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40results about How to "Time varying" patented technology
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Time domain radio transmission system
InactiveUSRE39759E1Conveniently frequency modulationEliminate the effects ofSecret communicationIndividually energised antenna arraysTime domainCommunications system
A time domain communications system wherein a broadband of time-spaced signals, essentially monocycle-like signals, are derived from applying stepped-in-amplitude signals to a broadband antenna, in this case, a reverse bicone antenna. When received, the thus transmitted signals are multiplied by a D.C. replica of each transmitted signal, and thereafter, they are, successively, short time and long time integrated to achieve detection.
Owner:TIME DOMAIN
3D time-of-flight camera and method
ActiveUS20120098935A1Effectively detectEffectively compensateElectromagnetic wave reradiationSteroscopic systemsPhase shiftedOriginal data
The present invention relates to a 3D time-of-flight camera for acquiring information about a scene, in particular for acquiring depth images of a scene, information about phase shifts of a scene or environmental information about the scene. The proposed camera particularly compensates motion artifacts by real-time identification of affected pixels and, preferably, corrects its data before actually calculating the desired scene-related information values from the raw data values obtained from radiation reflected by the scene.
Owner:SONY CORP
Method for predicting OD (Origin-Destination) passenger flow among bus stations on basis of IC (Integrated Circuit)-card record and device
ActiveCN102324128ATime-varyingImprove calculation accuracyChecking apparatusData centerGlobal Positioning System
The invention discloses a method for predicting the OD (Origin-Destination) passenger flow among bus stations on the basis of IC (Integrated Circuit)-card records and a device, which belong to the technical fields of urban public traffic planning, operation and management. The method comprises the following steps of: identifying passenger getting-on or getting-on and getting-off station information by utilizing a bus-mounted IC-card POS (Point Of Sale) machine and a GPS (Global Positioning System) positioning instrument, transmitting the passenger getting-on or getting-on and getting-off station information to a data center in real time to obtain time-variant passenger-flow data, and estimating the OD passenger flow by combining the characteristics of IC-card historical data and bus routes, and finally predicting the passenger-flow information in the next period of time. The method and the device are favorable to the effective utilization of urban intelligent bus data and the real-time dispatching of a bus system.
Owner:BEIJING JIAOTONG UNIV
Systems and methods of dynamically varying a pre-alarm time of a security system
Systems and methods of adjusting a pre-alarm time are provided, including detecting, by a sensor, an entry into a building by a person and generating detection data according to the detected entry. A processor communicatively coupled to the sensor adjusts a pre-alarm time according to the detection data. An alarm is output, by an alarm device communicatively coupled to at least the processor, according to the detection data and the adjusted pre-alarm time.
Owner:GOOGLE LLC
Boosting voltage levels applied to an access control line when accessing storage cells in a memory
A semiconductor memory storage device is disclosed, the memory comprises: a plurality of storage cells for storing data; at least two access control lines each for controlling access to a respective at least one of the plurality of storage cells; at least two access control circuits each for controlling a voltage level supplied to a corresponding one of the at least two access control lines in response to an access request, the at least two access control circuits each comprising a capacitor and switching circuitry; routing circuitry for routing the access request and a boost signal to a selected one of the at least two access control circuits in dependence upon an address associated with the access request; wherein the at least two access control circuits are each responsive to: receipt of the access request from the routing circuitry to connect the selected access control line to a supply voltage; and receipt of the boost signal from the routing circuitry to disconnect the supply voltage from the access control line and to couple the boost signal to the access control line through the capacitor of the access control circuit to provide a boost to a voltage level on the access control line.
Owner:ARM LTD
Speed control method in wireless streaming media transmission
InactiveCN102710374AImprove transmission qualityQuick changeError preventionNetwork traffic/resource managementPass rateBusiness data
The invention relates to wireless multimedia communication. In order to alleviate transmission quality shaking caused by an unreliable wireless channel when streaming media is transmitted in the wireless environment, further improve the transmission quality and increase the utilization ratio of the wireless channel. The technical scheme adopted by the invention is as follows: compared with a traditional speed control method, a speed control method in wireless streaming media transmission is characterized by comprising the following steps: obtaining the packet loss rate and business data passing rate parameters by smoothing treatment in a shorter interval; adjusting the streaming media transmission speed based on the parameters and an improved additive increase and multiplicative decrease algorithm, when the channel is in underload, determining the speed amplification by a variable constant additive factor and a constant additive factor determined by the packet loss, and when the channel is in overload, determining the speed reduction range by a variable constant multiplicative factor and a constant reductive factor determined by the packet loss; and setting a speed switching threshold, regarding the speed switching to be effective only when the difference between the current predicting speed and the previous predicting speed exceeds the set threshold. The speed control method in the wireless streaming media transmission is mainly applied to wireless multimedia communication.
