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Wyszukujesz frazę "Neural Networks" wg kryterium: Temat


Tytuł:
Object classification with artificial neural networks : A comparative analysis
Autorzy:
Domeradzki, Kornel
Niewiadomski, Artur
Powiązania:
https://bibliotekanauki.pl/articles/1819259.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Przyrodniczo-Humanistyczny w Siedlcach
Tematy:
object classification
neural networks
convolutional neural networks
residual neural networks
Opis:
Object classification is a problem which has attracted a lot of research attention in recent years. Traditional approach to this problem is built on a shallow trainable architecture that was meant to detect handcrafted features. That approach works poorly and introduces many complications in situations where one is to work with more than a couple types of objects in an image with a large resolution. That is why in the past few years convolutional and residual neural networks have experienced a tremendous rise in popularity. In this paper, we provide a review on topics related to artificial neural networks and a brief overview of our research. Our review begins with a short introduction to the topic of computer vision. Afterwards we cover briefly the concepts of neural networks, convolutional and residual neural networks and their commonly used models. Then we provide a comparative performance analysis of the previously mentioned models in a binary and multi-label classification problem. Finally, multiple conclusions are drawn, which are to serve as guidelines for future computer vision systems implementations.
Źródło:
Studia Informatica : systems and information technology; 2019, 1-2(23); 43--56
1731-2264
Pojawia się w:
Studia Informatica : systems and information technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Information Technology of Stock Indexes Forecasting on the Base of Fuzzy Neural Networks
Autorzy:
Tryus, Y.
Antipova, N.
Zhuravel, K.
Zaspa, G.
Powiązania:
https://bibliotekanauki.pl/articles/118277.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
neural networks
fuzzy neural networks
forecasting
stock indexes
Opis:
In this research the information technology for stock indexes forecast on the base of fuzzy neural networks was created. The possibility of its use for multi-parameter short-time stock indexes forecasts, in particular S&P500, DJ, NASDAC was checked. The created information technology is used making several consequential steps. The stock indexes forecast numeral experiment based on real data for period of several years with use of the technology offered was made.
Źródło:
Applied Computer Science; 2017, 13, 1; 29-40
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The recognition of partially occluded objects with support vector machines, convolutional neural networks and deep belief networks
Autorzy:
Chu, J. L.
Krzyżak, A.
Powiązania:
https://bibliotekanauki.pl/articles/91650.pdf
Data publikacji:
2014
Wydawca:
Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
Tematy:
neural networks
belief networks
convolutional neural networks
artificial neural networks
Deep Belief Network
generative model
Opis:
Biologically inspired artificial neural networks have been widely used for machine learning tasks such as object recognition. Deep architectures, such as the Convolutional Neural Network, and the Deep Belief Network have recently been implemented successfully for object recognition tasks. We conduct experiments to test the hypothesis that certain primarily generative models such as the Deep Belief Network should perform better on the occluded object recognition task than purely discriminative models such as Convolutional Neural Networks and Support Vector Machines. When the generative models are run in a partially discriminative manner, the data does not support the hypothesis. It is also found that the implementation of Gaussian visible units in a Deep Belief Network trained on occluded image data allows it to also learn to effectively classify non-occluded images.
Źródło:
Journal of Artificial Intelligence and Soft Computing Research; 2014, 4, 1; 5-19
2083-2567
2449-6499
Pojawia się w:
Journal of Artificial Intelligence and Soft Computing Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Membership function - ARTMAP neural networks
Autorzy:
Sinčák, P.
Hric, M.
Vaščák, J.
Powiązania:
https://bibliotekanauki.pl/articles/1931570.pdf
Data publikacji:
2003
Wydawca:
Politechnika Gdańska
Tematy:
pattern recognition principles
classifier design
classification accuracy assessment
contingency tables
backpropagation neural networks
fuzzy BP neural networks
ART and ARTMAP neural networks
modular neural networks
neural networks
Opis:
The project deals with the application of computational intelligence (CI) tools for multispectral image classification. Pattern Recognition scheme is a global approach where the classification part is playing an important role to achieve the highest classification accuracy. Multispectral images are data mainly used in remote sensing and this kind of classification is very difficult to assess the accuracy of classification results. There is a feedback problem in adjusting the parts of pattern recognition scheme. Precise classification accuracy assessment is almost impossible to obtain, being an extremely laborious procedure. The paper presents simple neural networks for multispectral image classification, ARTMAP-like neural networks as more sophisticated tools for classification, and a modular approach to achieve the highest classification accuracy of multispectral images. There is a strong link to advances in computer technology, which gives much better conditions for modelling more sophisticated classifiers for multispectral images.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2003, 7, 1; 43-52
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Distribution of the tree parity machine synchronization time
Autorzy:
Dolecki, M.
Kozera, R.
Powiązania:
https://bibliotekanauki.pl/articles/102097.pdf
Data publikacji:
2013
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
neural networks
neurocryptography
Opis:
Neural networks’ synchronization by mutual learning discovered and described by Kanter et al. [12] can be used to construct relatively secure cryptographic key exchange protocol in the open channel. This phenomenon based on simple mathematical operations, can be performed fast on a computer. The latter makes it competitive to the currently used cryptographic algorithms. An additional advantage is the easiness in system scaling by adjusting neutral network’s topology, what results in satisfactory level of security [24] despite different attack attempts [12, 15]. With the aid of previous experiments, it turns out that the above synchronization procedure is a stochastic process. Though the time needed to achieve compatible weights vectors in both partner networks depends on their topology, the histograms generated herein render similar distribution patterns. In this paper the simulations and the analysis of synchronizations’ time are performed to test whether these histograms comply with histograms of a particular well-known statistical distribution. As verified in this work, indeed they coincide with Poisson distribution. The corresponding parameters of the empirically established Poisson distribution are also estimated in this work. Evidently the calculation of such parameters permits to assess the probability of achieving both networks’ synchronization in a given time only upon resorting to the generated distribution tables. Thus, there is no necessity of redoing again time-consuming computer simulations.
Źródło:
Advances in Science and Technology. Research Journal; 2013, 7, 18; 20-27
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Distance of the initial weights of tree parity machine drawn from different distributions
Autorzy:
Dolecki, M.
Kozera, R.
Powiązania:
https://bibliotekanauki.pl/articles/102120.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
neural networks
neurocryptography
Opis:
It is well-known that artificial neural networks have the ability to learn based on the provisions of new data. A special case of the so-called supervised learning is a mutual learning of two neural networks. This type of learning applied to a specific networks called Tree Parity Machines (abbreviated as TPM networks) leads to achieving consistent weight vectors in both of them. Such phenomenon is called a network synchronization and can be exploited while constructing cryptographic key exchange protocol. At the beginning of the learning process both networks have initialized weights values as random. The time needed to synchronize both networks depends on their initial weights values and the input vectors which are also randomly generated at each step of learning. In this paper the relationship between the distribution, from which the initial weights of the network are drawn, and their compatibility is discussed. In order to measure the initial compatibility of the weights, the modified Euclidean metric is invoked here. Such a tool permits to determine the compatibility of the network weights’ scaling in regard to the size of the network. The proper understanding of the latter permits in turn to compare TPM networks of various sizes. This paper contains the results of the simulation and their discussion in the context of the above mentioned issue.
