55results about How to "Break through application limitations" patented technology

The invention discloses a method for determining the commutation failure of a high voltage direct current system, which comprises the following steps: S1 calculating the load component and the fault additional component of commutation voltage on a conversion bus of the high voltage direct current system when a fault occurs in a certain point thereof under a given fault close angle; S2 determining an integral interval and calculating the actual commutation voltage time area; S3 comparing the actual commutation voltage time area with the critical commutation voltage time area and determining whether the fault of the point can cause the commutation failure or not; S4 repeating the step S1 to step S3 and determining an alternating current fault region which causes the commutation failure of the high voltage direct current system. The invention further discloses a device for determining the commutation failure of the high voltage direct current system, which comprises a preparing unit, a calculation unit and a determining unit. The method and the device can greatly reduce the calculation scale, lead the precision to meet the needs of engineering applications, disclose the mechanism of how the fault close angle affects the commutation failure and be applicable to the analysis of fault steady state and fault transient state.

The invention relates to a dual-mode cloud air-conditioner system based on a Wi-Fi communication mode. The dual-mode cloud air-conditioner system based on the Wi-Fi communication mode comprises a cloud service platform, a Wi-Fi communication module, a cloud air conditioner and a mobile control terminal which are connected through a wide area network, wherein the cloud service platform is provided with a plurality of cloud service application modules, so that cloud services are provided for the cloud air conditioner and / or the mobile control terminal; the Wi-Fi communication module has two wireless topology networking modes of a basic network and an ad hoc network, the Wi-Fi communication module in the basis network is set in a station working mode through a dial switch, the Wi-Fi communication module in the ad hoc network is set in a wireless access point working mode through the dial switch, and a small wireless local area network is built by making Wi-Fi as a wireless access point; the cloud air conditioner contains protocols in half-duplex serial communication with the Wi-Fi communication module so that control information sent by the mobile control terminal can be received, and information of the cloud air conditioner can be fed back to the mobile control terminal.

The invention discloses an ionic flexible touch sensor. A sensor comprises a plurality of conducting layers, a plurality of insulating layers and two packaging layers. The mutiple conducting layers are arranged in a laminated manner. One insulating layer is arranged between every two conducting layers in a laminated manner and the two packaging layers are respectively packaged on the upper surfaceand the lower surface of the conducting layers arranged in the laminated manner; wherein the conductive layer is made of an ionic conductive flexible gel material, and the insulating layer and the packaging layer are respectively made of an insulating high-molecular polymer material. The ionic flexible touch sensor can be integrated with a contact position measurement module and a contact pressure / tensile force detection module. A complete set of complete structural design and manufacturing technical solution of the ionic flexible touch sensor is provided, and a product has the advantages ofhigh optical transparency, deep flexibility, low manufacturing cost, high position measurement resolution, high sensitivity and the like.

The invention relates to a medical test tube rack which comprises a locating plate, locating pipes and clamping parts. An annular groove is formed in the outer side wall of each locating pipe, and long-strip-shaped strip clamping holes are vertically and symmetrically formed in the portion, below each groove, of the side wall; each clamping part is provided with a circular buckle matched with the corresponding groove, strip clamping buckles which correspond to the strip clamping holes and are used for clamping test tubes are arranged on the circular buckles, the tail ends of the strip clamping buckles are folded inwards and can clamp the test tubes, and the strip clamping buckles are provided with sawtooth-shaped protrusions. According to the medical test tube rack, by means of exquisite design of the locating pipes and the clamping parts, the clamping parts are provided with the strip clamping buckles corresponding to the strip clamping holes of the locating pipes, and the strip clamping buckles are provided with the sawtooth-shaped protrusions; by means of the flexible connection mode of the clamping parts and the locating pipes, clamping force to the test tubes can be guaranteed, the cost is low, replacement of the clamping parts is convenient, the application range is wide, and wide popularization significance is achieved.

The invention belongs to the technical field of radar interference signal identification, and particularly relates to an active interference identification method based on a bilinear efficient neural network. The invention designs a more intelligent interference identification method to solve problems that the existing interference signal is difficult to identify under a low interference-to-noise ratio and depends on priori knowledge. According to the method, modeling analysis is carried out on various interference signals, the bilinear efficient neural network is adopted for recognition from the perspective of signal time-frequency images, and very high accuracy can still be obtained under the low interference-to-noise ratio. Simulation experiments prove that the bilinear efficient neural network is used for identifying the effectiveness of interference signals, and compared with a traditional mode of manually extracting features, the method is higher in precision and simpler and more convenient. According to the method, priori knowledge of interference signal characteristics is not needed, certain robustness is achieved under the low interference-to-noise ratio, and the application limitation of an existing radar active interference recognition method is broken through.

