Filtry
wszystkich: 9068
-
Katalog
- Publikacje 7407 wyników po odfiltrowaniu
- Czasopisma 118 wyników po odfiltrowaniu
- Wydawnictwa 1 wyników po odfiltrowaniu
- Osoby 268 wyników po odfiltrowaniu
- Wynalazki 1 wyników po odfiltrowaniu
- Projekty 33 wyników po odfiltrowaniu
- Laboratoria 1 wyników po odfiltrowaniu
- Zespoły Badawcze 2 wyników po odfiltrowaniu
- Aparatura Badawcza 3 wyników po odfiltrowaniu
- Kursy Online 113 wyników po odfiltrowaniu
- Wydarzenia 44 wyników po odfiltrowaniu
- Dane Badawcze 1077 wyników po odfiltrowaniu
wyświetlamy 1000 najlepszych wyników Pomoc
Wyniki wyszukiwania dla: UAS
-
Electrocatalytic Gas Sensor with Reference Layer
PublikacjaThis paper presents studies of gas sensors prepared in ceramic technology with Nasicon as a solid electrolyte. Sensors work in the voltammetric mode thus based on the excitation of a sensor with a periodic potential signal while current response is recorded. The main aim is to investigate a Bi8Nb2O17 reference layer influence on sensor properties. Sensors I-V characteristics in different concentration of nitrogen dioxide have been...
-
Gas-steam mixture wood drying
PublikacjaBadania skuteczności suszenia wysokotemperaturowego suszenia drewna w komorze suszarniczej - wstępne wyniki.
-
Noise related to gas bottles explosions
PublikacjaModern industrialized world is in a never ending danger of accidents and catastrophes of technical nature. Some of them may involve fires and explosions of gas storage bottles or containers. Technical University of Gdansk, Poland performed numerous tests where bottles containing acetylene, oxygen, hydrogen, CO2, LPG, LNG or CNG were blown due to excessive temperature caused by fire. Although those experiments were not focused on...
-
Devices for the production of reference gas mixtures
PublikacjaFor many years there has been growing demand for gaseous reference materials, which is connected with development in many fields of science and technology. As a result, new methodological and instrumental solutions appear that can be used for this purpose. Appropriate quality assurance/quality control (QA/QC) must be used to make sure that measurement data are a reliable source of information. Reference materials are a significant...
-
Electrocatalytic gas sensor with reference layer
PublikacjaIn recent years electrochemical gas sensors based on solid state electrolytes have been intensively developed. They are easy to obtain, use and relative durable. Nasicon is one of the most promising materials, which have been used in construction of gas sensors. Most of these devices work in potentiometric or amperometric mode. However, some works are dedicated to sensors working in electrocatalytic mode. Principle of operation...
-
Materials for potentiometric electrochemical gas sensors
PublikacjaPublikacja przeglądowa na temat zasady działania oraz rodzajów czujników elektrochemicznych gazów.
-
On the selectivity of nanostructured semiconductor gas sensors
Publikacja.
-
Perforating systems in shale gas recovery
PublikacjaHydraulic fracturing is common method of shale gas recovery. Due to environmental, economical and technological problems many alternative technologies have been developed. One of the most promising group of technologies is based on perforating systems. This paper describes theoretical and practical aspects of best known technologies used to create perforations. New perforating/fracturing technologies which can replace hydraulic fracturing...
-
Stowarzyszenie "Polonia Technica" w USA
PublikacjaPrzedstawiono historię Stowarzyszenia Inżynierów i Techników Polskich "Polonia Technica" w USA oraz jego związki z Politechniką Gdańską
-
Gas chromatography-olfactometry of alcoholic beverages
PublikacjaW rozdziale 5 książki przedstawiono zastosowanie techniki chromatografia gazowa-olfaktometria (GC-O)w ustalaniu zależności między zapachem a składem chemicznym lotnej frakcji napojów alkoholowych. W pierwszej części przedstawiono zasadę techniki GC-O, procedury przygotowania próbek do analizy, metody zbierania danych oraz warunki analizy. Następnie omówiono zastosowanie techniki GC-O w analizie i ocenie jakości różnych napojów...