Źródło:
Advances in Science and Technology. Research Journal; 2015, 9, 26; 137--142
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Searching for optimal size neural networks in Assembler Encoding
Autorzy:
Praczyk, T.
Powiązania:
https://bibliotekanauki.pl/articles/970178.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
evolutionary neural networks
Opis:
Assembler Encoding represents a neural network in the form of a simple program called Assembler Encoding Program. The task of the program is to create the so-called Network Definition Matrix, which maintains all the information necessary to construct a network. To generate the programs and, in consequence, neural networks, evolutionary techniques are used. One of the problems in Assembler Encoding is to determine an optimal number of neurons in a neural network. To deal with this problem a current version of Assembler Encoding uses a solution that is time consuming and hence rather impractical. The paper proposes four other solutions to the problem mentioned. To test them, experiments in a predator-prey problem were carried out. The results of the experiments are included at the end of the paper.
Źródło:
Control and Cybernetics; 2010, 39, 4; 1193-1215
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nonlinear position estimators based on artificial neural networks for low costs manufacturing systems
Autorzy:
Dogruer, C.
Kilic, E.
Dolen, M.
Koku, B.
Powiązania:
https://bibliotekanauki.pl/articles/384449.pdf
Data publikacji:
2007
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
neural networks
esimators
Opis:
The accurate contral of CNC machine axis requires relatively expensive direct measurement sensors. In this paper, artificial neural network based position error estimators are comparatively evaluated as a part of a low-cost (but high performance) manufacturing system. Such schemes are very effective when the system is rot subjected to external loads as well as widely changing operating conditions such as ambient temperature.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2007, 1, 2; 40-44
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Automatic Fault Classification for Journal Bearings Using ANN and DNN
Autorzy:
Narendiranath Babu, T.
Aravind, A.
Rakesh, A.
Jahzan, M.
Rama Prabha, D.
Ramalinga Viswanathan, M.
Powiązania:
https://bibliotekanauki.pl/articles/177579.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
journal bearing
fault classification
artificial neural networks
deep neural networks
Opis:
Journal bearings are the most common type of bearings in which a shaft freely rotates in a metallic sleeve. They find a lot of applications in industry, especially where extremely high loads are involved. Proper analysis of the various bearing faults and predicting the modes of failure beforehand are Essentials to increase the working life of the bearing. In the current study, the vibration data of a journal Bering in the healthy condition and in five different fault conditions are collected. A feature extraction metod is employed to classify the different fault conditions. Automatic fault classification is performed using artificial neural networks (ANN). As the probability of a correct prediction goes down for a higher number of faults in ANN, the method is made more robust by incorporating deep neural networks (DNN) with the help of autoencoders. Training was done using the scaled conjugate gradient algorithm and the performance was calculated by the cross entropy method. Due to the increased number of hidden layers in DNN, it is possible to achieve a high efficiency of 100% with the feature extraction method.
Źródło:
Archives of Acoustics; 2018, 43, 4; 727-738
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of EMD ANN and DNN for Self-Aligning Bearing Fault Diagnosis
Autorzy:
Narendiranath, B. T.
Aravind, A.
Rakesh, A.
Jahzan, M.
Rama, P. D.
Powiązania:
https://bibliotekanauki.pl/articles/176889.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
self-aligning bearing
fault classification
artificial neural networks
deep neural networks
Opis:
Self-aligning roller bearings are an integral part of the industrial machinery. The proper analysis and prediction of the various faults that may happen to the bearing beforehand contributes to an increase in the working life of the bearing. This study aims at developing a novel method for the analysis of the various faults in self-aligning bearings as well as the automatic classification of faults using artificial neural network (ANN) and deep neural network (DNN). The vibration data is collected for six different faults as well as for the healthy bearing. Empirical mode decomposition (EMD) followed by Hilbert Huang transform is used to extract instantaneous frequency peaks which are used for fault analysis. Time domain and time-frequency domain features are then extracted which are used to implement the neural networks through the pattern recognition tool in MATLAB. A comparative study of the outputs from the two neural networks is also performed. From the confusion matrix, the efficiency of the ANN has been found to be 95.7% and using DNN has been found to be 100%.
Źródło:
Archives of Acoustics; 2018, 43, 2; 163-175
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of neurocomputing in the parametric identification using dynamic responses of structural elements - selected problems
Identyfikacja parametrów konstrukcji na podstawie dynamicznych odpowiedzi z wykorzystaniem sieci neuronowych - wybrane zagadnienia
Autorzy:
Ziemiański, L.
Miller, B.
Piątkowski, G.
Powiązania:
https://bibliotekanauki.pl/articles/281927.pdf
Data publikacji:
2004
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
neural networks dynamics
identification
Opis:
Some problems of neurocomputing in the dynamics of structures are presented: 1) damage detection using wave propagation, 2) updating of portal frames finite element models, 3) detection of the void and additional mass in cantilever plates, 4) neural network modelling of an "artificial boundary condition". The analysed problems are related to both data prepared by computational systems and that taken from experimental evidence.
W artykule przedstawiono zastosowanie sieci neuronowych w wybranych zagadnieniach dynamiki konstrukcji: 1) wykrywanie uszkodzeń w elementach prętowych na podstawie propagacji fali, 2) dostrajanie modeli MES ram portalowych, 3) wykrywanie pustki i dodatkowej masy w drgającej płycie wspornikowej, 4) modelowanie "sztucznej granicy" w zagadnieniu propagacji fali. Rozpatrywane problemy dotyczą zarówno modeli numerycznych, jak i eksperymentalnych.
Źródło:
Journal of Theoretical and Applied Mechanics; 2004, 42, 3; 667-693
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Enhancing constructive neural network performance using functionally expanded input data
Autorzy:
Bertini, Jr., J. R.
Carmo Nicoletti, do, M.
Powiązania:
https://bibliotekanauki.pl/articles/91786.pdf
Data publikacji:
2016
Wydawca:
Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
Tematy:
constructive neural networks
functional link artificial neural networks
functionally expanded input data
Opis:
Constructive learning algorithms are an efficient way to train feedforward neural networks. Some of their features, such as the automatic definition of the neural network (NN) architecture and its fast training, promote their high adaptive capacity, as well as allow for skipping the usual pre-training phase, known as model selection. However, such advantages usually come with the price of lower accuracy rates, when compared to those obtained with conventional NN learning approaches. This is, perhaps, the reason for conventional NN training algorithms being preferred over constructive NN (CoNN) algorithms. Aiming at enhancing CoNN accuracy performance and, as a result, making them a competitive choice for machine learning based applications, this paper proposes the use of functionally expanded input data. The investigation described in this paper considered six two-class CoNN algorithms, ten data domains and seven polynomial expansions. Results from experiments, followed by a comparative analysis, show that performance rates can be improved when CoNN algorithms learn from functionally expanded input data.
Źródło:
Journal of Artificial Intelligence and Soft Computing Research; 2016, 6, 2; 119-131
2083-2567
2449-6499
Pojawia się w:
Journal of Artificial Intelligence and Soft Computing Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inversion of fuzzy neural networks for the reduction of noise in the control loop for automotive applications
Autorzy:
Nentwig, M.
Mercorelli, P.
