51results about How to "Correction coefficient" patented technology

An image synthesizing apparatus which generates, from plural images with differing resolutions and lighting conditions, a synthesized image in which the resolution of the original image is improved and the lighting conditions match those of the original image. The image synthesizing apparatus includes: a camera which acquires an original image and plural reference images, the reference images being obtained by capturing the same object shown in the original image under differing lighting conditions; a reference image conversion unit which converts the resolution of the acquired plural reference images to the same resolution as the original image; a coefficient calculation unit which calculates, based on the original image and plural reference images, which now have the same resolution, a conversion coefficient used in performing linear combination on the plural converted reference images and generating an original image; and an image synthesizing unit which generates plural converted reference images by converting the plural reference images to a target resolution, generates a linear-converted image by performing linear combination on the generated plural converted reference images using the conversion coefficient, and outputs, as a synthesized image, the generated linear-converted image or an image in which the adjusted linear-converted image has been adjusted.

An analog input signal obtained from an analog sensor group 104A and first and second calibration voltages obtained by high-precision voltage-dividing resistors are successively selected by a multiplexer, digitally converted through an AD converter and then input to a microprocessor. The microprocessor calculates a collinear approximate coefficient based on the first and second calibration voltages in cooperation with a program memory, and corrects the digital conversion value to the analog input signal by using the approximate coefficient, thereby correcting a linear error of the conversion characteristic of the AD converter. In the calculation of the approximate coefficient, upper and lower limit check is executed on measurement values and calculation coefficients, and also plural calculation results are averaged to enhance the precision.

A current control unit takes a deviation between a current command value and a current flowing through an inverter of a power conversion device, and controls the inverter based on the deviation. A harmonic sensing part receives input of an output current of an AC filter, and outputs a predetermined order harmonic of the input current in a direct current value form. A disturbance observer estimates the disturbance of the harmonic based on the output current and a coefficient defined as an inverse function of a transfer function from harmonic suppression current command value to filter output current detection value. A harmonic suppression control unit takes the deviation between the estimated harmonic disturbance and a disturbance command value that suppresses the disturbance, and calculates a harmonic suppression current command value. The harmonic suppression current command value is superimposed on the current command value of the current control unit.

A road surface frictional coefficient estimating apparatus has a device for determining a first estimated value of a yaw moment Mnsp_estm generated at an NSP of a vehicle due to the resultant force of road surface reaction forces acting on each wheel by using, for example, a frictional coefficient estimated value that has been determined, and a device for determining a second estimated value of a yaw moment Mnsp_sens generated at the NSP from the observed value of motional state amounts defining an inertial force moment at the NSP. The increasing/decreasing manipulated variable of the frictional coefficient estimated value is sequentially determined on an error (Mnsp_sens−Mnsp_estm) such that the error is converged to zero, and the road surface frictional coefficient is updated on the basis of the increasing/decreasing manipulated variable.

The disclosure relates to a system and method for identifying whether a difference between measured lambda and computed lambda, based on mass air flow and mass fuel flow, is due to a drift in fuel metering or a drift in air metering. The determination is based on also measuring exhaust gas NOx using a NOx sensor. By comparing the measured NOx to modeled NOx, drift can be attributed appropriately to the air flow measurement and/or the fuel flow measurement. Appropriate correction in the calibration can be undertaken to overcome sensor drift and/or drift in the fuel injector/fuel system flow characteristics.

In a calibration mode, an equilibrium period after pressurized gas is sealed in a device under inspection and a reference tank is divided into two periods; pressure-difference changes ΔP1 and ΔP2 are measured when a first-half equilibrium period of duration T1 elapses and when a second-half equilibrium period of duration T1 elapses, respectively; and a pressure-difference change ΔP3 generated in an inspection period of duration T2 is measured. A pressure-difference change CT2 generated for duration T2 from when a period of time in which the influence of an adiabatic change seems to become sufficiently stable elapses is measured. A drift correction coefficient K is calculated from these measured values using K=(ΔP3−CT2)/(ΔP1−ΔP2), is stored in a storage section, and is used in an inspection mode.

A control system for an internal combustion engine having at least one control device that affects an air-fuel ratio of an air-fuel mixture to be supplied to the engine, is disclosed. An air-fuel ratio correction coefficient is calculated for correcting an amount of fuel to be supplied to the engine so that the detected air-fuel ratio coincides with a target air-fuel ratio. An air-fuel ratio affecting parameter indicative of a degree of influence that an operation of the control device exercises upon the air-fuel ratio, is calculated. A correlation parameter which defines a correlation between the air-fuel ratio correction coefficient and the air-fuel ratio affecting parameter is calculated using a sequential statistical processing algorithm. A learning correction coefficient relating to a change in characteristics of the control device is calculated using the correlation parameter. The air-fuel ratio is controlled using the air-fuel ratio correction coefficient and the learning correction coefficient.

