68results about How to "Reduce transmission frequency" patented technology

Disclosed are a beam forming method and a multiple antenna system using the same. There is provided a multiple antenna system which forms optimal beam patterns through a transmission of a training sequence between a transmitter and a receiver, each including a plurality of antennas, the multiple antenna system comprising: a transmitter selecting antennas to be activated according to a level and transmitting the training sequence to a receiver through the selected antennas; a receiver selecting the antennas to be activated according to the level and transmitting to the transmitter an index of an optimal transmission weight vector significantly reducing a cost function based on the training sequence transmitted from the transmitter, wherein the transmitter selects antennas so that the beam patterns formed by the antennas selected at a q-th level (q: the index of the level) include the beam patterns formed by the antennas selected at a q+1-th level. As a result, the transmission frequency of the training sequence may be reduced.

A sensor device includes an ultrasonic sensor and a sensor cover in the form of a foil, the ultrasonic sensor having an oscillatory sensor element, which is affixed inside a housing, having an end face, of the ultrasonic sensor, the ultrasonic sensor being able to be accommodated in a recess or bore hole of an external vehicle component, and the sensor element and the housing being able to be covered by the sensor cover on the outside, the sensor cover being mountable directly on the ultrasonic sensor and forming an at least essentially planar surface whose outline is adapted to the outline of the end face of the housing and coincides in an essentially flush manner with the end face of the housing of the ultrasonic sensor, and the sensor cover reflecting light having a color spectrum in the range of chrome color and a reflection capacity in the range of polished chrome.

According to the invention, to improve the quality of a voice transmission via an air interface (LS) provided for voice data and general data transmission (DAT), it is first verified whether the data (DA, DB, DAT) to be transmitted via the air interface (LS) is voice data (DA, DB). If so, a specific forward error correction method for voice transmission is enabled, which is applied to the voice data (DA, DB) in the context of its transmission via the air interface (LS).

Provided is a replacement necessity determination device for a snap-in valve having an inner end to which an air pressure detection device including an air pressure sensor and an acceleration sensor is coupled. A control device of the replacement necessity determination device is configured to predict an angle change amount of the snap-in valve and the air pressure detection device with respect to a wheel caused by a centrifugal force based on a rotational speed of the wheel and an acceleration detected by the acceleration sensor, calculate a degradation indication value of an elastic body of the snap-in valve based on a maximum value of the angle change amount during a period set in advance, and determine necessity of replacement of the snap-in valve based on an integrated value of the degradation indication value.

Duplex operation for ultrasound imaging uses a single fixed voltage level. Both B-mode and color-mode imaging are performed using a power level that may be less than the power level for single-mode B-mode imaging, and may be greater than the power level for single-mode color-mode imaging. A duty cycle of color-mode pulses may be reduced. To enhance image quality, the number of cycles in the B-mode pulse profile may be increased. To enhance image quality, the center frequency of the B-mode pulse profile may be reduced, and dynamic filtering for B-mode received pulses may be appropriately modified.

An airborne ElectroMagnetic (EM) survey system wherein the system includes; first, a series of transmitter coils, which induce a primary (EM) field into the earth resulting in a secondary EM field being created in any sub-surface electrically conductive bodies; and second, a set of three orthogonal receiver coils which detect the secondary EM field. Multiple transmitter coils through which an electric current is pumped, form part of the structural, aluminum framework of a multi-rotor drone. The receiver sensor may be an EM induction sensor, comprised of multi-turn, copper windings, mounted inside an aerodynamic bird and separated by non-conductive sphalerite, which acts as an electrical insulator to limit self-induction and capacitance.Additionally a lighter-than-air balloon may be used to add vertical lift and increase a pendulum effect.

