Abstract: The present disclosure is related to a microwave source. The microwave source may include a cathode heater and a thermionic emitter. The cathode heater may include a first component, and a second component enclosing at least a portion of the first component. The thermionic emitter may be configured to release electrons when the thermionic emitter is heated by the cathode heater. At least a portion of the second component of the cathode heater may be in contact with the thermionic emitter.

Abstract: In response to a graphics memory allocation request generated during the running of a target task and for graphics memory needed during running of the target task, target data generated during running of each sub-task of multiple sub-tasks is classified, where a type of the target data comprises at least first data, and where the first data is not used by a subsequent sub-task. Multiple target graphics memory pools are allocated to the multiple sub-tasks. Each target graphics memory pool of the multiple target graphics memory pools is divided into at least one graphics memory block based on a type of the target data, where the at least one graphics memory block includes at least a first graphics memory block corresponding to the first data, and where multiple first graphics memory blocks corresponding to the multiple sub-tasks are mapped to a same target physical memory address.