Owner:TIANJIN UNIV
Semiconductor memory device allowing reduction in power consumption during standby
InactiveUS6301191B1Reduce power consumptionTime varyingPulse automatic controlDigital storageEngineeringControl circuit
A synchronous signal generating circuit 100 includes a delay circuit 110 which receives and delays an external clock signal Ext.CLK by a predetermined time for issuing the same, a phase comparator 120 which compares an output of the delay circuit 110 with a phase of the external clock signal Ext.CLK, a variable constant current source circuit 140 which varies in a digital manner a value of a constant current supplied to an output node 140a based on a result of comparison by the phase comparator 120, and a delay control circuit 150 which adjusts a degree of delay by the delay circuit 110 in accordance with the value of the constant current supplied to the output node 140a. The degree of delay by the delay circuit 110 is controlled in accordance with the value of the constant current which varies linearly in accordance with the result of phase comparison.
Owner:RENESAS ELECTRONICS CORP
Data transceiver with filtering and precoding
InactiveUS6879639B1Evenly goodRadio frequency interferenceError preventionSecret communicationDigital dataPrecoding
A method for conveying digital data from a transmitter to a receiver includes specifying a spectral filtering profile to be applied in conveying the data. A sequence of input symbols is generated at the transmitter, corresponding to the data to be conveyed. The input symbols are precoded at the transmitter using Tomlinson-Harashima preceding responsive to the specified profile, so as to generate a corresponding sequence of precoded symbols. The precoded symbols are filtered in accordance with the specified profile. The precoded and filtered symbols are decoded at the receiver so as to recover the data therefrom.
Owner:COMCAST CABLE COMM LLC
Dynamic information encrypting system and method
InactiveCN101043326AImprove information securityImprove securityMultiple keys/algorithms usageTime changesEncryption system
The invention relates to a dynamic information encryption system that includes input interface, encryption module which is used to generate the time changed cryptogram for the source information, output interface which is used to output the said cryptogram, and the said encryption module is connected between the input interface and the output interface. The invention also relates to a dynamic information encryption method: A1) the input interface receives the source information and sends the plaintext to the programmable encryption device; A2) the programmable encryption device receives the plaintext from the input interface, the commands from the encryption device and the time-effect information from the time marking device; A3) the programmable encryption device chooses the encryption algorithm according to the commands, and does the combined encryption for the plaintext, commands and the time-effect information; A4) the programmable encryption device sends the encryption files to the output interface. The dynamic information encryption system and method improves the security of original information input by the computer, and the cryptograph has bogus randomness, even if the cryptograph is intercepted and it can't be used.
Owner:赵兴 +1
Optical scanning with phase shifted beam
InactiveUS6144483AReduced bandingReduce twinningBeam/ray focussing/reflecting arrangementsMaterial analysis by optical meansPhase shiftedScan line
A beam scanning system for scanning an imaging surface includes a phase shifter for issuing phase signals, a radiation emitter for emitting a beam of radiation and a deflection element, such as an acousto-optic modulator or translating lens, for deflecting the radiation beam. Depending on the implementation, the emitter can be configured to phase shift the radiation beam and / or the deflection element can be configured to deflect the radiation beam in accordance with the issued phase signals. By emitting and / or deflecting the radiation beam in accordance with the phase signals, the length of the scan line formed on the imaging surface can be controlled. A deflector, such as a spin mirror or rotatable prism, is provided to direct the radiation beam to form a scan line on the imaging surface.
Owner:BINDING SOLUTIONS +1
Curl and profile correction with high velocity hoods
InactiveUS6094838AEliminate force which result in curlEliminate forceDryer sectionDrying machines with non-progressive movementsHigh velocityMoisture
A method and apparatus for correcting the curl in drying and dried paper is presented wherein high velocity hoods are used in combination with drying cylinders. In addition, the use of impingement drying hoods provide a means to correct for variations in the moisture profile of the paper. High velocity hoods can be located in the drying section of a paper machine to compensate for uneven drying by paper cylinders.
