473results about How to "Avoid asking" patented technology

The invention discloses a program switching system, which is characterized by the following: the service platform transmits the stored user viewing information to monitor platform and program platform with program switching function separately; the program platform transmits the user viewing information to monitor platform, which monitors the program. The invention guarantees the accuracy and fairness of shared settlement for program and service platforms, which improves usability of program switching system.

The present invention is whole particle field measuring method and equipment based on laminar laser imaging and features that particles in test flow field are illuminated with orthogonal laminar laser beams and two CCD cameras are used to take the particle motion locus images both in the direction perpendicular to the flow field and in the direction parallel to the flow field separately. The equivalent diameters of particles are determined via particle image distinction and statistical analysis of covered pixels, and the particle motion speeds, including magnitudes and directions, are determined via the distinction and analysis of particle motion locus image, so as to obtain the size spectrum and speed field distribution of particles in the imaging plane. The present invention needs no addition of tracing particle, and may be used widely in the two-phase and multi-phase flow field measurement in various fields.

The invention discloses a measuring method for length, width and height of a vehicle based on an RGB-D camera. The method comprises the steps of acquiring a clear vehicle image in a camera short-distance mounting manner, calibrating the camera according to a calibrating method based on a disappearing point, obtaining an internal parameter and an external parameter of the camera, realizing three-dimensional point cloud conversion of a vehicle target in a world coordinate system through a camera depth image solution, and acquiring three-dimensional coordinate information of the external surfaceof the vehicle; acquiring the three-dimensional coordinate of the external surface of the vehicle by means of prior knowledge and an image processing method, splicing a vehicle image according to sequence patterns in a vehicle motion process through a registering method, and realizing three-dimensional measurement to the profile of the vehicle. The measuring method overcomes defects of high equipment requirement and tedious operation in a traditional method and realizes high calibration precision. The actual displacement of the vehicle is comprehensively analyzed through a matching relation ofpoints which correspond with the same position of the vehicle in the image sequence, thereby realizing relatively high registering precision. The measuring method further has advantages of realizingaccurate splicing of the vehicle side surfaces, reducing vehicle length measurement error and improving accuracy in splicing the vehicle side surfaces.

The invention relates to a mode switching method and device and belongs to the field of graphic image displaying. The method comprises at least one displaying parameter is obtained, and the displaying parameter comprises at least one of the equipment type of media source equipment, the interface type of the media source equipment, the time sequence type of the media source equipment, environment light intensity, the type of current displayed content and the human face image of an observer; according to the at least one displaying parameter, a displaying mode matched with the current displayed content is selected; and an original displaying mode is switched into the displaying mode. User operation is simplified, so that a terminal always carries out displaying in a proper displaying mode, and the displaying effect of displaying equipment is improved.

The invention discloses a shaping mechanism for powder metallurgy spacer products. The shaping mechanism for the powder metallurgy spacer products comprises an upper punch. An upper punch hanging block is connected to the upper punch. A floating punch is movably connected to the upper punch hanging block and has a degree of freedom of movement relative to the upper punch hanging block. A cushion block used for storing the products to be shaped is arranged below the floating punch. Height check blocks are arranged on the edges of the cushion block and are higher than the cushion block. According to the shaping mechanism, the parallelism of the shaped products depends on the machining precision of the cushion block and the check blocks, the problem that when a mechanical press is used for shaping, the parallelism tolerance of the products cannot be controlled and is instable is solved, and the shaping capacity is greatly improved; the influence of the precision of the press on the parallelism tolerance of the products is eliminated, the requirement for purchasing a high-precision press is avoided, and the cost is reduced; in addition, multiple products to be shaped can be placed on the cushion block during one-time shaping, so that the shaping efficiency is greatly improved, and the defect that a hydraulic machine acts slowly is overcome.

The present invention relates to a method for electronic processing of online electronic fund transfers for charity donations, and more particularly the method comprises the steps of: providing information on a CBS website to receive user input settings, wherein user input settings are stored in a database; instructing users to return to their Bill Pay Site to select CBS, wherein CBS is a registered payee on a Bill Pay Site; sending electronic bills from the CBS host computer to user Bill Pay Site computers, wherein the payment amount is automatically entered for the user on the Bill Pay Site and stored on the Bill Pay Site computer; calculating monthly charity donation amounts, one EFT to each payee charity.

