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Wyszukujesz frazę "pattern analysis" wg kryterium: Temat


Tytuł:
Detection of human eye components on the basis of multispectral imaging
Autorzy:
Michalak, M.
Nurzyńska, K.
Świtoński, A.
Powiązania:
https://bibliotekanauki.pl/articles/333415.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:
rozpoznawanie wzorców
analiza wielospektralna
przetwarzanie obrazów
segmentacja obrazu
pattern recognition
multispectral analysis
image processing
image segmentation
Opis:
In this paper the methods for selecting of the most important parts of the human eyes are described. On the basis of the real 21 channel multispectral images the model of finding the lens and the spot are defined. These methods are based on the most popular algorithms of image processing. The approach to veins detection is still undefined but in the article the most important channels are pointed out and the channel difference between eyelash and the veins is also mentioned.
Źródło:
Journal of Medical Informatics & Technologies; 2012, 19; 41-47
1642-6037
Pojawia się w:
Journal of Medical Informatics & Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of contact pattern for double enveloping worm gear
Autorzy:
Połowniak, Piotr
Sobolak, Mariusz
Marciniec, Adam
Powiązania:
https://bibliotekanauki.pl/articles/1831346.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
globoid worm gear
contact pattern
CAD environment
tooth contact analysis
meshing simulation
globoidalna przekładnia ślimakowa
ślad styku
środowisko CAD
analiza styku zębów
symulacja zazębienia
Opis:
The paper presents the method of determining geometric contact pattern by using the direct computer-aided design (CAD) method for ideal globoid worm gear in which mounting deviations are considered. The tooth contact analysis was performed for all cycle of worm rotation. Based on the results of temporary contact pattern, graphical characteristics of the contact area size depending on worm position were made. A complete analysis of the correctness of gear meshing can be obtained based on presented method. If the worm or worm wheel is incorrectly designed in terms of the geometry, the meshing simulation of CAD models can indicate the collision. Geometric contact pattern analyses were made at two pressure angles of ideal gear. The analysis of the influence of mounting deviations was done against one selected pressure angle and one gear position.
Źródło:
Advances in Manufacturing Science and Technology; 2020, 44, 4; 145-154
0137-4478
Pojawia się w:
Advances in Manufacturing Science and Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diagnostics of Synchronous Motor Based on Analysis of Acoustic Signals with the use of Line Spectral Frequencies and K-nearest Neighbor Classifier
Autorzy:
Glowacz, A.
Powiązania:
https://bibliotekanauki.pl/articles/176610.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
acoustic signal
pattern analysis
synchronous motor
diagnostics
Opis:
In industrial processes electrical motors are serviced after a specific number of hours, even if there is a need for service. This led to the development of early fault diagnostic methods. Paper presents early fault diagnostic method of synchronous motor. This method uses acoustic signals generated by synchronous motor. Plan of study of acoustic signal of synchronous motor was proposed. Two conditions of synchronous motor were analyzed. Studies were carried out for methods of data processing: Line Spectral Frequencies and K-Nearest Neighbor classifier with Minkowski distance. Condition monitoring is useful to protect electric motors and mining equipment. In the future, these studies can be used in other electrical devices.
Źródło:
Archives of Acoustics; 2014, 39, 2; 189-194
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Disparities in the level of regional technical infrastructure development in Poland: multicriteria analysis
Autorzy:
Miłek, Dorota
Powiązania:
https://bibliotekanauki.pl/articles/22443135.pdf
Data publikacji:
2022
Wydawca:
Instytut Badań Gospodarczych
Tematy:
regional infrastructure
regional disparities
Poland’s voivodeships
taxonomic analysis
multicriteria analysis
Hellwig development pattern method
Opis:
Research background: The development policy currently promoted by the European Union is focused on the use of the territory?s internal resources. Among the factors affecting regional development, by building its potential, infrastructure, being a basic necessity for developing activity in a given area, is of significant importance. Hence, investment in infrastructure is critical to stimulating economic dynamism, as it is the basis for supporting a variety of measures aimed at economic growth. Purpose of the article: This paper aims to evaluate the level of development of technical infrastructure and changes taking place in this field in Polish voivodeships in 2008 and 2020. Methods: The study was carried out using the Hellwig development pattern method and a comparative analysis of the technical infrastructure of Polish regions. The above approach makes it possible to measure the diversity of the state and availability of infrastructure for the communities of the regions. Findings & value added: While implementing the study aim, particular attention was paid to the spatial differences in the level of development of the technical infrastructure of Polish voivodeships. The analysis enabled to distinguish groups of voivodeships with the highest, high, low, and very low level of technical infrastructure development. From a long-term perspective, the conducted research can be seen as a contribution to existing research and serve to further compare the impact of technical infrastructure on the economic development of countries. The strength of the study is the adequately long time span of the analysis (2008 ? the period of the financial crisis and 2020 ? the COVID 2019 pandemic), which provides a basis for the formation of the infrastructure in question. The added value of the article is also a regional perspective on the level of development of technical infrastructure using multidimensional methods of statistical analysis. The results of the study can be used to make decisions at the national level regarding the retrofitting of infrastructure in regions with a low level of infrastructure development. For the European Union's decision-makers they can be a source of knowledge of where to direct EU funds the purpose of which is the infrastructural development of regions.
