Results 1 to 10 of about 454,529 (335)
Asymptotically optimal idling in the GI/GI/N+GI queue [PDF]
Operations Research Letters, 2022 We formulate a control problem for a GI/GI/N+GI queue, whose objective is to trade off the long-run average operational costs (i.e., abandonment costs and holding costs) with server utilization costs. To solve the control problem, we consider an asymptotic regime in which the arrival rate and the number of servers grow large.
Yueyang Zhong +2 more
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Open Engineering, 2021 National Implementation Plans (NIP) in regard hydrogenation motor transport are in place in European Union (EU) countries, e.g. Germany, France or Belgium, Denmark, Netherlands. Motor transport hydrogenization plans exist in the Japan and USA.
Gis Wojciech, Gis Maciej
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Statistical analysis and predicting spatio-temporal variations of urban heat islands using remote sensing data [PDF]
علوم محیطی, 2023 Introduction: The urban heat island (UHI) as a climatic effect of urbanization can negatively impact the flora and fauna involved in urban and suburban ecosystems, the presence of pollutants, air quality, energy and water consumption, as well as human ...
Keyvan Ezimand +3 more
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Exhaust emissions of buses LNG and Diesel in RDE tests
Open Engineering, 2021 The article compares the exhaust emissions in road conditions of city buses: LNG and Diesel. Both buses met the Euro VI exhaust emission norm. The current strong drive to diversify fuels in Poland and the creation of a large gas port in Świnoujście for ...
Gis Maciej, Pielecha Jacek, Gis Wojciech
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Alternative Exhaust Emission Factors from Vehicles in On-Road Driving Tests
Energies, 2021 On-road driving tests are performed to determine the emission of harmful exhaust compounds from vehicles. These primarily include carbon dioxide, nitrogen oxides, and particle number.
Wojciech Gis +3 more
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The use of the mild hybrid system in vehicles with regard to exhaust emissions and their environmental impact [PDF]
Archives of Transport, 2020 Pollution of the environment is a global phenomenon. The lack of specific actions to reduce environmental pollution can lead to an increase in the average temperature of the Earth's air and to global consequences.
Jacek Pielecha, Maciej Gis
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Particle Number Emission from Vehicles of Various Drives in the RDE Tests
Energies, 2022 In this study, the authors assessed the road emissions of several passenger cars using specialised instrumentation, of the PEMS type, to measure particle number emissions in real traffic conditions.
Jacek Pielecha +3 more
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Ammonia Emissions in SI Engines Fueled with LPG
Energies, 2021 Ammonia is a toxic exhaust component emitted from internal combustion engines. Both pure ammonia and the products of its reaction with nitrogen and sulfur compounds, being the source of particulate matter (PM) emissions, are dangerous for human health ...
Andrzej Żółtowski, Wojciech Gis
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Perfect sampling of GI/GI/c queues [PDF]
Queueing Systems, 2018 We introduce the first class of perfect sampling algorithms for the steady-state distribution of multi-server queues with general interarrival time and service time distributions. Our algorithm is built on the classical dominated coupling from the past protocol. In particular, we use a coupled multi-server vacation system as the upper bound process and
Jose Blanchet, Jing Dong, Yanan Pei
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The Issues of the Air-Fuel Ratio in Exhaust Emissions Tests Carried out on a Chassis Dynamometer
Energies, 2021 Vehicle exhaust emission tests use exhaust sampling systems that dilute the exhaust gas with ambient air. The dilution factor DF is calculated assuming that the combustion is complete, and that the engine is operated at a stoichiometric air-fuel ratio ...
Wojciech Gis, Sławomir Taubert
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