F. Ham, R. Acharyya, Young-Chan Lee, M. Garcés, D. Fee, Chelsea Whitten, Eric Rivera
{"title":"Classification of Infrasound Surf Events Using Parallel Neural Network Banks","authors":"F. Ham, R. Acharyya, Young-Chan Lee, M. Garcés, D. Fee, Chelsea Whitten, Eric Rivera","doi":"10.1109/IJCNN.2007.4371046","DOIUrl":"https://doi.org/10.1109/IJCNN.2007.4371046","url":null,"abstract":"One of the most active locations in the world for ocean surf is the North Shore of Oahu. Here we show surf waves from three locations, \"Pinballs,\" \"Pipeline,\" and \"Shark's cove,\" on the North Shore yield distinctive infrasonic signatures that can be used to train and test a neural network classifier. A parallel neural network classifier bank (PNNCB) is developed to classify the surf events from the three different locations on Oahu. Each module in the bank is a radial basis function (RBF) network responsible for classifying one of the three surf events. However, each module is also trained to not classify the other two surf events, and this ultimately increases the overall classifier performance. Output thresholds of each module are set according to a specific three-dimensional receiver operating characteristic (ROC) curve. For the three surf events, the correct classification rate achieved is 87.1%. A confusion matrix of the complete neural network classifier bank is shown along with confidence intervals for each class and the overall accuracy.","PeriodicalId":350091,"journal":{"name":"2007 International Joint Conference on Neural Networks","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125397945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Power Transformers Diagnosis Using Neural Networks","authors":"Marcela P. Moreira, L. T. B. Santos, M. Vellasco","doi":"10.1109/IJCNN.2007.4371253","DOIUrl":"https://doi.org/10.1109/IJCNN.2007.4371253","url":null,"abstract":"Power transformers are one of the most used and expensive equipments in many substations of electric energy. This fact justifies the application of predictive techniques of diagnosis, with the objective to minimize possible failures and to increase the trustworthiness of the system. Amongst these techniques, one of the most distinguished are the analysis of gases dissolved in the oil (gaseous chromatography) and the physical-chemical analysis of the isolating oil. Although their generalized use, the diagnosis made by these techniques presents deficiencies, demanding the presence of specialists to complete the diagnosis. A great contribution for the electric sector would be a decision support tool capable of providing a correct and automatic diagnosis, to improve the monitoring process of power transformers. This article presents a diagnosis system, based on two artificial neural networks, each dedicated to the analysis of gaseous chromatography and physical-chemical of the isolating oil, respectively. The idea to enclose these two techniques is to accomplish a more complete diagnosis of the equipment, as well as a reduction of specialists' participation, creating a more automatic diagnosis system. The obtained results with the proposed system are compared with traditional methods. The resultant system represents a more complete decision support tool in the determination of the diagnosis of power transformers.","PeriodicalId":350091,"journal":{"name":"2007 International Joint Conference on Neural Networks","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126500619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Bayesian Signal Classifier","authors":"C. Chow, S. Y. Yuen","doi":"10.1109/IJCNN.2007.4370956","DOIUrl":"https://doi.org/10.1109/IJCNN.2007.4370956","url":null,"abstract":"This article points out the limitations of vectoral input pattern on density estimation and Bayesian classification. A continuous Bayesian classifier is proposed to tackle these limitations. The classifier accepts signal as input pattern; thus the problem of optimal description length selection is avoided. The algorithm is evaluated on signal clustering and distribution classification.","PeriodicalId":350091,"journal":{"name":"2007 International Joint Conference on Neural Networks","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121394566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Incremental Learning for Classification of Protein Sequences","authors":"S. Mohamed, D. Rubin, T. Marwala","doi":"10.1109/IJCNN.2007.4370924","DOIUrl":"https://doi.org/10.1109/IJCNN.2007.4370924","url":null,"abstract":"The problem of protein structural family classification remains a core problem in computational biology, with application of this technology applicable to problems in drug discovery programs and hypothetical protein annotation. Many machine learning tools have been applied to this problem using static machine learning structures such as neural networks or support vector machines that are unable to accommodate new information into their existing models. We utilize the fuzzy ARTMAP as an alternate machine learning system that has the ability of incrementally learning new data as it becomes available. The fuzzy ARTMAP is found to be comparable to many of the widespread machine learning systems. The use of an evolutionary strategy in the selection and combination of individual classifiers into an ensemble system, coupled with the incremental learning ability of the fuzzy ARTMAP is proven to be suitable as a pattern classifier. The algorithm presented is tested using data from the G-Coupled Protein Receptors Database and shows good accuracy of 83%.","PeriodicalId":350091,"journal":{"name":"2007 International Joint Conference on Neural Networks","volume":"279 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123090189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Just-in-time Adaptive Classifiers in Non-Stationary Conditions","authors":"C. Alippi, M. Roveri","doi":"10.1109/IJCNN.2007.4371097","DOIUrl":"https://doi.org/10.1109/IJCNN.2007.4371097","url":null,"abstract":"In real world applications ageing effects, process drifts, soft and hard faults may affect the data generation mechanism and, as a consequence, data coming from it. Intelligent measurement systems developed for such processes (e.g., industrial quality assessment and control, environmental monitoring) require adaptive techniques which, by tracking the system evolution, allow the intelligent system for keeping acceptable performance. Here we focus on adaptive classifiers embedded in intelligent measurement systems designed to cope with non-stationary environments, yet well performing in stationary conditions. The novelty of the approach resides in the possibility to update in a just-in-time fashion, i.e., only when it is really needed, the knowledge base of the classifier. A large experimental campaign shows the effectiveness of the proposed design.","PeriodicalId":350091,"journal":{"name":"2007 International Joint Conference on Neural Networks","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126343288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Portable Biomimetic Retina for Learning, Perception-based Image Acquisition","authors":"R. Eckmiller, R. Schatten, O. Baruth","doi":"10.1109/IJCNN.2007.4371340","DOIUrl":"https://doi.org/10.1109/IJCNN.2007.4371340","url":null,"abstract":"We developed a portable biomimetic retina for blind subjects with retinal defects. 