The invention discloses a blood vessel anastomat and an application method thereof. The convenience of the vascular anastomosis surgical operation is improved, and the technical risk of vascular tearing in the surgery is lowered. The blood vessel anastomat structurally comprises a fixed sleeve, a movable sleeve and a lock catch; a limit shoulder is arranged at one end of the fixed sleeve, and an anastomosis connection end is arranged at the other end of the fixed sleeve; the movable sleeve sleeves the sleeve wall of the fixed sleeve, and a hanging needle is arranged at the end away from the limit shoulder; an inner hole of the movable sleeve is matched with the cylinder wall of the fixed sleeve in a key and groove mode, and only has the motion degree of freedom of sliding in the axial direction of the fixed sleeve; the lock catch is made of an elastic material, is in an annular shape, and is provided with a locking part, and the shape of an inner hole of the lock catch is matched withthat of the anastomosis connection end. By adopting the blood vessel anastomat, the convenience of the vascular anastomosis surgical operation can be improved, the time of the vascular anastomosis surgery is reduced, the surgical risk can be reduced, and the surgical success rate is improved, so that the surgery is safer.

A method for improving compatibility of a stilbene-based biphenyl whitening agent and PP (polypropylene) plastic is as follows: 0.005-0.020 part of the stilbene-based biphenyl whitening agent is dissolved in a very small amount of solvent to obtain a whitening agent solution; the whitening agent solution is mixed with 1 part of stearic acid, 1 part of paraffin, 80-120 parts of PP (polypropylene) and 8-12 parts of PP-g-MAH to obtain a mixed material; the solvent of the PP plastic mixed material is evaporated; and thermoplastic molding is performed to obtain whitened PP plastic. Compared with the prior art, the method has the following characteristics: 1, the compatibility of a polar salt fluorescent whitening agent in the plastic PP is improved, the application limit of the polar salt whitening agent in plastics is broken through, the cost is low, the process is simple, and industrial application is facilitated; 2, the yellowing spot concentration of a fluorescent whitening agent in theplastic is improved, the whitening effect of the plastic is enhanced, and the thermal stability of the plastic is improved; and 3, a method is provided for application of the polar salt whitening agents in the plastic.

The invention discloses a method for preparing a thrombin / tannic acid multilayer film compound chitosan hemostatic sponge. The method comprises the following steps: preparing a chitosan porous sponge; assembling the thrombin / tannic acid multilayer film on the chitosan sponge by virtue of a layer by layer self-assembly method; standing the assembled compound sponge overnight for dehydrating and freeze-drying. By regulating the number of the thrombin / tannic acid bilayer, the thrombin drug loading capacity can be regulated and controlled, i.e., the hemostatic effect can be regulated and controlled; compared with the free state thrombin, the thrombin / tannic acid multilayer film compound chitosan hemostatic sponge can be used for greatly improving the storage stability of the thrombin, has the advantages of fast hemostasis speed and good effect, and is expected to be used for war wound and hemostasis of pre-hospital care.

The invention provides a distributed hydrology model multi-time flooding parameter calibration method based on DSS database reading and writing, and belongs to the technical field of hydrology model parameter calibration. The distributed hydrology model multi-time flooding parameter calibration method comprises the steps of 1, building a multi-target genetic algorithm eNSGA-II frame to be used forparameter multi-target optimization and calibration of an HEC-HMS model; 2, based on a parameter optimizing frame, utilizing a JAVA language to write individuals in a parameter species into a basin file to input model parameters, after the model is run, extracting a simulation result from a DSS database to be fed back to the frame to calculate the parameter individual adaptability to generate a new parameter species, so that coupling of the model and the parameter optimizing frame is achieved, and the whole parameter automatic calibration process is completed; 3, selecting an appropriate parameter input model in a Pareto solution set according to standards like whether parameter physical meaning conforms to drainage basin properties and evaluating precision of the simulation result or not. The application limit of the model is broken through, the calibration time and manpower are greatly saved, and the model is easily applied and popularized.

