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760results about How to "Avoid misjudgment" patented technology

Method for quickly and accurately detecting and tracking human face based on video sequence

The invention discloses a method for quickly and accurately detecting and tracking a human face based on a video sequence, which relates to the technical field of mode identification. The method comprises the following steps of: 1, extracting a video frame image from a video stream; 2, preprocessing the video frame image, namely compensating light rays, extracting skin color areas, performing morphological processing and combining the areas; 3, detecting the human face, namely representing the human face by using Harr-like characteristics and detecting the human face by using a cascaded Adaboost algorithm with an assistant decision function; 4, establishing the characteristics of the human face, namely detecting the area characteristics of the detected human face and the shape characteristics of the edge profile of the human face; 5, tracking the human face, particularly tracking the human face by using a human face area characteristic model when an intersection does not occur in a human face area, and further matching when the intersection occurs according to the shape characteristics of the edge profile of the human face; and 6, extracting the sequence of a human face image. By the technical method, the human face can be detected and tracked quickly and accurately on the basis of the video sequence.
Owner:云南清眸科技有限公司

Inter-class variance based MODIS forest fire point detection method

The invention provides an inter-class variance MODIS forest fire point detection method, which comprises the following steps: pretreating original data required from an MODIS satellite receiving station, acquiring brightness temperature or reflectivity of each channel, and excluding illegal data; identifying image elements of cloud and water; identifying a smog mask; extracting potential fire points from excluded image elements of the cloud, the water and the illegal data; calculating inter-class variance yield of each potential fire point and effective background image elements in a background window; verifying fire points according to the threshold value of the inter-class variance and the smog mask; and outputting an MODIS image containing the fire points. By adopting lower threshold value, the potential fire points comprise true fire points as well as comprise certain false fire points of which the underlying surfaces have higher temperature so as to avoid omission; the threshold value of the inter-class variance is adopted to judge and remove the false fire points so as to prevent from being misjudged; moreover, information of the underlying surfaces around the fire points is considered fully, so that the method can adapt to different areas and seasons.
Owner:UNIV OF SCI & TECH OF CHINA

Automatic test system for digital integrated circuit

The invention discloses an automatic test system for a digital integrated circuit. The automatic test system is composed of a tested chip, a test interface board, an integration module, a test module, a control module, a display module and an upper computer. The control module is connected with the upper computer. The test module is connected with the control module. A base pin of the tested chip is connected with the test interface board which is connected with the test module. The integration module is connected with the test module and the upper computer. The display module is connected with the control module and displays a waveform after final comparison by the aid of upper computer software, so that the automatic test for functions and performance of the chip is completed. The automatic test system is low in cost, easy to implement under laboratory conditions, easy and convenient to operate, high in development rate and capable of meeting the test requirements of small-batch products. According to the system, through an automatic test, the problem that operation is complex due to the fact that the number of test items is large in a manual test is solved, the test efficiency is enhanced, a misjudgment caused by artificial factors in the manual test is avoided, and therefore test quality is improved.
Owner:INST OF ELECTRONICS CHINESE ACAD OF SCI

Integrated docking and adding device and docking method

ActiveCN105083592ARealize a rigid connectionGuaranteed passiveCosmonautic component separationEngineeringElectromagnet
The invention discloses an integrated docking and adding device. The integrated docking and adding device comprises a driving part and a driven part, and a layout form of a center and a periphery in a circle is adopted; a center rod is flexible, and after soft docking is realized, three groups of rigid rods uniformly distributed at the periphery are in rigid connection; when the initial docking of the flexible center rod is completed, and declination of two spacecrafts in the pitching/yaw direction is corrected, declination of the spacecrafts at lateral (radial) positions is corrected; when the initial docking of three side rods is completed, the rotating declination of the two spacecrafts is corrected, and the rigidities of the two connected spacecrafts are provided; the center rod has functions of limitation and control in extending movements and retracting movements, and after the center rod extends in place, a feedback signal is provided by a Hall proximity switch; the center rod and peripheral rods are unlocked by electromagnets. According to the integrated docking and adding device, the Hall proximity switch is arranged at the top end of the flexible rod, so that an erroneous judgment of locking is prevented, and a driven end is guaranteed to be passive.
Owner:BEIJING INST OF SPACECRAFT SYST ENG

