2461results about How to "Avoid jitter" patented technology

The invention provides a method for obtaining related information about a media program containing an audio signal, comprising: an embedding step of embedding an audio watermark containing identification information of the media program into the audio signal of the media program; a transmitting step of transmitting the media program; a recording step of recording by a user a portion of the audio signal of the media program embedded with the audio watermark; an extracting step of extracting the audio watermark from the recorded portion of the audio signal to obtain the identification information and providing the identification information to a server storing the related information; and a related information providing step of providing the user with the related information about the media program according to the identification information from the server, wherein the embedding step comprises: identification information pre-processing step of performing a pre-processing on the identification information of the media program to obtain pre-processed identification information of the media program; echo delay array determining step of determining an echo delay array used in embedding a plurality of pairs of antipodal echoes into the audio signal; amplitude modulating step of modulating amplitudes of the plurality of pairs of antipodal echoes with the pre-processed identification information; echo repeating step of repeating the amplitude-modulated plurality of pairs of antipodal echoes; and echo embedding step of embedding the repeated and amplitude-modulated plurality of pairs of antipodal echoes into the audio signal along the echo delay array.

The invention discloses an intelligent control method of a driverless vehicle tracking a desired trajectory. The method is characterized by comprising the following steps of: establishing a body coordinate system, and determining the position information of the vehicle; calculating a membership degree function of a road curvature characteristic according to a radian value, and defining a fuzzy rule to calculate a decision output speed; according to the distance the vehicle runs for 1.5-2.5 seconds, searching for the trajectory points larger than the distance and closest to the vehicle in the coordinate sequence of the desired trajectory; calculating the moving curvature of the vehicle according to an adaptive proportion-differential-integral control algorithm formula; and finally judging whether the target point of the current control cycle is the last point selected from the road point sequence; if so, outputting a signal to a brake servo control system to start the brake to slow down the vehicle; otherwise, outputting a voltage signal by a controller local area network module to keep and control the accelerator opening so that the vehicle continues proceeding. Through adoption of the intelligent control method, the driverless vehicle can realize a function of tracking the desired trajectory, and has certain adaptability to the change of the road curvature characteristic.

A server is provided with a transmit buffer, a transcoder, and a redundancy encoder. The server is for transmitting streaming media to a client through a communication network. A control unit senses when the network is temporarily congested, and activates the transcoder and the redundancy encoder. The frames require fewer bits, and thus arrive in the client's de-jitter buffer without interruption, notwithstanding the network congestion. This prevents network jitter.

A transmission apparatus for use in fixed bandwidth communications and variable bandwidth communications. The transmission apparatus has a memory unit, which stores information contained in a frame and indicating the amount of data to be transmitted from a terminal device, a computing unit, which calculates a bandwidth amount to be assigned to the terminal device based on the data amount, and a transmission unit, which sends the calculated assigned bandwidth amount to the terminal device. The transmission apparatus is characterized in that the computing unit calculates bandwidth amounts to be assigned to different types of flow of which different transmission qualities are requested according to a priority level that is set to each flow type. The transmission apparatus is also characterized in that bandwidth is controlled by designating, instead of a necessary bandwidth amount, transmission starting timing and transmission ending timing, particularly for fixed bandwidth communication data.

The invention provides an image pickup system for machine motion control, which comprises a guide rail 10, a robot main body 20, a cradle head device 30, a video camera 40, a video camera control module 50 for controlling the video camera 40, a robot control module 60 for controlling the robot main body 20 and the cradle head device 30, and a machine motion control image pickup module 70 for performing coordinated control on the video camera control module 50 and the robot control module 60; wherein the robot main body 20 slides on the guide rail 10, the cradle head device 30 is arranged at atail end of a magic hand of the robot main body 20, and at least one video camera 40 is mounted on the cradle head device 30; and the guide rail 10, the robot main body 20 and the cradle head device 30 for a 9-DOF (degree of freedom) robot.

A three-dimensional (3D) image processing apparatus and method are provided for use with a 3D, image divided into a left-eye image and a right-eye image. The apparatus includes a disparity estimation unit estimating disparities between the left-eye image and the right-eye image; a horizontal movement determination unit determining a horizontal movement value for the left-eye image and the right-eye image using the estimated disparities; and a horizontal movement unit horizontally moving the left-eye image and the right-eye image based on the determined horizontal movement value. In the method and apparatus, a receiving end which receives and displays a 3D image can enhance 3D effects and reduce eye fatigue by adjusting the disparity of the 3D image.

