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826results about How to "Easy to calculate" patented technology

Control method of electronic expansion valve in air conditioner system

The invention relates to a control method of an electronic expansion valve in an air conditioner system. The control method comprises: (1) detecting intermediate temperature T1 of an evaporator and outlet temperature T2 of the evaporator when the air conditioner system is in a refrigerating mode; and detecting intermediate temperature T4 of a condenser and outlet temperature T5 of the condenser when the air conditioner system is in a heating mode; (2) calculating degree of superheat delta T, wherein the degree of superheat delta T =T2-a*T1+b when the air conditioner system is in the refrigerating mode and the degree of superheat delta T=T5-c*T4+d when the air conditioner system is in a heating mode; (3) detecting outer temperature T3 of the actual environment of the air conditioner system and setting a target degree of superheat delta Tr according to T3; (4) comparing the degree of superheat delta T with the target degree of superheat delta Tr, and enabling the control system to output control signals according to comparison results to exert PID control on the electronic expansion valve. The control method of the electronic expansion valve is convenient and accurate in calculation of the degree of superheat, is low in cost, can meet requirements of one-driven-one constant-speed variable frequency air conditioner systems and is suitable for constant-speed variable frequency multi-split air conditioner systems.
Owner:苏州爱科意智能科技有限公司

Micro-expression-based risk identification method and device, equipment and medium

The invention discloses a micro-expression-based risk identification method and device, equipment and a medium. The micro-expression-based risk identification method comprises: to-be-identified videodata are obtained, wherein the to-be-identified video data include at least two frames of to-be-identified video images; the at least two frames of to-be-identified video images are classified into abasic problem feature set and a sensitive question feature set; each frame of to-be-identified video image in the basic problem feature set is inputted into at least two pre-trained micro-expression recognition models for identification and corresponding standard expression recognition results are obtained; each frame of to-be-identified video image in the sensitive question feature set is inputted into at least two pre-trained micro-expression recognition models for identification and thus corresponding testing expression recognition results are obtained; and on the basis of the standard expression recognition results and the testing expression recognition results, a risk identification result is obtained. With the micro-expression-based risk identification method disclosed by the invention, problems of low result trustiness and poor auxiliary effect of the current risk control result can be solved.
Owner:PING AN TECH (SHENZHEN) CO LTD

Unmanned aerial vehicle aerial image defogging algorithm based on dark channel

The present invention discloses an unmanned aerial vehicle aerial image defogging algorithm based on a dark channel. The algorithm comprises the steps of: obtaining a dark channel image according to acolor foggy image, obtaining a global atmospheric light composition A according to the dark channel image, obtaining a coarse-transmissivity graph according to the dark channel image, performing downsampling of the coarse-transmissivity graph, performing guidance filtering, performing upsampling to obtain a fine-transmissivity graph, obtaining an initial defogging image according to the fine-transmissivity graph and the global atmospheric light composition A, and employing restriction contrast adaptive histogram equalization to perform local contrast enhancement of the initial defogging imageto solve the problems that the image is dark and highlights the local information of the original image after defogging of the dark channel and to be used for later image processing work. The unmanned aerial vehicle aerial image defogging algorithm is especially suitable for defogging operation of high-resolution foggy images shot by the unmanned aerial vehicle, can obtain more image detail points of the unmanned aerial vehicle while rapidly removing the fog images of the images of the unmanned aerial vehicle, can simplify computing and has good robustness.
Owner:西安因诺航空科技有限公司

Online monitoring method and online monitoring device of high voltage vacuum circuit breaker

Aiming at the condition that primary line current and voltage are not easily monitored by a sensor due to high voltage and large current when a high voltage circuit breaker works online, the invention provides an online monitoring method and an online monitoring device of a high voltage vacuum circuit breaker. The method comprises the steps of: using a displacement sensor directly connected with a moving contact of the high voltage circuit breaker to collect a stroke signal of the moving contact; calculating characteristic points on a stroke curve through a series of filtering and correction; and analyzing the characteristic points to calculate relevant parameters so as to judge the work condition of the circuit breaker online. The online monitoring method and device provided by the invention effectively monitor the high voltage circuit breaker online and can resist the monitoring environment of high voltage and large current. As the displacement sensor directly connected with the moving contact of the circuit breaker is just used as a unique signal collecting device in the invention, the problem of difficulty in implementation and high cost caused by the fact that high voltage resisting voltage or current sensors are needed to be used on a primary side line is solved.
Owner:NANJING NANZI XIDIAN ELECTRIC

