摘要:
A control system for a refrigerant cooled variable frequency drive (VFD) for a chiller includes a controller which controls an electronic expansion valve to attempt to maintain a heat sink for the variable frequency drive within its design operating range. When the controller is unable to maintain the heat sink within its design operating range, a load on the chiller is reduced, either by reducing the frequency of the variable frequency drive, or if the chiller includes a compressor with internal guide vanes, by partially closing the guide vanes. The power rating of the VFD can thus be optimized based on its heat generating components operating at a controlled condition, unlike an air-cooled device which is dependent on the ambient environment.
摘要:
X-ray image data of an examination subject is acquired for an acquisition period by an X-ray detector of an X-ray system simultaneously with a decay process of a radioactive material taking place in or on the examination subject. The X-ray image data includes information relating to an X-ray attenuation distribution of the examination subject and information relating to the decay process. Correction image data representing the information relating to the decay process in the X-ray image data for the acquisition period is determined. Corrected X-ray image data for the acquisition period is generated using the X-ray image data and the correction image data.
摘要:
X-ray image data of an examination subject is acquired for an acquisition period by an X-ray detector of an X-ray system simultaneously with a decay process of a radioactive material taking place in or on the examination subject. The X-ray image data includes information relating to an X-ray attenuation distribution of the examination subject and information relating to the decay process. Correction image data representing the information relating to the decay process in the X-ray image data for the acquisition period is determined. Corrected X-ray image data for the acquisition period is generated using the X-ray image data and the correction image data.
摘要:
A method for processing an X-ray image of an object under examination taken with an X-ray detector with a plurality of pixel sensors is provided to remove bright-burn artifacts. At least one substantially artifact-free offset image of the X-ray detector without the application of X-rays is provided. At least one dark image with the X-ray detector without the application of X-rays is recorded. The at least one dark image is corrected by the at least one artifact-free offset image for determining at least one offset-corrected first correction image with afterglow artifacts. At least one second correction image for correcting bright-burn artifacts from the first correction image with afterglow artifacts is calculated using a, in particular predetermined, correlation between afterglow artifacts and bright-burn artifacts. At least one X-ray image of an object under examination is recorded with the X-ray detector, and the at least one X-ray image is corrected with the at least one second correction image to remove bright-burn artifacts.
摘要:
A shield for an electronic cartridge which has a pin that attaches a thermal element to a substrate. One edge of the substrate may have a plurality of conductive pads. The shield may have a base located adjacent to the conductive pads. The shield may include an arm which extends from the base and a finger which extends from the arm. The shield can be installed by sliding the arm toward the thermal element so that the pin engages and deflects the finger. The shield is moved toward the thermal element until the pin snaps into a notch located at the end of the finger. The finger may exert a spring force which pushes the base into the thermal element and secures the shield to the cartridge.
摘要:
An electronic cartridge which may include an integrated circuit package that is mounted to a substrate. The substrate may include a plurality of conductive pads that are inserted into an electrical connector. The cartridge may be guided into the connector by a guide rail which has a latch slot. The electronic cartridge may include a latch which extends from a cover that is coupled to the substrate. The latch may extend into the latch slot to secure the cartridge to the connector.
摘要:
An electronic cartridge that includes a pair of spring clips which attach a thermal element to an integrated circuit or an integrated circuit package. The integrated circuit/package is mounted to a substrate. The substrate may be a printed circuit board. The cartridge may have a plurality of pins that extend from the thermal element and through the substrate. Each spring clip may have a pair of bent portions that are attached to the pins of the thermal element. The spring clip exerts a pull force that pulls the thermal element into the integrated circuit/package. The bent ports can be deflected so that at least a minimum pull force is always exerted onto the thermal element even with dimensional variations in the parts of the cartridge. The bent portions can therefore accommodate for tolerances in the cartridge while clamping the thermal element to the integrated circuit/package.
摘要:
An X-ray detector of conventional design having photodiodes and scintillator material arranged thereon is able, given a suitable read-out frequency matching a low dose to which the flat-panel X-ray detector is subjected, to obtain images during each read-out operation, from which images the energy of individual X-ray quanta can be derived. An item of X-ray-spectrum information about pixels in a grid pattern can be obtained thereby.
摘要:
A sensor system is located in an environment composed of a first medium, where waves propagate with a first phase velocity, the sensor system including at least one main enclosure and a sensor array with at least two sensors, said sensor array being arranged inside the main enclosure, wherein the space inside the main enclosure between the sensor array and the inner surface of the main enclosure is filled with a second medium, in which waves propagate with a second phase velocity, the second phase velocity being different from the first velocity.
摘要:
The invention relates to a method for establishing fundamental frequency curves of a plurality of signal sources from a single-channel audio recording of a mix signal, said method including the following steps:a) establishing the spectrogram properties of the pitch states of individual signal sources with use of training data;b) establishing the probabilities of the fundamental frequency combinations of the signal sources contained in the mix signal by a combination of the properties established in a) by means of an interaction model; andc) tracking the fundamental frequency curves of the individual signal sources.