58results about How to "Eliminate delay" patented technology

A system 100 for providing credentials to a computational component in a distributed processing network is provided. The system 100 includes: (a) a plurality of crypto-tokens 150a-n, each crypto-token 150a-n comprising a unique identifier, optionally a digital certificate comprising a unique public key and the unique identifier, and a private key corresponding to the public key; (b) a provisioning system 100 comprising a certificate authority 104 operable to generate the plurality of crypto-tokens 150a-n; and (c) a computational component 128 comprising a drive operable to receive and communicate with a selected crypto-token 150. The computational component 128 uses the digital certificate and private key in any of the crypto-tokens 150a-n to establish a secured communication session with the provisioning system 100. Before the establishing operation, any of the plurality of crypto-tokens 150a-n can be engaged with the computational component 128 to establish the secure communication session.

A door entry security device used in a security system including a control panel, the door security device in a housing suitable for mounting within a recess of a doorjamb or door of a premises. In the housing is a lock position detecting switch, adapted to detect the position of a lock mounted on a door as being either locked or unlocked, a door position detecting switch adapted to detect the position of the door as being either open or closed, and processing circuitry adapted to generate a security system disarm signal when (1) the position of the lock has transitioned from a locked state to an unlocked state, (2) the door is closed at the time that a predefined time period has elapsed since the position of the lock transitions from a locked state to an unlocked state, and (3) the door has been opened after that predefined time period has elapsed. The door entry device also has a data transmitter for sending the security system disarm signal to the control panel. An alarm signal is generated and transmitted to the control panel when the door is open at the time that the predefined time period has elapsed since the lock has transitioned to an unlocked state. The control panel prevents the security system from being disarmed when an alarm signal is received unless a user code is entered into the security system.

Disclosed is a symmetric multiprocessor data processing system (SMP) that implements a TLBI protocol, which enables multiple TLBI operations from multiple processors within a partition to complete concurrently. Thus, a global TLB lock, synchronization, and TLB unlock is not necessary. When a TLBI instruction is executed, the master dynamically manages the behavior of the TLBI operation based on asynchronously snooping another TLBI. If concurrent TLBI management is required, then the master dynamically degrades the TLBI to a “barrier” class instruction.

The present invention provides an apparatus and method for concurrently accessing multiple wireless networks, comprising: a host for allocating a plurality of virtual MAC addresses based on the number of the wireless networks to be accessed, and a plurality of virtual MAC devices each having one of the virtual MAC addresses allocated by the host, for accessing the multiple wireless networks concurrently; wherein a physical address of the apparatus is set as a transmitter or receiver address of frames for accessing the multiple wireless networks concurrently.

This invention relates to a quick switching method for HMIPv6 within MAP domain. It contains affirming the switching in MAP domain by proxy router to construct new link care-of address, original access router sending switch triggering to all possible new access router which checks said care-of address and then sending local binding updating of new link care-of address, MAP buffering local binding information, MAP redirecting the database sent to mobile node according to preset strategy, the receiving, transmitting package not needing the tunnel through original router and new router. Said invention raises mobile switching speed and quality.

A system for making processed meat products employing a feed-forward analysis wherein input streams are analyzed and their flow rates are controlled relative to each other. The system incorporates mixing devices in a housing through which the input streams are forced. The mixing devices provide high shear mixing and blending, and in some cases maceration and salt infusion for rapid protein extraction.

The invention discloses an underwater sound communication device and a method based on time reversal and orthogonal frequency division multiplexing (OFDM) combined treatment. The underwater sound communication device comprises a signal transmitter, a power amplifier, a transmitting transducer, a receiving hydrophone array, a signal receiver and a signal processor, wherein the signal processor comprises a broadband Doppler estimation and compensation module, a time reversal processing module, an OFDM demodulation module, a channel estimation and compensation module and a frequency deviation estimation and compensation module. In the underwater sound communication device, the space time focusing characteristics of the time reversal are utilized to eliminate the multipath influence of the channel; a pulse channel response length can be shortened by the time reversal so as to reduce the length of an OFDM symbol guard interval and improve the communication efficiency; and because the guard interval is reduced, the length of the OFDM symbol can be shortened so as to enlarge a subcarrier frequency interval. With the method disclosed by the invention, interference among subcarriers can be reduced, and the available rate of the OFDM underwater sound communication is further improved.

The invention belongs to the technical field of electric locomotive traction control and particularly relates to a control modulation method for a high-power direct-drive permanent magnet synchronousmotor. In order to achieve the accurate decoupling of the high-power direct-drive permanent magnet synchronous motor, improve anti-disturbance performance, reduce the dependence of traditional controlon motor parameters, reduce the number of control parameters, and improve the robustness of a whole locomotive system, the present invention provides the control modulation method for the high-powerdirect-drive permanent magnet synchronous motor. The modulation uses a SHEPWM strategy. Compared with a traditional SPWM method, the SHEPWM method can eliminate specific-order harmonics and reduce thedesign difficulty of a filter. In addition, the method uses a comparison value mode in a SHEPWM pulse generation process, can shorten the delay of a switching angle compared with a conventional forced mode, realizes the SHEPWM pulse generation at high precision, effectively eliminates the specific-order harmonics, and reduces the low-order harmonic content of the current.

