125 results about "Digital computation" patented technology

The invention provides a continuous blood pressure measuring device. The method for measuring blood pressure by the device comprises the following steps of: selecting features used for blood pressure equation estimation from a large number of extracted features by feature selection, sending the selected features into a decision system, and determining equations used for estimating the blood pressure from blood pressure simultaneous equations; selecting the features used for estimating coefficients of the blood pressure equations from the features which are extracted from feature extraction by feature selection, and estimating the coefficients of the blood pressure equations by statistical estimation, digital computation and other methods; and finally selecting the features used for estimating the blood pressure from the features which are extracted from the feature extraction by feature selection, and substituting the selected features into the blood pressure equations to estimate blood pressure. By a multi-feature-based pulse wave velocity method and a blood pressure simultaneous equation establishment method, the blood pressure estimation is performed by artificial intelligence, pattern recognition and other ways to ensure that not only the measurement accuracy of the blood pressure estimation is improved but also a complicated parameter calibrating process is avoided.

A method of data compression and transmission include splitting a wave function representative of an input data set into an arbitrarily oriented elliptical polarization state and a comparator wave function state, the comparator wave function state being transmitted to a detector. A quantum Fourier transform is performed on the arbitrarily oriented elliptical polarization state to yield a quantum computational product. A quantum Hadamard transform is performed on the quantum computational product to yield one of two possible quantum particle outputs. The input data set is reconstructed based upon the coincident arrival of the comparator wave function state and one of the two quantum particle outputs. A method is performed on either a quantum computer or a digital computer. An optical bench with appropriate electronics is particularly well suited to function as a quantum computer for the compression and transmission of data corresponding to sound.

In one embodiment, a user of a first portable digital computing device creates an annotation associated with a particular reading location within a reference document. The annotation and the reading location are shared with a second portable digital computing device storing a copy of the reference document. Using the shared information, the second device displays the reference document with the annotation shown at the reading location.

A coherent optical receiver of the invention combines local oscillator light having orthogonal polarization components in which the optical frequencies are different to each other, and received signal light, in an optical hybrid circuit, and then photoelectrically converts this in two differential photodetectors. Then this is converted to a digital signal in an AD conversion circuit, and computation processing is executed in a digital computing circuit using the digital signal, to estimate received data. At this time, the optical frequency difference between the orthogonal polarization components of the local oscillator light is set so as to be smaller than two times the signal light band width, and larger than a spectrum line width of the signal light source and the local oscillator light source. As a result, it is possible to realize a small size polarization independent coherent optical receiver that is capable of receiving high speed signal light.

A technique is provided for determining ownership interest allocation for a business, wherein transactions of contributors with the business are grouped into contributor transaction classes (CTCs), and a contribution value is calculated for the contributor transactions in each CTC to indicate the contribution of each transaction to the value of the business, using one or more performance metrics for each CTC, and lastly, at least one ownership interest award rule for a contributor is determined, based on the calculated contribution values for the CTCs. The technique can be performed with a digital computer and can provide real-time dynamic measures of ownership interest allocation.

The present invention performs a digital computation with a lower than worst-case-required clock period (i.e., a faster clock), and at the same time performs the same computation with a larger, worst-case-assumed, clock period (i.e., a slower clock) on a second system with identical hardware. The outputs from the computations are compared to determine if an error has occurred. If there is a difference in the two answers, the faster computation must be in error (i.e., a miscalculation has occurred), and the system uses the answer from the slower system. In one embodiment, the present invention utilizes two copies of the slower system that each run half as fast as the main system. However, the two copies produce results in the aggregate at the same rate as the main system, which is running at a much faster rate than possible without the invention. Hence the present invention improves performance (e.g., speed), albeit with more hardware. Advantageously, the present invention dynamically adapts to achieve the best performance possible under the actual operating conditions.

An offset error, an amplitude error, a phase error and a third harmonic component contained in two-phase sinusoidal signals are removed using relatively simple digital computations. An offset error contained in two-phase sinusoidal signals with a phase difference output from an encoder is detected and corrected. Then, an amplitude error contained in the offset-corrected two-phase sinusoidal signals is detected and corrected. Subsequently, a phase error contained in the amplitude-corrected two-phase sinusoidal signals is detected and corrected. Further, a third harmonic distortion contained in the phase-corrected two-phase sinusoidal signals is detected and corrected. Each correction step includes detecting an error from an ideal Lissajous waveform contained in the corrected two-phase sinusoidal signals, and adding the detected error to an accumulatively added last value to yield a new correction coefficient, thereby dynamically updating the correction coefficient.