1-To simplify the visual prosthetic function, image segmentation of input patterns PI was provided by a set of line elements with specific lengths and orientations. 2-The segmented images were mapped by a filter module (FM: array of tunable spatio-temporal (ST) filters) onto a data stream as future stimulation signals for the human central visual system. 3-The foveal region of the central visual system was simulated by an inverter module (IM) to test the generation of a visual percept P2 of a given PI before the entire system will be applied to blind humans. 4-The parameter vector (PV) of FM could be modified interactively by the human user with evolutionary algorithms (EA) based on a perceptual comparison. 5-Two small displays for separate presentation of PI and the simulated percept P2 were integrated in a lightweight head mount and were combined with a 3-D acceleration sensor (AS) for head movement detection. 6-Subjects with normal vision were able to tune FM in a perception-based dialog exclusively by means of specific small head movements and to iteratively select the best three out of six possible percepts P2 until the output of IM, P2 became identical to a given PI.","PeriodicalId":350091,"journal":{"name":"2007 International Joint Conference on Neural Networks","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122313356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Neural Network Control of Robot Formations using RISE Feedback","authors":"T. Dierks, S. Jagannathan","doi":"10.1109/IJCNN.2007.4371402","DOIUrl":"https://doi.org/10.1109/IJCNN.2007.4371402","url":null,"abstract":"In this paper, a combined kinematic/torque control law is developed for leader-follower based formation control using backstepping in order to accommodate the dynamics of the robots and the formation in contrast with kinematic-based formation controllers that are widely reported in the literature. A neural network (NN) is introduced along with robust integral of the sign of the error (RISE) feedback to approximate the dynamics of the follower as well as its leader using online weight tuning. It is shown using Lyapunov theory that the errors for the entire formation are asymptotically stable and the NN weights are bounded as opposed to uniformly ultimately bounded (UUB) stability which is typical with most NN controllers. Theoretical results are demonstrated using numerical simulations.","PeriodicalId":350091,"journal":{"name":"2007 International Joint Conference on Neural Networks","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126104622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Similarity-based Image Retrieval by Self-Organizing Map with Refractoriness","authors":"Kouhei Nagashima, Masao Nakada, Y. Osana","doi":"10.1109/IJCNN.2007.4371376","DOIUrl":"https://doi.org/10.1109/IJCNN.2007.4371376","url":null,"abstract":"In this research, we proposed a similarity-based image retrieval by self-organizing map with refractoriness. In the self-organizing map with refractoriness, the plural neurons in the map layer corresponding to the input can fire sequentially because of the refractoriness. The image retrieval system using the self-organizing map with refractoriness makes use of this property in order to retrieve plural similar images. In this image retrieval system, as the image feature, not only color information but also spectrum, impression words and key words are employed. We carried out a series of computer experiments and confirmed that the effectiveness of the proposed system.","PeriodicalId":350091,"journal":{"name":"2007 International Joint Conference on Neural Networks","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116198998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Acoustic Modeling using Vector Quantization in Kernel Feature Space and Classification using String Kernel based Support Vector Machines","authors":"R. Anitha, C. Sekhar","doi":"10.1109/IJCNN.2007.4371182","DOIUrl":"https://doi.org/10.1109/IJCNN.2007.4371182","url":null,"abstract":"In this paper, we propose an approach to acoustic modeling using vector quantization in a Mercer kernel feature space to obtain a sequence of codebook indices, and then use a support vector machine based classifier to classify the sequence of codebook indices. Clustering and vector quantization in the kernel feature space induced by a nonlinear innerproduct kernel is helpful in proper separation of nonlinearly separable clusters in the input acoustic feature space. Effectiveness of the proposed approach to acoustic modeling is demonstrated for recognition of spoken letters in E-set of English alphabet, and for recognition of a large number of consonant-vowel type subword units in continuous speech of three Indian languages. Performance of the proposed approach to acoustic modeling is compared with that of a continuous density hidden Markov model based classifier in the input acoustic feature space. Though there is a significant loss of information due to discretization involved in vector quantization, the proposed approach gives a performance better than that of classifiers using the continuous valued acoustic feature representation.","PeriodicalId":350091,"journal":{"name":"2007 International Joint Conference on Neural Networks","volume":"42 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120987236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Automated Abstraction of Dynamic Neural Systems for Natural Language Processing","authors":"H. Jacobsson, S. Frank, D. Federici","doi":"10.1109/IJCNN.2007.4371171","DOIUrl":"https://doi.org/10.1109/IJCNN.2007.4371171","url":null,"abstract":"This paper presents a variant of the crystallizing substochastic sequential machine extractor (CrySSMEx), an algorithm capable of extracting finite state descriptions of dynamic systems, such as recurrent neural networks, without any regard to their topology or weights. The algorithm is applied to a network trained on a language prediction task. The extracted state machines provide a detailed view of the operations of the RNN by abstracting and discretizing its functional behaviour. Here we extend previous work and extract state machines in Moore, rather than in Mealy, format. This subtle difference opens up the rule extractor to more domains, including sensorimotor modelling of autonomous robotic systems. Experiments are also conducted on far more input symbols, providing a greater insight into the behaviour of the algorithm.","PeriodicalId":350091,"journal":{"name":"2007 International Joint Conference on Neural Networks","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123884298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}