Jian Guo, Jin Qi, Bin Xu, Shujing Li
The computation of image segmentation has become more complicated with the increasing number of thresholds, and the option and application of the thresholds in image thresholding fields have become an NP problem at the same time. The paper puts forward the modified discrete grey wolf optimizer algorithm (MDGWO), which improves on the optimal solution updating mechanism of the search agent by the weights. Taking Kapur's entropy as the optimized function and based on the discreteness of threshold in image segmentation, the paper firstly discretizes the grey wolf optimizer (GWO) and then proposes a new attack strategy by using the weight coefficient to replace the search formula for optimal solution used in the original algorithm...
2017: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/28105044/training-feedforward-neural-networks-using-symbiotic-organisms-search-algorithm
#3
Haizhou Wu, Yongquan Zhou, Qifang Luo, Mohamed Abdel Basset
Symbiotic organisms search (SOS) is a new robust and powerful metaheuristic algorithm, which stimulates the symbiotic interaction strategies adopted by organisms to survive and propagate in the ecosystem. In the supervised learning area, it is a challenging task to present a satisfactory and efficient training algorithm for feedforward neural networks (FNNs). In this paper, SOS is employed as a new method for training FNNs. To investigate the performance of the aforementioned method, eight different datasets selected from the UCI machine learning repository are employed for experiment and the results are compared among seven metaheuristic algorithms...
2016: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/28096809/low-rank-linear-dynamical-systems-for-motor-imagery-eeg
#4
Wenchang Zhang, Fuchun Sun, Chuanqi Tan, Shaobo Liu
The common spatial pattern (CSP) and other spatiospectral feature extraction methods have become the most effective and successful approaches to solve the problem of motor imagery electroencephalography (MI-EEG) pattern recognition from multichannel neural activity in recent years. However, these methods need a lot of preprocessing and postprocessing such as filtering, demean, and spatiospectral feature fusion, which influence the classification accuracy easily. In this paper, we utilize linear dynamical systems (LDSs) for EEG signals feature extraction and classification...
2016: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/28090205/main-trend-extraction-based-on-irregular-sampling-estimation-and-its-application-in-storage-volume-of-internet-data-center
#5
Beibei Miao, Chao Dou, Xuebo Jin
The storage volume of internet data center is one of the classical time series. It is very valuable to predict the storage volume of a data center for the business value. However, the storage volume series from a data center is always "dirty," which contains the noise, missing data, and outliers, so it is necessary to extract the main trend of storage volume series for the future prediction processing. In this paper, we propose an irregular sampling estimation method to extract the main trend of the time series, in which the Kalman filter is used to remove the "dirty" data; then the cubic spline interpolation and average method are used to reconstruct the main trend...
2016: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/28090204/a-tuned-mask-learnt-approach-based-on-gravitational-search-algorithm
#6
Youchuan Wan, Mingwei Wang, Zhiwei Ye, Xudong Lai
Texture image classification is an important topic in many applications in machine vision and image analysis. Texture feature extracted from the original texture image by using "Tuned" mask is one of the simplest and most effective methods. However, hill climbing based training methods could not acquire the satisfying mask at a time; on the other hand, some commonly used evolutionary algorithms like genetic algorithm (GA) and particle swarm optimization (PSO) easily fall into the local optimum. A novel approach for texture image classification exemplified with recognition of residential area is detailed in the paper...
2016: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/28090203/herbal-extracts-that-reduce-ocular-oxidative-stress-may-enhance-attentive-performance-in-humans
#7
RANDOMIZED CONTROLLED TRIAL
Hohyun Cho, Moonyoung Kwon, Hyojung Jang, Jee-Bum Lee, Kyung Chul Yoon, Sung Chan Jun
We used herbal extracts in this study to investigate the effects of blue-light-induced oxidative stress on subjects' attentive performance, which is also associated with work performance. We employed an attention network test (ANT) to measure the subjects' work performance indirectly and used herbal extracts to reduce ocular oxidative stress. Thirty-two subjects participated in either an experimental group (wearing glasses containing herbal extracts) or a control group (wearing glasses without herbal extracts)...
