Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "evolutionary" wg kryterium: Temat


Tytuł:
EA-MOSGWA : a tool for identifying associated SNPs in Genome Wide Association Studies
EA-MOSGWÀ : narzędzie do identyfikacji przyczynowych SNPów w badaniach asocjacyjnych całego genomu
Autorzy:
Gola, A.
Bogdan, M.
Frommlet, F.
Powiązania:
https://bibliotekanauki.pl/articles/375689.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
evolutionary algorithm
Genome Wide Association
linear regression
Opis:
This paper presents the current stage of the development of EA-MOSGWA - a tool for identifying causal genes in Genome Wide Association Studies (GWAS). The main goal of GWAS is to identify chromosomal regions which are associated with a particular disease (e.g. diabetes, cancer) or with some quantitative trait (e.g height or blood pressure). To this end hundreds of thousands of Single Nucleotide Polymorphisms (SNP) are genotyped. One is then interested to identify as many SNPs as possible which are associated with the trait in question, while at the same lime minimizing the number of false detections. The software package MOSGWA allows to detect SNPs via variable selection using the criterion mBIC2, a modified version of the Schwarz Bayesian Information Criterion. MOSGWA tries to minimize mBIC2 using some stepwise selection methods, whereas EA-MOSGWA applies some advanced evolutionary algorithms to achieve the same goal. We present results from an extensive simulation study where we compare the performance of EA-MOSGWA when using different parameter settings. We also consider using a clustering procedure to relax the multiple testing correction in mBlC2. Finally we compare results from EA-MOSGWA with the original stepwise search from MOSGWA, and show that the newly proposed algorithm has good properties in terms of minimizing the mBIC2 criterion, as well as in minimizing the misclassification rate of detected SNPs.
W artykule przedstawiony jest aktualny stan rozwoju programu EA-MOSGWA - narzędzia służącego do identyfikacji przyczynowych genów w badaniach asocjacyjnych całego genomu (ang. Genome Wide Association Studies, GWAS). Głównym celem tych badań jest określenie tych rejonów chromosomu, które są związane z występowaniem chorób genetycznych (np. cukrzyca, rak) lub wpływają na daną cechę (np. wysokość lub ciśnienie krwi). Sprowadzają się one do przebadania wielu tysięcy polimorfizmów pojedynczego nukleotydu (ang. Single Nucleotide Polymorphisme SNP) i powiązaniu ich (pojedynczych lub grupy SNPów) z przypadkami klinicznymi oraz możliwymi do zmierzenia cechami. Kluczową kwestią jest zidentyfikowanie jak największej liczby przyczynowych SNPów przy jednoczesnej minimalizacji fałszywych odkryć. Program MOSGWA umożliwia detekcje SNPów poprzez wybór zmiennych z użyciem kryterium mBIC2 - zmodyfikowanej wersji Bayesowskiego kryterium informacyjnego Schwarza. MOSGWA stara się zminimalizować mBIC2 przy pomocy metody selekcji Stepwise, podczas gdy EA-MOSGWA wykorzystuje w tym cclu zmodyfikowaną wersję algorytmu ewolucyjnego. W artykule prezentujemy wyniki szeroko zakrojonych badań symulacyjnych, w których możemy porównać wydajność EA-MOSGWA przy użyciu różnych ustawień parametrów. Również bierzemy pod uwagę klasteryzację SNPów, aby złagodzić korekcje wielokrotnego testowania w metodzie mBIC2. Przedstawiamy także porównanie wyników otrzymanych przez EA-MOSGWA z wynikami metody Stepsiwe używanej w programie MOSGWA, aby pokazać że proponowana metoda ma dobre właściwości minimalizacji kryterium mBIC2 oraz minimalizacji wskaźnika fałszywych detekcji.
