58 results about "Sign changing" patented technology

One or more electronic signs each coupled to a transceiver or radio node that is communicably coupled to an access node may change its display, as directed by the access node. The access node is configured to receive data related to adjusting information displayed on one or more of the electronic signs. The access node wirelessly transmits an outbound communication to a number of radio nodes logically distributed around the access node. One or more of the radio nodes or may be configured without an electronic sign but instead be configured to repeat the outbound communication. A recipient radio node receives the outbound communication message and executes instructions contained in the outbound communication message so that its electronic sign changes the display of information, such as the price.

The invention discloses a remote home health care system. The home health care system comprises a fusion sorting subsystem used for receiving physical sign data parameters collected by a sensor in real time, conducting fusion sorting processing on the physical sign data parameters and diagnosing and feeding back the body condition of a user in real time according to physiological data and physiological models in a physiological model library, a resource optimization subsystem used for regularly optimizing the physiological data in a physiological database, generating an individualized physiological model for the user according to the historical physiological data in the physiological database, storing the physiological model in the physiological model library, and updating the physiological models in the physiological model library according to the latest physiological data in the physiological database and a comprehensive assessment subsystem used for predicting the physical sign change tread and the physical sign dynamic change range of the user according to the physiological data in the physiological database and the physiological models in the physiological model library and assessing the health of the user according to the physiological data and a predicating result.

The present invention provides methods and apparatuses for detection of a preamble portion of a data packet. A plurality of samples are received in an input signal. Samples that occur between consecutive sign changes in the received plurality of samples are counted. The counting of samples is performed a number of times to produce a sequence of counts of samples between consecutive sign changes in the received plurality of samples. Matched filtering of the sequence of counts of samples is performed to determine whether a preamble is detected. Bit rate and timing are initialized for data decoding based on parameters of the sequence of sample counts of a detected preamble.

A device for automatically detecting a calibration termination of a geomagnetic sensor includes a detection unit for detecting signals X and Y outputted from X-axis and Y-axis coils of the geomagnetic sensor, respectively, a calculation unit for calculating slopes dX/dt and dY/dt of the signals X and Y, respectively, and the number of sign changes N_x and N_y of the slope dX/dt of the signal X and the slope dY/dt of the signal Y, respectively, a display unit for displaying the calibration termination and a calibration progress state for the geomagnetic sensor, and a control unit for outputting a driving signal to the display unit to display a state of the calibration termination based on the slope dX/dt of the signal X and the slope dY/dt of the signal Y and the number of slope sign changes N_x and N_y.

The invention provides a assessment method of lithium battery health status, the method including: confirming the assessment factor of lithium battery health status, computing initial value of assessment factor weight value for the lithium battery health status and actual value of assessment factor weight value for the lithium battery health status, assessing the health status of lithium battery. This invention synthesizes the terminal voltage change rate, ohmic internal resistance and polarize internal resistance of lithium battery as the assessment factors which improving the assessment accuracy of lithium battery health status, using the method of measuring and computing terminal voltage change rate, ohmic internal resistance and polarize internal resistance of lithium battery after the pulse finishing discharging at the same time, so as to ensure the state identity and time consistency of lithium battery state measurement and improve the assessment factor accuracy of lithium battery health status, synthesizing the effect of standard deviation and average number indicators of assessment factor, and reflecting better overall sign changes of assessment factor in different levels, realizing the fast and precise measuring for lithium battery health status.

An alternation voltage- or current generator comprises a first switch driving output network whose frequency can be tuned. The tuneable network comprises a first Inductor that is coupled with a first capacitor. A second inductor and/or at least a second capacitor and/or at least a series circuit of a third inductor and a third capacitor which is coupled via at a second switch to the network. The second switch is controlled by a controlled delay (PWM) which is synchronized by a sign change of current and/or voltage in the network.

A communications device includes at least one memory device for storing complex exponential functions as approximations of sine and cosine basis waveforms. A logic circuit adds and subtracts the complex exponential functions to generate an Orthogonal Frequency Division Multiplexed (OFDM) communications signal as a plurality of N data subcarriers that carry communications data. The logic circuit provides efficient and accurate implementation of the IFFT for use as an OFDM modulator using additions of stored complex exponentials and modulation of the integer-valued QAM data symbols using logic shifts and sign changes (2's complement).

A clothes drying appliance has a moisture sensor and a signal acceleration processor coupled to receive and monitor a moisture signal from the moisture sensor. The processor determines signal gradients in the moisture signal and detects either minimums or maximums in the moisture signal when a sign change occurs between two successive signal gradients. The processor uses the detected local minimum or maximum information and the gradient preceding the detected local minimum or maximum to extrapolate a predicted moisture signal value for the clothing articles. The generation of the predicted moisture signal compensates for sensor response time.

A frequency synthesizer is described. In particular, the frequency synthesizer includes a modulator circuit for producing a signal of modulated frequency. The frequency synthesizer includes an accumulator for summing a plurality of errors in the modulator circuit. An error sum value is generated. More particularly, the accumulator increases the rate of sign change of the plurality of errors. An error signal modulator is coupled to the accumulator and modulates an index that is associated with a current error based on the error sum value. The index that is modulated is used for selecting a feedback loop divider count value used for dividing a frequency of the signal. As a result, the error noise around a target signal shows an increased sign change of error, which moves the error noise to higher frequencies. This improves EMI performance.