The invention relates to a novel large torque piling machine power head hardened reducer. The reducer comprises an engine body, a cover body, a central gear, an output shaft and more than two groups of planetary transmission mechanisms, wherein two ends of the output shaft are respectively supported on the engine body and the cover body in a penetrating manner; the output shaft at one side of the engine body is in end connection with a grouting device system; the central gear is connected onto the output shaft in a penetrating manner and is arranged between the engine body and the cover body; the more than two groups of planetary transmission mechanisms are supported on the engine body by taking the output shaft as a symmetric center; the planetary transmission mechanism comprises an input motor, and first-stage and second-stage planetary transmission mechanisms; the input motor is connected to an inclined gear shaft which is arranged in the engine body and the cover body through the first-stage and second-stage planetary transmission mechanisms; and the inclined gear shaft is meshed with the central gear. By adopting the more than two groups of planetary transmission mechanisms, the running power of the reducer is shunted; the reducer can stably and safely run for a long time under the large torque in matched with the meshed inclined gear shaft and the output shaft through the combination supporting of a roller bearing and a plane bearing; and the reducer has the advantages of compact structure, stable running, shunted work load, little equipment abrasion, low noise and long service life.

The embodiment of the invention provides a spatial positioning method and device, electronic equipment and a computer readable storage medium, and relates to the technical field of the big data. The spatial positioning method can be applied to intelligent equipment comprising an image collection device and an inertial measurement device, and comprises the following steps: acquiring image collection device pose information corresponding to the current frame image; optimizing the image collection device pose information corresponding to the current frame image according to the image collection device pose information corresponding to a key frame image, feature point description information and the inertia information; and acquiring the spatial positioning of the current frame image accordingto the optimized image collection device pose information corresponding to the current frame image and the image collection device pose information corresponding to the key frame image. The spatial positioning precision and positioning effect can be improved through the spatial positioning method provided by the invention.

The invention discloses a Camare360 mobile phone photographic platform and an instant processing method. The Camare360 mobile phone photographic platform comprises a main interface module, a photographic effect module, an image processing module, an optical lens simulation module, an anti-vibration module, a segmental shrinking developing instant image processing module and an internet service module. A method for instantly processing a photo comprises the following steps of: executing a shutter button module; extracting and analyzing image data; and executing a multi-layer feedback queue algorithm, a high-speed image scaling algorithm, an MHDR fast algorithm, a simulated optical lens scattered aperture visual algorithm, an ABM3D-based image denoising algorithm and a high-speed color mixing algorithm. By a platform for instantly processing the photo by using a third generation (3G) mobile phone, the quality of mobile phone photos is greatly improved; artistic representation and artistic impact of mobile phone photography are greatly enriched; the complex processes are simplified to be integrated fully automatic operation; and a user can take various types of high-quality artistic photos as the user wishes.

A receiver for receiving an input signal (a clock-embedded data (CED) signal), in which a clock signal is periodically embedded between data signals, includes a clock recovery unit configured to recover and output the clock signal and a serial-to-parallel converter configured to recover and output a data signal. The input signal (the CED signal) comprises a single level signal in which the clock signal is periodically embedded between the data signals at the same level. The clock recovery unit is configured based on a delay locked loop (DLL) without using an internal oscillator for generating a reference clock signal.

The invention provides a lane changing control method and device of an autonomous vehicle and belongs to the technical field of automobile electronic control. According to the lane changing control method and device provided by an embodiment of the invention, in case of lane changing, an available region is determined first according a distance between an obstacle and the vehicle and current road condition; when an adjusted guide trajectory is within the available region, steering is available to be prepared, and the problem of steering wheel shaking due to repeated tries of lane changing is avoided; in addition, turn angle of a steering wheel is determined by means of a gradient descent method, the angle of the steering wheel is changed gently during lane changing, the problem that sudden increase in the transverse turn angle due to the traditional preview-follower algorithm leads to poor riding comfort is solved, and riding comfort of the autonomous vehicle is improved.

The invention discloses a quasi-close loop starting method of a brushless direct current motor free of a position sensor, namely a quasi-close loop three-stage starting method with rotor initial position accurate pre-positioning and optimization positioning in the acceleration process combined. Short-time pulse voltage vectors are exerted in a motor winding, the rotor position can be locked in a range within 60-degree electrical angles by detecting direct-current bus current, and rotor accurate pre-positioning is completed by electrifying a designated winding, detecting current and comparing the current on the basis of rotor position locking. After rotor position pre-positioning, rotors enter the optimization positioning and acceleration stage, current differentials serve as the phase change conditions in the threshold range so that the rotors are ensured to change phase accurately in the acceleration process, and a system is switched into a counter electromotive force operation state. Experimental results show that the quasi-close loop three-stage starting method is low in cost and high in reliability, and can ensure that the system is in the quasi-close loop working state in the whole starting process and cannot have step-out and starting failure.