The invention relates to a time synchronization method in a quantum network. According to the method, a user emits signal photons to a server through the quantum network and records emitting time T1; the server receives the signal photons and records receiving time T2; the server emits the signal photons to the user and records emitting time T3; the user receives the signal photons emitted by the server and records receiving time T4; time delay of a relay station is recorded, so that time relay indeterminacy of the signal photons passing through the relay station can be eliminated, and therefore, time consumed by the emission of the signal photons from the user to the server through the relay station and by means of the quantum network and time consumed by the emission of the signal photons from the server to the user through the relay station can be identical, and the accuracy of time synchronization can be improved.

In one embodiment of the present invention, a magnetic lens is provided that can generate a substantially constant amount of average heat power over a pre-selected range of resultant magnetic field strengths. The lens is configured to do this with multiple, asymmetric (different turns) coil sections that can produce a desired range of field strengths, and at the same time, maintain a sufficiently constant temperature signature when the average total power is maintained constant thereby eliminating unreasonable delays in lens operation when the resultant field strength is changed. The asymmetric lens structure allows for the smaller coil to be made with less relative inductance thereby making it more responsive and amendable for an AC drive signal and thus dynamic focusing applications if desired. Thus, a magnetic lens is now provided that can produce a range of magnetic beam-focusing field strengths, implement dynamic focusing, and not impose unreasonable delay for thermal stabilization between changes in magnetic field strength.

An object of the present invention is to provide means for eliminating a transmission delay when transmitting emergency information for the sake of relief, security, or the like in a wireless device in conformity with the wireless LAN standard in which if radio waves transmitted from peripheral devices are detected, transmission has to be stopped. In a multimode wireless communication scheme having two or more communication schemes, priorities of the communication schemes are set. A high priority or low priority regarding to a message is described in a“message type” data field of a frame of a controlling channel output from the access point side to the terminal side. When the frame of the controlling channel is decrypted on the terminal side, the message type is confirmed, so that the type of a service channel used thereafter is confirmed and the channel is coupled.

The invention provides a video coding and decoding method and device. The method comprises: extracting a video image frame to be decoded from a received coded video stream, wherein the video image frame comprises at least one Coding Unit (CU); if the CU uses a coding mode which is an inter-frame mode, determining a motion vector by adopting a bidirectional prediction mode, and determining whetherconstraint conditions of starting a bidirectional optical flow (BDOF) or decoding motion vector correction (DMVR) are met; if the constraint conditions of starting the BDOF and DMVR are met at the same time, according to a designated reference information value, selecting the BDOF to correct the reference pixel of the CU or selecting the DMVR to correct the motion vector of the CU, wherein the designated reference information values corresponding to BDOF and DMVR are different; and decoding the coded video stream by using the motion vector of the corrected CU. The video coding and decoding method and the video coding and decoding device provided by the invention solve the low processing efficiency and time delay when the video coding and decoding are carried out by a conventional video coding and decoding method.

Methods and systems for preparing a sample for thin film analysis are provided. One system includes an energy beam source configured to generate an energy beam. The system also includes an energy beam delivery subsystem configured to direct the energy beam to a sample and to modify the energy beam such that the energy beam has a substantially flat-top profile on the sample. The energy beam removes a portion of a contaminant layer on the sample to expose an analysis area of a thin film on the sample. One method includes generating an energy beam and modifying the energy beam such that the energy beam has a substantially flat-top profile. The method also includes directing the energy beam to a sample. The energy beam removes a portion of a contaminant layer on the sample to expose an analysis area of a thin film on the sample.

The embodiment of the invention provides a satellite communication system and method, and the system comprises a low-orbit satellite LEO network, a medium-orbit satellite MEO network, and a high-orbitsatellite GEO network, and the GEO network is used for the data transmission with the MEO network. The MEO network is used for carrying out data transmission with the GEO network and the LEO networkrespectively; and the LEO network is used for carrying out data transmission with the MEO network and the ground communication collateral dredging. The embodiment of the invention provides a satellitecommunication system. Large-area communication coverage can be realized through a small number of satellites included in the GEO network, the MEO network and the LEO network; moreover, through a small number of satellites included in the multi-layer satellite network, the number of satellite network nodes is reduced, the frequent degree of route switching is reduced, and the transmission delay ofa satellite communication system is also reduced to a certain extent.

The embodiment of the invention discloses a data interaction method of an ore pond and an ore machine, an agent terminal, the ore pond and a system. The method applied to an agent terminal side comprises the following steps: respectively establishing connection with the ore pond and multiple ore machines in response of a request of establishing the connection between the multiple ore machines and the ore pond, wherein the multiple ore machines belong to the same local area network; receiving task data sent by the ore pond and sending to the corresponding ore machine; and sending result data fed back by the corresponding ore machine to the ore pond. By use of the method disclosed by the embodiment of the invention, the agent terminal can be added between the ore pond and each ore machine, the ore pond issues the tasks to the ore machine through the agent terminal, and each ore machine feeds back the result data to the ore pond through the agent terminal; the downlink bandwidth between the ore pond and each ore machine is effectively reduced through the processing of the agent terminal, and the bandwidth congestion at the ore field is avoided; therefore, the delay in task issuing is eliminated, and the task transmission is accelerated.