Źródło:
Equilibrium. Quarterly Journal of Economics and Economic Policy; 2022, 17, 4; 1087-1113
1689-765X
2353-3293
Pojawia się w:
Equilibrium. Quarterly Journal of Economics and Economic Policy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Don’t fight the tape! Technical Analysis Momentum and Contrarian Signals as Common Cognitive Biases
Autorzy:
Zielonka, Piotr
Białaszek, Wojciech
Biedrzycki, Paweł
Dzik, Bartłomiej
Powiązania:
https://bibliotekanauki.pl/articles/1933544.pdf
Data publikacji:
2020-02
Wydawca:
Akademia Leona Koźmińskiego w Warszawie
Tematy:
technical analysis
pattern recognition
cognitive biases
momentum
contrarian
Opis:
Purpose: Stock market participants use technical analysis to seek trends in stock price charts despite its doubtful efficiency. We tested whether technical analysis signals represent typical and common cognitive biases associated with the continuation or reversal of the trend. Methodology: We compared investors’ opinions about the predictive power of technical analysis signals grouped into five conditions: real technical analysis signals associated with trend continuation (real momentum signals) or trend reversal (real contrarian signals), fake momentum or fake contrarian signals, and fluctuation signals. Findings: Investors assigned larger predictive power to real and fake signals associated with trend continuation than to signals associated with trend reversal. Fake signals, which represented cognitive biases, elicited similar predictions about trend continuation or reversal to real technical analysis signals. Originality: Market players assess momentum signals to have greater predictive power than contrarian signals and neutral signals to have the least predictive power. These results are independent of whether technical analysis signals were well-known to investors or made up by experimenters. The hardwired propensity of our brains to detect patterns combined with the non-natural environment of the stock market creates the illusion of expertise that is not easy to dispel.
Źródło:
Central European Management Journal; 2020, 28(2); 98-110
2658-0845
2658-2430
Pojawia się w:
Central European Management Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dwie metody wyznaczania przełożenia kinematycznego sprzężonych przekładni obiegowych z kołami stożkowymi
Two methods of determining the kinematic transmission ratio of coupled circulatory gears with bevel wheels
Autorzy:
Drewniak, Józef
Kądziołka, Tomasz
Kopeć, Jerzy
Powiązania:
https://bibliotekanauki.pl/articles/310079.pdf
Data publikacji:
2019
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
przekładnia planetarna
koła stożkowe
grafy konturowe
wzór Willisa
analiza kinematyki
planetary gear
conical wheels
contour graphs
Willis pattern
kinematics analysis
Opis:
W artykule przedstawiona zostanie analiza kinematyki sprzężonych przekładni planetarnych z kołami walcowymi i stożkowymi z wykorzystaniem metody grafów konturowych. Metoda ta była już stosowana do analizy kinematyki mechanizmów dźwigniowych oraz zębatych przekładni planetarnych zwykłych i sprzężonych z kołami walcowymi. Wyprowadzono także wzór na przełożenie kinematyczne wykorzystując wzór Willisa, dzięki czemu istnieje możliwość zweryfikowania metody grafów konturowych.
The paper will present an analysis of kinematics of coupled circulatory gears with cylindrical and bevel wheels with the use of contour graphs method. This method has already been used to analyze the kinematics of lever mechanisms and toothed planetary gears and planetary gears coupled with cylindrical wheels. A formula for kinematic gearing was also derived using Willis' formula, thanks to which it is possible to verify the metadata of contour graphs.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2019, 20, 1-2; 185-190
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of infill and density pattern on the mechanical behaviour of ABS parts manufactured by FDM using Taguchi and ANOVA approach
Autorzy:
Othmani, M.
