49 results about "Mode number" patented technology

The disclosure relates to a method, apparatus, and recording medium for encoding an intra-prediction mode of an image using variable length codes, including: determining an intra prediction mode of a current block; determining an intra prediction mode having smallest mode number among intra prediction modes of encoded adjacent blocks as Most Probable Mode; generating and allocating variable length codes in ascending order from shorter code with higher similarity for directivity with MPM for all intra-prediction modes; and encoding intra prediction mode of current block based on allocated variable length codes, and thereby generates efficient variable length codes in consideration of high correlation in the intra-prediction modes of current block and peripheral blocks even if intra-prediction mode of current block does not match MPM derived with reference to peripheral blocks, and efficiently compressing information on intra-prediction mode of current block using variable length codes, thereby improving intra video encoding performance.

A computer-implemented method and a distributed file system in a distributed data network in which file metadata related to data files is distributed. A unique and non-reusable mode number is assigned to each data file that belongs to the data files and a directory of that data file. A key-value store built up in rows is created for the distributed file metadata. Each of the rows has a composite row key and a row value (key-value pair) where the composite row key for each data file includes the mode number and a name of the data file. When present in the directory, the data file is treated differently depending on size. For data files below the maximum file size the entire file or portion thereof is encoded in the corresponding row value of the key-value pair. Data files above maximum file size are stored in large-scale storage.

The invention discloses a rolling bearing fault diagnosis method based on improved variational model decomposition and an extreme learning machine. The method comprises: vibration signals of a rollingbearing under different types of faults are collected, the vibration signals are filtered by means of maximum correlation kurtosis deconvolution, parameter optimization is carried out on the maximumcorrelation kurtosis deconvolution method by using a particle swarm algorithm, and an enveloped energy entropy after signal deconvolution is used as a fitness function; the mode number of variationalmodel decomposition is improved by an energy threshold and improved variational model decomposition of the filtered vibration signals is realized to obtain mode matrixes of the corresponding vibrationsignals; singular value decomposition is carried out on the mode matrixes to obtain a singular value vector and a rolling bearing fault feature set is constructed; and the fault feature set is trained by using an extreme learning machine and a rolling bearing fault diagnosis model is established. Therefore, stable feature extraction of the complex vibration signal of the rolling bearing is realized, so that the diagnostic accuracy is improved.

A high-precision small modulus gear vision measurement method is disclosed. The method is characterized by after a CCD camera is calibrated, carrying out small modulus gear coordinate conversion, outputting an actual physical coordinate of a small modulus gear and calculating a correlation parameter coordinate scale factor, a rotation matrix and a translation matrix; reflecting a space position relation between a gear to be measured and a measurement system in the measurement system; carrying out image processing, wherein a processed object is a small modulus gear edge contour image acquired from a CCD camera 3; and carrying out denoising; then using and carrying out 1/8 sub-pixel edge extraction, extracting an edge point coordinate, carrying out center fitting and acquiring a center coordinate of the image; according to an edge point, acquiring a basic gear parameter, wherein the basic parameter is a tooth number, a mode number, a reference circle diameter and a pressure angle; fitting a standard gear contour curve; and comparing an actually-acquired edge contour curve with a theoretical contour curve so as to acquire a pitch deviation and a tooth profile deviation. The basic gear parameter and quality can be comprehensively analyzed and evaluated.

The invention discloses a method for generating multiple orbital angular momentum beams, and mainly aims at solving the problems that multiple orbital angular momentum vortex beams which radiate towards different directions and are the same or different in mode number cannot be simultaneously generated under a single working frequency in the prior art. According to the implementation scheme, the method comprises the following steps: selecting a feed source, a wave beam radiation direction and a geometric position of each reflecting unit; calculating a compensation phase matrix required by each super-surface reflecting unit according to the geometric position, the working frequency and the required orbital angular momentum mode; selecting electromagnetic super-surface units with different sizes to design a phase-shift network; putting the feed source at the central axial position of the electromagnetic super-surface and making an incident wave sent out from the feed source radiate the electromagnetic super-surface to obtain a compensation phase provided by the phase-shift network; and generating multiple orbital angular momentum vortex beams with vortex wavefronts in the set direction. The method can effectively improve the capacity and the coverage area of an orbital angular momentum wireless communication system and is used for modulating and multiplexing different signals in the wireless communication system.