A D-class signal amplification circuit of the invention intends to repress the influence by a fluctuations of the power supply voltage with a simplified circuit construction and inexpensive components. The D-class signal amplification circuit includes: a multiplier that multiplies an input signal by a correction coefficient, a first modulator that executes a delta-sigma modulation to an output signal from the multiplier, a D-class amplifier supplied with a power supply voltage VDD, which amplifies an output signal from the first modulator, a voltage conversion circuit that generates a power supply voltage VDD/2 from the power supply voltage VDD, a first low pass filter that inputs a signal converted into a level of VDD/2 on the basis of the output signal outputted from the D-class amplifier, a reference signal generation circuit supplied with VDD/2, which generates a reference signal on the basis of the input signal, a second low pass filter that inputs the reference signal, a first comparator that compares levels of the signals outputted from the first with the second low pass filters, and a coefficient control circuit that increases or decreases the correction coefficient by a predetermined modifying breadth, on the basis of the comparison result.

In X-ray CT devices, degradation of quantitative determination ability for CT values resulting from the beam hardening (BH) effect of X-ray is prevented. X-ray absorption characteristic S obtained by simulation and a target value T thereof are saved beforehand, the simulation value S is revised by using projection data measured by maintenance measurement for obtaining basic data required for BH correction, and a BH correction coefficient is calculated by using the revised X-ray absorption characteristic S and the target value T. With a few actually measured values, BH correction accuracy can be improved, and reduction of incorrect diagnosis resulting from inhomogeneity of the CT values and improvement in the diagnostic ability based on improvement in quantitative determination ability for the CT values can be realized.

For blood or other physiological fluid sample collection kits that use filter paper to collect the sample the performance of the kit and associated analytical method can be improved by using a material having properties which are superior to those of standard filter paper or modified filter paper routinely used in standard biological assays. Certain materials currently available for uses other than blood collection, storage, or transport have properties that are advantageous as employed in assays of biological fluids, including the use of specific glass fiber blotting materials for collecting blood samples for hemoglobin or hemoglobin A1c monitoring.

Disclosed are a method and a system for updating a multi-frequency band pre-distortion coefficient lookup table, in order to solve the problems that the calculation complexity is high. Wherein, the method comprises: collecting a first frequency band reference signal and a first frequency band feedback signal, a second frequency band reference signal and a second frequency band feedback signal; calculating a first frequency band pie-distortion coefficient and a second frequency band pre-distortion coefficient; performing phase calibration on the first frequency band pre-distortion coefficient and the second frequency band pre-distortion coefficient, respectively; and updating a first lookup table according to the first frequency band pre-distortion coefficient performed the phase calibration, and updating a second lookup table according to the second frequency band pre-distortion coefficient performed the phase calibration.

A temperature detection circuit includes a first voltage source circuit to generate a first voltage having a temperature dependence by utilizing a work function difference of gate electrodes of a plurality of field effect transistors, a second voltage source circuit to generate a reference voltage having no temperature dependence by utilizing a work function difference of gate electrodes of a plurality of field effect transistors, a correction circuit configured to correct the reference voltage and output a corrected voltage, and a subtraction amplifier configured to subtract the corrected voltage from the first voltage, amplify a resulting subtracted voltage, and output a resulting amplified voltage as a correction voltage signal to adjust a temperature coefficient of the correction voltage signal.

The invention is an echo canceller for reducing the magnitude of an echo occurring in a return channel of a communication device and a method of implementing the same. The echo canceller includes a processing unit for generating an echo attenuated signal. The processing unit includes a first input, a second input and an output. The first input is for receiving a first signal that is the precursor of the echo. The second input is for receiving a second signal that potentially contains the echo. The output is for outputting the echo attenuated signal. The echo attenuated signal is derived by combining the second signal and an adaptation signal. The adaptation signal is generated by normalizing the echo attenuated signal to produce a normalized adaptation signal, and combining the normalized adaptation signal with the first signal to generate an intermediate signal. Additionally, the intermediate signal is de-normalized to produce the adaptation signal.

An ultrasonic diagnosis apparatus is provided. The ultrasonic diagnosis apparatus includes an ultrasonic probe configured to transmit ultrasonic push pulses to a biological tissue of a test object and further configured to transmit measuring ultrasonic pulses to the biological tissue subjected to the transmitted push pulses in order to measure an elasticity of the biological tissue, a respiration detection part configured to detect respiration of the test object, and a notification part which, based on the detection by the respiration detection part, is configured to give notification allowing a transmission timing of the push pulses to be recognized.

A method and an apparatus for determining validity of samples for a digital pre-distortion apparatus is disclosed. It is an object of at least one embodiment to provide a method and an apparatus for determining validity of samples for a digital pre-distortion apparatus that is configured to compensate for nonlinearity of a power amplifier in an efficient manner by accurately estimating a pre-distortion coefficient with a low-capacity memory.

