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Tytuł:
Stationary underwater channel experiment: Acoustic measurements and characteristics in the Bornholm area for model validations
Autorzy:
Nissen, I.
Kochańska, I.
Powiązania:
https://bibliotekanauki.pl/articles/332083.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Akustyczne
Tematy:
underwater communications
stationary time
WSSUS indication
Opis:
The underwater acoustical channel is time-variant, and even on small time scales there is often existing no ‘acoustical frozen ocean’. Popular is the use of WSSUS-channel transmission modeling (Wide-Sense Stationary Uncorrelated Scattering) for the stochastic description of bandpass signals in GSM mobile phones with moving participants; since this results in a halved number of model parameters. For underwater sound applications such as detection, navigation and communication this approach provides limited a-priori-knowledge for adaptive algorithms with moving cooperative participants. The FWG of the WTD71 is collecting phase-accurate channel measurements from different sea areas in different time and application scenarios, with moving and stationary communication nodes since 2001. This paper presents a SIMO experiment from 2010, with a high precision continuous observation period of eleven hours using two stationary bottom nodes, mostly uncoupled from the influence of surface waves and from the sea floor. Transmitter and receiver node with a distance of two nautical miles between them were stationary installed on the bottom in shallow watersin the Bornholm Basin of the Baltic Sea. The sound speed has been measured continuously in the water column with a moving measurement chain. The question for this experiment was: Is the WSSUS-property fulfilled in water, when participants communicate motionless with negligible current, bottom influence and movements of the surface? The answer is: No, not in this experiment.
Źródło:
Hydroacoustics; 2016, 19; 285-296
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Possible use of spider webs for the indication of organic road pollutants
Autorzy:
Rybak, J
Powiązania:
https://bibliotekanauki.pl/articles/125045.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
PAHs
road pollutants
spider webs
indication
Opis:
The results of the research assessing the possibility of using spider webs for the indication of organic pollutants (PAHs) in the long period of time in the air polluted with road traffic emissions are presented. It was proved that webs could be used for the indication of pollutants of this type. Because of the great availability and dense structure of webs belonging to representatives of Agelenidae family, they can serve as a very effective tool. What is more, the secluded location of webs is favorable and influences the accuracy and credibility of results, since deposited pollutants are not washed off with rain, neither are they decomposed by microorganisms or sunlight. The influence of co-existing contaminants is also minimized.
Źródło:
Journal of Ecological Engineering; 2014, 15, 3; 39-45
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Attitudes and orientation of employees in the Serbian catering industry about products with protected origin
Autorzy:
Ćirić, Miloš
Janković, Ivana
Kalenjuk, Bojana
Powiązania:
https://bibliotekanauki.pl/articles/1193367.pdf
Data publikacji:
2021
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
gastronomy
geographical indication of origin
protected products
Opis:
The subject of this paper is the knowledge and attitudes of employees in the hospitality industry about products with protected geographical origin in Serbia. In order to include these products in the gastronomic offer, data whether employees are aware of them must be obtained since they represent the main purpose of this paper. The aim of this paper is to investigate the knowledge level, awareness and attitudes of employees in catering and tourism in Serbia about the importance and the type of protected products and their representation in the gastronomic offer of Serbia. The critical review is in accord with the official regulations and guidelines under the law of the Republic of Serbia on protected products. Employees (n = 202) in restaurants on the territory of Serbia participated in the research. The data obtained by the survey were processed using descriptive statistics and presented in a table in the paper. Based on the conducted research, it was found out that the employees are familiar with the concept of protected food, but that their use is not sufficiently represented in the gastronomic offer of Serbia.