The invention discloses a method for sharing multi-interval transient traveling wave signals of an intelligent substation in real time. The method comprises the steps that the voltage and current signals of a measurement line are collected by each merging unit in real time; an edge detecting method is utilized for carrying out fault feature extraction on real-time sampling data; sampling value message information is reconstructed, and a set of traveling wave feature values used for judging a fault line is added to an ASDU; meanwhile, the merging units reduce message transmission frequency, and 100M Ethernet downward traveling wave message transmission frequency is reduced to the power frequency signal sampling frequency of 1,000 Hz; IED equipment is protected and controlled to receive and analyze traveling wave messages sent by the merging units, and the fault line is judged according to fault feature values including in the messages. The data processing capacity of the merging units is utilized for expressing the effective fault features of the transient traveling wave signals, the performance of a substation protection and control system is improved by fully utilizing fault full spectrum band information, the real-time performance of the communication of a substation process level can be guaranteed, and high practical value is achieved.

The invention discloses a timing sequence generating circuit for improving the definition of a light-emitting diode (LED) display screen with gray scale. The timing sequence generating circuit comprises a sub-field pulse signal processing circuit, a sampling pulse signal frequency dividing circuit, a luminance setting circuit, a 6BIT data beam concentrating circuit and one-from-multiple selecting circuit. The 6BIT data beam concentrating circuit converts high six-figure data in input data into a group of serially output pulses with high-low electrical levels concentrated together by means of a data weight-free encoding change method, the output end of the sampling pulse signal frequency dividing circuit outputs serial shift pulse with unique frequency, and width equivalence and beam concentration of the high six-figure data are achieved. In consideration of transmission frequency, rest low-position data are not required to be processed. Only the timing sequence generating circuit in a control system is changed, a drive mode of a display unit is not changed, the transmission characteristics of serial signals are not changed, the definition of the LED display screen is improved under the condition that the system cost is not increased, and the timing sequence generating circuit has great actual using significance and popularization value.

A server and a method of transmitting data thereof, and a mobile device and a sensing method thereof are disclosed. The sensing method includes receiving sensing data obtained according a user behavior pattern from at least one device, analyzing state information of the sensing data, and changing a user processing data according to an analysis result of state information of the sensing data.

The invention provides a self-adaptive preset performance trajectory tracking control method considering input quantization. The method comprises the following steps: establishing an under-actuated underwater vehicle mathematical model; establishing a dynamic error model; performing preset performance error conversion; designing a controller; analyzing and proving stability; according to the method, unmodeled hydrodynamic force, ocean current interference and quantitative input adaptive preset performance trajectory tracking control problems are considered, a control algorithm is designed by using a backstepping method based on specified filtering and a minimum parameter learning algorithm, and the problems of differential explosion and complex calculation caused by a neural network are effectively avoided; in order to enable the tracking error to have the property of preset performance, a mapping function is applied to convert a constraint control problem into an unconstrained control problem. According to the invention, the hysteresis quantizer is adopted, so that the data transmission frequency is greatly reduced, and the quantization error is effectively reduced.

The invention provides a network switching method, a network switching device and a terminal. The network switching method comprises steps of: detecting a working state of the terminal; according to the working state of the terminal, determining a target network corresponding to the working state; and switching to the target network. In this way, an applicable network can be chosen for the terminal in different application scenes; actual habitats of users can be adapted; emission efficiency of the terminal can be effectively reduced; power consumption is reduced; stand-by time of the terminal is increased; and user experience is improved.

A terminal device (1) is provided with: a trigger judging section (6) judging whether an event trigger for performing handover from a macrocell to a CSG cell has occurred or not; a first measurement result reporting section (7) transmitting a first measurement result report which includes the PCI of a CSG cell for which an event trigger has occurred, to an eNB; a CGI detecting section (9) detecting the CGI of the CSG cell for which the event trigger has occurred, on the basis of measurement setting information transmitted from the eNB; and a second measurement result reporting section (10) transmitting a second measurement result report which includes the detected CGI, to the eNB. When event triggers have continuously occurred, a report transmission controlling section (13) controls transmission of the measurement result reports on the basis of the reception qualities of the CSG cells to reduce the frequency of transmission of the measurement result reports. Thereby, it is possible to control waste of wireless resources and prevent communication interruption from frequently occurring.