-
Electrocatalytic gas sensor response analysis
PublikacjaW pracy przedstawiono i porównano metody analizy odpowiedzi elektrokatalitycznych czujników gazów toksycznych. Opisane metody pozwalają na ekstrakcje z odpowiediz czujników informacji o rodzaju gazu oraz o jego stężeniu.
-
Fluctuation phenomena in semiconductor gas sensors
PublikacjaCzujniki gazu mogą być wytwarzane z cienkiej warstwy półprzewodnika, która po podgrzaniu do odpowiedniej temperatury staje się czuła na gaz. Zjawisko to jest dobrze znane i szeroko opisane w literaturze. Jako wskaźnik detekcji gazu wykorzystuje się zmianę rezystancji stałoprądowej czujnika. Zwiększenie czułości i, co najważniejsze z praktycznego punktu widzenia, selektywności dyskryminacji można uzyskać jeśli warstwa półprzewodnika...
-
Tools for signal analysis of gas sensors
PublikacjaStatystyki drugiego rzedu oraz jklasyczna analiza widmowa są zwykle stosowane do badania sygnałów losowych o rozkładzie gaussowskim. Są one jednak często nieodpowiednie w przypadku analizy niestacjonarnych sygnałów niegaussowskich. Pewne narzędzia do analizy takich sygnałów sa dostępne w bibliotekach środowiska MATLAB. Zostały one wykorzystane do do analizy fluktuacji sygnałów czujników gazów. W artykule przedstawiono system do...
-
Gas sensors based on superionic conductors
PublikacjaW pracy przedstawiono przegląd rozwiązań elektrochemicznych czujników gazów na bazie elektrolitów stałych.
-
Quantum dots in gas sensing a review
PublikacjaAir pollution becomes an increasing problem in the recent years. There is a need to develop more sensitive gas sensors. Much effort has been performed to develop different types of gas sensors, such as electrochemical sensors or polymer sensors. One of the most promising approaches to improve sensors performance is the application of the nanostructures as sensing materials. State of the art of quantum...
-
Hydrogen sulphide electrocatalytic gas sensor
PublikacjaIn this article measurement results of the electrocatalytic gas sensor in different concentrations of hydrogen sulphide are presented. Working principle of such sensor is based on electric current acquisition, while voltage ramp is applied to the sensor. During voltage sweep oxidation and reduction reactions occurs on the sensor electrodes. Obtained current-voltage plot has unique shape connected...
-
Hydraulic impact in a long gas-pipelines
PublikacjaPrzedstawiono model hydraulicznej linii długiej rurociągu gazowego. Obliczenia numeryczne dotyczą procesów dynamicznych w rurociągu gazowym przy nagłym zamknięciu zaworu na końcu rurociągu. Badano wpływ współczynnika izentropy przesyłanego gazu na wielkość uderzenia hydraulicznego oraz wpływ inercyjności zaworu na możliwość łagodzenia uderzenia hydraulicznego.
-
Gas turbine: advanced marine propulsion.
PublikacjaPrzedstawiono rys historyczny rozwoju okrętowych turbin gazowych. Omówiono główne problemy zastosowania turbiny gazowej jako głównego silnika okrętowego i współczesne tendencje rozwoju tego napędu.
-
Solid-state electrochemical gas sensors
PublikacjaW pracy przedstawiono budowę i zasadę działania wybranych typów elektrochemicznych czujników gazów zbudowanych na bazie elektrolitów stałych.
-
Archaeologische Mitteilungen aus Iran und Turan
Czasopisma -
Alambique. Didáctica de las ciencias experimentales
Czasopisma -
Atalanta-Revista de las Letras Barrocas
Czasopisma -
International Journal of Oil Gas and Coal Technology
Czasopisma -
Revista Colombiana de las Artes Escenicas
Czasopisma -
Revista Paraguay desde las Ciencias Sociales
Czasopisma -
U.S. Geological Survey Scientific Investigations Report
Czasopisma -
Revista de Historia de las Prisiones
Czasopisma -
U.S. Geological Survey Scientific Investigations Map
Czasopisma -
U.S. Geological Survey Open-File Report
Czasopisma -
Exhaust gas temperature measurements in diagnostic examination of naval gas turbine engines. Part II. Unsteady processes
PublikacjaThe second part of the article presents the results of operating diagnostic tests of a two- and three-shaft engine with a separate power turbine during the start-up and acceleration of the rotor units. Attention was paid to key importance of the correctness of operation of the automatic engine load control system, the input for which, among other signals, is the rate of increase of the exhaust gas flow temperature. The article...
