Abstract: Disclosed is a cirrus image generation method that solves the problem that remote sensing image dehazing datasets are not real and the number of cirrus image features is limited. The present disclosure includes: Obtaining real cirrus images, preprocessing; using a forward process diffusion, constructing a Markov chain, and adding random noise gradually to the cirrus image of the cirrus image dataset. A training dataset is constructed according to the pure noise image and the corresponding real noise. Taking the pure noise image as the input and the corresponding noise as the output, a noise prediction model is established, and the training dataset is used for training, by inputting the randomly generated noise image into the trained noise prediction model, and combining the predicted noise with posterior probability to perform reverse denoising on the image. After a set number of denoising steps, a cirrus image is obtained with real cirrus features.

Abstract: A method of discovering process-based drivers in an event log table includes generating a number of process based features and joining them with the case table on the case ID obtaining a dataset, generating drivers, with each driver constraining another feature and attribute value, associating a driver score to each of the drivers, and retaining a set of drivers with the highest scores. The method then repeated extends each of the drivers of the set by one additional constraint and obtains drivers d?, associating a driver score with each driver d?. If the driver score is larger than the score of the driver prior to the extending step, d*, replacing d* by d?. The method retains the number of drivers d* with the highest scores as an updated set, repeats the step iteratively, and outputs the driver d* with the highest score out of the updated set.

Abstract: Disclosed herein are a method of controlling a bipolar high-voltage generator and an X-ray system. The bipolar high-voltage generator is connected to a load for supplying a cathode voltage and an anode voltage to the load. The bipolar high-voltage generator includes a first transformer and a second transformer. The first transformer is provided in an output circuit of the anode voltage, and the second transformer is provided in an output circuit of the cathode voltage. The method of controlling includes: obtaining a target voltage difference of the bipolar high-voltage generator, wherein the target voltage difference is within a preset range; and adjusting a working state of at least one of the first transformer and the second transformer based on the target voltage difference. The target voltage difference is defined as a difference between an absolute value of a target anode voltage and an absolute value of a target cathode voltage output from the bipolar high-voltage generator.

Abstract: A method may include obtaining a feedback or a reference value of a tube voltage applied to a radiation source of a radiation device for generating radiation rays. The method may also include determining, based on the feedback or the reference value of the tube voltage, a specific value of a focusing parameter associated with a focusing device of the radiation device. The method may further include causing the focusing device to shape a focus of the radiation rays according to the determined value of the focusing parameter. The focus of the radiation rays may satisfy an operational constraint under the specific value of the focusing parameter.

Abstract: The present disclosure relates to a high voltage generator including multiple high voltage generating modules configured to provide a total voltage. Each of the multiple high voltage generating modules may be configured to receive a driving pulse and generate a voltage component of the total voltage according to the driving pulse. The multiple high voltage generating modules may be in a series connection. Time points when the multiple high voltage generating modules receive driving pulses may be different, and waveforms of the driving pulses may be the same.

Abstract: Embodiments of the present disclosure provide an X-ray device and an imaging device including the X-ray device. The X-ray device may include a high voltage generator and an X-ray tube. The high voltage generator and the X-ray tube may be disposed in a same housing. The housing may be filled with an insulating material.

Abstract: The present disclosure discloses a wireless power transmission apparatus and an imaging device comprising the same. The wireless power transmission apparatus comprises: a first annular structure, provided with a first magnetic core assembly and a first framework, wherein the first magnetic core assembly is provided on a circumference of the first annular structure, the first framework is wound with a first winding, and the first winding passes through a window of the magnetic core in the first magnetic core assembly; and a second annular structure, provided with a second framework, wherein the second framework is wound with a second winding, and the second winding passes through the window of the magnetic core in the first magnetic core assembly; and the first winding is used for receiving an alternating voltage and transmitting the alternating voltage to the second winding.

Abstract: Systems and methods for improving output stability of an RFPA. The systems may obtain an initial radio frequency signal to be amplified by the RFPA. The systems may also generate a compensated radio frequency signal by performing, based on a preset compensation rule and a set of compensation parameters, a gain compensation operation for the initial radio frequency signal. The set of compensation parameters may include a supply voltage of the RFPA and a transistor junction temperature of the RFPA. The systems may further generate, by performing a non-linear correction operation on the compensated radio frequency signal, a corrected radio frequency signal, which is transmitted to the RFPA.

Abstract: Systems and methods for improving output stability of an RFPA. The systems may obtain an initial radio frequency signal to be amplified by the RFPA. The systems may also generate a compensated radio frequency signal by performing, based on a preset compensation rule and a set of compensation parameters, a gain compensation operation for the initial radio frequency signal. The set of compensation parameters may include a supply voltage of the RFPA and a transistor junction temperature of the RFPA. The systems may further generate, by performing a non-linear correction operation on the compensated radio frequency signal, a corrected radio frequency signal, which is transmitted to the RFPA.

