Abstract: A method for measuring oil-water distribution using DNP-MRI, comprising adding a free radical for DNP enhanced NMR signal of a water phase or an oil phase in a sample containing oil and water; performing an MRI experiment on the sample, and collecting an MRI image of the sample without DNP enhancement; applying microwave excitation for DNP-MRI experiment under the same MRI experiment condition as step 2, and collecting an MRI image of the sample after DNP enhancement; and comparing the MRI image after DNP enhancement with the MRI image without DNP enhancement. In the MRI image with DNP enhancement, an area with enhanced MRI signal intensity is a selectively enhanced fluid phase distribution area, and an area without obviously changed MRI signal intensity is a non-selectively enhanced fluid phase distribution area. The method is simple, convenient to operate, short in measurement time, and high in measurement efficiency.

Abstract: The present disclosure discloses an optical imaging lens assembly which includes, sequentially from an object side to an image side along an optical axis, a first lens having a refractive power with a concave image-side surface; a second lens having a refractive power; a third lens having a positive refractive power; a fourth lens having a refractive power; a fifth lens having a positive refractive power with a convex image-side surface; and a sixth lens having a positive refractive power with a convex object-side surface and a concave image-side surface, wherein half of a maximum field-of-view angle HFOV of the optical imaging lens assembly satisfies: HFOV>55°, and a distance TTL from an object-side surface of the first lens to an imaging plane along the optical axis and half of a diagonal length ImgH of an effective pixel area on the imaging plane satisfy: 1.2<TTL/ImgH<2.3.

Abstract: The disclosure relates to PET imaging systems and methods. The systems may obtain a plurality of PET images of a subject and a CT image acquired by performing a spiral CT scan on the subject. Each gated PET image may include a plurality of sub-gated PET images. The CT image may include a plurality of sub-CT images each of which corresponds to one of the plurality of sub-gated PET images. The systems may determine a target motion vector field between a target physiological phase and a physiological phase of the CT image based on the plurality of sub-gated PET images and the plurality of sub-CT images. The systems may reconstruct an attenuation corrected PET image corresponding to the target physiological phase based on the target motion vector field, the CT image, and PET data used for the plurality of gated PET images reconstruction.

Abstract: – A network connection method is performed by a terminal, and the method comprises: establishing a pre-connection with a to-be-accessed device, and the to-be-accessed device being a device to access network; generating a first key pair, and sending a first public key In the first key pair to the to-be-accessed device; generating a first shared key based on the first key pair and first key negotiation information corresponding to the to-be-accessed device; encrypting network configuration information of a network device by using the first shared key, to obtain encrypted network configuration information; and sending the encrypted network configuration information to the to-be-accessed device, to allow the to-be-accessed device to decrypt the encrypted network configuration information by a second shared key, and access the network device based on the decrypted network configuration information.

Abstract: The present invention relates to a sensing and control device (40) and method for a weight measurement device (30) comprising a load unit for loading material to be weighted.

Abstract: A method and system for determining a PET image of the scan volume based on one or more PET sub-images is provided. The method may include determining a scan volume of a subject supported by a scan table; dividing the scan volume into one or more scan regions; for each scan region of the one or more scan regions, determining whether there is a physiological motion in the scan region; generating, based on a result of the determination, a PET sub-image of the scan region based on first PET data of the scan region acquired in a first mode or based, at least in part, on second PET data of the scan region acquired in a second mode; and generating a PET image of the scan volume based on one or more PET sub-images.

Abstract: An account binding method, a control device, and a smart device are provided. The method includes the following. A request message is received from a control device, where the request message is for requesting a first string. The first string is generated according to a preset rule, where the first string and a master account logged in the control device have a mapping relationship. The first string is sent to the control device, where the first string is transferred by the control device to a smart device in a preset manner, and the first string is for the server to verify, according to the mapping relationship, validity of establishing a binding relationship between the smart device and the master account.

Abstract: In at least one embodiment, a system for providing a frequency dependent dynamic leakage for noise cancellation is provided. The system includes a noise cancellation controller and a current limiter. The noise cancellation controller is programmed to perform noise cancellation in a vehicle based on a limited input signal. The current limiter is programmed to receive a reference signal from one of an accelerometer or a loudspeaker and to convert the reference signal from a time domain and into a frequency domain to limit the reference signal. The current limiter is further programmed to generate the limited input signal in response to limiting the reference signal.

Abstract: A data exchange method is applied to a first electronic device and includes receiving a first message sent by a second electronic device, wherein the first message carries a first identifier, the first identifier is configured to identify a first transaction to which the first message belongs, an active transaction indicates a transaction initiated by the first electronic device, and a passive transaction indicates a transaction initiated by the second electronic device; in a case where a set bit indicates that the first transaction is the active transaction, feeding a processing result about the first transaction in the first message back to an application layer; and in a case where the set bit indicates that the first transaction is the passive transaction, requesting the application layer to output the processing result about the first transaction based on the first message.

Abstract: A control method and apparatus for of an Internet of Things device, and an electronic device (110) are provided. The method includes: sending an action call to the IoT device, wherein the action call includes a target service instance identification (siid), a target instance identification (iid), and a property parameter.