Źródło:
Theoretical and Applied Informatics; 2013, 25, 3-4; 251-262
1896-5334
Pojawia się w:
Theoretical and Applied Informatics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy absorption by ferromagnetic nanoparticles in hyperthermia therapy
Autorzy:
Kurgan, E.
Powiązania:
https://bibliotekanauki.pl/articles/140857.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
evolutionary algorithm
parametric optimization
DC electric series motor
Opis:
A numerical method is developed for estimation of temperature distributions inside tissues heated by external RF hyperthermia with external circular coil. The computational method relies on a solution of electromagnetic field problem in sinusoidal steadyt state. The heat transfer problem is treated in three dimensions with axis symmetry model. Than the bioheat diffusion equation under a steady-state condition is solved to determine the temperature distributions inside tumour and surrounding tissues. The heat removal due to the blood circulation is also taken into account. Numerical results are presented for heat generated by ferromagnetic nanoparticles in order to minimize negative effects of radiofrequency radiation.
Źródło:
Archives of Electrical Engineering; 2012, 61, 4; 597-608
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interactive evolutionary multiobjective optimization driven by robust ordinal regression
Autorzy:
Branke, J.
Greco, S.
Słowiński, R.
Zielniewicz, P.
Powiązania:
https://bibliotekanauki.pl/articles/200702.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
evolutionary multiobjective optimization
interactive procedure
robust ordinal regression
Opis:
This paper presents the Necessary-preference-enhanced Evolutionary Multiobjective Optimizer (NEMO), which combines an evolutionary multiobjective optimization with robust ordinal regression within an interactive procedure. In the course of NEMO, the decision maker is asked to express preferences by simply comparing some pairs of solutions in the current population. The whole set of additive value functions compatible with this preference information is used within a properly modified version of the evolutionary multiobjective optimization technique NSGA-II in order to focus the search towards solutions satisfying the preferences of the decision maker. This allows to speed up convergence to the most preferred region of the Pareto-front.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2010, 58, 3; 347-358
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Artificial Immune System Approach for Smart Air-Conditioning Control
Autorzy:
Chaczko, Z.
Aslanzadeh, S.
Kuleff, J. A.
Powiązania:
https://bibliotekanauki.pl/articles/227264.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
artificial immune system
biologically inspired computing
evolutionary computation
Opis:
Biologically inspired computing that looks to nature and biology for inspiration is a revolutionary change to our thinking about solving complex computational problems. It looks into nature and biology for inspiration rather than conventional approaches. The Human Immune System with its complex structure and the capability of performing pattern recognition, self-learning, immune-memory, generation of diversity, noise tolerance, variability, distributed detection and optimisation - is one area that has been of strong interest and inspiration for the last decade. An air conditioning system is one example where immune principles can be applied. This paper describes new computational technique called Artificial Immune System that is based on immune principles and refined for solving engineering problems. The presented system solution applies AIS algorithms to monitor environmental variables in order to determine how best to reach the desired temperature, learn usage patterns and predict usage needs. The aim of this paper is to explore the AIS-based artificial intelligence approach and its impact on energy efficiency. It will examine, if AIS algorithms can be integrated within a Smart Air Conditioning System as well as analyse the impact of such a solution.
Źródło:
International Journal of Electronics and Telecommunications; 2012, 58, 2; 193-199
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phylogenetic and secondary RNA structure analysis of monogenean gill ectoparasites (Dactylogyrus spp.) parasitizing certain freshwater fishes
Autorzy:
Koyee, Q.M.K.
Abdullah, S.M.A.
