The multiple model framework with on-road and off-road modes.
Switches between on-road and off-road modes occur more frequently, increasing the need for robust mode tracking.
In off-road mode, the gasoline engine operates the front wheels and powers the rear electric motor, which turns the back wheels.
It includes nice handling of background audio playback, and an "Off-Road Mode", which is essentially Opera Mini, i.e. pages are rendered on Opera servers, optimized and streamed back to the mobile device, hence saving a lot of processing and bandwidth.
Opera Turbo is still there, but it's now called the off-road mode.
Five different filters are considered: one PF with a single off-road mode, two MMPFs and two IMMPFs with transition probabilities Π ̄ 1 and Π ̄ 2, respectively.
If the state is not feasible, that particle will not be transformed and will therefore continue being in the off-road mode.
Only during one off-road mode does the right analog dial scoot over a bit to display the vehicle's differential settings.
Another important alternative is the interacting multiple model particle filter (IMM-PF) of [7] which is applied to the road target tracking case in [37] with an on-road and off-road mode.
The browser, of course, still includes some Opera staples like the Turbo mode (now called "off-road mode"), but gone are Opera Notes, Link, tab thumbnails and a number of other features Opera users have been accustomed to.
Remark 4 (Feasibility Check) When a particle is selected to be transformed from the off-road mode to the on-road mode, a feasibility check of the new on-road state is done according to Section 4.3 (basically, check if the particle close to a road or not).