Provided is an apparatus for transmitting/receiving communication and broadcasting data. The transmitting apparatus includes: a mapper for mapping inputted broadcasting data into a transport stream according to a predetermined standard; a broadcasting buffer for temporarily storing the mapped transport stream for multiplexing; a communication buffer for temporarily storing a communication data stream for multiplexing; a counter for measuring data rate information of a broadcasting stream inputted between two SYNC signals and outputting the measured data rate; an SYNC signal generator for generating an SYNC signal for synchronization between the transmitting apparatus and a receiving part and periodically transmitting the generated SYNC signal; and a multiplexer for multiplexing a communication stream, a broadcasting stream, and an SYNC signal.

The invention discloses a six-axis degree-of-freedom manipulator. The six-axis degree-of-freedom manipulator comprises a base, wherein the base is in transmission connection with a first transmission mechanism, a second transmission mechanism, a third transmission mechanism, a fourth transmission mechanism, a fifth transmission mechanism and a sixth transmission mechanism in sequence, wherein the six transmission mechanism is in transmission connection with a mechanical palm part. A series of functions such as welding, spraying and handling are combined, the newest servo control system is adopted, and a series of new functions which can meet the industrial production of users are developed on the platform. The conventional complex transmission process is greatly simplified in the aspect of mechanical transmission, and the characteristic that bevel gear mesh type transmission is generally adopted by the conventional six axes is cancelled, so that the manipulator has a compacter structure and higher transmission efficiency, is more accurate in control and can effectively prevent the situation of jitter due to joint movement.

The invention provides a method, device and multi-core processor system for realizing a self-adaptive lock, wherein the method for realizing the self-adaptive lock comprises the following steps of: when a new first thread attempts to acquire the self-adaptive lock, if the self-adaptive lock is idle, enabling the first thread to acquire the self-adaptive lock, and otherwise, enabling the first thread to enter into a self-rotation state or an energy-saving state according to the competition fierce degree of the self-adaptive lock; when the first thread is in the energy-saving state, enabling the first thread to wait for being awaken to enter into the self-rotation state, or when the first thread is in the self-rotation state, enabling the first thread to compete for the self-adaptive lock till the first thread gets the self-adaptive lock by competition and the operation of sharing resources protected by the self-adaptive lock is completed, and releasing the self-adaptive lock; and when the self-adaptive lock is released, if the thread is in the energy-saving state, awaking another thread in the energy-saving state, and enabling the thread to enter into the self-rotation state so as to enable other threads which are in the self-rotation state to compete for the self-adaptive lock together.

The invention discloses a method and a system for controlling data storage in a cluster file system and a method for creating a file. The cluster file system stores files by grouping storage nodes. The method for data storage comprises the following steps of: collecting and measuring binary load information containing I/O access load space utilization rate of each storage node in the cluster file system during interval period; measuring whether the load of the cluster file system is balanced or not according to the binary load information of each storage node; and migrating data of in cluster file system if the load of the cluster file system is not balanced.

The invention discloses an anti-shaking balance valve, which comprises a main check valve (2) and a sequence valve group, wherein the sequence valve group comprises a sequence valve (3) and a buffer control valve, a valve core (64) of the buffer control valve can be moved to an opening position from a closing position through drive of hydraulic oil output by the sequence valve (3), and the valve core (64) is at least located on the opening position, so that an output port (10) of the sequence valve (3) is communicated with a first port (7), the buffer control valve is provided with a buffer cavity, and the buffer cavity is communicated with the first port (7) through a buffer throttle hole (15). In addition, the invention further provides a telescopic control loop of a hydraulic cylinder and a hydraulic device. According to the invention, owing to buffer action of the buffer damping hole, the opening time of the valve core of the buffer control valve and the opening time of the main valve core of the sequence valve have a time difference so as to play an action of buffer, thus the flow peak value generated by load change is avoided, the flow change of the balance valve is stable, and the relatively effective vibration damping effect is realized.

The invention discloses an aluminum alloy workpiece additive manufacturing method implemented through friction stir welding. On the basis of an existing electric arc additive manufacturing aluminum alloy workpiece, the characteristic that aluminum alloy is soft in property is combined, after an aluminum alloy workpiece is manufactured from electric arc additives layer by layer, friction stir welding intensification treatment is conducted on each layer, and therefore, defects such as pass gaps, interlayer incomplete fusion, air holes and the like can be eliminated through friction stir weldingwhen each layer is manufactured. Compared with the pure electric arc additive manufacturing aluminum alloy workpiece, by means of the method, the structural state of the aluminum alloy workpiece obtained through additive manufacturing can be improved; the grains can be finer; second-phase grains are finer and are distributed more uniformly; and the dislocation density achieved in the aluminum alloy additive manufacturing workpiece is increased. Compared with existing friction stir welding intensification, grain refining and defect elimination are conducted on each layer of the workpiece so that the strength of the whole workpiece can be improved rather than only surface modification, namely surface intensification, is conducted.

