Abstract: The present invention relates to a method for controlling switching of an electrical system comprising at least one frequency-controlled switch arm, said method comprising the following steps: closing a first top or bottom switch, implementing a predetermined downtime and opening a second switch, for a period corresponding to the control frequency, and then: opening the first switch, comparing the voltage measured at the midpoint with a voltage threshold, determining a second instant t2 at which the voltage measured at the midpoint crosses the voltage threshold, closing the second switch at said second instant t2, calculating a downtime DT adjusted according to the formula: (I) wherein Fsw is the control frequency, said adjusted downtime being implemented as of the subsequent switching.

Abstract: The present disclosure is related to systems and methods for motion signal recalibration. The method includes obtaining a motion signal of a subject based on positron emission tomography (PET) data of the subject. The motion signal may represent a plurality of motion cycles. The method includes determining a distribution of the motion cycles. The distribution of the motion cycles may indicate a probability that each motion cycle of the plurality of motion cycles corresponds to an actual motion cycle. The method includes correcting the motion cycles of the motion signal based on the distribution of the motion cycles to obtain corrected motion cycles. The method includes reconstructing a PET image by gating the PET data based on the corrected motion cycles.

Abstract: A method include obtaining at least one first PET image of a subject acquired by a PET scanner and at least one first MR image of the subject acquired by an MR scanner. The method may also include obtaining a target neural network model. The target neural network model may provide a mapping relationship between PET images, MR images, and corresponding attenuation correction data, and output attenuation correction data associated with a specific PET image of the PET images. The method may further include generating first attenuation correction data corresponding to the subject using the target neural network model based on the at least one first PET image and the at least one first MR image of the subject, and determining a target PET image of the subject based on the first attenuation correction data corresponding to the subject.

Abstract: A method for fabricating a semiconductor device that includes forming a mask stack over a semiconductor structure. The mask stack has a first mask layer and a second mask layer, where the second mask layer is arranged between the first mask layer and the semiconductor structure. The method further includes patterning a first pattern in the mask stack. The first pattern includes a first opening having first sidewalls formed in the first mask layer, a second opening having second sidewalls formed in the second mask layer, and a third opening having third sidewalls formed in the semiconductor structure. The first, second, and third sidewalls of the respective openings of the first pattern are formed around a central axis, where the second sidewalls of the second opening are located further away from the central axis than both the first and third sidewalls of the first and third openings, respectively.

Abstract: A method of forming an polymer composites is disclosed herein that includes infiltrating CNT sponges with a polymer or metal to form a composite. The method uses a relatively easy, scalable, and low-cost synthesis process that makes the composites attractive as TIM. CNTs in the sponge structure are covalently bonded, resulting in a low Young's modulus while at the same time maintaining a good thermal conductivity. This strategy makes it possible to obtain both high deformability and high thermal conductivity, which are difficult to have simultaneously due to their adverse correlation.

Abstract: One embodiment of the present invention sets forth a technique for connecting users based on a measure of correlation. The method involves receiving a first activity data element associated with a first user, where the first activity data element includes activity information related to a first software application, receiving a second activity data element associated with a second user, where the second activity data element includes activity information related to the first software application, and determining, via a processing unit, a measure of correlation between the first and second activity data elements. The method further involves determining, based on the measure of correlation between the first and second activity data elements, that a connection between the first user and the second user should be facilitated, and facilitating a connection between the first user and the second user.

Abstract: Embodiments of the present disclosure provide a method for forming a hole structure in a semiconductor device. The method for forming a hole structure having a first hole portion and a second hole portion connected to and over the first portion in a stack structure of a semiconductor device includes determining a hard mask layer. An etching resistivity of the hard mask layer may be inversely proportional to a difference between a first lateral dimension of the first hole portion and a second lateral dimension of the second hole portion, and the first lateral dimension may be less than the second lateral dimension. The method may also include forming the hard mask layer over the stack structure, and patterning the hard mask layer to form a first patterned hard mask layer that has a first mask opening. The first mask opening may have the first lateral dimension.

Abstract: Embodiments of the claimed invention are directed to a device, comprising: an anode that includes a lithiated silicon-based or lithiated carbon-based material or pure lithium metal or metal oxides and a sandwich-type sulfur-based cathode, wherein the anode and the cathode are designed to have porous structures. An additional embodiment of the invention is directed to a scalable method of manufacturing sandwich-type Li—S batteries at a significantly reduced cost compared to traditional methods. An additional embodiment is directed to the use of exfolidated CNT sponges for enlarging the percentage of sulfur in the cathode to have large energy density.

Abstract: A method include obtaining at least one first PET image of a subject acquired by a PET scanner and at least one first MR image of the subject acquired by an MR scanner. The method may also include obtaining a target neural network model. The target neural network model may provide a mapping relationship between PET images, MR images, and corresponding attenuation correction data, and output attenuation correction data associated with a specific PET image of the PET images. The method may further include generating first attenuation correction data corresponding to the subject using the target neural network model based on the at least one first PET image and the at least one first MR image of the subject, and determining a target PET image of the subject based on the first attenuation correction data corresponding to the subject.

