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126results about How to "Improve system security" patented technology

Live face identification method and system

The invention discloses a live face identification method. The method comprises steps that video frame images shot by a camera are acquired; whether the video frame images are live face images can be identified through a trained convolutional neural network. The invention further discloses a live face identification system, the system comprise a camera module, an acquisition module and a live face detection module, wherein the acquisition module is connected with the camera module and the live face detection module, the acquisition module is used for sampling videos shot by the camera module to acquire the video frame images, and the live face detection module is used for detecting and identifying whether the video frame images are live face images through the trained convolutional neural network. The method and the system are advantaged in that brains of human beings are simulated through employing a depth learning neural network, whether the video frame images are live face images is identified through the trained convolutional neural network, whether the images are live faces or pictures can be identified through intuition of a computer to a great degree but not a designed algorithm, so algorithmic defects can be avoided, and identification accuracy is substantially improved.
Owner:PHICOMM (SHANGHAI) CO LTD

Self-adaption method of zero compensation detection of rotary transformer of permanent magnet motor

The invention discloses a self-adaption method of zero compensation detection of a rotary transformer of a permanent magnet motor. The rotary transformer detects the rotate speed, the direction of rotation and the rotor position of the permanent magnet motor; three current sensors respectively detect direct current bus current Idc, motor V-phase current Iv and motor U-phase current Iu, and rotor d shaft current Id and rotor q shaft current Iq are obtained by means of CLARK conversion and PARK conversion through a micro-programming controller; the permanent magnet motor is adjusted to be in a zero torque control mode, at the moment the Id equals to flux-weakening current and the Iq equals to zero; when a magnetic field of the permanent magnet motor is zero position alignment, the Idc is approximate to zero; in case that the zero position of the magnetic field deviates, the Idc is not approximate to zero; a rotary transformer deviation angle is regulated and rotated through the micro-programming controller until the Idc is approximate to zero and a rotor of the permanent magnet motor and a d shaft coincide. The self-adaption method can detect the accurate position of a motor rotor in real time, avoids a process of zero compensation manual calibration, improves torque control accuracy of a motor and system security, and is suitable for mass manufacturing of the motor.
Owner:SHANGHAI DAJUN TECH

Automobile engine control method based on digital twin technology

The invention relates to an automobile engine control method based on digital twin technology. The automobile engine is regarded as a physical engine in the actual working environment, based on the digital twin technology, a digital twin virtual engine model which is matched with the physical engine is built on the simulation platform, and the simulation working environment of the virtual engine model is configured; the physical data generated by the operation of the physical engine and the virtual data generated by the operation of the virtual engine model are received by digital thread and alarge plurality of heterogeneous physical data and virtual data are subjected to data analysis fusion processing; and according to the processing results, the virtual engine model is updated, and thecorresponding optimal control strategy under the latest model is obtained based on the physical engine calibration performance and the current state of the vehicle combined with online simulation technology, according to the optimal control strategy, the physical engine is controlled by the engine management system, and the virtual engine model and the optimal control strategy are updated with real-time feedback, so that the dynamic rolling data exchange is formed to realize dynamic optimal control
Owner:BEIHANG UNIV

Method and device for processing notification column message

The invention relates to a method for processing a notification column message. The method for processing the notification column message comprises the steps that when the notification column message about to be sent exists in an operating system, the notification column message is checked in an application framework layer of the operating system, so that information of the notification column message is obtained, and an application program layer of the operating system is noticed to monitor the information; the information obtained on the application framework layer of the operating system is monitored and obtained on the application program layer of the operating system, an instruction for processing the notification column message is generated according to the information, and the instruction is transmitted to the application framework layer of the operating system so that the operation system can be ordered to process the notification column message on the application framework layer according to the instruction. By the adoption of the method and device for processing the notification column message, a user can use third-party safety software to process the notification column message without the step that through cracking of the user terminal operating system, the highest authority of the operating system can be obtained. The method for processing the notification column message has the advantage that the safety performance of the system is improved.
Owner:BEIJING QIHOO TECH CO LTD

Novel high-strength high-compactness lightweight aircraft landing gear

InactiveCN106516087AWith double locking functionReliable double locking structureWheel arrangementsUndercarriagesLocking mechanismAircraft landing
The invention discloses a novel high-strength high-compactness lightweight aircraft landing gear. The novel high-strength high-compactness lightweight aircraft landing gear comprises a driving system, a main bearing rod, a locking mechanism and a damping system, wherein the driving system is arranged on the upper part of the main bearing rod; the main bearing rod is arranged between an aircraft fuselage and the damping system; the locking mechanism is arranged between the aircraft fuselage and the main bearing rod; the locking system comprises two identical kinematic chains which are not arranged in the same plane and respectively include a first kinematic chain and a second kinematic chain; the damping system is arranged on the lower part of the main bearing rod and comprises a damper and a pneumatic tire; and the lower end of the damper is connected with the pneumatic tire. According to the novel high-strength high-compactness lightweight aircraft landing gear disclosed by the invention, a conventional plane four-link landing gear is changed into a space four-link mechanism, and the reliable double-locking structures are a great contribution to the prior aircraft landing gear technology; and two sets of double-locking mechanisms are separated from each other and distributed symmetrically, and the safety of the aircraft landing gear is greatly improved by such a redundant design.
Owner:TSINGHUA UNIV