The invention relates to a transparent flexible conductive core board for a back-contact large-size battery assembly and a preparation method thereof, and belongs to the technical field of photovoltaic equipment. The transparent flexible conductive core board includes transparent conductive oxide adhered on a flexible polymer film substrate. The beneficial effects of the transparent flexible conductive core board are as follows: the transparent flexible conductive core board is richer in raw material, so that assembly cost can be greatly reduced; the transparent flexible conductive core boardcan be used for conventional assemblies, flexible assemblies and double-sided assemblies, so that the application limitation of metal conductive circuit core boards on back-contact batteries can be broken through, and wide application ranges can be achieved; the problems of the oxidation of the metal conductive circuit core boards can be avoided, the maintenance and storage costs of raw materialsand products can be reduced during storage and usage, and the reliability of the assembly can be enhanced; and less pollution to environments can be achieved, and the transparent flexible conductive core board is low in production energy consumption and larger in size, so that using requirements of larger photovoltaic assemblies can be met.

The invention relates to the field of preparation technology of paint with scratch-resistance and wear-resistance, and especially relates to nanometer ceramic paint for pre-painting of metal printing plates with rollers and a preparation method thereof. The paint comprises the following components in parts by weight: 70-80 parts of nanometer ceramic resin, 10-15 parts of a curing agent, 2-4 parts of a matting agent, 0.5-3 parts of a fluorocarbon surfactant, 25-35 parts of a solvent, and 1-5 parts of an additive. A special Si / O structure in the components has binding energy which reaches 101 kilocalorie / mol, a vitrescent three-dimensional net structure can be formed after high temperature roast during a later period, so that hardness of a paint film on the surface of a coating is equal to or higher than 6H; the paint film is not easy to scratch or wear, and has excellent incombustibility and insulating properties; application limitation of the prior printing decorative plates which are prepainted with rollers is broken, good compatibility to a fluorocarbon coating layer is formed, and the paint is suitable for coating metal base materials or base materials with the fluorocarbon coating layer.

The invention belongs to the technical field of electronic reconnaissance, and particularly relates to a passive radar signal detection method based on sequential statistical filtering and binary detection. According to the invention, after certain speed reduction and signal-to-noise ratio improvement are carried out on low-signal-to-noise-ratio signals in a large instantaneous monitoring bandwidth through channelization preprocessing, binary accumulation detection is combined, and rapid and accurate detection can be realized under a certain low-signal-to-noise-ratio condition. The method adapts to the trend that the sampling rate of a reconnaissance system in the passive radar field is higher and higher, and solves the problem that signal detection is difficult under the condition of low signal-to-noise ratio. On the basis of a relatively stable condition in a channel, a detection threshold is estimated by performing sequential statistical filtering processing on reference data in a parallel sliding window without additional threshold compensation; wherein the parallel pipeline type structure ensures that an adaptive constant false alarm threshold can be quickly obtained under strong noise, the detection and false alarm probability can be further improved by adopting a binary accumulation detection technology, so that the application limitation of an existing detection method is overcome.

The invention provides a hybrid resource configuration method for fog computing Internet-of-Things physical layer security. The method comprises the following steps: establishing a secure fog computing Internet-of-Things system model; initializing a quantum galaxy group and parameters; according to a designed quantum galaxy group evolution rule, evolving all quantum galaxes; measuring the quantum states of the updated quantum galaces to obtain the measurement states of all the updated quantum galaces, calculating the fitness of the measurement states, and updating the measurement states of all the quantum galaces and the global optimal measurement state of the quantum galaces according to the fitness value; and judging whether a termination condition is met. If the algebra of the current evolution is smaller than the set maximum number of iterations, i is made to be equal to i+1, and the third step is executed; otherwise, the evolution is terminated, and the global optimal measurement state of the quantum galaxy group is output, thereby obtaining a corresponding hybrid resource configuration scheme. According to the invention, the uplink secrecy capacity of the whole Internet-of-Things system is greatly improved, network data leakage is reduced, and the Internet-of-Things user is prevented from eavesdropping useful information by a malicious eavesdropper.

