Results 11 to 20 of about 158,735 (302)

Pollutant Emissions in Ports: A Comprehensive Review [PDF]

open access: yesInfrastructures, 2021
In recent decades, maritime transport demand has increased along with world population and global trades. This is associated with higher pollution levels, including the emissions of GHG and other polluting gases.
Salvatore Barberi   +3 more
doaj   +4 more sources

Heterogeneity of environmental protection law’s impact on firms’ pollutant discharge

open access: yesFrontiers in Environmental Science, 2023
In 2015, China revised its Environmental Protection Law to strengthen regulations on firms’ pollution discharge. However, the efficacy of this law in protecting the environment remains unclear.
Wenyu Li   +3 more
doaj   +1 more source

The Issues of the Air-Fuel Ratio in Exhaust Emissions Tests Carried out on a Chassis Dynamometer

open access: yesEnergies, 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
doaj   +1 more source

The effects of split direct injection on the operation of a tractor diesel engine fueled by biodiesel B20 [PDF]

open access: yesE3S Web of Conferences, 2021
The use of biodiesel-diesel blends is a current solution to some important problems, such as the depletion of oil resources, global warming, and the pollutant emissions of smoke, carbon monoxide, and hydrocarbons of diesel engines.
Niculae Andrei Laurentiu   +2 more
doaj   +1 more source

Climatological Study of Air Pollutant Emissions in Saudi Arabia

open access: yesAtmosphere, 2023
This study aims to investigate the spatio-temporal distribution, variation, abrupt change, and long-term trends of major pollutant emissions in the Kingdom of Saudi Arabia (KSA) over the period 1960–2020 using the Monitoring Atmospheric Composition and ...
Motirh Al-Mutairi   +4 more
doaj   +1 more source

new methodological framework for within-day dynamic estimation of pollutant emissions in a large congested urban network

open access: yesEuropean Journal of Transport and Infrastructure Research, 2014
This paper presents a new methodological framework to address the problem of estimating pollutant emissions for large congested urban networks in a within-day dynamic context.
Stefano Gori   +3 more
doaj   +1 more source

Estimation of Air Pollutant Emissions from Heavy Industry Sector in North Korea

open access: yesAerosol and Air Quality Research, 2023
This study aims to estimate the amount of air pollutants emitted from heavy industrial facilities in North Korea. The heavy industry sector in North Korea was classified according to the South Korean definition, and the air pollutant emissions that it ...
Young Won Lee, Yong Pyo Kim, Min Ju Yeo
doaj   +1 more source

The impact of air pollutant and methane emission controls on tropospheric ozone and radiative forcing: CTM calculations for the period 1990-2030 [PDF]

open access: yes, 2004
To explore the relationship between tropospheric ozone and radiative forcing with changing emissions, we compiled two sets of global scenarios for the emissions of the ozone precursors methane (CH4), carbon monoxide (CO), non-methane volatile organic ...
Amann, M.   +7 more
core   +4 more sources

Optimizing wavelet neural networks using modified cuckoo search for multi-step ahead chaotic time series prediction [PDF]

open access: yes, 2019
Determining the optimal number of hidden nodes and their proper initial locations are essentially crucial before the wavelet neural networks (WNNs) start their learning process.
Huda A. Majid   +6 more
core   +1 more source

Emission Standards in Air Pollution [PDF]

open access: yesAmerican Journal of Public Health and the Nations Health, 1965
AN emission standard is a limit on the amount or concentration of a pollutant emitted from a source. The concentration of pollutant in the effluent may be stated subjectively in terms of its appearance to the eye or its odor, as determined by the nose; or objectively in terms of its weight or volume.
openaire   +2 more sources

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