An improvement in a networked digital computing system comprises an Information Resource Manager (IRM) operable to communicate with elements of the digital computing system to obtain performance information regarding operation of and resources available in the computing system, and to utilize this information to enable the IRM to adjust the application parameters relating to application execution, thereby to optimize execution of the at least one application program. The IRM comprises (1) a performance profiling system operable to communicate with the at least one CPU, network and SAN and to obtain therefrom performance information and configuration information, (2) an analytical performance model system, operable to communicate with the performance profiling system and to receive the performance information and configuration information and to utilize the performance information and configuration information to generate an analytical model output, the analytical model output comprising any of performance statistics and updated application parameters, and (3) an application parameter determination system, operable to communicate with the analytical model system, to receive therefrom the analytical model output, to determine, in response to the analytical model output, updated application parameter values, and to transmit the updated application parameter values to at least one application running on the digital computing system, for use by the application to set its application parameters, thereby to optimize execution of multiple applications running on the digital computing system, using updated runtime parameters.

An offset error, an amplitude error, a phase error and a third harmonic component contained in two-phase sinusoidal signals are removed using relatively simple digital computations. An offset error contained in two-phase sinusoidal signals with a phase difference output from an encoder is detected and corrected. Then, an amplitude error contained in the offset-corrected two-phase sinusoidal signals is detected and corrected. Subsequently, a phase error contained in the amplitude-corrected two-phase sinusoidal signals is detected and corrected. Further, a third harmonic distortion contained in the phase-corrected two-phase sinusoidal signals is detected and corrected. Each correction step includes detecting an error from an ideal Lissajous waveform contained in the corrected two-phase sinusoidal signals, and adding the detected error to an accumulatively added last value to yield a new correction coefficient, thereby dynamically updating the correction coefficient.

The disclosed systems and methods transform descriptive causal models into digital computer simulation models based on information obtained from crowdsourcing. This may include interviewing experts to collect descriptive information that is used to assemble causal descriptive models, which can be represented as graphs of nodes connected by edges. Node values may represent concepts and edge weights represent their causal relationships. Crowdsourcing is used to collect feedback about the causal descriptive models. The feedback is used to calculate edge weights that are incorporated into causal simulation models for use during model processing runs. A digital computer simulation is completed when node values reach steady states after model processing runs. A computer visualization tool can then be used to analyze outcome spaces produced by digital computer simulations. For example, digital computer simulations can generate decision spaces that are used to determine preferable courses of action in different situations.

The invention belongs to Video decoder IC design field. The character is in that: to the same operation among the prediction formulas in 17 different prediction modes of 4x4 block with 16 pixels adopting digit computation strength cut method to remove computation redundance; providing a in-frame predictor system with high degree of parallelism, which can process the predicted values of 16 pixels within every clock cycle. From the results achieved, compared to the design with the use of reconstruction, this invention can decrease circuit area under same parallelism and simplifies the control logic.

The invention provides a fast reflector electric control system for improving the pointing accuracy of a laser emission system, and relates to the field of fast reflector control. The fast reflector electric control system solves the problem that an existing control system cannot effectively improve the pointing accuracy of a laser emission system. The fast reflector electric control system comprises a main control computer, a servo controller connected with image processing software and an azimuth and elevation encoder in an infrared camera and a driver. The servo controller receives control instructions of the main control computer to execute corresponding actions, feeds tracking errors, positions and state data back to the main control computer, meanwhile receives data of the azimuth and elevation encoder to perform digital computation to output PWM signals, and receives image target-missing quantity data of the image processing software to control a fast reflector to perform real-time tracking. The driver is connected with the servo controller and an azimuth and elevation voice coil motor, amplifies the PWM signals to convert the PWM signals to be in a double-H-bridge PWM mode, and outputs motor control signals to control running of the motor. The fast reflector electric control system is high in control accuracy and easy to operate.

HEN2, which is a combination of signals in which at least one of two adjacent digits at any digit position of one or more digits of a 2-based three digit redundant binary number with one signal of three digits {n, o, p} each expressing value {-1, 0, 1} as a one-digit signal is a signal "o" expressing zero, is handled as one set of notation, not as a subset of the three digit redundant binary number.

