Informacja

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

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "Skubis, J." wg kryterium: Autor

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-14 z 14
    Tytuł:
    Jakość trofealna muflonów tryków pozyskanych w Górach Bardzkich
    Trophy quality of mouflons in the Bardzkie Mountains
    Autorzy:
    Wajdzik, M.
    Witek, K.
    Nasiadka, P.
    Skubis, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/991359.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lowiectwo
    Gory Bardzkie
    zwierzyna plowa
    muflon
    Ovis musimon
    tryki
    trofea lowieckie
    slimy
    jakosc
    mouflon
    horns
    bardzkie mountains
    cic
    Opis:
    The aim of the study was to characterize individual quality of mouflon harvested in the Bardzkie Mountains (south−west Poland). The assessment criteria included horn dimensions, i.e. their length, circumference (base, middle and top), spread and twist. These features were individually analyzed for each mouflon ram. Medal value of the trophies expressed as CIC scores increased with the ram age reaching 187.12 for 6−years−old animals. Three out of 50 measured trophies were classified into the bronze medal category, as they crossed the threshold of 185 CIC points. All medal−winning individuals were 6 years old.
    Źródło:
    Sylwan; 2014, 158, 12; 911-919
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ lesistości i rodzaju gleb na jakość osobniczą rogaczy sarny na terenie Kielecczyzny
    Impact of forest cover and the soil type on the quality of male roe deer in the Kielce region
    Autorzy:
    Wajdzik, M.
    Konieczny, G.
    Nasiadka, P.
    Szyjka, K.
    Skubis, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/989593.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    lowiectwo
    zwierzeta lowne
    sarna europejska
    Capreolus capreolus
    samce
    rogacze
    jakosc osobnicza
    masa tuszy
    masa poroza
    dlugosc tyk
    wymiary czaszki
    czynniki siedliska
    lesistosc
    podloze glebowe
    Kielecczyzna
    roe deer
    carcass
    antlers
    weight
    forest cover
    soil type
    Opis:
    The aim of the study was to verify the hypothesis that the quality of male roe deer hunted in the Kielce region depends on the selected characteristics of the place of their earlier habitat (forest cover, soil) and the age of the individuals. As a criteria to verify that hypothesis we chose carcass weight, weight and height of the antlers and skull dimensions. Material consisted of carcasses and antlers of 1349 bucks harvested in 169 hunting districts in the Kielce region (central Poland). We found that the individual quality of male roe deer was diverse. Significant impact was found for the forest cover, diversity of soil types and age of the individuals. Roe deer with the smallest carcass weight, having significantly lighter antlers occurred in areas with the forest cover of over 40% (tab. 1). In turn, in the filed−type circuits, where the forest cover does not exceed 20%, bucks were much heavier and imposed massive antlers (fig. 1). There was also evidence that in areas where the fertile soil dominated (rendzina and chernozems) individual quality of deer was significantly better than in districts where poor fawn and rust soils predominated (fig. 2). The examined environmental factors had the greatest impact on carcass or antlers weight, as well as the dimensions of deer skulls in case of the youngest bucks and their impact decreased with age. Optimum of the individual's development in terms of carcass weight and antler falls at the age of seven. Bucks harvested in the Kielce region, in comparison to the other populations in Poland, were characterized by good individual quality and slightly subsided only to individuals from the Lublin Upland (tab. 2).
    Źródło:
    Sylwan; 2016, 160, 05; 424-432
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Aktualne możliwości i perspektywy zastosowania metody emisji akustycznej w diagnostyce układów izolacyjnych
    Present possibilities and prospects of the acoustic method application in diagnostics of insulation systems
    Autorzy:
    Skubis, J.
    Boczar, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/153254.pdf
    Data publikacji:
    2006
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    metoda emisji akustycznej
    wyładowania niezupełne
    system ekspercki
    acoustic emission method
    partial discharges
    expert system
    Opis:
    W artykule zostały scharakteryzowane prowadzone obecnie przez autorów artykuły prace związane z doskonaleniem akustycznej metody pomiaru wyładowań elektrycznych, jakie mogą występować w układach izolacyjnych urządzeń elektroenergetycznych. Szczególną uwagę zwrócono na ekspercki system diagnostyczny wykorzystujący metodę emisji akustycznej do oceny stanu mierzonej izolacji transformatorów energetycznych.
