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Wyszukujesz frazę "Information theory" wg kryterium: Temat


Tytuł:
Self-learning scoring models – introduction of an on-line approach to risk assesment
Autorzy:
Kozera, R.
Koziol, P
Powiązania:
https://bibliotekanauki.pl/articles/102506.pdf
Data publikacji:
2014
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
risk management
scoring model
information theory
Opis:
The problem considered in this article involves the construction of evaluation model, which could subsequently be used in the field of modeling and risk management. The research work is finalized by a construction of a new model on the basis of observations of the models used for risk management and knowledge of information theory, machine learning and artificial neural networks. The developed tools are trained online, using their ability for automatic deduction rules based on data, during model application for evaluation tasks. The model, consequently changes the data analysis stage, limits the scope of the necessary expertise in the area, where the assessment model can be used and, to some extent, the shape of the model becomes independent from the current range of available data. These features increase its ability to generalize and to cope with the data of previously undefined classes, as well as improve its resistance to gaps occurring in the data. Performance of the model presented in this paper is tested and verified on the basis of real-life data, which would resemble a potentially real practical application. Preliminary tests performed within the scope of this work indicate that the developed model can form a starting point for further research as some of the used mechanisms have a fairly high efficiency and flexibility.
Źródło:
Advances in Science and Technology. Research Journal; 2014, 8, 22; 42-50
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Single particle spectra from information theory point of view
Autorzy:
Navarra, F.
Utyuzh, O.
Wilk, G.
Włodarczyk, Z.
Powiązania:
https://bibliotekanauki.pl/articles/147370.pdf
Data publikacji:
2004
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
information theory
high energy collisions
MaxEnt
Opis:
Abstract It is demonstrated how to obtain the least biased description of a single particle spectra measured in all multiparticle production processes by using an information theory approach (known also as MaxEnt approach). The case of e+e annihilation in hadrons process is discussed in more detail as an example. Comparison between the MaxEnt approach and a simple dynamical model based on the cascade process is presented as well.
Źródło:
Nukleonika; 2004, 49,suppl.2; 19-21l
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Die Geschichtlich Strukturierte Zeit in der Informationstheorie
Historical structure of time in information theory
Autorzy:
Drożdż, Michał
Powiązania:
https://bibliotekanauki.pl/articles/942946.pdf
Data publikacji:
2005
Wydawca:
Copernicus Center Press
Tematy:
information theory
structures
time
Carl von Weizsäcker
Opis:
Carl von Weizsäcker analyzes the information concept in the framework of his own philosophy. He emphasizes, on the one hand, the irreversibility inherent in the time structure and, on the other hand, the dependence of information on temporal relations. In his view, information constitutes an abstract, albeit real, element of the world related to the form, structure, and order. Its quantitative and dynamical character assimilates it to matter and energy. Information does not exist outside material processes and human consciousness. Its dynamical aspect is strictly connected with communication, and evolutionary and entropic processes. In Weizsäcker's view, information becomes a philosophical concept. His approach hardly could be regarded as a full theory of time and information; it is rather an attempt at grasping their mutual dependencies and meaning.
Źródło:
Zagadnienia Filozoficzne w Nauce; 2005, 37; 140-163
0867-8286
2451-0602
Pojawia się w:
Zagadnienia Filozoficzne w Nauce
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CMIM-2: An Enhanced Conditional Mutual Information Maximization Criterion for Feature Selection
Autorzy:
Vergara, J. R.
Estévez, P. A.
Powiązania:
https://bibliotekanauki.pl/articles/108783.pdf
Data publikacji:
2010
Wydawca:
Społeczna Akademia Nauk w Łodzi
Tematy:
feature selection
conditional mutual information
information theory
relevance
redundancy
Opis:
A new greedy feature selection criterion is proposed as an enhancement of the conditional mutual information maximization criterion (CMIM). The new criterion, called CMIM-2, allows detecting relevant features that are complementary in the class prediction better than the original criterion. In addition, we present a methodology to approximate the conditional mutual information to spaces of three variables, avoiding its estimation in high-dimensional spaces. Experimental results for artificial and UCI benchmark datasets show that the proposed criterion outperforms the original CMIM criterion.
Źródło:
Journal of Applied Computer Science Methods; 2010, 2 No. 1; 5-20
1689-9636
Pojawia się w:
Journal of Applied Computer Science Methods
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of groundwater quality monitoring network using information theory and simulated annealing algorithm
Autorzy:
Treichel, W.
