Availability and category-frequency estimation

Similarity , Frequency , and Category Representations

This article studies the joint roles of similarity and frequency in determining graded category structure. Perceptual classification learning experiments were conducted in which presentation frequencies of individual exemplars were manipulated. The exemplars had varying degrees of similarity to members of the target and contrast categories. Classification accuracy and typicality ratings increas...

Regularized Autoregressive Multiple Frequency Estimation

The paper addresses a problem of tracking multiple number of frequencies using Regularized Autoregressive (RAR) approximation. The RAR procedure allows to decrease approximation bias, comparing to other AR-based frequency detection methods, while still providing competitive variance of sample estimates. We show that the RAR estimates of multiple periodicities are consistent in probabilit...

Sensitivity of Category I Precision Approach Availability to Ionospheric Monitoring

The performance of a GPS augmentation system supporting Category I (CAT I) Precision Approach (PA) service availability is highly dependent on the selection of Ionospheric Grid Points (IGPs) and satellite mask. By defining the IGP grid mask and minimum satellite elevation angle, this paper provides the criteria necessary to achieve various levels of PA CAT I availability. Together with bounds o...

Service-Level Availability Estimation of GPRS

The General Packet Radio Service (GPRS) extends the Global System Mobile Communication (GSM) by introducing a packet-switched transmission service. This paper analyzes the GPRS behavior under critical conditions. In particular, we focus on outages, which significantly impact the GPRS dependability. In fact, during outage periods, the cumulative number of users trying to access the service grows...

Nonparametric Estimation of the Average Availability