Powiązania:
https://bibliotekanauki.pl/articles/384669.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
neural networks
fuzzy control
inversion of neural networks
automotive control
noise reduction
Opis:
A robust throttle valve control has been an attractive problem since throttle by wire systems were established in the mid-nineties. Control strategies often use a feed-forward controller which use an inverse model; however, mathematical model inversions imply a high order of differentiation of the state variables resulting in noise effects. In general, neural networks are a very effective and popular tool for modelling. The inversion of a neural network makes it possible to use these networks in control problem schemes. This paper presents a control strategy based upon an inversion of a feed-forward trained local linear model tree. The local linear model tree is realized through a fuzzy neural network. Simulated results from real data measurements are presented, and two control loops are explicitly compared.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2009, 3, 3; 83-89
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Single-ended quality measurement of a music content via convolutional recurrent neural networks
Autorzy:
Organiściak, Kamila
Borkowski, Józef
Powiązania:
https://bibliotekanauki.pl/articles/1849158.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
audio data analysis
artefacts detection
convolutional neural networks
recurrent neural networks
classification model
Opis:
The paper examines the usage of Convolutional Bidirectional Recurrent Neural Network (CBRNN) for a problem of quality measurement in a music content. The key contribution in this approach, compared to the existing research, is that the examined model is evaluated in terms of detecting acoustic anomalies without the requirement to provide a reference (clean) signal. Since real music content may include some modes of instrumental sounds, speech and singing voice or different audio effects, it is more complex to analyze than clean speech or artificial signals, especially without a comparison to the known reference content. The presented results might be treated as a proof of concept, since some specific types of artefacts are covered in this paper (examples of quantization defect, missing sound, distortion of gain characteristics, extra noise sound). However, the described model can be easily expanded to detect other impairments or used as a pre-trained model for other transfer learning processes. To examine the model efficiency several experiments have been performed and reported in the paper. The raw audio samples were transformed into Mel-scaled spectrograms and transferred as input to the model, first independently, then along with additional features (Zero Crossing Rate, Spectral Contrast). According to the obtained results, there is a significant increase in overall accuracy (by 10.1%), if Spectral Contrast information is provided together with Mel-scaled spectrograms. The paper examines also the influence of recursive layers on effectiveness of the artefact classification task.
Źródło:
Metrology and Measurement Systems; 2020, 27, 4; 721-733
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A phonological encoding of Turkish for neural networks
Autorzy:
Stachowski, Kamil
Powiązania:
https://bibliotekanauki.pl/articles/634635.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
experimental phonology, neural networks, Turkish
Opis:
The paper proposes a multi-dimensional, phonologically-aware numeric encoding of Turkish for use with neural networks. The system is evaluated and compared to PatPho (Li/MacWhinney 2002) in a test in which the network computes the shape of the past tense suffix.
Źródło:
Studia Linguistica Universitatis Iagellonicae Cracoviensis; 2015, 129, 4
2083-4624
Pojawia się w:
Studia Linguistica Universitatis Iagellonicae Cracoviensis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The assurance of liquidity in a small enterprise by the application of reverse approach
Autorzy:
Kluge, P. D.
Relich, M.
Bach, I.
Powiązania:
https://bibliotekanauki.pl/articles/118251.pdf
Data publikacji:
2006
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
liquidity
reverse approach
neural networks
Opis:
This paper presents how to assure the desirable liquidity level in a small enterprise with the application of the reverse approach. It is an alternative approach as compared to the ones that have been applied so far and which were based on the setting conditions required to obtain the desirable financial liquidity level. The example analysed in this paper led to the comparison of the conventional approach results with the reverse approach results.
Źródło:
Applied Computer Science; 2006, 2, 2; 117-128
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Parallel implementation of neural networks with the use of GPGPU technology OpenCL
Autorzy:
Kłyś, M.
Szymczyk, M.
Szymczyk, P.
Gajer, M.
Powiązania:
https://bibliotekanauki.pl/articles/114679.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
OpenCL
Artificial Neural Networks
GPGPU
Opis:
The article discusses possibilities of implementing a neural network in a parallel way. The issues of implementation are illustrated with the example of the non-linear neural network. Parallel implementation of earlier mentioned neural network is written with the use of OpenCL library, which is a representative of software supporting general-purpose computing on graphics processor units (GPGPU). The obtained results demonstrate that some group of algorithms can be computed faster if they are implemented in a parallel way and run on a multi-core processor (CPU) or a graphics processing unit (GPU). In case of the GPU, the implemented algorithm should be divided into many threads in order to perform computations faster than on a multi-core CPU. In general, computations on a GPU should be performed when there is a need to process a large amount of data with the use of algorithm which is very well suited to parallel implementation.
Źródło:
Measurement Automation Monitoring; 2015, 61, 1; 16-20
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The development of Kalman Filter learning technique for Artificial Neural Networks
Autorzy:
Krok, A.
Powiązania:
https://bibliotekanauki.pl/articles/308081.pdf
Data publikacji:
2013
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
Artificial Neural Networks
Kalman filter
Opis:
The paper presents an idea of using the Kalman Filtering (KF) for learning the Artificial Neural Networks (ANN). It is shown that KF can be fully competitive or more beneficial method with comparison standard Artificial Neural Networks learning techniques. The development of the method is presented respecting selective learning of chosen part of ANN. Another issue presented in this paper is the author’s concept of automatic selection of architecture of ANN learned by means of KF based on removing unnecessary connection inside the network. The effectiveness of presented ideas is illustrated on the examples of time series modeling and prediction. Considered data came from the experiments and situ measurements in the field of structural mechanics and materials.
Źródło:
Journal of Telecommunications and Information Technology; 2013, 4; 16-21
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of genetically evolved neural networks to dynamic terrain generation
Autorzy:
Chomątek, L.
Rudnicki, M.
Powiązania:
https://bibliotekanauki.pl/articles/202394.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
evolving neural networks
water erosion
Opis:
Real time terrain generation is a vital part in the development of realistic computer simulations and games. Dynamic terrain generation influences the realism of simulation, because its participants have to adapt to the current environment conditions. Dynamically generated primary terrain is transformed in order to reflect natural phenomena, such as thermal and water erosion, avalanches or glaciers. In this article a possibility of primary terrain transformation with application of artificial neural networks is shown. The networks are trained by evolutionary algorithms to solve a problem of a water erosion phenomenon. Obtained results show that application of such neural networks to this problem can significantly reduce the processing time needed to perform the process of modeling the natural phenomena.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2011, 59, 1; 3-8
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Application of Neural Networks to the Process of Gaining and Consolidating the Knowledge
Autorzy:
Plichta, A.
Powiązania:
https://bibliotekanauki.pl/articles/308445.pdf
Data publikacji:
2012
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
e-learning
neural networks
orthography
Opis:
The e-learning course is one of the most efficient and promising didactic policies. It must be grounded on the revision because it was proved that it enhances the longterm memory. However, human mind is not a uniform phenomenon. Each man memorizes and learns in a different manner. The purpose of the intelligent e-learning system presented in this paper is to teach orthography and this system is based on the multilayer neural network. Such structure enables a learner to adjust the crucial period between revisions to personal learning habits and policy.
Źródło:
Journal of Telecommunications and Information Technology; 2012, 1; 90-95
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multi-layered Bayesian Neural Networks for Simulation and Prediction Stress-Strain Time Series
Autorzy:
Krok, A.
