94results about How to "Inhibition of Accuracy Decrease" patented technology

A digital wireless communication apparatus includes a first modulator that modulates a pilot symbol according to a first modulation scheme, and a second modulator that modulates specific symbols according to a second modulation scheme, the second modulation scheme being different than the first modulation scheme. A third modulator modulates symbols other than the pilot symbol and the specific symbols according to a third modulation scheme, the third modulation scheme being different than the first and second modulation schemes. A timing controller controls timing such that the specific symbols are inserted immediately before and after the pilot symbol. The signal points of the specific symbols are allocated on an imaginary line that connects the origin point and a signal point of the pilot symbol on a signal space diagram.

A pressure sensor is realized wherein output error of sensor element can be reduced even in the case where the pressure sensor is utilized in high temperature conditions. A pressure sensor is provided with a housing 20, a diaphragm 24 that partitions the interior and the exterior of the housing 20, a sensor element 54 provided within the housing 20, output value of the sensor element 54 varying in accordance with force exerted thereupon, and a force transmitting rod 52 provided within the housing, the force transmitting rod 52 moving downwardly when a pressure is exerted upon the diaphragm 24, the force transmitting rod 52 thereby exerting force upon the sensor element 54. The diaphragm 24 has a central region 26 contacting with the force transmitting rod 52, and a surrounding region 27 surrounding the periphery of the central region 26 and connecting the central region 26 with the housing 20. The surrounding region 27, viewed cross-sectionally along the radius, is V-shaped or U-shaped, and cancels thermal expansion.

A blood pressure measuring apparatus to measure blood pressure based on a change in a pressure by a cuff mounted to a subject comprises: cuff pressure controlling means for deflating the cuff after avascularization by the cuff at a body part around which the cuff is placed; detecting means for detecting the change in a pressure by the cuff and outputting the detection as an electrical signal; extracting means for extracting a pulse wave signal from the electrical signal; and calculating means for calculating a systolic blood pressure value and a diastolic blood pressure value based on a relation between a change rate of an index value which is calculated by multiplying a maximum amplitude of each pulse of the pulse wave signal by the cuff pressure corresponding to the maximum amplitude and a predetermined value. The blood pressure measuring apparatus achieves a high-speed measurement while suppressing the reduction of accuracy.

The invention discloses a magnetic suspension rotor harmonic current suppression method based on SDMRC (second order dual mode repetitive control). Firstly, a magnetic suspension rotor dynamic model with mass unbalance and sensor harmonic waves is built. Secondly, the magnetic suspension rotor harmonic current suppression method based on SDMRC is adopted, wherein SDMRC belongs to high order RC, and frequency fluctuation robustness of a system can be effectively improved. SDMRC is of a dual mode structure, odd and even harmonic components can be independently suppressed, and response rapidity of the system can be improved. Besides, a fractional delay filter is added into the structure, and suppression precision of the system under a fixed sampling rate can be greatly improved. By the control method, slight rotation speed fluctuation robustness and the current suppression dynamic performance of the system and suppression precision of a rotor at an optional rotation speed can be improved.The harmonic components of magnetic bearing coil current in the magnetic suspension rotor can be suppressed, and the method is applicable to harmonic current suppression of the magnetic suspension rotor system with mass unbalance and the sensor harmonic waves.

An exposure method of drawing a pattern on a substrate using a charged particle beam. The method includes a detection step of placing a calibration substrate having a plurality of marks on a stage and detecting positions of the plurality of marks by a first position detection section using a charged particle beam and by a second position detection section using light while adjusting a position of the stage, and a correction step of correcting a position where the charged particle beam is incident on the substrate on which the pattern is to be drawn in drawing, in accordance with the position of the stage on the basis of the difference between detection results by the charged particle beam and the light in the detection step.

A three-dimensional image processing apparatus includes: an image capturing part for acquiring reflected light to capture a plurality of pattern projected images; a distance image generating part capable of generating a distance image based on the plurality of pattern projected images; a tone conversion part for tone-converting the distance image generated in the distance image generating part to a low-tone distance image that has a lower number of tones than the number of tones of the distance image and is obtained by replacing height information in the distance image with a shade value of the image; and a tone conversion condition automatic setting part for automatically setting, based on the height information in the distance image, a tone conversion parameter for prescribing a tone conversion condition at the time of tone-converting the distance image to the low-tone distance image in the tone conversion part.