The invention discloses an aircraft guidance and control integrated design method based on a preset time sliding mode, and belongs to the technical field of aircraft guidance and control. The method comprises the following steps: establishing a guidance and control integration-oriented nonlinear mathematical model of an aircraft; designing an extended state observer, and observing the total disturbance within a preset time; and designing a sliding mode controller, and realizing compensation of observation disturbance and convergence of a control quantity within a preset time. According to the invention, the expansion state observer is designed by applying a preset time theory, so that the observer completes disturbance observation within a preset time; the state tracking and keeping in the preset time are realized; according to the method, convergence is controlled in the preset time, the system state convergence time is not affected by the initial state of the system, the parameters can be preset, and the time delay problem between a guidance loop and a control loop is eliminated on the basis that coupling between aircraft channels is fully considered by using a full-state coupling guidance control integrated architecture.

The invention discloses an optical fiber asynchronous triggering-based high-speed rail substation-used cable partial discharge positioning device, which comprises a high-frequency current sensor, a partial discharge acquisition module, a triggering and communication module and a data analysis module, wherein the partial discharge acquisition module adopts digital filtering and amplification conditioning, partial discharge signals sensed by the high-frequency current sensor are subjected to analog-to-digital conversion, the data are then transmitted to an upper computer through the triggering and communication module, and synchronous data are calculated by data analysis by upper computer software, and partial discharge positioning is carried out. The triggering signals sequentially triggerthe acquisition devices through the optical fiber, the acquisition devices sequentially acquire partial discharge signals, the signals are then transmitted to the upper computer through the optical fiber, the upper computer can realize ns-level synchronization accuracy of the acquired data after compensation based on inherent delay between acquisition devices, and thus, partial discharge positiondiagnosis can be carried out.

A 3D printer controller comprises a processor and a programmable logic device. The processor is used for receiving code data, generating movement block data based on the code data and sending the movement block data to the programmable logic device. The programmable logic device is used for receiving and temporally storing the movement block data, generating corresponding pulse signals based on the movement block data, and an S-shaped pulser is adopted as the programmable logic device. According to the 3D printer controller, the problem that in the prior art, only an MCU is adopted as master control, and consequently the printing precision is not high can be solved. The invention further discloses a 3D printer control method.

The embodiment of the invention discloses a signal compensation method, and the method comprises the steps: obtaining the operation posture information and the actual position information of a radar,correcting the actual position information according to the operation posture information, and obtaining the target position information of the radar; determining actual distance information between the radar and the target, and determining target distance information between the radar and the target according to the actual distance information and the target position information; and performing compensation processing on the echo signal received by the radar according to the target distance information to obtain a compensated echo signal.

The invention provides an action recognition method and device, wearable equipment and a computer readable storage medium, and the method comprises the steps: obtaining the human body posture data, collected by the wearable equipment, of a user at preset intervals; extracting action characteristics from the human body posture data; according to the first preset action knowledge, the action recognition parameters and the action characteristics, identifying that an action corresponding to the human body posture data is a static action or a dynamic action; if the action corresponding to the humanbody posture data is a static action, identifying the action corresponding to the human body posture data as static standing or static sitting according to second preset action knowledge and action characteristics; if the action corresponding to the human body posture data is a dynamic action, identifying that the action corresponding to the human body posture data is walking or running accordingto third preset action knowledge and action characteristics; wherein the action recognition parameters are parameters initialized according to static data of static standing of the user. The scheme is low in action recognition cost, low in complexity and high in universality.

The invention discloses a measuring device and a measuring method of signal power in an orthogonal frequency division multiplexing (OFDM) system, By means of the measuring method and the measuring device, the accuracy of signal power measurement is improved. The measuring method includes the steps of: converting time domain data of a base band into frequency domain data of the base band, obtaining modulation signs carried by all the sub-carriers, estimating channels of reference signals primarily, and measuring the signal power. The measuring method further includes the steps of: selecting the frequency domain range and the time domain range of the measured signal power of the antenna ports; Segmenting the frequency domain range and the time domain range in rows and in columns; calculating mean value of elements in each section; and computing the signal power of each antenna port according the mean values of the elements in the sections.

The invention discloses a DSP hardware sampling delay compensation method based on a PWM synchronization mechanism. The method comprises the following steps of: calculating the delay duration of a hardware sampling circuit; configuring to enable the SOCB to trigger the ADC sampling operation according to the PWM module; determining a set value of the CMPB register; when the subtraction count of the PWM counter is equal to the set value of the CMPB register, triggering ADC acquisition; and through synchronous setting of the PWM module, performing fixed-time phase compensation on ADC sampling trigger time. According to the invention, artificial time delay is carried out on the trigger sampling time, so that inherent time delay in a hardware sampling circuit can be eliminated, especially for sampling quantities such as inductive current with special requirements on the sampling time, the sampling precision is ensured, and the stability of a digital control system is improved.