Powiązania:
https://bibliotekanauki.pl/articles/308596.pdf
Data publikacji:
2015
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
Bayesian neural networks
Kalman filtering
Opis:
The aim of the paper is to investigate the differences as far as the numerical accuracy is concerned between feedforward layered Artificial Neural Networks (ANN) learned by means of Kalman filtering (KF) and ANN learned by means of the evidence procedure for Bayesian technique. The stress-strain experimental time series for concrete hysteresis loops obtained by the experiment of cyclic loading is presented as considered example.
Źródło:
Journal of Telecommunications and Information Technology; 2015, 3; 45-51
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Data security based on neural networks
Autorzy:
Noaman, K.M.G.
Jalab, H.A.
Powiązania:
https://bibliotekanauki.pl/articles/1964155.pdf
Data publikacji:
2005
Wydawca:
Politechnika Gdańska
Tematy:
data security
cryptography
neural networks
Opis:
The paper is concerned with the study and design of a data security system based on neural networks. Data with different keys were taken as test data, encrypted, decrypted and compared with the original data. The results have confirmed its advantages over other techniques.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2005, 9, 4; 409-414
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Smart sensor for operational load measurements
Inteligentny sensor do pomiaru obciążeń w czasie pracy
Autorzy:
Uhl, T.
Petko, M.
Powiązania:
https://bibliotekanauki.pl/articles/281279.pdf
Data publikacji:
2002
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
smart sensor
mechatronics
neural networks
Opis:
The important technique enabling machine health monitoring and fault localisation is operational load measurement; however direct measurement is usually difficult or even impossible. The paper deals with the realisation of the idea of developing "smart sensor" which estimates the load based on structure response. In the case study, hardware neural network has been used to obtain the load course from the vibrations in specific points of the structure. The paper covers also problems with prototyping and implementation stages during development of signal processing algorithms with emphasis placed on ASIC/FPGA based hardware platform, for which a methodology of implementation is formulated and validated by practical application to the smart sensor problem. Details of the procedure are presented along with the tools used and results obtained during its realization. Performance of the device during experiment is analysed and, finally, conclusion are shown.
Ważną techniką wykorzystywaną w monitorowaniu stanu technicznego maszyn i lokalizacji uszkodzeń jest pomiar obciążeń w czasie ich pracy. Jednak bezpośredni pomiar jest zwykle trudny albo nawet niemożliwy. Artykuł dotyczy realizacji ideii opracowania "inteligentnego sensora" estymującego obciążenie na podstawie odpowiedzi struktury mechanicznej. W opisanym przykładzie, realizowana sprzętowo sieć neuronowa została zastosowana do otrzymania przebiegu obciążenia na podstawie drgań określonych punktów struktury. Artykuł omawia także problemy związane z prototypowaniem i implementacja algorytmów przetwarzania sygnałów, ze szczególnym uwzględnieniem sytuacji, gdy część sprzętowa oparta jest na układach ASIC/FPGA, dla której opracowano metodologię implementacji, zweryfikowaną poprzez praktyczne zastosowanie do problemu inteligentnego sensora. Pokazano szczegóły tej procedury wraz z zastosowanymi narzędziami i wyniki osiągnięte w trakcie jej realizacji. Przeanalizowano wyniki działania urządzenia podczas eksperymentu i przedstawiono wnioski.
Źródło:
Journal of Theoretical and Applied Mechanics; 2002, 40, 3; 797-815
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of artificial neural networks to assessment of ship manoeuvrability qualities
Autorzy:
Abramowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/258896.pdf
Data publikacji:
2008
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
neural networks
ship manoeuvrability qualities
Opis:
This paper presents an attempt to applying neural networks for assessment of parameters of standard manoeuvrability tests, i.e. circulation test and zig-zag test. Methodological approach to application of neural networks as well as applied network structures and neuron activation functions are generally presented. Also, results of simulations performed by means of the elaborated networks are given in comparison with test cases selected at random. In order to analyze and reveal general trends, correlation relationships between results from network simulations and test cases were calculated and are presented as well.
Źródło:
Polish Maritime Research; 2008, 2; 15-21
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Discriminant Analysis and Neural Networks to Forecasting the Financial Standing of Farms
Wykorzystanie analizy dyskryminacyjnej oraz sieci neuronowych do prognozowania sytuacji finansowej gospodarstw rolniczych z uwzględnieniem czasu
Autorzy:
Kisielińska, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/905048.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
linear discriminant function
neural networks
Opis:
The aim of the research was to determinate a linear discriminant function and neural network that could be applied for financial situation forecasting in polish farms sector. The construction of discriminant models was based on set of financial indicators and the classification criterion was based on the private farm's income. The investigated population was divided into two equal groups with respect to the median value of income. The data was gathered in the period of several years that allowed examine the influence of the time on the quality of discriminant models. Also the set of indicators with large forecasting ability was determined. The data used for the discriminant models was sourced from private farms keeping farm accountancy under auspices the Institute of Agricultural and Food Economics in the years 1992-2002. The calculations was made with help of STATISTICA and data analysis with Excel using VISUAL BASIC FOR APPLICATION.
Celem prezentowanych badań było wyznaczenie liniowej funkcji dyskryminacyjnej oraz sieci neuronowej do tworzenia prognoz sytuacji finansowej gospodarstw rolniczych. Podstawę, konstrukcji modeli dyskryminacyjnych stanowił zestaw wskaźników finansowych, natomiast kryterium klasyfikacji oparte zostało na dochodzie rolniczym. Badaną zbiorowość podzielono na dwie równoliczne klasy. Gospodarstwa osiągające dochód rolniczy mniejszy od mediany (gospodarstwa słabe) zaliczano do klasy I, natomiast o dochodzie od niej większym (gospodarstw dobre) do II. Taki dobór kryterium klasyfikacji wynika z tego, że w przypadku gospodarstw rolniczych problem bankructwa praktycznie nie występuje, wobec czego nie można dla nuli budować typowych modeli ostrzegawczych. Analizy przeprowadzono na podstawie danych pochodzących z kilku lat, co pozwoliło im zbadanie wpływu czasu na jakość uzyskanych modeli dyskryminacyjnych. Chodziło o sprawdzenie, czy model zbudowany dla jednego roku można będzie wykorzystać w lalach kolejnych. Cel dodatkowy polegał na określeniu wskaźników finansowych o największych zdolnościach prognostycznych, czyli takich, których wpływ na wartość funkcji dyskryminacyjnej jest najistotniejszy. Modele dyskryminacyjne utworzono w oparciu o wyniki finansowe gospodarstw rolniczych prowadzących rachunkowość rolną pod kierunkiem Instytutu Ekonomiki Rolnictwa i Gospodarki Żywnościowej w latach 1992-2001. Do obliczeń wykorzystany został pakiet STATISTICA, natomiast obróbkę danych i analizę wyników wykonano w arkuszu kalkulacyjnym EXCEL wykorzystując język VISUAL BASIC FOR APPLICATION.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2009, 225
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diagnosis of malignant melanoma by neural network ensemble-based system utilising hand-crafted skin lesion features
Autorzy:
Grochowski, Michał
Mikołajczyk, Agnieszka
Kwasigroch, Arkadiusz
Powiązania:
https://bibliotekanauki.pl/articles/221391.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
decision support
diagnostics
image processing
artificial neural networks
ensemble of neural networks
melanoma malignant
Opis:
Malignant melanomas are the most deadly type of skin cancer, yet detected early have high chances of successful treatment. In the last twenty years, the interest in automatic recognition and classification of melanoma dynamically increased, partly because of appearing public datasets with dermatoscopic images of skin lesions. Automated computer-aided skin cancer detection in dermatoscopic images is a very challenging task due to uneven sizes of datasets, huge intra-class variation with small interclass variation, and the existence of many artifacts in the images. One of the most recognized methods of melanoma diagnosis is the ABCD method. In the paper, we propose an extended version of this method and an intelligent decision support system based on neural networks that uses its results in the form of hand-crafted features. Automatic determination of the skin features with the ABCD method is difficult due to the large diversity of images of various quality, the existence of hair, different markers and other obstacles. Therefore, it was necessary to apply advanced methods of pre-processing the images. The proposed system is an ensemble of ten neural networks working in parallel, and one network using their results to generate a final decision. This system structure enables to increase the efficiency of its operation by several percentage points compared with asingle neural network. The proposed system is trained on over 5000 and tested afterwards on 200 skin moles. The presented system can be used as a decision support system for primary care physicians, as a system capable of self-examination of the skin with a dermatoscope and also as an important tool to improve biopsy decision making.
