48 results about "Time delays" patented technology

The invention provides a network anomaly monitoring method and device. The method comprises the steps that a plurality of network data objects reported by a server in a business service platform in a time period to be analyzed are acquired, wherein each network data object comprises the network time delay of a client accessing the server and the generation time of the network time delay; the plurality of network data objects are clustered based on the density distribution of the generation time of the network time delay to acquire a plurality of clusters; according to the distribution of the network time delay in many clusters, abnormal clusters of network delay anomalies are identified from many clusters; and based on the generation time of the network time delay included in the abnormal clusters and the network registration information associated with the network data objects included in the abnormal clusters, network anomaly analysis is carried out. According to the invention, network access anomalies in the business service platform accessing time of the client can be detected and located in time, which can improve the network quality of the business service platform.

Provided is a method for preparing a two-dimensional metallic photonic crystal structure in large area through femtosecond laser direct writing. The invention provides a method and experiment device for preparing the periodically-distributed two-dimensional photonic crystal structure with the feature size being the sub-micron dimension in one step in the large area by focusing identical-wavelength double-pulse femtosecond laser on the surface of metal through a plano-convex cylindrical lens, and the identical-wavelength double-pulse femtosecond laser is obtained based on the spectrophotometry of birefringent crystals and has the features of collinear transmission, cross polarization and picosecond time delay. Two-dimensional periodic structure patterns can be effectively regulated and controlled by changing the energy and the number of pulses of input laser, the thicknesses and the azimuth angles of the birefringent crystals and the like. Through the combined design of different linear polarization directions and the variable time delay feature of two femtosecond laser pulses and focusing of the cylindrical lens, preparation of the two-dimensional metallic photonic crystal structure within the large area is achieved conveniently and quickly. The novel preparation method adopting the double-pulse femtosecond laser with cross polarization and variable time delay has potential important applications in the field of material micro-nano processing and preparation.

The invention discloses a method for determining a decompression algorithm and a system thereof, before the transmission of the compressed information to be exchanged by a communication end and a communication opposite end, the communication end send a request of a compression algorithm protocol to the communication opposite end which negotiates with the communication end to select out a compression algorithm supporting by both parts. The invention, as the two communication parts negotiate and select out a compression algorithm supported by both parts, in the following information exchange process, can compress/decompress information by the local supported compression algorithm thereof, thereby reducing decompression time as well as the time delay of information exchange.

The invention discloses a novel model-free adaptive sliding mode control method for a hybrid type automobile electrophoretic-coating conveying mechanism. The method comprises the following steps: firstly, for the hybrid type automobile electrophoretic-coating conveying mechanism, acquiring a mechanism kinetic model capable of comprehensively reflecting kinetic characteristics and also capable of realizing real-time control on line and in real time according to a time delay estimation technology; then designing a time delay estimation-based sliding mode controller based on the kinetic model acquired according to time delay estimation; further, designing a novel adaptive law for a switching gain of time delay estimation-based sliding mode control, thereby obtaining an adaptive sliding mode controller which does not need upper-bond information of an uncertain system of the conveying mechanism; finally, realizing model-free adaptive sliding mode control of the conveying mechanism through software programming. The novel model-free adaptive sliding mode control method can enable a system to be high in tracking performance under the condition of not using the upper-bond information of theuncertain system of the conveying mechanism, and no mathematical model for the conveying mechanism is required to be built; furthermore, sliding mode control chattering can be effectively weakened.

The invention relates to an FPGA-based high precision time interval measurement method. The method comprises the following steps: performing rough measurement on the time intervals between two pulsesby adopting a pulse filling counting method to obtain a rough measurement result of the time interval; based on an FPGA tap delay chain, performing fine measurement on a phase difference less than a clock cycle to obtain a fine measurement result of the time interval; and determining a final measurement result of the time interval according to the rough measurement result and the fine measurementresult. According to the method, a wide range of time intervals can be measured by combining the rough measurement and the fine measurement and utilizing the high precision time delay interval of tensof picoseconds of an FPGA delay unit. The invention also discloses an FPGA-based high precision time interval measurement system.

A method and device for wireless data transmission between a base station and one or more transponders, in which electromagnetic carrier waves are emitted by the base station and symbols are transmitted from a given transponder to the base station by modulation and backscattering of the electromagnetic carrier waves, wherein a change in a modulation state takes place synchronously with synchronization markers transmitted by the base station. A change in the modulation state is carried out by a transponder with a specifiable time delay that is relative to the synchronization markers.

The invention provides an information transmission method and device. The information transmission method comprises the following steps: an IAB donor entity part transmits the information to the DU, wherein the information is used for indicating the DU to perform link state switching. By adoption of the scheme, the DU performs link state switching in time according to the received information, sothat the flexibility of link switching is improved, and long-time interruption time delay is avoided, and the problem of link interruption time delay caused by complex link switching process in the IAB network in the related art is solved.

