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Wyświetlanie 1-15 z 108
Tytuł:
New methods of underwater ship noise classification
Autorzy:
Kozaczka, E.
Kozaczka, S.
Powiązania:
https://bibliotekanauki.pl/articles/332374.pdf
Data publikacji:
2006
Wydawca:
Polskie Towarzystwo Akustyczne
Opis:
The detection, classification, identification and recognition ships noise features have been of the highest importance for scientific and also defense interest. A big effort is made in the passive sonar technologies that allow applying underwater noise for practical purpose. Results are presented which demonstrate the ability of the network to classify man made sources as are underwater ships noise. The paper presents a method based mainly on neural network that is very helpful for classification of these types of sources on the way to recognizing them.
Źródło:
Hydroacoustics; 2006, 9; 85-88
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New methods of marine power plant diagnostics
Autorzy:
Charchalis, A.
Szyfelbain, M.
Powiązania:
https://bibliotekanauki.pl/articles/245418.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
diesel engine
diagnostics
roughness
surface
silnik wysokoprężny
diagnostyka
chropowatość
powierzchnia
Opis:
Up-to-date, of high-tech design techniques of machine operation require constant monitoring on some levels. Generally, the monitoring today is limited to failure detection and machinery components check. The Marine Engineering Faculty of Gdynia Maritime University designed the System for Marine Engine Operation Assistance on the basis of Sulzer Diesel AL 25/30 testing station. The engine modernization and wider research and survey capabilities resulted in engine operation quality improvement, marine power plant research enhancement. The project broadens the research range and engine failure expertise as well as takes into consideration innovative marine fuel emissions. The goal has been achieved in the way of the test equipment modernization including: effective pressure sensors, high pressure fuel sensors, monitoring and visualization of the engine systems’ parameters, electronic indictors adopted to continuous operation at all cylinders in the same time, and high class decision aid computer equipment. Engine modernization and data base extension allow for carrying out a wide scope of research. Additionally, the article presents innovative diagnostic solutions together with their applications.
Źródło:
Journal of KONES; 2018, 25, 1; 33-40
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New Methods for Designing and Reduction of Neuro-Fuzzy Systems
Autorzy:
Cpałka, K.
Powiązania:
https://bibliotekanauki.pl/articles/108790.pdf
Data publikacji:
2010
Wydawca:
Społeczna Akademia Nauk w Łodzi
Tematy:
algorithm of best global eliminations
algorithm of best local eliminations
consecutive eliminations algorithm
consecutive mergings algorithm
interpretability
logical approach
neuro-fuzzy system
Opis:
In the paper, we propose novel methods for designing and reduction of neuro-fuzzy systems without the deterioration of their accuracy. The reduction and merging algorithms gradually eliminate inputs, rules, antecedents, and the number of discretization points of integrals in the center of area defuzzification method. Our algorithms have been tested using well known classification benchmark.
Źródło:
Journal of Applied Computer Science Methods; 2010, 2 No. 2; 113-126
1689-9636
Pojawia się w:
Journal of Applied Computer Science Methods
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New methods to determine similarity of signatures based on local extremes
Autorzy:
Doroz, R.
Mitas, M.
Powiązania:
https://bibliotekanauki.pl/articles/332892.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:
podpis własnoręczny
dynamiczne cechy podpisu
metody regresji liniowej
dynamiczny czas wypaczania
handwritten signatures
dynamic signature features
linear regression method
dynamic time warping
Opis:
Authentication based on handwritten signature is one of the most accepted authentication systems based on biometry. In this paper a method for the automatic verification of on-line handwritten signatures using three similarity measures is described. The proposed approach, is based on extreme values and dynamic features of the signature. In investigations proposed coefficients together with the factor [R2] were connected and new signature recognition quality has been achieved.
Źródło:
Journal of Medical Informatics & Technologies; 2008, 12; 63-67
1642-6037
Pojawia się w:
Journal of Medical Informatics & Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Displacement piles - classification and new methods for the calculation of bearing capacity
Autorzy:
Gwizdała, Kazimierz
Więcławski, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/118727.pdf
Data publikacji:
2020
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
displacement pile
bearing capacity
load–settlement
pile foundation
Eurocode 7
Opis:
The paper presents technological changes concerning not only the method of construction, but also the materials used. Another aspect is the methods of calculating the load-bearing capacity and settlement of piles. With acceptance for use the PN-EN:1997-1:2008 standard in 2010, it was necessary to change the approaches applied that based on many years of experience and tradition. The best method in this case is to forecast the full load-settlement characteristics. On the basis of the collected data, a comparative analysis of particular displacement piles technologies was made. The usefulness of individual methods of load-bearing capacity calculation depending on the pile technology was determined.