The invention discloses a method for preparing a thrombin / tannic acid multilayer film compound chitosan hemostatic sponge. The method comprises the following steps: preparing a chitosan porous sponge; assembling the thrombin / tannic acid multilayer film on the chitosan sponge by virtue of a layer by layer self-assembly method; standing the assembled compound sponge overnight for dehydrating and freeze-drying. By regulating the number of the thrombin / tannic acid bilayer, the thrombin drug loading capacity can be regulated and controlled, i.e., the hemostatic effect can be regulated and controlled; compared with the free state thrombin, the thrombin / tannic acid multilayer film compound chitosan hemostatic sponge can be used for greatly improving the storage stability of the thrombin, has the advantages of fast hemostasis speed and good effect, and is expected to be used for war wound and hemostasis of pre-hospital care.

The invention discloses a near-field and far-field source mixed direction finding method based on a quantum mouse group, and the method comprises the steps: constructing a separation operator on the basis of obtaining a far-field source angle, obtaining a far-field source fourth-order cumulant matrix through the operator, obtaining a pure near-field source fourth-order cumulant matrix through the difference of the fourth-order cumulant matrix, and carrying out a related process of parameter search through a quantum mouse group mechanism, so that the technical problems of angle ambiguity and low efficiency of a far and near field signal source separation method in the existing mixed source direction finding method are solved. According to the method, a relatively accurate mixed source direction finding result can be rapidly obtained, quantization errors do not exist, the array aperture can be expanded through the fourth-order cumulant matrix, the direction finding precision is improved, compared with a traditional near-field and far-field source mixed direction finding method, the speed is higher, the precision is higher, and the application limitation of an existing method is broken through.

The invention provides a communication method and device and a storage medium, and the method comprises the steps of responding to the received display information of a target application associated with first screen equipment, and determining the port identifier of second screen equipment associated with the target application; based on a pre-built corresponding relation, inquiring an equipment address corresponding to the port identifier; and sending the display information to a second screen device corresponding to the device address based on a pre-established long connection between the first screen device and the second screen device. According to the invention, communication between the first screen device and the second screen device can be realized; the application limitation of the communication scheme is broken through, the situation that the system broadcast message cannot be received due to the fact that the second screen device is offline and the like can be avoided, and the communication quality between the first screen device and the second screen device can be improved to a certain extent.

The invention discloses a self-adaptive help thread pre-fetch quality control method, and belongs to the technical field of multi-core cache performance optimization. The method can be used for improve the quality of help thread pre-fetch in irregular data intensive applications. Real-time online self-adaptive regulation of a help thread pre-fetch control parameter value can be achieved through the techniques such dynamic sampling, program operation stage detection, pre-fetch gain feedback, and self-adaptive regulation, and then the control quality of help thread pre-fetch can be improved. The method mainly includes the following steps: 1) dynamic information acquisition and feedback statistics; 2) index calculation; and 3) self-adaptive pre-fetch control. The method fully utilizes hardware information of a multi-core platform to achieve real-time pre-fetch control of a help thread, can be widely applied to access performance optimization, help thread pre-fetch quality control and sharing cache pollution control of the irregular data intensive applications in a current big data environment.

The invention relates to a double-dielectric-barrier low-temperature plasma synergistic catalytic treatment VOCs line pipe reaction unit. The unit is composed of an insulating medium kit, an inner electrode, an outer electrode, an end cover kit and a filling particle catalyst, the insulating medium kit comprises an inner pipe, an outer pipe, a perforated sealing plate and a threaded seat, the inner electrode is installed in the inner pipe of the insulating medium kit, one end of the inner electrode is connected with the threaded seat through a thread, an outer electrode is tightly attached tothe outer wall of the outer pipe of the insulating medium kit, one end of an outer pipe of the insulating medium kit is connected with the end cover sleeve through threads, and the other end is fixedly connected with a perforated sealing plate, and the filling particle catalyst is uniformly placed between the inner pipe and the outer pipe of an insulating medium external member, and is fixed in the reaction unit by the perforated sealing plate and the end cover external member to form an one-section cooperative structure. The one-section cooperative structure is adopted, the synergistic effectof low-temperature plasma and photocatalysis is fully utilized, the VOCs removal rate is high, and the yield of a byproduct O3 is low.

The invention discloses an anti-parallel thyristor drive circuit for pulse width modulation voltage. The anti-parallel thyristor drive circuit comprises a direct current power supply (1), a drive signal receiving circuit (2), a power amplification circuit (3), an RC snubber circuit (6), a first isolating optically coupled circuit (4) and a second isolating optically coupled circuit (5), wherein the drive signal receiving circuit (2) reads a signal for controlling enabling of a thyristor from the outside when working; the power amplification circuit (3) is used for conveying a thyristor enable signal into high and low level signals with load-carrying capacity; the first isolating optically coupled circuit (4) and the second isolating optically coupled circuit (5) are each used for generating one path of isolated and completely synchronized thyristor drive signal, and providing required drive current to two thyristor gate input interfaces of an anti-parallel thyristor; and the RC snubber circuit (6) absorbs and restrains impulse overvoltage in the switch switching process. The anti-parallel thyristor drive circuit is novel in circuit, safe, reliable, small in size and stable in work.

