Predictions from these 100 smoothers were then made across the range of the data. The same type of bias and variance estimates hold for the backward particle smoothers. As with other smoothers, a width or interval must be specified. To mathematically describe this relationship, LOESS smoothers (with bandwidth 0.5) are used. LAX lost the tag titles on November 15 to FBI (Nunzio and Tracy Smoothers). The same technique can be applied to smoothers. Filters and smoothers are used extensively in modem sonar systems. Optimal smoothers for state estimation and input estimation can be constructed similarly.