Computational Intelligence and Neuroscience http://www.hindawi.com The latest articles from Hindawi Publishing Corporation © 2016 , Hindawi Publishing Corporation . All rights reserved. Multiobjective Image Color Quantization Algorithm Based on Self-Adaptive Hybrid Differential Evolution Sun, 25 Sep 2016 13:09:01 +0000 http://www.hindawi.com/journals/cin/2016/2450431/ In recent years, some researchers considered image color quantization as a single-objective problem and applied heuristic algorithms to solve it. This paper establishes a multiobjective image color quantization model with intracluster distance and intercluster separation as its objectives. Inspired by a multipopulation idea, a multiobjective image color quantization algorithm based on self-adaptive hybrid differential evolution (MoDE-CIQ) is then proposed to solve this model. Two numerical experiments on four common test images are conducted to analyze the effectiveness and competitiveness of the multiobjective model and the proposed algorithm. Zhongbo Hu, Qinghua Su, and Xuewen Xia Copyright © 2016 Zhongbo Hu et al. All rights reserved. Segmentation of Coronary Angiograms Using Gabor Filters and Boltzmann Univariate Marginal Distribution Algorithm Sun, 25 Sep 2016 08:38:05 +0000 http://www.hindawi.com/journals/cin/2016/2420962/ This paper presents a novel method for improving the training step of the single-scale Gabor filters by using the Boltzmann univariate marginal distribution algorithm (BUMDA) in X-ray angiograms. Since the single-scale Gabor filters (SSG) are governed by three parameters, the optimal selection of the SSG parameters is highly desirable in order to maximize the detection performance of coronary arteries while reducing the computational time. To obtain the best set of parameters for the SSG, the area () under the receiver operating characteristic curve is used as fitness function. Moreover, to classify vessel and nonvessel pixels from the Gabor filter response, the interclass variance thresholding method has been adopted. The experimental results using the proposed method obtained the highest detection rate with over a training set of 40 images and with a test set of 40 images. In addition, the experimental results of vessel segmentation provided an accuracy of with the test set of angiograms. Fernando Cervantes-Sanchez, Ivan Cruz-Aceves, Arturo Hernandez-Aguirre, Juan Gabriel Aviña-Cervantes, Sergio Solorio-Meza, Manuel Ornelas-Rodriguez, and Miguel Torres-Cisneros Copyright © 2016 Fernando Cervantes-Sanchez et al. All rights reserved. A Novel Method of Failure Sample Selection for Electrical Systems Using Ant Colony Optimization Thu, 22 Sep 2016 12:37:12 +0000 http://www.hindawi.com/journals/cin/2016/4238734/ The influence of failure propagation is ignored in failure sample selection based on traditional testability demonstration experiment method. Traditional failure sample selection generally causes the omission of some failures during the selection and this phenomenon could lead to some fearful risks of usage because these failures will lead to serious propagation failures. This paper proposes a new failure sample selection method to solve the problem. First, the method uses a directed graph and ant colony optimization (ACO) to obtain a subsequent failure propagation set (SFPS) based on failure propagation model and then we propose a new failure sample selection method on the basis of the number of SFPS. Compared with traditional sampling plan, this method is able to improve the coverage of testing failure samples, increase the capacity of diagnosis, and decrease the risk of using. Jian Xiong, Shulin Tian, Chenglin Yang, and Cheng Liu Copyright © 2016 Jian Xiong et al. All rights reserved. Hybrid Artificial Root Foraging Optimizer Based Multilevel Threshold for Image Segmentation Tue, 20 Sep 2016 16:35:21 +0000 http://www.hindawi.com/journals/cin/2016/1476838/ This paper proposes a new plant-inspired optimization algorithm for multilevel threshold image segmentation, namely, hybrid artificial root foraging optimizer (HARFO), which essentially mimics the iterative root foraging behaviors. In this algorithm the new growth operators of branching, regrowing, and shrinkage are initially designed to optimize continuous space search by combining root-to-root communication and coevolution mechanism. With the auxin-regulated scheme, various root growth operators are guided systematically. With root-to-root communication, individuals exchange information in different efficient topologies, which essentially improve the exploration ability. With coevolution mechanism, the hierarchical spatial population driven by evolutionary pressure of multiple subpopulations is structured, which ensure that the diversity of root population is well maintained. The comparative results on a suit of benchmarks show the superiority of the proposed algorithm. Finally, the