Variability of optimized parameter estimates based on observed record length (Record no. 30151)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 01617nab a22002777a 4500 |
| 001 - CONTROL NUMBER | |
| control field | G98182 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | MX-TxCIM |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20170719155510.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 121211b |||p||p||||||| |z||| | |
| 022 0# - INTERNATIONAL STANDARD SERIAL NUMBER | |
| International Standard Serial Number | 0001-2351 |
| 040 ## - CATALOGING SOURCE | |
| Original cataloging agency | MX-TxCIM |
| 041 0# - LANGUAGE CODE | |
| Language code of text/sound track or separate title | En |
| 100 1# - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Allred, B. |
| 245 00 - TITLE STATEMENT | |
| Title | Variability of optimized parameter estimates based on observed record length |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
| Date of publication, distribution, etc. | 1991 |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc. | The variability in parameter estimates for a hydrologic model as a function of the number of years of data available for estimating the parameters was investigated. A 25-year record on Spavinaw Creek in Oklahoma and Arkansas was divided into 25 one-year, 12 two-year, and 5 five-year records. Each period was used for parameter estimation. Two objective functions, one based on absolute errors and one based on error sum of squares, were used. Mean parameter values exhibited greater than expected variability, and variances in estimated parameters did not decrease as expected as the number of years used for parameter estimation increased from one to five years. One year was found to dominate one of the estimated model parameters for any record length that included that particular year. Significant differences between parameter values based on the two objective functions were found only for one parameter based on one-year optimizations. |
| 546 ## - LANGUAGE NOTE | |
| Language note | English |
| 595 ## - COLLECTION | |
| Collection | Reprints Collection |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Hydrology |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Modeling |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Parameters |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Haan, C.T., |
| Relator term | coaut. |
| 773 0# - HOST ITEM ENTRY | |
| Title | Transactions of the ASAE |
| Related parts | v. 34, no. 6, p. 2421-2426 |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Koha item type | Article |
| Date last seen | Total Checkouts | Price effective from | Koha item type | Lost status | Damaged status | Not for loan | Collection code | Withdrawn status | Home library | Current library | Date acquired |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 07/03/2017 | 07/03/2017 | Article | Not Lost | Reprints Collection | CIMMYT Knowledge Center: John Woolston Library | CIMMYT Knowledge Center: John Woolston Library | 07/03/2017 |