Źródło:
World Scientific News; 2021, 155; 23-35
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cognition as Orientation in the Environment (translated by Magdalena Kopczyńska)
Autorzy:
Lewicki (1960), Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/632575.pdf
Data publikacji:
2016
Wydawca:
Projekt Avant
Tematy:
cognition
indication of value
indication pointing to action
Lewicki Andrzej
Pavlov Ivan
orientation in the environment
tendency
Opis:
There is one major reason that the conception of nervous reflection cannot be directly associated with “cognition” even though it undoubtedly should be a vi- tal component of the definition of this term. Namely, reflection, understood as the creation of equivalents of external stimuli, is a process that happens not only in the brains of living creatures, but also in inanimate matter. A thermometer “reflects” changes in temperature, but we would not say that it “knows” them- it is the man who knows the temperature when using a thermometer. Reflection means cognition only when it determines offensive or defensive reactions of an organism: when it constitutes an element of the mechanism of adaptation to the environment, it enables the individual to be guided by the reflected external phenomena. [...]
Źródło:
Avant; 2016, 7, 3
2082-6710
Pojawia się w:
Avant
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Monitoring of the Influence of Landfills on the Atmospheric Air Using Bioindication Methods on the Example of the Zhytomyr Landfill, Ukraine
Autorzy:
Malovanyy, Myroslav
Korbut, Mariia
Davydova, Irina
Tymchuk, Ivan
Powiązania:
https://bibliotekanauki.pl/articles/1838295.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
landfill
landfill gas
odor
bioindication
lichen indication
lichen
Opis:
The paper presents the results of research on the implementation of monitoring of the landfills influence on the atmospheric air using bioindication methods on the example of the Zhytomyr landfill (Ukraine)–one of the typical Ukrainian landfills, which is operated with minimal environmental protection measures. A comprehensive study of atmospheric air pollution in the landfill area was carried out using a human sensor system and an integral assessment using bioindication (lichens were chosen as bioindicators). The study revealed a reliable exponential dependence for modeling the relationship between the distance from the source of gas formation (solid waste landfill in the city of Zhytomyr) and the intensity of odor. The level of atmospheric air pollution was also determined based on the assessment of the projective coverage of the tree trunk with lichens. The research revealed an exponential dependence for modeling the relationship between the distance from the landfill boundary and the total coverage of the tree trunk with lichens. The results of the analysis confirmed the correctness of the use of the aforementioned method. The relationship between the results obtained by the lichen indication method and the strength of the odor from the landfill was evaluated. Based on the results of calculating the relative values of the assessment of atmospheric air pollution by the method of coverage of the tree trunk with lichens and the strength of the odor, a regression analysis was carried out and mathematical relationships were determined, that most accurately describe the change in these indicators with distance from the landfill boundary. It is proved that both tested methods can be used in Ukrainian realities to monitor the state of atmospheric air in the area of influence of municipal landfills, depending on the purpose of research. The analysis of the research results confirmed the significance of the results of the obtained assessment of the impact of the Zhytomyr solid waste landfill on the state of atmospheric air. The materials of these studies can find further application for the formation of databases of knowledge of landfills, which will allow to develop a strategy for managing them as an object of increased environmental hazard.
Źródło:
Journal of Ecological Engineering; 2021, 22, 6; 36-49
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of application of chosen methods for tdc determination in marine diesel engines
Autorzy:
Łutowicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/245396.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
diesel engine
transport
marine diesel engine
indication
TDC
Opis:
In the operating marine diesel engines the indication diagnostics tests are usually performed through a 0.5-1.0 me ter long indication channel which delays and disfigures the pressure signal being measured. the delay depends on the engine 's speed and load. the pressure sensor itself together with an amplifler is an additional source of delay and disfigurements, so the registered pressure curve is displaced even if theTDC piston's position hadbeen estimated with the highest accuracy. when the over exploited engine is being tested the angle of delay can achieve several degrees and differ for each cylinder. in that case cylinders' load is unequal and torsional vibrations occur in the engine operation. in case when some simplifying assumptions have been adopted the part of diagnostic information is lost what could lead to a false diagnosis. in the paper the attention is focused on the mistakes which could be made in the marine diesel engine diagnostics when different TDC assessment methods are used. TDC corrections with compression pressure analysis are possible only in case when crankshaft angle position is precise. in case of measurement with constant frequency such corrections are possible only when the engine is good balanced.
