Abstract: A steel board for polar marine engineering and a preparation method therefor. According to weight percentage, the components of the steel board are: C: 0.06-0.09%, Si: 0.20-0.35%, Mn: 1.48-1.63%, Nb: 0.020%-0.035%, Ti: 0.010%-0.020%, V: 0.020%-0.035%, Ni: 0.08%-0.17%, Als: 0.015%-0.040%, P: ?0.013% and S: ?0.005%. The preparation method for the steel board comprises: pre-refining, refining and casting to obtain a cast billet, and the slowly cooling down same. The slowly cooled billet is heated and then rolled out to obtain the steel board; and the steel board is cooled down and ready. The steel has an excellent comprehensive performance in terms of having high strength and low temperature resistance, being easy to weld and corrosion proof, and the steel has good low-temperature aging impact toughness.

Abstract: A control method for controlling terminal state switching includes a terminal obtaining first data of the terminal and second data from a wearable device that is bound to the terminal when receiving an unlocking instruction in a lock screen state. If the first data and the second data meet a preset condition, the terminal performs the operation of unlocking.

Abstract: The present disclosure includes artificial intelligence systems and methods for identifying grids for a geofence in an area in a map that includes a plurality of independently indexed regions of grids. The map is gridded into a plurality of grids and divided into a plurality of partitions. The methods include obtaining information of the geofence in the map, and determining a boundary grid series of the geofence from the plurality of grids. The methods include identifying at least one enclosed area in the geographical region, and upon determining that an enclosed area crosses two or more partitions, segmenting the enclosed area into two or more sub-areas. The methods also include determining boundary grids for each sub-area, and identifying internal grids in the sub-area for each sub-area. The methods further include identifying grids in the geographical region by collecting the boundary grids and the internal grids.

Abstract: A control method for controlling terminal state switching includes a terminal obtaining first data of the terminal and second data from a wearable device that is bound to the terminal when receiving an unlocking instruction in a lock screen state. If the first data and the second data meet a preset condition, the terminal performs the operation of unlocking.

Abstract: In a control method relating to the field of electronic device control technologies, and in particular, to a technology for controlling terminal state switching, when receiving a state switching instruction in a lock screen state, a terminal obtains motion data within a predetermined lime period of the terminal and an intelligent wearable device bound to the terminal. When a deviation between two groups of motion data is less than a deviation threshold, the terminal performs state switching. The terminal state switching is implemented through cooperation of the intelligent wearable device, and therefore a possibility of leakage of information in the terminal can be reduced.

Abstract: Systems and methods for determining whether an object belongs to a target geo-fence are provided. The method may include: obtaining geographic coordinates corresponding to a geographic location of the object; determining information of a grid corresponding to the geographic coordinates; indexing the grid, based on the information of the grid, in a first grid database. The object may not belong to the target geo-fence if the indexed grid is not in the first grid database. The method may further include indexing the grid, based on the information of the grid, in a second grid database if the indexed grid is in the first grid database. The object may belong to the target geo-fence if the indexed grid is not in the second grid database. The method may further include determining whether the object belongs to the target geo-fence based on a relationship of the object and a local geo-fence if the indexed grid is in the second grid database.

Abstract: Systems and methods for determining whether an object belongs to a target geo-fence are provided. The method may include: obtaining geographic coordinates corresponding to a geographic location of the object; determining information of a grid corresponding to the geographic coordinates; indexing the grid, based on the information of the grid, in a first grid database. The object may not belong to the target geo-fence if the indexed grid is not in the first grid database. The method may further include indexing the grid, based on the information of the grid, in a second grid database if the indexed grid is in the first grid database. The object may belong to the target geo-fence if the indexed grid is not in the second grid database. The method may further include determining whether the object belongs to the target geo-fence based on a relationship of the object and a local geo-fence if the indexed grid is in the second grid database.

Abstract: The present disclosure includes artificial intelligence systems and methods for identifying grids for a geofence in an area in a map that includes a plurality of independently indexed regions of grids. The map is gridded into a plurality of grids and divided into a plurality of partitions. The methods include obtaining information of the geofence in the map, and determining a boundary grid series of the geofence from the plurality of grids. The methods include identifying at least one enclosed area in the geographical region, and upon determining that an enclosed area crosses two or more partitions, segmenting the enclosed area into two or more sub-areas. The methods also include determining boundary grids for each sub-area, and identifying internal grids in the sub-area for each sub-area. The methods further include identifying grids in the geographical region by collecting the boundary grids and the internal grids.

Abstract: A circumcision apparatus includes a fixed support; a first through hole and a second through hole are machined on the fixed support along a same axial line; a knife rack shaft is penetrated through the first through hole; the first end of the knife rack shaft is connected with a locking mechanism to lock and position the knife rack shaft on the fixed support, the second end of the knife rack shaft is connected with a protective cover; the protective cover is extended to the exterior of the fixed support via the second through hole; the protective cover and the knife rack shaft are coaxial in detachable connection; a positioning sleeve in clearance fit with the protective cover is arranged at the second through hole; the positioning sleeve and the fixed support are in the detachable connection; and a space between the positioning sleeve and the protective cover is adaptive.

Abstract: In a control method relating to the field of electronic device control technologies, and in particular, to a technology for controlling terminal state switching, when receiving a state switching instruction in a lock screen state, a terminal obtains motion data within a predetermined lime period of the terminal and an intelligent wearable device bound to the terminal. When a deviation between two groups of motion data is less than a deviation threshold, the terminal performs state switching. The terminal state switching is implemented through cooperation of the intelligent wearable device, and therefore a possibility of leakage of information in the terminal can be reduced.

