Abstract: A polymer contains a sulfonate group, a benzene ring, and an unsaturated double bond at the same time. The molar ratio of the sulfonate group, the benzene ring, and the unsaturated double bond is 3-8:5-20:10-120. The number average molecular weight of the polymer is 1000-15000 g/mol. The polymer, as a viscosity reducer, has a high resistance to high concentrations of calcium and magnesium ions, a good viscosity reduction effect on super heavy oil, and good natural sedimentation and dehydration properties. It is resistant to viscosity rebound, has good water solubility, and has a simple matching injection process, and is suitable for practical use in oil fields.

Abstract: Provided in the present disclosure is a detachable folding bookshelf, including: a base having a storage cavity, and a folding support frame detectably assembled with the base. The folding support frame has an unfolded state and a folded state, and when in the folded state, the folding support frame is capable of being stored within the storage cavity.

Abstract: A remote sensing image geometric normalization method and apparatus. The method comprises: constructing a pyramid tile structure for a reference image, and releasing reference tile data; calculating the level of a tile to be downloaded and the name of the tile to be downloaded, and downloading corresponding data from the reference tile data to obtain a standard tile set; performing first geometric correction on the image to be subjected to geometric normalization and tiles in the standard tile set to obtain a first image processing result; matching the first image processing result with the tiles in the standard tile set to obtain a plurality of control points, and calculating a result evaluation precision; and determining whether to perform second geometric correction on the first image processing result.

Abstract: A method and apparatus for patching a cloud area of a satellite image sequence. The method includes: identifying and expanding a cloud area and a cloud shadow area from each of a plurality of multispectral images of a target area and generating a plurality of single-band images; calculating at least one reference image required for patching the multispectral image and a patching sequence of reference images; determining a patching area of the multispectral image according to a cloud mask image; replacing pixel values of the patching area with pixel values of non-cloud areas of the reference images according to the patching sequence, to obtain a replacement patching image; recording serial number values of the reference images in the patching area to obtain a replacement reference mask image; and performing cloud patching on each replacement patching image and each replacement mask image in the target area through Poisson fusion.

Abstract: A method may include receiving a digital model of a dental appliance, the digital model may have a plurality of caps. Each cap of the plurality of caps may represent a set of contact points on a tooth. The digital model may have a plurality of links. Each link of the plurality of links may represent a connection between a plurality of caps. The method may include generating a relaxed model of a dental appliance using the digital model of the dental appliance. The method may also include generating a deformed model of the dental appliance using the digital model of the dental appliance and transforming the relaxed model to the deformed model to generate a plurality of parameters for moving the teeth of the patient towards a target tooth arrangement.

Abstract: A method for digital treatment planning may include defining a set of contact points on a tooth of a patient's dentition and a plurality of connections between pairs of the plurality of contact points. The plurality of connections may include Hookian stiffness parameters of a dental appliance between the plurality of contact points. The method may also include generating a relaxed model of a dental appliance using the plurality of contact points and the plurality of connections. The method may also include generating a deformed model of the dental appliance using the plurality of contact points and plurality of connections. The method may also include transforming the relaxed model to the deformed model to direct the patient dentition towards a target tooth arrangement.

Abstract: The present disclosure relates to a magnon spin valve device, a magnon sensor, a magnon field effect transistor, a magnon tunnel junction and a magnon memory. A magnon spin valve device may comprise a first ferromagnetic insulation layer, a non-magnetic conductive layer disposed on the first ferromagnetic insulation layer, and a second ferromagnetic insulation layer disposed on the non-magnetic conductive layer.

Abstract: A method for digital treatment planning may include defining a set of contact points on a tooth of a patient's dentition and a plurality of connections between pairs of the plurality of contact points. The plurality of connections may include Hookian stiffness parameters of a dental appliance between the plurality of contact points. The method may also include generating a relaxed model of a dental appliance using the plurality of contact points and the plurality of connections. The method may also include generating a deformed model of the dental appliance using the plurality of contact points and plurality of connections. The method may also include transforming the relaxed model to the deformed model to direct the patient dentition towards a target tooth arrangement.