proposed HARFO algorithm is applied to handle the complex image segmentation problem based on multilevel threshold. Computational results of this approach on a set of tested images show the outperformance of the proposed algorithm in terms of optimization accuracy computation efficiency. Yang Liu, Junfei Liu, Liwei Tian, and Lianbo Ma Copyright © 2016 Yang Liu et al. All rights reserved. Analysis of Different Classification Techniques for Two-Class Functional Near-Infrared Spectroscopy-Based Brain-Computer Interface Tue, 20 Sep 2016 08:44:00 +0000 http://www.hindawi.com/journals/cin/2016/5480760/ We analyse and compare the classification accuracies of six different classifiers for a two-class mental task (mental arithmetic and rest) using functional near-infrared spectroscopy (fNIRS) signals. The signals of the mental arithmetic and rest tasks from the prefrontal cortex region of the brain for seven healthy subjects were acquired using a multichannel continuous-wave imaging system. After removal of the physiological noises, six features were extracted from the oxygenated hemoglobin (HbO) signals. Two- and three-dimensional combinations of those features were used for classification of mental tasks. In the classification, six different modalities, linear discriminant analysis (LDA), quadratic discriminant analysis (QDA), -nearest neighbour (NN), the Naïve Bayes approach, support vector machine (SVM), and artificial neural networks (ANN), were utilized. With these classifiers, the average classification accuracies among the seven subjects for the 2- and 3-dimensional combinations of features were 71.6, 90.0, 69.7, 89.8, 89.5, and 91.4% and 79.6, 95.2, 64.5, 94.8, 95.2, and 96.3%, respectively. ANN showed the maximum classification accuracies: 91.4 and 96.3%. In order to validate the results, a statistical significance test was performed, which confirmed that the p values were statistically significant relative to all of the other classifiers (p < 0.005) using HbO signals. Noman Naseer, Nauman Khalid Qureshi, Farzan Majeed Noori, and Keum-Shik Hong Copyright © 2016 Noman Naseer et al. All rights reserved. A Linear Analysis of Coupled Wilson-Cowan Neuronal Populations Tue, 20 Sep 2016 08:05:22 +0000 http://www.hindawi.com/journals/cin/2016/8939218/ Let a neuronal population be composed of an excitatory group interconnected to an inhibitory group. In the Wilson-Cowan model, the activity of each group of neurons is described by a first-order nonlinear differential equation. The source of the nonlinearity is the interaction between these two groups, which is represented by a sigmoidal function. Such a nonlinearity makes difficult theoretical works. Here, we analytically investigate the dynamics of a pair of coupled populations described by the Wilson-Cowan model by using a linear approximation. The analytical results are compared to numerical simulations, which show that the trajectories of this fourth-order dynamical system can converge to an equilibrium point, a limit cycle, a two-dimensional torus, or a chaotic attractor. The relevance of this study is discussed from a biological perspective. L. L. Neves and L. H. A. Monteiro Copyright © 2016 L. L. Neves and L. H. A. Monteiro. All rights reserved. Designs and Algorithms to Map Eye Tracking Data with Dynamic Multielement Moving Objects Tue, 20 Sep 2016 08:04:37 +0000 http://www.hindawi.com/journals/cin/2016/9354760/ Design concepts and algorithms were developed to address the eye tracking analysis issues that arise when (1) participants interrogate dynamic multielement objects that can overlap on the display and (2) visual angle error of the eye trackers is incapable of providing exact eye fixation coordinates. These issues were addressed by (1) developing dynamic areas of interests (AOIs) in the form of either convex or rectangular shapes to represent the moving and shape-changing multielement objects, (2) introducing the concept of AOI gap tolerance (AGT) that controls the size of the AOIs to address the overlapping and visual angle error issues, and (3) finding a near optimal AGT value. The approach was tested in the context of air traffic control (ATC) operations where air traffic controller specialists (ATCSs) interrogated multiple moving aircraft on a radar display to detect and control the aircraft for the purpose of maintaining safe and expeditious air transportation. In addition, we show how eye tracking analysis results can differ based on how we define dynamic AOIs to determine eye fixations on moving objects. The results serve as a framework to more accurately analyze eye tracking data and to better support the analysis of human performance. Ziho Kang, Saptarshi Mandal, Jerry Crutchfield, Angel Millan, and Sarah N. McClung Copyright © 2016 Ziho Kang et al. All rights reserved. Ensemble Deep Learning for Biomedical Time Series Classification Tue, 20 Sep 2016 