2016: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/28074090/application-of-machine-learning-in-postural-control-kinematics-for-the-diagnosis-of-alzheimer-s-disease
#8
Luís Costa, Miguel F Gago, Darya Yelshyna, Jaime Ferreira, Hélder David Silva, Luís Rocha, Nuno Sousa, Estela Bicho
The use of wearable devices to study gait and postural control is a growing field on neurodegenerative disorders such as Alzheimer's disease (AD). In this paper, we investigate if machine-learning classifiers offer the discriminative power for the diagnosis of AD based on postural control kinematics. We compared Support Vector Machines (SVMs), Multiple Layer Perceptrons (MLPs), Radial Basis Function Neural Networks (RBNs), and Deep Belief Networks (DBNs) on 72 participants (36 AD patients and 36 healthy subjects) exposed to seven increasingly difficult postural tasks...
2016: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/28058046/intelligent-process-abnormal-patterns-recognition-and-diagnosis-based-on-fuzzy-logic
#9
Shi-Wang Hou, Shunxiao Feng, Hui Wang
Locating the assignable causes by use of the abnormal patterns of control chart is a widely used technology for manufacturing quality control. If there are uncertainties about the occurrence degree of abnormal patterns, the diagnosis process is impossible to be carried out. Considering four common abnormal control chart patterns, this paper proposed a characteristic numbers based recognition method point by point to quantify the occurrence degree of abnormal patterns under uncertain conditions and a fuzzy inference system based on fuzzy logic to calculate the contribution degree of assignable causes with fuzzy abnormal patterns...
2016: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/28058045/equivalent-neural-network-optimal-coefficients-using-forgetting-factor-with-sliding-modes
#10
Karen Alicia Aguilar Cruz, José de Jesús Medel Juárez, Romeo Urbieta Parrazales
The Artificial Neural Network (ANN) concept is familiar in methods whose task is, for example, the identification or approximation of the outputs of complex systems difficult to model. In general, the objective is to determine online the adequate parameters to reach a better point-to-point convergence rate, so that this paper presents the parameter estimation for an equivalent ANN (EANN), obtaining a recursive identification for a stochastic system, firstly, with constant parameters and, secondly, with nonstationary output system conditions...
2016: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/28058044/volitional-and-real-time-control-cursor-based-on-eye-movement-decoding-using-a-linear-decoding-model
#11
Jinhua Zhang, Baozeng Wang, Cheng Zhang, Jun Hong
The aim of this study is to build a linear decoding model that reveals the relationship between the movement information and the EOG (electrooculogram) data to online control a cursor continuously with blinks and eye pursuit movements. First of all, a blink detection method is proposed to reject a voluntary single eye blink or double-blink information from EOG. Then, a linear decoding model of time series is developed to predict the position of gaze, and the model parameters are calibrated by the RLS (Recursive Least Square) algorithm; besides, the assessment of decoding accuracy is assessed through cross-validation procedure...
2016: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/28053603/a-novel-accuracy-and-similarity-search-structure-based-on-parallel-bloom-filters
#12
Chunyan Shuai, Hengcheng Yang, Xin Ouyang, Siqi Li, Zheng Chen
In high-dimensional spaces, accuracy and similarity search by low computing and storage costs are always difficult research topics, and there is a balance between efficiency and accuracy. In this paper, we propose a new structure Similar-PBF-PHT to represent items of a set with high dimensions and retrieve accurate and similar items. The Similar-PBF-PHT contains three parts: parallel bloom filters (PBFs), parallel hash tables (PHTs), and a bitmatrix. Experiments show that the Similar-PBF-PHT is effective in membership query and K-nearest neighbors (K-NN) search...
2016: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/28044074/preference-mining-using-neighborhood-rough-set-model-on-two-universes
#13
Kai Zeng
Preference mining plays an important role in e-commerce and video websites for enhancing user satisfaction and loyalty. Some classical methods are not available for the cold-start problem when the user or the item is new. In this paper, we propose a new model, called parametric neighborhood rough set on two universes (NRSTU), to describe the user and item data structures. Furthermore, the neighborhood lower approximation operator is used for defining the preference rules. Then, we provide the means for recommending items to users by using these rules...
2016: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/28044073/stimulator-selection-in-ssvep-based-spatial-selective-attention-study
#14
Songyun Xie, Chang Liu, Klaus Obermayer, Fangshi Zhu, Linan Wang, Xinzhou Xie, Wei Wang
Steady-State Visual Evoked Potentials (SSVEPs) are widely used in spatial selective attention. In this process the two kinds of visual simulators, Light Emitting Diode (LED) and Liquid Crystal Display (LCD), are commonly used to evoke SSVEP. In this paper, the differences of SSVEP caused by these two stimulators in the study of spatial selective attention were investigated. Results indicated that LED could stimulate strong SSVEP component on occipital lobe, and the frequency of evoked SSVEP had high precision and wide range as compared to LCD...
