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Infinite impulse response - Wikipedia, the free encyclopedia (477 words) |
 | The simplest analog IIR filter is an RC filter made up of a single resistor (R) feeding into a node shared with a single capacitor (C). |
| IIR filters may be implemented as either analog or digital filters. |
| An IIR filter is typically characterized by its order, which is the number of polynomial terms in the denominator of the transfer function. |
| The IIR evaluation model: a framework for evaluation of interactive information retrieval systems (13698 words) |
| The IIR evaluation model is presented as an alternative to the system-driven Cranfield model (Cleverdon, Mills and Keen, 1966; Cleverdon and Keen, 1966) which still is the dominant approach to the evaluation of IR and IIR systems. |
| Ingwersen stresses, in relation to IIR, the importance of taking into account situational factors such as the work task the user is trying to perform, what the user knows about the domain, the system, their own cognitive environment and the conceptual aspects of searching in order to achieve successful and optimal IR. |
| The IIR evaluation model is primarily a response to the domination of the Cranfield model and its application to the evaluation of IIR systems within the system-driven approach to IR evaluation. |
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