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| Indexing | 7 |
| Mathematical Models | 7 |
| Statistical Analysis | 7 |
| Information Retrieval | 4 |
| Probability | 3 |
| Algorithms | 2 |
| Automatic Indexing | 2 |
| Information Storage | 2 |
| Subject Index Terms | 2 |
| Algebra | 1 |
| Automation | 1 |
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Author
| Harter, Stephen P. | 2 |
| ALTMANN, BERTHOLD | 1 |
| Bird, P. R. | 1 |
| Choros, Kazimierz | 1 |
| Danilowicz, Czeslaw | 1 |
| Fried, J.B. | 1 |
| Sammon, John W., Jr. | 1 |
Publication Type
| Journal Articles | 1 |
| Reports - Research | 1 |
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Peer reviewedBird, P. R. – Journal of Documentation, 1974
The indexing depth in several documentation systems is shown to have a mixed Poisson distribution. (PF)
Descriptors: Documentation, Indexing, Information Systems, Mathematical Models
Peer reviewedHarter, Stephen P. – Journal of the American Society for Information Science, 1975
Confirms previously published research in concluding that specialty words tend to possess frequency distributions which cannot be described by a single Poisson distribution. (Author/PF)
Descriptors: Automatic Indexing, Indexing, Keywords, Mathematical Models
Peer reviewedHarter, Stephen P. – Journal of the American Society for Information Science, 1975
A probabilistic model of keyword indexing is outlined, and some of the consequences of the model are examined. An algorithm defining a measure of indexability is developed--a measure intended to reflect the relative significance of words in documents. (Author)
Descriptors: Algorithms, Automatic Indexing, Indexing, Mathematical Models
Sammon, John W., Jr. – 1968
This report explains the following mathematical techniques which may be used for relating search requests to documents contained in a library: (1) Boolean Algebraic Retrieval, (2) Linear Statistical Retrieval, (3) Statistical Association Techniques for expanding a query and/or for expanding the set of retrieval documents, (4) Vector Space…
Descriptors: Algebra, Indexing, Information Retrieval, Information Storage
Fried, J.B.; And Others – 1968
The objectives of this research were to investigage (1) the feasibility of an index simulator, and (2) the use of a sequential analysis model for the automatic classification of documents. Index simulation was studied in general for various types of indexes, and in depth for the simulation of an inverted coordinate index to a document collection…
Descriptors: Automation, Classification, Computer Programs, Computers
Peer reviewedChoros, Kazimierz; Danilowicz, Czeslaw – Information Processing and Management, 1982
Discusses methods of weighting of descriptors in document search patterns together with the concept of relative indexing and conditions which should be satisfied by descriptor weight. A procedure for modifiying document search patterns based on users' informational needs and opinions is outlined, and examples are given. Sixteen references are…
Descriptors: Algorithms, Indexing, Information Retrieval, Information Seeking
ALTMANN, BERTHOLD – 1965
AFTER A BRIEF SUMMARY OF THE TEST PROGRAM (DESCRIBED MORE FULLY IN LI 000 318), THE STATISTICAL RESULTS TABULATED AS OVERALL "ABC (APPROACH BY CONCEPT)-RELEVANCE RATIOS" AND "ABC-RECALL FIGURES" ARE PRESENTED AND REVIEWED. AN ABSTRACT MODEL DEVELOPED IN ACCORDANCE WITH MAX WEBER'S "IDEALTYPUS" ("DIE OBJEKTIVITAET…
Descriptors: Correlation, Dictionaries, Evaluation Methods, Hypothesis Testing