Źródło:
Journal of KONES; 2009, 16, 4; 301-306
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Odczłowieczony człowiek. O dehumanizującej roli wskaźnikowania
A dehumanized man. About the dehumanizing role of indexing
Autorzy:
Szpunar, Magdalena
Powiązania:
https://bibliotekanauki.pl/articles/1811260.pdf
Data publikacji:
2019-12-30
Wydawca:
Instytut Dyskursu i Dialogu
Tematy:
dehumanizacja
depersonalizacja
wskaźnikowanie
algorytmizacja
dehumanization
depersonalization
indication
algorithmization
Opis:
Osaczające nas zewsząd procedury i algorytmizacja działania, sprawia, że procesy myślowe, czy refleksyjność, zostają wyrugowane, promując bezwzględne posłuszeństwo i poddanie się logice cywilizacji numerycznej. Liczby uznajemy za wiarygodne, miarodajne, rzetelne, a dodatkowo pozbawione ludzkiej stronniczości i interpretacji. Choć głosi się wszem i wobec zwiększający się zakres wolności i autonomiczności jednostek, mamy do czynienia z procesem przeciwnym – zniewalania jednostek procedurami, kwantyfikatorami i władzą statystyki. Brak poddania się nim grozi utratą skuteczności, o którą wielu tak zabiega, skazując jednostki na bezrefleksyjny konformizm. Nie chodzi zatem o to, aby myśleć, wręcz przeciwnie – chodzi o to, aby nie myśleć, nawykowo wykonując proceduralne wytyczne zbiurokratyzowanej do granic możliwości, odhumanizowanej maszyny. Udziwnione i sztucznie wykreowane procedury, zbliżają nas raczej do działania robotów, niż obdarzonych sprawstwem, racjonalnych podmiotów. Wartość ma zatem nie ta wiedza, która odnosi się do procesów rozumienia świata i samego siebie, ale ta, która objaśnia nam procedury, łatwo domykając niedookreślone. Podmiotowość jednostki, jej rozumienie świata – także poprzez afekty – czy samoświadomość, nie może być zastąpiona przez najbardziej wyszukane procedury algorytmiczne, które długo jeszcze pozostaną bezradne w sferze ludzkiej aksjologii.
We operate in a social reality subject to the unbearable dictate of the countability of everything. Value and meaning only has what is or can be measurable. Quantification has become our fetish without which we can not imagine life in the modern world. We are increasingly positively evaluating typically human attributes, effectively replaced by technical, dehumanized, performance-oriented social machines. The power of statistics appropriates further dimensions of human existence, and numbers become the reservoir of various social control techniques.
Źródło:
Dyskurs & Dialog; 2019, I, 2 (2); 31-40
2658-2368
2658-2406
Pojawia się w:
Dyskurs & Dialog
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Monitoring of the Influence of Landfills on the Atmospheric Air Using Bioindication Methods on the Example of the Zhytomyr Landfill, Ukraine
Autorzy:
Malovanyy, Myroslav
Korbut, Mariia
Davydova, Irina
Tymchuk, Ivan
Powiązania:
https://bibliotekanauki.pl/articles/1838381.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
landfill
landfill gas
odor
bioindication
lichen indication
lichen
Opis:
The paper presents the results of research on the implementation of monitoring of the landfills influence on the atmospheric air using bioindication methods on the example of the Zhytomyr landfill (Ukraine)–one of the typical Ukrainian landfills, which is operated with minimal environmental protection measures. A comprehensive study of atmospheric air pollution in the landfill area was carried out using a human sensor system and an integral assessment using bioindication (lichens were chosen as bioindicators). The study revealed a reliable exponential dependence for modeling the relationship between the distance from the source of gas formation (solid waste landfill in the city of Zhytomyr) and the intensity of odor. The level of atmospheric air pollution was also determined based on the assessment of the projective coverage of the tree trunk with lichens. The research revealed an exponential dependence for modeling the relationship between the distance from the landfill boundary and the total coverage of the tree trunk with lichens. The results of the analysis confirmed the correctness of the use of the aforementioned method. The relationship between the results obtained by the lichen indication method and the strength of the odor from the landfill was evaluated. Based on the results of calculating the relative values of the assessment of atmospheric air pollution by the method of coverage of the tree trunk with lichens and the strength of the odor, a regression analysis was carried out and mathematical relationships were determined, that most accurately describe the change in these indicators with distance from the landfill boundary. It is proved that both tested methods can be used in Ukrainian realities to monitor the state of atmospheric air in the area of influence of municipal landfills, depending on the purpose of research. The analysis of the research results confirmed the significance of the results of the obtained assessment of the impact of the Zhytomyr solid waste landfill on the state of atmospheric air. The materials of these studies can find further application for the formation of databases of knowledge of landfills, which will allow to develop a strategy for managing them as an object of increased environmental hazard.