Method for calculating integrated reach roughness considering local head losses

The invention belongs to hydraulics and river dynamics, and relates to a method for calculating roughness parameters for hydraulic calculation. The roughness is the major parameter for hydraulic calculation. The value of the parameter has a great influence on the hydraulic calculation result. According to the physical significance of on-way resistance and local resistance, the integrated roughness determination method comprehensively reflects the collaborative influence of the on-way resistance and the local resistance. The integrated roughness is obtained by calculating the roughness value reflecting shearing stress inside a reach and a local energy loss coefficient, and the integrated roughness calculation formula specified in the specification is obtained. According to the method, reach one-dimensional water flow numerical simulation calculation is facilitated, and the new method is provided for determining the reach roughness parameter lacking observation data. The method is feasible compared with a calculation result of a common water surface profile calculation method based on the Bernoulli equation. The method can calculate the integrated roughness of the specified reach, can also be applied to the roughness parameter value of unstable river hydrodynamic numerical simulation and has the quite important practical application significance.
Owner:HOHAI UNIV

Vessel movement monitoring and informing system and implementing method thereof

The invention discloses a dynamic ship monitoring information system, in which an AIS transmitter is arranged on a ship, an AIS receiver is connected with a monitoring server which is connected with a client terminal by a communication network which is internally provided with an operation processor and a memory which is used for memorizing the AIS ship information and electronic chart data. The realization method of the invention comprises the steps as follows: a matching data module is established; the ship information is called out of the AIS data module; whether the ship motion state and a triggering rule are matched or not is compared; the proportion of the chart is calculated; an electronic chart data module is called according to the proportion and the position so as to generate a local electronic chart background module; ship drawings are laminated on the local electronic chart background module so as to obtain a local ship chart; a data module to be informed is turned to; a sending path is selected and the local ship chart is sent to the client terminal. The dynamic ship monitoring system can conveniently calculate the local ship electronic chart, to which the ship the client pays attention, and transmit the local ship electronic chart to the client terminal, thus bringing intuitionistic dynamic ship information for the clients.
Owner:深圳国洋供应链有限公司

Water level collecting method based on image identification

The invention discloses a water level collecting method based on image identification. The water level collecting method is characterized in that an image identification method is adopted for identifying a water surface in a photograph and a specific reference point in the photograph and combining a center point of the photograph for calculating the water level height of the water surface. The forming of the photograph is an optical imaging process, so that each point in the photograph is corresponding to an object one by one. According to the water level collecting method, a projection relationship of a camera, the photograph and the object is utilized to establish a projection triangle, so that the water level height of the water surface is calculated according to the information, namely, the height of the reference point, the horizontal distance between the reference point and the camera, the height of the camera, and the like. According to the water level collecting method, the level of river water in a river channel is calculated by utilizing one photograph, so that the calculation for the water level of the river channel is more convenient and the construction cost of a gauging station and a hydrometric station can be effectively reduced.
Owner:北京艾力泰尔信息技术股份有限公司

Fish-eye lens correction method and device and portable terminal

The invention is suitable for the digital image processing field and provides a fish-eye lens correction method and device and a portable terminal. The method comprises the following steps: carrying out distortion correction on a fisheye image through an equidistant projection model to obtain an initial correction image, the image content of which is a calibration board; obtaining all angle pointsof the calibration board from the initial correction image, re-projecting angle point coordinates to the fisheye image to obtain rough angle point coordinate values of the calibration board in the fisheye image, and serving the angle points as feature points in the fisheye image; and carrying out iteration on the feature points in the fisheye image to obtain different parameter values within a preset parameter range, carrying out correction on the fish-eye lens through the equidistant projection model, and serving the parameter value obtained when the deviation amount is minimum as an accurate correction value of the fish-eye lens. The fish-eye lens correction method reduces preparation workload in the early stage, and is simple in operation process; a camera does not need to change position and angle; and the fish-eye lens correction method is wide in application range, does not need to set a lot of parameters, is simple to calculate, and meanwhile, realizes an accurate fisheye correction effect.
Owner:ARKMICRO TECH
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