    The paper characterizes the research work on the improvement of the acoustic method of the measurements of electrical discharges that can occur in insulation systems of power appliances. The utmost attention was directed to the expert diagnostic system using the acoustic emission method for the evaluation of the condition of the power transformer insulation measured.
    Źródło:
    Pomiary Automatyka Kontrola; 2006, R. 52, nr 10, 10; 44-45
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocena stanu technicznego transformatorów elektroenergetycznych z wykorzystaniem metody emisji akustycznej
    Diagnostics of technical condition of power transformers with use of the Acoustic Emission Method
    Autorzy:
    Skubis, J.
    Borucki, S.
    Cichoń, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/153873.pdf
    Data publikacji:
    2011
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    transformator elektroenergetyczny
    metoda emisji akustycznej
    wyładowania niezupełne
    izolacja papierowo-olejowa
    diagnostyka
    power transformer
    acoustic emission method
    partial discharges
    paper-oil insulation
    diagnostic
    Opis:
    Tematyka artykułu dotyczy wykonanych przez pracowników Politechniki Opolskiej badań związanych z detekcją, oceną intensywności i lokalizacją wyładowań niezupełnych metodą emisji akustycznej w trzech transformatorach elektroenergetycznych o mocach 125, 160 i 400 MVA. Rezultatem przeprowadzonych prac było sformułowanie rekomendacji technicznych dotyczących aktualnego stanu technicznego badanych jednostek. Analizę zarejestrowanych impulsów akustycznych przeprowadzono w dziedzinie czasu, częstotliwości i czasowo-częstotliwościowej.
    An important part of a comprehensive evaluation of the technical condition of power transformers is detection, assessment of the intensity and location of partial discharges (PDs), that may occur in their paper-oil insulation systems. Modern monitoring techniques are increasingly using the acoustic emission (AE) method, which combines the features of the gas chromatography and electricity methods, to evaluate the electrical discharge. The paper presents investigations performed by a team of the Opole University of Technology dealing with the detection, evaluation, intensity and location of PDs by means of the AE method for three transformers of 125, 160 and 400 MVA power. The result of this work was formulation of technical recommendations for the current technical condition of units. The analysis of the recorded pulses EA was conducted in the time, frequency and time-frequency domain. The paper generally characterizes the possibility of the AE method, and the used measuring system (Fig. 1). There are given the technical parameters of the energy object under study (Figs. 2, 7 and 11). The results of detection, assessment of the intensity and location of electrical discharges in transformers diagnosed are shown in Figs. 3, 5, 6, 9, 10, 13, 14 and Tables 1-4.
    Źródło:
    Pomiary Automatyka Kontrola; 2011, R. 57, nr 4, 4; 343-347
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Praktyczny przykład skutecznej detekcji i lokalizacji wyładowań niezupełnych metodą emisji akustycznej w transformatorze elektroenergetycznym
    Practical example of effective detection and location of partial discharges by the acoustic emission method in an electric power transformer
    Autorzy:
    Skubis, J.
    Cichoń, A.
    Borucki, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/155763.pdf
    Data publikacji:
    2009
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    wyładowania niezupełne
    metoda emisji akustycznej
    diagnostyka
    transformator elektroenergetyczny
    partial discharges
    acoustic emission method
    diagnostics
    power transformer
    Opis:
    W artykule przedstawiono przykład diagnostyki transformatora elektro-energetycznego pod kątem oceny stanu technicznego papierowo - olejowego układu izolacyjnego zagrożonego występowaniem wyładowań niezupełnych (WNZ). Badania przeprowadzono podczas normalnej pracy jednostki transformatorowej, rejestrując w 36 punktach na powierzchni kadzi sygnały emisji akustycznej (EA) pochodzącej od zjawisk fizycznych występujących wewnątrz transformatora. Zarejestrowane sygnały poddano analizie w dziedzinie czasowej, częstotliwościowej i czasowo - częstotliwościowej. Wynikiem badań była detekcja i lokalizacja miejsca występowania wyładowań elektrycznych oraz wskazanie prawdopodobnej przyczyny i miejsca ich powstawania.