08:04:03 +0000 http://www.hindawi.com/journals/cin/2016/6212684/ Ensemble learning has been proved to improve the generalization ability effectively in both theory and practice. In this paper, we briefly outline the current status of research on it first. Then, a new deep neural network-based ensemble method that integrates filtering views, local views, distorted views, explicit training, implicit training, subview prediction, and Simple Average is proposed for biomedical time series classification. Finally, we validate its effectiveness on the Chinese Cardiovascular Disease Database containing a large number of electrocardiogram recordings. The experimental results show that the proposed method has certain advantages compared to some well-known ensemble methods, such as Bagging and AdaBoost. Lin-peng Jin and Jun Dong Copyright © 2016 Lin-peng Jin and Jun Dong. All rights reserved. Fault Diagnosis for Analog Circuits by Using EEMD, Relative Entropy, and ELM Thu, 08 Sep 2016 18:05:42 +0000 http://www.hindawi.com/journals/cin/2016/7657054/ This paper presents a novel fault diagnosis method for analog circuits using ensemble empirical mode decomposition (EEMD), relative entropy, and extreme learning machine (ELM). First, nominal and faulty response waveforms of a circuit are measured, respectively, and then are decomposed into intrinsic mode functions (IMFs) with the EEMD method. Second, through comparing the nominal IMFs with the faulty IMFs, kurtosis and relative entropy are calculated for each IMF. Next, a feature vector is obtained for each faulty circuit. Finally, an ELM classifier is trained with these feature vectors for fault diagnosis. Via validating with two benchmark circuits, results show that the proposed method is applicable for analog fault diagnosis with acceptable levels of accuracy and time cost. Jian Xiong, Shulin Tian, and Chenglin Yang Copyright © 2016 Jian Xiong et al. All rights reserved. A Novel Hybrid Clonal Selection Algorithm with Combinatorial Recombination and Modified Hypermutation Operators for Global Optimization Thu, 08 Sep 2016 12:21:28 +0000 http://www.hindawi.com/journals/cin/2016/6204728/ Artificial immune system is one of the most recently introduced intelligence methods which was inspired by biological immune system. Most immune system inspired algorithms are based on the clonal selection principle, known as clonal selection algorithms (CSAs). When coping with complex optimization problems with the characteristics of multimodality, high dimension, rotation, and composition, the traditional CSAs often suffer from the premature convergence and unsatisfied accuracy. To address these concerning issues, a recombination operator inspired by the biological combinatorial recombination is proposed at first. The recombination operator could generate the promising candidate solution to enhance search ability of the CSA by fusing the information from random chosen parents. Furthermore, a modified hypermutation operator is introduced to construct more promising and efficient candidate solutions. A set of 16 common used benchmark functions are adopted to test the effectiveness and efficiency of the recombination and hypermutation operators. The comparisons with classic CSA, CSA with recombination operator (RCSA), and CSA with recombination and modified hypermutation operator (RHCSA) demonstrate that the proposed algorithm significantly improves the performance of classic CSA. Moreover, comparison with the state-of-the-art algorithms shows that the proposed algorithm is quite competitive. Weiwei Zhang, Jingjing Lin, Honglei Jing, and Qiuwen Zhang Copyright © 2016 Weiwei Zhang et al. All rights reserved. An Incremental Radial Basis Function Network Based on Information Granules and Its Application Thu, 08 Sep 2016 12:05:14 +0000 http://www.hindawi.com/journals/cin/2016/3207627/ This paper is concerned with the design of an Incremental Radial Basis Function Network (IRBFN) by combining Linear Regression (LR) and local RBFN for the prediction of heating load and cooling load in residential buildings. Here the proposed IRBFN is designed by building a collection of information granules through Context-based Fuzzy C-Means (CFCM) clustering algorithm that is guided by the distribution of error of the linear part of the LR model. After adopting a construct of a LR as global model, refine it through local RBFN that captures remaining and more localized nonlinearities of the system to be considered. The experiments are performed on the estimation of energy performance of 768 diverse residential buildings. The experimental results revealed that the proposed IRBFN showed good performance in comparison to LR, the standard RBFN, RBFN with information granules, and Linguistic Model (LM). Myung-Won Lee and Keun-Chang Kwak Copyright © 2016 Myung-Won Lee and Keun-Chang Kwak. All rights reserved. Fracture Mechanics Method