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

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.

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.

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.

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.

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 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 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.