    Three measurement methods: gas chromatography method (DGA), electrical method and AE method are used in the assessment of the technical condition of paper-oil insulation of high-power transformers exposed to the occurrence of partial discharges (PDs). The acoustic method of PD detection is used as a supplementary one to the two others, mainly the gas chromatography method which does not make it possible to locate the place of the insulation system defect appearance. The basic advantage of the AE method, compared with the electrical one, is the possibility of its application during regular operation of power appliances [2, 3]. The paper presents the measurement results of the AE signals accompanying regular operation of a power transformer of 270 MVA. In order to assess the intensity of the AE signals measured on the object under study, coming from physical phenomena taking place inside a tub, three analyses were performed: in the time, frequency and time-frequency domains. Registration of the AE signals, the distributions of which is shown in Fig. 2, was carried out at 36 measurement points. An exemplary waveform of the AE signals registered is shown in Fig. 3, while the results of the analysis in the time domain are listed in Tables 1 and 2. In order to assess the waveforms registered more accurately, the analysis in the frequency domain was carried out and amplitude spectra were determined, an example of which is presented in Fig. 4. The time-frequency analysis was performed by using a short-time Fourier transform (STFT) determining two-dimensional spectrograms of the power density spectrum (Fig. 5). The assessment of the technical condition of the transformer under study made it possible to detect and locate areas in which PDs occurred. Damage of magnetic screens is a probable cause of their occurrence.
    Źródło:
    Pomiary Automatyka Kontrola; 2009, R. 55, nr 1, 1; 30-33
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Aktualny stan badań nad muflonem (Ovis musimon) jako podstawa do zarządzania, ochrony lub eliminacji tego gatunku z Polski
    Current state of research on mouflon (Ovis musimon) as a basis for management, protection or elimination of this species from Poland
    Autorzy:
    Nasiadka, P.
    Wajdzik, M.
    Skubis, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/989850.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    lowiectwo
    zwierzeta lowne
    gospodarka lowiecka
    muflon
    Ovis musimon
    stan wiedzy
    badania naukowe
    Polska
    bibliografia
    ovis musimon
    poland
    research
    bibliography
    Opis:
    The paper presents the first Polish bibliography on mouflon that includes papers published in the years 1945−2014. Forty seven publications show diversified interest in mouflon depending on its population size. Three different periods of research activity and publishing were distinguished. The first one (1945−1960) called the ‘opening balance' was the time of assessment of mouflon in Poland after the World War 2. At that time, mouflon status as an alien species was not taken into account. After the first unsuccessful attempts of introduction, ‘period of ambivalence' in the research and publishing activity occurred. In years 1961−1990 only nine publications, mainly popular ones, about the biology and occurrence of the species in Poland, and the history of its introduction were published. Along significant increase in number in the early 1990s, there was a significant increase in interest in this species among scientists. Majority of Polish research on mouflon has been published in the ‘renaissance' phase (since 1991). Papers deal with genetic testing, parasitology or telemetry, but knowledge about the role of mouflon in the ecosystem is still insufficient. Preliminary analysis of the number of publications and their subject (figs. 1 and 2) clearly shows that despite its 70−year history in Poland, the mouflon is still little−known species. Well−documented history of the reintroductions and their development is accompanied by almost complete lack of knowledge about the ecology. In terms of hunting management, protection or elimination of this species from Poland, there are currently no any reliable information, which could be useful for decision−makers. Mouflon has been a species of small numbers, not causing severe damage to forests and fields, and apparently not influencing negatively other ungulates in the areas of its occurrence. Not being a source of hunting successes or environmental problems it still remains outside the interest of scientists. At first mouflon was promoted, but later on, sometimes after many years, researchers tried to answer basic matters. Currently priority should be given to the research on i) the genetic condition of all local populations and evaluate their stability, ii) the interaction between mouflon and other wild ungulates, iii) its dietary composition in terms of damage to forests and fields, iv) parasites in isolated populations and v) assessment of the future of the species in Poland in the time of significant increase in wolf population.
    Źródło:
    Sylwan; 2015, 159, 05; 381-391
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bezpośrednie obserwacje zwierzyny jako element monitorowania dużych kopytnych na przykładzie łosi (Alces alces L.) w Kampinoskim Parku Narodowym
    Direct observations of wildlife as an element of the monitoring of large ungulates on the example of moose (Alces alces L.) in the Kampinoski National Park
    Autorzy:
    Nasiadka, P.