The invention relates to a multi-deformable mirror control method based on separation mode control and an optimization algorithm. By utilizing an influence function and a wavefront distortion mode of a deformable mirror, a control response equation used for optimizing an interference signal and a deformable mirror driving signal by adopting the optimization algorithm mode is established, and a wavefront distortion mode required to be corrected and correcting value are reasonably allocated for each deformable mirror. When the optimization algorithm is executed, target light distribution is taken as an evaluation function, the evaluation function and light beam quality are taken as the same criterion, and closed-loop control is carried out on each deformable mirror by adopting the light beam quality evaluation method, so that light beam criterion reaches up to the extreme value and effective control on the multi-deformable mirror is realized. The multi-deformable mirror control method disclosed by the invention has a simple system structure, the correction mode of each deformable mirror can be reasonably distributed, a wavefront correction stroke is effectively increased by adopting the existing deformable mirror manufacturing technology, and the multi-deformable mirror control method disclosed by the invention has expandability.

The invention discloses a transmission line fault locating method based on a reclosure. The method includes the following steps that (1) when a transmission line breaks down, and a circuit breaker is switched on for the first time, fault phase current is collected and pre-processed, a frequency spectrum is calculated by using a Prony algorithm, and inherent frequency dominant frequency f0 is extracted; (2) after the fault phase current i(t) is pre-processed through the step (1), the frequency spectrum of the fault phase current i(t) is calculated through the Prony algorithm, and the inherent frequency dominant frequency f0 of the fault phase current i(t) is obtained; and (3) a distance between a measuring end and a fault point is calculated, and locating of the fault point is achieved. On the basis of the existing fault distance location, fault location reconfirmation can be achieved effectively. By means of the transmission line fault locating method, correct seeking of the fault point is achieved, and reliable guarantee is provided for permanent fault property identification of the reclosure.

The invention provides equipment and a method for casting a plurality of aluminum alloy ingots with small diameters by using vertical direct chilling casting (DC) and relates to the equipment and the method for casting the aluminum alloy ingots, which aim to solve the problems of low consistency of metal temperatures, low water cooling uniformity and high possibility of ingot suspension or tension fracture and flow running in each crystallizer in the process of casting the aluminum alloy ingots with the small diameters by the conventional technology for casting the plurality of aluminum alloy ingots with the small diameters by using the vertical DC. The method comprises the following steps of: communicating all branch outlets on runners with a plurality of upper end inlets of hot top caps correspondingly one by one; communicating the lower end outlet of each hot top cap with a crystallizer inlet of the crystallizer, wherein the distances between a flow storage slot and the runners of all crystallizers are same; heating a heat preserving sleeve to the temperature of between 100 and 150 DEG C; opening the outlet of a smelting furnace, feeding molten aluminum alloy into all the crystallizers through the runners, and performing water cooling; stopping for 5 to 10 seconds after the liquid level of the molten aluminum alloy in the runners reaches a preset position; and moving an ingot guiding device downwards. The surface of each ingot is smooth, does not have cracks and has small segregation tumors, and each ingot does not have air pores, is not loose and has small grains.

The invention discloses an acoustic signal collection method based on compressed sensing, which can realize of reconstruction of the acoustic signal with high probability at a relatively low average sampling frequency, breaks through limitation of the Nyquist sampling theorem on the sampling frequency, and reduces requirements on the sampling performance of a sensor. The method has the advantages that: based on the compressed sensing theory, a novel random measurement mechanism is designed aiming at the characteristics of a real acoustic signal collection element, so that the difficulty in realization of hardware is greatly reduced; therefore, the acoustic signal collection element based on compressed sensing has real application values. The method is particularly applicable to an acoustic monitoring system based on a wireless sensor network, and can greatly reduce requirements on the sampling performance of the sensor and the wireless data transmission.