Abstract: Systems and methods of generating an orthodontic model are disclosed. The method may include: generating an initial model of a patient dentition; generating a target model of the patient dentition; defining a plurality of caps and a plurality of links, wherein each link connects two of the plurality of caps; generating a relaxed model of a dental appliance from the plurality of caps and the plurality of links; generating a deformed model of a dental appliance from the plurality of caps and plurality of links; and determining a plurality of movements, wherein the plurality of moments transform the relaxed model to the deformed model and wherein the moments are configured to direct the patient dentition from the initial model to the target model.

Abstract: Systems and methods of generating an orthodontic model are disclosed. The method may include: generating an initial model of a patient dentition; generating a target model of the patient dentition; defining a plurality of caps and a plurality of links, wherein each link connects two of the plurality of caps; generating a relaxed model of a dental appliance from the plurality of caps and the plurality of links; generating a deformed model of a dental appliance from the plurality of caps and plurality of links; and determining a plurality of movements, wherein the plurality of moments transform the relaxed model to the deformed model and wherein the moments are configured to direct the patient dentition from the initial model to the target model.

Abstract: A satellite image sequence cloud region repairing method and apparatus.

Abstract: A remote sensing image geometric normalization method and apparatus.

Abstract: Systems and methods of generating an orthodontic model are disclosed. The method may include: generating an initial model of a patient dentition; generating a target model of the patient dentition; defining a plurality of caps and a plurality of links, wherein each link connects two of the plurality of caps; generating a relaxed model of a dental appliance from the plurality of caps and the plurality of links; generating a deformed model of a dental appliance from the plurality of caps and plurality of links; and determining a plurality of movements, wherein the plurality of moments transform the relaxed model to the deformed model and wherein the moments are configured to direct the patient dentition from the initial model to the target model.

Abstract: Disclosed are a distribution transformer terminal and a method for monitoring a state of a distribution transformer court device. The distribution transformer terminal includes an ARM core processor, a carrier communication module connected to a court device, a sub-G wireless communication module connected to the court device and a GPS module connected to the court device. The ARM core processor is connected to the carrier communication module, the sub-G wireless communication module and the GPS module. The ARM core processor is configured to identify a phase of the court device and a court to which the court device belongs, acquire an operating state and fault information of the court device through the sub-G wireless communication module, and acquire geographical location information of the court device through the GPS module.

Abstract: Disclosed are a distribution transformer terminal and a method for monitoring a state of a distribution transformer court device. The distribution transformer terminal includes an ARM core processor, a carrier communication module connected to a court device, a sub-G wireless communication module connected to the court device and a GPS module connected to the court device. The ARM core processor is connected to the carrier communication module, the sub-G wireless communication module and the GPS module. The ARM core processor is configured to identify a phase of the court device and a court to which the court device belongs acquire an operating state and fault information of the court device through the sub-G wireless communication module, and acquire geographical location information of the court device through the GPS module.

Abstract: The present disclosure relates to a magnon spin valve device, a magnon sensor, a magnon field effect transistor, a magnon tunnel junction and a magnon memory. A magnon spin valve device may comprise a first ferromagnetic insulation layer, a non-magnetic conductive layer disposed on the first ferromagnetic insulation layer, and a second ferromagnetic insulation layer disposed on the non-magnetic conductive layer.

Abstract: Systems and methods of generating an orthodontic model are disclosed. The method may include: generating an initial model of a patient dentition; generating a target model of the patient dentition; defining a plurality of caps and a plurality of links, wherein each link connects two of the plurality of caps; generating a relaxed model of a dental appliance from the plurality of caps and the plurality of links; generating a deformed model of a dental appliance from the plurality of caps and plurality of links; and determining a plurality of movements, wherein the plurality of moments transform the relaxed model to the deformed model and wherein the moments are configured to direct the patient dentition from the initial model to the target model.

Abstract: The present disclosure relates to a magnon spin valve device, a magnon sensor, a magnon field effect transistor, a magnon tunnel junction and a magnon memory. A magnon spin valve device may comprise a first ferromagnetic insulation layer, a non-magnetic conductive layer disposed on the first ferromagnetic insulation layer, and a second ferromagnetic insulation layer disposed on the non-magnetic conductive layer.

Abstract: A method for performing shale gas operation is disclosed. The method may include drilling a first well, performing a fracturing operation in the well, recovering shale gas from the first well, supplying at least part of the shale gas recovered from the well to an electrical generator, generating electricity using the generator, and transferring the generated electricity to drilling equipment used to drill a second well.