Źródło:
Metrology and Measurement Systems; 2019, 26, 1; 65-80
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Using Assembler Encoding to build neuro-controllers for a team of autonomous underwater vehicles
Autorzy:
Praczyk, T.
Szymak, P.
Powiązania:
https://bibliotekanauki.pl/articles/206308.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
evolutionary neural networks
autonomous underwater vehicles
Opis:
The paper compares a neuro-evolutionary metod called Assembler Encoding with two other methods from the area of neuro–evolution. As a testbed for the methods a variant of the predator–prey problem with Autonomous Underwater Vehicles (AUV) operating in an environment with the sea current was used. In the experiments, the task of vehicles–predators controlled with evolutionary neural networks was to capture a vehicle–prey behaving according to a simple deterministic strategy. All the experiments were carried out in simulation, and in order to simplify calculations in the two–dimensional environment – AUVs moved on a horizontal surface under the water.
Źródło:
Control and Cybernetics; 2013, 42, 1; 267-286
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Signature recognition with a hybrid approach combining modular neural networks and fuzzy logic for response integration
Autorzy:
Beltrán, M.
Melin, P.
Trujillo, L.
Lopez, M.
Powiązania:
https://bibliotekanauki.pl/articles/384541.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
pattern recognition
neural networks
fuzzy logic
Opis:
This paper describes a modular neural network (MNN) with fuzzy integration for the problem of signature recognition. Currently, biometric identification has gained a great deal of research interest within the pattern recognition community. For instance, many attempts have been made in order to automate the process of identifying a person’s handwritten signature; however this problem has proven to be a very difficult task. In this work, we propose a MNN that has three separate modules, each using different image features as input, these are: edges, wavelet coefficients, and the Hough transform matrix. Then, the outputs from each of these modules are combined using a Sugeno fuzzy integral and a fuzzy inference system. The experimental results obtained using a database of 30 individual’s shows that the modular architecture can achieve a very high 99.33% recognition accuracy with a test set of 150 images. Therefore, we conclude that the proposed architecture provides a suitable platform to build a signature recognition system. Furthermore we consider the verification of signatures as false acceptance, false rejection and error recognition of the MNN.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2010, 4, 1; 20-27
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kohonen self-organizing maps for symbolic objects
Samoorganizujące się mapy Kohonena dla obiektów symbolicznych
Autorzy:
Dudek, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/907030.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
Classification
visualization
symbolic data
neural networks
Opis:
Visualizing data in the form of illustrative diagrams and searching, in these diagrams, for structures, clusters, trends, dependencies etc. is one of the main aims of multivariate statistical analysis. In the case of symbolic data (e.g. data in form of: single quantitative value, categorical values, intervals, multi-valued variables, multi-valued variables with weights), some well-known methods are provided by suitable 'symbolic' adaptations of classical methods such as principal component analysis or factor analysis. An alternative visualization of symbolic data is obtained by constructing a Kohonen map. Instead of displaying the individual items k = 1,..., n by n points or rectangles in a two dimensional space, the n items are first clustered into a number m of mini-clusters and then these mini-clusters are assigned to the vertices of a rectangular lattice of points in the plane such that 'similar' clusters are represented by neighbouring vertices in the lattice.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2008, 216
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Self-organizing neural network for modeling 3D QSAR of colchicinoids.
Autorzy:
Polański, Jarosław
Powiązania:
https://bibliotekanauki.pl/articles/1044388.pdf
Data publikacji:
2000
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
neural networks
3D QSAR
colchicinoids
Opis:
A novel scheme for modeling 3D QSAR has been developed. A method involving multiple self-organizing neural network adjusted to be analyzed by the PLS (partial least squares) analysis was used to model 3D QSAR of the selected colchicinoids. The model obtained allows the identification of some structural determinants of the biological activity of compounds.
Źródło:
Acta Biochimica Polonica; 2000, 47, 1; 37-45
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Database security : combining neural networks and classification approach
Autorzy:
Skaruz, Jarosław
Powiązania:
https://bibliotekanauki.pl/articles/1819254.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Przyrodniczo-Humanistyczny w Siedlcach
Tematy:
database
security
anomaly detection
neural networks
Opis:
In the paper we present a new approach based on application of neural networks to detect SQL attacks. SQL attacks are those attacks that take the advantage of using SQL statements to be performed. The problem of detection of this class of attacks is transformed to time series prediction problem. SQL queries are used as a source of events in a protected environment. To differentiate between normal SQL queries and those sent by an attacker, we divide SQL statements into tokens and pass them to our detection system, which predicts the next token, taking into account previously seen tokens. In the learning phase tokens are passed to a recurrent neural network (RNN) trained by backpropagation through time (BPTT) algorithm. Then, two coefficients of the rule are evaluated. The rule is used to interpret RNN output. In the testing phase RNN with the rule is examined against attacks and legal data to find out how evaluated rule affects efficiency of detecting attacks. All experiments were conducted on Jordan network. Experimental results show the relationship between the rule and a length of SQL queries.
Źródło:
Studia Informatica : systems and information technology; 2019, 1-2(23); 95--115
1731-2264
Pojawia się w:
Studia Informatica : systems and information technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigating the effects of i-complexity and e-complexity on the learnability of morphological systems
Autorzy:
Johnson, Tamar
Gao, Kexin
Smith, Kenny
Rabagliati, Hugh
Culbertson, Jennifer
Powiązania:
https://bibliotekanauki.pl/articles/2061409.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Instytut Podstaw Informatyki PAN
Tematy:
morphological
complexity
learning
neural networks
typology
Opis:
Research on cross-linguistic differences in morphological paradigms reveals a wide range of variation on many dimensions, including the number of categories expressed, the number of unique forms, and the number of inflectional classes. However, in an influential paper, Ackerman and Malouf (2013) argue that there is one dimension on which languages do not differ widely: in predictive structure. Predictive structure in a paradigm describes the extent to which forms predict each other, called i-complexity. Ackerman and Malouf (2013) show that although languages differ according to measure of surface paradigm complexity, called e-complexity, they tend to have low i-complexity. They conclude that morphological paradigms have evolved under a pressure for low i-complexity. Here, we evaluate the hypothesis that language learners are more sensitive to i-complexity than e-complexity by testing how well paradigms which differ on only these dimensions are learned. This could result in the typological findings Ackerman and Malouf (2013) report if even paradigms with very high e-complexity are relatively easy to learn, so long as they have low i-complexity. First, we summarize a recent work by Johnson et al. (2020) suggesting that both neural networks and human learners may actually be more sensitive to e-complexity than i-complexity. Then we build on this work, reporting a series of experiments which confirm that, indeed, across a range of paradigms that vary in either e- or icomplexity, neural networks (LSTMs) are sensitive to both, but show a larger effect of e-complexity (and other measures associated with size and diversity of forms). In human learners, we fail to find any effect of i-complexity on learning at all. Finally, we analyse a large number of randomly generated paradigms and show that e- and i-complexity are negatively correlated: paradigms with high e-complexity necessarily show low i-complexity. We discuss what these findings might mean for Ackerman and Malouf’s hypothesis, as well as the role of ease of learning versus generalization to novel forms in the evolution of paradigms.
