415results about How to "Resolve delay" patented technology

The invention provides a sending and receiving method and apparatus of control signaling, and an information determining method and apparatus. The method comprises the following steps: determining second information according to first information, wherein the second information comprises at least one of: the number of bits used in first control signaling to notify a first transmission parameter, an index value referred by the first transmission parameter in the first control signaling, a corresponding mapping table between the values of the first transmission parameter, the type of the first transmission parameter notified in a predetermined indication domain in the first control signaling, and location information of the bit used for notifying the first transmission parameter in the firstcontrol signaling; the first information comprises a transmission time interval between the first control signaling and a first signal and a relationship between predetermined thresholds K, and N andK are non-negative integers; and sending the first control signaling. Therefore, the problem of low resource utilization rate because the bit domains of the notification beams in the physical layer dynamic control signaling are not fully utilized in related art is solved.

The invention discloses a remote control automatic driving method under a 5G environment. The method comprises steps of according to delay conditions between nodes of the 5G network, setting multipleremote driving cloud centers; collecting data from vehicles and sensing device on the road sides; through remote control, achieving automatic driving of automobiles; by using characteristics of automatic driving regionalization, road localization and personalization and combining the 5G network slicing ability, transmitting vehicle acquisition data to cloud end through the high bandwidth; by use of massive calculation ability of the cloud centers, achieving decisions; and transmitting results back to vehicle ends through a high-reliability low-time delay network. According to the invention, the 5G network can be effectively used; remote driving ability is formed on the cloud end; network delay problems are solved; interconnection and communication between vehicles are improved; and quite superior automatic driving of vehicles is achieved.

The invention provides a mass small tile file storage management method based on hadoop. According to the method, sequencing is carried out through a Hibert curve, and then, grid tile data is subjected to serialization compression storage by a Sequence File technology of the hadoop pre se; when tile compression blocks are generated, the multithreading parallel compression of a plurality of servers is realized, tile index information is generated, and the mass file library entering storage speed is accelerated; the regular naming of block file names is managed, and efficient storage, fast reading and high-performance grid data service can be provided for mass multi-source and multi-version grid small tiles; and ITMS (Improved Tile Map Service) is designed, and the problem of delay and bandwidth occupation caused by original data transmission and real-time data processing request responding, so that the project data retrieval and transmission requirements are met.

The invention discloses an industrial laser guidance automatic guided vehicle (AGV) double-closed-loop control system and a control method thereof. The system consists of a detection module and a control module and is characterized in that: the detection module consists of an encoder serving as a motor position sensor and a laser scanner serving as an AGV position sensor; the control module consists of a servo driver and an industrial personal computer and is a double-position closed loop control module consisting of an inner position ring and an outer position ring; the inner position ring is a motor intersection angle position ring; the outer position ring is used for reading an AGV position signal by using the laser scanner; the path tracking error of the current position of an AGV is calculated by the AGV position signal fed back from the outer position ring; and the path tracking error is used as the input quantity of the control system. By the system and the method, the independent running function of the industrial laser guidance AGV can be well realized, and the rapidity and the stability of the path tracking of the AGV can be ensured.

The invention relates to multi-virtual reality helmet anti - vertigo systems and methods based on an acceleration sensor, belongs to the field of virtual reality interactive technologies. The system includes four line acceleration sensors, helmet position tracking device and computer. The working steps of the system are:through a acceleration sensor on the helmet ,gets the angular acceleration rotating around head and the line acceleration of movement before and after; 6-DOF position information of head movement presented by the position tracker , is given effective forecasting of location by the computer; by placing another acceleration sensor on movement platform of the human body set, it can realize position measurement of the corresponding freedom of movement platform, and gain an effective forecasting of the relative position. With the invention of high-performance, strong practicability, low-cost features, users can effectively alleviate vertigo symptoms of disease caused by long wearing virtual reality helmet, such as simulation.

The invention relates to the field of urban rainwater treatment systems, in particular to a separate system pipe network based area fragmented rainwater abandoned flow treatment system. An area internally comprises a sewage header pipe, rainwater branch pipes and sewage branch pipes; the discharging ends of the sewage branch pipes are communicated with the sewage header pipe, the area is divided into a plurality of segments in a grid shape, and the area of each fragment is 0.2-4 square kilometers; each fragment is internally provided with a sewage branch pipe, a rainwater branch pipe and one or more abandoned flow wells; each abandoned flow well comprises a well body, each well body is provided with a water inlet pipe communicated with the discharging end of the corresponding rainwater branch pipe, a water outlet pipe communicated with natural water and an abandoned flow pipe communicated with the sewage header pipe. The separate system pipe network based area fragmented rainwater abandoned flow treatment system is simple in structure, the problem of delay in the long-distance conveying process of initial rainwater in the prior art is solved through the independent abandoned flow wells in the fragments, the treatment pressure of a sewage treatment plant is relieved, the situation that initial rainwater pollutes natural water is further avoided, and discharging treatment of rainwater is more reasonable and effective.

