TY  - JOUR
A1  - Abdel-Aziz, A M
A1  - Frey, H C
T1  - Development of hourly probabilistic utility NOx emission inventories using time series techniques: Part II—multivariate approach.
Y1  - 2003/12/
N1  - R826766
JF  - ATMOSPHERIC ENVIRONMENT
J1  - ATMOS ENVIRON
J2  - Atmos.Environ.
VL  - 37
IS  - 38
SP  - 5391
EP  - 5401
ER  - 


TY  - JOUR
A1  - Abdel-Aziz, A 
A1  - Frey, H C
T1  - Development of hourly probabilistic utility NOx emission inventories using time series techniques: Part I—univariate approach.
Y1  - 2003/12/
N1  - R826766
JF  - ATMOSPHERIC ENVIRONMENT
J1  - ATMOS ENVIRON
J2  - Atmos.Environ.
VL  - 37
IS  - 38
SP  - 5379
EP  - 5389
ER  - 


TY  - JOUR
A1  - Abdel-Aziz, A 
A1  - Frey, H C
T1  - Quantification of hourly variability in NOx emissions for baseload coal-fired power plants.
Y1  - 2003/11/
N1  - R826766
JF  - JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION
J1  - J AIR WASTE MANAGE
VL  - 53
IS  - 11
SP  - 1401
EP  - 1411
ER  - 


TY  - JOUR
A1  - Abdel-Aziz, A 
A1  - Frey, H C
T1  - Propagation of uncertainty in hourly utility NOx emissions through a photochemical grid air quality model: a case study for the Charlotte, NC, modeling domain.
Y1  - 2004/04/1
N1  - R826766
JF  - ENVIRONMENTAL SCIENCE & TECHNOLOGY
J1  - ENVIRON SCI TECHNOL
J2  - Enviornmenal Research
J3  - ENVIRONMENTAL SCIENCE & TECHNOLOGY
VL  - 38
IS  - 7
SP  - 2153
EP  - 2160
ER  - 


TY  - JOUR
A1  - Frey, H C
A1  - Zheng, J 
T1  - Probabilistic analysis of driving cycle-based highway vehicle emission factors.
Y1  - 2002/12/1
N1  - R826766
JF  - ENVIRONMENTAL SCIENCE & TECHNOLOGY
J1  - ENVIRON SCI TECHNOL
J2  - Enviornmenal Research
J3  - ENVIRONMENTAL SCIENCE & TECHNOLOGY
VL  - 36
IS  - 23
SP  - 5184
EP  - 5191
ER  - 


TY  - JOUR
A1  - Frey, H C
A1  - Zheng, J Y
T1  - Quantification of variability and uncertainty in air pollutant emission inventories: method and case study for utility NOx emissions.
Y1  - 2002/09/
N1  - R826766
JF  - JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION
J1  - J AIR WASTE MANAGE
VL  - 52
IS  - 9
SP  - 1083
EP  - 1095
ER  - 


TY  - JOUR
A1  - Frey, H C
A1  - Bammi, S 
T1  - Quantification of variability and uncertainty in lawn and garden equipment NOx and total hydrocarbon emission factors.
Y1  - 2002//
N1  - R826766
JF  - JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION
J1  - J AIR WASTE MANAGE
VL  - 52
IS  - 4
SP  - 435
EP  - 448
ER  - 


TY  - JOUR
A1  - Frey, H C
A1  - LI, S 
T1  - Methods for quantifying variability and uncertainty in AP-42 emission factors: case studies for natural gas-fueled engines.
Y1  - 2003/12/
N1  - R826790
N1  - R826766
JF  - JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION
J1  - J AIR WASTE MANAGE
VL  - 53
IS  - 12
SP  - 1436
EP  - 1447
ER  - 


TY  - JOUR
A1  - Frey, H C
A1  - Bammi, S 
T1  - Probabilistic nonroad mobile source emission factors.
Y1  - 2003/02/
N1  - R826790
N1  - R826766
JF  - JOURNAL OF ENVIRONMENTAL ENGINEERING
VL  - 129
IS  - 2
SP  - 162
EP  - 168
ER  - 


TY  - JOUR
A1  - Zhao, Y 
A1  - Frey, H C
T1  - Quantification of variability and uncertainty for censored data sets and application to air toxic emission factors.
Y1  - 2004/09/
N1  - R826790
N1  - R826766
JF  - RISK ANALYSIS
J1  - RISK ANAL
VL  - 24
IS  - 4
SP  - 1019
EP  - 1034
ER  - 