Abstract: The present disclosure provides an arcing detection device. The arcing detection device may include a detection coil and a processing circuit operably connected to the detection coil. The detection coil may be configured to detect a current variation of a system. The processing circuit may be configured to determine information of an arcing event of the system based on the current variation of the system. The information of the arcing event of the system may include a position where the arcing event occurs in the system.

Abstract: The embodiments of the present disclosure provide a method and device for controlling a high-voltage generator, the method includes: obtaining a current output voltage and a target output voltage of the high voltage generator; determining an outer loop control parameter based on the current output voltage and the target output voltage; obtaining one or more internal physical parameters of the high voltage generator; determining one or more inner loop control parameters based on the one or more internal physical parameters and the outer loop control parameter; and determining a closed loop control parameter based on the one or more inner loop control parameters to control the high voltage generator.

Abstract: A method may include obtaining a feedback or a reference value of a tube voltage applied to a radiation source of a radiation device for generating radiation rays. The method may also include determining, based on the feedback or the reference value of the tube voltage, a specific value of a focusing parameter associated with a focusing device of the radiation device. The method may further include causing the focusing device to shape a focus of the radiation rays according to the determined value of the focusing parameter. The focus of the radiation rays may satisfy an operational constraint under the specific value of the focusing parameter.

Abstract: A high voltage generator is provided. The high voltage generator includes an inverter bridge including a first bridge leg and a second bridge leg, a first resonant branch coupled in series to the first bridge leg, a transformer coupled in series between the first resonant branch and the second bridge leg, a second resonant branch coupled in series with the transformer, and a rectifier circuit coupled with the transformer for providing an output voltage to an X-ray source.

Abstract: A method may include obtaining a feedback or a reference value of a tube voltage applied to a radiation source of a radiation device for generating radiation rays. The method may also include determining, based on the feedback or the reference value of the tube voltage, a specific value of a focusing parameter associated with a focusing device of the radiation device. The method may further include causing the focusing device to shape a focus of the radiation rays according to the determined value of the focusing parameter. The focus of the radiation rays may satisfy an operational constraint under the specific value of the focusing parameter.

Abstract: A high voltage generator is provided. The high voltage generator includes an inverter bridge including a first bridge leg and a second bridge leg, a first resonant branch coupled in series to the first bridge leg, a transformer coupled in series between the first resonant branch and the second bridge leg, a second resonant branch coupled in series with the transformer, and a rectifier circuit coupled with the transformer for providing an output voltage to an X-ray source.

Abstract: A high voltage generator is provided. The high voltage generator includes an inverter circuit coupled to receive a direct-current (DC) input voltage, a resonant circuit coupled to the inverter circuit, a transformer coupled to the resonant circuit and also coupled to provide a high voltage output to a high voltage device, and a phase control circuit coupled to receive a voltage across and a current through the resonant circuit and also coupled to the inverter circuit. The phase control circuit generates control signals to drive the inverter circuit. The control signals drive the inverter circuit to keep the resonant circuit operating in an inductive region.

Abstract: The present disclosure relates to a radio frequency power amplifier (RFPA) control device. The RFPA control device may include an input signal processing module configured to process an input signal into two signals. A first signal may be used for signal detection, and a second signal may be used for signal amplification. The RFPA control device may also include a delay module. The delay module may be disposed between the input signal processing module and an adjustment module. The delay module may be configured to determine a delay of the second signal such that the second signal and the control signal roughly simultaneously reach the adjustment module.

Abstract: Gradient power amplifier (GPA) systems and methods are provided. A GPA system may include a plurality of paralleled GPAs; and at least one controller operably coupled to the plurality of paralleled GPAs. The at least one controller may be configured to perform operations including: obtaining a total current parameter of the plurality of paralleled GPAs; determining, based on the total current parameter and a target current parameter, a first difference value; and determining, based on the first difference value, a first control parameter of a first GPA of the plurality of paralleled GPAs, wherein the first control parameter is configured to control an output current of the first GPA.

Abstract: Methods, computer systems, computer-storage media, and graphical user interfaces are provided for facilitating data transformations, according to embodiments of the present invention. In one embodiment, a plurality of remote sources is searched to identify candidate transformation tools relevant for performing data transformations. The candidate transformation tools are analyzed to identify tool examples corresponding with each of the candidate transformation tools. For each of the candidate transformation tools, the tool examples are stored in association with the corresponding candidate transformation tool. Based on a comparison of tool examples with example values, a transformation tool is identified as relevant to facilitate transforming example input values to the desired form in which to transform data.

Abstract: The present disclosure provides an arcing detection device. The arcing detection device may include a detection coil and a processing circuit operably connected to the detection coil. The detection coil may be configured to detect a current variation of a system. The processing circuit may be configured to determine information of an arcing event of the system based on the current variation of the system. The information of the arcing event of the system may include a position where the arcing event occurs in the system.