Źródło:
Journal of Ecological Engineering; 2021, 22, 6; 36-49
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Właściwości stygmatu a sytuacja życiowa człowieka zagrożonego stygmatyzacją
The Properties of Stigma and the Situation of Human Life
Autorzy:
Świgost, Magdalena
Powiązania:
https://bibliotekanauki.pl/articles/913304.pdf
Data publikacji:
2017-09-15
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
stigma
assorted interaction
properties of stigma
self-indication
indicating
Opis:
It is stated that the properties of stigma have the key role in perceiving social relations and own life situation by the person who is in danger of the process of social stigma. It is ccognitively interesting how agreeing to the process of social stigma is shown in terms of difficulty that is being activated by specific feature, pressing, in exceptional sense, on seeing and controling the stigma. This article contains the theoretical analysis of the process of social stigma in relation to its chosen features. There has been done an attempt to present mutual assorted interaction with the influence of blocking predicators or those restoring the process of social self-indicating and indicating.
Źródło:
Studia Edukacyjne; 2017, 45; 329-345
1233-6688
Pojawia się w:
Studia Edukacyjne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metoda weryfikacji poprawności wskazań mierników THD
Verification of the indication correctness of total harmonic distortion meters
Autorzy:
Wojturski, J.
Powiązania:
https://bibliotekanauki.pl/articles/156416.pdf
Data publikacji:
2008
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
współczynnik zawartości harmonicznych
weryfikacja poprawności wskazań miernika
wzorzec
non-linear distortion
total harmonic distortion factor
verification of instrument's indication
verification of instrument's indication correctness
standard
Opis:
W artykule opisano metodę sprawdzania dokładności wskazań mierników zawartości harmonicznych za pomocą sygnału napięciowego zawierającego wzorcową, ściśle określoną wartość współczynnika zawartości harmonicznych (THD). Wyznaczono zależność wartości THD oraz jego niepewności od kształtu trójkątnego sygnału napięciowego o zmiennej symetrii. Przedstawiono wyniki sprawdzenia właściwości metrologicznych miernika zniekształceń nieliniowych PMZ-8A na wybranym zakresie pomiarowym. Zweryfikowano dokładność zaproponowanej metody.
In the article, method of total harmonic distortion meters accuracy verification, by the use of voltage signal with standard, exactly defined, value of total harmonic distortion (THD) factor was described. Dependence of THD factor value and its uncertainty as the relationship of triangle signal shape with changing symmetry was calculated. Results of metrological properties verification for PMZ-8A non-linear distortion meter on selected measuring range were shown. Accuracy of the proposed method was verified.
Źródło:
Pomiary Automatyka Kontrola; 2008, R. 54, nr 1, 1; 15-17
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An analysis of practices of monitoring the accuracy and reliability of compasses on modern merchant ships
Autorzy:
Lushnikov, E.
Pleskacz, K.