Zarbane, K.
Chouaf, A.
Powiązania:
https://bibliotekanauki.pl/articles/2175753.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
fused deposition modelling
infill pattern
infill density
finite element analysis
Taguchi
modelowanie metodą osadzania topionego
wzór wypełnienia
gęstość wypełnienia
analiza elementów skończonych
Opis:
Purpose: The present work aims to investigate the effect of many infill patterns (rectilinear, line, grid, triangles, cubic, concentric, honeycomb, 3D honeycomb) and the infill density on the mechanical tensile strength of an Acrylonitrile Butadiene Styrene (ABS) test specimen manufactured numerically by FDM. Design/methodology/approach: Computer-Aided Design (CAD) software has been used to model the geometry and the mesostructure of the test specimens in a fully automatic manner from a G-code file by using a script. Then, a Numerical Design of Experiments (NDoE) has been carried out by using Taguchi method and the Analysis of Variance (ANOVA). The tensile behaviour of these numerical test specimens has been studied by the Finite Element Analysis (FEA). Findings: The FEA results showed that a maximal Ultimate Tensile Strength (UTS) was reached by using the ‘concentric’ infill pattern combined with an infill density of 30%. The results also show that the infill pattern and the infill density are significant factors. Research limitations/implications: The low infill densities of 20% and 30% that have already been used in many previous studies, we have also applied it in order to reduce the time of the simulations. Indeed, with high infill density, the simulations take a very excessive time. In an ongoing study, we predicted higher percentages. Practical implications: This study provided an important modelling tool for the design and manufacture of functional parts and helps the FDM practitioners and engineers to manufacture strong and lightweight FDM parts by choosing the optimal process parameters. Originality/value: This study elucidated the effect of various infill patterns on the tensile properties of the test specimens and applied for the first time a NDoE using numerical test specimens created by the mesostructured approach, which considerably minimized the cost of the experiments while obtaining an error of 6.8% between the numerical and the experimental values of the UTS.
Źródło:
Archives of Materials Science and Engineering; 2021, 111, 2; 66--77
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ergonomic design of interface for conceptual floor plan model and spatial event handling in rfid application
Autorzy:
Gavrilova, M.
Nayyar, S.
Gilgen, J.
Johnson, O.
Ghali, B.
Powiązania:
https://bibliotekanauki.pl/articles/333132.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:
RFID
Wi-Fi
ergonomia
interfejs użytkownika
zastosowania medyczne
floor model
path tracking
ergonomic
user interface
space and time pattern analysis
medical applications
Opis:
The development of advanced spatial-positioning and monitoring systems for medical monitoring and emergency response using RFID & Wi-Fi technologies is a large-scale research project being conducted at the ward W21C of Foothills Hospital, Calgary, Canada by University of Calgary. The scope of this project is to support real-time location tracking of medical equipments and personnel in hospital settings. In this context, we developed an innovative, interactive, decision-support medical system for tracking of personnel and high value medical equipments. The goal behind development of such a system is to provide a convenient, easy to use interface using existing technologies that allows to visualize and analyse clinical pathways and health care provider’s workflow pattern as well as to perform time motion studies and more advanced statistical pattern analysis. While achieving this goal, we aim to also fill the existing void of documentation and present to scientific community functional issues encountered along with their importance in success.
Źródło:
Journal of Medical Informatics & Technologies; 2009, 13; 169-174
1642-6037
Pojawia się w:
Journal of Medical Informatics & Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation of significance of AlkB and AlkA proteins in DNA repair in Escherichia coli model
Autorzy:
Sokołowska, B.
Maciejewska, A. M.
Jóźwik, A.
Kuśmierek, J. T.
Powiązania:
https://bibliotekanauki.pl/articles/333316.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:
rozpoznawanie obrazów
klasyfikator najbliższych sąsiadów
analiza cech pracy odbiornika
naprawa DNA
adaptacyjna odpowiedź
powstawanie mutacji
bakterie e.coli
pattern recognition
fuzzy k-NN classifier
ROC analysis
DNA repair
adaptive response
mutagenesis
AlkB dioxygenase
AlkA glycosylase
E.coli
Opis:
The paper concerns estimation of significance of differences of mutagenesis level between the wild-type strain (wt) and its derivatives which differ in DNA repair ability, namely alkA and alkB strain, devoided AlkA glycosylase and AlkB dioxygenase activity, respectively. The strains were analyzed for their ability to repair 1,N6-ethenoadenine (εA) - chloroacetaldehyde adduct to DNA. The analysis was done using classical statistical and pattern recognition methods. The obtained results confirmed that AlkB dioxygenase plays the most important role in εA repair in E. coli in the experimental modeling.