-
Fluctuation enhanced gas sensing with WO3-based nanoparticle gas sensors modulated by UV light at selected wavelengths
PublikacjaThe sensitivity and selectivity of WO3-based gas sensors can be enhanced by UV-irradiation-induced modulation, especially if different wavelengths are employed. We used fluctuation-enhanced gas sensing, based on measurements of resistance fluctuations in the gas sensor, to study the effects of such modulation on the noise intensity for ambient atmospheres of synthetic air without and with additions of small amounts of ethanol,...
-
A comparative study of pentanol (C5 alcohol) and kerosene blends in terms of gas turbine engine performance and exhaust gas emission
PublikacjaThe growing demand for sustainable and clean energy sources provides the incentive for the development of alternative fuels. Simultaneously, the development of gas turbine technologies with flexible fuel supply systems enables the use of alternative non-fossil fuels that can play key roles in contributing to global efforts in meeting emissions targets. This paper presents the current state of knowledge on the production and potential...
-
Real-time working gas recognition system based on the array of semiconductor gas sensors and portable computer Raspberry PI
PublikacjaThe gas-analyzing systems based on the array of partially selective gas sensors and pattern-recognition techniques are potentially fast and low-cost alternative for other devices, like gas analysers. They give the possibility of recognition the type and the concentration of measured volatile compounds in their working environment. In this work we present the implementation of gas recognition system, in which the signals from an...
-
Exhaust gas temperature measurements in diagnostic examination of naval gas turbine engines. Part I: Steady-state processes
PublikacjaThe article presents a possible method of detecting failures in the flow section and supply system of a naval gas turbine engine based on the exhaust gas temperature measured behind the gas generator. This temperature is a basic diagnostic parameter use for evaluating the technical state of the turbine engine in operation, and is monitored during engine start-ups, accelerations and decelerations of rotor units, and steady-load...
-
Exhaust gas temperature measurements in diagnostic examination of naval gas turbine engines. Part III. Diagnostic and operating tolerances
PublikacjaThe third part of the article presents a method for detecting failures of the automatic engine control system with the aid of an exhaust gas temperature setter, specially designed and machined for this purpose. It also presents a procedure of identifying the operating tolerances and determining the diagnostic tolerances for the exhaust gas temperature recorded in the naval turbine engine during the start-up and acceleration processes....
-
Decentralized control of a UPS systems operating in parallel
Publikacja -
Security Assessment of a Turbo-Gas Power Plant
PublikacjaCritical infrastructures are exposed to new threats due to the large number of vulnerabilities and architectural weaknesses introduced by the extensive use of information and communication technologies. This paper presents the results of an exhaustive security assessment for a turbo-gas power plant.
-
Kosmiczny projekt Politechniki Gdańskiej w USA
PublikacjaW marcu wynieśli eksperyment w przestrzeń kosmiczną, teraz studenci Politechniki Gdańskiej prezentują wyniki na międzynarodowej konferencji International Astronautical Congress 2019 w Waszyngtonie.
-
Software development methodologies and practices in start-ups
PublikacjaSoftware start-ups are aiming to develop cutting-edge software products under highly uncertain conditions, overcoming fast-growing markets under multiple influences. This study aims to identify and analyse the existing scientific literature regarding software development methodologies and practices in software start-ups published between January 2006 and December 2017 using the systematic mapping study. The results identified 37...
-
Exhaled breath analysis by resistive gas sensors
PublikacjaBreath analysis has attracted human beings for centuries. It was one of the simplest methods to detect various diseases by using human smell sense only. Advances in technology enable to use more reliable and standardized methods, based on different gas sensing systems. Breath analysis requires the detection of volatile organic compounds (VOCs) of the concentrations below individual ppm (parts per million). Therefore, advanced detection...
