摘要:
A semiconductor device has a semiconductor substrate; a shielding element formed by a conductor on a top side of the semiconductor substrate; an active element formed by a conductor and a semiconductor on the top side of the semiconductor substrate; a dielectric layer formed between the shielding element and the active element to electrically isolate the shielding element and the active element. The shielding element includes a first conductor layer formed as a flat plate, and a first external contact that is formed on the top side of the first conductor layer and is connected to the first conductor layer; and the active element includes a second conductor layer that is formed between the semiconductor substrate and the first conductor layer, and is connected to the semiconductor substrate.
摘要:
A frequency synthesizer device comprising a PLL circuit (9) and a frequency-division ratio control circuit (5). The PLL circuit (9) includes a phase comparator (1), a low-pass filter (2), a voltage-controlled oscillator (3), and a variable frequency divider (4). The frequency-division ratio control circuit (5) controls the variable frequency divider (4) such that a frequency division ratio of the variable frequency divider (4) is changed in time and a time average value of the frequency division ratio contains a value below a decimal point. Two different signals of an output signal fdiv of the variable frequency divider (4) and an output fdiv2 obtained via a delay element (10) are used as clocks of an accumulator portion (81) in the frequency-division ratio control circuit (5). The variation in the substrate potential and the variation in the power supply voltage generated by the operation of the frequency-division ratio control circuit (5) can be reduced, and the degradation of C/N of the frequency synthesizer can be suppressed.
摘要:
To provide an image reconstruction device capable of creating an image with image quality matching the operator's request when a cross-sectional image is reconstructed through a repeated calculation, the image reconstruction device which performs a repeated calculation on the basis of a difference between calculated projection data and measured projection data, the calculated projection data being obtained by performing a forward projection calculation on a reconstructed image which is reconstructed based on the measured projection data, includes an input section to which an image quality parameter which is considered to be important by an operator is input, a weight calculation section that calculates a weighting coefficient on the basis of the image quality parameter, and a repeated calculation section that performs a repeated calculation on the basis of a value obtained by weighting and adding a pixel value obtained in the previous iteration to a pixel value obtained from now using the weighting coefficient.
摘要:
With respect to projection data covering a plurality of sites, in order to create a medical image in which a uniform noise reduction effect is achieved for all sites within the projection data, an arithmetic device (5) determines one or more of proper subsets on the basis of scanning conditions and reconstruction conditions (step 2). Next, the arithmetic device (5) calculates a penalty-term weight for each proper subset on the basis of a detector output weight corresponding to a set element contained in the proper subset (step 3). Then, the arithmetic unit (5) performs an iterative approximation by using the penalty-term weight for each proper subset (step 4).
摘要:
In order to provide a reconstruction computing device, a reconstruction computing method, and an X-ray CT apparatus capable of improving the image quality while reducing the amount of computation when reconstructing an X-ray CT image using an iterative method, a reconstruction computing device 45 divides an initial image 50 reconstructed using an analytical method such as an FBP method into a bed region 51, an object region 52, and the other air region 53, sets reconstruction conditions including at least convergence conditions and a pixel size for each of the divided regions, updates estimation images by performing an iterative process, and fixes estimation images or forward projection data of a subset satisfying the convergence conditions until other subsets satisfy the convergence conditions.
摘要:
Image pickup is executed at an image pickup timing based on reference pulses by using, as a trigger, workpiece pulses which are output at an interval synchronized with a shape portion (projecting or recess portion) which is periodically and repetitively formed on a workpiece being rotated, and the image pickup is executed at the image pickup timing based on the reference pulses PA every time only reference pulses PA whose number corresponds to a pulse number between workpiece pulses are output from the image pickup timing concerned.
摘要:
In order to provide an X-ray CT apparatus and the like that reconstruct an image using an iterative approximation method which ensures stable convergence and can be executed at high speed, a computation device 5 of an X-ray CT apparatus 1 calculates matrices A, B, D, R, and R′ on the basis of the scanning conditions input through an input device 6 (step 1). Then, the computation device 5 calculates each element of a matrix I−α(SBTDA+βSR) (step 2). Then, the computation device 5 calculates the operator norm ∥I−α(SBTDA+βSR)∥ of the matrix I−α(SBTDA+βSR) (step 3). Then, the computation device 5 determines a relaxation coefficient α such that a predetermined conditional expression is satisfied (step 4).
摘要:
To provide a method for detecting a protein by immobilizing a protein on a protein array substrate at a high density with controlled orientation, irradiating the immobilized protein with ultraviolet light, visible light, or infrared light, and measuring the light not absorbed by the protein and further analyzing an interaction between the protein on the substrate and another protein and/or a compound other than proteins, a system used for the method, and to provide a protein array suitable for the system. A system including a protein array in which a protein is immobilized in aligned position on a light-transmissive substrate at a high density, a light-irradiating means, and a light-detecting means and being for detecting or analyzing a protein on the protein array and/or a compound which is other than proteins and interacts with the immobilized protein, wherein the protein array is irradiated with light by the light-irradiating means, and the light transmitted through the protein array is measured by the light-detecting means for detecting the light absorption of the protein on the protein array and/or the compound which is other than proteins and interacts with the immobilized protein.
摘要:
The present invention provides a method for effectively producing an optically active form of tetrasubstituted-5-azaspiro[2.4]heptane derivative, which serves as a useful production intermediate for quinolonecarboxylic acid antibacterial agents, and intermediates for the derivative. The present invention is directed to a method for producing a compound (VII) according to the following scheme.
摘要:
A plurality of voltage controlled oscillators and a plurality of dividers are provided corresponding to a plurality of frequency bands, respectively, and a phase comparator, a charge pump, and a low pass filter are used in common for the plurality of frequency bands. A switch which selects any one of the plurality of voltage controlled oscillators, and a switch which selects any one of the plurality of dividers are provided. A controller which performs a gain control of a frequency synthesizer loop is further provided so that a gain characteristic of the frequency synthesizer loop comprised of a selected voltage controlled oscillator, selected divider, phase comparator, charge pump, and low pass filter becomes constant regardless of a selection change of the plurality of voltage controlled oscillators and the plurality of dividers.