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COMP: a BASIC language nonlinear least-squares curve fitting program

Description: COMP is an interactive nonlinear least squares routine written in BASIC language and used to obtain estimates of parameters in nonlinear functions and to approximate their associated statistical errors. The program uses the linearizing (or Taylor Series) expansion of partial derivatives outlined in Draper and Smith, (1966, pp. 267 to 270). Therefore, partial derivatives must be supplied (as well as the function) by the user for any new models not currently contained in the programs. When a line… more
Date: November 1, 1977
Creator: Thomas, J. M.; Cochran, M. I.; Watson, C. R. & Eberhardt, L. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Statistical magnetohydrodynamics and reversed-field-pinch quiescence

Description: A statistical model of a bounded, incompressible, cylindrical magnetofluid is presented. This model predicts the presence of magnetic fluctuations about a cylindrically-symmetric, Bessel-function-model, mean magnetic field, which satisfies del x <B> = ..mu.. <B>. As theta ..-->.. 1.56, the model predicts that the significant region of the fluctuation spectrum narrows down to a single (coherent) m = 1 mode. An analogy between the Debye length of an electrostatic plasma and ..mu../sup -1/ suggest… more
Date: January 1, 1982
Creator: Turner, L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Stochastic model of radioiodine transport

Description: A research project has been underway at the Oak Ridge National Laboratory with the objective to evaluate dose assessment models and to determine the uncertainty associated with the model predictions. This has resulted in the application of methods to propagate uncertainties through models. Some techniques and results related to this problem are discussed.
Date: January 1, 1980
Creator: Schwarz, G. & Hoffman, F.O.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Geostatistics project of the national uranium resource evaluation program. Progress report, October 1979-March 1980

Description: During the period covered by this report, the authors investigated the serial properties of aerial radiometric data. Results were applied to the choice of minimum segment width in the maximum variance segments algorithm and to the use of aerial radiometric data in the design of ground sampling experiments. The report also presents the results of a comparison of normal and lognormal percentile estimation techniques. Twenty-two quadrangles are being analyzed in the search for a uranium favorabili… more
Date: August 1, 1980
Creator: Campbell, K.; Bement, T. R.; Howell, J. A.; Beckman, R. J.; Jackson, K. & Buslee, P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The International Coal Statistics Data Base program maintenance guide

Description: The International Coal Statistics Data Base (ICSD) is a microcomputer-based system which contains information related to international coal trade. This includes coal production, consumption, imports and exports information. The ICSD is a secondary data base, meaning that information contained therein is derived entirely from other primary sources. It uses dBase III+ and Lotus 1-2-3 to locate, report and display data. The system is used for analysis in preparing the Annual Prospects for World Co… more
Date: June 1, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Estimates of the number of large amplitude gusts

Description: Preliminary estimates are presented of the number of occurrences of large amplitude gusts for use in the design of wind energy conversion systems. Existing turbulence information has been combined with an assumed wind speed distribution to arrive at the estimates. The number of large amplitude gusts per year is treated as a function of the annual mean wind speed and terrain roughness. This treatment is based upon the assumptions that the atmosphere has neutral stability during high winds and th… more
Date: March 1, 1978
Creator: Ramsdell, J.V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Statistical relationship between median visibility and conditions of worst-case manmade impact on visibility

Description: A study was conducted of the statistical relationships between median visibility and the levels of visibility associated with worst-case manmade impacts. The data base for the study consisted of midday visibility recordings for the years 1974-1976 at 28 suburban/nonurban airports throughout the United States. The visibility recordings were converted to estimates of extinction coefficients with the use of the Koschmeider formula. The data were sorted according to meteorology in order to eliminat… more
Date: January 1, 1980
Creator: Gins, J.D.; Nochumson, D. & Trijonis, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

An analysis of residential energy consumption in a temperate climate

Description: Electrical energy consumption data have been recorded for several hundred submetered residential structures in Middle Tennessee. All houses were constructed with a common energy package.'' Specifically, daily cooling usage data have been collected for 130 houses for the 1985 and 1986 cooling seasons, and monthly heating usage data for 186 houses have been recorded by occupant participation over a seven-year period. Cooling data have been analyzed using an SPSSx multiple regression analysis and … more
Date: June 1, 1987
Creator: Clark, Y.Y. & Vincent, W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Robust estimates of location called compromise estimates. Progress report

Description: Two types of robust estimates of location, psi-compromised M-estimates and gap-compromised estimates, are discussed and compared via a simulation. The relationships between the two types of estimators are seen to depend on both the sample size and the underlying distribution of the data. 11 figures, 6 tables.
Date: January 1, 1980
Creator: Guarino, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Concept of a (1-. cap alpha. ) performance confidence interval

Description: A multi-input, single-output system is assumed to be represented by some model. The distribution functions of the input and the output variables are considered to be at least obtainable through experimental data. Associated with the computer response of the model corresponding to given inputs, a conditional pseudoresponse set is generated. This response can be constructed by means of the model by using the simulated pseudorandom input variates from a neighborhood defined by a preassigned probab… more
Date: 1980~
Creator: Leong, H. H.; Johnson, G. R. & Bechtel, T. N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Dose-rate models for human survival after exposure to ionizing radiation