Owner:ASEA BROWN BOVERI INC
3D time-of-light camera and method
ActiveUS9194953B2Effectively detectEffectively compensateElectromagnetic wave reradiationSteroscopic systemsPhase shiftedOriginal data
Owner:SONY CORP
Windows-login-authentication-system method based on heart-sound authentication
InactiveCN107391994AGood removal effectLower barriers to useDigital data authenticationAuthentication systemSignal quality
The invention discloses a Windows-login-authentication-system method based on heart-sound authentication. The method includes the steps that heart-sound signals are extracted through an earphone, pre-emphasis processing is carried out, then noise passing through the heart-sound signals is removed with the wavelet de-noising method, and as heart sounds are single-cycle repeating signals, the heart-sound signals are subjected to data fusion, and the signal quality is improved. In the recognition stage, an independent wavelet extracting method based on data fusion is adopted, then a MFCC coefficient of reconstructed signals is extracted to serve as a characteristic value, an authentication method combined with the VQ algorithm and the DTW algorithm is designed, and the recognition accuracy rate is increased as far as possible. Login authentication of a PC is completed through a Winform login system.
Owner:SOUTHEAST UNIV
Liquid crystal display device and driving method thereof
InactiveUS20060164362A1Reducing a low-frequency soundReducing the low-frequency soundCathode-ray tube indicatorsCapacitanceLiquid-crystal display
Owner:SHARP KK
Clock switch device and microcontroller for selecting one of a plurality of clocks based on signal levels
ActiveUS7055051B2Avoid deadlockAvoid choicePulse automatic controlPulse train pattern monitoringMicrocontrollerControl register
The clock switch device of the present invention includes: a clock detector for receiving a plurality of clocks and clock selection data designating a clock to be selected, detecting whether or not the clock designated by the clock selection data among the plurality of clocks changes in signal level, and outputting the result as a detection signal; a control register for holding and outputting the clock selection data when the detection signal indicates that the clock designated by the clock selection data changes in signal level; and a selector for receiving the plurality of clocks and selecting a clock corresponding to the output of the control register among the plurality of clocks.
Owner:COLLABO INNOVATIONS INC
Systems and methods of dynamically varying a pre-alarm time of a security system
Systems and methods of adjusting a pre-alarm time are provided, including detecting, by a sensor, an entry into a building by a person and generating detection data according to the detected entry. A processor communicatively coupled to the sensor adjusts a pre-alarm time according to the detection data. An alarm is output, by an alarm device communicatively coupled to at least the processor, according to the detection data and the adjusted pre-alarm time.
Owner:GOOGLE LLC
Method and system for treating water inboard a vessel
A method and a system for treating water on board a vessel before discharging such water to the sea. The water to be treated is pumped through a primary heat exchanger (12) where the water is pre-heated and then through a secondary heat exchanger (13) where the water is further heated, the secondary heat exchanger (13) being heated by thermal fluid from a central heating system primarily heated by heat recovered from different type of heat generating equipment and also possibly by fuel and / or electricity in cases where the heat recovered from the heat generating systems is not sufficient to treat the water in a sufficient manner.
Owner:ULMATEC PYRO
Modeling and control method of temperature and humidity system based on closed space
The invention discloses a modeling and control method for a temperature and humidity system based on a closed space. The method comprises the following steps of S1, building a temperature and humidity system model of the closed space based on a mechanism analysis method and a step response system identification method; S2, designing a control system decoupler of the temperature and humidity system by using a feedforward compensation decoupling method; S3, designing a fuzzy adaptive PID control system of the temperature and humidity system based on fuzzy control and PID control; and S4, setting a fuzzy control rule MATLAB simulation and a control system Simulink simulation. According to the modeling and control method for the temperature and humidity system in the closed space, problems that a traditional PID algorithm is insufficient in anti-interference capacity and a conventional decoupling method is poor in effect are solved, and it is verified through experiments that the modeling and control method has the good effect on control precision and system stability of a temperature and humidity controller; and meanwhile, the anti-interference performance of the system is also improved.
Owner:中国人民解放军火箭军工程大学
Systems and methods of dynamically varying a pre-alarm time of a security system
Systems and methods of adjusting a pre-alarm time are provided, including detecting, by a sensor, an entry into a building by a person and generating detection data according to the detected entry. A processor communicatively coupled to the sensor adjusts a pre-alarm time according to the detection data. An alarm is output, by an alarm device communicatively coupled to at least the processor, according to the detection data and the adjusted pre-alarm time.