Źródło:
Journal of Medical Informatics & Technologies; 2011, 17; 321-326
1642-6037
Pojawia się w:
Journal of Medical Informatics & Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental Tests of the Vector II Slab in Field Conditions, Slab and Strip Model
Autorzy:
Zając, Jakub
Drobiec, Łukasz
Jasiński, Radosław
Wieczorek, Mirosław
Kisiołek, Artur
Powiązania:
https://bibliotekanauki.pl/articles/1838083.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
crack pattern
flexural analysis
interface
precast
slab
short-term load
pęknięcia
zginanie
prefabrykaty
płyty
obciążenie krótkotrwałe
Opis:
Vector II slab was tested on a natural scale (a slab with a dimension of 6.30 × 6.30 m) and a strip 6.30 m long and 1.20 m wide. The Vector II slab is built by precast panel 60 cm wide, 4 cm thick and 14-20 cm thick concrete overtopping on the construction site. The main purpose of the slab tests on a natural scale was to observe the "faulting" effect and temporary deflections. During the tests, the displacements in the area of the panel joints in the middle of the slab span were recorded. The maximum difference in displacement between adjacent panels of the slab model was 0.16 mm, and the vertical displacement was 1.9 mm. The strip model had no cracks that could indicate a interface cracks between the precast element and the concrete overlay. After completion of the field tests, the load was left on the slab model to verify long-term effects.
Źródło:
Civil and Environmental Engineering Reports; 2021, 31, 1; 54-69
2080-5187
2450-8594
Pojawia się w:
Civil and Environmental Engineering Reports
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental Tests of the Vector II Slab in Field Conditions, Slab and Strip Model
Autorzy:
Zając, Jakub
Drobiec, Łukasz
Jasiński, Radosław
Wieczorek, Mirosław
Kisiołek, Artur
Powiązania:
https://bibliotekanauki.pl/articles/1838085.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
crack pattern
flexural analysis
interface
precast
slab
short-term load
pęknięcia
zginanie
prefabrykaty
płyty
obciążenie krótkotrwałe
Opis:
Vector II slab was tested on a natural scale (a slab with a dimension of 6.30 × 6.30 m) and a strip 6.30 m long and 1.20 m wide. The Vector II slab is built by precast panel 60 cm wide, 4 cm thick and 14-20 cm thick concrete overtopping on the construction site. The main purpose of the slab tests on a natural scale was to observe the "faulting" effect and temporary deflections. During the tests, the displacements in the area of the panel joints in the middle of the slab span were recorded. The maximum difference in displacement between adjacent panels of the slab model was 0.16 mm, and the vertical displacement was 1.9 mm. The strip model had no cracks that could indicate a interface cracks between the precast element and the concrete overlay. After completion of the field tests, the load was left on the slab model to verify long-term effects.
Źródło:
Civil and Environmental Engineering Reports; 2021, 31, 1; 54-69
2080-5187
2450-8594
Pojawia się w:
Civil and Environmental Engineering Reports
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Exploration of spatial-temporal patterns in healthcare implementation of RFID indoor navigation system
Autorzy:
Nayyar, S.
Gavrilova, M.
Greenough, A.
Ghali, W.
Powiązania:
https://bibliotekanauki.pl/articles/333938.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:
Identyfikacja Radio-częstotliwości
sieć bezprzewodowa
System Lokalizacji i Identyfikacji Czasu Rzeczywistego
zastosowania medyczne
wizualizacja ścieżek klinicznych
analiza danych ilościowych
analiza wzorca czasu
zwiększenie skuteczności opieki zdrowotnej
RFID
Wi-Fi
RTLS
medical applications
clinical path visualization
quantitative data analysis
time pattern analysis
increasing efficacy of healthcare
Opis:
The development of advanced spatial-positioning systems for medical monitoring and emergency response using RFID and Wi-Fi technologies is a current research focus of many healthcare organizations. The goal of such system is to support real-time location tracking of medical equipments and personnel in hospital settings using RTLS technology. This paper presents a spatial-temporal data analysis based on data collected at the W21C of Foothills Hospital, Calgary, Canada. The collected data, comprising real-time observations and tracking paths, has been used to perform advanced statistical pattern analysis and visualization of work-flow patterns in health care system. From this analysis, we bring forward some insights into medical resource, asset and facility utilization in a clinical care ward of a regional healthcare organization. This gained knowledge could be used as one of the inputs in improving patient care, responsiveness, and infection control practices.