This invention relates to a mode number converter of a structure suppressing input of common-mode shift composed of an input sample maintainance circuit, 6 stage allowance gain pipelines, 7 sub-mode number converters, 6 sub-digifax converters, a pipeline output synchronous circuit and a connected digit correction circuit, among which, the sample maintainance circuit applies a switch technology of grid boostrap and an independent internal input/output common mode voltage structure at the forefront of the entire pipe line, the 7 sub-mode number converters generate 14 bits data output to get the last 8 bits quantization digit output via the synchronous and digit correction circuits.

The invention discloses a personalized user short-term load forecasting algorithm based on a decision-making tree. The algorithm is characterized in that the algorithm comprises the following steps: carrying out fluctuating component identification on user load, and judging whether the sawtooth fluctuation thereof is obvious; if so, entering a fluctuating component extraction step, and then, obtaining power consumption mode number; and if not, directly obtaining the power consumption mode number. For the user, of whom the power consumption mode number is larger than 7, a nearest daily load forecasting method is adopted; for the user, of whom the power consumption mode number is within the range of 2-6, a user side short-term load forecasting method based on power consumption mode excavation is adopted; and for the user, of whom the power consumption mode number is only 1, a cluster forecast reduction method is adopted. According to the algorithm, by carrying out data mining on historical load of the user, the power consumption modes of the user are extracted; the personalized user short-term load forecasting algorithm is established according to the number of the power consumption modes; and therefore, accurate user short-period load prediction is realized.

The invention discloses a gearbox fault recognition method based on an improved empirical wavelet transform. The method mainly comprises the following steps: carrying out spectrum trend-improved empirical wavelet transform decomposition on vibration signals of an automobile seat horizontal driver gearbox to obtain various mode components; carrying out demodulation analysis on each mode component to obtain characteristic frequency; and comparing the characteristic frequency with rotation frequency of each gear in the gearbox to realize gearbox fault diagnosis. According to the technical schemeabove, with the advantages of high adaptability of EMD and strict WT theory being fully combined, frequency spectrum division is allowed to be more reasonable, each mode obtained after decomposition basically has no over-decomposition phenomenon, and the obtained each mode is more conducive to demodulation analysis, thereby improving gearbox fault detection precision and accuracy, and well solvingthe problem of need of presetting mode number in empirical wavelet transform and the problem of over-decomposition caused since spectrum division is too concentrated in the frequency band with largeamplitude in the signal spectrum.

The invention relates to a large-module screw taper gear processing lathe. Wherein, said lathe has X straight track and relative X sliding table; the crane has Z straight track 15 and relative beam; said beam has Y straight track and relative blade box; the blade box has rotational blade main axle mounted with blade; the X sliding table is mounted with work piece table mounted with screw taper gear; said table can be disc one or axle one. The invention has simple structure, high stability and high reliability.

The mode of execution of the invention relates to a method for coding and decoding an intra-frame prediction mode. The coding method comprises the steps of obtaining prediction mode numbers of a left edge block and an upper edge block in a current block separately; establishing a prediction list including five kinds of most probable prediction mode numbers of the current block according to the prediction mode numbers of the left edge block and the upper edge block; judging whether the optimal prediction mode number of the current block is within the prediction list or not; if so, only needing to code a few bit numbers; or otherwise, coding the adjusted optimal prediction mode number. The mode of execution of the invention also relates to a device for coding and decoding the intra-frame prediction mode. According to the method and the device for coding and decoding the intra-frame prediction mode, the problem of high code stream proportion of the intra-frame prediction mode in the video coding and decoding process can be solved.

The invention relates to a drive error measuring method for a close-toothed gear which is belonging to the field of precision technology and meter, mechanical drive. The method specifically is: firstly connecting the to-be measured gear, the driver, the first goniometric coder, the first shaft joint and the first electric motor respectively; then connecting the measuring gear, the flexible shaft joint, the second goniometric coder, the second shaft joint and the second electric motor respectively; the to-be measured gear and the measuring gear are joggled in the single side which are driven by two electric motors; detecting the measuring gear having the displacement phi <2> corresponding to the second goniometric coder, measuring gear shaft angle displacing the phi 1 and the to-be measured gear shaft angle displacement the phi', obtaining the drive error of the close-toothed gear after the calculation. The invention avoids the shortcomings that the close-toothed gear driving the big quality shaft and circular grating to re-rotate, and enhances the measuring precision and reliability of the measuring system, and solves the universal problems of single gear measurement for the close-toothed gear.

