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197results about How to "Stable record" patented technology

Human flow statistics method, device and system

The embodiment of the invention provides a human flow statistics method, device and system. The method comprises a step of acquiring continuous frames of images collected by an image acquisition device, a step of inputting the continuous frames of images into a full convolutional neural network obtained by training and generating a head confidence distribution map of each frame of image in the continuous frames of images, a step of determining at least one human head detection target in each frame of image by using a preset target determination method for the head confidence distribution map of each frame of image, a step of obtaining a feature matching result and motion smoothness of any human head detection target in each frame of image, carrying out target association on the current frame and a previous frame of the current frame to obtain tracking targets according to the feature matching result and the motion smoothness of any human head detection target in each frame of image, distributing tracking identifiers to the tracking targets, and a step of counting the number of all tracking identifiers to obtain a result of human flow statistics. Through the method, the device and the system, the accuracy and operational efficiency of the human flow statistics can be improved.
Owner:HANGZHOU HIKVISION DIGITAL TECH

Method for producing hologram by pico-second laser

Disclosed is a method of producing a hologram through a two-beam laser interfering exposure process, which comprises emitting a coherent laser light with a pulse width (τ) ranging from greater than 900 femtoseconds to 100 picoseconds and a laser power of 10 μJ/pulse or more using a solid-state laser as a light source, dividing the pulses light from the laser into two beams, controlling the two beams temporally and spatially in such a manner that the two beam are converged on a surface of or inside a workpiece for recording a hologram while matching the respective converged spots of the two beams with one another temporally and spatially to create the interference therebetween so as to record a surface-relief hologram on the surface of the workpiece or an embedded hologram inside the workpiece in an irreversible manner. The present invention can solve a problem with a conventional process of recording a hologram in a non-photosensitive material in an irreversible manner using interfering femtosecond laser pulses, specifically, distortion in the waveforms of pulsed laser beams and resulting instability in recording of an embedded hologram due to a non-linear optical interaction between the femtosecond laser pulses and air/the material.
Owner:JAPAN SCI & TECH CORP

System for individually recording production performance of layers and automatically monitoring environment of layer house

The invention relates to a system for individually recording the production performance of layers and automatically monitoring the environment of a layer house, which comprises an intelligent coop, an environment monitoring system, an upper computer and a lower computer, wherein the intelligent coop and the environment monitoring system are respectively connected with the lower computer; the upper computer is connected with the lower computer through a field bus. The system is used for collecting data by using a plurality of Atmega16 cores as cluster controller nodes, and carrying out information communication by using a RS-485 form with central nodes to make the data transferred to a central monitoring computer at real time so as to realize real-time monitoring on the production performance and the environment parameters of the layer house, such as the weight of layers, the feed intake, the water drinking, the excretion quantity, the excretion times, the egg laying time, the egg weight, and on the like. The system accurately, stably and continuously records each parameter of breeding, feedstuff, nutrition, and the like for poultries, and has special realistic significance to workload reduction and automatic environment detection and control of a layer house.
Owner:HEBEI AGRICULTURAL UNIV. +1

System and method for controlling fixed-height flight of fixed-wing unmanned aerial vehicle

InactiveCN102442424ASatisfied with low-altitude and fixed-altitude flightEasy to operateActuated automaticallyMicrocomputer systemEngineering
The invention discloses a system and a method for controlling fixed-height flight of a fixed-wing unmanned aerial vehicle, relating to the field of unmanned aerial vehicle control. By using the system and the method, a barometric height sensor is used as a height measuring element, an external lithium battery is used for supplying power to the whole system, and the sensor is protected by using a wind filtering device to reduce the influence, caused by wind pressure at a high altitude, on the sensor so that errors are reduced. After related information is measured by the barometric height sensor, an I2C bus (internal integrated circuit bus) transmits data to a single-chip microcomputer system, a series of data calculations are performed in a single-chip microcomputer to obtain corresponding height information; and finally, an elevating rudder and a gasoline throttle on the plane are linked together for PD (proportional plus derivative) control so as to control angle changes of a steering engine and the size of the gasoline throttle, and a height over-ascending and over-descending protection program is added in the programs to further improve the safety and realize autonomous height fixing of the unmanned aerial vehicle. The system has the advantages of low cost, small error, stable structure, small interference from external environment, easy implementation and the like.
Owner:BEIJING UNIV OF TECH

Hologram Recording and Reproducing Method, Device and System

A hologram device includes: a support section that keeps hold of, to be able to be attachable and removable, a hologram record carrier including a hologram recording layer stored therein with an optical interference pattern of a coherent signal light and a coherent reference light as a diffraction grating; a light source that generates the coherent reference light; a signal light generation section that is disposed on an optical axis, and generates the signal light by modulating the reference light in accordance with recording information; and an interference section that is disposed on the optical axis, and forms the diffraction grating being the optical interference pattern inside of the hologram recording layer by directing the signal light and the reference light toward the hologram recording layer. The signal light generation section is provided with a spatial light modulator, and the spatial light modulator is configured by a center are a disposed on the optical axis for passing through or reflecting the reference light with no modulation, and a spatial light modulation are a disposed around the center are a for generating the signal light by modulating the reference light in accordance with the recording information. The reference light is propagated on the optical axis, and the signal light is propagated around the reference light with spatial separation therefrom. The interference section includes an objective lens and an optical device, and the objective lens and the optical device gather the reference light at a first focal point, and the signal light at a second focal point being different from the first focal point.
Owner:PIONEER CORP
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