for Word Embedding Generation of Neural Probabilistic Linguistic Model Tue, 06 Sep 2016 17:14:22 +0000 http://www.hindawi.com/journals/cin/2016/3506261/ Word embedding, a lexical vector representation generated via the neural linguistic model (NLM), is empirically demonstrated to be appropriate for improvement of the performance of traditional language model. However, the supreme dimensionality that is inherent in NLM contributes to the problems of hyperparameters and long-time training in modeling. Here, we propose a force-directed method to improve such problems for simplifying the generation of word embedding. In this framework, each word is assumed as a point in the real world; thus it can approximately simulate the physical movement following certain mechanics. To simulate the variation of meaning in phrases, we use the fracture mechanics to do the formation and breakdown of meaning combined by a 2-gram word group. With the experiments on the natural linguistic tasks of part-of-speech tagging, named entity recognition and semantic role labeling, the result demonstrated that the 2-dimensional word embedding can rival the word embeddings generated by classic NLMs, in terms of accuracy, recall, and text visualization. Size Bi, Xiao Liang, and Ting-lei Huang Copyright © 2016 Size Bi et al. All rights reserved. A Forecasting Model for Feed Grain Demand Based on Combined Dynamic Model Tue, 06 Sep 2016 11:55:03 +0000 http://www.hindawi.com/journals/cin/2016/5329870/ In order to improve the long-term prediction accuracy of feed grain demand, a dynamic forecast model of long-term feed grain demand is realized with joint multivariate regression model, of which the correlation between the feed grain demand and its influence factors is analyzed firstly; then the change trend of various factors that affect the feed grain demand is predicted by using ARIMA model. The simulation results show that the accuracy of proposed combined dynamic forecasting model is obviously higher than that of the grey system model. Thus, it indicates that the proposed algorithm is effective. Tiejun Yang, Na Yang, and Chunhua Zhu Copyright © 2016 Tiejun Yang et al. All rights reserved. The Brainarium: An Interactive Immersive Tool for Brain Education, Art, and Neurotherapy Tue, 06 Sep 2016 06:37:22 +0000 http://www.hindawi.com/journals/cin/2016/4204385/ Recent theoretical and technological advances in neuroimaging techniques now allow brain electrical activity to be recorded using affordable and user-friendly equipment for nonscientist end-users. An increasing number of educators and artists have begun using electroencephalogram (EEG) to control multimedia and live artistic contents. In this paper, we introduce a new concept based on brain computer interface (BCI) technologies: the Brainarium. The Brainarium is a new pedagogical and artistic tool, which can deliver and illustrate scientific knowledge, as well as a new framework for scientific exploration. The Brainarium consists of a portable planetarium device that is being used as brain metaphor. This is done by projecting multimedia content on the planetarium dome and displaying EEG data recorded from a subject in real time using Brain Machine Interface (BMI) technologies. The system has been demonstrated through several performances involving an interaction between the subject controlling the BMI, a musician, and the audience during series of exhibitions and workshops in schools. We report here feedback from 134 participants who filled questionnaires to rate their experiences. Our results show improved subjective learning compared to conventional methods, improved entertainment value, improved absorption into the material being presented, and little discomfort. Romain Grandchamp and Arnaud Delorme Copyright © 2016 Romain Grandchamp and Arnaud Delorme. All rights reserved. Fuzzy Logic Based Control for Autonomous Mobile Robot Navigation Mon, 05 Sep 2016 14:04:17 +0000 http://www.hindawi.com/journals/cin/2016/9548482/ This paper describes the design and the implementation of a trajectory tracking controller using fuzzy logic for mobile robot to navigate in indoor environments. Most of the previous works used two independent controllers for navigation and avoiding obstacles. The main contribution of the paper can be summarized in the fact that we use only one fuzzy controller for navigation and obstacle avoidance. The used mobile robot is equipped with DC motor, nine infrared range (IR) sensors to measure the distance to obstacles, and two optical encoders to provide the actual position and speeds. To evaluate the performances of the intelligent navigation algorithms, different trajectories are used and simulated using MATLAB software and SIMIAM navigation platform. Simulation results show the performances of the intelligent navigation algorithms in terms of simulation times and travelled path. Hajer