Kucharek, M.
Powiązania:
https://bibliotekanauki.pl/articles/2063028.pdf
Data publikacji:
2010
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
simulated annealing
monitoring network
information theory
optimization
entropy
Opis:
In this paper a methodology of assessment and optimization of groundwater quality monitoring network which takes into account the evaluation criteria derived from the Shannon information theory is presented. The fundamental criteria derived from this theory are: (1) the value of marginal information entropy, which is a measure of the amount of information containing in the data in a location of sampling point, and (2) the value of transinformation (mutual information) which measures the amount of information shared between each of two sampling points. Transinformation can be interpreted as an index of the stochastic dependence between the random variables corresponding to groundwater quality data recorded in different sampling points of monitoring network and shows the reduction of uncertainty included in one variable due to the knowledge of the other variable. In the optimization problem the objective function involving the value of transinformation of the investigated water quality parameters (Cl, Cu, Na) is minimized. To minimize the objective function the simulated annealing algorithm, which allows to find a satisfactory sub-optimal solution, was used. The proposed methodology was applied to optimize the groundwater monitoring network of contaminant reservoir Żelazny Most, one of the worlds biggest industrial waste disposal site, which collects post-flotation contaminants originating from copper ore treatment. The results show an increase in the effectiveness of the monitoring network by reducing the number of sampling points while maintaining an acceptable amount of information available in the network.
Źródło:
Biuletyn Państwowego Instytutu Geologicznego; 2010, 441 Hydrogeologia z. 10; 193--199
0867-6143
Pojawia się w:
Biuletyn Państwowego Instytutu Geologicznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Video Transmission Using Network Coding
Autorzy:
Asís López-Fuentes de, F.
Cabrera-Medina, C.
Powiązania:
https://bibliotekanauki.pl/articles/308479.pdf
Data publikacji:
2012
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
communication networks
information theory
network coding video streaming
Opis:
Network coding is a new technique in the field of information theory and coding theory. This emerging technique offers great benefits in the communication networks such as increased throughput and energy savings. In this paper, we evaluate network coding for video transmission scenarios. In these scenarios, the source nodes encode the video packets, while the intermediate nodes implement network coding before forwarding the encoded packets to the end nodes. Finally, the end nodes decode the received packets in order to recovery the original video. H.264/MPEG-4 AVC is used as the video compression standard in this work. We have used the network simulator (NS-2) for our simulations. Our results show that network coding improves the system throughput, reduces the packet loss and improves the video quality in the end nodes.
Źródło:
Journal of Telecommunications and Information Technology; 2012, 1; 50-57
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uplift Modeling in Direct Marketing
Autorzy:
Rzepakowski, P.
Jaroszewicz, S.
Powiązania:
https://bibliotekanauki.pl/articles/309211.pdf
Data publikacji:
2012
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
decision trees
information theory
marketing tools
uplift modeling
Opis:
Marketing campaigns directed to randomly selected customers often generate huge costs and a weak response. Moreover, such campaigns tend to unnecessarily annoy customers and make them less likely to answer to future communications. Precise targeting of marketing actions can potentially results in a greater return on investment. Usually, response models are used to select good targets. They aim at achieving high prediction accuracy for the probability of purchase based on a sample of customers, to whom a pilot campaign has been sent. However, to separate the impact of the action from other stimuli and spontaneous purchases we should model not the response probabilities themselves, but instead, the change in those probabilities caused by the action. The problem of predicting this change is known as uplift modeling, differential response analysis, or true lift modeling. In this work, tree-based classifiers designed for uplift modeling are applied to real marketing data and compared with traditional response models, and other uplift modeling techniques described in literature. The experiments show that the proposed approaches outperform existing uplift modeling algorithms and demonstrate significant advantages of uplift modeling over traditional, response based targeting.
Źródło:
Journal of Telecommunications and Information Technology; 2012, 2; 43-50
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Semantic Sparse Representation of Disease Patterns
Autorzy:
Przelaskowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/226810.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
sparse representation
compressive sensing
information theory
semantic information
disease pattern
Opis:
Sparse data representation is discussed in a context of useful fundamentals led to semantic content description and extraction of information. Disease patterns as semantic information extracted from medical images were underlined because of discussed application of computer-aided diagnosis. Compressive sensing rules were adjusted to the requirements of diagnostic pattern recognition. Proposed methodology of sparse disease patterns considers accuracy of sparse representation to estimate target content for detailed analysis. Semantics of sparse representation were modeled by morphological content analysis. Subtle or hidden components were extracted and displayed to increase information completeness. Usefulness of sparsity was verified for computer-aided diagnosis of stroke based on brain CT scans. Implemented method was based on selective and sparse representation of subtle hypodensity to improve diagnosis. Visual expression of disease signatures was fixed to radiologist requirements, domain knowledge and experimental analysis issues. Diagnosis assistance suitability was proven by experimental subjective rating and automatic recognition.
