Abstract: A scanner for a tracking three-dimensional scanning system is provided. The scanner includes a frame configured as an integral structure and defining an inner cavity and an outer periphery; and a plurality of marker modules disposed at the outer periphery of the frame and configured to be detected by a tracker in the tracking three-dimensional scanning system to obtain three-dimensional spatial coordinates of the scanner.

Abstract: A nanosecond laser spatial-temporal control method for a direct-drive laser facility based on Double-Cone Ignition, while satisfying the near-isentropic compression waveform required for driving implosion, redistributes the temporal waveforms of all sub-beams in the facility. A small portion of the beams are used to generate a low-energy foot pulse, which is focused on a larger target surface. Under the action of the low-energy foot pulse, the target surface contracts slowly inward. By the end of the duration of the low-energy foot pulse, the target surface has contracted to a smaller size. At this moment, the remaining majority of the beams are used to generate the main drive pulse, which is focused on this smaller target surface, thereby achieving zooming.

Abstract: A scanner for a tracking three-dimensional scanning system includes: a frame configured as an integral structure and defining an inner cavity and an outer periphery; and a plurality of marker modules disposed at the outer periphery of the frame and configured to be detected by a tracker.

Abstract: A tracking method for a tracking measurement system including a tracking apparatus is provided. The method includes acquiring a current tracking distance between the tracking apparatus and a to-be-tracked object, and determining, based on the current tracking distance, a tracking parameter level for the tracking apparatus.

Abstract: A multi-mode three-dimensional scanning method includes: obtaining intrinsic parameters and extrinsic parameters of a calibrated camera in different scanning modes, and upon switching between the different scanning modes, triggering a change of parameters of the camera to the intrinsic parameters and the extrinsic parameters in a corresponding scanning mode; and a user selecting to execute a laser-based scanning mode, a speckle-based scanning mode or a transition scanning mode according to a scanning requirement. In the continual fusion and conversion during the whole scanning process, the speckle reconstruction and the laser line reconstruction are unified to the same coordinate system, and the surface point cloud of the object being scanned is output. The present disclosure also provides a multi-mode three-dimensional scanning system.

Abstract: A tracking method for a tracking measurement system including a tracking apparatus is provided. The method includes acquiring a current tracking distance between the tracking apparatus and a to-be-tracked object, and determining, based on the current tracking distance, a tracking parameter level for the tracking apparatus.

Abstract: A three-dimensional scanning system, a scanning path planning method, and a three-dimensional scanning method are provided. The three-dimensional scanning system includes a control apparatus configured to determine a planned scanning path for a to-be-measured object based on a historical scanning path of an object type to which the current to-be-measured object belongs and according to a historical pose and a current pose of a rotary table carrying the to-be-measured object. The three-dimensional scanning system further includes a mechanical arm that includes a gripping end for gripping a scanner to drive the scanner to scan the to-be-measured object according to the planned scanning path under control of the control apparatus.

Abstract: A three-dimensional scanning system includes a scanning apparatus configured to acquire first raw image data of a scanning target. The three-dimensional scanning system further includes a first field programmable gate array (FPGA) module provided in the scanning apparatus and configured to perform computational preprocessing on the first raw image data to obtain valid first feature data. The three-dimensional scanning system further includes a modeling terminal connected to the scanning apparatus and configured to perform modeling processing based on the first feature data to generate a three-dimensional model of the scanning target.

Abstract: The embodiments of the present invention provide a control system and method for a medium-voltage photovoltaic distribution system. The medium-voltage photovoltaic distribution system includes N photovoltaic modules, N DC-DC converters, a DC-AC converter and a line-frequency transformer. Outputs of the N DC-DC converters are connected in parallel to a DC bus. The DC bus is connected to the DC-AC converter. The line-frequency transformer is configured to connect to a medium-voltage AC grid. The control system includes a bus voltage sampling circuit and N DC-DC converter control circuits corresponding to the N DC-DC converters respectively. Each DC-DC converter control circuit includes a bus voltage sampling circuit, a photovoltaic sampling circuit, a droop controller, a maximum power point tracking controller, an input voltage loop regulator and a pulse width modulation wave generating circuit.

Abstract: A multi-mode three-dimensional scanning method includes: obtaining intrinsic parameters and extrinsic parameters of a calibrated camera in different scanning modes, and upon switching between the different scanning modes, triggering a change of parameters of the camera to the intrinsic parameters and the extrinsic parameters in a corresponding scanning mode; and a user selecting to execute a laser-based scanning mode, a speckle-based scanning mode or a transition scanning mode according to a scanning requirement. In the continual fusion and conversion during the whole scanning process, the speckle reconstruction and the laser line reconstruction are unified to the same coordinate system, and the surface point cloud of the object being scanned is output. The present disclosure also provides a multi-mode three-dimensional scanning system.

Abstract: An object surface data detection method and system, an electronic apparatus, and a storage medium. The object surface data detection method, applied to a three-dimensional scanning system comprising detection auxiliary devices and a scanning device, includes: obtaining a unified coordinate system established for the detection auxiliary devices, wherein a number of the detection auxiliary devices is at least two; respectively obtaining first scan data of the scanning device scanning a surface of an object and tracking results of the detection auxiliary devices tracking the scanning device; and comprehensively calculating the tracking results, the first scan data, and the unified coordinate system to obtain an object surface detection result.

