Abstract: Embodiments of the present disclosure provide a ferromagnetic object detection device and a method for detecting a tubing coupling. The ferromagnetic object detection device includes a support tube, a magnetic field generating device and a magnetic detection device. The support tube includes a space penetrating in a first direction; the magnetic field generating device is located on an outer sidewall of the support tube and configured to generate a magnetic field; the magnetic field detection device includes a first magnetic field detection element, a second magnetic field detection element and a third magnetic field detection element.

Abstract: Embodiments of the present disclosure provide a ferromagnetic object detection device and a method for detecting a tubing coupling. The ferromagnetic object detection device includes a support tube, a magnetic field generating device and a magnetic detection device. The support tube includes a space penetrating in a first direction; the magnetic field generating device is located on an outer sidewall of the support tube and configured to generate a magnetic field; the magnetic field detection device includes a first magnetic field detection element, a second magnetic field detection element and a third magnetic field detection element.

Abstract: A message management method is performed at a computing device, the method including: storing received messages into a plurality of cache queues according to priorities of the received messages; extracting messages from the plurality of cache queues, and storing the extracted messages into a uniform cache queue, wherein the uniform cache queue includes multiple entries, each entry corresponding to a respective one of the plurality of cache queues; scheduling the stored messages in the uniform cache queue to a plurality of outputting scheduling queues according to their respective priorities; and transmitting the stored messages from the scheduling queues to respective terminals by using a transmit channel corresponding to the scheduling queues.

Abstract: A message management method is performed at a computing device, the method including: storing received messages into a plurality of cache queues according to priorities of the received messages; extracting messages from the plurality of cache queues, and storing the extracted messages into a uniform cache queue, wherein the uniform cache queue includes multiple entries, each entry corresponding to a respective one of the plurality of cache queues; scheduling the stored messages in the uniform cache queue to a plurality of outputting scheduling queues according to their respective priorities ; and transmitting the stored messages from the scheduling queues to respective terminals by using a transmit channel corresponding to the scheduling queues .