| 摘要 |
A computer-implemented Internet advertising method for serving impression opportunities in a system for delivery of display advertising. The likelihood that a booked contract could be served by a future forecasted user visit is calculated as a probability mass, and associated with the booked contract. The relative sizes of the probability masses of a plurality of eligible contracts is used as a selector in conjunction with a selected pseudo-random number. In exemplary embodiments, a server is configured for receiving an event predicate as a result of a user visit to a web site. Based on the received event predicate, a set of eligible contracts is assembled. Each eligible contract is assigned to exactly one interval selected from a range, the size of the interval corresponding to the probability mass of the eligible contract. The generated pseudo-random number is used for selecting an interval, which operation selects an eligible advertisement for display.
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