Omrane, Mohamed Slim Masmoudi, and Mohamed Masmoudi Copyright © 2016 Hajer Omrane et al. All rights reserved. Discovering Patterns in Brain Signals Using Decision Trees Mon, 05 Sep 2016 13:23:34 +0000 http://www.hindawi.com/journals/cin/2016/6391807/ Even with emerging technologies, such as Brain-Computer Interfaces (BCI) systems, understanding how our brains work is a very difficult challenge. So we propose to use a data mining technique to help us in this task. As a case of study, we analyzed the brain’s behaviour of blind people and sighted people in a spatial activity. There is a common belief that blind people compensate their lack of vision using the other senses. If an object is given to sighted people and we asked them to identify this object, probably the sense of vision will be the most determinant one. If the same experiment was repeated with blind people, they will have to use other senses to identify the object. In this work, we propose a methodology that uses decision trees (DT) to investigate the difference of how the brains of blind people and people with vision react against a spatial problem. We choose the DT algorithm because it can discover patterns in the brain signal, and its presentation is human interpretable. Our results show that using DT to analyze brain signals can help us to understand the brain’s behaviour. Narusci S. Bastos, Diana F. Adamatti, and Cleo Z. Billa Copyright © 2016 Narusci S. Bastos et al. All rights reserved. A Modified MinMax -Means Algorithm Based on PSO Tue, 30 Aug 2016 09:10:00 +0000 http://www.hindawi.com/journals/cin/2016/4606384/ The MinMax -means algorithm is widely used to tackle the effect of bad initialization by minimizing the maximum intraclustering errors. Two parameters, including the exponent parameter and memory parameter, are involved in the executive process. Since different parameters have different clustering errors, it is crucial to choose appropriate parameters. In the original algorithm, a practical framework is given. Such framework extends the MinMax -means to automatically adapt the exponent parameter to the data set. It has been believed that if the maximum exponent parameter has been set, then the programme can reach the lowest intraclustering errors. However, our experiments show that this is not always correct. In this paper, we modified the MinMax -means algorithm by PSO to determine the proper values of parameters which can subject the algorithm to attain the lowest clustering errors. The proposed clustering method is tested on some favorite data sets in several different initial situations and is compared to the -means algorithm and the original MinMax -means algorithm. The experimental results indicate that our proposed algorithm can reach the lowest clustering errors automatically. Xiaoyan Wang and Yanping Bai Copyright © 2016 Xiaoyan Wang and Yanping Bai. All rights reserved. ELM Meets Urban Big Data Analysis: Case Studies Mon, 29 Aug 2016 17:40:38 +0000 http://www.hindawi.com/journals/cin/2016/4970246/ In the latest years, the rapid progress of urban computing has engendered big issues, which creates both opportunities and challenges. The heterogeneous and big volume of data and the big difference between physical and virtual worlds have resulted in lots of problems in quickly solving practical problems in urban computing. In this paper, we propose a general application framework of ELM for urban computing. We present several real case studies of the framework like smog-related health hazard prediction and optimal retain store placement. Experiments involving urban data in China show the efficiency, accuracy, and flexibility of our proposed framework. Ningyu Zhang, Huajun Chen, Xi Chen, and Jiaoyan Chen Copyright © 2016 Ningyu Zhang et al. All rights reserved. Select and Cluster: A Method for Finding Functional Networks of Clustered Voxels in fMRI Mon, 29 Aug 2016 08:58:53 +0000 http://www.hindawi.com/journals/cin/2016/4705162/ Extracting functional connectivity patterns among cortical regions in fMRI datasets is a challenge stimulating the development of effective data-driven or model based techniques. Here, we present a novel data-driven method for the extraction of significantly connected functional ROIs directly from the preprocessed fMRI data without relying on a priori knowledge of the expected activations. This method finds spatially compact groups of voxels which show a homogeneous pattern of significant connectivity with other regions in the brain. The method, called Select and Cluster (S&C), consists of two steps: first, a dimensionality reduction step based on a blind multiresolution pairwise correlation by which the subset of all cortical voxels with significant mutual correlation is selected and the second step in which the selected voxels are grouped into spatially compact and functionally homogeneous ROIs by means of a Support Vector