Sensing data access and transmission system and method based on IPv6 standardization of unmanned aerial vehicle

InactiveCN106789463AImprove the timeliness of data transmissionImprove system scalabilityTransmission systemsPosition/course control in three dimensionsSensing dataNetwork packet
The invention discloses a sensing data access and transmission system and a sensing data access and transmission method based on IPv6 standardization of an unmanned aerial vehicle. The system comprises a sensor load, an IPv6 standardized unmanned aerial vehicle carrier platform carrying the sensor load, and a ground remote control telemetering unit, wherein the ground remote control telemetering unit is connected with the IPv6 standardized unmanned aerial vehicle carrier platform in a wireless communication mode; the sensor load is used for collecting information, performing waveform conditioning and mode conversion on the collected information, and generating telemetering data; the IPv6 standardized unmanned aerial vehicle carrier platform is used for packaging and encoding the telemetering data and remote control data, and generating an IPv6 standardized network data packet according an appointed protocol; the ground remote control telemetering unit is used for controlling the posture and the air route of the IPv6 standardized unmanned aerial vehicle carrier platform, and also used for acquiring the telemeteirng data and the posture data of the unmanned aerial vehicle by analyzing the network data packet. According to the method based on the system, sensing data access and transmission of the IPv6 standardized unmanned aerial vehicle are achieved, data transmission timeliness of the unmanned aerial vehicle and the sensor carried by the same is improved, and the characteristic of global unique addressing is provided.
Owner:HUAZHONG UNIV OF SCI & TECH

Modeling quality monitoring method for model predictive controller (MPC) with drift interference

The invention discloses a modeling quality monitoring method for a model predictive controller (MPC) with drift interference. The method comprises the following steps: an interference model for a closed loop control system is built; according to the actual condition of the closed loop control system and a given control target, a dynamic model predictive controller (MPC) for a process is designed; the interference model and the MPC are adopted for controlling the closed loop control system, and process data obtained by operation of the closed loop control system are acquired; according to the structure of the closed loop control system, orthogonal projection is carried out on process output and process input data, and process estimation interference update is acquired; according to an established reference signal of the closed loop control system and the process actual output, the actual tracking error of the closed loop control system is acquired; according to the process estimation interference update and the actual tracking error, a model quality index for the closed loop control system is acquired; and according to the structure of the closed loop control system, the model quality index is used for monitoring the modeling quality. The method of the invention has the advantages of high feasibility, few consumed resources for processing, and high evaluation result accuracy.
Owner:HUAZHONG UNIV OF SCI & TECH

Thick plastered exterior wall outer heat-insulation system with double-layer gridding cloth compounded with foam cement boards

The invention discloses a thick plastered exterior wall outer heat-insulation system with double-layer gridding cloth compounded with foam cement boards. The thick plastered exterior wall outer heat-insulation system comprises an interface layer, a leveling layer, an adhesion mortar layer, a heat-insulation layer with the foam cement boards, an anti-crack protective layer with the inlaid double-layer gridding cloth and a finishing layer. The interface layer, the leveling layer, the adhesion mortar layer, the heat-insulation layer with the foam cement boards, the anti-crack protective layer with the inlaid double-layer gridding cloth and the finishing layer are sequentially fixedly connected with one another from the inside to the outside on the basis of a base-layer wall, joint filling and leveling heat-insulation materials are embedded in gaps of the foam cement boards in the heat-insulation layer with the foam cement boards, and the anti-crack protective layer with the inlaid double-layer gridding cloth comprises first gridding cloth, anchoring parts, second gridding cloth and three layers of anti-crack mortar. The thick plastered exterior wall outer heat-insulation system has the advantages that common quality problems of plate marks, anchor bolt marks, cracks and the like of a thin plastered system can be solved, the anchoring parts are assuredly positioned on the outer side of the gridding cloth, performance indexes of the wind load resistance, water absorption, impact resistance and the like of the outer heat-insulation system are increased, and the safety of the system is improved.
Owner:JIANGSU NIGAO SCI & TECH +1

Detection method for mismatching of model of closed-loop control system and object

The invention discloses a detection method for mismatching of a model of a closed-loop control system and an object. Closed-loop data of the current system is obtained during normal operation of an industrial process. A model quality index is obtained by utilizing the data. The matching degree of the model and the object is detected according to the values of the model quality index. The more the model quality index is approximate to 1, the higher the matching degree of the model and the object is. The model quality index is insusceptible of change of adjusting parameters of the controller and the change of an interference model. By adopting the method, the mismatching of the model and the object can be removed from other elements affecting control performance effectively and influence on the control system performance by the mismatching of the model and the object can be analyzed more clearly. Besides, by adopting the method for detecting the mismatching of the model and the object, no external excitation signals are needed to add during the industrial process in normal operation. The mismatching of the model and the object can be detected in normal operation condition of the industrial process, so that the system maintenance cost is reduced and the system safety is improved.
Owner:HUAZHONG UNIV OF SCI & TECH
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