Powiązania:
https://bibliotekanauki.pl/articles/135629.pdf
Data publikacji:
2016
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
magnetic compass
gyrocompass monitoring
compass indication monitoring
international regulations
accuracy
reliability
Opis:
This article examines the current state of practices concerning the monitoring of the accuracy and reliability of compasses on modern ships in the global fleet. The author analyzes personally detected, bizarre, but commonly used practices that may indirectly lead to hazards to human life, and impose a serious risk of marine environmental pollution. The author indicates probable reasons for the present state, and proposes directions, resources and methods for rectifying the situation. The problems presented, which represent the results of a broad study, call for decisive solutions in such areas as technology, education, law, and morality.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2016, 45 (117); 174-180
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badanie procesu sprężania dla potrzeb diagnostyki okrętowych tłokowych silników spalinowych
Examination of the Combustion Process of a Marine Diesel Engine for Diagnostic Purposes
Autorzy:
Korczewski, Z.
Łutowicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/359317.pdf
Data publikacji:
2004
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
marine engines
diagnosis
pressure indication
compression
TDC
EXPLO-SHIP 2004
Opis:
Omówiono sposób aproksymacji funkcją wykładniczą wyników badania procesu sprężania czynnika roboczego w cylindrach okrętowego tłokowego silnika spalinowego Sulzer 6AL20/24, wyposażonego w czujnik ciśnienia umieszczony w głowicy. Daje to możliwość wyznaczenia położenia GMP, ciśnienia początkowego i ciśnienia sprężania wtedy, gdy zapłon następuje przed GMP.
The paper discusses a method of an approximation of the results of the compression process examined on 6AL20/24 Sulzer engine cylinders. The approximation has been carried out by means of an exponential function. The method allows to determine the TDC position, initial pressure as well as compression pressure when the ignition comes before TDC.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2004, 1 (73); 355-367
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bioaccumulative and bioindicative role of fungi in the environment
Bioakumulacyjna i bioindykacyjna rola grzybów w środowisku
Autorzy:
Moliszewska, E.
Dołhańczuk-Śródka, A.
Ziembik, Z.
Maculewicz, D.
Nagrodzka, K.
Powiązania:
https://bibliotekanauki.pl/articles/126928.pdf
Data publikacji:
2015
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
mushrooms
radionuclides
environmental pollution indication
grzyby
radionuklidy
indykacja zanieczyszczeń środowiska
Opis:
Mycelial construction of mushrooms is considered as a good biomass for heavy metals binding as well as lots of elements, including toxic and radioactive ones. Between various fungi known to bind heavy metals, mycelium of Pleurotus spp. can be used in Cd indication and accumulation, by means of fungal biomass. In this work possible role of Pleurotus ostreatus in accumulation of radionuclides is presented. This is important because this fungus is one of broadly cultivated mushrooms, and it can grow as saprobic organism on various substrates. Naturally occurring fruiting bodies of P. ostreatus were used in studies as a potential marker of atmospheric radioactive pollution. The samples of fruiting bodies in different age (young, mature and old) were collected in the center of Opole. Measurements of the gamma radionuclides activity concentration in dried samples were carried out by means of a gamma-spectrometer with a germanium detector HPGe (Canberra) of high resolution. Potassium concentration in fruiting bodies was similar in each sample, though it was the lowest in the young specimen. Activity concentration of Cs-137 was also related with the age of the mushroom. The biggest concentration was determined in old specimen, while in the young and mature ones it was similar. In the mature and old mushrooms activity concentration of Pb-210 was lower than minimum detectable activity. Pb-212 was determined only in fruiting bodies of old specimen
Grzybnia, szczególnie grzybów wielkoowocnikowych, dzięki zdolności do akumulowania metali ciężkich stanowi potencjalne źródło informacji o zanieczyszczeniu środowiska. Wśród nich należy wymienić boczniaka (Pleurotus osteratus), grzyba zarówno uprawnego, jak i występującego naturalnie. W pracy wykonano analizę zdolności bioindykacyjnych i biokumulacyjnych tego gatunku w stosunku do izotopów gamma-promieniotwórczych. Próbki P. osteratus w różnym wieku (młode, dojrzałe, starzejące) zebrano w naturalnym stanowisku, w centrum Opola. Aktywności izotopu K-40 były podobne we wszystkich badanych próbkach, przy czym najniższa koncentracja tego izotopu została stwierdzona w najmłodszych owocnikach. Izotop Cs-137 najliczniej występował w najstarszych owocnikach. Radioizotop Pb-210 znaleziono w młodych owocnikach, a izotop Pb-212 stwierdzono w starych owocnikach
Źródło:
Proceedings of ECOpole; 2015, 9, 1; 117-123
1898-617X
2084-4557
Pojawia się w:
Proceedings of ECOpole
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bioindication of megalopolis park ecosystems under aerotechnogenic loading
Autorzy:
Miroshnyk, N.
