Figure 1 - uploaded by Stéphane Gançarski
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Test results. The rows from top to bottom show graphs for flat, linear and exponential weighting respectively. The three leftmost columns show graphs for feature selection based on weighted contingencies. The three columns at the right side show result graphs for feature selection based on weighted 2 's. The first and fourth column have 50, second and fifth 100 and third an sixth column 200 examples per time bucket. The x-axis displays the number of buckets taken into account. The y-axis lists the number of examples classified correctly. Results are by displayed the amount of documents per bucket (2, 5, 10, 100). Cf. Section 4.1.
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Temporal queries combine textual and temporal constraints and are used for searching temporal collections like web archives. Indexing these collections might result in huge index files which can reduce the performance of query processing. Static index pruning can be used to increase efficiency. It remains unclear whether these methods are adapted f...
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