Owner:GOOGLE LLC
Pixel driving circuit, display substrate and driving method thereof, and display device
ActiveUS20180137814A1Time varyingStatic indicating devicesInput/output processes for data processingElectricityDriving current
The present disclosure provides a pixel driving circuit, a display substrate and a driving method thereof, and a display device. The pixel driving circuit includes a driving unit, a data voltage write unit, an energy storage unit, a threshold compensation unit, and a touch driving compensation unit. The energy storage unit comprises a first energy storage end and a second energy storage end. The touch driving compensation unit is connected to the second energy storage end of the energy storage unit to compensate the voltage of the second energy storage end in a touch phase, so as to maintain that driving current generated by the driving unit does not vary with time. The pixel driving circuit provided by the present disclosure can allow luminance of a driven electroluminescent element does not vary with time in a touch phase, thereby avoiding affecting light emission display of the driven electroluminescent element.
Owner:BOE TECH GRP CO LTD +1
Liquid crystal display device and driving method thereof
InactiveUS7453431B2Reducing a low-frequency soundReducing the low-frequency soundCathode-ray tube indicatorsCapacitanceLiquid-crystal display
Owner:SHARP KK
Liquid crystal display device and driving method thereof
InactiveUS7081876B2Reducing a low-frequency soundReducing the low-frequency soundCathode-ray tube indicatorsCapacitanceLiquid-crystal display
A TFT panel includes (i) a plurality of signal electrodes, (ii) a plurality of scanning electrodes which cross the plurality of signal electrodes, (iii) an active element provided in a vicinity of each intersection at which one of the plurality of signal electrodes and one of the plurality of scanning electrodes cross and connected to the one of the plurality of signal electrodes and the one of the plurality of scanning electrodes, (iv) a pixel electrode driven by the active element, and (v) a counter electrode to which an AC signal is applied, and which faces the pixel electrode. The REVC signal generating circuit generates a counter electrode generating signal, which is to be generated into a counter electrode driving signal by a counter electrode signal generating circuit, in synchronism with a horizontal synchronizing signal in such a manner that the polarity is inverted every horizontal period, and, when one polarity has a length of periods longer than the other polarity during one vertical period, the both polarities of the counter electrode have the same root-mean-square value of voltage during one vertical period by inverting the polarity having the longer period at any timing. With this, it is possible to reduce a low-frequency sound caused by piezoelectricity of a liquid crystal capacitance.
Owner:SHARP KK
A high-precision hydraulic synchronous lifting control system for wind power installation ships
The invention provides a high-accuracy hydraulic synchronous lifting control system of a wind installation vessel. The high-accuracy hydraulic synchronous lifting control system of the wind installation vessel comprises a hydraulic transmission module, a hydraulic control module and an electric control module. The hydraulic transmission module comprises a base, a spud leg and four hydraulic transmission assemblies, wherein the spud leg is fixed to the base, and a lug seat is arranged on the base. The hydraulic transmission assemblies comprise the left transmission assembly, the rear transmission assembly, the right transmission assembly and the front transmission assembly of the same structure. The hydraulic control module comprises a hydraulic oil tank, hydraulic pipelines, an air filter, a motor, a hydraulic pump, a check valve, an overflowing valve, four hydraulic transmission control assemblies and four hydraulic bolt control assemblies, wherein the hydraulic pump is connected with the motor; one end of the hydraulic pump is connected with the oil tank through the hydraulic pipeline and the air filter; and the other end of the hydraulic pump is connected with the hydraulic transmission control assemblies and the hydraulic bolt control assemblies through the hydraulic pipelines. The high-accuracy synchronous lifting control system of the wind installation vessel resolves the problem of leakage of a hydraulic system, non-linear friction resistance of execution components and the like, and has good application prospects.