    Skubis, J.
    Wajdzik, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/989781.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    lasy
    zwierzeta lowne
    los
    Alces alces
    monitoring
    obserwacje zwierzat
    obserwacje bezposrednie
    Kampinoski Park Narodowy
    wildlife monitoring
    direct observation
    alces alces
    Opis:
    More than 3000 direct observations of 5900 mooses were used to investigate the sex structure and growth of the population living in the Kampinoski National Park (KNP, central Poland). The study used data collected by the park service since 1998. To confirm the hypothesis that the random observations will accurately describe the population structure the experiment was performed with a theoretical population. It was a collection of 102 numbers (1−39 for females, 40−81 for males, and 82−102 for calves). Sex structure of this population was 1:1 and the growth rate was 0.6 calf/female. To provide the randomness all ‘animals' were mixed and renumbered. Each time we drew 4 numbers (like 4 random moose observed). The drawn numbers were grouped into: males, females and calves. Results of the consecutive draws were accumulated, while sex ratio and growth rate of this hypothetical population were constantly recalculated. Changes in ratios with increasing abundance of ‘recorded' moose were observed. It was assumed that the accuracy of estimates of population structure will increase with the number of observed animals and ultimately the results of the draw will show real sex structure and growth of analyzed population. The draw was repeated three times. Each time the results confirmed the hypothesis. A similar procedure was performed for empirical data from KNP. The documented direct observation of moose throughout the year provides a reliable assessment of the sex structure and population growth. At a constant, daily assessment of gender structure requires longer observation time than evaluation of growth. Application of these traits based on a small empirical material and/or short follow−up time may result in significant errors. The sex structure of moose in KNP is at the level of about 1:2, while growth at 0.8 calf/female. The values of indicators describing these characteristics are higher than previously adopted for the purposes of hunting of moose use in Poland. It would clarify the methodology of recording observations – a clear definition of calf age (0−1 years) and a separate listing of moose treated as an independent one−year age group. It is also strict principle of not combining several separate observations (e.g. summary of the daily observations) as one independent observation. The method of accumulation of direct observation to assess the gender structure and growth should be tested in other deer species.
    Źródło:
    Sylwan; 2015, 159, 07; 565-578
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preferencje żerowe saren w odniesieniu do różnych odmian jabłoni z punktu widzenia wykorzystania tego gatunku w urządzaniu łowisk leśnych
    Preferences of roe deer to different varieties of apple from the point of view of managing the forest hunting grounds
    Autorzy:
    Nasiadka, P.
    Bors, K.
    Wajdzik, M.
    Skubis, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/989505.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lowiectwo
    zwierzeta lowne
    sarny
    preferencje pokarmowe
    preferencje zerowe
    szkody lowieckie
    lowiska lesne
    baza pokarmowa
    jablonie
    odmiany roslin
    dobor odmian
    urzadzanie lowisk
    capreolus capreolus
    malus domestica
    damage
    orchard
    browsing
    Opis:
    The results of the inventory of damage caused by roe deer in a 2−year−old apple orchard in central Poland permitted to evaluate the browsing intensity as well as the relationship between biometric characteristics of trees and browsing intensity. The research showed that damage caused by the roe deer was mainly caused by shoot browsing, then rubbing the velvet antlers against trees and bark stripping. In one winter, roe deer damaged 35% of the orchard by browsing even up to 100% shoots on an individual tree. Significant differences were found between the intensity of browsing the different varieties of apple trees. The largest damage was noted in the case of the Ligol variety (35% of shoots on average), while the smallest – for the Idared and Golden Delicious varieties (approximately 5% of shoots on average). Branching and tree height were not found to affect the level of damage. When establishing forest hunting grounds, the Ligol variety, eagerly browsed by roe deer, should be planted on browsing plots, while Idared and Golden Delicious varieties – in orchards designed for fruiting.
    Źródło:
    Sylwan; 2016, 160, 10; 837-845
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wykorzystanie reflektometru do badania oleju transformatorowego
    Use of a reflectometer for transformer oil testing
    Autorzy:
    Muszyński, P.