Description: This paper reviews new estimates of the L/sub 50/ in man by Mole and by Rotblat, the biological processes contributing to hematologic death, the collection of animal experiments dealing with hematologic death, and the use of regression analysis to make new estimates of human mortality based on all relevant animal studies. Regression analysis of animal mortality data has shown that mortality is dependent strongly on dose rate, species, body weight, and time interval over which the exposure is de… more
Date: January 1, 1986
Creator: Jones, T.D.; Morris, M.D. & Young, R.W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Site insolation and wind power characteristics: technical report western region (north section)

Description: This phase of the Site Insolation and Wind Power Characteristics Study was performed to provide statistical information on the expected future availability of solar and wind power at various sites in the Western Region (North Section) of the US Historic data (SOLMET), at 21 National Weather Service stations with hourly solar insolation and collateral meteorological information, were interrogated to provide an estimate of future trends. Solar data are global radiation incident on a horizontal su… more
Date: August 1, 1980
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Evaluating late detection capability against diverse insider adversaries

Description: This paper describes a model for evaluating the late (after-the-fact) detection capability of material control and accountability (MCandA) systems against insider theft or diversion of special nuclear material. Potential insider cover-up strategies to defeat activities providing detection (e.g., inventories) are addressed by the model in a tractable manner. For each potential adversary and detection activity, two probabilities are assessed and used to fit the model. The model then computes the … more
Date: December 3, 1987
Creator: Sicherman, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Site insolation and wind power characteristics: technical report western region (south section)

Description: This phase of the Site Insolation and Wind Power Characteristics Study was performed to provide statistical information on the expected future availability of solar and wind power at various sites in the Western Region (South Section) of the US Historic data (SOLMET), at 22 National Weather Service stations with hourly solar insolation and collateral meteorological information, were interrogated to provide an estimate of future trends. Solar data are global radiation incident on a horizontal su… more
Date: August 1, 1980
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

An analysis of residential energy consumption in a temperate climate

Description: Electrical energy consumption data have been recorded for several hundred submetered residential structures in Middle Tennessee. All houses were constructed with a common energy package.'' Specifically, daily cooling usage data have been collected for 130 houses for the 1985 and 1986 cooling seasons, and monthly heating usage data for 186 houses have been recorded by occupant participation over a seven-year period. Cooling data have been analyzed using an SPSSx multiple regression analysis and … more
Date: June 1, 1987
Creator: Clark, Y.Y. & Vincent, W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Methods in probability and statistical inference. Final report, June 15, 1975-June 30, 1979. [Dept. of Statistics, Univ. of Chicago]

Description: This report describes the research activities of the Department of Statistics, University of Chicago, during the period June 15, 1975 to July 30, 1979. Nine research projects are briefly described on the following subjects: statistical computing and approximation techniques in statistics; numerical computation of first passage distributions; probabilities of large deviations; combining independent tests of significance; small-sample efficiencies of tests and estimates; improved procedures for s… more
Date: June 1, 1980
Creator: Wallace, D L & Perlman, M D
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

MLE (Maximum Likelihood Estimator) reconstruction of a brain phantom using a Monte Carlo transition matrix and a statistical stopping rule

Description: In order to study properties of the Maximum Likelihood Estimator (MLE) algorithm for image reconstruction in Positron Emission Tomographyy (PET), the algorithm is applied to data obtained by the ECAT-III tomograph from a brain phantom. The procedure for subtracting accidental coincidences from the data stream generated by this physical phantom is such that he resultant data are not Poisson distributed. This makes the present investigation different from other investigations based on computer-si… more
Date: October 1, 1987
Creator: Veklerov, E.; Llacer, J. & Hoffman, E.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Some properties of the log-Laplace distribution

Description: A random variable Y is said to have the Laplace distribution or the double exponential distribution whenever its probability density function is given by lambda exp(-lambda abs. value y), where -infinity < y < infinity and lambda > 0. The random variable X = exp(Y) is said to have the log-Laplace distribution. With the problem of extrapolation to low doses in dose response curves as motivation, an axiomatic characterization of the log-Laplace distribution is obtained. 1 figure.
Date: January 1, 1980
Creator: Uppuluri, V.R.R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Predicting low-probability/high-consequence events

Description: PRAs often require quantification of the probabilities of various low-probability events, such as accident-initiating events and hardware-fault events. A two-stage Bayes/empirical Bayes data pooling procedure is presented for use in combining as many as five different types of relevant data. A Poisson model is assumed for the event in question. Empirical Bayes methods are used to determine the population variability curve, while Bayesian methods are used to specialize this curve to the specific… more
Date: January 1, 1982
Creator: Martz, H.F. & Bryson, M.C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Some properties of the log-Laplace distribution

Description: A random variable ..gamma.. is said to have the Laplace distribution or the double exponential distribution whenever its probability density function is given by lambda exp(-lambda absolute value (y)), where -infinity < y < infinity and lambda > 0. The random variable X = exp(..gamma..) is said to have the log-Laplace distribution. With the problem of extrapolation to low doses in dose response curves as a motivation, an axiomatic characterization of the log-Laplace distribution is obtained. 1 … more
Date: August 1, 1980
Creator: Uppuluri, V.R.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Technology trends in econometric energy models: Ignorance or information

Description: Simple time trend variables in factor demand models can be statistically powerful variables, but may tell the researcher very little. Even more complex specification of technical change, e.g. factor biased, are still the economentrician's measure of ignorance'' about the shifts that occur in the underlying production process. Furthermore, in periods of rapid technology change the parameters based on time trends may be too large for long run forecasting. When there is clearly identifiable engine… more
Date: January 1, 1991
Creator: Boyd, G.; Kokkelenberg, E. & Ross, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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