30results about How to "Guaranteed delivery rate" patented technology

The invention discloses a resource scheduling method which is used for solving the technical problem that in the prior art, mutual interference occurs when an LTE system and a WLAN system multiplex one frequency band. The resource scheduling method comprises the steps that an LTE base station detects the state of a channel on an unauthorized frequency band; if the LTE base station confirms that the channel on the unauthorized frequency band is in an idle state according to the detection result, a public reference signal is sent on the unauthorized frequency band, and the public reference signal is used for indicating the fact that the channel in the idle state on the unauthorized frequency band is prohibited from being used to perform data transmission to WLAN system user equipment; the LTE base station schedules the channel in the idle state on the unauthorized frequency band to LTE system user equipment for using. The invention further discloses a corresponding base band processor.

The invention claims an interest packet forwarding method based on data attributes in a vehicle-mounted named data networking. The interest packet forwarding method comprises the steps that: a vehicle node monitors an interest packet sent by a neighbor vehicle, and extracts a position L, a driving vehicle speed V1 and a driving direction D1 of a previous hop vehicle from the interest packet; then the vehicle node calculates waiting time according to a Twait formula, and enters a monitoring state; and the vehicle node forwards the interest packet when the forwarding of the interest packet by other vehicles is not monitored at the end of the wait time, or cancels the forwarding if the forwarding of the interest packet by other vehicles is monitored before the end of the wait time. According to the interest packet forwarding method, the Twait calculation results is changed with the combination of data attribute coefficients, thus the vehicle suitable for assisting in forwarding data with the attributes has the minimal wait time, the forwarding vehicle selection is completed, and the pass back success rate and average transmission delay of the data packet are improved while ensuring the distribution rate of the interest packet.

The invention provides a video data transmission method, device and system. The method comprises the following steps: determining a frame type of a current to-be-transmitted video frame by a sending end, and sending the video frame to a receiving end; when the frame type of the video frame is determined as an I frame, receiving a feedback message of receiving condition of the I frame returned by the receiving end; performing corresponding operation processing on the I frame according to the feedback message until the receiving end returns a feedback message indicating the reception of the I frame, sending the next frame of the video frame to the receiving end, wherein the operation processing comprises: deleting the I frame from an I frame transcript chain table, or sending the I frame to the receiving end again. In the video data transmission method, device and system provided by the embodiment of the invention, on the basis of the non-connection transmission protocol, a reliable data transmission mechanism is adopted for the I frame so as to ensure the regularity and the integrity of the key frame of the I frame on the premise of guaranteeing the delivery rate of the video data transmission, and relieve the phenomena of smearing and blurred screen in a video playing process in the case of instability of a current network.

The invention discloses a routing method based on a three-dimensional scene in a vehicle self-organizing network. The routing method mainly solves the problem that performance of an exiting routing method of the vehicle self-organizing network in the three-dimensional scene is reduced. The routing method includes the steps of firstly, selecting destination crossing determining methods through grouped nodes to be sent according to the position conditions and determining the destination crossings; secondly, forwarding grouped nodes to be forwarded with the destination crossings serving as destinations, and determining the forwarded nodes according to the virtual distance obtained through calculation; thirdly, judging whether the forwarded nodes are destination nodes or not, if yes, terminating the routing process, and if not, judging whether the forwarded nodes are located at the destination crossings or not, selecting the destination crossings again if the forwarded nodes are located at the destination crossings, and grouping and forwarding the nodes if the forwarded nodes are not located at the destination crossings. By means of the method, the number of jumping times of a router and the communication time delay are reduced, the overall performance of the router is improved, and the method can be used for data transmission in the three-dimensional scene in the VANET.

The invention relates to a smart school bag system and a management method. The system comprises a smart school bag, a server and an interactive control module. The functions realized by the system include a remote call, a voice message, a GPS electronic map, an electronic fence alarm, an emergency alarm, a school bag overweight prompt and the like. In addition, combined with the use of the system, a smart school bag management method of a "smart curriculum" is realized. Compared with the prior art, the invention does not implement a voice call based on a method of making a call and does not transmit a GPS message by means of a short message, but establishes an Internet-based real-time communication system, by which all information including audio/video is digitized and transmitted, so asto freely define its working methods, expand its functions, and solves the communication problems and safety problems of children on the way to school and at school are solved, and at the meantime, the invention provides the smart school bag management method that facilitates children's learning and life.

The invention provides an underwater acoustic sensor network transmission method with high data packet delivery rate and energy effectiveness, which comprises a neighbor beacon interaction mechanism for helping a sensor node to obtain the number of neighbors for a routing protocol; an opportunistic routing mechanism plans an optimal data packet transmission path based on the number of neighbors; aconflict-tolerant MAC protocol is provided, corresponding priorities and transmitting powers are arranged for different types of packets, so that conflicts with important packets are reduced. According to the method, extremely low control overhead is used, the delivery rate is ensured under the underwater acoustic channel with a high interruption rate, and meanwhile, data packets are prevented from being repeatedly transmitted or entering a communication null area; the coverage area of the INFO is increased by increasing the power of the INFO; the problem of hidden terminals faced by opportunistic routing based on a receiver is effectively solved, the transmitting priority of INFO is set to be higher than that of data packets on an MAC layer, conflicts of the MAC layer are reduced, the energy utilization rate of sensor nodes is effectively increased while the delivery rate of the data packets is guaranteed, and therefore the service life of a network can be effectively prolonged.

The invention relates to the technical field of PCB processing. The invention discloses a processing method for back-to-back design of a PCB. The method comprises an upper core plate and a plurality of middle core plates positioned at the bottom end of the upper core plate, a lower-layer core plate is arranged at the bottom end of the middle-layer core plate; the sizes of the upper core plate, themiddle core plate and the lower core plate are the same; copper layers are electroplated on the front surfaces and the back surfaces of the upper-layer core plate, the middle-layer core plate and thelower-layer core plate, and semi-cured prepreg materials are arranged between the upper-layer core plate and the middle-layer core plate, between the middle-layer core plates and between the middle-layer core plates and the lower-layer core plate. According to the invention, before pressing combination, one core plate is normally stacked and the other core plate is combined back to back after being rotated by 180 degrees and then is pressed, so that the use amount of films can be greatly reduced, the utilization rate of the screen plate can be reduced, the production cost is reduced, the processing time is saved, the production efficiency is improved, the delivery rate is ensured, the quality is ensured, and the market requirements are met.

The invention discloses a steam ironing table. The steam ironing table comprises a body table top, a clothes hanging device and a steam generation device. The steam generation device is connected with a plurality of steam conveying pipelines. The steam conveying pipelines are located below the body table top, a steam conveying structure which is communicated to the steam conveying pipelines is formed in the body table top, and the clothes hanging device is hung on the top of the body table top and can be rotated by 360 degrees. The steam ironing table has the advantages that clothes are placed on the clothes hanging device and can be automatically shaped under the effect of gravity; the clothes hanging device itself can be rotated by 360 degrees through a round ball without being manually turned over, and the steam ironing table is safe and efficient; the steam conveying pipelines are formed by assembling multiple sections of round pipes, wherein the diameters of the round pipes gradually reduce from bottom to top, so that the steam conveying rate is guaranteed; starlike through holes are formed, good diffusivity is guaranteed when steam is output, and therefore the good ironing effect is guaranteed.

The invention belongs to the technical field of take-out order delivery, and discloses a college park-oriented catering order intelligent delivery method, storage medium and computer, and the delivery method comprises the following steps: it is judged whether there are riders capable of delivering orders, if there are no riders capable of delivering orders, quitting of the process is carried out, and waiting for the next time slice is carried out; if there is a rider capable of dispatching the order, entering order dispatching algorithm initialization; an order sending algorithm is initialized, order and rider data are read, a meal taking area and a meal delivery area are divided based on a K-means clustering algorithm, and the order receiving priority of a rider is evaluated; a meal taking time prediction model based on a neural network is constructed, and prediction of order delivery time is realized; based on operation optimization, order distribution of campus take-out delivery is realized; and a meal delivery path of the rider is planned based on a genetic algorithm, and the shortest meal delivery path of the rider is obtained According to the invention, the delivery efficiency and the delivery experience are improved, and the delivery cost is reduced; and the workload and professional skill requirements of dispatchers are reduced, so that the labor cost is reduced.

The invention relates to an automatic soda ash solution perfusing system and a soda ash solution perfusing method thereof for steamed sponge cakes. The automatic soda ash solution perfusing system comprises a soda ash solution perfusing device, an auxiliary device for assisting the soda ash solution perfusing device to produce the steamed sponge cakes, a transmitting device located between the soda ash solution perfusing device and the auxiliary device and a control unit for controlling the soda ash solution perfusing device, the auxiliary device and the transmitting device, wherein the auxiliary device comprises a plurality of bearing assemblies for loading raw materials of the steamed sponge cakes, and one or more first transporting assemblies which are located on one side of the soda ash solution perfusing device and are used for transporting the bearing assemblies to enter or move out of the soda ash solution perfusing device; the soda ash solution perfusing device comprises a lifting assembly for adjusting the soda ash solution perfusing height and a second transporting assembly for transmitting the bearing assemblies; and the transmitting device comprises a machine frame located between the soda ash solution perfusing device and the auxiliary device, a waste material gathering cavity located in the machine frame, a third transporting assembly and a fourth transporting assembly, wherein the third transporting assembly and the fourth transporting assembly are distributed in the waste material gathering cavity according to the transporting sequence and are used for transporting the bearing assemblies on the first transporting assemblies to the second transporting assembly. The automatic soda ash solution perfusing system for steamed sponge cakes can be full-automaticsoda ash solution perfusing equipment for steamed sponge cakes, so that the links of realizing soda ash solution perfusing height, moisturizing the steamed sponge cakes, transferring the steamed sponge cakes and the like can be fully-automatically realized, the quality of the produced steamed sponge cakes is high, and the ex-warehouse qualified rate is high.

The invention relates to a silver sheet feeding device for a silver spot riveting machine. The silver sheet feeding device comprises a silver sheet feeding frame, a silver sheet feeding cutter and a silver sheet feeding mechanism. The silver sheet feeding cutter is fixedly arranged on the silver sheet feeding frame. The silver sheet feeding mechanism is arranged on the silver sheet feeding cutter.The silver sheet feeding mechanism comprises a silver sheet conveying bottom plate and a silver sheet hanging plate arranged on the silver sheet conveying bottom plate. A silver sheet protection plate is arranged in a lateral gap of the silver sheet hanging plate. Because the silver sheet protection plate is arranged in the lateral gap of the silver sheet hanging plate and silver sheets are arranged in the gap between the silver sheet hanging plate and the silver sheet protection plate, the silver sheet conveying bottom plate is driven by the silver sheet feeding cutter to move the silver sheets, the stability is high, the probability of silver sheet dropping can be effectively reduced in the conveying process, the percentage of conveyed silver sheets and the machining efficiency of the silver spot pivoting machine can be guaranteed, and the silver spot riveting machine can be popularized and utilized in the market.

The invention discloses aninformation sending method and device based on distances, a computer device and a storage medium, and the method comprises the steps: obtaining a target mobile phone number,and obtaining the feature information of a user of the target mobile phone number; mapping the target mobile phone number into a specified vector in a high-dimensional virtual space; screening a plurality of temporary vectors from the plurality of standard high-dimensional vectors; calculating to obtain a plurality of first distances, wherein the first distances are distances between the specifiedvector and the temporary vector; and if the plurality of first distances are not smaller than a preset distance threshold, acquiring a specified information sending strategy corresponding to the first distance with the maximum numerical value according to a corresponding relation of a first distance-temporary vector-information sending strategy, and sending information to the target mobile phonenumber according to the specified information sending strategy. Therefore, targeted information sending is realized, and the information sending cost is reduced on the premise of ensuring the deliveryrate.

The invention discloses a power grid service transmission method and system. The method comprises the following steps: determining characteristic values of various types of services in a power grid system; performing primary division on the service according to the characteristic value to obtain a plurality of service groups; sorting the plurality of service groups; counting the weight factors of the sorted service groups and determining a priority threshold value; adjusting the priority order of the service group according to the priority threshold; obtaining the value of services in each service group after the priority sequence is adjusted; packaging services in each service group to a channel according to the comprehensive value and the network condition, wherein the sum of bandwidths packaged to the channel is smaller than a channel bandwidth limit value; judging whether the residual capacity in the communication pipeline is smaller than the minimum bandwidth value of the residual service or not; and if yes, expanding the communication pipeline. According to the method, the priority and the fairness are considered, the channel resource waste can be remarkably reduced while all services are ensured to be transmitted, and the channel utilization rate is improved.

The invention provides a wireless transmission control method, system and device of a three-dimensional scanner and a medium. The current information transmission condition is detected by analyzing the information transmission of the three-dimensional scanner and a work station within a period of time, and when it is detected that the information transmission is unstable or the transmission speed is insufficient, a sending strategy is dynamically adjusted in real time according to information transmission conditions, priorities of control information, position information, image information and image summary information are set, important information is preferentially transmitted according to the priorities, quality evaluation standards are dynamically adjusted according to the image summary information, and high-quality image frames in the image information are transmitted. According to the invention, the transmission data volume is actively controlled, and the delay is reduced, so that a smoother scanning effect under the current network condition is realized.