Powiązania:
https://bibliotekanauki.pl/articles/2087415.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
evolutionary tree
secondary RNA structure
Dactylogyrus spp.
cyprinids
Iraq
Źródło:
Polish Journal of Veterinary Sciences; 2019, 4; 667-675
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Odporność gospodarki regionalnej i miejskiejna wstrząsy w świetle ewolucyjnej geografi i ekonomicznej
Regional and Urban Economic Resilience in the Light of Evolutionary Economic Geography
Autorzy:
Zakrzewska-Półtorak, Alicja
Powiązania:
https://bibliotekanauki.pl/articles/2028791.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Adaptability
evolutionary approach
regional economy
resilience
shock
urban
economy
Opis:
The paper focuses on the problem of the defi nition of regional and urban resilience, how to measure them, and how to evaluate the signifi cance of these categories in the regional studies. The analysis was carried out taking into account the structural and functional conditions of the regions and cities. In this article the author discusses the conditions and factors facilitating the strengthening of the adaptability of the regional economy and urban, with regard to the principles of evolutionary economic geography. The aim of the paper is to present the possibilities of application of the concept of regional and urban resilience to recent analyzes of regional development, with particular emphasis on evolutionary approach. The author applied the descriptive method and the comparative method. The analyzes are based on literature studies. Individualized study of social, economic and spatial structures of various spatial units, taking into account their resilience, can provide valuable information on the processes of adaptation of regions and cities and thus favorable conditions for their resistance, recovery, re-orientation and renewal.
Źródło:
Studia komitetu przestrzennego zagospodarowania kraju PAN; 2015, 164; 108-119
0079-3507
Pojawia się w:
Studia komitetu przestrzennego zagospodarowania kraju PAN
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spatial evolutionary games and radiation induced bystander effect
Autorzy:
Krześlak, M.
Świerniak, A.
Powiązania:
https://bibliotekanauki.pl/articles/229460.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
evolutionary games
bystander effect
biomathematical modelling
cellular automata
cancer
Opis:
We present an application of evolutionary game theory to modeling of some processes important from oncological point of view. A studied phenomenon is a radiation induced bystander effect, in which three different strategies (phenotypes) of cells take part. The proposed payoff table of fitness, related to environment adaptation and genetic cell behavior, contains costs/profits of bystander effect, choice of apoptotic pathway, producing growth factors and resistance against bystander effect. We consider a game theory model including spatial cells allocation (the game is played on lattice). We discuss also different polymorphic equilibrium points dependent on model parameters, types of spatial games and players distribution.
Źródło:
Archives of Control Sciences; 2011, 21, 2; 135-150
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
AH Method: a Novel Routine for Vicinity Examination of the Optimum Found with a Genetic Algorithm
Autorzy:
Piętak, Daniel Andrzej
Bilski, Piotr
Napiorkowski, Paweł Jan
Powiązania:
https://bibliotekanauki.pl/articles/2200688.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
heuristics
evolutionary computations
genetic algorithms
uncertainty estimation
parameter study
Opis:
The paper presents a novel heuristic procedure (further called the AH Method) to investigate function shape in the direct vicinity of the found optimum solution. The survey is conducted using only the space sampling collected during the optimization process with an evolutionary algorithm. For this purpose the finite model of point-set is considered. The statistical analysis of the sampling quality based upon the coverage of the points in question over the entire attraction region is exploited. The tolerance boundaries of the parameters are determined for the user-specified increase of the objective function value above the found minimum. The presented test-case data prove that the proposed approach is comparable to other optimum neighborhood examination algorithms. Also, the AH Method requires noticeably shorter computational time than its counterparts. This is achieved by a repeated, second use of points from optimization without additional objective function calls, as well as significant repository size reduction during preprocessing.
Źródło:
International Journal of Electronics and Telecommunications; 2022, 68, 4; 695--708
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stimulus with limited band optimization for analogue circuit testing
Autorzy:
Golonek, T.
Jantos, P.
Rutkowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/221641.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
analogue circuit testing
faults isolation
evolutionary computations
amplitude spectrum
Opis:
The paper presents an analogue circuit testing method that engages the analysis of the time response to a nonperiodic stimulus specialized for the verification of selected specifications. The decision about the current circuit diagnostic state depends on an amplitude spectrum decomposition of the time response measured during the test. A shape of the test excitation spectrum is optimized with the use of a differential evolution algorithm and it allows for achieving maximum fault coverage and the optimal conditions for fault isolation. Genotypes of the evolutionary system encode the amplitude spectrum of candidates for testing stimuli by means of rectangle frequency windows with amplitudes determined evolutionarily.