    Skubis, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/153250.pdf
    Data publikacji:
    2006
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    reflektometr
    oleje izolacyjne
    badania diagnostyczne
    reflectometer
    insulating oils
    diagnostic tests
    Opis:
    W artykule przedstawiono możliwości wykorzystania reflektometru do badania oleju transformatorowego. Scharakteryzowano metrologiczne właściwości reflektometru optycznego. Przedstawiono przykładowe wyniki pomiarów zmian współczynników Fresnela na końcu włókna światłowodowego dla olejów izolacyjnych o różnym stopniu zestarzenia. W konkluzji określono perspektywy wykorzystania optycznej techniki pomiarowej do określenia stopnia zestarzenia olejów izolacyjnych.
    In the article, possibilities of using a reflectometer for transformer oil testing have been presented. Metrological properties of the optical reflectometer have been characterized. Exemplary measurement results of Fresnel factor changes at the end of an optical fibre for insulating oil of various ageing degree have been presented. The conclusion points out numerous perspectives of using optical measurement technique to determine the ageing degree of insulation oils.
    Źródło:
    Pomiary Automatyka Kontrola; 2006, R. 52, nr 10, 10; 46-48
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hunting in Poland as part of the sustained development of rural areas
    Autorzy:
    Labudzki, L.
    Kamieniarz, R.
    Gorecki, G.
    Skubis, J.
    Wierzbicka, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/38746.pdf
    Data publikacji:
    2009
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    hunting
    Polska
    rural development
    rural area
    tourism
    Opis:
    Due to state ownership of both free game and most forests in Poland, large hunting districts and low number of hunters, hunting in Polish hunting grounds provides an opportunity to encounter many animal species, often in their almost natural environment. The qualities of Poland’s fauna and flora as well as Poland’s accession to the EU and the resulting ease of movement have contributed to the development of hunt tourism. As a consequence, there has been a rise in the demand for services offered by rural areas inhabitants, which in turn should make local communities recognize the need to preserve the natural environment.
    Źródło:
    Folia Forestalia Polonica. Series A . Forestry; 2009, 51, 1
    0071-6677
    Pojawia się w:
    Folia Forestalia Polonica. Series A . Forestry
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterization of selected techniques of maceration bones of Gallus gallus domesticus
    Charakterystyka wybranych technik maceracji kości Gallus gallus domesticus
    Autorzy:
    Kempa, K.
    Kulawik, M.
    Bartyzel, B.J.
    Jakubowski, M.
    Skubis, J.
    Koczon, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/82524.pdf
    Data publikacji:
    2016
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Źródło:
    Folia Pomeranae Universitatis Technologiae Stetinensis. Agricultura, Alimentaria, Piscaria et Zootechnica; 2016, 39, 3(328)
    2081-1284
    Pojawia się w:
    Folia Pomeranae Universitatis Technologiae Stetinensis. Agricultura, Alimentaria, Piscaria et Zootechnica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Przydatność danych z wyszukiwarki internetowej do analizy intensywności inwazji biologicznej na przykładzie szopa pracza
    Potential of data from the Internet search engine to analyze of biological invasion intensity on the example of Procyon lotor
    Autorzy:
    Dyderski, M.K.
    Biegańska, A.
    Królik, K.
    Rydzińska, S.
    Żychlińska, A.
    Kamieniarz, R.
    Skubis, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/989496.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    zwierzeta lowne
    gatunki obce
    gatunki inwazyjne
    szop pracz
    Procyon lotor
    liczebnosc
    dane statystyczne
    wyszukiwarki internetowe
    model ARIMA
    raccoon
    invasive species
    predators
    hunting
    arima
    Opis:
    Biological invasions are one of the most important problems of nature conservation, which affect several branches of forestry and game management. In case of recent invasions, there is a problem with assessment of invasion intensity due to insufficient quantity of data. In Poland, eight of 31 game species are alien and three small predators are serious threat to biological diversity. The most recent of them is raccoon (Procyon lotor L.). Similarly to studies about rodents and flu, we tested potential of Google search engine to assess whether it may be used as a proxy for species abundance, by downloading search index of phrase 'szop pracz' (i.e. raccoon). We decomposed time series of search intensity in weak intervals into trend, seasonal and remainder, and identified sources of variability within these elements. We also proved, that this time series may be modeled using four moving average model, according to ARIMA technique. Seasonal element was connected with species biology – raccoon was recorded less frequently in winter, due to its lower activity in this time. Remainder was connected with entertainment and law regulation news in most popular websites, which resulted the peak of search index in 2009, when there was a change in length of hunting season for raccoon. Moreover, we proved that annual sums of search indices were positively correlated with hunting gain of raccoon (p<0.05; R²=0.34), thus studied time series is connected with biological phenomena of raccoon invasion. Our results show that search engine queries may be useful in predicting and reconstruction of biological invasions.