A guide rail 13 is formed of a ceramic material having a specific strength of 2×107 mm or more and has a planar part with a surface roughness of 0.5 μmRa or less. Further, the guide rail 13 has a recess 18 for avoiding interference with a part to be attached in which the corner 18a of the recess 18 is formed with a radius of curvature of 0.1 mm or more.

A blood pressure measuring apparatus to measure blood pressure based on a change in a pressure by a cuff mounted to a subject comprises: cuff pressure controlling means for deflating the cuff after avascularization by the cuff at a body part around which the cuff is placed; detecting means for detecting the change in a pressure by the cuff and outputting the detection as an electrical signal; extracting means for extracting a pulse wave signal from the electrical signal; and calculating means for calculating a systolic blood pressure value and a diastolic blood pressure value based on a relation between a change rate of an index value which is calculated by multiplying a maximum amplitude of each pulse of the pulse wave signal by the cuff pressure corresponding to the maximum amplitude and a predetermined value. The blood pressure measuring apparatus achieves a high speed measurement while suppressing the reduction of accuracy.

Each of antenna system processors of a radar receiver generates, through correlation calculation of a reflection signal and a radar transmission signal, an array correlation signal for each delay in arrival of the reflection signal at each Doppler frequency. A static target candidate extractor extracts, on the basis of outputs of the antenna system processors and a Doppler frequency of a reflection signal from a static target located at a side of a moving body, array correlation signals corresponding to a candidate for the static target. A reference signal detector outputs a reference signal regarding the side of the moving body using, among the outputs of the static target candidate extractor, array correlation signals whose consistency is high. A correction value calculator calculates, using outputs of the reference signal detector, a correction value for correcting deviations between reception antennas included in an array antenna.

A feature point positioning apparatus positions a plurality of feature points for a predetermined pattern in image data. The apparatus selectively executes first candidate decision processing which decides position candidates of the feature points and second candidate decision processing which decides position candidates of the feature points at a higher processing speed than the first candidate decision processing in accordance with an operation mode, and executes, when the operation mode is a high-speed mode in which an operation is executed at a higher speed than a normal mode, the second candidate decision processing for more feature points than in the normal mode; and corrects the position candidates of the plurality of feature points obtained by the first candidate decision processing and the second candidate decision processing based on a layout relationship among the plurality of feature points.

An image processing apparatus includes a controller configured to perform: acquiring objective image data, the objective image data being generated by optically reading a manuscript and representing an objective image including a character image indicating a character; determining whether any condition, among conditions including first and second conditions, is satisfied; if the first condition is satisfied, transmitting, to a predetermined communication apparatus, first image data based on the objective image data, the first image data representing the objective image, receiving first processed data from the predetermined communication apparatus; and if the second condition is satisfied, executing, for the objective image data, a predetermined compression processing for reducing size of data representing the character image in the objective image data so as to generate second image data; transmitting the second image data to the predetermined communication apparatus; and receiving second processed data from the predetermined communication apparatus.

A gas sensor control apparatus including internal resistance detection means for detecting an internal resistance value of one of cells of a gas sensor, concentration detection means for detecting a concentration value of a specific gas component in a gas to be measured and outputting the detected concentration value, heater current supply control means for controlling a current to be supplied to a heater of the gas sensor such that the detected internal resistance value becomes a target value, determination means for determining whether or not the detected internal resistance value is within a permissible range including the target value, nullification information generation means for generating nullification information to nullify the detected concentration value, when it is determined that the target value is out of the permissible range, and nullification information output means for outputting the nullification information to an external device connected to the gas sensor control apparatus.

An image stabilization apparatus includes a first optical element configured to move in a direction different from an optical axis, a first driver including a first magnet magnetized in a first magnetized direction and a first coil and configured to drive the first optical element by an electromagnetic action, a second optical element configured to move in a direction different from the optical axis, and a second driver including a second magnet magnetized in a second magnetized direction and a second coil and configured to drive the second optical element by an electromagnetic action. The first magnet is disposed outside a second area onto which the second magnet is projected in the second magnetized direction and the second magnet is disposed outside a first area onto which the first magnet is projected in the first magnetized direction.