The invention discloses a television audio signal processing device which comprises a control module, an audio transmitting module, a detection module and an adjustment module, wherein the control module is used for controlling the audio transmitting module to be in wireless fidelity (WIFI) connection with an audio receiving module of a wireless loudspeaker box; the audio transmitting module, the detection module and the adjustment module are connected with the control module; the audio transmitting module comprises a packet transmitting buffer region and is used for converting an audio signal output by a television into an audio data packet to be transmitted to the audio receiving module of the wireless loudspeaker box through a WIFI network; the detection module is used for detecting strength of a WIFI signal in real time; the adjustment module is used for correspondingly adjusting capacity of the packet transmitting buffer region and interval time of packet transmitting according to the range of the detected signal strength. The television audio signal processing device solves the problem of delay and shake caused by television audio signal transmission through WIFI and helps to improve sound playing effect of the wireless loudspeaker box.

The invention provides a safety monitoring system for a programmable logic controller in an industrial control system and a method thereof. The system is composed of a user program simulation operation module, an operation state real-time monitoring module and an operation state safety detection module based on a real-time database. When safety detection is not performed, the user program simulation operation module can independently operate for simulation operation of the PLC, and operation state real-time monitoring module can independently operate for remote monitoring of input and output and the variable values of the PLC. When a safety detection function is started, the three modules are connected and interact via the real-time database, the monitoring variables outputted by the user program simulation operation module and the operation state real-time monitoring module are inputted to the real-time database, and the operation state safety detection module reads the corresponding variables from the real-time database for safety detection.

The invention discloses a screen projection method, a screen projection system and a storage device, and the method comprises the steps: obtaining screen projection data, the screen projection data comprising a first type of screen projection data and/or a second type of screen projection data; transmitting the screen projection data to target screen equipment, therefore, the target screen devicereceives and displays the screen projection data, wherein the application layer is provided with at least a first transmission channel and a second transmission channel, the first type of screen projection data and the second type of screen projection data of the application layer are transmitted through the first transmission channel and the second transmission channel respectively, and the low-delay user datagram transmission protocol is used for transmitting the screen projection data on the transmission layer. In this way, the screen projection method and device can reduce the lagging in the screen projection process and improve the fluency.

The invention provides a microphone signal delay compensation control method based on echo cancellation. The method comprises the following steps: after conducting short-time data analysis on a microphone signal and a loudspeaker signal, relatively accurately calculating the time difference between the two signals, and then performing expansion and alignment operations on a buffering area to realize no time delay between the two digital signal sources. The microphone signal delay compensation control method based on echo cancellation effectively solves the problem that due to time delay between the microphone signal and the loudspeaker signal in a non-real-time system such as an Android system, an acoustic echo cancellation module cannot be used normally; and on the premise of not performing any bottom-driver modification on a system platform, the problem of time delay between the microphone signal and the loudspeaker signal is simply and effectively solved, so that the echo cancellation function can complete the same technical effect on an application software layer under Android as the way that the echo cancellation function is directly added to a bottom driver.

The invention discloses a method and a system for processing a remote controller connection. The method comprises the steps of connecting a remote controller and a remotely controlled device via a Bluetooth, and after the Bluetooth pairing is successful, monitoring whether the remote controller has an operation; when the remote controller has no operation and the remotely controlled device is in a starting-up state, keeping the remote controller in a shallow dormancy mode connection all the time, namely controlling the Bluetooth of the remote controller to keep a scanning state, sending a data packet once every a first preset time, controlling and monitoring an energy of the remote controller in a Bluetooth state to be in the first energy; and when monitoring the Bluetooth connection between the remote controller and the remotely controlled device is disconnected, controlling the remote controller to start a dormancy mode, wherein the Bluetooth is closed when in the dormancy mode, the energy is controlled in the third energy, and a working mode can be awakened via any key. According to the method and the system disclosed by the invention, on the basis of the prior art, the energy mode of the remote controlled is modified, so the experience problem possibly due to a reconnection speed is solved, and the energy is guaranteed to be at a relatively low level.

The invention discloses a navigation control method of a medical capsule endoscope and solves the problem of external active control on the capsule endoscope when the permanent magnet capsule endoscope performs internal examinations. The method that a permanent magnet and an electromagnetic coil are combined to control internal stable suspension motion of the capsule endoscope is adopted. The control method comprises links including a sensor signal processing link, a feedforward control law link, a feedback control law link, a state estimator link and the like. In the sensor signal processing algorithm link, position information of the capsule endoscope is acquired from an original signal returned by a sensor; in the feedforward control law link, a theoretical output signal value at the steady state is calculated according to a theoretical model to serve as a basic output signal so as to reduce the system nonlinear effect; in the feedback control law link, closed-loop control is realized according to feedback position information to reduce system errors; the state estimator link is used for eliminating or reducing instability caused by system pure lag. With the adoption of the method, stable constraint of any position of the capsule endoscope in liquids in body cavities by an external device can be realized finally.