Źródło:
Journal of Language Modelling; 2021, 9, 1; 97--150
2299-856X
2299-8470
Pojawia się w:
Journal of Language Modelling
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identification Accuracy of Additional Wave Resistance Through a Comparison of Multiple Regression and Artificial Neural Network Methods
Autorzy:
Cepowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/2065011.pdf
Data publikacji:
2018
Wydawca:
STE GROUP
Tematy:
identification
neural networks
regression
wave resistance
Opis:
The article presents the use of multiple regression method to identify added wave resistance. Added wave resistance was expressed in the form of a four-state nominal function of: “thrust”, “zero”, “minor” and “major” resistance values. Three regression models were developed for this purpose: a regression model with linear variables, nonlinear variables and a large number of nonlinear variables. The nonlinear models were developed using the author's algorithm based on heuristic techniques. The three models were compared with a model based on an artificial neural network. This study shows that non-linear equations developed through a multiple linear regression method using the author’s algorithm are relatively accurate, and in some respects, are more effective than artificial neural networks.
Źródło:
Multidisciplinary Aspects of Production Engineering; 2018, 1, 1; 197--204
2545-2827
Pojawia się w:
Multidisciplinary Aspects of Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ways of Selecting Internal Patterns in Multilayer Perceptron Network
Autorzy:
Kolibabka, M.
Cader, A.
Siwocha, A.
Krupski, M.
Powiązania:
https://bibliotekanauki.pl/articles/108637.pdf
Data publikacji:
2012
Wydawca:
Społeczna Akademia Nauk w Łodzi
Tematy:
neural networks
artificial intelligence
back propagation
Opis:
Creating and later learning one-way neural networks depends on many factors. Selecting many of them has estimated and experimental character. The suggested method is the Allows weakness of the influence of the not optimal choice of the net structure, also speed and momentum values are less influential in classic Back then Propagation Method. There are few modes of choosing elements to use in Followed algorithm.
Źródło:
Journal of Applied Computer Science Methods; 2012, 4 No. 1; 63-73
1689-9636
Pojawia się w:
Journal of Applied Computer Science Methods
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Classification of Trade Sector Entities in Credibility Assessment Using Neural Networks
Autorzy:
Wójcicka, Aleksandra
Powiązania:
https://bibliotekanauki.pl/articles/429810.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet w Białymstoku. Wydawnictwo Uniwersytetu w Białymstoku
Tematy:
credit risk
default
bankruptcy
neural networks
Opis:
One of the most valid tasks in credit risk evaluation is the proper classification of potential good and bad customers. Reduction of the number of loans granted to companies of questionable credibility can significantly influence banks’ performance. An important element in credit risk assessment is a prior identification of factors which affect companies’ standing. Since that standing has an impact on credibility and solvency of entities. The research presented in the paper has two main goals. The first is to identify the most important factors (chosen financial ratios) which determine company’s performance and consequently influence its credit risk level when granted financial resources. The question also arises whether the line of business has any impact on factors that should be included in the analysis as the input. The other aim was to compare the results of chosen neural networks with credit scoring system used in a bank during credit risk decision-making process.
Źródło:
Optimum. Economic Studies; 2017, 3(87)
1506-7637
Pojawia się w:
Optimum. Economic Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Smart control based on neural networks for multicellular converters
Autorzy:
Laidi, Kamel
Bouchhida, Ouahid
Nibouche, Mokhtar
Benmansour, Khelifa
Powiązania:
https://bibliotekanauki.pl/articles/1841217.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
multicellular converters
neural networks
smart control
Opis:
A smart control based on neural networks for multicellular converters has been developed and implemented. The approach is based on a behavioral description of the different converter operating modes. Each operating mode represents a well-defined configuration for which an operating zone satisfying given invariance conditions, depending on the capacitors’ voltages and the load current of the converter, is assigned. A control vector, whose components are the control signals to be applied to the converter switches is generated for each mode. Therefore, generating the control signals becomes a classification task of the different operating zones. For this purpose, a neural approach has been developed and implemented to control a 2-cell converter then extended to a 3-cell converter. The developed approach has been compared to super-twisting sliding mode algorithm. The obtained results demonstrate the approach effectiveness to provide an efficient and robust control of the load current and ensure the balancing of the capacitors voltages.
Źródło:
Archives of Electrical Engineering; 2021, 70, 3; 531-550
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Approach to classifying data with highly localized unmarked features using neural networks
Autorzy:
Grzeszczuk, Rafał
Powiązania:
https://bibliotekanauki.pl/articles/305688.pdf
Data publikacji:
2019
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
classification
neural networks
medical image analysis
Opis:
To face the increasing demand of quality healthcare, cutting-edge automation technology is being applied in demanding areas such as medical imaging. This paper proposes a novel approach to classification problems on datasets with sparse highly localized features. It is based on the use of a saliency map in the amplification of features. Unlike previous efforts, this approach does not use any prior information about feature localization. We present an experimental study based on the Diabetic Retinopathy classification problem, in which our method has shown to achieve an over 20%-higher accuracy in solving a two-class Diabetic Retinopathy classification problem than a naive approach based solely on residual neural networks. The dataset consists of 35,120 images of various qualities, inconsistent resolutions, and aspect ratios.
Źródło:
Computer Science; 2019, 20 (3); 329-342
1508-2806
2300-7036
Pojawia się w:
Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Organization of the evolutionary process responsible for creating neural networks in assembler encoding
Organizacja procesu ewolucyjnego w kodowaniu asemblerowym
Autorzy:
Praczyk, T.
Powiązania:
https://bibliotekanauki.pl/articles/210406.pdf
Data publikacji:
2009
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
ewolucyjne sieci neuronowe
evolutionary neural networks
Opis:
Assembler Encoding (AE) represents Artificial Neural Network (ANN) in the form of a simple program called Assembler Encoding Program (AEP). The task of AEP is to create the socalled Network Definition Matrix (NDM) including all the information necessary to construct ANN. AEPs and in consequence ANNs are formed by means of evolutionary techniques. To make AE an effective tool for creating ANNs it is necessary to appropriately organize all the evolutionary processes responsible for generating AEPs, i.e., it is necessary to properly select values of different parameters controlling the evolutionary process mentioned. To determine optimal conditions of the evolution in AE, experiments in a predator-prey problem were performed. The results of the experiments are presented at the end of the paper.