-
Dissociative ionization dynamics of dielectric gas C3F7CN
PublikacjaFluoronitrile C3F7CN is a promising candidate for the replacement of SF6 dielectric gas in high-voltage insulation. We present a combined experimental and theoretical study on its ionization dynamics probed in the 0-100 eV energy range. We exploited the total ion collection technique to determine the absolute ionization cross section, mass spectrometry to determine the fragment branching ratios and ab initio nonadiabatic molecular...
-
UAV IN TODAYS PHOTOGRAMMETRY – APPLICATION AREAS AND CHALLENGES
PublikacjaThere a few important factors, that nowadays, unmanned aerial vehicles (UAV) are used by wider community, and for cases and applications, that cannot be performed never before. Small UAVs, as a photogrammetry measurement tool provide flexibility, reliability, are safe and easy to use, can be deployed in minutes, initial measurement can be delivered yet on the field, and final accurate measurements are calculated in a very short...
-
Roadmap on dynamics of molecules and clusters in the gas phase
PublikacjaThis roadmap article highlights recent advances, challenges and future prospects in studies of the dynamics of molecules and clusters in the gas phase. It comprises nineteen contributions by scientists with leading expertise in complementary experimental and theoretical techniques to probe the dynamics on timescales spanning twenty orders of magnitudes, from attoseconds to minutes and beyond, and for systems ranging in complexity...
-
Polypyrrole based gas sensor for ammonia detection
PublikacjaThe nature of polypyrrole response to toxic gases does not allow using the sensor in a conventional way. The main aim of this study is to acquire the information about the concentration using different approaches: a linear approximation, a non-linear approximation and a tangent method. In this paper a two-steps procedure for sensor response measurements has been utilized. Polypyrrole films were electrochemically synthesized on...
-
Application of Ionic Liquids in Amperometric Gas Sensors
PublikacjaThis article presents an analysis of available literature data on metrological parameters of the amperometric gas sensors containing ionic liquids as an electrolyte. Four mechanism types of signal generation in amperometric sensors with ionic liquid are described. Moreover, this article describes the influence of selected physico-chemical properties of the ionic liquids on the metrological parameters of these sensors. Some metrological...
-
An electronic nose for quantitative determination of gas concentrations
PublikacjaThe practical application of human nose for fragrance recognition is severely limited by the fact that our sense of smell is subjective and gets tired easily. Consequen tly, there is considerable need for an instrument that can be a substitution of the human sense of smell. Electronic nose devices from the mid 1980s are used in growing number of applications. They comprise an array of several electrochemical gas sensors...
-
Dopants and gas modifiers in ion mobility spectrometry
PublikacjaThe ion mobility techniques, including the most commonly used drift-tube ion mobility spectrometry (IMS) and differential mobility spectrometry (DMS), are used successfully for the detection of a wide range of organic compounds in the gas phase. In order to improve detection quality, admixtures are added to gas streams flowing through the detector. Dopants mostly prevent the ionization of interfering chemicals however, better detection...
-
Chromatographic Examinations in the Gas Network Odourised by Tetrahydrothiophene
Publikacja -
Shooting Gas Cylinders to Prevent Their Explosion in Fire
PublikacjaGas cylinders in general, and particularly cylinders containing acetylene, constitute a great potential danger to fire and rescue services involved in salvage operations. Experiments show that gas cylinders with acetylene, oxygen, hydrogen, CNG, LPG or CO2 may blow after short exposition to heat with very destructive effect as fragments of blown cylinder may fly even several hundred meters. In the case of acetylene the explosion...
-
Magnetoacoustic heating in a quasi-isentropic magnetic gas
PublikacjaThe nonlinear heating of a plasma which associates with the transfer of energy of magnetoacoustic waves into that of the entropy mode, is analytically studied. A plasma is uniform and motionless at equilibrium. Perturbations in a plasma are described by a system of ideal magnetohydrodynamic equations. The equilibrium straight magnetic strength and the wave vector form a constant angle which varies from 0 to π/2. There exist four...