Źródło:
International Journal of Electronics and Telecommunications; 2010, 56, 3; 273-280
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation of information entropy based on its visualization
Autorzy:
Cholewa, M.
Palys, M.
Powiązania:
https://bibliotekanauki.pl/articles/333282.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:
Shannon's entropy
information theory
visualization
entropia Shannona
teoria informacji
wizualizacja
Opis:
This paper describes the method which allows an estimation of information entropy in the meaning of Shannon. The method is suitable to an estimation which sample has a higher value of information entropy. Several algorithms have been used to estimate entropy, assuming that they do it faster. Each algorithm has calculated this value for several text samples. Then analysis has verified which comparisons of the two samples were correct. It has been found that the probabilistic algorithm is the fastest and most effective in returning the estimated value of entropy.
Źródło:
Journal of Medical Informatics & Technologies; 2017, 26; 18-25
1642-6037
Pojawia się w:
Journal of Medical Informatics & Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The readability model for natural and artificial languages
Autorzy:
Cholewa, M.
Powiązania:
https://bibliotekanauki.pl/articles/333781.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:
typography
information theory
programming language
typografia
teoria informacji
język programowania
Opis:
This paper describes the model which allows an estimation of the readability factor of texts written in natural language or programs coded in syntax of programming languages. Only font styles are considered in this model. The destination of the model is improving readability. It can get though change font style. Several samples of text written in natural language have been used to estimation of the readability factor. Then these factors for given texts have been increased or reduced though intentional change font style. Studies have shown that deliberately changing the font style has a visible effect on improving readability or significantly lowering it.
Źródło:
Journal of Medical Informatics & Technologies; 2018, 27; 21-28
1642-6037
Pojawia się w:
Journal of Medical Informatics & Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uwolnić informację!
Autorzy:
Pacek, Jarosław
Powiązania:
https://bibliotekanauki.pl/articles/681311.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
Informacja
Teoria informacji
Użytkownicy informacji
Nauka
Informacja naukowa
Information
Information theory
Information users
Science
Scientific information
Źródło:
Folia Bibliologica; 2009, 51; 7-24
2449-8246
1230-2376
Pojawia się w:
Folia Bibliologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heart rate variability based assessment of cognitive workload in smart operators
Autorzy:
Digiesi, Salvatore
Manghisi, Vito M.
Facchini, Francesco
Klose, Elisa M.
Foglia, Mario M.
Mummolo, Carlotta
Powiązania:
https://bibliotekanauki.pl/articles/406972.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
smart operators
cognitive load
NASA-TLX
heart rate variability
information theory model
Opis:
The study on cognitive workload is a field of research of high interest in the digital society. The implementation of ‘Industry 4.0’ paradigm asks the smart operators in the digital factory to accomplish more ‘cognitive-oriented’ than ‘physical-oriented’ tasks. The Authors propose an analytical model in the information theory framework to estimate the cognitive workload of operators. In the model, subjective and physiological measures are adopted to measure the work load. The former refers to NASA-TLX test expressing subjective perceived work load. The latter adopts Heart Rate Variability (HRV) of individuals as an objective indirect measure of the work load. Subjective and physiological measures have been obtained by experiments on a sample subjects. Subjects were asked to accomplish standardized tasks with different cognitive loads according to the ‘n-back’ test procedure defined in literature. Results obtained showed potentialities and limits of the analytical model proposed as well as of the experimental subjective and physiological measures adopted. Research findings pave the way for future developments.
Źródło:
Management and Production Engineering Review; 2020, 11, 3; 56-64
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zawartość informacyjna wyników kontrolowanych pomiarów głębokości
Information content estimation of audited results for depth measurement
Autorzy:
Kołaczyński, S.