A video signal receiver including a display synchronizing signal generation device and control method are disclosed. The video signal receiver includes: a video processor converting an input analog video signal into a digital signal; a display processor scaling the video signal converted at the video processor with an output resolution; a displaying unit displaying the video signal scaled by the display processor; a detecting unit detecting whether an input vertical synchronization signal (In V-sync) and an output vertical synchronization signal of the analog video signal match; a PLL (Phase Locked Loop) adjusting a pixel clock according to a detection result of the detecting unit; and a timing generating unit generating an output horizontal synchronization signal and the output vertical synchronization signal by use of the pixel clock adjusted by the PLL, and providing the generated output horizontal and output vertical synchronization signals to the display processor and the detecting unit. Accordingly, it is possible to prevent twitching and freezing of a screen, even though input and output frame rates do not correspond.

The invention relates to artificial valve prosthesis with a valve leaflet clamping device. The manual valve prosthesis comprises a bracket and an artificial valve, wherein the bracket comprises an auxiliary support clamping section and a valve sewing section; the artificial valve is fixedly connected to the valve sewing section; the auxiliary support clamping section is composed of a support bracket, a valve leaflet clamping device and an upper connection fixing section; the leaflet clamping device, the support bracket and the upper connection fixing section are integrally cut; a lower connection fixing section matched with the upper connection fixing section is arranged on the valve sewing section; the bracket is embedded and connected with the lower connection fixing section into a whole through the upper connection fixing section; one part of the valve leaflet clamping device is overlapped with the valve sewing section; the overlapped part is tightly attached to the outer surface of the valve sewing section in a natural state; a bump which protrudes outwards along the radial direction is arranged on a skeleton structure of the valve sewing section in the overlapped region; and a bending section which bends towards the axis direction of the bracket along the radial direction of the bracket is arranged on the valve leaflet clamping device or the support bracket or the upper connection fixing section.

The invention relates to a method for removing an oxidation layer on titanium and titanium alloy wires and a device thereof. The method includes the following steps: 1. straightening: a straightening machine is used for straightening the titanium and titanium alloy wires; 2. phosphorus removal: a steel wheel phosphorus removal machine is used for removing the oxidation layer on the surface of the titanium and titanium alloy wires; 3. polishing: a sand belt wheel polisher is used for polishing the surface of the titanium and titanium alloy wires. The device is sequentially provided from left to right with a pay-off stand (1), a clamping device (2), a heating device (8), a straightening device (3), two steel wheel phosphorus removal machines (13), sand belt wheel polishers (14), a guide and guard (6) and a vertical down drawing machine (7). On the basis of the present steel wheel phosphorus removal machine, the method is additionally provided with a heating device, a phosphorus removing and polishing machine, a cooling device, a dust removing device and a tension device, thereby forming a production line for removing the oxidation layer on a large and heavy titanium alloy wire, so as to reach the purpose of removing the oxidation layer and polishing.

The invention discloses a steering control system and a steering control method of a nine-shaft automobile chassis. The system comprises a mechanical drive device, a power-assisted steering device, a hydraulic drive device and a steering control device which are used for driving wheels to steer, wherein the mechanical drive device and the power-assisted steering device drive wheels on first, second, third, fourth and fifth steering shafts to steer respectively; sixth, seventh, eighth and ninth steering shafts are provided with medium locking cylinders and steering cylinders respectively; extended ends of each medium locking cylinder and each steering cylinder are connected with a steering knuckle arm of a corresponding steering shaft to form an interlocking mechanism; and the steering control device connects or disconnects oil inlet and oil return paths of a corresponding medium locking cylinder and a corresponding steering cylinder according to a steering mode and drives wheels on a corresponding steering shaft to steer. The mechanical drive device and the hydraulic drive device drive wheels on different steering shafts to steer respectively, so that various steering modes are provided. On the basis, the invention also provides a hoist using the steering control system.

In a communications system, data is multiplexed onto a transmission medium at a transmitter and demultiplexed from the transmission medium at a receiver. The clock applied to the transmitter and receiver is a multiplying delay-locked loop in which a delay line provides a multiplied clock which is applied back to its input. A delay adjustment circuit including a proportional phase comparator of low offset adjusts delay in the delay line.