The invention discloses a virtual aperture MIMO radar target detection method based on two-dimensional block sparse recovery, and solves the problems of high distance sidelobe, poor small target detection performance and the like of a traditional virtual aperture MIMO radar. According to the method, a two-dimensional block sparse recovery method is adopted, and distance side lobes caused by incomplete orthogonality of waveforms are effectively inhibited by utilizing similarity and sparsity prior information of a distance-Doppler graph between virtual apertures in a target scattering information inversion problem; and the weak and small target detection performance loss caused by strong clutters and strong target side lobes is reduced, and the detection performance of the virtual aperture MIMO radar is improved.

The invention provides a manufacturing method of a super-strong bamboo fiber composite board. The manufacturing method includes the steps that bamboo fibers with the equivalent diameter of (0.2-0.5) mm and the length of (30-100) mm are blended with thermoplastic plastic short fibers according to the mass ratio of (70-30)%:(30-70)% to form a blended rope, and uniformly mixing is conducted on thermoplastic powder (80-20)% and bamboo fiber powder (20-80)% to form mixed powder. By means of the manufacturing method of the super-strong bamboo fiber composite board, a reinforced bamboo-plastic composite material is prepared by taking the blended rope as a reinforcing rib and taking the mixed powder as filler, so that the application limitation of a traditional bamboo material is broken through, the multifunction property of the bamboo fiber material is achieved, and the additional value of the bamboo fiber material is greatly improved.

The invention discloses primers and probe for detecting amount of gene expression of interleukin 17-5 of a pacific oyster by PCR. According to primer and probe nucleotide sequences, a forward primer is 5'-tccctggtccaccatcatg-3', a reverse primer is 5'-ggaacaccactgaggacttgg-3', and the probe is 5'-cgcgtcagctacc-3'. A fluorescent group added to the probe is 6-carboxyfluorescein. The accuracy and specificity of the primers and the probe are high, so the digital PCR technology is used for detecting the sequential variation of the interleukin 17-5 of the pacific oyster, and the result is used as anindex to evaluate the health status of the farmed pacific oyster. An established evaluation system has potential application value in early warning and prediction of diseases of farmed shellfishes, acontrol group or an internal control gene is not required, and the application limitation of a traditional fluorescence real-time quantitative PCR detection method is broken through.

The invention provides a color temperature chip for detecting an LED wall switch. The chip comprises a power supply management module, a chip logic control module, a filter and power failure detection module and a drive module. The chip is provided with (N+4) groups of pins, and comprises a VDD pin, a CAP pin, a GND pin, a CS pin, and N drive output pins D1, D2, D3, ..., Dn. The VDD pin is connected with the CAP pin through a PMOS tube back-to-back structure inside the chip. N output ends of the drive module are connected with N drive output pins D1, D2, D3, ..., Dn of the chip. According to the invention, a resistor, a diode and a capacitor component outside the chip are reduced on the original application system, which saves the application cost of the system; the chip can be used for a variety of isolated or non-isolated different applications, which breaks the application limitation of the original scheme; groups of selectable ports are arranged on the drive output end of the chip; a variety of different drive tubes are packaged in the chip, and different voltage withstand values can meet the needs of a variety of different applications; and the chip can be in drive connection with N LED light strings (N is greater than 2) to realize multi-channel drive control.

The invention relates to a ground subsidence monitoring system based on GNSS and InSAR. The ground subsidence monitoring system comprises a plurality of monitoring stations arranged at different places in a to-be-monitored area, a base station arranged in a geological stable area outside the to-be-monitored area, and a monitoring early warning center. The monitoring station is used for monitoring land subsidence of a monitoring point based on GNSS and InSAR to obtain a first monitoring result, and sending the first monitoring result to the monitoring and early warning center; the base station is used for carrying out ground subsidence monitoring on a reference point based on the GNSS to obtain a second monitoring result, and sending the second monitoring result to the monitoring and early warning center; and the monitoring and early warning center is used for carrying out land subsidence analysis on the to-be-monitored area according to the first monitoring result and the second monitoring result, and carrying out early warning according to an analysis result. According to the invention, a three-dimensional ground deformation monitoring system based on point-surface combination can be formed, the application limitation of a single monitoring technology is broken through, and the temporal-spatial resolution of a three-dimensional deformation monitoring result is greatly improved.

