35results about How to "Little effect of occlusion" patented technology

The invention discloses a high-isolation semi-groove slot antenna array, and relates to a multiple-input-multiple-output antenna. The antenna array consists of three semi-groove slot antennas which are placed together and are pairwise orthogonal in radiating polarization directions, wherein each semi-groove slot antenna consists of a microstrip feeder line on a medium substrate, and a metal ground surface; a radiating semi-groove slot and a plurality of isolation slots are formed in each metal ground surface; the radiating semi-groove slots are rectangular; one end of each radiating semi-groove slot is short-circuit; the other end of each radiating semi-groove slot is open-circuit; the isolation slots around the radiating semi-groove slots are mutually parallel; long side directions of the radiating semi-groove slots are perpendicular to long side directions of the isolation slots; the resonant frequency of the isolation slot is lower than the working frequency of the antennas; one end of each microstrip feeder line is an input-output port of each antenna; and metal short-circuit pins are arranged at the tail ends of microstrip feeder line conduction bands at the other ends of the microstrip feeder lines, and connect the conduction bands and the metal ground surfaces on the edges of the radiating semi-groove slots. The antenna array can effectively reduce adverse effects of the metal ground surfaces on shielding and isolation of normal radiation of the antennas.

The invention relates to the technical field of medical image processing, in particular to a focus tracking method under a digestive endoscope based on sequential feature learning, which comprises thefollowing steps: collecting lesion video clips as training samples, and constructing and training a tracking model based on a convolutional neural network, a long short-term memory network and an optical flow vector diagram; acquiring network model parameters, acquiring a digestive endoscopy real-time examination video, deframing the digestive endoscopy real-time examination video into pictures,calculating optical flow vector diagrams of two adjacent frames of images, loading a network structure and model parameters based on a convolutional neural network, a long short-term memory network and the optical flow vector diagrams, and calculating the area and position of a focus in real time. By means of the method, the area and the position of the focus can be tracked in real time in the digestive endoscopy process for endoscopy doctors to refer to, and the situation that the focus area is lost due to illumination, angles, shielding and other reasons in the examination process can be effectively prevented. The detection and tracking capacity of the focus under the digestive endoscopy can be improved, and the examination quality of the digestive endoscopy is effectively improved.

The invention discloses a communication method, device and system of an auto-piloted fleet, so as to solve the technical problem that in the prior art, the reliability of vehicle-vehicle communications in the auto-piloted fleet is poor. A DSRC (dedicated short range communications) and VLC (visible light communications) are arranged on each vehicle in the auto-piloted fleet. The communication method comprises the following steps of monitoring the available conditions of the DSRC and the VLC of all the vehicles in the auto-piloted fleet by a master control vehicle; if the situation that the DSRC of all the vehicles are available is monitored, controlling all the vehicles to transmit vehicle travelling information through the corresponding own DSRC; and if the situation that the DSRC of a part of the vehicles or all the vehicles are not available and the VLC of all the vehicles are available is monitored, controlling all the vehicles to transmit the vehicle travelling information throughthe corresponding own VLC. Through the adoption of the technical scheme of the communication method disclosed by the invention, the reliability and the success rate of the vehicle-vehicle communications in the auto-piloted fleet can be improved.

The embodiment of the invention provides a notification message display method and a mobile terminal, which relate to the technical field of communication, and aim to solve the problem that display ofnotification messages seriously shields a full-screen interface. The notification message display method comprises the following steps of when a target interface is in a full-screen display state, receiving a notification message; determining an application program to which the notification message belongs; and according to the application program to which the notification message belongs, displaying a bubble used for representing the notification message of the application program. The notification message display method in the embodiment of the invention is applied to the mobile terminal.

The invention provides a log periodic feed source array based on spaceborne multi-beam antenna space three-dimensional structure layout. The log periodic feed source array is composed of five groups of high-frequency feed units, four groups of low-frequency feed units and a composite material supporting component. The mutual coupling influence on electrical performance of the feed source array between antennas can be reduced to the largest extent through three-dimensional structure layout and unit array distribution optimization under the requirement of spaceborne limited space layout so that the multi-beam coverage requirement of broadband and high gain of the antennas can be realized; the units and the supporting component are simple in structural form and high in reliability so that great rigidity-to-gravity requirement of the feed source array can be realized; and the special composite material and ingenious structural design are adopted, shielding influence of the supporting component on the electrical performance of the formed high-frequency and low-frequency feed units is enabled to be minimized under the condition of meeting the main structural strength of the feed source array, and the space environmental requirements can also be met.