A method of GPS bit synchronization is disclosed. The method includes the steps of a) receiving plural serial C/A Codes, wherein a data bit is formed by m C/A Codes; b) sequentially providing a bin number ranged from 0 to m−1 to the plural C/A Codes; c) setting a sampling value k; d) sequentially determining adjacent two C/A Codes, C/A Code nk and C/A Code (n+1)k, wherein n={0, 1, 2, 3, . . . }, and calculating a sign change aggregate value of each bin number ranged from 0 to m−1; e) repeating step d) till there are k bin numbers having the sign change aggregate value equal to or greater than a first threshold, and summing the k bin numbers for obtaining a lookup value; and f) acquiring a bit boundary of the data bit according to the lookup value in the plural serial C/A Codes.

Disclosed is frequency error detection apparatus and method based on histogram information of an input signal. The apparatus includes an analog-to-digital (A/D) converter for sampling and converting an analog signal inputted to an electronic device into digital values; a zero crossing point detector for detecting sign changes of the digital values, and detecting zero crossing points; a period information detector for detecting period information which is the number of the digital values corresponding to a periodic signal; a histogram information calculator for counting the number of detections for the respective period information based on the period information, and calculating error-detection-target histogram information; and a frequency error calculator for detecting a difference between the error-detection-target histogram information and a reference histogram information, and calculating a frequency error value based on the difference. The present invention can shorten time necessary for frequency error detections and improve accuracy of the detected frequency error value.

The invention provides an adaptive iterative receiver in a low-density parity check code and continuous phase modulation system. The adaptive iterative receiver comprises a receiving antenna (8), a CPM (continuous phase modulation) demodulator (9), a CPM soft-input and soft-output module (10), a random deinterleaver (11), a weighted processing module (12), an LDPC (low density parity check) code soft-input and soft-output module (13), a random interleaver (2), a sign change rate judging module (14), a switching circuit (15) and a bit decision device (16). The weighted processing module (12) and the sign change rate judging module (14) are introduced and used together. Iterative times are adaptively set by the receiver according to change conditions of a Rayleigh fading channel, an iterative process is prevented from entering a positive feedback state, iterative detection is automatically stopped at a position with a small bit error rate, average iterative times are reduced, iterative detection time is saved, and convergence, reliability and instantaneity of a system are improved. In addition, the adaptive iterative receiver has the advantages of reliable performance, low complexity, easiness in maintenance and the like, and has popularization and application values in satellite communication, deep space communication and the like.

The invention relates to a pet fish physical sign quality regulation and control method comprising the following steps: 1, determining pet fish physical sign indexes, and quantifying the indexes; 2, collecting water quality factor data and forming k-dimension vectors; 3, measuring a changing value [delta] q of the pet fish physical sign index of each vector set under specific water quality environment and specific time range; 4, measuring the time length TL of a physical sign index changing period; 5, presetting a physical sign index changing value delta Q or Q value, selecting [delta] q measured under different water quality environment in the step 3 for accumulation (repeatedly or partially selected) until the delta Q value or the Q value is reached, thus obtaining a physical sign index changing model; 6, determining corresponding water quality environment conditions according to the model obtained by the step5, and using the conditions to regulator and control the water quality. The method can improve the pet fish physical sign quality, can effectively analyze, identify and regulate and control pet fish physical sign changes, thus improving and enhancing pet fish cultivation benefits.

A timing lock detection apparatus and method for digital broadcasting receiver are provided. The apparatus includes: a discrete value generator for cyclically selecting a discrete signal value from a continuous timing error signal; a differential calculator for obtaining a difference between the currently selected timing error signal value and a previously selected timing error signal that is a timing jitter signal; a sign variation detector for detecting variation in a sign of the timing jitter signal; a lock control signal generator for discriminating a period based on the detected sign changing time, and controlling a lock step of the loop filter according to a convergence mode of the timing jitter signal at each period; and a lock detection signal generator for generating a lock signal or an unlock signal according to whether the timing jitter signal reaches a steady state and using the current lock step signal.

The invention discloses an electronic positioning wristband for living body wearing through cooperation with a base station network. The electronic positioning wristband comprises a wristband main body portion and a watch. The watch comprises an active label, a passive label, a dismounting prevention and sign monitoring circuit, and a battery, wherein the passive label and the dismounting prevention and sign monitoring circuit which are respectively connected with the active label, the battery is connected with and supplies power to the active label and the dismounting prevention and sign monitoring circuit, the active label is used for receiving an activation instruction sent by a base station for activating the active label, the dismounting prevention and sign monitoring circuit is used for monitoring the dismounting of the wristband main body portion and the sign change of a living body and activating the active label, the activate label, after being activated, emits a wireless signal carrying the information of the electronic positioning wristband to the base station, and the base station, according to different signal intensity, performs positioning operation, calculates a position and uploads content to a management position for further processing. The electronic positioning wristband realizes information recording, and integrates multiple functions such as dismounting prevention, living sign monitoring and the like at the time of precision positioning.

The invention discloses an airborne electronic countermeasure visual simulation training system based on AR and AI. The system is used for acquiring the physical sign change and the training result ofa trainee according to airborne electronic countermeasure visual simulation training and adjusting the picture parameters of man-machine interaction according to the physical sign change. The systemcomprises a model construction module, a visual simulation module, a simulation training module, a man-machine interaction module, a parameter adjustment module, a data acquisition module, a processor, a database, a training analysis module, a training formulation module and an evaluation module. The simulation training system acquires a physical sign value TZi of the trainee by using a formula TZi= SA* J1+ SA* J2+ SB* J3, and the larger the physical sign value TZi is, the larger the change amplitude of the heart rate respiratory frequency Bi and the blood pressure Ci of the trainee is; and atraining result value Ki is obtained by using the formula, and the brightness, the resolution and the steering degree of a display unit in the man-machine interaction module are adjusted through the parameter adjusting module.