2016: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/28044072/on-the-use-of-self-organizing-map-for-text-clustering-in-engineering-change-process-analysis-a-case-study
#15
Massimo Pacella, Antonio Grieco, Marzia Blaco
In modern industry, the development of complex products involves engineering changes that frequently require redesigning or altering the products or their components. In an engineering change process, engineering change requests (ECRs) are documents (forms) with parts written in natural language describing a suggested enhancement or a problem with a product or a component. ECRs initiate the change process and promote discussions within an organization to help to determine the impact of a change and the best possible solution...
2016: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/28042291/a-self-adaptive-fuzzy-c-means-algorithm-for-determining-the-optimal-number-of-clusters
#16
Min Ren, Peiyu Liu, Zhihao Wang, Jing Yi
For the shortcoming of fuzzy c-means algorithm (FCM) needing to know the number of clusters in advance, this paper proposed a new self-adaptive method to determine the optimal number of clusters. Firstly, a density-based algorithm was put forward. The algorithm, according to the characteristics of the dataset, automatically determined the possible maximum number of clusters instead of using the empirical rule [Formula: see text] and obtained the optimal initial cluster centroids, improving the limitation of FCM that randomly selected cluster centroids lead the convergence result to the local minimum...
2016: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/28042290/automatic-construction-and-global-optimization-of-a-multisentiment-lexicon
#17
Xiaoping Yang, Zhongxia Zhang, Zhongqiu Zhang, Yuting Mo, Lianbei Li, Li Yu, Peican Zhu
Manual annotation of sentiment lexicons costs too much labor and time, and it is also difficult to get accurate quantification of emotional intensity. Besides, the excessive emphasis on one specific field has greatly limited the applicability of domain sentiment lexicons (Wang et al., 2010). This paper implements statistical training for large-scale Chinese corpus through neural network language model and proposes an automatic method of constructing a multidimensional sentiment lexicon based on constraints of coordinate offset...
2016: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/27999590/annealing-ant-colony-optimization-with-mutation-operator-for-solving-tsp
#18
Abdulqader M Mohsen
Ant Colony Optimization (ACO) has been successfully applied to solve a wide range of combinatorial optimization problems such as minimum spanning tree, traveling salesman problem, and quadratic assignment problem. Basic ACO has drawbacks of trapping into local minimum and low convergence rate. Simulated annealing (SA) and mutation operator have the jumping ability and global convergence; and local search has the ability to speed up the convergence. Therefore, this paper proposed a hybrid ACO algorithm integrating the advantages of ACO, SA, mutation operator, and local search procedure to solve the traveling salesman problem...
2016: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/27974884/utilization-of-the-discrete-differential-evolution-for-optimization-in-multidimensional-point-clouds
#19
Vojtěch Uher, Petr Gajdoš, Michal Radecký, Václav Snášel
The Differential Evolution (DE) is a widely used bioinspired optimization algorithm developed by Storn and Price. It is popular for its simplicity and robustness. This algorithm was primarily designed for real-valued problems and continuous functions, but several modified versions optimizing both integer and discrete-valued problems have been developed. The discrete-coded DE has been mostly used for combinatorial problems in a set of enumerative variants. However, the DE has a great potential in the spatial data analysis and pattern recognition...
2016: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/27974883/artificial-neural-network-and-genetic-algorithm-hybrid-intelligence-for-predicting-thai-stock-price-index-trend
#20
Montri Inthachot, Veera Boonjing, Sarun Intakosum
This study investigated the use of Artificial Neural Network (ANN) and Genetic Algorithm (GA) for prediction of Thailand's SET50 index trend. ANN is a widely accepted machine learning method that uses past data to predict future trend, while GA is an algorithm that can find better subsets of input variables for importing into ANN, hence enabling more accurate prediction by its efficient feature selection. The imported data were chosen technical indicators highly regarded by stock analysts, each represented by 4 input variables that were based on past time spans of 4 different lengths: 3-, 5-, 10-, and 15-day spans before the day of prediction...
2016: Computational Intelligence and Neuroscience
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