The invention provides a real-time data transmission method and system based on the transmission control protocol. The real-time data transmission method comprises the steps of S1 packaging a media file on demand into a plurality of data packets, enabling each data packet to contain a timestamp which records the transmission time of the data packet, and transmitting the data packets through the transmission control protocol, S2 recording the receiving time of the first data packet, and obtaining the initial time difference with the cooperation of the transmission time recorded in the timestamp in the first data packet, S3 recording the receiving time of the next data packet, obtaining the current time difference with the cooperation of the transmission time recorded in the timestamp in the received data packet, enabling the initial time difference to be subtracted from the current time difference, and obtaining a time difference value, and S4 comparing the time difference value with a preset time difference limiting value to determine whether the code stream of data transmission is adjusted or not. According to the real-time data transmission method and system based on the transmission control protocol, network self-adaptation is achieved, and the problem that frames are delayed when the transmission control protocol is used for real-time data transmission is solved.

The invention discloses a multi-dimensional power communication network flow prediction method and system; the method comprises the following steps: step 1, network flow is collected; step 2, a multi-dimensional flow prediction method is carried out; step 3, a dynamic weight updating strategy is introduced into a single exponential smoothing algorithm; the system comprises application layer equipment, an interface module, an SDN controller, an SDN coordinator, an SDN device, an OTN device and an EOPN device. The method and the system have the advantages that a cloud service technology is introduced in the adopted data measurement method; an SDN technology is introduced into a data acquisition part; the collected transverse dimension data are trained through a BP neural network algorithm; and an algorithm combined with an FARIMA algorithm and an ELman algorithm is adopted for the collected longitudinal dimension data. The precision of the prediction algorithm is improved; and the singleexponential smoothing algorithm is adopted to update the weight output by the multi-dimensional prediction algorithm, so that the fluctuation dimension of errors is reduced.

The invention discloses a monitoring video recording method and device. The monitoring video recording method comprises the steps of receiving video stream data in allusion to a monitoring object, judging whether slicing processing is required to be performed on the video stream data or not, and if so, segmenting the video stream data into video stream segments and transmitting the video stream segments to a remote client. According to the method disclosed by the embodiment of the invention, the remote client does not need to wait the end of uploading of the video stream data, and can receive the video stream data recorded when the monitoring object has a special event in the uploading process of the video stream data, thereby shortening the waiting time of users, effectively solving a problem of check delay of the video stream data, and improving the user experience.

The invention relates to a dynamic V2V link delay predicting method in VANETs to solve the problems that the link delay cannot accurately and practically predicted, the vehicle-mounted network environment and the application requirement cannot be met through the method based on the MANETs, it is very hard for a driver to find out the universal law of automobile node velocity change, and then great difficulty is brought to link delay prediction. The method comprises the steps that firstly, the relative velocity value delta v of two automobiles is calculated; secondly, the relative displacement value delta S of two automobile heads is calculated; thirdly, the average speed difference value u and the variance sigma 2 of the formula seen in the specification are worked out; fourthly, the relative distance L is calculated; fifthly, the mathematical expectation value ET of link delay is calculated. The method is applied to the field of dynamic V2V link delay prediction in VANETs.

The invention provides a method for performing screen capture on a mobile terminal by utilizing a terminal. The method is applied to the terminal for controlling the mobile terminal to perform screen capture. The method comprises: receiving a screen capture instruction from a user on a terminal side; triggering a screen capture interface of the mobile terminal according to the screen capture instruction, calling a screen capture function of the mobile terminal, and starting the screen capture function by the mobile terminal to perform screen capture operation on a screen image of the mobile terminal; receiving corresponding image data frames obtained by the screen capture operation from the mobile terminal in the form of data streams; and combining and converting the image data frames into a screen capture image and performing display. With the adoption of the method provided by the invention, real-time transmission of the image data frames is realized, the phenomena of delay and jamming are eliminated, and user experience is improved.

The invention discloses a method and system for realizing real bullet screen scene simulation feedback in P2P live broadcasting, and relates to the bullet screen technical field in P2P live broadcasting. The method comprises the steps that: a user terminal sends a registration request to a P2P live broadcasting platform server, and registration is realized; the P2P live broadcasting platform server judges the identity of the registered user, if the registered user is a bound mobile phone user, the corresponding video and real-time bullet screen information are obtained and sent to the user terminal for display; and if the registered user is a visitor or not a bound mobile phone user, the corresponding video, real-time bullet screen information and historical bullet screen information in a previous time interval are obtained and sent to the user terminal, the user terminal displays the video and real-time bullet screen information, and the historical bullet screen information is added and displayed in the real-time bullet screen information. According to the invention, the historical bullet screen information is added to the real-time bullet screen information for realizing real bullet screen scene simulation feedback in P2P live broadcasting, so that the bullet screen effect is good, and the experience of the user is good.