The invention discloses a formwork with a high cantilever structure and a construction method thereof. The construction method comprises following steps: utilizing angle iron at bottoms fixed at beam corners in a structure with N layers of beams as support points of a braced steel I-beam; welding and fixing top angle iron in middles of a steel I-beam with a cantilever structure; matching and buckling the top angle iron with corners of beams in n+1 layers; welding and fixing a support of the braced steel I-beam at the end portion of the steel I-beam with the cantilever structure or below by closing to the end portion; and pre-burying at least two round steel pressing rings in a floorslab in the N+1 layer during structural construction. Each round steel pressing ring is firmly welded with the steel I-beam with the cantilever structure or plugged and fixed by a wooden wedge. The high cantilever structure is characterized in that positions of cantilever members are high above the ground. The members with cantilever structures are long in cantilever span lengths and great in deflection produced by structural self-weight. The braced steel I-beam and a welding point position of a horizontal steel I-beam cantilever platform can be determined according to cantilever length. An optimal load-carrying position is within the range spacing from the outside of the span edge of the cantilever members.

The invention discloses a full-automatic slot incoming machine for a storage battery plate pack. The full-automatic slot incoming machine comprises a material receiving erecting mechanism, a mechanical arm mechanism, a reshaping mechanism, an equipping mechanism, a battery box jacking mechanism, a battery box output mechanism, a stand and a first guide rail arranged on the stand, wherein the material receiving erecting mechanism is arranged at the inlet of the stand; the reshaping mechanism and the material receiving erecting mechanism are arranged in parallel; the battery box jacking mechanism is arranged just under the reshaping mechanism and is arranged parallel to the material receiving erecting mechanism; the mechanical arm mechanism and the reshaping mechanism are arranged above the material receiving erecting mechanism and on the first guide rail; the output mechanism is arranged in the stand and transversely passes through the interior of the material receiving erecting mechanism and the battery box jacking mechanism. The full-automatic slot incoming machine can complete the working procedures such as material receiving, erecting, grabbing, arranging, reshaping, slot incoming and sending out of the plate pack, so that the production efficiency is greatly improved, and the defects of low in manual slot incoming efficiency, high technical requirement, high in harm of lead dust and the like, and difficultly guarantees technological requirement.

The invention discloses a vesica urinaria urine accumulation real-time monitoring method based on bioelectrical impedance. The method comprises collecting human body electrical impedance data through a testing electrode which is worn on a tested portion of a patient, and according to collected human body electrical impedance data, extracting a time domain feature of the human body electrical impedance data. The time domain feature at least comprises current electrical impedance value, current electrical impedance minimum differential value and current electrical impedance absolute value integral value. Vesica urinaria urine accumulation amount of the patient is calculated based on the time domain feature, the calculated vesica urinaria urine accumulation amount is compared with urine amount threshold value which is set for different patients in advance, and when the vesica urinaria urine accumulation amount achieves and / or exceeds the urine amount threshold value, an alarm is sent. The vesica urinaria urine accumulation real-time monitoring method can precisely forecast urine accumulation amount in the process of urine accumulation, and improves real-time monitoring precision of the vesica urinaria urine accumulation. The invention further discloses a vesica urinaria urine accumulation real-time monitoring device based on the bioelectrical impedance.

The present invention relates to a frequency modulation waveform marking method of time difference method ultrasonic flowmeter, and is used to measure the transmitting time of an ultrasonic signal in the fluid medium, thereby measuring the flow speed and the flow capacity of medium. The method provided by the invention has the following procedures: (1) frequency variation is overlaid on transducer operating frequency to form an emitting signal; (2) the emitting signal carries the information of flow speed when the fluid medium transmits; (3) signals are collected on a receiving transducer terminal; the frequency variation signals are demodulated and have related calculation with the original frequency variation signals in the procedure one; (4) according to the related function peak value, the signal transmitting time is calculated to gain the flow speed and the flow capacity. The frequency variation provided by the invention can be achieved through overlaying frequency deviation on transducer resonance central frequency; the frequency after overlaid is in the operation bandwidth of the transducer; the invention has the advantages of having no interference by signal amplitude fluctuation and flow and of achieving the signal transmitting time with high measuring precision.

The invention discloses a two-stage composite obstacle avoiding device of an automatic guided vehicle. The two-stage composite obstacle avoiding device comprises an obstacle testing module, a master controller and an obstacle avoidance execution module. The master controller is connected with the obstacle testing module and the obstacle avoidance execution module. The obstacle testing module comprises a visual testing unit used for detecting obstacles located within 3-6 meters and an ultrasonic testing unit used for detecting obstacles located within 0.02-2 meters. The two-stage composite obstacle avoiding device provides control information for parking, obstacle avoidance and other operation of the automatic guided vehicle, and the situation that the automatic guided vehicle collides with an obstacle, so that a vehicle body is damaged is avoided.