TY  - JOUR
A1  - Zheng, J 
A1  - Frey, H C
T1  - Quantification of variability and uncertainty using mixture distributions: evaluation of sample size, mixing weights, and separation between components.
Y1  - 2004/06/
N1  - R826790
N1  - R826766
JF  - RISK ANALYSIS
J1  - RISK ANAL
VL  - 24
IS  - 3
SP  - 553
EP  - 571
ER  - 


TY  - CONF
A1  - Abdel-Aziz, A 
A1  - Frey, H C
T1  - Quantification of hourly variability in hourly activity and NOx emissions for baseload coal-fired power plants.
N1  - R826766
ER  - 


TY  - CONF
A1  - Bammi, S 
A1  - Frey, H C
T1  - Quantification of variability and uncertainty in lawn and garden equipment NOx and total hydrocarbon emission factors.
N1  - R826766
ER  - 


TY  - CONF
A1  - Frey, H C
A1  - Louglin, D 
A1  - Houyoux, M 
T1  - Quantification of variability and uncertainty in emissions estimation
Y1  - 2001/02/15
N1  - R826766
ER  - 


TY  - CONF
A1  - Frey, H C
A1  - Zheng, J 
T1  - Method for development of probabilistic emission inventories: example case study for utility NOx emissions.
Y1  - 2002//
N1  - R826766
ER  - 


TY  - CONF
A1  - Frey, H C
A1  - Li, S 
T1  - Methods for quantifying variability and uncertainty in AP-42 emission factors: case studies for natural gas-fueled engines.
Y1  - 2002//
N1  - R826766
ER  - 


TY  - CONF
A1  - Frey, H C
A1  - Bammi, S 
T1  - Quantification of variability and uncertainty for selected nonroad mobile source emission factors.
Y1  - 2002//
N1  - R826766
ER  - 


TY  - CONF
A1  - Frey, H C
A1  - Zhao, Y 
T1  - Quantification of variability and uncertainty in air toxic emission factors when data contain non-detected values.
Y1  - 2002//
N1  - R826766
ER  - 


TY  - CONF
A1  - Frey, H C
A1  - Unal, A 
A1  - Chen, J 
T1  - Evaluation and recommendation of a modal method for modeling vehicle emissions.
Y1  - 2003//
N1  - R826766
ER  - 


TY  - CONF
A1  - Frey, H C
T1  - Evaluation of an approximate analytical procedure for calculating uncertainty in the greenhouse gas version of the multi-scale motor vehicle and equipment emissions system.
N1  - R826766
ER  - 


TY  - CONF
A1  - Frey, H C
A1  - Unal, A 
A1  - Chen, J 
A1  - Li, S 
T1  - Modeling mobile source emissions based upon in-use and second-by-second data: development of conceptual approaches for EPA's new MOVES model.
N1  - R826766
ER  - 


TY  - CONF
A1  - Frey, H C
A1  - Bharvirkar, R 
A1  - Zheng, J 
T1  - Quantification of variability and uncertainty in emission factors.
N1  - R826766
ER  - 


TY  - CONF
A1  - Frey, H C
A1  - Zheng, J 
T1  - Quantification of variability and uncertainty in emission inventories: a prototype software tool with application to utility NOx emissions.
N1  - R826766
ER  - 


TY  - CONF
A1  - Frey, H C
T1  - Quantification of variability and uncertainty in emissions of urban air toxics and ozone precursors
N1  - R826790
N1  - R826766
ER  - 


TY  - CONF
A1  - Frey, H C
A1  - Li, S 
T1  - Quantification of variability and uncertainty in stationary natural gas-fueled internal combustion engine NOx and total organic compounds emission factor.
N1  - R826766
ER  - 


TY  - CONF
A1  - Houyoux, M 
A1  - Loughlin, D H
A1  - Holland, A P
A1  - Frey, H C
A1  - Abdel-Aziz, A 
T1  - Design, application, and recommendations for including inventory uncertainties in emission inventory preparation for modeling.
Y1  - 2003//
N1  - R826766
ER  - 


TY  - CONF
A1  - Li, S 
A1  - Frey, H C
T1  - Methods and example for development of a probabilistic per-capita emission factor for VOC emissions from consumer/commercial product use.
N1  - R826766
ER  - 


TY  - CONF
A1  - Zheng, J 
A1  - Frey, H C
T1  - Development of a software module for statistical analysis of variability and uncertainty.
N1  - R826766
ER  - 