Źródło:
Metrology and Measurement Systems; 2012, 19, 1; 73-84
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evolutionary algorithms for global parametric fault diagnosis in analogue integrated circuits
Autorzy:
Jantos, P.
Grzechca, D.
Rutkowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/201078.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
analogue integrated circuits
fault diagnosis
localization
identification
evolutionary algorithms
Opis:
An evolutionary method for analogue integrated circuits diagnosis is presented in this paper. The method allows for global parametric faults localization at the prototype stage of life of an analogue integrated circuit. The presented method is based on the circuit under test response base and the advanced features classification. A classifier is built with the use of evolutionary algorithms, such as differential evolution and gene expression programming. As the proposed diagnosis method might be applied at the production phase there is a method for shortening the diagnosis time suggested. An evolutionary approach has been verified with the use of several exemplary circuits – an oscillator, a band-pass filter and two operational amplifiers. A comparison of the presented algorithm and two classical methods – the linear classifier and the nearest neighborhood method – proves that the heuristic approach allows for acquiring significantly better results.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2012, 60, 1; 133-142
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mining Pharmacy Database Using Evolutionary Genetic Algorithm
Autorzy:
Ykhlef, M.
ElGibreen, H.
Powiązania:
https://bibliotekanauki.pl/articles/226717.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
data mining
evolutionary algorithms
genetic algorithm
pharmacy database
sequential patterns
Opis:
Medication management is an important process in pharmacy field. Prescribing errors occur upstream in the process, and their effects can be perpetuated in subsequent steps. Prescription errors are an important issue for which conflicts with another prescribed medicine could cause severe harm for a patient. In addition, due to the shortage of pharmacists and to contain the cost of healthcare delivery, time is also an important issue. Former knowledge of prescriptions can reduce the errors, and discovery of such knowledge requires data mining techniques, such as Sequential Pattern. Moreover, Evolutionary Algorithms, such as Genetic Algorithm (GA), can find good rules in short time, thus it can be used to discover the Sequential Patterns in Pharmacy Database. In this paper GA is used to assess patient prescriptions based on former knowledge of series of prescriptions in order to extract sequenced patterns and predict unusual activities to reduce errors in timely manner.
Źródło:
International Journal of Electronics and Telecommunications; 2010, 56, 4; 427-432
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Comparative Analysis of Evolutionary Algorithms for Synthesis of Scanned Linear Array of Mutually Coupled Parallel Dipole Antennas
Autorzy:
Patidar, H.
Mahanti, G. K.
Muralidharan, R.
Powiązania:
https://bibliotekanauki.pl/articles/227212.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
antenna array
comparative analysis
evolutionary algorithms
inverse fast Fourier transform
scanning
Opis:
This paper presents a comparative analysis of three evolutionary algorithms, namely, Backtracking Search Algorithm, Cuckoo Search Algorithm and Artificial Bee Colony Algorithms for synthesis of a scanned linear array of uniformly spaced parallel half wavelength dipole antennas. Here, antenna parameters, namely Side Lobe Level, reflection coefficient and wide null depth are taken into consideration for comparison between algorithms. In addition to it, statistical parameters, namely best fitness value, mean and standard deviation of the fitness values obtained from algorithms are compared. Mutual coupling that exists among the antenna elements is included in obtaining radiation patterns and the self-impedances along with the mutual impedances are calculated by induced Electro-Motive Force method. Two different examples are shown in this paper to validate the effectiveness of the utilized approach. Although, this approach is applied to a linear array of dipole antennas; this can be utilized for other array geometries as well.
