Method of irradiating a load placed in a cavity by radiating UHF or microwave radiation into the cavity. The method includes setting transmission durations, by setting for each of a plurality of frequencies, a respective transmission duration, repeatedly causing energy to be transmitted into the cavity at the plurality of frequencies according to a duty cycle, wherein the duty cycle defines an allotted transmission time for each of the plurality of frequencies, and switching ON or OFF transmission of the energy at certain frequencies, so that over a plurality of repetitions of the duty cycle the energy is transmitted at each of the plurality of frequencies for the respective transmission duration.

An apparatus for applying electromagnetic energy to an object in an energy application zone via at least one radiating element is disclosed. The apparatus may include at least one processor. The at least one processor may be configured to determine a value indicative of energy absorbable by the object at each of a plurality of frequencies and to cause the at least one radiating element to apply energy to the zone in at least a subset of the plurality of frequencies. Energy applied to the zone at each of the subset of frequencies may be a function of the absorbable energy value at each frequency.

A system for fulfilling peer-to-peer transactions by autonomous robot vehicles includes processor(s) and a memory storing instructions which, when executed by the processor(s), cause the system to: receive information on a peer-to-peer transaction between a seller and a buyer for an item, communicate instructions to an autonomous vehicle to travel to a first destination and receive the item, receive an indication that the item has been received, communicate instructions to the autonomous vehicle to travel to a second destination to deliver the item to the buyer, receive a signal indicating that buyer funds are in escrow, and receive a signal indicating that the item is accepted or rejected by the buyer. In a case where the item is accepted, the system communicates a release of the funds from the escrow to the seller. In a case the item is rejected, the system determines a handling itinerary for the item.

An autonomous robot vehicle in accordance with aspects of the present disclosure includes a land vehicle conveyance system, a communication system configured to communicate with a remote human operator system, one or more processors, and a memory storing instructions. The instructions, when executed by the processor(s), cause the autonomous robot vehicle to receive via the communication system control instructions from the remote human operator system for controlling the land vehicle conveyance system, control the land vehicle conveyance system in accordance with the control instructions to perform travel, and autonomously control the land vehicle conveyance system in coordination with the control instructions from the remote human operator system to semi-autonomously perform travel.

A system for a mobile secure locker in accordance with aspects of the present disclosure includes processor(s) and memory storing instructions. The instructions, when executed by the processor(s), cause the system to provide a user interface for a user to rent a mobile secure locker in an autonomous robot vehicle, receive information through the user interface from the user where the information includes a first destination, a second destination, and a time associated with the second destination, communicate instructions to the autonomous robot vehicle to travel to the first destination to receive the item, receive an indication from the autonomous robot vehicle that the item has been received, communicate instructions to the autonomous robot vehicle to travel to the second destination to deliver the item to the user at the time associated with the second destination, and receive from the autonomous robot vehicle an indication the item is retrieved.

A defrosting system includes an RF signal source, an electrode proximate to a cavity within which a load to be defrosted is positioned, and a transmission path between the RF signal source and the electrode. The system also includes power detection circuitry coupled to the transmission path and configured repeatedly to take forward and reflected RF power measurements along the transmission path. A system controller repeatedly determines, based on the forward and reflected RF power measurements, a calculated rate of change, and repeatedly compares the calculated rate of change to a threshold rate of change. When the calculated rate of change compares favorably with the threshold rate of change, the RF signal source continues to provide the RF signal to the electrode until a determination is made that the defrosting operation is completed, at which time the RF signal source ceases to provide the RF signal to the electrode.

Provided herein is an autonomous or semi-autonomous vehicle fleet comprising a plurality of electric autonomous vehicle for apportioned display of a media, operating autonomously and a fleet management module for coordination of the autonomous vehicle fleet. Each autonomous or semi-autonomous vehicle comprising a screen configured to display the media. Activation, deactivation, brightness modification, in combination with specific media selection enables more efficient media display.

A system is configured to perform an operation that results in increasing a thermal energy of a load. The system includes a radio frequency signal source configured to supply a radio frequency signal, an electrode coupled to the radio frequency signal source, and a variable impedance network that includes at least one variable passive component. The variable impedance network is coupled between the radio frequency signal source and the electrode. The system includes a controller configured to determine an operation duration based upon a configuration of the variable impedance network, and to cause the radio frequency signal source to supply the radio frequency signal for the operation duration.

An RF system includes an RF signal source and a single-ended or double-ended impedance matching network. Non-linear devices, such as gas discharge tubes, are coupled in parallel with components of the impedance matching network. The non-linear devices are insulating below a breakdown voltage and conductive above the breakdown voltage. The system also includes measurement circuitry configured to measure one or more parameters that reflect changes in the impedance of the impedance matching network. A system controller modifies operation of the system when a rate of change of any of the monitored parameter(s) exceeds a predetermined threshold.

A defrosting system includes an RF signal source, one or more electrodes, a transmission path between the RF signal source and the electrode(s), and an impedance matching network coupled along the transmission path. A system controller may modify the impedance matching network to reduce the reflected signal power. The system controller may determine an initial estimate of the mass of the load. Desired signal parameters for the RF signal may be determined based on the initial estimated mass of the load. The system controller may determine a refined estimate of the load mass based on a rate of change of an S11, VSWR, or reflected power parameter measured at the transmission path, or based on elapsed time between matches. Refined signal parameters for the RF signal may be determined based on the refined estimated mass.