Clustering (SVC) algorithm. The S&C method is described in detail. Its performance assessed on simulated and experimental fMRI data is compared to other methods commonly used in functional connectivity analyses, such as Independent Component Analysis (ICA) or clustering. S&C method simplifies the extraction of functional networks in fMRI by identifying automatically spatially compact groups of voxels (ROIs) involved in whole brain scale activation networks. Danilo DonGiovanni and Lucia Maria Vaina Copyright © 2016 Danilo DonGiovanni and Lucia Maria Vaina. All rights reserved. High-Resolution Cortical Dipole Imaging Using Spatial Inverse Filter Based on Filtering Property Mon, 29 Aug 2016 08:57:43 +0000 http://www.hindawi.com/journals/cin/2016/8404565/ Cortical dipole imaging has been developed to visualize brain electrical activity in high spatial resolution. It is necessary to solve an inverse problem to estimate the cortical dipole distribution from the scalp potentials. In the present study, the accuracy of cortical dipole imaging was improved by focusing on filtering property of the spatial inverse filter. We proposed an inverse filter that optimizes filtering property using a sigmoid function. The ability of the proposed method was compared with the traditional inverse techniques, such as Tikhonov regularization, truncated singular value decomposition (TSVD), and truncated total least squares (TTLS), in a computer simulation. The proposed method was applied to human experimental data of visual evoked potentials. As a result, the estimation accuracy was improved and the localized dipole distribution was obtained with less noise. Junichi Hori and Shintaro Takasawa Copyright © 2016 Junichi Hori and Shintaro Takasawa. All rights reserved. Extract the Relational Information of Static Features and Motion Features for Human Activities Recognition in Videos Mon, 29 Aug 2016 06:44:42 +0000 http://www.hindawi.com/journals/cin/2016/1760172/ Both static features and motion features have shown promising performance in human activities recognition task. However, the information included in these features is insufficient for complex human activities. In this paper, we propose extracting relational information of static features and motion features for human activities recognition. The videos are represented by a classical Bag-of-Word (BoW) model which is useful in many works. To get a compact and discriminative codebook with small dimension, we employ the divisive algorithm based on KL-divergence to reconstruct the codebook. After that, to further capture strong relational information, we construct a bipartite graph to model the relationship between words of different feature set. Then we use a -way partition to create a new codebook in which similar words are getting together. With this new codebook, videos can be represented by a new BoW vector with strong relational information. Moreover, we propose a method to compute new clusters from the divisive algorithm’s projective function. We test our work on the several datasets and obtain very promising results. Li Yao Copyright © 2016 Li Yao. All rights reserved. -Based Multi/Many-Objective Particle Swarm Optimization Sun, 28 Aug 2016 07:59:29 +0000 http://www.hindawi.com/journals/cin/2016/1898527/ We propose to couple the performance measure and Particle Swarm Optimization in order to handle multi/many-objective problems. Our proposal shows that through a well-designed interaction process we could maintain the metaheuristic almost inalterable and through the performance measure we did not use neither an external archive nor Pareto dominance to guide the search. The proposed approach is validated using several test problems and performance measures commonly adopted in the specialized literature. Results indicate that the proposed algorithm produces results that are competitive with respect to those obtained by four well-known MOEAs. Additionally, we validate our proposal in many-objective optimization problems. In these problems, our approach showed its main strength, since it could outperform another well-known indicator-based MOEA. Alan Díaz-Manríquez, Gregorio Toscano, Jose Hugo Barron-Zambrano, and Edgar Tello-Leal Copyright © 2016 Alan Díaz-Manríquez et al. All rights reserved. An Efficient Adaptive Window Size Selection Method for Improving Spectrogram Visualization Wed, 24 Aug 2016 17:56:34 +0000 http://www.hindawi.com/journals/cin/2016/6172453/ Short Time Fourier Transform (STFT) is an important technique for the time-frequency analysis of a time varying signal. The basic approach behind it involves the application of a Fast Fourier Transform (FFT) to a signal multiplied with an appropriate window function with fixed resolution. The selection of an appropriate window size is difficult when no background information about the input signal is known. In this paper, a novel empirical