A router device includes a lower-layer information acquisition section for acquiring connection information of whether or not connected with a base station in an external network from a lower layer, and a route judgment section for transferring the received packet to the base station in the case of being connected with the base station and judging a transfer destination by looking up a routing table in the case of not being connected with the base station, when receiving a packet destined for a terminal in an external network from a radio terminal device in a same local network. Because the received packet is transferred to the base station during connection with the base station, the packet can be transferred to the external via the router intended by the terminal. Furthermore, the load in the local network can be reduced.

Disclosed is a display device that reduces a data transmission frequency, thereby minimizing generation of EMI noise and realizing high resolution. The display device includes a display panel to display images, a gate driver to drive gate lines of the display panel, a data driver to drive data lines of the display panel, a timing controller to control the gate driver and the data driver and to arrange and supply display data to the data driver, and N (N is a natural number greater than 1) data ports to transmit the display data while being synchronized with N low-speed clock signals having a lower frequency than a clock signal necessary to transmit the display data in the timing controller.

The invention provides an encoding method based on an LVDS (low-voltage differential signaling) interface and a device utilizing the method. The encoding and decoding method based on the LVDS interface includes: acquiring a gray scale of RGB (red, green and blue) image data in to-be-coded data, determining the gray scale as a preset specific gray scale; setting indication marks so that a decoding side can acquire that to-be-decoded data are data corresponding to the preset specific gray scale; changing positions of specific digits of binary numbers corresponding to the RGB image data so that transmission frequency of the RGB image data is reduced after positions are changed. The invention further provides a decoding device based on the LVDS interface.

The invention provides an encoding and decoding method, device and system based on an LVDS (Low Voltage Differential Signaling) interface, which relates to the field of liquid crystal displays and is invented to avoid electromagnetic interference problem. The encoding method comprises the following steps of obtaining gray scale of RGB (Red Green Blue) image data in data to be encoded; determiningthe gray scale as a preset specific gray scale; setting an indicating identifier so that an decoder can obtain that the data to be decoded is the data corresponding to the preset specific gray scale according to the indicating identifier; and carrying out transposition on specific digits of binary number corresponding to the RGB image data so that the transmission frequency of the RGB image data is reduced after the transposition. The encoding and decoding method, device and system based on the LVDS interface can be used for data transmission of the LVDS interface.

The invention is suitable for the technical field of communications, and particularly relates to a spurious suppression device and method. The device comprises a power amplifier, a duplexer and a harmonic suppression circuit, wherein an output end of the power amplifier is connected with a transmitting end of the duplexer; a common port of the duplexer is connected with an input end of the harmonic suppression circuit; and the harmonic suppression circuit is used for controlling input impedance of the harmonic suppression circuit to be matched with output impedance of the harmonic suppression circuit, and controlling resonant frequency of the harmonic suppression circuit to be the same as transmitting frequency of a signal to be transmitted. Through arrangement of the harmonic suppression circuit which is connected with the common port of the duplexer, the input impedance of the harmonic suppression circuit is controlled to be matched with the output impedance, and the resonant frequency of the harmonic suppression circuit is controlled to be the same as the transmitting frequency of the signal to be transmitted, so that the influence of the harmonic suppression circuit on the transmitting frequency of the signal to be transmitted is relatively small; harmonic signals are attenuated greatly; spurious interference can be reduced; and the receiving sensitivity is increased.

An adaptive algorithm based battery-powered long distance wireless temperature and humidity sensor module. The sensor module uses an adaptive algorithm to transmit data on an event basis and / or a reduced basis to extend battery life to more than 10 years. It also uses a low power wireless transmitter which has frequency of sub-1 GHz and an effective transfer distance of up to 250 meters, a low power temperature and humidity sensor, and a long lasting lithium battery which has shelf life of 20 years.

Disclosed are a beam forming method and a multiple antenna system using the same. There is provided a multiple antenna system which forms optimal beam patterns through a transmission of a training sequence between a transmitter and a receiver, each including a plurality of antennas, the multiple antenna system comprising: a transmitter selecting antennas to be activated according to a level and transmitting the training sequence to a receiver through the selected antennas; a receiver selecting the antennas to be activated according to the level and transmitting to the transmitter an index of an optimal transmission weight vector significantly reducing a cost function based on the training sequence transmitted from the transmitter, wherein the transmitter selects antennas so that the beam patterns formed by the antennas selected at a q-th level (q: the index of the level) include the beam patterns formed by the antennas selected at a q+1-th level. As a result, the transmission frequency of the training sequence may be reduced.

