Abstract: A method for acquiring point of interest (POI) representation information, includes: acquiring a POI relationship graph, and acquiring a node relationship set of each node on the POI relationship graph based on the POI relationship graph, in which the POI relationship graph includes edges representing relationships between nodes of POIs, and the node relationship set includes relationship paths where the node reaches all second-order neighbor nodes via any one first-order neighbor node; acquiring a spatial distance matrix between the node and corresponding second-order neighbor nodes; and determining first POI representation information of the node based on the node relationship set of the node and the spatial distance matrix.

Abstract: A driving device including a transmission mechanism, a lever handle, and a locking mechanism. The transmission mechanism includes a mounting housing and a movable member. The mounting housing is formed with a sliding groove, and the stopper edges are respectively disposed on the tops of two sidewalls of the sliding groove. The movable member is configured to pass through the sliding groove. The bottom wall of the movable member is provided with a transmission rack. The lever handle includes a handle, a mount, a connection shaft, and a second fastener. An end of the handle is formed with a second mounting groove that is provided with an internal tooth portion. The mount is disposed in the second mounting groove and can be connected to a section bar member. The connection shaft is rotatably disposed in the mount and includes a first external tooth portion and a second external tooth portion.

Abstract: A reflector for a monocrystal furnace, the monocrystal furnace, and a method for processing the reflector. The inner contour line of the reflector comprises: a first straight line segment extending in a vertical direction, a second straight line segment having one end connected to the first straight line segment and the other end extending obliquely upward, and a line segment group; the included angle ? between the second straight line segment and the vertical direction is greater than or equal to 45°; the line segment group comprises a plurality of straight line segments which are sequentially connected and have different inclination angles, so as to transfer heat, transferred from an ingot to the line segment group, towards a water cooling jacket.

Abstract: A graphite crucible for a mono-crystal furnace and a manufacturing method therefor, a crucible assembly, and a mono-crystal furnace. A groove is formed at a cutting portion. A thermal field simulation is performed on a semi-finished crucible product, a quartz crucible matching with the semi-finished crucible product and a melt to obtain an isotherm of a high temperature region of the melt. The shape of the groove is consistent with the shape of a part of the isotherm in a longitudinal section of a main body. The semi-finished crucible product is constructed such that the groove is produced on an inner wall of the semi-finished crucible product to form the main body.

Abstract: The disclosure discloses a method and a system for controlling temperature during crystal growth. The method includes that: the power of each of the heaters is constantly adjusted and simulating is performed by software to calculate the thermal field correspondingly at a solid-liquid interface and vicinity of the solid-liquid interface; the thermal field is coupled with a moving grid to determine whether the solid-liquid interface and the total thermal energy both reach thermal equilibrium; the power of each of the heaters that enables both the solid-liquid interface and the total thermal energy to reach the thermal equilibrium is stored and a thermal equilibrium diagram is drawn based on the power of each of the heaters; and during crystal growth, the power of each of the heaters is selected from the thermal equilibrium diagram which is drawn to control the temperature gradient at the solid-liquid interface.

Abstract: A system and a method for controlling temperature of semiconductor single crystal growth. The system includes: an image collection apparatus, configured to capture an image of an edge line of a crystal rod that grows at a solid-liquid interface, so as to determine the width of the edge fine at the interface; a heating apparatus, configured to heat a crucible; and a temperature control apparatus, configured to control the heating power of the heating apparatus, and the temperature control apparatus controls the heating power of the heating apparatus according to the width of the edge line.