The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Michael L Leming - One of the best experts on this subject based on the ideXlab platform.
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effects of engine idling on national ambient air quality standards criteria pollutant emissions from nonroad diesel construction equipment
Transportation Research Record, 2012Co-Authors: Phil Lewis, William Rasdorf, H Frey, Michael L LemingAbstract:It is difficult to assess the effects of engine idling on air pollutant emissions from highway construction equipment because of a lack of combined activity and emissions data. A methodology is presented for quantifying the impact of idling on National Ambient Air Quality Standards criteria pollutant emissions, including nitrogen oxides (NOx), carbon monoxide (CO), hydrocarbons (HC), and particulate matter (PM). The methodology and results are based on field data collected from 35 items of nonroad diesel construction equipment. Engine idle time was quantified in terms of equipment operational efficiency (η), which was defined as the ratio of nonidle time to total equipment use time (nonidle time plus idle time). With η and the ratio of idle to nonidle emission rates (re) for each pollutant, the percentage increase in the total quantities of each pollutant emitted (NE) was calculated for each item of equipment for the observed values of η and re. Results showed that as η increased (or idle time decreased),...
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effects of engine idling on national ambient air quality standards criteria pollutant emissions from nonroad diesel construction equipment
Transportation Research Record, 2012Co-Authors: Phil Lewis, William Rasdorf, H Frey, Michael L LemingAbstract:It is difficult to assess the effects of engine idling on air pollutant emissions from highway construction equipment because of a lack of combined activity and emissions data. A methodology is presented for quantifying the impact of idling on National Ambient Air Quality Standards criteria pollutant emissions, including nitrogen oxides (NOx), carbon monoxide (CO), hydrocarbons (HC), and particulate matter (PM). The methodology and results are based on field data collected from 35 items of nonroad diesel construction equipment. Engine idle time was quantified in terms of equipment operational efficiency (η), which was defined as the ratio of nonidle time to total equipment use time (nonidle time plus idle time). With η and the ratio of idle to nonidle emission rates (re) for each pollutant, the percentage increase in the total quantities of each pollutant emitted (NE) was calculated for each item of equipment for the observed values of η and re. Results showed that as η increased (or idle time decreased),...
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impact of engine idling on fuel use and co2 emissions of nonroad diesel construction equipment
Journal of Management in Engineering, 2012Co-Authors: Phil Lewis, William Rasdorf, Michael L LemingAbstract:It is difficult to quantitatively assess the impact of engine idling on fuel use and emissions of construction equipment because of a lack of sufficient data. This paper presents a methodology for evaluating the impact of idling on fuel use and carbon dioxide ( CO2 ) emissions of diesel construction equipment. The results are based on field data collected from 34 items of equipment. Engine idle time may be quantified in terms of equipment operational efficiency ( η ), which is defined as the ratio of nonidle time to total equipment use time (nonidle time plus idle time). Using η and the ratio of idle to nonidle fuel use and CO2 emission rates ( r ), the percentage increase in the total quantities of fuel used and CO2 emitted ( NE ) were calculated for each item of equipment for values of η less than the maximum theoretical operational efficiency of 100%. Results showed that as η decreased (or idle time increased), NE increased. A mathematical model that uses η as a predictor variable was developed to esti...
Phil Lewis - One of the best experts on this subject based on the ideXlab platform.
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effects of engine idling on national ambient air quality standards criteria pollutant emissions from nonroad diesel construction equipment
Transportation Research Record, 2012Co-Authors: Phil Lewis, William Rasdorf, H Frey, Michael L LemingAbstract:It is difficult to assess the effects of engine idling on air pollutant emissions from highway construction equipment because of a lack of combined activity and emissions data. A methodology is presented for quantifying the impact of idling on National Ambient Air Quality Standards criteria pollutant emissions, including nitrogen oxides (NOx), carbon monoxide (CO), hydrocarbons (HC), and particulate matter (PM). The methodology and results are based on field data collected from 35 items of nonroad diesel construction equipment. Engine idle time was quantified in terms of equipment operational efficiency (η), which was defined as the ratio of nonidle time to total equipment use time (nonidle time plus idle time). With η and the ratio of idle to nonidle emission rates (re) for each pollutant, the percentage increase in the total quantities of each pollutant emitted (NE) was calculated for each item of equipment for the observed values of η and re. Results showed that as η increased (or idle time decreased),...
