Abstract: Disclosed is a dynamic regulation method for a lane changing decision point of a CAV dedicated lane in a diverging area of an expressway, applied to the diverging area of the expressway in which the CAV dedicated lane is provided at an inner side of a road. Vehicles traveling in the CAV dedicated lane are all CAVs. Both the CAVs and human-driven vehicles can travel in ordinary lanes. The method calculates the lane changing decision points of diversion vehicles in the CAV dedicated lane at current time using corresponding algorithms based on a relationship between the lane changing decision points of the CAV dedicated lane and traffic efficiency and a traffic safety.

Abstract: Disclosed is a dynamic regulation method for a lane changing decision point of a CAV dedicated lane in a diverging area of an expressway, applied to the diverging area of the expressway in which the CAV dedicated lane is provided at an inner side of a road. Vehicles traveling in the CAV dedicated lane are all CAVs. Both the CAVs and human-driven vehicles can travel in ordinary lanes. The method calculates the lane changing decision points of diversion vehicles in the CAV dedicated lane at current time using corresponding algorithms based on a relationship between the lane changing decision points of the CAV dedicated lane and traffic efficiency and a traffic safety.

Abstract: Embodiments of the present disclosure provide a method for traffic flow control considering a bus stop in a connected environment, comprising: determining an influence region of the bus stop; dividing the influence region of the bus stop into influence subregions; collecting vehicle information of each of the influence subregions at time t; comparing lane changing pressures of different influence subregions of the bus stop; determining a predicted count of lane changing vehicles of each of the influence subregions based on lane changing pressure differences; and selecting optimal lane changing vehicles to complete lane changing. A vehicle density distribution in the influence region of the bus stop can be dynamically regulated through vehicle information interaction in the connected environment, thereby making the spatial distribution of the traffic flow more balanced, saving vehicle traveling time, and improving the operation efficiency of the traffic flow.

Abstract: Embodiments of the present disclosure provide a method for lane changing decision for vehicles on expressways considering safety risks in a networked environment, which is applicable to a multi-lane expressway. The method includes collecting a demand for lane change of a target vehicle; collecting a roadway and a lane where the target vehicle is located; collecting intervals between the target vehicle and a front vehicle and a rear vehicle on a lane that is switching into; determining a lane change direction of the vehicle; and executing a lane change operation by the target vehicle. A lane changing decision model provided in the embodiments of the present disclosure helps to improve the efficiency of lane change and the safety of lane change in expressways and provides a support for changing lanes in a multi-lane expressway.

Abstract: Embodiments of the present disclosure provide a method for traffic flow control considering a bus stop in a connected environment, comprising: determining an influence region of the bus stop; dividing the influence region of the bus stop into influence subregions; collecting vehicle information of each of the influence subregions at time t; comparing lane changing pressures of different influence subregions of the bus stop; determining a predicted count of lane changing vehicles of each of the influence subregions based on lane changing pressure differences; and selecting optimal lane changing vehicles to complete lane changing. A vehicle density distribution in the influence region of the bus stop can be dynamically regulated through vehicle information interaction in the connected environment, thereby making the spatial distribution of the traffic flow more balanced, saving vehicle traveling time, and improving the operation efficiency of the traffic flow.

Abstract: A macro-to-micro two-stage camera lens focusing device based on a direct-drive air floatation platform includes: a two-stage motion device with macro-motion and micro-motion focusing systems. The focusing device includes: a z-direction macro-motion system, a z-direction micro-motion focusing system, and a y-direction micro-motion focusing system. The macro-motion system includes flat-plate linear motors, a tubular linear motor, a tubular elastic balancing device, and an aerostatic air flotation platform; and the micro-motion focusing system includes a micro-motion platform base, piezoceramic actuators, micro-motion flexure hinges, a micro-motion platform, and an industrial camera lens.

Abstract: A frame-type bilateral reverse permanent magnet direct current linear motor is provided, including a support frame, an iron yoke assembly with a first iron yoke, a second iron yoke and a middle iron yoke, a permanent magnet group, a coil winding and a pole piece assembly. Two groups of intermediate transition permanent magnet assemblies are disposed between the first iron yoke and the middle iron yoke and between the second iron yoke and the middle iron yoke. The intermediate transition permanent magnet assemblies includes transition permanent magnets and corresponding transition connection iron yokes; and magnetic pole orientations of the transition permanent magnets of the two groups of intermediate transition permanent magnet assemblies are reverse. The linear motor realizes efficient direct-current linear control, and has a high speed, a precise controllability, a high thrust density and small thrust fluctuation, and easiness in assembling.

Abstract: A tracking system and a method thereof are provided in this disclosure. The tracking method includes steps of: capturing first images of the physical environment by a first electronic device; extracting a plurality of first feature points from the first images; generating a plurality of map points according to the extracted first feature points; building a map of the physical environment according to the map points by the first electronic device; capturing a second image of the physical environment by a second electronic device; extracting second feature points of the second image and transmitting the second feature points to the first electronic device; and estimating a pose of the second electronic device according to the map and the received second feature points by the first electronic device.

Abstract: A tracking system and a method thereof are provided in this disclosure. The tracking method includes steps of: capturing first images of the physical environment by a first electronic device; extracting a plurality of first feature points from the first images; generating a plurality of map points according to the extracted first feature points; building a map of the physical environment according to the map points by the first electronic device; capturing a second image of the physical environment by a second electronic device; extracting second feature points of the second image and transmitting the second feature points to the first electronic device; and estimating a pose of the second electronic device according to the map and the received second feature points by the first electronic device.

Abstract: The present invention relates to methods and applications of using Drosophila cells to produce virus-like particles. Virus-like particles of enveloped viruses produced by the methods of the present invention have proteins correctly expressed, cleaved, and assembled. Ultimately, virus-like particles having good immunogenicity are obtained. The present invention also provides recombinant cells expressing virus-like particles and compositions containing virus-like particles.