model is proposed that adaptively adjusts the window size for a narrow band-signal using spectrum sensing technique. For wide-band signals, where a fixed time-frequency resolution is undesirable, the approach adapts the constant Q transform (CQT). Unlike the STFT, the CQT provides a varying time-frequency resolution. This results in a high spectral resolution at low frequencies and high temporal resolution at high frequencies. In this paper, a simple but effective switching framework is provided between both STFT and CQT. The proposed method also allows for the dynamic construction of a filter bank according to user-defined parameters. This helps in reducing redundant entries in the filter bank. Results obtained from the proposed method not only improve the spectrogram visualization but also reduce the computation cost and achieves 87.71% of the appropriate window length selection. Shibli Nisar, Omar Usman Khan, and Muhammad Tariq Copyright © 2016 Shibli Nisar et al. All rights reserved. Applying Cost-Sensitive Extreme Learning Machine and Dissimilarity Integration to Gene Expression Data Classification Tue, 23 Aug 2016 14:03:29 +0000 http://www.hindawi.com/journals/cin/2016/8056253/ Embedding cost-sensitive factors into the classifiers increases the classification stability and reduces the classification costs for classifying high-scale, redundant, and imbalanced datasets, such as the gene expression data. In this study, we extend our previous work, that is, Dissimilar ELM (D-ELM), by introducing misclassification costs into the classifier. We name the proposed algorithm as the cost-sensitive D-ELM (CS-D-ELM). Furthermore, we embed rejection cost into the CS-D-ELM to increase the classification stability of the proposed algorithm. Experimental results show that the rejection cost embedded CS-D-ELM algorithm effectively reduces the average and overall cost of the classification process, while the classification accuracy still remains competitive. The proposed method can be extended to classification problems of other redundant and imbalanced data. Yanqiu Liu, Huijuan Lu, Ke Yan, Haixia Xia, and Chunlin An Copyright © 2016 Yanqiu Liu et al. All rights reserved. Online Hierarchical Sparse Representation of Multifeature for Robust Object Tracking Thu, 18 Aug 2016 13:55:11 +0000 http://www.hindawi.com/journals/cin/2016/5894639/ Object tracking based on sparse representation has given promising tracking results in recent years. However, the trackers under the framework of sparse representation always overemphasize the sparse representation and ignore the correlation of visual information. In addition, the sparse coding methods only encode the local region independently and ignore the spatial neighborhood information of the image. In this paper, we propose a robust tracking algorithm. Firstly, multiple complementary features are used to describe the object appearance; the appearance model of the tracked target is modeled by instantaneous and stable appearance features simultaneously. A two-stage sparse-coded method which takes the spatial neighborhood information of the image patch and the computation burden into consideration is used to compute the reconstructed object appearance. Then, the reliability of each tracker is measured by the tracking likelihood function of transient and reconstructed appearance models. Finally, the most reliable tracker is obtained by a well established particle filter framework; the training set and the template library are incrementally updated based on the current tracking results. Experiment results on different challenging video sequences show that the proposed algorithm performs well with superior tracking accuracy and robustness. Honghong Yang and Shiru Qu Copyright © 2016 Honghong Yang and Shiru Qu. All rights reserved. Consumers’ Kansei Needs Clustering Method for Product Emotional Design Based on Numerical Design Structure Matrix and Genetic Algorithms Thu, 18 Aug 2016 08:12:04 +0000 http://www.hindawi.com/journals/cin/2016/5083213/ Consumers’ Kansei needs reflect their perception about a product and always consist of a large number of adjectives. Reducing the dimension complexity of these needs to extract primary words not only enables the target product to be explicitly positioned, but also provides a convenient design basis for designers engaging in design work. Accordingly, this study employs a numerical design structure matrix (NDSM) by parameterizing a conventional DSM and integrating genetic algorithms to find optimum Kansei clusters. A four-point scale method is applied to assign link weights of every two Kansei adjectives as values of cells when constructing an NDSM. Genetic algorithms are used to cluster the Kansei NDSM and find optimum clusters. Furthermore, the process of the proposed method is presented. The details of the proposed approach are illustrated using an example