Kodowanie asemblerowe jest metodą wykorzystującą metody ewolucyjne do tworzenia sieci neuronowych. W kodowaniu asemblerowym sieci neuronowe ewoluują w wielu oddzielnych populacjach. Stworzenie pojedynczej sieci neuronowej wymaga połączenia elementów pochodzących z różnych populacji. Aby sieci neuronowe tworzone w ten sposób były wysokiej jakości konieczne jest odpowiednie sterowanie ewolucją w każdej populacji. Artykuł prezentuje wyniki badań, których głównym celem było określenie zasad prowadzenia ewolucji w Kodowaniu Asemblerowym.
Źródło:
Biuletyn Wojskowej Akademii Technicznej; 2009, 58, 2; 103-122
1234-5865
Pojawia się w:
Biuletyn Wojskowej Akademii Technicznej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Neural network with single hidden layer for air traffic volume prediction in uncontrolled airspace
Autorzy:
Paszyński, Piotr
Gnyś, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/23311606.pdf
Data publikacji:
2022
Wydawca:
Politechnika Gdańska
Tematy:
general aviation
uncontrolled airspace
neural networks
Opis:
This article presents a model enabling more efficient air traffic management achieved by better data use . Appropriate resource allocation is possible if it is based on a high quality air traffic volume forecast. The proposed approach is inspired by procedures used in flow management in air traffic control. Staff planning in controlled airspace is easier because almost all operations are communicated in the submitted flight plan. Short-term prediction of the number of operations in uncontrolled airspace is a much more challenging task. It is correlated with weather parameters and moreover, it naturally fluctuates throughout the day and the season. The relationship between General Aviation (GA) traffic volume and meteorological conditions were modeled using neural network. The obtained results confirm that it is possible to use the decision support system to plan the number of operational sectors. The described results open a scientific discussion about designing tools predicting air traffic volume in uncontrolled air space. The accuracy of the model can be improved by processing data from additional sources, but it is associated with a significant increase in the complexity of the solution.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2022, 26, 3
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Predicting emission spectra of fluorescent materials from their absorbance spectra using the artificial neural network
Autorzy:
Shams-Nateri, A
Piri, N
Powiązania:
https://bibliotekanauki.pl/articles/173176.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
fluorescence
prediction
absorbance
emission
neural networks
Opis:
Artificial neural networks have been shown to be able to approximate any continuous nonlinear functions and have been used to build data based empirical models for nonlinear processes. This work studies primarily the performance of neural networks as a tool for predicting the emission spectra of fluorescent materials from their absorbance, and further, tends to the determination of the optimal topology of the neural network for this purpose. In order to do this, spectral data were initially analyzed by a principal component analysis technique. The first four principal components were used as input nodes of neural networks with various training algorithms – namely cascade- and feed-forward algorithms – and also, various numbers of hidden layers and nodes. The obtained results indicate that the RMS error in a testing data set decreased with increasing the number of neurons and the minimal network architecture for a data prediction problem consists of two hidden layers, respectively with 9 and 1 nodes for both neural networks. Additionally, a better performance was obtained with the cascade-forward neural network, especially in a small number of nodes. The obtained results indicate that the neural networks can be used to provide a relationship between the absorbance as an input and the emission as a target.
Źródło:
Optica Applicata; 2015, 45, 4; 545-557
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Solar irradiance forecasting based on long-wave atmospheric radiation
Autorzy:
Piątek, M.
Trajer, J.
Czekalski, D.
Powiązania:
https://bibliotekanauki.pl/articles/298472.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
artificial neural networks
irradiance forecasting
cloudiness
Opis:
This work contains information concerning long-wave atmospheric radiation. Artificial neural networks were developed to forecast total mean hourly irradiance based on long-wave atmospheric radiation as cloudiness indicator. It was proved that using this variable in models for forecasting irradiance is wellgrounded. The proof was based on the neural networks sensitivity analysis. It was proved that neural network model is capable to utilize information carried by long wave atmospheric radiation only when the air temperature is provided as additional explanatory variable.
Źródło:
Technical Sciences / University of Warmia and Mazury in Olsztyn; 2015, 18(1); 27-36
1505-4675
2083-4527
Pojawia się w:
Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wavelet-neural systems as approximators of an unknown function - a comparison of biomedical signal classifiers
Autorzy:
Kostka, P.
Tkacz, E.
Powiązania:
https://bibliotekanauki.pl/articles/1965818.pdf
Data publikacji:
2004
Wydawca:
Politechnika Gdańska
Tematy:
wavelets
neural networks
biomedical signal classifiers
Opis:
Wavelet-neural systems (WNS) presented in this work, inheriting the properties of neural networks, belong to the class of universal approximators of unknown functions, F, describing the relationship between input X ∈ RN and output Y ∈ RM of a process or object. Classifier structures described in this work fulfil the role of approximators of functions, which are able to assign the input signal to a particular class with a given accuracy. A performance comparison of elaborated classifier structures with preliminary time-frequency analysis in the wavelet layer has been made for different types of the neural part. A feed forward multi-layer perceptron and a neural net with radial basic functions are analysed theoretically and practically. Results included in this paper present a comparison of the learning and verification stages of a classifier, tested on the basis of non-stationary signals of heart rate variability. Despite the fact that a WNS with the Morlet basic function gives the best results for the learning phase of WNS, the other tested wavelets used in the preliminary layer, Db4, allow us to obtain the best system performance during its verification.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2004, 8, 2; 159-169
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Neural algorithm of fixing the ships position
Autorzy:
Stateczny, A.
Wąż, M.
Powiązania:
https://bibliotekanauki.pl/articles/320962.pdf
Data publikacji:
2000
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
nawigacja
sieci neuronowe
navigation
neural networks
Opis:
Comparative methods of plotting the ship’s position based on the radar picture can be applied in coastal regions and narrow passages. The article presents the algorithm of comparative plotting of the ship’s position with the application of an artificial intelligence method – artificial neural networks. The results of numerical experiments have been adduced, conducted according to the method worked out.
Źródło:
Annual of Navigation; 2000, 2; 127-141
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Artificial neural networks for interpolation and identification of underwater object features
Autorzy:
Balicki, J.
Gloza, I.
Powiązania:
https://bibliotekanauki.pl/articles/332167.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Akustyczne
Tematy:
artificial neural networks
underwater object
hydroacoustic
Opis:
Artificial neural networks can be applied for interpolation of function with multiple variables. Because of concurrent processing of data by neurons, that approach can be seen as hopeful alternative for numerical algorithms. From these reasons, the analysis of capabilities for some models of neural networks has been carried out in the purpose for identification of the underwater object properties. Features of the underwater objects can be recognized by characteristics of a amplitude according to the frequency of measured signals. The feed-forward multi-layer networks with different transfer functions have been applied. Those network models have been trained by some versions of back-propagation algorithm as well as the Levenberg-Marquardt gradient optimization technique. Finally, for determination of the amplitude for the frequency of signal by the two-layer network with the hidden layer of the radial neurons has been proposed.
Źródło:
Hydroacoustics; 2008, 11; 1-10
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Implementacja sztucznych sieci neuronowych w środowisku LabVIEW
Artificial neural networks in LabVIEW
Autorzy:
Rafiński, L.