The invention discloses a low-emission solid organic waste treatment system realizing methane and active carbon production. The technical method of the low-emission solid organic waste treatment system realizing methane and active carbon production uses a waste crushing treatment system, an anaerobic digestion raw material pre-treatment and blending system, an anaerobic digestion reactor system, an anaerobic digestion residuum dehydrating system, an anaerobic digestion residuum carbonizing system, a carbonized gas collecting, heat-exchanging and purifying system, and a treatment water recycling system. The technical integration of the low-emission solid organic waste treatment system realizing methane and active carbon production is capable of finishing the optimal treatment of the biomass solid organic waste, and the final product is the clean energy methane and environment-friendly material active carbon. The partial required energy can be produced by the technical method, the energy recycling rate is high, and the treatment on the exhaust gas and effluent can be finished in the production link, the system is energy-saving and environment-friendly. By sufficiently considering the influence of various factors and the coherence among various links, the period of anaerobically treating the biomass organic solid waste can be obviously shortened, and the treatment efficiency of the organic solid waste can be sufficiently improved.

The invention relates to a system and method for tunnel water-bursting test under high crustal stress-osmotic pressure. The system comprises a main box used for simulating excavation of a tunnel model, the main box is of integrated structure and placed on a base, two opposite sides of the base are fixed on two slide rails, and an n-shaped counter-force frame is arranged between the two slide rails. The bottom ends of two support legs of the counter-force frame are fixed detachably on the slide rails. The top beam of the counter-force frame is fixedly connected with the top end of a loading system. An information monitoring element is arranged in the main box, the loading system and the information monitoring element are connected with a monitoring and controlling system. The monitoring and controlling system controls the loading system to apply crustal stress and osmotic pressure to the model material in the main box.Research on tunnel water bursting under the condition of high crustal stress-osmotic pressure engineering excavation turbulence is realized, and actual needs of the engineering are met.Further, fully automatic control of operation is realized and experiment operation is greatly facilitated.

The invention discloses a dynamic compaction quality remote monitoring system and a working method. An input end of a wireless signal emitter is connected with a dynamic compaction machine integrated operation parameter collection system. The output end of the wireless signal emitter is in wireless connection with a mobile receiving end. In the dynamic compaction machine integrated operation parameter collection system, an input end of a trigger is connected with a hammer hook, the output end of the trigger is connected with a GPS position information collection module and the dynamic compaction machine operation parameter collection module, the GPS position information collection module and the output end of the dynamic compaction machine operation parameter collection module are connected with a controller, and the controller is connected with a display, a memory and a timer. The beneficial effects are that precise measurement and real-time collection of compaction point position information, compaction frequency, compaction energy (rammer weight and rammer drop distance), compaction subsidence, accumulative compaction subsidence, compaction times and intermittent time between two times of compaction are achieved, labor and material resources are saved greatly, and the cost is lowered.

The invention relates to the connecting method of a metallic target and a target holder, essentially comprising the steps of connecting surface processing, brazing material coating and jointing, squeezing, bonding, etc. The target and the target holder are matched through corresponding boss and groove; when the target holder is heated to a temperature higher than the liquidus of the brazing material by 10 DEG C to 50 DEG C, the brazing material is coated at the combined face of the target and the target holder, and a pressure is forced at an axial direction, thus leading the target and the target holder to be matched closely; meanwhile, in the process of squeezing, all parts at the combined face are filled with the brazing material in a target holder groove, thus the rudimental air is exhausted. The steady connection between the target and the target holder can be realized in atmospheric environment by the method and the structure property and dimension of the target are not affected, thus the deformation problems in vacuum, high temperature, high pressure or other environments are avoided.

The invention provides an automatic door lock, comprising a lock shell having a dead bolt hole molded with dead lock hole; a lock assembly installed on the lock shell panel and the lock shell bottom panel corresponding to a molded lock installation hole; a bolt mechanism installed in the lock shell capable of moving along the direction perpendicular to the lock shell panel; a locking control mechanism for controlling the bolt in the bolt mechanism extruding from and retracting into the panel; and a bolt locking mechanism matched with the door handle operating mechanism. The automatic door lock implements engagement and disengagement of the stop member with a fixed stripe and a movable stripe by coupling of the fixed and the movable stripe, the stop member is capable of engaging with the fixed and the movable stripe at different positions, incomplete unlocking operation due to extrusion of a bolt partially retracted into the shell is prevented.

