Abstract: Embodiments of the present disclosure disclose a data uploading method and apparatus, a device, and a medium. The method includes: in response to a preset operation triggered by a user before uploading application data, obtaining at least two data uploading protocols; performing data uploading performance testing on each data uploading protocol on the basis of a preset performance testing means, and determining a target uploading protocol that matches with a current network on the basis of a performance testing result; and in response to an application data uploading operation triggered by the user, uploading current target application data to be uploaded on the basis of the target uploading protocol.

Abstract: A video stutter prediction method and apparatus, device and medium are provided. The video stutter prediction method includes: acquiring current playing information when a currently downloaded video is played; acquiring current service information of a server; and according to a pre-set stutter prediction model, the current playing information and the current service information, determining a stutter prediction result when a video to be downloaded at present is played.

Abstract: A method and apparatus of video downloading, a method and apparatus of video transmission, a terminal device, a sever and a medium are provided. The method of video downloading includes: acquiring a buffer length; generating a video data downloading request according to the buffer length; and sending the video data downloading request to a server, and downloading target video data according to a received request result returned by the server with respect to the video data downloading request.

Abstract: A viewing angle prediction method, including determining a current predicted viewing angle corresponding to a current to-be-downloaded clip in a panoramic video based on a head movement trajectory of a user viewing the panoramic video (S110); acquiring a target candidate viewing angle set corresponding to said current to-be-downloaded clip in response to detecting that a current head turning action in the head movement trajectory is an invalid action (S120); and performing correction processing on the current predicted viewing angle, and determining a target predicted viewing angle corresponding to said current to-be-downloaded clip, based on the target candidate viewing angle set (S130).

Abstract: Methods and systems for determining a bitrate for a video to be streamed and controlling a buffer for streaming the video are disclosed. One example method includes receiving, from a streaming service, a predicted playback speed of a video to be played on the device and a probability of the predicted playback speed, wherein the predicted playback speed is determined based on a plurality of video playback speeds of a plurality of videos played by the user, and the probability of the predicted playback speed comprises a probability that the user will change a playback speed of the video from a first playback speed to the predicted playback speed during a playback of the video; determining, based on the predicted playback speed, a version of the video to be provided to the device; and sending, to the streaming service, a request to stream the version of the video.

Abstract: Example computer-implemented methods and systems for determining video resolution for video streaming are disclosed. One example method includes determining a preference of a user for a particular video playback characteristic; determining, based on the determined preference of the user and for each version of a video, a return of interest (ROI), wherein each version of the video has a particular resolution and bitrate; determining, based on the ROI, a version of the video to provide to a device of the user; and providing the corresponding version of the video to the device of the user.

Abstract: System and method for robust sensorless control of permanent magnet assisted synchronous reluctance (PM-SyR) motor. The system and method includes startup control of a motor with known rotor position/speed, but unknown rotor magnetic polarity of a motor exhibiting rotor magnetic anisotropy or saliency. The system and method includes a rotor characteristic detection method for a PM-SyR motor that detects rotor magnetic polarity based on the variation of the inductance that is caused by the leakage flux paths in the rotor barrier bridges and utilizes the detected rotor magnetic polarity for improved motor startup.

Abstract: A buffer configuration method and a switching device are disclosed, to ensure no packet loss. According to the method, a first switching device sends a first measurement frame to a second switching device; receives a second measurement frame sent by the second switching device, where the second measurement frame is generated based on the first measurement frame; determines a buffer configuration parameter based on the first measurement frame and the second measurement frame; and sets a local buffer based on the configuration parameter. The present disclosure is used to automatically configure a buffer of a switching device, thereby reducing required buffer space without packet loss.

Abstract: Embodiments of the present disclosure disclose a data uploading method and apparatus, a device, and a medium. The method includes: in response to a preset operation triggered by a user before uploading application data, obtaining at least two data uploading protocols; performing data uploading performance testing on each data uploading protocol on the basis of a preset performance testing means, and determining a target uploading protocol that matches with a current network on the basis of a performance testing result; and in response to an application data uploading operation triggered by the user, uploading current target application data to be uploaded on the basis of the target uploading protocol.

Abstract: A video stutter prediction method and apparatus, device and medium are provided. The video stutter prediction method includes: acquiring current playing information when a currently downloaded video is played; acquiring current service information of a server; and according to a pre-set stutter prediction model, the current playing information and the current service information, determining a stutter prediction result when a video to be downloaded at present is played.

Abstract: A buffer configuration method and a switching device are disclosed, to ensure no packet loss, and belongs to the field of network technologies. The method includes: sending, by a first switching device, a first measurement frame to a second switching device; receiving, by the first switching device, a second measurement frame sent by the second switching device, where the second measurement frame is generated based on the first measurement frame; determining, by the first switching device, a buffer configuration parameter based on the first measurement frame and the second measurement frame; and setting, by the first switching device, a local buffer based on the configuration parameter. The present disclosure is used to automatically configure a buffer of a switching device, thereby reducing required buffer space without packet loss.