The invention discloses a lead screw driving quadrilateral movement mechanism of an automobile glass lifter. The lead screw driving quadrilateral movement mechanism is composed of a driving mechanism,a transmission mechanism and a movement mechanism body; the transmission mechanism comprises a lead screw, a perpendicular guide rail and a transmission nut; and the movement mechanism body comprisesa quadrilateral telescopic net rack set, a sliding block and a horizontal guide rail. According to the mechanism, a traditional worm and gear speed reducer assembly is replaced with a running mode ofthe lead screw and the nut, rotation is changed into linear motion, power is transmitted to a quadrilateral net structure, the power is evenly dispersed, running is stable, the service life of the mechanism is prolonged, the part cost is reduced, and the production and manufacturing technological process of products is simplified. By means of the design, the operation efficiency and stability ofthe glass lifter are greatly improved, and the effects that the manufacturing cost is reduced by about 30%, the weight is reduced by about 20%, the transmission efficiency is improved by about 15%, and the service life is prolonged by about 30% are achieved. The mechanism is simple in manufacturing process and wider in product application range.

The invention provides a distributed hydrology model multi-time flooding parameter calibration method based on DSS database reading and writing, and belongs to the technical field of hydrology model parameter calibration. The distributed hydrology model multi-time flooding parameter calibration method comprises the steps of 1, building a multi-target genetic algorithm eNSGA-II frame to be used forparameter multi-target optimization and calibration of an HEC-HMS model; 2, based on a parameter optimizing frame, utilizing a JAVA language to write individuals in a parameter species into a basin file to input model parameters, after the model is run, extracting a simulation result from a DSS database to be fed back to the frame to calculate the parameter individual adaptability to generate a new parameter species, so that coupling of the model and the parameter optimizing frame is achieved, and the whole parameter automatic calibration process is completed; 3, selecting an appropriate parameter input model in a Pareto solution set according to standards like whether parameter physical meaning conforms to drainage basin properties and evaluating precision of the simulation result or not. The application limit of the model is broken through, the calibration time and manpower are greatly saved, and the model is easily applied and popularized.

The invention relates to a single-plunger double-displacement reciprocating rotation hydraulic drive. The single-plunger double-displacement reciprocating rotation hydraulic drive is provided with an input shaft mounted in a front end cover, and a pump sleeve on the end surface; the pump sleeve is provided with an oil sucking port and two oil discharge ports; one end of the input shaft is connected with a motor, and the other end of the input shaft is connected with a pump element through a float coupling; the pump sleeve and the pump element are connected through matching a semicircular groove in the cylinder surface of the pump element with a steel ball in the spherical surface of the pump sleeve, so that the pump element performs an axial reciprocating motion along the groove in the cylinder surface of the pump element during rotating; blind holes and oil grooves are respectively formed in the centers of two ends of the pump element, wherein the blind hole at one end and the input shaft form a left end closed oil cavity of the pump, and the blind hole at the other end, the pump sleeve and a pump body form a right end closed oil cavity of the pump; the pump element rotates; the oil grooves of the pump element are alternately switched and communicate with the oil sucking port and the oil discharge ports of the pump sleeve; meanwhile, the sizes of the left and right two closed oil cavities are alternately changed along with left-right axial reciprocating motion of the pump element; the oil suction and discharge are realized; and the double-displacement output is formed. A working medium is such fluids as hydraulic oil or a water medium.

The present application provides a communication method, apparatus, and storage medium. The method includes: in response to received presentation information of a target application associated with a first screen device, determining a port identifier of a second screen device associated with the target application; based on Pre-built correspondence, query the device address corresponding to the port identifier; based on the pre-established long connection between the first screen device and the second screen device, to the second screen device corresponding to the device address. The presentation information is sent. The application can realize the communication between the first screen device and the second screen device, break through the application limitations of the communication scheme, and avoid the situation that the system broadcast message cannot be received due to the disconnection of the second screen device and other reasons. , the communication quality between the first screen device and the second screen device can be improved to a certain extent.