The invention discloses a full-digital hearing aid which comprises a digital signal processor. In the digital signal processor, at least two hearing compensation prescription modes undergoing corresponding hearing aid parameter programming or non-linear signal processing are preset according to typical non-linear hearing loss graph types of a target patient suffering from hearing impairment. The patient suffering from hearing impairment does not need special fitting services of a traditional digital hearing aid, can directly wear the hearing aid, chooses one hearing compensation prescription mode suitable for the hearing loss type and the hearing loss degree of the patient suffering from hearing impairment, adjusts volume in the hearing compensation prescription mode, experiences the hearing compensation effect according to self feeling, and can choose the hearing compensation mode and the volume, wherein the special fitting services of the traditional digital hearing aid include but are not limited to hearing tests and hearing aid programming and debugging. The full-digital hearing aid can meet the requirement for fitting of the patient suffering from hearing impairment and is wide in application range. The invention further discloses a hearing aid fitting method.

The invention discloses a capacitance flexure accelerometer with an adjustable scale factor. The capacitance flexure accelerometer comprises a quality detecting part, a pair of differential capacitors, a sensor, a computing module and a static executer. The quality detecting part is connected with a fixed framework through a flexible structure. The pair of differential capacitors comprises two moveable pole plates and two fixed pole plates. The two movable pole plates are formed by metal coatings on the two side faces of the quality detecting part, and the two fixed pole plates are symmetrically arranged on the two sides of the quality detecting part and right opposite to the two movable pole plates respectively. The two movable pole plates are connected with the input end of a sensor, the output end of the sensor is connected with the input end of the computing module, the output end of the computing module is connected with the input end of the static executer, and the output end of the static executer is connected with the two movable pole plates. According to the capacitance flexure accelerometer, the scale factor can be adjusted in a large scale, the capacitance flexure accelerometer can be widely applied to accelerometer gravity gradient instruments, and the horizontal movement acceleration noise along a rotary table plane and the angular acceleration noise along a rotary table rotating shaft are effectively restrained.

The invention discloses a construction method for hoisting a heavy type ultrahigh steel member. The construction method comprises the following steps: a, lofting the member; b, pre-burying foundation bolts; c, hoisting steel columns; d, correcting the steel columns; e, mounting column bracings; f, hoisting steel girders; g. mounting high-strength bolts. The construction method has the advantages of simple and convenient construction, short construction period, safety and reliability.

The invention relates to a digital preamplifier for an MEMS microphone, which comprises an Sigma Delta modulator and an MEMS polarization voltage generation module, wherein a first-stage integrator ofthe Sigma Delta modulator adopts a structure of a continuous time integrator, and various stages of integrators after the second stage adopt a structure of a switched-capacitor integrator; an input end of the continuous time integrator adopts a gate differential input circuit; and a wake source of the gate differential input circuit is connected with an integrating resistor and a feedback currentof the continuous time integrator respectively. The digital preamplifier meets the requirement of a new-generation advanced audio system on the input end, greatly promotes the anti-jamming ability ofthe conventional analog signal transmission path, improves the transmission quality of analog signals, and reduces physical space and design cost.

The invention belongs to the technical field of coal mine downhole railless auxiliary transportation equipment design and manufacturing and particularly provides a mining driving force self adoption multi-gear automatic speed changing double-motor steering drive axle. By adoption of the mining driving force self adoption multi-gear automatic speed changing double-motor steering drive axle, the problem that a mining electric drive vehicle cannot efficiently meet the demands of coal mine downhole complex and variable working conditions is solved. The steering drive axle comprises a water cooled middle double-drive anti-explosion motor, a first planetary reducing mechanism, a second planetary reducing mechanism, a differential mechanism, an axle shaft, an axle shell and an electronic control unit. The mining driving force self adoption multi-gear automatic speed changing double-motor steering drive axle simultaneously has the functions of driving, steering, automatic speed changing, active safety, travelling braking and parking braking, and mechanical control gear shifting devices, clutches, transmissions, transmission shafts, mechanical differential mechanisms and the like needed by traditional vehicles are omitted, so that a drive system and a whole vehicle are simple in structure and short in transmission chain, and transmission efficiency is improved.