The dual-mode standby mobile phone has two standby modes- A and B- respectively used in two different networks. The method comprises: when said mobile terminal works at the currently-used mode A and receives an incoming call from a number in mode B, it prompts the incoming call to user; according to the user's selection, said mobile terminal is switched from mode A to mode B.

The invention provides a method for constructing a static and dynamic action stiffness model of an inclined suspension cable. The method comprises the following steps: step 1, describing a problem andestablishing a cable shape function; step 2, establishing a cable element motion equation; step 3, solving the motion equation to obtain a frequency response function; step 4, establishing static stiffness Kst; step 5, establishing a cable power coefficient; and 6, establishing a static and dynamic action stiffness model of the inclined suspension cable. According to the method, the dynamic characteristics, including damping and the minimum necessary vibration mode number, of the cable structure are fully considered, a multi-order vibration mode participated inclined suspension cable rigiditymechanical model is formed, modeling is convenient in numerical calculation, calculation efficiency is high, and the method is suitable for rapid assessment of structural post-disaster damage.

The invention provides a method for determining vibration mode number needed for calculating acceleration response through a mode superposition method and belongs to the technical field of structure earthquake response calculation. The method includes: performing mode analysis on structure to acquire vibration mode and frequency of the structure; calculating to acquire vibration mode participationcoefficient of the structure and acceleration contribution coefficient of the vibration mode at each order, and on this basis, acquiring accumulative vibration mode acceleration contribution coefficient; determining the vibration mode number needed for calculating the acceleration response according to the accumulative vibration mode acceleration contribution coefficient. For the problem of determining the vibration mode number needed for calculating the acceleration response of the structure through the mode superposition method, the accumulative vibration mode acceleration contribution coefficient is put forward to estimate acceleration response errors caused by mode truncation. The method has the advantages of simplicity and convenience in calculation and easiness in operation.

Provided is a gear shaving machining tooth form modification method. The method is characterized in that reverse cutting is conducted on a gear shaving cutter by means of a diamond dressing wheel, the tooth surface of the gear shaving cutter is concave, a gear is machined through the gear shaving cutter with the concave tooth surface, the concave phenomenon can be eliminated; the form modification comprises the steps that 1, the diamond dressing wheel is customized, the number of teeth of the dressing wheel is selected according to the specific mode number and tooth number of the gear product; 2, the dressing wheel is installed on a gear shaving machine to replace a workpiece gear, the dressing wheel is subjected to cutting machining by using the gear shaving cutter needing to be modified, and the tooth form surrounding the gear shaving cutter reference circle is concave; 3, nitridation treatment is conducted on the modified gear shaving cutter; the shape of the diamond dressing wheel is the same as that of the product gear, and the gear tooth surface of the customized diamond dressing wheel is coated with a diamond particle layer. By machining the gear through the gear shaving cutter modified through the method, the concave phenomenon in the tooth form obtained after gear shaving machining can be effectively solved, the yield of gear parts is guaranteed, and the use efficiency of the gear shaving cutter is improved.

The invention discloses a control method of community search compression modes of broadband code division multiple access systems, which comprises the following steps. Firstly, compression modes are mapped into compression mode sequences of the number equivalent to the total number of gaps of the compression modes and corresponding to the gaps. Secondly, whether collision is present in the compression mode sequences is inspected; in case of collision, the step 1 shall be returned to, or else, whether compressed frames of continuous three frames or more than three frames are present after sequence combination of the compression modes is detected; if the compressed frames are present, the step 1 shall be returned to; or else, the step 3 is accessed. Thirdly, corresponding timers are provided according to the number of the compression mode number; the timers produce corresponding compression mode time sequences according to corresponding compression modes. Fourthly, operation of corresponding hardware is dispatched according to the compression mode time sequences. According to the technical proposal, central control method is adopted for the community search compression modes. The invention is characterized in that software and hardware resources of the system can be saved; and the invention is applicable for independent operations of search for and measurement of resources in communities.

The invention discloses a matched tooth designing method of a torque-branching transmission gear train and aims at solving the technical problem of poor operability of existing designing methods. The technical scheme is that unified matched tooth conditions are firstly established, all of tooth number combinations and an installing angle list are provided according to a matched tooth formula, the tooth number combinations and installing angles are confirmed according to transmission ratio of various gears, mode numbers of various gears are confirmed according to intensity check and geometric constraint, finally the correctness of design results are checked according to the matched tooth formula, checking whether gear teeth and gear bodies are interfered or not is performed through accurate plotting, and the operability is strong.