Źródło:
Scientific Review Engineering and Environmental Sciences; 2020, 29, 3; 308-318
1732-9353
Pojawia się w:
Scientific Review Engineering and Environmental Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New methods for inactivation of Alicyclobacillus acidoterrestris spores in apple juice concentrate
Autorzy:
Djas, M.
Bober, M.
Henczka, M.
Powiązania:
https://bibliotekanauki.pl/articles/115690.pdf
Data publikacji:
2011
Wydawca:
Fundacja na Rzecz Młodych Naukowców
Tematy:
Alicyclobacillus acidoterrestris
spores
inactivation
pulsed electric field (PEF)
ultrasound (US)
microwaves (MW)
Opis:
This paper is focused on new methods for inhibiting Alicyclobacillus acidoterrestris spores germination in apple juice concentrate. Four methods such as pulsed electric field (PEF), ultrasound (US), integrated method of PEF and US and microwaves (MW) have been investigated. The highest efficiency of spores inactivation was obtained after microwave treatment.
Źródło:
Challenges of Modern Technology; 2011, 2, 2; 46-49
2082-2863
2353-4419
Pojawia się w:
Challenges of Modern Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On new methods of dynamic ensemble selection based on randomized reference classifier
Autorzy:
Krysmann, M.
Kurzyński, M.
Powiązania:
https://bibliotekanauki.pl/articles/332974.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:
uczenie maszynowe
kompetencja klasyfikatora
systemy wielo-klasyfikatorów
machine learning
classifier competence
multiple classifier systems
dynamic competence threshold
Opis:
In the paper two dynamic ensemble selection (DES) systems are proposed. Both systems are based on a probabilistic model and utilize the concept of Randomized Reference Classifier (RRC) to determine the competence function of base classifiers. In the first system in the selection procedure of base classifiers the dynamic threshold of competence is applied. In the second DES system, selected classifiers are combined using weighted majority voting rule with continuous-valued outputs, where the weights are equal to the class-dependent competences. The performance of proposed MCSs were tested and compared against DES system with better-than-random selection rule using eleven databases taken from the UCI Machine Learning Repository. The experimental results clearly show the effectiveness of the proposed methods.
Źródło:
Journal of Medical Informatics & Technologies; 2012, 20; 101-107
1642-6037
Pojawia się w:
Journal of Medical Informatics & Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New methods of hopping (dryhopping) and their impact on sensory properties of beer
Autorzy:
Podeszwa, T.
Harasym, J.
Powiązania:
https://bibliotekanauki.pl/articles/105602.pdf
Data publikacji:
2016
Wydawca:
Centrum Badań i Innowacji Pro-Akademia
Tematy:
hop
dry hopping
beer
bitterness
aroma
hopping
chmiel
piwo
gorycz
aromat
Opis:
Due to the significant changes on the beer market the flourishing development of small and craft breweries is clearly observed. Upgraded consumers’ expectation led to many technological challenges in brewing process resulting in novel methods of manufacturing of many different beer types. As bitterness and aroma are two crucial quality features of beer and many scientific efforts have been done especially in the area of hop aroma. Despite the predominant impact of main beer flavor compound e.g. linalool, other substances also contribute to the hoppy beer aroma through additive or synergistic effects not only raw materials used but also hopping regimes contribute as well to final flavor release though several new methods of hopping, particularly dry hopping have been developed.
Źródło:
Acta Innovations; 2016, 21; 81-88
2300-5599
Pojawia się w:
Acta Innovations
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Durability and wear of engine parts – new methods of testing of alloys and composites
Autorzy:
Ranachowski, Z.
Pawełek, A.
Jasieński, Z.
Piątkowski, A.
Kudela Jr., S.
Lewandowski, M.
Mazuruk, P.