    Źródło:
    Sylwan; 2016, 160, 10; 822-828
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Diagnostyka stanu technicznego obwodu magnetycznego transformatorów energetycznych z wykorzystaniem zmodyfikowanej metody wibroakustycznej
    Diagnostics of technical condition of power transformer magnetic circuit with use of a modified vibroacoustic method
    Autorzy:
    Borucki, S.
    Cichoń, A.
    Skubis, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/153431.pdf
    Data publikacji:
    2013
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    transformator elektroenergetyczny
    drgania mechaniczne
    metoda wibroakustyczna
    rdzeń
    power transformer
    mechanical vibrations
    vibroacoustic method
    core
    Opis:
    W publikacji scharakteryzowano zaproponowaną metodykę, tzw. zmodyfikowaną metodę wibroakustyczną, oraz przedstawiono rezultaty badań uzyskane na dwóch transformatorach, jednostce typu TR 16000/110 i TORb 25000/110. Ocenę efektywności opracowanej metodyki pomiarowo – diagnostycznej przeprowadzono poprzez korelację wyników analizy czasowo – częstotliwościowej zarejestrowanych wibracji z rezultatami badań chromatograficznych (DGA) oleju elektroizolacyjnego pobranego z kadzi monitorowanych urządzeń. Analizę zarejestrowanych drgań wykonano z wykorzystaniem przekształceń STFT, CWT i DWT.
    The subject of the paper concerns evaluation of the technical condition of the power transformer magnetic circuit by measuring and analyzing vibrations recorded during switching on the transformer. This paper presents the results of technical verification of the noninvasive method used for diagnostics of transformer cores. The research on application of this method has been performed at the Institute of Power Engineering of the Opole University of Technology for several years. The paper characterizes the proposed methodology, the so-called modified vibroacoustic method, and presents the results obtained on two tested transformers, type TR 16000/110 and TORb 25000/110. Evaluation of the effectiveness of the developed methodology of diagnostic measurements was performed by correlation analysis of the time-frequency vibrations recorded with the results of chromatographic studies (DGA) of oil taken from the transformer tank. The recorded vibrations were analyzed using the transformation STFT (Short Time Fourier Transform), CWT (Continuous Wavelet Transform) and DWT (Discrete Wavelet Transform). On the basis of the results given in this paper as well as the currently conducted research work, it was found that there is a real possibility of using the developed method for noninvasive assessment of technical condition of mechanical construction of power transformer cores in operating conditions.
    Źródło:
    Pomiary Automatyka Kontrola; 2013, R. 59, nr 2, 2; 102-105
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Repeatability Estimation for Vibration Measurement Results of Power Transformer Core
    Autorzy:
    Borucki, S.
    Cichon, A.
    Skubis, J.
    Boczar, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1198972.pdf
    Data publikacji:
    2014-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    43.40.-r
    43.40.Vn
    43.58.Wc
    Opis:
    The subject matter of this paper refers to the diagnostics of a transformer core, based on measurements and analysis of vibroacoustic signals registered during their normal operation. The paper presents results of the research aimed to evaluate the repeatability of vibration measurements for power transformer core. Recording of vibroacoustic signals was performed under laboratory conditions on dry-insulated transformers. The study concerned evaluation of changes in vibroacoustic indicators of the transformer core during operation with a turned and loosened core. Conclusions from the measurement results were drawn on the basis of the parametric test of significance derived from the variance analysis for many means of single classification basing on the Fisher-Snedecor F-distribution.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 6; 1299-1302
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-14 z 14

      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