TY  - CONF
A1  - Zheng, J 
A1  - Frey, H C
T1  - Quantitative analysis of variability and uncertainty in emission estimation: an illustration of methods using mixture distributions.
N1  - R826766
ER  - 


TY  - CONF
A1  - Zheng, J 
A1  - Frey, H C
T1  - Windows-based software implementation and uncertainty analysis of the EPA SHEDS/Pesticides model.
N1  - R826766
ER  - 


TY  - CONF
A1  - Bammi, S 
A1  - Frey, H C
T1  - Quantification of variability and uncertainty in lawn and garden equipment NOx and total hydrocarbon emission factors
Y1  - 2001/06/24-28
N1  - R826790
N1  - R826766
ER  - 


TY  - CONF
A1  - Frey, H C
A1  - Zheng, J 
T1  - Quantification of variability and uncertainty in emission inventories: a prototype software tool with application to utility NOx emissions.
Y1  - 2001/06/24-28
N1  - R826766
ER  - 


TY  - CONF
A1  - Frey, H C
A1  - Li, S 
T1  - Quantification of variability and uncertainty in stationary natural gas-fueled internal combustion engine NOx and total organic compounds emission factors
Y1  - 2001/06/24-28
N1  - R826790
N1  - R826766
ER  - 


TY  - CONF
A1  - Frey, H C
A1  - Zheng, J 
T1  - Methods and example case study for analysis of variability and uncertainty in emissions estimation (AUVEE)
N1  - R826766
ER  - 


TY  - CONF
A1  - Frey, H C
A1  - Bharvirkar, R 
A1  - Zheng, J 
T1  - Quantification of variability and uncertainty in emission factors.
N1  - R826766
ER  - 


TY  - CONF
A1  - Frey, H C
A1  - Zheng, J 
T1  - Quantification of variability and uncertainty in emission inventories: a prototype software tool with application to utility NOx emissions
N1  - R826790
N1  - R826766
ER  - 


TY  - CONF
A1  - Zheng, J 
A1  - Frey, H C
T1  - Quantitative analysis of variability and uncertainty in emission estimation: an illustration of methods using mixture distributions.
Y1  - 2001/06/24-28
N1  - R826766
ER  - 


TY  - CONF
A1  - Zheng, J 
A1  - Frey, H C
T1  - Quantitative analysis of variability and uncertainty in emission estimation: an illustration of methods using mixture distributions
N1  - R826790
N1  - R826766
ER  - 


TY  - RPRT
A1  - Frey, H C
A1  - Zheng, J 
T1  - User's Guide for Analysis of Uncertainty and Variability in Emissions Estimation (AUVEE).
Y1  - 2000/09/
N1  - R826766
ER  - 


TY  - RPRT
A1  - Frey, H C
A1  - Zheng, J 
T1  - Methods and example case study for analysis of variability and uncertainty in emissions estimation (AUVEE)
Y1  - 2001/02/
N1  - R826790
N1  - R826766
ER  - 


TY  - RPRT
A1  - Frey, H C
A1  - Unal, A 
A1  - Chen, J 
A1  - Li, S 
A1  - Xuan, C 
T1  - Methodology for developing modal emission rates for EPA's multi-scale motor vehicle and equipment emission estimation system.
Y1  - 2002/08/31
N1  - R826766
ER  - 


TY  - RPRT
A1  - Frey, H C
A1  - Unal, A 
A1  - Chen, J 
T1  - Recommended strategy for on-board emission data analysis and collection for the new generation model.
Y1  - 2002/02/4
N1  - R826766
ER  - 


TY  - RPRT
A1  - Frey, H C
A1  - Zheng, J 
A1  - Zhao, Y 
A1  - Li, S 
A1  - Zhu, Y 
T1  - Technical Documentation of the AuvTool Software for Analysis of Variability and Uncertainty
Y1  - 2002/02/
N1  - R826766
ER  - 


TY  - RPRT
A1  - Loughlin, D H
A1  - Frey, H C
A1  - Hanisak, K 
A1  - Eyth, A 
T1  - Implementation Requirements for the Development of a Sensitivity/Uncertainty Analysis Tool for MIMS
Y1  - 2003/05/6
N1  - R826766
ER  - 


TY  - RPRT
A1  - Zheng, J 
A1  - Frey, H C
T1  - AuvTool User's Guide.
N1  - R826766
ER  -