Powiązania:
https://bibliotekanauki.pl/articles/360606.pdf
Data publikacji:
2013
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
Diesel engines diagnostics
light alloys and composites
Common Rail fuel system
Acoustic Emission method
Opis:
The paper deals with the problems related to the diagnostics of selected parts of modern Diesel engines. The evolution of mechanical properties of four alloys of Mg-Li-Al system and four composites made on the base of the alloys mentioned above, caused by variation of its composition was presented. The Acoustic Emission (AE) method applied to monitoring of degradation of mechanical properties of the alloys and composites was described. Moreover, the results of the investigation of failures occurring in the injectors of Common Rail Diesel engines performed with the application of AE method were also reported.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2013, 35 (107); 125-131
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Neural activity and new methods of computational analysis in the model of mammalian brain cortex
Autorzy:
M. Wójcik, Grzegorz
Falski, Marek
Ruthe, Jan
Żukowski, Michał
Stanisławek, Dorota
A. Kamiński, Wiesław
Powiązania:
https://bibliotekanauki.pl/articles/764355.pdf
Data publikacji:
2007
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Źródło:
Annales Universitatis Mariae Curie-Skłodowska. Sectio AI, Informatica; 2007, 6, 1
1732-1360
2083-3628
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska. Sectio AI, Informatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermal Calculation of Ground Contact Structures: New Methods Based on Parametrized Transient Finite Element Thermal Modeling
Autorzy:
Nagy, B.
Powiązania:
https://bibliotekanauki.pl/articles/1401954.pdf
Data publikacji:
2015-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
44.05.+e
44.10.+i
Opis:
The heat loss at ground contact structures is taken into consideration in building heat loss calculations. However, it implies uncertainties due to the physical properties of the soil as well as the building structure. In this paper, new methods are introduced for calculating the heat loss at ground contact structures. Firstly, it examines the presently used and general calculation methods and their shortcomings. Then a simple-to-use method based on thousands of results of parametrized transient finite element thermal models is shown. In this research, the calculations take the middle-eastern European climate conditions, geothermal gradient and soil properties as well as the relevant harmonized EU standards into account. The equivalent linear heat transfer coefficients, which in this method also contain the effects of thermal bridges, occurring in various conditions are summarized in a table and can be calculated by new formulae also shown in the paper using condition-dependent constants, the ground floor's heat transfer coefficient and the length between the floor and ground level.
Źródło:
Acta Physica Polonica A; 2015, 128, 2B; B-164-B-166
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New Methods for Air Traffic Controller Main Solution Taking Dominant Determination Concerning Their Attitude to Risk
Autorzy:
Borsuk, Sergii Pavlovich
Powiązania:
https://bibliotekanauki.pl/articles/504321.pdf
Data publikacji:
2017
Wydawca:
Międzynarodowa Wyższa Szkoła Logistyki i Transportu
Tematy:
air traffic controllers attitude to flight norms violations
closed decision taking task
estimate usefulness function characteristic points
risk premium
efficiency of main solution taking dominant determination
Opis:
Taking into account the influence of human factor on flight safety one may say that ICAO flight safety main concept components mutually influence each other. This is based on the perspective of “aviation personnel attitude to safe actions and conditions” as the main factor of flight safety. This attitude may be found with help estimate usefulness functions construction and analysis for aircraft flight norms values based on air traffic controllers indexes in decision taking tasks. One way to find the main solution is taking dominant that defines air traffic controller attitude to flight level norms violation as to risk (tending, indifferent, non-tending to risk) is with the help of a “risk premium” criterion. Historically, the criterion included a single variable point in estimate usefulness function. Two improved criteria that include several characteristic points of usefulness function are proposed. As a result of new criteria appliance the main solution taking dominant determination efficiency increased up to 18 %.