Abstract: The embodiments of the present invention provide a control system and method for a medium-voltage photovoltaic distribution system. The medium-voltage photovoltaic distribution system includes N photovoltaic modules, N DC-DC converters, a DC-AC converter and a line-frequency transformer. Outputs of the N DC-DC converters are connected in parallel to a DC bus. The DC bus is connected to the DC-AC converter. The line-frequency transformer is configured to connect to a medium-voltage AC grid. The control system includes a bus voltage sampling circuit and N DC-DC converter control circuits corresponding to the N DC-DC converters respectively. Each DC-DC converter control circuit includes a bus voltage sampling circuit, a photovoltaic sampling circuit, a droop controller, a maximum power point tracking controller, an input voltage loop regulator and a pulse width modulation wave generating circuit.

Abstract: An object surface data detection method and system, an electronic apparatus, and a storage medium. The object surface data detection method, applied to a three-dimensional scanning system comprising detection auxiliary devices and a scanning device, includes: obtaining a unified coordinate system established for the detection auxiliary devices, wherein a number of the detection auxiliary devices is at least two; respectively obtaining first scan data of the scanning device scanning a surface of an object and tracking results of the detection auxiliary devices tracking the scanning device; and comprehensively calculating the tracking results, the first scan data, and the unified coordinate system to obtain an object surface detection result.

Abstract: The present invention provides a phosphorus-containing compound characterized by being a compound represented by the following structure: the compound is a novel immune cell migration inhibitor. The compound has good hydrophilicity and can be developed into eye drops. The compound has a strong inhibitory ability to immune cell migration and can relieve the symptoms of most dry-eye patients.

Abstract: A method for improvement of magnetic performance of sintered NdFeB magnet includes the following steps. Firstly, material containing element R, H and X is to be covered on a surface of the sintered NdFeB magnet to form a finish coat. After that, proceed with a diffusion treatment and an aging treatment to the sintered NdFeB magnet with the finish coat in the environment of vacuum or inert gas. R is at least one of such elements as Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu. H is hydrogen. X is at least one of such elements as C, O, N, S, B, Cl and Si.

Abstract: The present invention provides a phosphorus-containing compound characterized by being a compound represented by the following structure: the compound is a novel immune cell migration inhibitor. The compound has good hydrophilicity and can be developed into eye drops. The compound has a strong inhibitory ability to immune cell migration and can relieve the symptoms of most dry-eye patients.

Abstract: A profile for window, door, facade or cladding elements is disclosed, which comprises a profile body (2) made from thermoplastic material and extending in a longitudinal direction (z) with an essentially constant cross-section (x-y) along the longitudinal direction (z) and having at least one outer surface (2a), and a inorganic containing layer (4) deposited on at least part of the at least one outer surface (2a), wherein the thermoplastic material comprises at least one thermoplastic selected from the group containing polyamide, polyethylene, polybutylene terephthalate, acrylonitrile styrene acrylate, wherein the inorganic containing layer (4) is deposited directly on the profile body (2) using a cold spray technology, and wherein the inorganic containing layer (4) has a thickness in the range from 30 ?m to 450 ?m.

Abstract: The liquid crystal display panel comprises an upper glass substrate and a lower glass substrate, wherein the upper glass substrate comprises a plurality of color-resist units, each of which comprises a red color-resist element, a green color-resist element, and a blue color-resist element that are spaced from one another, and a plurality of black matrixes each being arranged between two adjacent color-resist elements; and wherein the lower glass substrate comprises a plurality of optical filter layers arranged on an outside surface thereof, said optical filter layers corresponding to red color-resist elements, green color-resist elements, and blue color-resist elements respectively, and each optical filter layer having a color the same as a corresponding color-resist element. The structure of the liquid crystal display panel according to the present disclosure is simple.

Abstract: A method for improvement of magnetic performance of sintered NdFeB magnet includes the following steps. Firstly, material containing element R, H and X is to be covered on a surface of the sintered NdFeB magnet to form a finish coat. After that, proceed with a diffusion treatment and an aging treatment to the sintered NdFeB magnet with the finish coat in the environment of vacuum or inert gas. R is at least one of such elements as Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu. H is hydrogen. X is at least one of such elements as C, O, N, S, B, Cl and Si.

Abstract: A backlight module and a liquid crystal display device are disclosed. The backlight module comprises a light guide plate, an optical diaphragm group that is arranged on one side of the light guide plate, and a collimation diaphragm group that is arranged between the light guide plate and the optical diaphragm group. According to the present disclosure, on the one hand, the viewing angle of the backlight module can be reduced through arranging the collimation diaphragm group appropriately, such as the thicknesses of collimation diaphragms, a number of layers thereof, and a refractive index of each layer, so that the requirement of special users can be met. On the other hand, the assembling of the collimation diaphragm group can be simplified through arranging the position thereof. Moreover, in the backlight module according to the present disclosure, since the light is more convergent, the brightness of the backlight module can be improved and the power consumption thereof can be reduced.