Segmentation self-adapting hill climbing method and system applied for tracing maximum power of photovoltaic cell

The invention provides a segmentation self-adapting hill climbing method and a system thereof applied for tracing maximum power of a photovoltaic cell. The method comprises: finding the zone of the current power by partitioning the output power of the photovoltaic cell and comparing power difference of two adjacent moments with a set value; then, adjusting duty cycle to measure the power of the next moment until the maximum power point is found. The system of the invention comprises a photovoltaic cell, a DC/DC converter and a plumbic acid storage battery which are connected by circuits in sequence, wherein, a circuit between the DC/DC converter and the plumbic acid storage battery is provided with a voltage detecting module and a current detecting module, the output ends of the voltage detecting module and the current detecting module are respectively connected with a microprocessor, and the output end of the microprocessor is connected with the DC/DC converter via an isolation/ driving circuit. The invention quickens the tracing speed of the maximum power point, improves the anti-interference performance of the system, quickens the self-optimizing process of the maximum power point of the system and decreases the oscillation of the system at the maximum power point.
Owner:SOUTH CHINA UNIV OF TECH

Data index exception monitoring method and system, storage medium and electronic equipment

The invention discloses a data index exception monitoring method and system, a storage medium and electronic equipment. The data index exception monitoring method comprises the following steps that: obtaining a data index which needs to be monitored and the historical data of an associated data index corresponding to the data index which needs to be monitored; according to the data index which needs to be monitored and the historical data of the associated data index, generating a scatter diagram; according to the data index which needs to be monitored, the historical data of the associated data index and the scatter diagram, through a quantile regression algorithm, selecting an upper tail, a lower tail and a median, and taking the upper tail, the lower tail and the median as parameters togenerate a learnt monitoring sample model through machine learning; and comparing a data difference between the data index which is obtained in real time and needs to be monitored and the monitoringsample data, and carrying out exception detection on the data index which needs to be monitored, wherein the exception detection on the data index which needs to be monitored comprises exceptional fluctuation point detection and exceptional fluctuation tendency detection.
Owner:携程旅游信息技术(上海)有限公司

On-line diagnosis and control method for knockings of internal-combustion engine

InactiveCN102735395AAvoid misjudgmentOvercome the Neglect of the Frequency Characteristics of the Pressure in the CylinderElectrical controlMachines/enginesRise ratePeak value
The invention belongs to the technical field of an internal-combustion engine and relates to an on-line diagnosis and control method for knockings of the internal-combustion engine. The on-line diagnosis and control method comprises the following steps: utilizing a sensor for a pressure in a cylinder and a photoelectric encoder to synchronously determine a crank angle signal of the pressure in the cylinder of an engine; analyzing by introducing the determined signal into an on-line diagnostic processor for the knockings of the engine; adjusting a work load of the engine, so as to cause the engine to work in a low-speed heavy-load work area in which the knockings are easy to generate; on-line comparing an analysis result of the processor and judging whether a pressure peak under each crank angle, a rise rate of the pressure in the cylinder, an oscillating feature of the pressure in the cylinder and a frequency feature of a knocking center exceed respective preset knocking threshold values or not; confirming whether the engine is subjected to knockings or not according to a final diagnosis result; and if the engine is subjected to knockings, timely adjusting the parameters of angular advance for engine ignition, air-fuel ratio, and the like, through EGU, and performing feedback control till the knockings are eliminated. According to the on-line diagnosis and control method for the knockings of the internal-combustion engine, the problem of the knockings of the modern internal-combustion engine is effectively identified and restrained under the conditions of promoted fuel economy and reduced low-emission of the internal-combustion engine.
Owner:TIANJIN UNIV