The invention relates to a big data acquisition system and method. The big data acquisition system comprises a data acquisition module, a data aggregation module and a data receiving module, the dataacquisition module comprises one or more agent units; wherein the agent unit is deployed on a data device to be collected, and the agent unit is used for collecting operation data and sending the datato the data aggregation module for aggregation and preprocessing; the data receiving module is used for receiving the processing data uploaded by the data aggregation module, processing the data andstoring and displaying the processed data; collected data is preprocessed through the data aggregation module, the data transmission amount and the transmission frequency can be reduced, and the datacan be more stably transmitted to the data receiving module. By arranging the storage unit on the data acquisition module, the probability of data leakage and loss can be reduced, and the security ofthe acquisition system can be improved.

The invention discloses a honeycomb wakeup mechanism-base dual-frequency WiFi module. The honeycomb wakeup mechanism-base dual-frequency WiFi module is characterized in that the honeycomb wakeup mechanism-base dual-frequency WiFi module includes a dual-frequency WiFi module and a 125khz wakeup device assembly which wakes up the dual-frequency WiFi module. When being in a low-power consumption sleep mode, the WiFi module of the invention can monitor 125khz low frequency, once a wireless radio frequency module enters an area covered by a 125khz antenna, the WiFi module can be wakened up and uploads the ID of the 125khz antenna through WiFi. According to the honeycomb wakeup mechanism-base dual-frequency WiFi module of the invention, a honeycomb type antenna is adopted as the wakeup device, and one wakeup device can cover a plurality of areas through a plurality of antennas, and each antenna has a unique ID number; and one set of innovative conflict detection and conflict prevention algorithm is adopted as the wakeup mechanism of the WiFi module, so that the WiFi module can interact with the wakeup device, and therefore, the plurality of antennas on one wakeup device can be supported, and the cost of a whole system can be reduced.

The invention discloses a hypersonic aircraft neural anti-interference control method based on a mixed event triggering mechanism, and relates to the technical field of aircraft automatic control. Themethod comprises the following steps: firstly, establishing a control description-oriented AHV parameterized kinematics / dynamics model; secondly, designing a minimum parameter learning neural networklearner with low computational complexity to eliminate the influence of various disturbances on the control system in real time; thirdly, constructing a mixed event triggering mechanism based on a relative triggering threshold value and an absolute triggering threshold value, effectively reducing the information communication traffic of the control loop on the premise of not sacrificing the tracking performance, and avoiding the defects that the triggering frequency is too frequent under a fixed triggering event and the control buffeting is caused by a larger control signal under the relativetriggering event; finally, integrating the MLP observer and the event trigger controller and realizing accurate tracking control over a given height / speed instruction. The method mainly solves the problem of AHV robust flight control under the influence of airborne computing resources and multi-source interference.

The invention discloses a building structure for a noise reduction construction site house, relating to the technical field of buildings. The building structure comprises a house frame and a house body, the house body is formed by assembling a plurality of wallboards, the wallboard is formed by splicing a plurality of sound insulation boards, installing grooves are formed in the upper end and thelower end of the house frame, accommodating cavities are formed in one ends of the sound insulation boards, inserting boards are arranged in the accommodating cavities in a sliding manner, one ends ofthe sound insulation boards are inserted into the installing groove in the lower end of the house frame, the other ends of the sound insulation boards are inserted into the installing groove in the upper end of the house frame through the inserting boards, and locking pieces are arranged in the accommodating cavities. Each sound insulation board comprises a base layer, a sound insulation layer and a decoration layer, the base layer is arranged on the side away from the indoor space and connected with the house frame, a sound insulation cavity is formed between the base layer and the decoration layer, penetrating holes communicating with the sound insulation cavity are formed in the base layer, the sound insulation layer comprises sound insulation blocks which are arranged in the sound insulation cavity at intervals and arranged in the length direction of the sound insulation cavity, and the plurality of sound insulation blocks are arranged corresponding to the penetrating holes respectively. The noise reduction effect of the construction site house is improved.