Abstract: A terminal device having a rotatable image capture component, including a magnetic body and a sensor. A change in the magnetic flux caused by rotation of the magnetic body is identified by the sensor, and used to identify whether the image capture component is in a front-facing state or a rear-facing state. The magnetic body is mounted in a connector of the image capture component or at an end of the connector. The sensor is mounted on a circuit board using a bottom surface perpendicular to a Z-axis of the sensor. When the image capture component is at a front-facing position and a rear-facing position, an angle between a connection line, which connects a south pole and a north pole of the magnetic body, and a radial line of an image capture unit included in the image capture component is less than a preset value in a rotation direction.

Abstract: The present disclosure discloses a composite balance ring and a washing machine. The balance ring is internally hollow to form a chamber. The chamber is horizontally provided with a partition plate which divides the chamber into upper and lower chambers. The upper and lower chambers communicate through an overflow structure and a backflow structure, and the chamber is filled with balancing liquid with a level close to the partition plate. During the dehydration process of the washing machine, the balancing liquid in the lower chamber overflows into the upper chamber by a low overflow speed through a narrow gap that forms the overflow structure, and the balancing liquid remaining in the lower chamber provided with a counterweight force in the inner tub, so that the increase of eccentric displacement of the inner tub due to eccentric flowing of the balancing liquid is avoided.

Abstract: A terminal device having a rotatable image capture component, including a magnetic body and a sensor. A change in the magnetic flux caused by rotation of the magnetic body is identified by the sensor, and used to identify whether the image capture component is in a front-facing state or a rear-facing state. The magnetic body is mounted in a connector of the image capture component or at an end of the connector. The sensor is mounted on a circuit board using a bottom surface perpendicular to a Z-axis of the sensor. When the image capture component is at a front-facing position and a rear-facing position, an angle between a connection line, which connects a south pole and a north pole of the magnetic body, and a radial line of an image capture unit included in the image capture component is less than a preset value in a rotation direction.

Abstract: A circumcision apparatus includes a fixed support; a first through hole and a second through hole are machined on the fixed support along a same axial line; a knife rack shaft is penetrated through the first through hole; the first end of the knife rack shaft is connected with a locking mechanism to lock and position the knife rack shaft on the fixed support, the second end of the knife rack shaft is connected with a protective cover; the protective cover is extended to the exterior of the fixed support via the second through hole; the protective cover and the knife rack shaft are coaxial in detachable connection; a positioning sleeve in clearance fit with the protective cover is arranged at the second through hole; the positioning sleeve and the fixed support are in the detachable connection; and a space between the positioning sleeve and the protective cover is adaptive.

Abstract: The present disclosure discloses a composite balance ring and a washing machine. The balance ring is internally hollow to form a chamber. The chamber is horizontally provided with a partition plate which divides the chamber into upper and lower chambers. The upper and lower chambers communicate through an overflow structure and a backflow structure, and the chamber is filled with balancing liquid with a level close to the partition plate. During the dehydration process of the washing machine, the balancing liquid in the lower chamber overflows into the upper chamber by a low overflow speed through a narrow gap that forms the overflow structure, and the balancing liquid remaining in the lower chamber provided with a counterweight force in the inner tub, so that the increase of eccentric displacement of the inner tub due to eccentric flowing of the balancing liquid is avoided.

Abstract: The preset invention provides a character processing method and device. An instruction for copying a character selected by a user is received; an icon that is used to identify the character selected by the user is displayed on a screen of user equipment according to the instruction; an instruction of the user for moving the icon to an input position is received; and the character selected by the user is pasted to the input position according to the instruction of the user for moving the icon to the input position. In this way, it is implemented that a character selected and copied by a user is visible, resolving a problem that a copied character is invisible on a background clipboard.

Abstract: A photographing method and terminal are provided, which achieve that image data of objects in depth-of-field ranges of different focuses is recorded in one time of photographing, avoid loss of image details of an object that is caused when there is only one single fixed focus, and enable a user to see more comprehensive image data, without increasing hardware costs and a volume of an apparatus. The photographing method of the present invention includes: acquiring a photographing instruction; moving a lens according to the photographing instruction; acquiring image data for at least two times in a process in which the lens is moved, to obtain at least two pieces of image data; and generating an image file according to the at least two pieces of image data.

Abstract: In embodiments of the present invention, when a duplicate data query is performed on a received data stream, a first physical node which corresponds to each first sketch value and is in a cluster system is identified according to a first sketch value representing the data stream, and then the first sketch value representing the data stream is sent to the identified physical node for the duplicate data query, and a procedure of the duplicate data query does not change with an increase of the number of nodes in the cluster system; therefore, a calculation amount of each node does not increase with an increase of the number of nodes in the cluster system.

Abstract: In embodiments of the present invention, when a duplicate data query is performed on a received data stream, a first physical node which corresponds to each first sketch value and is in a cluster system is identified according to a first sketch value representing the data stream, and then the first sketch value representing the data stream is sent to the identified physical node for the duplicate data query, and a procedure of the duplicate data query does not change with an increase of the number of nodes in the cluster system; therefore, a calculation amount of each node does not increase with an increase of the number of nodes in the cluster system.

Abstract: A method and apparatus for forming solar cells is provided. In one embodiment, a photovoltaic device includes a antireflection coating layer disposed on a first surface of a substrate, a barrier layer disposed on a second surface of the substrate, a first transparent conductive oxide layer disposed on the barrier layer, a conductive contact layer disposed on the first transparent conductive oxide layer, a first p-i-n junction formed on the conductive contact layer, and a second transparent conductive oxide layer formed on the first p-i-n junction.