Abstract: A self-priming jet pump includes a pump body provided with a water inlet and a water outlet. A jet tube and an impeller are arranged in the pump body. The jet tube is communicated with the water inlet and an inlet of an impeller. A first channel is arranged on the outer periphery of the jet tube. The first channel is communicated with the water inlet and the impeller. A cross-section of the first channel is a closed or open annular structure, and the first channel is around the outer periphery of the jet tube. The first channel is provided with a valve core. When a pressure at the water inlet is greater than a predetermined pressure at the impeller, the valve core moves to switch on the first channel. A cavitation problem is relieved by arranging the flow-increasing channel.

Abstract: Embodiments of the disclosure provide a system and method for determining a trajectory of a subject. The method can include acquiring motion data of the subject to which the mobile device is attached; determining a motion status of the subject based on the motion data; and determining the trajectory based on the motion data using a trajectory model corresponding to the motion status.

Abstract: A method and system for determining a heading of a vehicle. The method may include receiving, from a mobile computing device, a request for determining the heading of the vehicle. The method may also include retrieving, at least in response to the request, sensor data generated by a magnetometer of the mobile computing device within one or more first time slots, and obtaining a classifier trained to determine a predicted heading of the vehicle. The method may further include, for the sensor data of each of the one or more first time slots, obtaining a feature vector by extracting features from the sensor data, and determining, based on the obtained feature vector, a predicted heading by inputting the feature vector into the classifier. The method may also include determining the heading of the vehicle based on the obtained one or more predicted headings.

Abstract: Embodiments of the present disclosure are directed to systems and methods for determining a vehicle orientation. In one implementation, a computer-implemented method for determining a vehicle orientation may include receiving a first set of satellite signals associated with a connected device positioned relatively stationary with respect to a vehicle. The method may also include determining that the first set of satellite signals is insufficient to determine the vehicle orientation. The method may further include determining the vehicle orientation based on a first relative orientation of the connected device relative to the vehicle and a second relative orientation of the connected device relative to a reference object.

Abstract: Methods and systems for providing transportation service to a passenger are disclosed. An exemplary method for providing transportation service may include receiving a transportation request from a terminal device, the transportation request indicating a passenger position. The method may further include causing the terminal device to search for network condition information associated with the passenger position. The method may also include determining, by at least one processor, a pick-up location for the transportation request based on the network condition information, and providing the pick-up location to the terminal device.

Abstract: Methods and systems for providing transportation service to a passenger are disclosed. An exemplary method for providing transportation service may include receiving a transportation request from a terminal device, the transportation request indicating a passenger position. The method may further include causing the terminal device to search for network condition information associated with the passenger position. The method may also include determining, by at least one processor, a pick-up location for the transportation request based on the network condition information, and providing the pick-up location to the terminal device.

Abstract: Embodiments of the disclosure provide systems and methods for positioning a gateway of an architecture. The method may include determining a trajectory of a mobile device based on motion data acquired by the mobile device and a movement model, acquiring a first end position of the trajectory of the mobile device, detecting that the mobile device enters or exits the architecture, and determining a second end position of the trajectory upon the detection as the position of the gateway.

Abstract: A method and system for determining a heading of a vehicle. The method may include receiving, from a mobile computing device, a request for determining the heading of the vehicle. The method may also include retrieving, at least in response to the request, sensor data generated by a magnetometer of the mobile computing device within one or more first time slots, and obtaining a classifier trained to determine a predicted heading of the vehicle. The method may further include, for the sensor data of each of the one or more first time slots, obtaining a feature vector by extracting features from the sensor data, and determining, based on the obtained feature vector, a predicted heading by inputting the feature vector into the classifier. The method may also include determining the heading of the vehicle based on the obtained one or more predicted headings.

Abstract: Embodiments of the present disclosure are directed to systems and methods for determining a vehicle orientation. In one implementation, a computer-implemented method for determining a vehicle orientation may include receiving a first set of satellite signals associated with a connected device positioned relatively stationary with respect to a vehicle. The method may also include determining that the first set of satellite signals is insufficient to determine the vehicle orientation. The method may further include determining the vehicle orientation based on a first relative orientation of the connected device relative to the vehicle and a second relative orientation of the connected device relative to a reference object.

Abstract: Embodiments of the disclosure provide a system and method for determining a trajectory of a subject. The method can include acquiring motion data of the subject to which the mobile device is attached; determining a motion status of the subject based on the motion data; and determining the trajectory based on the motion data using a trajectory model corresponding to the motion status.

Abstract: Embodiments of the disclosure provide systems and methods for positioning a gateway of an architecture. The method may include determining a trajectory of a mobile device based on motion data acquired by the mobile device and a movement model, acquiring a first end position of the trajectory of the mobile device, detecting that the mobile device enters or exits the architecture, and determining a second end position of the trajectory upon the detection as the position of the gateway.

Abstract: Systems and methods for positioning a terminal device based on deep learning are disclosed. The method may include acquiring, by a positioning device, a set of preliminary positions associated with the terminal device, acquiring, by the positioning device, a base map corresponding to the preliminary positions, and determining, by the positioning device, a position of the terminal device using a neural network model based on the preliminary positions and the base map.

Abstract: Embodiments of the disclosure provide systems and methods for positioning a gateway of an architecture. The method may include determining a trajectory of a mobile device based on motion data acquired by the mobile device and a movement model, acquiring a first end position of the trajectory of the mobile device, detecting that the mobile device enters or exits the architecture, and determining a second end position of the trajectory upon the detection as the position of the gateway.