Abstract: An electric system to charge a battery on a vehicle provides for a three-phase alternating-direct converter comprising input terminals connected to an outside power grid, a high output terminal and a low output terminal, a direct-direct converter made up of two direct-direct converter circuits, a first converter circuit having a high input terminal connected to the high output terminal of the alternating-direct converter and a second converter circuit having a low input terminal connected to the low output terminal of the alternating-direct converter, the low input terminal of the first direct-direct converter circuit being connected to the high input terminal of the second direct-direct converter circuit, and the high output terminal of the first converter circuit being connected to the high output terminal of the second converter circuit and the low output terminal of the first converter circuit being connected to the low output terminal of the second converter circuit.

Abstract: The subject-matter of the present invention is an electrical system, comprising: a resonant DC-DC voltage converter notably comprising two resonant capacitors, a control unit comprising: a first module for determining a maximum value and a minimum value of the voltage at the terminals of each resonant capacitor as a function of an output voltage of the converter, a module for comparing between said maximum value, respectively minimum value, of the voltage at the terminals of each resonant capacitor and an upper voltage limit, respectively a lower voltage limit, corresponding to said output voltage, a failure detection element configured to detect a failure of the converter if: said maximum value is greater than or equal to the upper voltage limit, or said minimum value is less than or equal to the lower voltage limit.

Abstract: The present disclosure relates to a method and system for registering multi-modality images. The method may include: acquiring a first image relating to one or more reference objects; acquiring a second image relating to the one or more reference objects; determining a set of reference points based on the one or more reference objects; determining a set of mapping data corresponding to the set of reference points in the first image and the second image; and determining one or more registration parameters by comparing a plurality of back-projection errors generated in a plurality of iterations that are performed based on the set of mapping data.

Abstract: A method for fabricating a semiconductor device that includes forming a mask stack over a semiconductor structure. The mask stack has a first mask layer and a second mask layer, where the second mask layer is arranged between the first mask layer and the semiconductor structure. The method further includes patterning a first pattern in the mask stack. The first pattern includes a first opening having first sidewalls formed in the first mask layer, a second opening having second sidewalls formed in the second mask layer, and a third opening having third sidewalls formed in the semiconductor structure. The first, second, and third sidewalls of the respective openings of the first pattern are formed around a central axis, where the second sidewalls of the second opening are located further away from the central axis than both the first and third sidewalls of the first and third openings, respectively.

Abstract: The present invention relates to an electrical transformer comprising a magnetic core and a primary coil, forming a primary circuit, and a secondary coil, forming a secondary circuit, electrical transformer configured such that: a first inductance value L1so measured on the primary circuit with the secondary circuit open, a second inductance value L1ss measured on the primary circuit with the secondary circuit short-circuited, and a third inductance value L2po measured on the secondary circuit with the primary circuit open, are such that: L 2 ? P ? O - 1 n 2 ? L M < A · ( L 1 ? SO - L M ) with LM=?{square root over ((L1SO?L1SS)×L1SO·N2)} where A is a real number greater than 10.

Abstract: The present disclosure is related to systems and methods for reconstructing a positron emission tomography (PET) image. The method includes obtaining PET data of a subject. The PET data may correspond to a plurality of voxels in a reconstructed image domain. The method includes obtaining a motion signal of the subject. The method includes obtaining motion amplitude data. The motion amplitude data may indicate a motion range for each voxel of the plurality of voxels. The method includes determining gating data based at least in part on the motion amplitude data. The gating data may include useful percentage counts each of which corresponds to at least one voxel of the plurality of voxels. The method includes gating the PET data based on the gating data and the motion signal. The method includes reconstructing a PET image of the subject based on the gated PET data.

Abstract: Described is a method for predicting multiple components' content in a case that rare earth ions with and without color feature coexist, and relates to component content prediction in rare earth extraction process. It is difficult to quickly accurately detect component's content in rare earth extraction process. Because of relatively large difference between images' color features of CePr/Nd mixed solution with colorless Ce ions and Pr/Nd solution, detecting content method of single rare earth element based on color feature is no longer applicable.

Abstract: Content determination, in an online collaboration environment, moved from each client to a server, where the server reviews signal characteristics to determine the content in the data stream, may be provided. First, an online collaboration server receives a data stream associated with an online collaboration session. A traffic analyzer at the frontend of the server analyzes the data stream to determine a signal characteristic. Based on the signal characteristic, the traffic analyzer generates a classification of a type of content in the data stream. This classification is sent to an online collaboration application at the client. The client can then adjust the encoding of the data based on the type of content in the data stream.

Abstract: The purpose of the present invention is an electrical system allowing conversion of a direct voltage into another direct voltage, including: a resonant DC-DC converter including an LLC converter circuit, a control unit including: a first module for determining the rms resonance current value from a measurement of the output current, a second module for determining a maximum value of the voltage at the terminals of each resonance capacitor and a minimum value of the voltage at the terminals of each resonance capacitor using rms resonance current value, a comparison module, a disconnection element configured to stop operation of the resonant DC-DC converter in the event of an overload.

Abstract: Disclosed are non-noble element compositions of matter, structures, and methods for producing the catalysts that can catalyze oxygen reduction reactions (ORR). The disclosed composition of matter can be comprised of graphitic carbon doped with nitrogen and associated with one or two kinds of transition metals. The disclosed structure is a three dimensional, porous structure comprised of a plurality of the disclosed compositions of matter. The disclosed structure can be fashioned into an electrode of an electrochemical cell to serve as a diffusion layer and also to catalyze an ORR. Two methods are disclosed for producing the disclosed composition of matter and structure. The first method is comprised of two steps, and the second method is comprised of a single step.