The invention discloses a sub-frame distribution system and a method. The sub-frame distribution system comprises: a parameter acquisition unit used for acquiring the system parameter of a communication system; a sub-frame dividing unit used for dividing each data frame of the communication system into a plurality of sub-frames according to the system parameter; and a sub-frame distributing unit used for respectively distributing sub-frames dedicated to down business to the down business and sub-frames dedicated to up business to the up business according to the requirements of the down and the up businesses of the communication system. Through the invention, the feedback time delay of the system can be decreased, thus meeting the business requirements of high-speed mobile users.

The invention provides a beam processing method, a base station and a terminal. The beam processing method comprise the steps of receiving a first beam report reported by the terminal, wherein the first beam report includes the identification of a first preset number of transmitting beams; selecting a second preset number of transmitting beams from the first preset number of transmitting beams according to terminal capacity information or identification of a receiving beam group which is included in the first beam report and corresponds to each of the transmitting beams, wherein both the firstpreset number and the second preset number are greater than or equal to 2; and transmitting information of the second preset number of transmitting beams to the terminal, and transmitting a control channel and a data channel through the second preset number of transmitting beams, thereby being capable of improving the link recovery speed, reducing the time delay caused by the link recovery, and improving the user experience.

The invention discloses an intelligent traffic light control system based on human traffic detection and relates to the technical field of intelligent traffic. The system comprises a traffic light module, a human traffic and motor vehicle detection module, a human traffic counting display module, an alarming module and a time-delay module, the system takes infrared sensors as cores and takes an STC89C52 microcontroller as a basic control device of the system, the traffic light is automatically controlled by using human traffic data which is monitored by the infrared sensors on two sides of a pedestrian crossing so that duration change can be displayed suitably, and the infrared sensors are arranged on a left-turn lane to detect whether or not a motor vehicle alarms to remind pedestrians of taking care. The intelligent traffic light control system based on human traffic detection effectively solves crowd traffic especially traffic problems in particular to jammed intersections and collision of pedestrains and motor vehicles, and has good application prospects and significance.

The invention discloses a method for building a fractal dimension-based multi-phase mixed effect prediction model, which comprises the following steps of: (1) acquiring a multi-phase stirring mixing real-time pattern by using electron tomography or a high-rate camera; (2) computing the fractal dimension of the acquired real-time pattern by using a compiled box dimension computation program; (3) acquiring previous relative data of each period at every interval by using the method in step (2) to obtain a corresponding time sequence; (4) computing a time delay variable, an embedded dimension and a bandwidth by using the time sequence obtained in step (3) and by using a phase reconstruction method; (5) processing the time sequence in the step (3) by using a one-step-forward method and kernel regression prediction to obtain an entire time sequence; and (6) testing and verifying a prediction error by using an experimental method. The invention provides a reliable and practical prediction method for predicting the mixed effect of chemical engineering experiments and theoretically instructing stirring reactor design, stirring operation and correction experiments.

The invention discloses an automatic volume adjustment method and device of a vehicle-mounted player of a bus. The automatic volume adjustment method includes the steps that voltage signals between the positive pole and the negative pole of a loudspeaker of a bus-stop reporter are collected and pre-processed; amplitudes of the pre-processed voltage signals are compared with voltage threshold values at a time interval, and a corresponding adjustment instruction is formed according to a comparison result; the volume of the vehicle-mounted player is adjusted according to the adjustment instruction. Compared with a loudspeaker sound signal collecting method in the prior art, the voltage signals between the positive pole and the negative pole of the loudspeaker are collected, the adjustment instruction is generated according to the voltage signals, interference of external sounds is effectively removed, and adjustment precision is improved; additionally, electrical signals are directly collected, conversion from the voltage signals to the sound signals and from the sound signals to the electrical signals in the prior art is avoided, adjustment time delay is reduced and adjustment real-time performance is guaranteed.

The invention discloses a monitoring system, especially an automatic wireless control system of a fluid container liquid level height. The system comprises a wireless liquid level detector, a controller and a handheld remote controller. The wireless liquid level detector only requires a piece of single point liquid level information in a liquid level sensor detection container to cooperate with the controller with a triggering-timing mechanism so that the automatic liquid level control is realized; at the same time, liquid level information changes of the liquid level sensor is detected in a time-delay manner to realize automatic detection of water source shortage and water pump abnormity so that the water pump is protected; and the handheld remote controller is used to simulate the liquid level detector to carry out manual remote control operation of a water supply and sewage control system. The system of the invention overcomes the problem in the prior art that the multi point liquid level is detected to realize the automatic water supply and sewage; at the same time, the method of detecting the liquid level probe in a time-delay manner maximizes the function; since only the power-on signal is transmitted, the service life of the power supply source especially the battery device is substantially prolonged; and the manual remote control method prevents the problem that the water pump needs shutting down manually.