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effects of engine idling on national ambient air quality standards criteria pollutant emissions from nonroad diesel construction equipment
Transportation Research Record, 2012Co-Authors: Phil Lewis, William Rasdorf, H Frey, Michael L LemingAbstract:It is difficult to assess the effects of engine idling on air pollutant emissions from highway construction equipment because of a lack of combined activity and emissions data. A methodology is presented for quantifying the impact of idling on National Ambient Air Quality Standards criteria pollutant emissions, including nitrogen oxides (NOx), carbon monoxide (CO), hydrocarbons (HC), and particulate matter (PM). The methodology and results are based on field data collected from 35 items of nonroad diesel construction equipment. Engine idle time was quantified in terms of equipment operational efficiency (η), which was defined as the ratio of nonidle time to total equipment use time (nonidle time plus idle time). With η and the ratio of idle to nonidle emission rates (re) for each pollutant, the percentage increase in the total quantities of each pollutant emitted (NE) was calculated for each item of equipment for the observed values of η and re. Results showed that as η increased (or idle time decreased),...
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impact of engine idling on fuel use and co2 emissions of nonroad diesel construction equipment
Journal of Management in Engineering, 2012Co-Authors: Phil Lewis, William Rasdorf, Michael L LemingAbstract:It is difficult to quantitatively assess the impact of engine idling on fuel use and emissions of construction equipment because of a lack of sufficient data. This paper presents a methodology for evaluating the impact of idling on fuel use and carbon dioxide ( CO2 ) emissions of diesel construction equipment. The results are based on field data collected from 34 items of equipment. Engine idle time may be quantified in terms of equipment operational efficiency ( η ), which is defined as the ratio of nonidle time to total equipment use time (nonidle time plus idle time). Using η and the ratio of idle to nonidle fuel use and CO2 emission rates ( r ), the percentage increase in the total quantities of fuel used and CO2 emitted ( NE ) were calculated for each item of equipment for values of η less than the maximum theoretical operational efficiency of 100%. Results showed that as η decreased (or idle time increased), NE increased. A mathematical model that uses η as a predictor variable was developed to esti...
William Rasdorf - One of the best experts on this subject based on the ideXlab platform.
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effects of engine idling on national ambient air quality standards criteria pollutant emissions from nonroad diesel construction equipment
Transportation Research Record, 2012Co-Authors: Phil Lewis, William Rasdorf, H Frey, Michael L LemingAbstract:It is difficult to assess the effects of engine idling on air pollutant emissions from highway construction equipment because of a lack of combined activity and emissions data. A methodology is presented for quantifying the impact of idling on National Ambient Air Quality Standards criteria pollutant emissions, including nitrogen oxides (NOx), carbon monoxide (CO), hydrocarbons (HC), and particulate matter (PM). The methodology and results are based on field data collected from 35 items of nonroad diesel construction equipment. Engine idle time was quantified in terms of equipment operational efficiency (η), which was defined as the ratio of nonidle time to total equipment use time (nonidle time plus idle time). With η and the ratio of idle to nonidle emission rates (re) for each pollutant, the percentage increase in the total quantities of each pollutant emitted (NE) was calculated for each item of equipment for the observed values of η and re. Results showed that as η increased (or idle time decreased),...
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effects of engine idling on national ambient air quality standards criteria pollutant emissions from nonroad diesel construction equipment
Transportation Research Record, 2012Co-Authors: Phil Lewis, William Rasdorf, H Frey, Michael L LemingAbstract:It is difficult to assess the effects of engine idling on air pollutant emissions from highway construction equipment because of a lack of combined activity and emissions data. A methodology is presented for quantifying the impact of idling on National Ambient Air Quality Standards criteria pollutant emissions, including nitrogen oxides (NOx), carbon monoxide (CO), hydrocarbons (HC), and particulate matter (PM). The methodology and results are based on field data collected from 35 items of nonroad diesel construction equipment. Engine idle time was quantified in terms of equipment operational efficiency (η), which was defined as the ratio of nonidle time to total equipment use time (nonidle time plus idle time). With η and the ratio of idle to nonidle emission rates (re) for each pollutant, the percentage increase in the total quantities of each pollutant emitted (NE) was calculated for each item of equipment for the observed values of η and re. Results showed that as η increased (or idle time decreased),...