Źródło:
International Journal of Electronics and Telecommunications; 2017, 63, 2; 151-157
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
GPU-based tuning of quantum-inspired genetic algorithm for a combinatorial optimization problem
Autorzy:
Nowotniak, R.
Kucharski, J.
Powiązania:
https://bibliotekanauki.pl/articles/201268.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
quantum-inspired genetic algorithm
evolutionary computing
meta-optimization
parallel algorithms
GPGPU
Opis:
This paper concerns efficient parameters tuning (meta-optimization) of a state-of-the-art metaheuristic, Quantum-Inspired Genetic Algorithm (QIGA), in a GPU-based massively parallel computing environment (NVidia CUDATMtechnology). A novel approach to parallel implementation of the algorithm has been presented. In a block of threads, each thread transforms a separate quantum individual or different quantum gene; In each block, a separate experiment with different population is conducted. The computations have been distributed to eight GPU devices, and over 400× speedup has been gained in comparison to Intel Core i7 2.93GHz CPU. This approach allows efficient meta-optimization of the algorithm parameters. Two criteria for the meta-optimization of the rotation angles in quantum genes state space have been considered. Performance comparison has been performed on combinatorial optimization (knapsack problem), and it has been presented that the tuned algorithm is superior to Simple Genetic Algorithm and to original QIGA algorithm.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2012, 60, 2; 323-330
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multiobjective shape optimization of selected coupled problems by means of evolutionary algorithms
Autorzy:
Długosz, A.
Burczyński, T.
Powiązania:
https://bibliotekanauki.pl/articles/202348.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
multiobjective optimization
evolutionary algorithms
multiphysics
coupled field problems
finite element method
Opis:
In present paper an improved multi-objective evolutionary algorithm is used for Pareto optimization of selected coupled problems. Coupling of mechanical, electrical and thermal fields is considered. Boundary-value problems of the thermo-elasticity, piezoelectricity and electro-thermo-elasticity are solved by means of finite element method (FEM). Ansys Multiphysics and MSC.Mentat/Marc software are used to solve considered coupled problems. Suitable interfaces between optimization tool and the FEM software are created. Different types of functionals are formulated on the basis of results obtained from the coupled field analysis. Functionals depending on the area or volume of the structure are also proposed. Parametric curves NURBS are used to model some optimized structures. Numerical examples for exemplary three-objective optimization are presented in the paper.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2012, 60, 2; 215-222
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optymalizacja strukturalna dla architektów
Structural optimisation for architects
Autorzy:
Pasternak, A.
Powiązania:
https://bibliotekanauki.pl/articles/1366543.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
optymalizacja strukturalna
algorytm genetyczny
architektura ewolucyjna
structural optimisation
genetic algorithm
evolutionary architecture
Opis:
Poprzez porównanie etapów procesu projektowego w dziedzinie projektowania architektonicznego i projektowania samolotów, zwracając uwagę na sposób obsługi danych i integracji technik, uwidocznione zostały duże różnice w zakresie automatyzacji pewnych procesów projektowych. W projektowaniu architektonicznym, operowanie w takim środowisku, w którym możliwe jest tworzenie modeli parametrycznych, które w swojej logice mają zaprogramowane wytyczne, np. konstrukcyjne, umożliwi projektowanie budynków, których układ strukturalny i funkcjonalny są ze sobą lepiej zintegrowane i zoptymalizowane.
A comparison of the phases of the design process in the field of architectural design and aircraft design, with particular consideration of the differences in data handling and technique integration, has shown large differences in the automation of certain design processes. In the field of architectural design, operating in an environment where it is possible to create parametric models in which logic guidelines such as construction guidelines are programmed, will allow designing buildings whose structural and functional layout are better integrated and optimized.
Źródło:
Kwartalnik Architektury i Urbanistyki; 2014, 59, 2; 63-66
0023-5865
Pojawia się w:
Kwartalnik Architektury i Urbanistyki
Dostawca treści:
Biblioteka Nauki
Artykuł

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies