67results about How to "Reduce transfer data" patented technology

A system and method for efficiently correcting block errors in packet-based digital communications are provided whereby the ratio of redundant symbols / message symbols over the length of a data packet decreases in order to more efficiently use available bandwidth. The reduction of this ratio, and subsequently the change in a corresponding framing schedule, may be determined through negotiations between the transmitting device and the receiving devices. Each receiving device calculates a redundancy requirement based on signal-to-noise ratio samples. This requirement is returned to the transmitting device in the form of a schedule request. The transmitting device determines if a new framing schedule is needed based on the schedule request, and communicates this new framing schedule to the receiving device. Once the receiving device acknowledges receipt of the new schedule, the transmitting device switches to the new framing schedule for future data packet transmissions.

A receiving processing unit receives identical SD pictures transmitted a plurality of number of times, and performs addition for weighting an SD picture stored in a storage and the received SD pictures. The receiving processing unit stores the obtained values as a new SD picture in the storage. A picture-quality determining unit determines the picture quality of the new SD picture stored in the storage, and based on the determined picture quality, a request-signal transmitting unit requests class codes representing classes obtained by classifying the pixels of an HD picture in which the quality of an SD picture is increased. A receiving-control unit receives class codes which are transmitted in response to the request, and based on the SD picture and the class codes, an adaptive processing unit calculates predicted values of an HD picture corresponding to the SD picture.

The invention provides a method for obtaining contact person data in instant messenger tool. An instant messaging client saves the data and a version number of a contact person into a local database, and synchronizes with an instant messaging server through the version number; the instant messaging client obtains the version number of the contact person from the instant messaging server when the user logs on; if the version number is consistent, the local data is used, otherwise the contact person is obtained from the instant messaging server. The client does not need to download the data of contact persons in most cases, which greatly reduces the data needed during the logging on, thereby improving the speed of the logging on, saving network resources and decreasing the pressure to the server.

The invention discloses an intelligent aerial photographing system. The intelligent aerial photographing system is characterized by comprising an aerial photographing image collecting device and an aerial photographing image processing device; the aerial photographing image collecting device comprises an aerial photographing aircraft and a camera device; the aerial photographing processing device comprises a primary processing device on the aircraft and an advanced processing device on the ground; an unmanned aerial vehicle is adopted as the aerial photographing aircraft and comprises an air flying subsystem and a ground control subsystem; the camera device comprises a high-definition camera installed on the lower portion of an unmanned aerial vehicle body. The invention further discloses a method for carrying out primary processing on images with the primary processing device and a method for carrying out advanced processing on images with the advanced processing device. The aerial photographing system comprises the unmanned aerial vehicle which is capable of achieving automatic flying continuation and automatic control; meanwhile, high-definition images are automatically collected and processed multiple times, and complete and clear images can be obtained.

When a first channel processor from among a plurality of channel processors receives an I / O request from a host system, a second channel processor, which is to execute a part of the processing to respond to the I / O request, is selected from among the channel processors based on the LM directories of the respective channel processors. The selected second channel processor checks whether there is a cache hit. If there is a cache hit, it transfers the data from the cache memory to the buffer memory. The first channel processor then processes the I / O request using the data transferred to the buffer memory.

The invention relates to a method for realizing positioning based on a Beidou short message transmission differential signal. The method is provided in order to improve the applicability of satellite differential positioning, and is used to perform differential positioning in an area with neither network base station nor mobile communication base station. The method comprises the following steps: a reference station terminal gets a differential correction number according to a received satellite signal and the coordinate of a reference station, and stores the differential correction number in an internal memory of the reference station terminal; a moving station terminal generates a differential data request including differential start time and differential frequency, and sends the differential data request to the reference station terminal; the reference station terminal sends corresponding differential data to a reference station coding module after receiving the differential data request sent by the moving station terminal; the reference station terminal sends a single piece of differential data information through a Beidou short message, and multiple cards send differential data information in turn to meet the requirement of the moving station terminal for positioning frequency; and the moving station terminal receives differential data of multiple epochs, uses the data to fit a pseudo-range differential correction number through Chebyshev polynomial interpolation, and uses a correction number obtained by extrapolation to perform differential positioning.

The invention discloses a fast information interactive system and an interactive method thereof; and the system comprises an information transmitting terminal and an information receiving terminal. The information transmitting terminal comprises a touch screen, an input trace collecting and processing unit and an information transmitting unit; the input trace collecting and processing unit collects and processes the information input trace input on the touch screen; and the information transmitting unit transmits the collected information input trace to the information receiving terminal. The information receiving terminal comprises an information receiving unit and a display unit; and the information receiving unit receives the information input trace transmitted by the information transmitting unit and transfers to the display unit for displaying. In the invention, the trace of the input content is directly collected, and is transmitted to an information receiver after sampling, encoding and compressing; and the receiver displays the content on the screen through reverse decompression, decoding and trace construction. The identification of the information input by the user is not required through a computer in the whole process; therefore, the complex identification process and selection process are eliminated, and the man-machine interaction speed in the information interaction is improved for multiple folds.

The invention discloses a nonlinear truck trailer system fuzzy control method based on an event trigger mechanism. The method comprises the steps that a dynamic mathematical model of a truck trailer system is established; 2 an event trigger condition of the truck trailer system is set based on the event trigger mechanism, and a fuzzy controller of the truck trailer system is constructed; and 3 a fuzzy control law u (t) transmits a control signal command to an actuator of the system through an event triggering device to realize control. According to the nonlinear truck trailer system fuzzy control method based on the event trigger mechanism, a relatively ideal dynamic characteristic is acquired; the method is robust to the change of the parameters of the system and external disturbance signals, so that the system is stable; in addition, due to the introduction of an event-triggered communication mechanism, the time-varying delay characteristic of the truck trailer system is effectivelysuppressed, and transmission data in a network are reduced; and the burden of the bandwidth occupancy rate of the network is reduced.

The invention belongs to the technical field of English distance education, and discloses an English distance education and test system and method. The system comprises an image collection module, a voice collection module, a data collection module, a data processing module, an account management module, a wireless communication module, a display module, a radio base station, a remote server, andan intelligent mobile terminal. The image collection module and the voice collection module are connected with the data collection module through circuit lines, the data collection module is connectedwith the data processing module through the circuit line, and the data processing module is connected with the account management module and the display module through circuit lines. Sentence pronunciation speed, accent, content, rhythm and intonation indicators are fully considered due to a Chinese-English translation module and an English pronunciation detection module, and the system has highdetection accuracy and high reliability, and makes distance network English learning data much more safer due to the account management module.

The invention relates to a fire boundary vector information real-time extraction and visualization method and system. With the advantage that an unmanned aerial vehicle is not affected by harsh conditions in the wild being made full utilization of, the unmanned aerial vehicle is equipped with a GPS module, a trajectory control module and a data preprocessing module and the like, and operating personnel can control the unmanned aerial vehicle to fly right over the boundary of a fire scene and record the flight path at regular time under the guidance of ground platform real-time videos, wherein the recorded flight path of the unmanned aerial vehicle can represent the boundary of the fire scene; after re-sampling pretreatment of the trajectory, the forest fire boundary data can be transmitted to a remote server through a communication module; a server program analyzes a message and writes the whole boundary of the fire scene into a database; for large-range forest fire, the invention also considers a multi-UAV collaborative boundary obtaining method; and finally, decision-aid visualized software can read data from the database and updates the data regularly, and decision personnel can know fire scene situations in a two-dimensional or three-dimensional virtual forest environment in real time.

The invention discloses a camera-based door control method, a camera-based door control device and a camera-based door control system. The method comprises the following steps: acquiring video data through a camera; detecting the video data, and judging whether a robot appears or not; when the robot appears, transmitting a door opening command to a door to control the door to open. According to the camera-based door control method, the camera-based door control device and the camera-based door control system, the camera is introduced into an internal network of a control door system, and the robot and non-robot in the video data are effectively distinguished through an algorithm, so that the control device only transmits a door opening signal to the door when the robot appears, and the door cannot be opened when the non-robot appears in front of the door; the video data are not required to be transmitted, and only a door opening and closing command is required to be transmitted, so that the door opening and closing timeliness is ensured; when the method, the device and the system are applied to a charging room, a new camera is not required to be installed, original equipment is notdamaged, and the cost is reduced. Preferably, an optimal target detection model can also be acquired through SSD model training, the intention of the robot is detected by using the model, and the door is controlled more reasonably.

Provided are a method and a system of video transmission. The method includes the steps that frame pictures of a transmission video are acquired according to an original video; circumscribed polygons of displacement of moving objects and position information of the moving objects in the frame pictures are calculated; according to the position information, background pictures of the circumscribed polygons are collected, and moving objects videos of all frame pictures inside the circumscribed polygons are collected; and the video transmission is conducted according to the position information, the background pictures and the moving object videos. According to the method and the system of the video transmission, video data of the minimum region of the displacement of the moving objects of the transmission video are transmitted, images, except for the minimum region, only need to be transmitted for one time, transmission of the redundant data size of the background part is reduced, transmission data are effectively reduced, and speed and efficiency of the video transmission are improved.

A method and circuit for reducing SATA (Serial Advanced Technology Attachment) transmission data errors by adjusting the period of sending two consecutive ALIGN Primitives. The method reads a counting value of an 8b / 10b coding error counter at a predetermined period and adjusts the period of sending two consecutive ALIGN Primitives according to the counting value. Because the system dynamically adjusts the period of sending two consecutive ALIGN Primitives according to the channel condition, the SATA transmission data errors can be reduced.

The invention discloses a railway shunting top-delivery operation smart control system. The railway shunting top-delivery operation smart control system comprises information perception and processingequipment, vehicle-loaded monitoring equipment, a ground server, a point-to-point high-speed wireless transmission system and an Internet communication system, wherein the information perception andprocessing equipment is mounted on an end wall of a vehicle at the forefront pushed by a shunting top-delivery operation train set, and is used for acquiring front-end operation information of top-delivery operation, and transmitting the acquired information back to the vehicle-loaded monitoring equipment in a cab through the high-speed point-to-point wireless data transmission system; a driver controls the shunting top-delivery operation according to the transmitted front-end operation information, and transmits the front-end operation information and driver operation information to the ground server through the Internet communication system; ground control personnel performs real-time monitoring on the shunting top-delivery operation to realize railway shunting top-delivery operation smart control. By adopting the railway shunting top-delivery operation smart control system, the problem of poor front lookout of a shunting driver in the top-delivery operation is solved, and the safetylevel and operation efficiency of the shunting top-delivery operation can be improved effectively.

The invention relates to a virtual reality device and control device and method thereof. The control method includes performing pairing with the virtual reality device; identifying user operation and generating operation data; processing operation data and generating command data and calling a Bluetooth module to send instruction data to the virtual reality device. According to the invention, the virtual reality device is controlled through rich control functions of a prior smart mobile terminal. Problems of single function, incompatibility and carrying inconvenience of a prior Bluetooth handle are solved. Cost of the virtual reality device is reduced and interaction experience is improved.

The invention relates to the technical field of face recognition, in particular to a GPU-based face recognition system. The GPU-based face recognition system comprises a GPU mainboard and a CPU mainboard. The CPU main board is connected with the face collector through a serial peripheral interface SPI. a memory is inserted into the CPU main board; the storage creats a face library, the face library creats an AgentManager service and establishs a connection with the GPU main board, the GPU main board and the CPU main board are simultaneously connected with a timer in a triggering manner, and the timer registers information with the resource manager and is synchronously connected with a background database system. The system is high in recognition speed, high in accuracy and suitable for being applied to large-scale big data.

The invention discloses a remote live-action augmented reality method based on VR head-mounted display equipment, and the method comprises the following steps: S100, collecting a remote live-action video in real time at a far end through employing camera equipment, and obtaining the remote live-action video of a far-end scene, performing depth calculation on the obtained remote live-action video to obtain depth information of the remote live-action video; S200, constructing a scene structure according to the depth information of the remote live-action video obtained in the step S100, and fusing a virtual object with the remote live-action video to obtain image data after virtual-real fusion; S300, intercepting the image data after virtual-real fusion, and sending the image data after virtual-real fusion to a client in real time through a network. The method has the advantage of overcoming the defects that the existing VR live broadcast software can only passively watch the pushed live broadcast picture, cannot superpose a virtual model, is low in picture quality, is not strong in immersion, is limited in effective transmission distance and the like.

Disclosed is a railway shunting top delivery operation intelligent control method. The end wall of the forefront car of a shunting top delivery operation car row is provided with a detachable information sensing and processing device, which collects and transmits the front end operation information during top delivery operation back to a driver cab in a high-speed point-to-point wireless data transmission mode, and a driver can in real time control the shunting top delivery operation according to the transmitted front end operation information to achieve intelligent operation control over theshunting top delivery operation. The railway shunting top delivery operation intelligent control method solves the critical problem of accidents caused by poor watching of road conditions ahead duringthe railway shunting top delivery operation, and through the point-to-point high-speed wireless transmission technology, solves the technical problem of real-time back transmission of front end monitored images of the railway shunting top delivery operation, eases the business critical point of poor watching ahead of top delivery operation by the shunting driver and effectively improves the safety level and the operation efficiency of the shunting top delivery operation.

The invention discloses an information forwarding method based on an International Electrotechnical Commission (IEC) 61850data set. The method comprises steps of (1) constructing a scheduling data set forwarding information module for every scheduling system; (2) loading the scheduling data set forwarding information modules by using a scheduling system; (3) loading the scheduling data set forwarding information modules of the scheduling system which is communicated with a substation by using the substation, and constructing the configuration of the scheduling data set forwarding information module to a forwarding information data module subset; (4) enabling the substation to use the sane data set to generate a report example, sending a non-buffering report directing and executing the step (5) by using a buffering report, and (5), acquiring the corresponding relation between the scheduling system and the report example, modifying the data set associated with the report example and deleting data which cannot meet a rule of a buffering region. The report information can be filtered for different clients, the report service of different forwarding information modules is provided, and the problem of forwarding information filter of the substation and the scheduling of the IEC 61850 communication is solved.

The invention provides a substation intelligent inspection system. The system comprises smart glasses, a miniature microphone, a mobile terminal, a cloud server, an electronic lock and a controller. The controller is installed in a control room of a substation and is connected with the cloud server through a communication network or a power private network, the mobile terminal is connected with the cloud server through the mobile communication network, the electronic lock is installed on the door of the substation, the electronic lock is connected with the controller, and the smart glasses andthe miniature microphone are in wireless connection with the mobile terminal, the smart glasses are configured to shoot images and videos of devices to be inspected in the substation and send the captured images or videos to the mobile terminal, and the miniature microphone is configured to collect the field sound and send the collected audio to the mobile terminal. The substation intelligent inspection system can monitor the working condition of the substation in the whole process so as to improve the efficiency and the accuracy of the substation inspection.

The invention relates to a quantum communication service station digital signcryption method and system based on an asymmetric key pool. A quantum communication service station is provided with a service station key card; each participant is provided with a client key card; the method comprises the following steps: at a signcryption party, extracting a parameter Kia1 from an asymmetric public keypool of a client by utilizing a random number, extracting a parameter Kia1 from an asymmetric private key pool of the client, extracting a parameter Kia2 from an asymmetric key pool of a service station, and performing calculating by utilizing the parameter Kia2 to obtain a first intermediate parameter and a second intermediate parameter; encrypting the first original text by using the first intermediate parameter to obtain a first ciphertext; using a Hash function to act on the first original text and the second intermediate parameter to obtain a parameter ra; performing calculating by usingthe parameter ra and the parameter kia1 to obtain a parameter sa; calculating the parameter Kia2 and the parameter Kia1, using a Hash function to act on the calculation result and the parameter ra toobtain a parameter rka, and using the parameter rka to encrypt the parameter sa to obtain a parameter srka; and sending the first ciphertext, the parameter ra and the parameter srka as signatures to apassword verification party for signature verification.

A knit goods simulation device converts design data of knit goods to myoneme data that express loops by myonemes. The knit goods simulation device expresses the loop by polygonal columns, divides side surfaces of the polygonal column into polygons, and stores the polygon apical coordinates in a polygon memory. The knit goods simulation device extracts loops in a simulation image displayed on a monitor, processes them at a graphic CPU, and limits the processing scope. Further, the knit goods simulation device stores a part of the apical data in a graphic memory so as to make its transfer from the polygon memory unnecessary. The knit goods simulation device can process a three-dimensional image at high speed.

The invention relates to a file management consistency maintenance method in a real-time cloud file-system. A load balancing algorithm is employed for processing mass data efficiently in a cloud environment. When the number of cooperative people is very low, data can be rapidly processed by a server, and the data is directly processed through the server. When the number of cooperative people is high and reaches a set critical value, data is distributed. A plurality of servers work at the same. The servers process the data rapidly and feed back partial processing results to the server for finalprocessing. A COT algorithm is improved to adapt to new centralized architecture in the cloud environment. Unnecessary data transmission is reduced. A relatively high timeliness demand is achieved byreducing query and conversion time. A file model under cloud storage is improved into a cooperative cloud file management system. For three operations: create, delete and rename of a file node in thefile model, the improved COT algorithm is applied to the file management in the cooperative file-system.

The invention relates to a distributed network asset surveying and mapping method and device, computer equipment and a storage medium, and the method comprises the steps that a distributed network asset surveying and mapping node responds to the received network asset surveying and mapping request information, and obtains the current data transmission quantity of seed equipment corresponding to the surveying and mapping node in real time, whether the seed equipment is in an idle state or not is judged according to the data transmission quantity; when it is judged that the seed equipment is inthe idle state, a scanning instruction is sent to electronic equipment directly connected with the seed equipment so as to scan the electronic equipment to obtain a scanning result of the electronic equipment; and the distributed network asset surveying and mapping node compares the current scanning result of the electronic equipment with a previous scanning result, generates a local surveying andmapping result according to a comparison result, and sends the local surveying and mapping result to a network asset surveying and mapping server.

The invention provides a transmission channel number conversion system and a conversion transfer method of a low-voltage differential signal. The system comprises a control module, an image source device, a channel number conversion transfer module and a channel number receiving conversion module. The method comprises that: synchronizing an output channel number of an image source device with a receiving channel number of a channel number conversion transfer module to carry out data transmission; carrying out data transmission under different conditions according to the number mutual relation between the receiving channel number and the output channel number of the channel number conversion transfer module (the number of the two channels is not equal); synchronizing the output channel number of the channel number conversion transfer module and a receiving channel number of a channel number receiving conversion module to carry out data transmission, and carrying out data transmission under different conditions according to the number mutual relation between the receiving channel number and an output channel number of the channel number receiving conversion module (the number of the two channels is not equal).