Abstract: A system and method for preparing epoxy chloropropane is provided in that by coupling three stages of high gravity reactors, the product epoxy chloropropane and water vapor are distilled from a reaction system in form of an azeotrope by adopting a water vapor steam stripping method. Further, by combining the azeotrope with the multiples stages of high gravity reactors, the gas phase mass transfer and the liquid phase mass transfer of the azeotrope are improved aiming at the features of the azeotrope in the reaction system, thus making the overall conversion rate higher. In addition, by combining steam stripping and high gravity, dichloropropanol and alkali solution are rapidly mixed for mass transfer, and the product epoxy chloropropane is rapidly distilled from the reaction system in the form of the azeotrope, such that the reaction proceeds continuously towards the direction of producing epoxy chloropropane, thus significantly improving the conversion rate.

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.

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 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.