of electronic scooter for Kansei needs clustering. The case study reveals that the proposed method is promising for clustering Kansei needs adjectives in product emotional design. Yan-pu Yang, Deng-kai Chen, Rong Gu, Yu-feng Gu, and Sui-huai Yu Copyright © 2016 Yan-pu Yang et al. All rights reserved. A New Artificial Neural Network Approach in Solving Inverse Kinematics of Robotic Arm (Denso VP6242) Wed, 17 Aug 2016 16:49:18 +0000 http://www.hindawi.com/journals/cin/2016/5720163/ This paper presents a novel inverse kinematics solution for robotic arm based on artificial neural network (ANN) architecture. The motion of robotic arm is controlled by the kinematics of ANN. A new artificial neural network approach for inverse kinematics is proposed. The novelty of the proposed ANN is the inclusion of the feedback of current joint angles configuration of robotic arm as well as the desired position and orientation in the input pattern of neural network, while the traditional ANN has only the desired position and orientation of the end effector in the input pattern of neural network. In this paper, a six DOF Denso robotic arm with a gripper is controlled by ANN. The comprehensive experimental results proved the applicability and the efficiency of the proposed approach in robotic motion control. The inclusion of current configuration of joint angles in ANN significantly increased the accuracy of ANN estimation of the joint angles output. The new controller design has advantages over the existing techniques for minimizing the position error in unconventional tasks and increasing the accuracy of ANN in estimation of robot’s joint angles. Ahmed R. J. Almusawi, L. Canan Dülger, and Sadettin Kapucu Copyright © 2016 Ahmed R. J. Almusawi et al. All rights reserved. EEG-Based BCI System Using Adaptive Features Extraction and Classification Procedures Wed, 17 Aug 2016 13:49:06 +0000 http://www.hindawi.com/journals/cin/2016/4562601/ Motor imagery is a common control strategy in EEG-based brain-computer interfaces (BCIs). However, voluntary control of sensorimotor (SMR) rhythms by imagining a movement can be skilful and unintuitive and usually requires a varying amount of user training. To boost the training process, a whole class of BCI systems have been proposed, providing feedback as early as possible while continuously adapting the underlying classifier model. The present work describes a cue-paced, EEG-based BCI system using motor imagery that falls within the category of the previously mentioned ones. Specifically, our adaptive strategy includes a simple scheme based on a common spatial pattern (CSP) method and support vector machine (SVM) classification. The system’s efficacy was proved by online testing on 10 healthy participants. In addition, we suggest some features we implemented to improve a system’s “flexibility” and “customizability,” namely, (i) a flexible training session, (ii) an unbalancing in the training conditions, and (iii) the use of adaptive thresholds when giving feedback. Valeria Mondini, Anna Lisa Mangia, and Angelo Cappello Copyright © 2016 Valeria Mondini et al. All rights reserved. Deep Convolutional Extreme Learning Machine and Its Application in Handwritten Digit Classification Wed, 17 Aug 2016 09:46:58 +0000 http://www.hindawi.com/journals/cin/2016/3049632/ In recent years, some deep learning methods have been developed and applied to image classification applications, such as convolutional neuron network (CNN) and deep belief network (DBN). However they are suffering from some problems like local minima, slow convergence rate, and intensive human intervention. In this paper, we propose a rapid learning method, namely, deep convolutional extreme learning machine (DC-ELM), which combines the power of CNN and fast training of ELM. It uses multiple alternate convolution layers and pooling layers to effectively abstract high level features from input images. Then the abstracted features are fed to an ELM classifier, which leads to better generalization performance with faster learning speed. DC-ELM also introduces stochastic pooling in the last hidden layer to reduce dimensionality of features greatly, thus saving much training time and computation resources. We systematically evaluated the performance of DC-ELM on two handwritten digit data sets: MNIST and USPS. Experimental results show that our method achieved better testing accuracy with significantly shorter training time in comparison with deep learning methods and other ELM methods. Shan Pang and Xinyi Yang Copyright © 2016 Shan Pang and Xinyi Yang. All rights reserved. Theory and Applications of Bioinspired Neural Intelligence for Robotics and Control Sun, 14 Aug 2016 11:40:10 +0000 http://www.hindawi.com/journals/cin/2016/5089767/ Simon X. Yang, Chaomin Luo, Howard Li, Jianjun Ni, and Jianwei Zhang Copyright © 2016 Simon X. Yang et al. All rights reserved.