Powiązania:
https://bibliotekanauki.pl/articles/222262.pdf
Data publikacji:
2013
Wydawca:
Akademia Marynarki Wojennej. Wydział Dowodzenia i Operacji Morskich
Tematy:
teoria informacji
opracowanie wyników pomiarów
zawartość informacyjna
information theory
development of measurement results
information content
Opis:
W artykule przedstawiono próbę oceny zawartości informacyjnej wyników wyrównania danych pomiarowych na przecinających się halsach, na których pozycje okrętu zostały wyznaczone z dużą dokładnością. Na bazie wybranej metody wyrównania oraz definicji ilości informacji oceniono zawartość informacyjną wyrównywanego wyniku.
This article contains the first attempt of the information content estimation of the crossing observations errors adjustment. On the base of adjustment methods and definitions of the information theory, estimation of the information content of the adjusted result is given.
Źródło:
Zeszyty Naukowe Akademii Marynarki Wojennej; 2013, R. 54 nr 2 (193), 2 (193); 49-56
0860-889X
Pojawia się w:
Zeszyty Naukowe Akademii Marynarki Wojennej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Applying the concept of figural goodness for automatic design of dataset visualization
Zastosowanie koncepcji „figural goodness” do automatycznego projektowania wizualizacji zbioru danych
Autorzy:
Rzeźniczak, T.
Powiązania:
https://bibliotekanauki.pl/articles/306000.pdf
Data publikacji:
2013
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
data visualization
graphical languages
structural information theory
figural goodness
wizualizacja danych
języki graficzne
Opis:
Many approaches to automatic design of graphical presentation are focused on creating graphical presentation for a given data type, often without considering actual instances of data. This is due to the fact that they aim to be general purpose solutions. In this study a method which draws attention to characteristics of the actual data to be presented is adopted. Knowing characteristics of data that will be shown to the observer in advance, allows much more customized approach and better performance of constructed visualization. Visualisation performance in this case is understood as an ability to identify and recognize presented objects quickly and easily. Construction of the method relies heavily on research in the area of data visualization and perceptual psychology - with special emphasis on figural goodness.
Wiele rozwiązań z zakresu automatyzacji konstruowania prezentacji graficznych koncentruje się na konstruowaniu prezentacji graficznych dla wybranego typu danych, najczęściej bez uwzględniania konkretnej instancji danych w procesie przygotowania metody prezentacji. Wynika to z faktu, że podejścia te starają się być rozwiązaniami uniwersalnymi. W pracy zaproponowana jest metoda, która zwraca uwagę na cechy danych, które faktycznie będą przedstawiane. Znając charakterystykę danych, do zaprezentowania możliwe jest znacznie lepsze dostosowanie podejścia i poprawa wydajności zbudowanej wizualizacji. Wydajność wizualizacji w tym przypadku jest rozumiana jako zdolność obserwatora do odnajdywania i rozpoznawania prezentowanych obiektów w szybki i łatwy sposób. Budowa metody opiera się głównie na badaniach w obszarze wizualizacji danych i psychologii percepcji - ze szczególnym naciskiem na figural goodness.
Źródło:
Biuletyn Instytutu Systemów Informatycznych; 2013, 11; 23-31
1508-4183
Pojawia się w:
Biuletyn Instytutu Systemów Informatycznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
O genezie informacji
On the Genesis of Information
Autorzy:
Lubański, Mieczysław
Powiązania:
https://bibliotekanauki.pl/articles/2015877.pdf
Data publikacji:
2002
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
Tematy:
informacja
informacja intelektualna
informacja biologiczna
informacja cybernetyczna
informacja kosmiczna
teoria informacji
infon
information
intellectual information
biological information
cybernetic information
cosmic information
information theory
Opis:
In our limes there are distinguished several kinds of information, among them the following should be listed:1) intellectual information − which is generated in human brain and oriented towards social use,2) biological and cybernetic information − which is carried by specific signals and received by living organisms or technical devices,3) cosmic information − which, as a fundamental element, together with mass and energy, constitues reality; an elementary unit of this kind of information is named an infon. The following axioms are accepted:a) An infon is a photon with an infinite wave-length.b) A photon is an infon moving with the light speed.c) When this velocity differs from the light speed, an energy quantum transforms into an information quantum, i.e. into an infon.4) Owing to gathered data we can expect „information” to evolve towards becoming aphilosophical category because it begins to function as „a medium of understanding” when philosophical problems are taken into consideration and worked-out.
Źródło:
Roczniki Filozoficzne; 2002, 50, 3; 143-162
0035-7685
Pojawia się w:
Roczniki Filozoficzne
Dostawca treści:
Biblioteka Nauki
Artykuł

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