The invention discloses a WiFi communication system and a method thereof. The WiFi communication system includes a WiFi signal transmitter and a WiFi signal receiver. The WiFi signal transmitter is connected with a WiFi chip on a transmitting end and is used for performing frequency-hopping and underlocking treatment of initial WiFi radio frequency signals output by the WiFi chip on the transmitting end. And the WiFi signal receiver is connected with a WiFi chip on a receiving end and is used for receiving the WiFi signals after the frequency-hopping and underlocking treatment and output by the transmitter, restoring the WiFi signals after the frequency-hopping and underlocking treatment to the initial WiFi radio frequency signals and sending the initial WiFi radio frequency signals to the WiFi chip on the receiving end for processing. According to the invention, through the frequency-hopping and underlocking treatment of the WiFi signals, WiFi signal transmitting frequency is reduced and WiFi signal transmission range can be enlarged.

The invention provides an intrusion detection defense method and system based on a DoIP protocol. The method comprises the steps of arranging a DoIP protocol module in external test equipment, and arranging the DoIP protocol module and a DoIP intrusion detection module in an in-vehicle DoIP entity; setting a DoIP message format, a DoIP message scene and a DoIP message interval detection strategy in the in-vehicle DoIP entity; and when the external test equipment carries out diagnosis communication on the in-vehicle DoIP entity, enabling the in-vehicle DoIP entity to detect a DoIP message format, a DoIP message scene and a DoIP message interval in sequence according to the detection strategy. According to the invention, the DoIP intrusion detection module can firstly detect the DoIP message, identify abnormities such as the message header format, the message type, the message length, the message request interval, the message transport layer protocol type, the message request response interval and the like in different working scenes, filter abnormal illegal messages, and improve the security legality of the DoIP message.

An adaptive algorithm based battery-powered long distance wireless temperature and humidity sensor module. The sensor module uses an adaptive algorithm to transmit data on an event basis and / or a reduced basis to extend battery life to more than 10 years. It also uses a low power wireless transmitter which has frequency of sub-1 GHz and an effective transfer distance of up to 250 meters, a low power temperature and humidity sensor, and a long lasting lithium battery which has shelf life of 20 years.

Provided is a replacement necessity determination device for a snap-in valve having an inner end to which an air pressure detection device including an air pressure sensor and an acceleration sensor is coupled. A control device of the replacement necessity determination device is configured to predict an angle change amount of the snap-in valve and the air pressure detection device with respect to a wheel caused by a centrifugal force based on a rotational speed of the wheel and an acceleration detected by the acceleration sensor, calculate a degradation indication value of an elastic body of the snap-in valve based on a maximum value of the angle change amount during a period set in advance, and determine necessity of replacement of the snap-in valve based on an integrated value of the degradation indication value.

The present invention provides a head-mountable display device (100), comprising a processor (10) and a sensor (20); the sensor (20) comprises a transmitter (21) and a receiver (22); the transmitter (21) is used for sending a sensing signal at a preset transmission frequency, and the receiver (22) is used for receiving the sensing signal reflected back; the processor (10) is used for adjusting thetransmission frequency of the transmitter (21) according to an application currently being run by the head-mountable display device (100). In the head-mountable display device (100) and sensor (20) power conditioning method, it is possible to adjust the transmission frequency of the transmitter (21) according to a requirement, of a currently running application, of response speed with regard to achange in the wearing / removal state of the head-mountable display device (100), such that the transmission frequency of the transmitter (21) is reduced so that it satisfies the requirement, reducingenergy consumption.

The invention discloses a page data display method and device, a storage medium and an electronic device. The method comprises the following steps: caching page instance data at a client; and rendering the page instance data in the page view of the client according to the binding relationship between the page view and the page instance data. According to the invention, the technical problem of excessively high occupation of server resources in related technologies is solved.