Grabovska, T.
Mazura, M.
Teslenko, I.
Powiązania:
https://bibliotekanauki.pl/articles/2106656.pdf
Data publikacji:
2022
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
air pollution
green infrastructure
hazard index
pollen indication
traffic
Ukraine
Opis:
This study focuses on the influence of motor transport on various indicators of park ecosystems and Taraxacum officinale Web., as well as on their applicability to the bioindication of the urban environments in the largest megalopolis of Ukraine, namely, Kyiv. Our investigations were carried out in 14 park ecosystems exposed to different levels of aerotechnogenic loading: low pollution level in Pushcha-Vodytsya (park) and outskirts, average pollution level alongseven roads with medium traffic and high pollution level along eight highways. Pollen indication, integration and statistical methods were used to identify the most sensitive indicators of the impact of air pollutants. The aim is to assess the impact of vehicle emissions on the state of park ecosystems in the metropolis using bioindication and GIS technologies. The effects of air pollution on green infrastructure at the level of cells, organisms, groups and ecosystems in time and space are revealed. Under the influence of aerotechnogenic pollution, there is a deterioration of trees, their drying, defoliation of crowns and deterioration of integral indicators of park ecosystems. Using QGIS (Free open source geographic information system, version 3.12.3 „București”, May 15, 2020), we have created maps for the spread of air pollutants. The highest levels of air pollution and damage to parks were concentrated in the central part of the city with dense buildings and near heavy traffic roads. The average daily maximum allowable concentration (MAC) of phytotoxicants exceeded 1.5 MACa.d. and depended on the terrain and directions of the prevailing winds. We registered degradation of the megalopolis ecological state by 19.3% for 7 years.
Źródło:
Folia Forestalia Polonica. Series A . Forestry; 2022, 64, 1; 15-37
0071-6677
Pojawia się w:
Folia Forestalia Polonica. Series A . Forestry
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Acquisition of diagnostic information from the indicator diagrams of marine engines using the electronic indicators
Autorzy:
Polanowski, S.
Pawletko, R.
Powiązania:
https://bibliotekanauki.pl/articles/246036.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
marine engines
engine indication
angular axis
pressure sensors
TDC
heat release characteristics
Opis:
The paper analyzes the factors influencing the quantity and quality of diagnostic information obtained by engine indication with electronic indicators and pressures analyzers. Amount of information obtained virtually unchanged since the advent of the first construction pressure analyzers produced by Autronica and ABB Company. In many cases, the value of the maximum combustion and compression pressures, can be measured using these devices with sufficient accuracy and reliability, is if ignition occurs after piston TDC. Determination of the mean indicated pressure, compression ratio and heat release characteristics required to develop a method of TDC determination on the indicator diagrams, generate reliable angular axes in real time and pressure sensors of sufficient accuracy. It should be noted that in the latest solution of ABB system, a correction of thermodynamic loss angle and combustion pressure sensors of high accuracy were introduced. For marine diesel engines diagnosis, the pressure sensor measuring sustainability is important because of the ability to create trends of specific diagnostic parameters, which may constitute an additional, important source of diagnostic information. The paper presents an overview of currently available pressure sensors that can be used during marine engines indication. Most important issues related to the pressure measurement on indicator valves were characterized. An assessment of the gas channels and the quality of the angular axis impact for the parameters of indicator graphs was done.
Źródło:
Journal of KONES; 2011, 18, 3; 359-366
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 47

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