Powiązania:
https://bibliotekanauki.pl/articles/268930.pdf
Data publikacji:
2008
Wydawca:
Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
Tematy:
sztuczne sieci neuronowe
artificial neural networks
Opis:
Przedstawiono możliwości oraz strukturę zrealizowanego przez autora modułu do implementacji sztucznych sieci neuronowych w środowisku LabVIEW.
The article shows the structure and capabilities of a LabVIEW module for the artficial neural networks implementation designed by the author.
Źródło:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2008, 25; 141-143
1425-5766
2353-1290
Pojawia się w:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Using Artificial Neural Networks to Predict Stock Prices
Zastosowanie sztucznych sieci neuronowych do prognozowania cen papierów wartościowych
Autorzy:
Kozdraj, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/905061.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
neural networks
financial markets
financial forecasting
Opis:
Artificial neural networks constitute one of the most developed conception of artificial intelligence. They are based on pragmatic mathematical theories adopted to tasks resolution. A wide range of their applications also includes financial investments issues. The reason for NN's popularity is mainly connected with their ability to solve complex or not well recognized computational tasks, efficiency in finding solutions as well as the possibility of learning based on patterns or without them. They find applications particularly in forecasting stock prices on financial markets. The paper presents the problem of using artificial neural networks to predict stock prices on the example of the Warsaw Stock Exchange. It considers the general framework of neural networks, their potential and limitations as well as problems faced by researcher meets while using neural networks in prediction process.
Sztuczne sieci neuronowe stanowią jedną z najbardziej rozwiniętych gałęzi sztucznej inteligencji. Oparte są na pragmatycznych koncepcjach matematycznych dostosowywanych do rozwiązywanego zadania. Szeroki obszar zastosowań tych struktur obejmuje również zagadnienia szeroko rozumianych inwestycji finansowych. Przyczyn popularności należy upatrywać głównie w możliwości rozwiązywania skomplikowanych lub niezbyt dobrze rozpoznanych problemów obliczeniowych, sprawności znajdowania rozwiązań oraz możliwości uczenia się na podstawie wzorców lub bez nich. W szczególności sztuczne sieci neuronowe znajdują swoje zastosowanie w problemach predykcji cen papierów wartościowych na rynkach finansowych. Artykuł przedstawia problematykę zastosowania sieci neuronowych do prognozowania cen akcji na Giełdzie Papierów Wartościowych w Warszawie. Ukazuje ogólną koncepcję sieci neuronowych, ich możliwości, ograniczenia oraz problemy, jakie stają przed badaczem w momencie ich wykorzystania w procesie prognozowania.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2009, 225
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of multi-parameter data visualization by means of autoassociative neural networks to evaluate classification possibilities of various coal types
Autorzy:
Jamroz, D.
Powiązania:
https://bibliotekanauki.pl/articles/109902.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
autoassociative neural networks
coal types
multidimensional visualization
multi-parameter
identification of data
pattern recognition
neural networks
Opis:
The significance of data visualization in modern research is growing steadily. In mineral processing scientists have to face many problems with understanding data and finding essential variables from a large amount of data registered for material or process. Hence it is necessary to apply visualization of such data, especially when a set of data is multi-parameter and very complex. This paper puts forward a proposal to introduce the autoassociative neural networks for visualization of data concerning three various types of hard coal. Apart from theoretical discussion of the method, the empirical applications of the method are presented. The results revealed that it is a useful tool for a researcher facing a complicated set of data which allows for its proper classification. The optimal neural network parameters to successfully separate the analyzed three types of coal were found out for the analyzed example.
Źródło:
Physicochemical Problems of Mineral Processing; 2014, 50, 2; 719-734
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fuzzy inference neural networks with fuzzy parameters
Autorzy:
Rutkowska, D.
Hayashi, Y.
Powiązania:
https://bibliotekanauki.pl/articles/1931581.pdf
Data publikacji:
2003
Wydawca:
Politechnika Gdańska
Tematy:
neuro-fuzzy systems
fuzzy neural networks
fuzzy inference neural networks
fuzzy systems of type 2
fuzzy granulation
Opis:
This paper concerns fuzzy neural networks and fuzzy inference neural networks, which are two different approaches to neuro-fuzzy combinations. The former is a direct fuzzification of artificial neural networks by introducing fuzzy signals and fuzzy weights. The latter is a representation of fuzzy systems in the form of multi-layer connectionist networks, similar to neural networks. Parameters of membership functions (centers and widths) play the role of neural network weights. In this paper, fuzzy inference neural networks with fuzzy parameters are considered. Neuro-fuzzy systems of this kind utilize both approaches: fuzzy neural networks and fuzzy inference neural networks. They also pertain to fuzzy systems of type 2 since membership functions with fuzzy parameters characterize type 2 fuzzy sets. Various architectures of these networks have been obtained for fuzzy systems based on different fuzzy implications. By analogy with fuzzy inference neural networks with crisp parameters, methods of learning fuzzy parameters and rule generation can be derived for neuro-fuzzy systems with fuzzy parameters. Fuzzy inference neural networks are studied in the framework of fuzzy granulation. In particular, fuzzy clustering as fuzzy information granulation is proposed to be applied in order to generate fuzzy IF-THEN rules. Applications of fuzzy inference neural networks are also outlined.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2003, 7, 1; 7-22
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
SECURITY ASSESSMENT AND OPTIMIZATION OF ENERGY SUPPLY (NEURAL NETWORKS APPROACH)
Autorzy:
Jasiński, Tomasz
Ścianowska, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/488919.pdf
Data publikacji:
2015
Wydawca:
Instytut Badań Gospodarczych
Tematy:
energy supply
security
neural networks
operating reserve
Opis:
The question of energy supply continuity is essential from the perspective of the functioning of society and the economy today. The study describes modern methods of forecasting emergency situations using Artificial Intelligence (AI) tools, especially neural networks. It examines the structure of a properly functioning model in the areas of input data selection, network topology and learning algorithms, analyzes the functioning of an energy market built on the basis of a reserve market, and discusses the possibilities of economic optimization of such a model, including the question of safety.
Źródło:
Oeconomia Copernicana; 2015, 6, 2; 129-141
2083-1277
Pojawia się w:
Oeconomia Copernicana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Consumer-oriented heat consumption prediction
Autorzy:
Grzenda, M.
Powiązania:
https://bibliotekanauki.pl/articles/206248.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
district heating systems
demand prediction
neural networks
Opis:
The advent of modern low-cost monitoring and wireless transmission systems results in unprecedented availability of measurement data potentially available in near real-time mode. In particular, some of the remote meter reading systems can be used to collect data on an hourly or even sub-hourly basis. This allows the utility companies to model and predict consumer behaviour more precisely than before. In this study, the way the monitoring data can be used to model heat consumption at individual premises supplied with heat by a district heating system, is proposed. The proposed algorithm is based on customer partitioning used to devise a number of group models serving the needs of consumers sharing similar consumption profiles. Self-organising maps are used to group averaged long-term time series, while the short-term time series provide a basis for group prediction models. Particular attention has been paid to a wider hydraulic modelling perspective, as the application of the proposed method to provide assumed demand for hydraulic model of a district heating system is envisaged. The approach has been validated using a real data set. Results show that in spite of a limited number of monitored consumers, group prediction models, constructed using the algorithm proposed in this study, can significantly reduce demand prediction error.
Źródło:
Control and Cybernetics; 2012, 41, 1; 213-240
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł

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