Źródło:
Logistics and Transport; 2017, 33, 1; 25-30
1734-2015
Pojawia się w:
Logistics and Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Role of pro-inflammatory cytokines of pancreatic islets and prospects of elaboration of new methods for the diabetes treatment
Autorzy:
Cieślak, Marek
Wojtczak, Andrzej
Cieślak, Michał
Powiązania:
https://bibliotekanauki.pl/articles/1039121.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
interleukin 1β
interleukin-6
tumor necrosis factor-α
pancreatic derived factor
insulin resistance
Opis:
Several relations between cytokines and pathogenesis of diabetes are reviewed. In type 1 and type 2 diabetes an increased synthesis is observed and as well as the release of pro-inflammatory cytokines, which cause the damage of pancreatic islet cells and, in type 2 diabetes, the development of the insulin resistance. That process results in the disturbed balance between pro-inflammatory and protective cytokines. Pro-inflammatory cytokines such as interleukin 1β (IL-1β), tumor necrosis factor-α (TNF-α) and interferon-γ (IFN-γ), as well as recently discovered pancreatic derived factor PANDER are involved in the apoptosis of pancreatic β-cells. Inside β-cells, cytokines activate different metabolic pathways leading to the cell death. IL-1β activates the mitogen-activated protein kinases (MAPK), affects the nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) and activates the inducible nitric oxide synthase (iNOS). TNF-α and IFN-γ in a synergic way activate calcium channels, what leads to the mitochondrial dysfunction and activation of caspases. Neutralization of pro-inflammatory cytokines, especially interleukin 1β with the IL-1 receptor antagonist (IL-1Ra) and/or IL-1β antibodies might cause the extinction of the inflammatory process of pancreatic islets, and consequently normalize concentration of glucose in blood and decrease the insulin resistance. In type 1 diabetes interleukin-6 participates in regulation of balance between Th17 and regulatory T cells. In type 2 diabetes and obesity, the long-duration increase of IL-6 concentration in blood above 5 pg/ml leads to the chronic and permanent increase in expression of SOCS3, contributing to the increase in the insulin resistance in cells of the skeletal muscles, liver and adipose tissue.
Źródło:
Acta Biochimica Polonica; 2015, 62, 1; 15-21
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Risks of boiler operation during slagging and fouling process – a new methods for the determination of ash sintering temperatures
Autorzy:
Urbanek, B.
Szydełko, A.
Czajka, K.
Powiązania:
https://bibliotekanauki.pl/articles/115821.pdf
Data publikacji:
2013
Wydawca:
Fundacja na Rzecz Młodych Naukowców
Tematy:
mineral matter
sintering
fouling
Leitz test
strength method
pressure-drop method
materia mineralna
proces spiekania
zanieczyszczenia
test Leitz
metoda sił
metoda spadku ciśnienia
Opis:
The properties of mineral matter occurs in coal in the form of inorganic compounds leads to slagging and fouling process on boiler heating surfaces, burners and ash hopper. The deposition of ash cause many undesirable phenomena such as heat transfer deterioration, damage to internal parts of the boiler as a result of detachment of large agglomerates and finally, costly shutdowns of the boiler. Standardized method of risk assessment of agglomerates formation and sintered fly ash is determined by four melting temperatures of ash. This measurement is based on visual appraisal of ash sample deformation which is subjective and strongly depends on the experience of the person conducting the test. Especially is hard predict the first two temperatures: deformation and sintering. An article has to present three non-standardized methods for determining the sintering temperature by using physical parameters: pressure drop and minimum force of probe destruction. This type of measurement allows a quantitative way to obtain reliable and meaningful result. The experiment showed that the results of non-standard methods deviate from those set using the Leitz method. This allows to conclude that sintering processes occur at much lower temperatures and changing the shape of the initial (test method Leitz) is not the first symptom of demonstrating the melting of the ash.
Źródło:
Challenges of Modern Technology; 2013, 4, 2; 47-52
2082-2863
2353-4419
Pojawia się w:
Challenges of Modern Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermomechanical Analysis of the Possibility of Using New Methods of Complex Extrusion for Manufacturing the Inner Toothing of Spline Sleeves
Autorzy:
Michalczyk, J.
Wiewiórowska, S.
Powiązania:
https://bibliotekanauki.pl/articles/355393.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
complex extrusion
spline sleeves
forging gear
new method extrusion
Opis:
In the paper presents two new patented of unconventional methods author’s and sleeve-type products of extruding [PL219182, PL221425]. The extrusion methods have been developed with the aim of reducing the energy and force parameters during the plastic forming of material. Traditional methods of extruding similar products are characterized by considerably higher extrusion force magnitudes. This results in substantial limitations and problems of an engineering nature. Moreover, the proposed methods of producing bottomed and bottomless sleeves are distinguished by the capability to minimize or totally eliminate the waste. The author’s methods of extruding long bottomless sleeves, presented herein, were used for developing a method for shaping inner toothing in spline sleeves. The theoretical analysis is based on thermomechanical simulation of the possibility of applying such processes to the extrusion of spline shafts with inner toothing. Next, the obtained results were compared with analogous parameters for classical indirect extrusion. The possibility of shaping inner toothing over the entire product length according to the proposed spline sleeve plastic forming methods was also explored.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 4; 1447-1453
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 108

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