Źródło:
Journal of Medical Informatics & Technologies; 2010, 15; 81-86
1642-6037
Pojawia się w:
Journal of Medical Informatics & Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fossil population structure and mortality analysis of the cave bears from Ursilor Cave, north-western Romania
Autorzy:
Robu, M.
Powiązania:
https://bibliotekanauki.pl/articles/20701.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
fossil
population structure
mortality analysis
cave bear
Mammalia
Ursus spelaeus
cave taphonomy
death pattern
sex ratio
Ursilor Cave
Romania
Carpathians Mountains
Opis:
Research in cave bear palaeobiology focusing on population structure and mortality analysis may improve our understanding regarding the ecology of this species which vanished at the end of Marine Isotope Stage (MIS) 3, prior to Last Glacial Maximum (LGM), if assessed populations are large enough. Such population is available in Urşilor Cave, from north-western Romania, known as one of the most rich and complex European MIS3 cave bear sites. From the palaeontological excavation, situated at the lower level of the cave (= Scientific Reserve), more than 210 cave bear isolated lower molars, 160 mandibles and almost 180 canines were extracted and analyzed. The results obtained on the wear stages of the studied molars and mandibles indicated an “L”-shaped curve and suggest a non-attritional death pattern and a bone assemblage juvenile dominated. Moreover, the sex-ratio of upper and lower canines indicates a net dominance of females (5.4 females: 1 male). Although a “catastrophic” death pattern was obtained for cave bears, the animals seem to have died diachronically (non-simultaneously), over a time span of more than 6000 years. The triangular graph of age distribution is not appropriate for death assemblages from traps such as karst caves, where taphonomic processes like predation or scavenging would have played a less important role.
Źródło:
Acta Palaeontologica Polonica; 2016, 61, 2
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hidden Context Influence on Pattern Recognition
Autorzy:
Kulikowski, J. L.
Powiązania:
https://bibliotekanauki.pl/articles/307822.pdf
Data publikacji:
2013
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
decision making
hidden information
intuition
pattern recognition
scene analysis
Opis:
The influence of hidden additional information concerning the circumstances of input data acquisition on the quality of decisions based on the data is considered. An analogue to the intuition influencing natural decision making is indicated. The problem of contextual information in decision making based on Bayes rule, on reference data sets in various applications as well as of scene analysis by numerous examples is illustrated.
Źródło:
Journal of Telecommunications and Information Technology; 2013, 1; 72-78
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
IMAGE PATTERN ANALYSIS WITH IMAGE POTENTIAL TRANSFORM
Autorzy:
Oleg, Butusov
Dikusar, Vasily
Powiązania:
https://bibliotekanauki.pl/articles/452838.pdf
Data publikacji:
2018
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
Tematy:
binary image transform
distance and potential transform
statistical indices
geometric signatures
pattern analysis
pattern recognition
Opis:
Pattern analysis with image transform based on potential calculation was considered. Initial gray-scale image is sliced into equidistant levels and resulting binary image was prepared by joining of some levels to one binary image. Binary image was transformed under assumption that white pixels in it may be considered as electric charges or spins. Using this assumption Ising model and Coulomb model interaction between white pixels was used for image potential transform. The transform was calculated using moving window. The resulting gray-scale image was again transformed to binary image using the thresholding on 0.5 level. Further binary images were analyzed using statistical indices (average, standard deviation, skewness, kurtosis) and geometric signatures: area, eccentricity, Euler number, orientation and perimeter. It was found that the most suitable geometric signature for pattern configuration analysis of Ising potential transform (IPT) and Coulomb potential transform (CPT) is area value. Similarly the most suitable statistics is distance statistics between white pixels.
Źródło:
Metody Ilościowe w Badaniach Ekonomicznych; 2018, 19, 1; 12-27
2082-792X
Pojawia się w:
Metody Ilościowe w Badaniach Ekonomicznych
Dostawca treści:
Biblioteka Nauki
Artykuł

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