Abstract: A network bandwidth estimation method and apparatus, an electronic device and a storage medium are provided. The method includes: sending a bandwidth test file to a service terminal, and respectively acquiring network state parameters before and after sending the bandwidth test file, wherein a volume of the bandwidth test file is less than a preset file volume threshold; determining a first network bandwidth and a second network bandwidth based on the network state parameters and the volume of the bandwidth test file; inputting the network state parameters, the first network bandwidth, and the second network bandwidth into a current latest network bandwidth estimation model to obtain a target network bandwidth estimation result.

Abstract: System and method for robust sensorless control of permanent magnet assisted synchronous reluctance (PM-SyR) motor. The system and method includes startup control of a motor with known rotor position/speed, but unknown rotor magnetic polarity of a motor exhibiting rotor magnetic anisotropy or saliency. The system and method includes a rotor characteristic detection method for a PM-SyR motor that detects rotor magnetic polarity based on the variation of the inductance that is caused by the leakage flux paths in the rotor barrier bridges and utilizes the detected rotor magnetic polarity for improved motor startup.

Abstract: A method and apparatus of video downloading, a method and apparatus of video transmission, a terminal device, a sever and a medium are provided. The method of video downloading includes: acquiring a buffer length; generating a video data downloading request according to the buffer length; and sending the video data downloading request to a server, and downloading target video data according to a received request result returned by the server with respect to the video data downloading request.

Abstract: This application provides a method and an apparatus for determining a port orientation. The method includes: A first network device receives, through a first port, a protocol data unit PDU sent by a second network device. The first network device determines, based on the PDU, that the first port is an upstream port or a downstream port. In this embodiment of this application, the first network device may determine, based on the PDU sent by the second network device, whether the first port is the upstream port or the downstream port, to provide a basis for subsequently helping an SDN controller reduce load.

Abstract: This application provides a virtual channel setting method and the method includes: a' receiving device receives a first data packet of a first data flow from a sending device, where the first data packet includes an identifier of a first virtual channel corresponding to the first data flow; the receiving device selects a second virtual channel for the first data flow from a first virtual channel group corresponding to the first data flow, where the second virtual channel is different from the first virtual channel; and the receiving device sends an acknowledgement packet to the sending device, where the acknowledgement packet includes an identifier of the second virtual channel, and the second virtual channel is used by the sending device to update a virtual channel corresponding to the first data flow.

Abstract: This application discloses network congestion control methods and apparatuses. In an implementation, a method comprises: obtaining, by the an intelligent network interface card comprised in a network congestion control apparatus, at least two types of traffic. Identifying, by the intelligent network interface card, algorithm matching features of the at least two types of traffic, and in response to determining to perform congestion control on one type of traffic of the at least two types of traffic, determining, by the intelligent network interface card, a congestion control algorithm that matches an algorithm matching feature of the one type of traffic. Performing, by the intelligent network interface card, congestion control on the one type of traffic according to the congestion control algorithm that matches the algorithm matching feature of the one type of traffic.

Abstract: System and method for robust sensorless control of permanent magnet assisted synchronous reluctance (PM-SyR) motor. The system and method includes startup control of a motor with known rotor position/speed, but unknown rotor magnetic polarity of a motor exhibiting rotor magnetic anisotropy or saliency. The system and method includes a rotor characteristic detection method for a PM-SyR motor that detects rotor magnetic polarity based on the variation of the inductance that is caused by the leakage flux paths in the rotor barrier bridges and utilizes the detected rotor magnetic polarity for improved motor startup.

Abstract: This application provides a port configuration method and a communications device. The method includes: obtaining, by a first communications device, an identifier of a second port group of a second communications device, where the identifier of the second port group is used to indicate configuration information of a first port of the first communications device, and establishing, by the first communications device, a connection to a second port in the second port group by using the first port, where the first port is any port of the first communications device, the second port is any port in the second port group, and the configuration information includes an internet protocol IP address; determining, by the first communications device, the configuration information of the first port based on the identifier of the second port group; and configuring, by the first communications device, the configuration information for the first port.

Abstract: This application provides a method and an apparatus for determining a port orientation. The method includes: A first network device receives, through a first port, a protocol data unit PDU sent by a second network device. The first network device determines, based on the PDU, that the first port is an upstream port or a downstream port. In this embodiment of this application, the first network device may determine, based on the PDU sent by the second network device, whether the first port is the upstream port or the downstream port, to provide a basis for subsequently helping an SDN controller reduce load.