The invention relates to a real time monitoring data-based mine tailing dam instability risk evaluating method and belongs to the technical field of special-purpose digital computation or data processing methods. The method helps overcome defects of technologies of prior art that cannot be applied to determining magnitude of dam slope instability risk, risk sources and the like. According to the real time monitoring data-based mine tailing dam instability risk evaluating method, based on a condition that monitoring data is obtained and a representative instability mode is determined; failure probability and slide area of all instability modes are used for determining instability risk thereof, mine tailing dam instability risk can therefore be quantified, mine tailing dam instability risk can be evaluated mostly based on the monitoring data, mode grouping is realized and the representative instability mode is selected according to correlation of anti-sliding stability safety factors of shallow-layer and deep-layer instability modes, and frequency and a glide plane of the representative instability mode which is regarded as an instability mode with maximum danger are used for evaluating risk in a quantified manner. The real time monitoring data-based mine tailing dam instability risk evaluating method is characterized by scientific property, visual property, reasonability and feasibility; scientific basis is provided for mine tailing dam operation safety management and risk control.

An improvement in a networked digital computing system comprises an Information Resource Manager (IRM) operable to communicate with elements of the digital computing system to obtain performance information regarding operation of and resources available in the computing system, and to utilize this information to enable the IRM to adjust the application parameters relating to application execution, thereby to optimize execution of the at least one application program.

The invention provides a transformer winding temperature measuring device based on a fluorescent fiber technique, which comprises a fiber temperature sensor, a photoelectric converter, a light source driving module, an amplifier module, a light source trigger module, a synchronous collecting AD converter, a master control CPU module and an IEC61850 communication protocol conversion module. The transformer winding temperature measuring device based on the fluorescent fiber technique has the advantages that: an ARM processor is used for generating a reference drive pulse, and meanwhile, a drive pulse and a reverse pulse of the ARM processor are used as reference signals, and high-speed synchronous sampling is utilized to collect the reference signals and fluorescent signal, and the delay between collecting channels is eliminated; the demodulation for the fluorescent signal is finished in the ARM processor, so that the analog circuits, such as an analog phase-locked loop, a filter, and the like, are omitted, the system complexity is greatly reduced and the reliability is greatly improved; and the digital computation is adopted, so that consistency of a collecting device is good.

The invention discloses a temperature-compensation-free current measurement method which uses modulation demodulation time division multiplexing technology, conducts modulation demodulation on sensing subcircuits of optical fiber sensing rings with two different temperature characteristics simultaneously, obtains measured values of the two sensing rings, and conducts digital computation according to temperature models of the two sensing rings to obtain the final measured value. The invention further discloses a device for achieving the method. The device comprises a light source, an optical fiber coupler, a two-channel phase modulator, a double refraction optical fiber delay line, the two sensing rings with different temperature characteristics, a detector and an electric signal demodulation unit, and two modulation channels of the two-channel phase modulator form two sensing subcircuits with the double refraction optical fiber delay line and one sensing ring. A temperature-compensation-free fiber optical current transformer and the method use test current demodulation values corresponding to two fiber rings with different temperature performances to calculate measurement current values without temperature influences, and accuracy, reliability and stability in a whole temperature scope are guaranteed.

The invention discloses a transform operation method, a transform operation device, a coordinate rotation digital computation method and a coordinate rotation digital computation device. A transform operation approximate evaluation method comprises the following steps: judging a type identifier of a function to be resolved, and searching for an iteration parameter corresponding to the type identifier; and according to the iteration parameter and the initial value of the function to be resolved, performing the iterative operation of the function to be resolved. In the invention, the corresponding iteration parameter is selected according to the preset type identifier; and when the methods and devices are used for resolving functions of different types, the configured and preset parameter of software are regulated, but the structure of hardware is not changed; one set of implementing resource is used to realize various computation types; and the implementation method is simple and normalized.

An embodiment of a method and a related apparatus for digital computation of a floating point complex multiply-add is provided. The method includes receiving an input addend, a first product, and a second product. The input addend, the first product and the second product each respectively has a mantissa and an exponent. The method includes shifting the mantissas of the two with smaller exponents of the input addend, the first product, and the second product to align together with the mantissa of the one with largest exponent of the input addend, the first product and the second product, and adding the aligned input addend, the aligned first product and the aligned second product.

The embodiment of the invention discloses an accumulation circuit for floating-point numbers and a realization method thereof, relating to the technical field of digital computation. The method comprises the following steps of: performing a negation operation, an exponent arithmetic operation, a symbol sum arithmetic operation, an exponent matching operation, a double-circuit accumulation operation, an addition operation, a symbol selection operation, a normalization operation, an overflow handling operation on at least two floating-point number signals, and outputting the accumulation result of the combination of the input signals. The accumulation circuit for floating-point numbers and the realization method for the same disclosed by the invention are suitable for floating-point number arithmetic.