Owner:COSCO SHIPPING SHIPYARD (NANGTONG) CO LTD +1
Dynamic information encrypting system and method
InactiveCN101043326BImprove securityTime-varyingMultiple keys/algorithms usagePlaintextComputer hardware
Owner:赵兴 +1
Multiple chaotic attractor time-sharing switching method and device for communication encryption
InactiveCN103684741AIncrease diversityTime-varyingSecuring communicationHandoff controlControl signal
The invention relates to a multiple chaotic attractor time-sharing switching method and device for communication encryption, belongs to the technical field of communication encryption and solves the problem that the existing multiple chaotic attractor switching software system is unavailable for fast time-sharing switching of different chaotic system attractors. A switching chaotic system is built in an FPGA; subsystem control characters are entered to a single-chip microcomputer through a soft keyboard; the single-chip microcomputer converts the subsystem control characters into subsystem switching control signals which are transmitted to the FPGA; the FPGA selects one subsystem of the switching chaotic system according to the subsystem switching control signals; split-phase control characters are entered to the single-chip microcomputer through the soft keyboard; the single-chip microcomputer converts the split-phase control characters into split-phase switching control signals which are transmitted to the FPGA; the FPGA selects two of three phases or four phases of the selected subsystem for outputting, according to the split-phase switching control signals. Time-varying, diverse and complex chaotic signals are provided. Encryption effect and decryption resistance are improved, and multiple chaotic attractors can be subjected to fast time-sharing switching anytime.
Owner:HARBIN UNIV OF SCI & TECH
Physical layer key extraction method, system and device, equipment and computer medium
PendingCN114040393ALower deployment costsIncrease effective channel detection valueSecurity arrangementReal-time computingReceiver
The invention discloses a physical layer key extraction method, system, device, equipment and a computer storage medium. The method comprises the steps of: determining channel information between a target antenna node and each receiver; randomly generating intelligent reflecting surface parameters of which the number is equal to that of receivers; based on the intelligent reflecting surface parameters and the channel information, pairing the intelligent reflecting surface parameters and the receivers one by one, obtaining a target pairing result; and based on the target pairing result, carrying out key extraction between the target antenna node and the receivers. The channel environment during key extraction is improved on the basis of the intelligent reflecting surfaces, so that the deployment cost is low; a static channel is artificially disturbed by using the random change of the intelligent reflecting surfaces, so that the correlation among multiple user channels is effectively eliminated while the channel time-varying property is increased, an effective channel detection value in the key extraction process can be increased, and the key extraction efficiency is improved; and the robustness is high. With the physical layer key extraction system and device and the computer medium adopted, corresponding technical problems can be solved.
Owner:NAT UNIV OF DEFENSE TECH
Process and arrangement for covering a flat blank with a cover
InactiveUS20070093371A1Increase angular velocityReduction of angular velocityBoxes/cartons making machineryBookbinding casesCardboardCycle time
Owner:MICHAEL HORAUF MASCHFAB
Breakdown spectrum and absorption spectrum combined measurement system and method
PendingCN111272736AGuaranteed reliabilityHigh sensitivityAnalysis by thermal excitationColor/spectral properties measurementsData acquisitionEngineering
The invention provides a breakdown spectrum and absorption spectrum combined measurement system and method. The system comprises a laser emission mechanism, a detection mechanism, a signal acquisitionmechanism and a computer, wherein the detection mechanism comprises an object placing table for bearing a detected object, a container arranged above the object placing table and an air pump communicated with the upper part of the container; the laser emission mechanism comprises a first laser emitting mechanism and a second laser emitting mechanism; the signal acquisition mechanism comprises a first signal acquisition mechanism and a second signal acquisition mechanism, the first signal acquisition mechanism comprises optical fibers arranged on the two sides of the object placing table and aspectrograph connected with the optical fibers, and the second signal acquisition mechanism comprises a photoelectric detector, a digital oscilloscope, a lock-in amplifier and a data acquisition card. According to the invention, comprehensive, accurate and high-precision measurement can be carried out on gas-solid-liquid three-state substances, the detection capability of the system is improved,and the reliability of a measurement result is ensured.
Owner:HEBEI UNIVERSITY
Two-stroke engine with variable scavenging port
Owner:HONDA MOTOR CO LTD
Pixel driving circuit, display substrate and driving method thereof, and display device
ActiveUS10068524B2Time varyingStatic indicating devicesInput/output processes for data processingDriving currentElectricity
The present disclosure provides a pixel driving circuit, a display substrate and a driving method thereof, and a display device. The pixel driving circuit includes a driving unit, a data voltage write unit, an energy storage unit, a threshold compensation unit, and a touch driving compensation unit. The energy storage unit comprises a first energy storage end and a second energy storage end. The touch driving compensation unit is connected to the second energy storage end of the energy storage unit to compensate the voltage of the second energy storage end in a touch phase, so as to maintain that driving current generated by the driving unit does not vary with time. The pixel driving circuit provided by the present disclosure can allow luminance of a driven electroluminescent element does not vary with time in a touch phase, thereby avoiding affecting light emission display of the driven electroluminescent element.
Owner:BOE TECH GRP CO LTD +1
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