The invention discloses a making method of 4-hydroxy-6-oxy-7-ethoxy-3-quinoline carboxylic acid carbethoxy in the coccidiostat domain, which comprises the following steps: A. preparing catechol diethyl ether; B. making .3, 4-diethyloxy nitrobenzene; C. making 2-ethoxy-4-nitrophenol; D. making 3-ethoxy-4-oxynitrobenzene; E. making 3-ethoxy-4-oxyphenylamine; F. preparing N-methylene ethyl malonate-3-ethoxy-4-oxyphenylamine; G obtaining the product.

The invention discloses a multi-RCA (rolling circle amplification) method based on split padlock probes. Each novel split padlock probe is about 90bp in length and comprises four parts, namely a detection arm, a universal primer area, an HhaI endonuclease site and a tag sequence area, wherein an amplification system is composed of a connection system and an RCA system. The concrete detection method comprises the steps of: firstly, carrying out coupled reaction, mixing a target sequence DNA (deoxyribonucleic acid) segment and four split padlock probes of which the final concentration is 1mol / L, hybridizing for 15 minutes after boiling and degenerating, adding T4DNA ligase and T4DNA ligase buffer solution, supplying 10 muL of reaction system; carrying out exonuclease I and exonuclease III exterior contact for 45 minutes at 37 DEG C, preparing an annular template and then carrying out RCA reaction; mixing, boiling and degenerating 10 muL of connection product and universal primer, respectively adding dNTP, phi29DNA polymerase, HhaI restriction enzyme and buffer solution to form 20 muL of reaction system, stewing for 60 minutes at 37 DEG C; finally detecting single-chain DNA product of RCA with a specific tag sequence, thus obtaining a corresponding test conclusion according to the result.

The invention provides a segmented magnetically programmed magnetic control hydrogel software robot comprising at least two interconnected motion units. Each motion unit comprises a first hydrogel anda second hydrogel. One end of the first hydrogel of one motion unit is bonded to the second hydrogel, the other end of the first hydrogel of one motion unit is bonded to the second hydrogel of the other motion unit, the first hydrogels and the second hydrogels are both magnetic control double network crosslinked hydrogels, and the direction of magnetic axes of the first hydrogels is opposite to the direction of magnetic axes of the second hydrogels. By changing the period of a cycle magnetic field, the first hydrogels and the second hydrogels produce different deformations in different directions. By programming the distribution direction of nanometer iron oxide in the hydrogels, differentiated design is carried out on the magnetic control hydrogel software robot, the flexibility of the magnetic control hydrogel software robot is greatly improved, and different action states of different portions of the robot can be effectively controlled.

The invention discloses an online setting calculation method for relay protection. The method comprises the following steps: carrying out online verification on the agility, the selectivity and the load-hiding capacity according to the online operating mode and the relay protection filed operating constant value of a power grid, wherein the constant value set is taken as an initial online setting calculation range; combining the online operating mode and carrying out online setting calculation by virtue of a setting calculation formula to obtain a calculated constant value; acquiring a limited value of the constant value in the calculation range by adopting the setting calculation formula according to constraint conditions matched with superior protection; and judging whether the calculated constant value is greater than the limited value or not, if so, ending, and if not, classifying the constant value of the superior protection into the online setting calculation range for re-calculating. According to the method disclosed by the invention, the online setting calculation range is quickly identified through online verification and early warning, the online setting calculation for the relay protection constant values in a full grid with potential safety hazards is quickly realized, so that problems in the prior art are avoided, workers can immediately make a constant value optimizing policy, and the operating risk of the power grid is effectively lowered.

The invention relates to a speed synchronous control method and system for a load simulator. The speed synchronous control system for the load simulator comprises a loading system, an inertia load and a tested position servo system; the inertia load is used for simulating the rotary inertia of the tested position servo system in actual work; the loading system is used for simulating the borne force or torque of the position servo system in actual work, and loading the force or the torque to the tested position servo system through inertia loading. After the adoption of the speed synchronous control method and system for the load simulator, the requirements of a structural invariance method based on velocity feedback signals, on high quality speed and acceleration signals, can be effectively avoided, and the problem of poor interference eliminating capability under large and middle load in the traditional speed synchronization method can be effectively solved.