An air-fuel ratio control apparatus that is applied to an internal combustion engine having an intake passage to which a canister is connected via an evaporative fuel supply passage, and an exhaust passage that is provided with an exhaust gas purifier, includes a first sensor provided upstream of the exhaust gas purifier, a second sensor provided downstream of the exhaust gas purifier, and a controller that corrects a fuel injection amount through feedback on a basis of the air-fuel ratio acquired by the first sensor, modifies a correction coefficient used for feedback correction on a basis of the air-fuel ratio acquired by the second sensor, and has a storage unit that stores the modified correction coefficient. The controller prohibits the modified correction coefficient from being stored into the storage unit if a concentration of fuel in purge gas is equal to or higher than a predetermined criterial concentration.

A subterranean environment evaluating apparatus and method, which measure, e.g., the geologic distribution coefficient in a subterranean environments using, e.g., a pit formed by boring. The subterranean environment evaluating apparatus comprises a geologic evaluation sensor, a pump, an analyzer, a PC, a data transmitter, etc., and it is disposed in the pit formed underground by boring. The geologic evaluation sensor is disposed to form a thin layer channel defined by the surface of a rock bed. Groundwater mixed with a tracer is caused to flow through the sensor, and the analyzer measures a change of tracer concentration in the groundwater between before and after contact of the groundwater with the rock bed. The PC determines a breakthrough curve from the change of tracer concentration, thereby calculating the distribution coefficient (Kd) between the rock bed and the groundwater and the effective diffusion coefficient of the rock bed.

In a delay regulating device, delay regulation is performed using a delay circuit performing delay regulation in a clock unit and a delay filter performing delay regulation in a tap unit smaller than the clock unit. The delay regulation is performed so as to obtain the maximum value of the correlation value and the minimum value of the error signal. First the delay circuit based on the clock unit is used to control the delay amount of the reference signal so as to obtain the maximum value of the correlation value. The delay filter is used to control the delay amount of the feedback signal so as to obtain the maximum value of the correlation value. Phase adjustment of the reference signal and the feedback signal is performed. The delay amount of the feedback signal is regulated so as to minimize the error signal unit using the delay filter.

A reference voltage generation circuit includes: a bandgap reference circuit, generating a plurality of initial currents with different temperature coefficients; a base voltage generation circuit, combining the initial current into a combined current, and converting the combined current into one or more base voltages; a bias current source circuit, generating one or more bias currents based on at least one of the initial currents; and one or more regulating output circuit, each converting a respective one of the one or more bias currents into an increment voltage and adding the increment voltage to the base voltage to generate a respective output voltage. Each output voltage may have its respective temperature coefficient.

There is provided an internal combustion engine control apparatus that can more accurately calculate a volume efficiency correction coefficient and can more accurately estimate the amount of air that flows into a cylinder and the external exhaust gas recirculation amount. In an internal combustion engine provided with an exhaust gas recirculation apparatus including an exhaust gas recirculation valve and an exhaust gas recirculation path, based on a cylinder flow rate, an exhaust gas recirculation amount, an inner-intake-pipe density, and an inner-intake-pipe density changing amount, a volume efficiency correction coefficient, as a volume efficiency corresponding value, is calculated; then, by use of the calculated volume efficiency correction coefficient, a cylinder intake air amount and a recirculation amount of exhaust gas that is taken into the cylinder are calculated.

Disclosed is an improved method and apparatus for estimating and applying a step size value for a least mean squares echo canceller. A power estimate of an excitation signal is compared to a reference power level to determine a shift adjustment. The shift adjustment is added to a reference shift amount to determine a shift amount. The product of an excitation signal and an error signal is then calculated and the product is stored in a memory register comprising a plurality of bits. The bits stored in the memory register are shifted either left or right based upon the shift amount. The shift adjustment may be based in part upon the ratio of the excitation signal power estimate and the reference power level.

It is assumed that there are a plurality of areas where a transfer is to be performed at a long pitch, in an original film, and a plurality of areas where a transfer is to be performed at a short pitch in each of the areas where a transfer is to be performed at a long pitch. On a sub-scan stage the original document is sub-scanned in the area where a transfer is to be performed at a short pitch, by performing at least one small step transferring, which is a transfer performed at a short pitch. Thereafter, a large step transferring which is a transfer performed at a long pitch, is performed on the sub-scan stage. The sub-scanning is repeated by performing the large step transferring and the small step transferring.

Provided are: a valve control device which is capable of reducing the difference between a set opening amount and the actual opening amount, when executing a partial valve stroke test; a valve control system; a method for calculating a valve control coefficient; and a valve control method. This shut-off valve control device is provided with a microcomputer for controlling the opening and closing of a solenoid valve which supplies air from an air supply source, to a cylinder of an air cylinder for controlling a valve shaft of a shut-off valve, and discharges said air. The microcomputer acquires a set opening amount of the shut-off valve. Furthermore, the microcomputer controls the solenoid valve to a value obtained by dividing the acquired set opening amount by a predetermined coefficient C.