A circuit with a switch-off device for the operation of light sources (Lp), has the following features: a self-commutated half-bridge inverter having a series circuit of an upper electronic switch and a lower electronic switch, which are joined at a half-bridge midpoint and are connected between a supply voltage and a ground potential, a start capacitor which is joined via a trigger element to a control electrode of the lower electronic switch, and a switch-off device having an input and an output, which are configured and connected so that they discharge the start capacitor if a switch-off signal is applied to the input. The switch-off device contains a time delay. In order to be able to keep the components in the time delay small, it is proposed that the switch-off device should comprise two successively connected transistor stages with bipolar transistors.

The invention discloses a wireless resource control method of a cellular Internet of Things, which comprises the following steps: after a terminal of the cellular Internet of Things is connected withaccess network equipment, the access network equipment acquires context information of the terminal in real time, and analyzes the context information to acquire service characteristics of the terminal; the access network equipment configures the corresponding connection configuration parameters according to the service characteristics so as to reduce the time delay of waiting for sending after the data service of the terminal is generated and reduce the time of the terminal in a connection service-free state; the access network device sends the configuration result to the terminal through theRRC message; after receiving the RRC message, the terminal executes corresponding configuration and performs Internet of Things service data transmission based on a configuration result; and after each transmission is completed, the access network equipment updates the context information of the terminal. The service characteristics of the Internet of Things terminal can be analyzed, the terminalis configured to enter the connection management mode corresponding to the service mode according to the service characteristics, and diversified Internet of Things service requirements are met.

The invention provides a circuit structure for eliminating short circuit currents. The circuit structure for eliminating the short circuit currents is characterized in that the circuit structure for eliminating the short circuit currents at least comprises a first level driving circuit and a first time delay unit, wherein the first level driving circuit is at least provided with a first input end, a first output end and a second output end, and the first time delay unit is arranged between the first output end and the second output end and comprises a first transistor and a second transistor. The moments of switching on and switching off of switches in a complementary type circuit are staggered through a short time delay, short circuit currents Is causing instability of the circuit are eliminated fundamentally, and safety and stability of the whole circuit are protected. Meanwhile, due to the fact that the electrical signal output of the first output end and the electrical signal output of the second output are asynchronous, the moments of switching on and switching off of the switches in the follow-up cascaded complementary type circuit are staggered, and the effect of eliminating the short circuit currents causing instability of the circuit is performed. The circuit structure for eliminating the short circuit currents has the advantages of being safe, stable, free of short circuit loss, low in cost and the like, and is suitable for innovative improvement of a standard cell library.

[Problem] To provide a simple and economical device capable of providing an excellent sound field in accordance with the listener's preferences by adjusting the listener's interaural correlation coefficient. [Solution] A sound field adjustment filter (5) is provided with a pair of filter circuit groups (5L, 5R) corresponding to a left and right channel. This sound field adjustment filter divides a desired frequency band of the audio signal into multiple frequency bands and assigns prescribed transmission characteristics so as to generate a sound field adjustment signal for each frequency band such that a prescribed impulse response is configured cooperatively for the entire desired frequency band of the audio signal. The transmission characteristics adjust the audio signal for each split frequency band by the addition of time delay and gain. By means of operation output units (4L, 4R), the sound field adjustment filter (5) adds the sound field adjustment signals generated by each of the filter circuit groups (5L, 5R) to the audio signal of the other of the channels, and outputs the result to stereo speakers (2). The opening angle of virtual speakers with respect to the listener is changed by adjustment of the sound field adjustment signals so as to approximate the interaural correlation coefficient of a specific diffuse sound field.

The invention provides a discovery process time delay optimization method of a bluetooth device. The discovery process time delay optimization method of the bluetooth device comprises a device query time delay optimization method and a self-adaptive random backward time delay optimization method based on a back off algorithm. After device query time delay optimization, average value time of search scanning time is just 0.48 times of former time. When querying scanning child devices are increased, the self-adaptive random backward time delay optimization method based on the back off algorithm increases random backward time delay to avoid conflict of loopback bags. The discovery process time delay optimization method of the bluetooth device can achieve optimization of optimization objectives, is simple and easy to achieve, and has good application prospect.

The invention discloses a new energy automobile charging control system which comprises the following parts of new energy automobiles 1, a control center 2, user phones 3, charging piles 4 and a powergrid 5. The charging automobiles are accurately distributed to the charging piles according to the time sequence, charging is standard and controllable, and charging and discharging control efficiency is brought into full play. In the whole automobile dispatching process, the automobiles do not need to queue up to wait, queuing time delay is reduced, the time required for charging and dischargingis shortened, due to the fact that voice or video call data packages serve as channel carriers, channels can be established between automobile users and the control center at any time, hidden addresses are embedded in effective information of the data packages, the capacity of the channels is greatly increased, and the channels are unlikely to interfere in each other when the automobiles are multiple.