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impact of engine idling on fuel use and co2 emissions of nonroad diesel construction equipment
Journal of Management in Engineering, 2012Co-Authors: Phil Lewis, William Rasdorf, Michael L LemingAbstract:It is difficult to quantitatively assess the impact of engine idling on fuel use and emissions of construction equipment because of a lack of sufficient data. This paper presents a methodology for evaluating the impact of idling on fuel use and carbon dioxide ( CO2 ) emissions of diesel construction equipment. The results are based on field data collected from 34 items of equipment. Engine idle time may be quantified in terms of equipment operational efficiency ( η ), which is defined as the ratio of nonidle time to total equipment use time (nonidle time plus idle time). Using η and the ratio of idle to nonidle fuel use and CO2 emission rates ( r ), the percentage increase in the total quantities of fuel used and CO2 emitted ( NE ) were calculated for each item of equipment for values of η less than the maximum theoretical operational efficiency of 100%. Results showed that as η decreased (or idle time increased), NE increased. A mathematical model that uses η as a predictor variable was developed to esti...
H Frey - One of the best experts on this subject based on the ideXlab platform.
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effects of engine idling on national ambient air quality standards criteria pollutant emissions from nonroad diesel construction equipment
Transportation Research Record, 2012Co-Authors: Phil Lewis, William Rasdorf, H Frey, Michael L LemingAbstract:It is difficult to assess the effects of engine idling on air pollutant emissions from highway construction equipment because of a lack of combined activity and emissions data. A methodology is presented for quantifying the impact of idling on National Ambient Air Quality Standards criteria pollutant emissions, including nitrogen oxides (NOx), carbon monoxide (CO), hydrocarbons (HC), and particulate matter (PM). The methodology and results are based on field data collected from 35 items of nonroad diesel construction equipment. Engine idle time was quantified in terms of equipment operational efficiency (η), which was defined as the ratio of nonidle time to total equipment use time (nonidle time plus idle time). With η and the ratio of idle to nonidle emission rates (re) for each pollutant, the percentage increase in the total quantities of each pollutant emitted (NE) was calculated for each item of equipment for the observed values of η and re. Results showed that as η increased (or idle time decreased),...
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effects of engine idling on national ambient air quality standards criteria pollutant emissions from nonroad diesel construction equipment
Transportation Research Record, 2012Co-Authors: Phil Lewis, William Rasdorf, H Frey, Michael L LemingAbstract:It is difficult to assess the effects of engine idling on air pollutant emissions from highway construction equipment because of a lack of combined activity and emissions data. A methodology is presented for quantifying the impact of idling on National Ambient Air Quality Standards criteria pollutant emissions, including nitrogen oxides (NOx), carbon monoxide (CO), hydrocarbons (HC), and particulate matter (PM). The methodology and results are based on field data collected from 35 items of nonroad diesel construction equipment. Engine idle time was quantified in terms of equipment operational efficiency (η), which was defined as the ratio of nonidle time to total equipment use time (nonidle time plus idle time). With η and the ratio of idle to nonidle emission rates (re) for each pollutant, the percentage increase in the total quantities of each pollutant emitted (NE) was calculated for each item of equipment for the observed values of η and re. Results showed that as η increased (or idle time decreased),...
Adalet Oner - One of the best experts on this subject based on the ideXlab platform.
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a discrete artificial bee colony algorithm for the no idle permutation flowshop scheduling problem with the total tardiness criterion
Applied Mathematical Modelling, 2013Co-Authors: Fatih M Tasgetiren, P N Suganthan, Adalet OnerAbstract:Abstract In this paper, we present a discrete artificial bee colony algorithm to solve the no-idle permutation flowshop scheduling problem with the total tardiness criterion. The no-idle permutation flowshop problem is a variant of the well-known permutation flowshop scheduling problem where idle time is not allowed on machines. In other words, the start time of processing the first job on a given machine must be delayed in order to satisfy the no-idle constraint. The paper presents the following contributions: First of all, a discrete artificial bee colony algorithm is presented to solve the problem on hand first time in the literature. Secondly, some novel methods of calculating the total tardiness from makespan are introduced for the no-idle permutation flowshop scheduling problem. Finally, the main contribution of the paper is due to the fact that a novel speed-up method for the insertion neighborhood is developed for the total tardiness criterion. The performance of the discrete artificial bee colony algorithm is evaluated against a traditional genetic algorithm. The computational results show its highly competitive performance when compared to the genetic algorithm. Ultimately, we provide the best known solutions for the total tardiness criterion with different due date tightness levels for the first time in the literature for the Taillard’s benchmark suit.