The invention discloses a multifunctional manual horizontal shifting docking trolley comprising a bed and a chassis lifting device. Guide rails are arranged on two sides of the bed, the lower sides of the guide rails are provided with racks, and the mode number of the racks is equal to the that of small and large gears; a moving handle is fixed to the bed through a handle installation block; an insulation plate is fixed to the bed through an insulation plate installation block below the guide rails, and a cushion is placed on the insulation plate; belt rolling shafts are located at two ends of a guardrail, and the belt stretches to drive the connected cushion to move horizontally and longitudinally; an airplane wheel is arranged at the lower end of the bed; the chassis lifting device is provided with a corresponded airplane wheel guide rail and comprises a lifting handle, a transmission rod connected to the lifting handle for lifting and four trundles. The trolley adopts the gears and racks for operation, the applied force is even, the structure is prevented from deformation after long term usage, the accuracy guarantee is fine, operation is facilitated, stable and force saving, and precise time is saved in first aid.

A method for determining the number of modalities of variational mode decomposition comprises the following steps: S1, initializing variational mode decomposition parameters, carrying out one-layer decomposition on a signal, and obtaining the center frequency of the first-layer decomposition; S2, adding 1 to the modal number K, and repeating the step S1 to obtain the center frequency of the Kth layer of decomposition; S3, calculating errors of all decomposed center frequencies of (K-1)th layer and Kth layer, and finding out stable center frequencies; S4, calculating an average value of the stable center frequencies, and finding out a dominant center frequency; s5, judging whether number of dominant center frequencies obtained by decomposition of Kth layer is greater than that of dominant center frequencies obtained by decomposition of (K-1)th layer; and if yes, repeating the steps S2 to S2; if not, stopping decomposition, and determining the number of modes as the number of dominant center frequencies. The invention aims to provide a simple, feasible, accurate and effective mode number determination method for variational mode decomposition, and the accuracy of variational mode decomposition and the effect of fault signal analysis are improved.

The invention discloses a task scheduling method based on multiple processors. An implementation scheme of the invention is that 1, a processor number and a mode number on which a computer application is based are acquired, a corresponding mode switching schematic diagram is obtained, and tasks in the computer application are classified and are sorted according to deadlines; 2, MD tasks are subjected to processor matching limitation and task utilization rate limitation, a lower bound of a handoff delay is limited, and a minimum handoff delay and an optimal scheduling scheme are obtained; 3, for an unreasonable handoff delay, the minimum handoff delay and the optimal scheduling scheme are continued to be obtained, and if the handoff delay is reasonable, a next step is continued to be executed; and 4, for each mode in a system, according to the minimum handoff delay of each mode, a total minimum handoff delay of the system is obtained. According to the task scheduling method disclosed by the invention, based on the multi-processor system, the application can have a higher operation speed, higher efficiency and a longer operation service life. The task scheduling method disclosed by the invention can be used for engineering scheduling and a computer instruction scheduling system.

Provided is a totally-closed electronic remote control safety anti-theft system. The totally-closed electronic remote control safety anti-theft system comprises an electronic signal receiving controller, a lock unlocking and locking mechanism and an external remote control, and further comprises a DC/DC stabilized voltage supply circuit and a power voltage stabilizer, a linear reciprocating reducer of the lock unlocking and locking mechanism comprises a threaded rod, a reciprocating traveling nut block, the reciprocating traveling nut block is connected with the moving end of a moving tooth block through a connecting pin and a connecting rod, the moving tooth block is provided with tooth-shaped protrusions, the mode number of teeth of tooth spaces of an inner ring gear is equal to the mode number of the tooth-shaped protrusions, a locating hole of the moving tooth block is formed in the bottom end of a movable locating shaft of a brake shoe of a brake disc, and can rotate around the movable locating shaft, the input end of the electronic signal receiving controller is connected with the output end of the DC/DC stabilized voltage supply circuit, and the output end of the electronic signal receiving controller is connected with the input end of a motor. According to the totally-closed electronic remote control safety anti-theft system, no external locks exist, an integrated electronic signal receiving and control system installed on the brake disc on the inner side of a brake drum is used for having control over the lock unlocking and locking mechanism so as to achieve locking and unlocking of the hub of a wheel.