Abstract: In at least one embodiment, a system for providing a frequency dependent dynamic leakage for noise cancellation is provided. The system includes a noise cancellation controller and a current limiter. The noise cancellation controller is programmed to perform noise cancellation in a vehicle based on a limited input signal. The current limiter is programmed to receive a reference signal from one of an accelerometer or a loudspeaker and to convert the reference signal from a time domain and into a frequency domain to limit the reference signal. The current limiter is further programmed to generate the limited input signal in response to limiting the reference signal.

Abstract: A ball screw spline assembly includes a ball screw spline including a first nut including a first mounting surface adapted to receive a first fastening element; a second nut including a second mounting surface adapted to receive a second fastening element; and a shaft passing through the first nut and the second nut; the housing including a first portion and a second portion, the first portion extends in a direction substantially parallel to the shaft, and the second portion extends in a direction substantially perpendicular to the shaft; a connecting plate coupling the second nut to the first portion, the first nut is installed to the second portion; the first mounting surface and the second mounting surface are located within a space defined by the first portion, the second portion and the connecting plate, such that the ball screw spline is integrally installable to the housing.

Abstract: The present disclosure relates to a control method and a control device of an air conditioning system, and an air conditioning system, and relates to the technical field of air conditioners: the method includes: determining whether piping length compensation is required; if the piping length compensation is required, acquiring one or more metric parameters; and determining a compensation value according to the one or more metric parameters, and adjusting an operating state of the air conditioning system according to the compensation value.

Abstract: This application discloses a lithiation device for applying a lithium film on an electrode plate. The lithiation device includes: a rolling mechanism including a first roller and a second roller, the two rollers configured to roll the electrode plate and the lithium film to apply the lithium film on the electrode plate; an adjustment mechanism connected to the rolling mechanism and configured to adjust a gap and/or a rolling force between the first roller and the second roller; a first monitoring mechanism configured to monitor a length of the electrode plate after the electrode plate passes through the rolling mechanism; and a controller configured to control the adjustment mechanism based on a comparison result of the length monitored by the first monitoring mechanism and a target length so that the length of the electrode plate after the electrode plate passes through the rolling mechanism approximates to the target length.

Abstract: In at least one embodiment, an active noise cancellation system. The system includes a first controller, a data bus, and a second controller. The first controller receives first information from a plurality of noise sensing devices and second information from an audio system. The first controller employs a time division multiplexing scheme to generate a multiplexed stream of data including the first information and the second information. The data bus transmits the multiplexed stream of data on a single data channel. The second controller receives the multiplexed stream of data on the single data channel and separates the first information from the second information on the multiplexed stream of data to perform ANC functionality.

Abstract: Methods and systems for PET image reconstruction are provided. A method may include obtaining an image sequence associated with a subject. The image sequence may include one or more images generated via scanning the subject at one or more consecutive time periods. The method may also include obtaining a target machine learning model. The method may further include generating at least one target image using the target machine learning model based on the image sequence. The at least one target image may present a dynamic parameter associated with the subject. The target machine learning model may provide a mapping between the image sequence and the at least one target image.

Abstract: A heat pump system and a control method therefor. The heat pump system includes a compressor; an indoor heal exchanger; an outdoor heat exchanger, including a first heat exchange portion and a second heat exchange portion, wherein a flow path switching device is provided between the first heat exchange portion and the second heat exchange portion to disconnect or communicate the first heat exchange portion and the second heat exchange portion; a first four-way valve; and a second four-way valve, configured to enable a high-temperature refrigerant to be input into the first heat exchange portion in a heating mode, so as to enable the heat pump system to operate in a heating and deicing mode.

Abstract: The present disclosure may provide a SPECT system. The SPECT system may include a collimator including a group of first pinholes and a group of second pinholes. The group of first pinholes may be configured to remain open. The group of second pinholes may be configured to alternate between an open configuration and a blocked configuration. The collimator may be configured to allow photons to traverse through at least one group of the group of first pinholes or the group of second pinholes. The SPECT system may also include a detector configured to detect at least a portion of the photons that have traversed the collimator.

Abstract: The present disclosure provides an imaging system and method for nuclear medicine imaging. The imaging system may include a detector and a collimator. The detector may be configured to detect photons. The collimator may have at least two sets of pinholes. The at least two sets of pinholes may include a first set of first pinholes and a second set of second pinholes. Each second pinhole of the second set of second pinholes may be equipped with a filter configured to filter the photons.

Abstract: A method and system for determining a PET image of the scan volume based on one or more PET sub-images is provided. The method may include determining a scan volume of a subject supported by a scan table; dividing the scan volume into one or more scan regions; for each scan region of the one or more scan regions, determining whether there is a physiological motion in the scan region; generating, based on a result of the determination, a PET sub-image of the scan region based on first PET data of the scan region acquired in a first mode or based, at least in part, on second PET data of the scan region acquired in a second mode; and generating a PET image of the scan volume based on one or more PET sub-images.