The invention discloses a self-driving fleet communication method and device, and solves the technical problems of poor reliability of vehicle-vehicle communication in the self-driving fleet in the prior art. According to the self-driving fleet communication method and device, a DSRC and a VLC are arranged on each vehicle of the self-driving fleet. The method comprises the steps that the availablestate of the DSRC and the VLC of the vehicle is monitored; when the DSRC is monitored to be available, vehicle driving information is transmitted through the DSRC of the vehicle; and when the DSRC ismonitored to be unavailable and the VLC is monitored to the available, the vehicle driving information is transmitted through the VLC of the vehicle. With application of the technical scheme, the reliability and the success rate of vehicle-vehicle communication in the self-driving fleet can be enhanced.

The invention relates to the field of offshore wind and power, in particular to an offshore cluster floating type wind and power comprehensive utilization platform. The offshore cluster floating typewind and power comprehensive utilization platform comprises a photovoltaic platform and fans. The photovoltaic platform is provided with a photovoltaic power generation system, the photovoltaic platform is connected with a center floating cylinder through a floating supporting platform, multiple connecting blocks are evenly distributed in the circumferential direction of the center floating cylinder, the connecting blocks are connected with a seabed anchorage foundation through a mooring cable, the multiple fans can be interconnected into a whole, the whole system reliability can be improved,meanwhile, the photovoltaic power generation system is arranged on the center area of the cluster floating type platform, the whole incomes of the platform are increased, meanwhile, the sheltering influence of wind and power on center photovoltaic power generation can be reduced, and losses caused by local shade and heat spots can be reduced. In considering of like of different kinds of fish for sunlight, different kinds of fish can be arranged on different areas on the platform, and the yield and incomes of fishery culture can be improved to the maximum degree.

The embodiment of the invention discloses a retrograde judgment method and device based on image recognition, equipment and a storage medium. The method comprises the following steps: acquiring videodata of an escalator area in real time; detecting a head area in the video data, and performing target tracking on the head area to obtain a head movement direction; determining whether the number ofthe head areas is greater than a preset threshold value or not; if the number of the head regions is greater than a preset threshold value, determining a retrograde state according to a proportional relation between the number of the head regions in different motion directions and the number of the head regions; and if the number of the head areas is smaller than or equal to a preset threshold value, carrying out escalator streamer tracking on the video data to obtain the movement direction of an escalator, and determining the retrograde state according to the movement direction of the escalator and the movement direction of the head. The result of target detection based on the head area is accurate, and accurate retrograde detection and alarm can be realized by selecting different retrograde references according to the number of passengers.

The invention discloses a vehicle-mounted airport for an unmanned aerial vehicle and a control method of the vehicle-mounted airport. The vehicle-mounted airport for the unmanned aerial vehicle comprises a mainframe box, a main controller, a power supply battery, a power management module, an unmanned aerial vehicle charging base, a side case, an antenna device and a retracting and releasing device, wherein the main controller, the power management module, the power supply battery and the unmanned aerial vehicle charging base are all installed in the mainframe box; the side case is mounted atthe upper part of the back of the mainframe box; an avoidance space is formed between the bottom and the horizontal plane of the bottom edge of the back of the mainframe box; the retracting and releasing device is used for retracting and releasing the antenna device and comprises an overturning device and a telescopic device; the telescopic device is installed in the side case, the fixed end is hinged to the bottom in the side case, and the telescopic end is connected with the antenna device; and the overturning device is installed in the side case, connected with the telescopic device and used for driving the telescopic device to rotate around the hinged position of the telescopic device. The technical problems that an existing unmanned aerial vehicle for inspection work is low in inspection cruising ability, large in battery management difficulty and small in flight range are solved.

The invention discloses a photovoltaic module with an automatic displacement and cleaning device, which comprises a screw rod guide rail, a cleaning device, a driving component and a photovoltaic component, wherein the cleaning device is connected with the screw rod guide rail, the driving component is connected with the screw rod guide rail, and the driving component drives the screw rod guide rail to rotate and drives the cleaning device to move along the screw rod guide rail to clean the photovoltaic component; as such, the surface of the photovoltaic component can be spray cleaned completely by the cleaning device, and the whole photovoltaic component can be cleaned more thoroughly, so that the photovoltaic component can be conveniently cleaned and periodically cleaned, the shielding influence of dust, pollution and the like can be reduced, and the power generation power of the photovoltaic component can be effectively increased.

The invention discloses a household photovoltaic assembly with a self-cleaning function. The assembly comprises a plurality of photovoltaic module units, and spraying devices are arranged at junctionsof the adjacent photovoltaic module units. The spraying devices can rotate by 360 degrees for spraying. By arranging the spraying devices, radial spraying can be carried out with the spraying devicesas the center, and the spraying devices rotate by 360 degrees to conduct regional cleaning on the photovoltaic module units. The spraying devices are arranged at multiple points so that the whole surface of the household photovoltaic assembly can be cleaned, the functions of convenient cleaning and regular cleaning can be achieved, then the shielding influence of dust, pollution and the like is reduced, and the power generation power of the household photovoltaic module is effectively improved.