Indoor unit anti-freezing control method for air conditioner and air conditioner

The invention belongs to the technical field of air conditioners and particularly relates to an indoor unit anti-freezing control method for an air conditioner and the air conditioner. By means of theindoor unit anti-freezing control method for the air conditioner and the air conditioner, the problems that it is difficult for an existing air conditioner to accurately judge the freezing conditionof an indoor unit based on the temperature of an inner coiled pipe, and accidental errors are prone to occurring in an existing point sampling judgment method are solved. The indoor unit anti-freezingcontrol method comprises the steps that when the air conditioner is in a refrigeration working condition, the current average values of a primary indoor fan are obtained every other preset time interval; the degree of attenuation of every two adjacent current average values of the indoor fan is figured out; and whether to set the air conditioner to be in an indoor unit anti-freezing mode is judged according to the degree of attenuation. The current average values of the indoor fan are adopted as foundation parameters, judgment is conducted according to the degree of attenuation of every two adjacent current average values of the indoor fan, accordingly misjudgment caused by the fluctuation phenomenon of fan currents is effectively avoided for the air conditioner, and then judgment accuracy is effectively improved.
Owner:QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD +2

Intelligent limit intrusion monitoring system and monitoring center database

The invention discloses an intelligent limit intrusion monitoring system and a monitoring center database. The intelligent limit intrusion monitoring system comprises a data acquisition system, a monitoring center, an integrated management platform and an intelligent alarming device. The data acquisition system is used for acquiring state monitoring data in a monitoring region. The monitoring center is in communication connection with the data acquisition system and is used for analyzing the state of a monitoring objective in the monitoring region and determining an alarming objective and the danger level of the alarming objective in real time according to the state monitoring data and triggering corresponding guard signals according to the danger level. The integrated management platform is connected with the data acquisition system and the monitoring center and used for monitoring and managing on-site monitoring equipment of the monitoring region in a centralized manner. The intelligent alarming device is in communication connection with the monitoring center to achieve linkage and is used for giving out an early warning or an alarm according to the guard signals. Thus, by means of the intelligent limit intrusion monitoring system and the monitoring center database, natural disasters, unexpected accidents, unlawful entry and other foreign body limit intrusion events endangering safety operation of a railway can be accurately monitored, pre-warned and alarmed in time.
Owner:北京京天威科技发展有限公司

Hotspare method and system suitable for device for processing and forwarding IP media stream in real time

ActiveCN101631011AForwarding is not affectedMeet the requirements for receiving uninterrupted IP streamingSpecial service provision for substationError preventionCommunication interfaceMachining process
The invention discloses a hotspare method and a system suitable for a device for processing and forwarding an IP media stream in real time. The method comprises the following working steps that: (1) two devices are simultaneously accessed to a network, wherein one is configured as a main machine, while the other one is configured as a slave machine; (2) the main machine and the slave machine synchronously operate and simultaneously process the IP media stream; the main machine processes, forwards and outputs the IP media stream; the slave machine only processes the IP media stream without forwarding and outputting the IP media stream; (3) the main machine periodically sends a heartbeat signal to the salve machine through a heartbeat communication interface; and (4) the slave machine carries out real-time monitoring in a working state of the main machine through the heartbeat communication interface; when the slave machine detects the fault of the main machine, the slave machine immediately replaces the main machine and outputs the processed IP media stream; when the slave machine detects that main machine recovers to the normal state, the slave machine immediately stops outputting any IP media stream; and the main machine takes charge of the processing and the forwarding of the media stream again. According to the method and the system, when the main machine has the fault, the system can detect the problems and rapidly switch in time, has short response time and is in particular applicable to the hotspare requirement of IPTV and other live servers.
Owner:ZHENGZHOU SEANET TECH CO LTD
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