A digital sigma-delta modulator requiring minimal die area and dissipating minimal power is formed with a plurality of integration stages coupled in tandem between an input node and an output node. The bit width of signals in the integration stages is progressively reduced from the first to the last integration stage without compromising modulator accuracy. A quantizer between the last integration stage and the output node provides the final reduction of signal bit width. The gain of the modulator feedforward and feedback paths are integer powers of two to further simplify the digital computation. In an exemplary implementation, three integration stages to form a third-order modulator are coupled in tandem between the input node and the output node. The gains of feedback and feedforward paths in one preferred embodiment are unity, and in some embodiments, one feedforward path has gain of 0.5.

A method and apparatus for simulating the characteristics of an analog tone control circuit using digital computation means. The desired analog tone control circuit is modeled using initial treble, middle, and bass settings, following which simulation software is used to generate the model's magnitude and phase responses versus frequency, extending over the desired frequency range. Gains, zeroes and poles are then chosen to produce magnitude and phase versus frequency response matching as closely as possible to that of the simulated circuit. A bilinear transformation is then performed to produce a digital filter prototype. Update equations responsive to treble, middle, and bass settings of the simulated tone control circuit are then designed in a specified form, providing for modification of the digital filter parameters as a function of updates in the treble, middle, and bass settings of the simulated tone control circuit.

A controller for an adjustable-frequency oscillator includes a first counter supplied with a stop-count value to count adjustable-frequency oscillator cycles divided by the ratio of desired frequency to reference oscillator frequency, to produce a stop signal when the first counter reaches the stop-count value. A second counter counts cycles of a reference oscillator starting from an initial number related to the stop-count value. The second counter stops counting and produces an end-count when the second counter receives the stop signal from the first counter. A resonant tank circuit includes a bank of capacitors with switches to select resonant tank circuit capacitors. The switches are selectively controlled using the end-count in the second counter. The stop-count value is set for the first counter so that the end count number in the second counter using a ones-complement binary format can be used to iteratively set the switches with minimal digital computation.

A computational method for implementation in an electronic digital processing system performs integer division upon very large (multi-word) operands. An approximated reciprocal of the divisor is obtained by extracting the two most significant words of the divisor, adding one to the extracted value and dividing from a power of two out to two significant words. Multiplying this reciprocal value by a remainder (initialized as the dividend) obtains a quotient value, which is then decremented by a random value. The randomized quotient is multiplied by the actual divisor, and decremented from the remainder. The quotient value is accumulated to obtain updated quotient values. This process is repeated over a fixed number of rounds related to the relative sizes in words of the dividend and divisor. Each round corrects approximation and randomization errors from a preceding round.

A portable radio system, a portable radio equipment to be used in the same and a frequency error prediction method can be adapted to large frequency error by making tap number smaller and frequency error smaller. The portable radio system employs an automatic frequency control for detecting a frequency shift of an internal oscillator of a portable radio equipment with reference to a received wave transmitted from a base station having higher precision of frequency and adjusting the frequency of the internal oscillator by feeding back the frequency shift to the internal oscillator. Coordinate rotation digital computation (CORDIC) is employed for calculation of arctangent in the automatic frequency control.

A graphics endowed, computer-based system, and an associated methodology, for performing diagnoses of medical problem-types. The system and methodology utilize (a) a digital computational engine, (b) a database operatively connected to the engine including a storage medium which contains medical-problem-type-related, anatomical, graphics data components, some of which have characteristics of non-normalization that are linked through relevance short-cutting to other components which have characteristics of normalization, and (c) a user-interactive, graphical interface including a display screen operatively connected both to the engine and to the database, operable under engine control to display selected ones of the mentioned graphics data components in both user-interactive sensitized-input, and user-informative-output, modes during medical problem-type diagnosis performed by the system.

Apparatus and method for generating signal gain coefficients for use in packet data communication between a single-input-single-output (SISO) transceiver and a single-input-multiple-output / multiple-input-single-output (SIMO / MISO) transceiver. Coordinate rotation digital computation (CORDIC) techniques are used to generate transmit channel coefficients which are substantially complementary to receive channel coefficients representing relative strengths of individual signals received via multiple spatially diverse antenna elements and corresponding to a wireless data signal originating from a particular SISO radio frequency (RF) transceiver. Using such transmit channel coefficients to produce outgoing RF signals for transmission via the same antenna elements and reception by such particular SISO RF transceiver provides for signal transmission and reception diversity.

Hardware and processes are provided for efficient interpretation of multi-value signals. The multi-value signals have a first voltage range with is used to indicate multiple numerical or logical values, and a second voltage range that is used to provide control functions. In one example, the multi-value circuitry is arranged as a set of rows and columns, which may be cascaded together. The control function can be implemented to cause portions of rows, columns, or cascaded connections to be powered off, thereby saving power and enabling more efficient operation.