Abstract: Provided is a method for calibrating an error of installation of an interferometer in a multi-axis laser displacement measurement system, including: adding one or more redundant interferometers in a laser interferometer displacement measurement system; then establishing displacement calculating equations containing installation error of the laser interferometer and obtaining redundant measurement information by continuously measuring displacement information of multiple points, wherein the number of the combined displacement calculating equations is equal to the number of unknown quantities; and further solving the equation set to obtain the installation error of the interferometer. With a redundant arrangement of the laser interferometer, self-calibration of the installation error thereof can be achieved.

Abstract: Embodiments of the present disclosure relate to a method and apparatus for determining a text color. The method may include: determining, in response to detecting a text frame on canvas, a subimage corresponding to the text frame from the canvas; acquiring color values of pixels in the subimage, to determine an average color value of the subimage; determining an average luminance value of the subimage based on the average color value of the subimage; and determining a color of text to be inputted into the text frame based on the average luminance value of the subimage.

Abstract: Disclosed is a magnetic-fluid momentum sphere, which is used for satellite attitude adjustment. The magnetic-fluid momentum sphere comprises stators and a spherical shell. The stators are classified into three groups, axes of the three groups of stators are orthogonal to each other, each group comprises two stators arranged symmetrically about the center of the spherical shell, and the inner surfaces of the stators are spherical surfaces. The spherical shell is formed by combining two hemispherical shells, the material of the spherical shell is a non-ferromagnetic material, the inner surfaces of the stators closely adhere to the outer surface of the spherical shell, there is no relative movement between the spherical shell and the inner surfaces of the stators, and the spherical shell is filled with magnetic fluid. The magnetic-fluid momentum sphere achieves a small size and mass, low costs, and small coupling among the axes.

Abstract: Embodiments of the present disclosure presents a method and apparatus for generating a customized visualization component. A specific embodiment of the method comprises: determining, in response to receiving a creation instruction for instructing to create a customized visualization component, a visualization instance presented on a current component editing page based on the received creation instruction; determining an initial visualization component corresponding to the visualization instance and a user setting parameter set by a user for the visualization instance; and uploading a creation request for the customized visualization component to a server to enable the server to generate the customized visualization component based on the initial visualization component and the user setting parameter, the creation request including identifier information of the initial visualization component and the user setting parameter.

Abstract: A magnetic levitation reaction sphere includes a spherical-housing-shaped rotor and three groups of stators. Each group includes two stators using the sphere center of the rotor as a symcenter. Axes of the three groups are mutually orthogonal. Each stator comprises a stator core and a coil array. An air gap is reserved between an inner surface of each stator core and the outer surface of the rotor. Through grooves are radially formed in the stator cores. The coil arrays are disc-type motor stator windings. Two effective sides of each coil in each coil array are respectively placed in two through grooves of the corresponding stator core. The magnetic levitation reaction sphere has low cost; levitation and rotation driving are integrated; the magnetic levitation reaction sphere has a simple and compact structure, a small size and a low mass, and relates to inherent stable levitation; and the levitation control is simple.

Abstract: The invention belongs to the research technology field of urban transportation planning and traffic big data, and provides a method to quantitatively analyze the impact of urban built environment on road travel time. Firstly, the average speed and the built environment attribute information of each small road section are extracted, based on the taxi GPS data and the spatial geographic information data on the research route. Then, taking the average speed of each small section as the dependent variable, the built environment attribute of the road section is used as the key independent variable, and the virtual variable of the nearest intersection type of the road section is used as the adjustment variable. The regression analysis is carried out with considering the interaction between the key independent variable and the adjustment variable, and the key independent variables which significantly affect the average speed of the road sections are selected from the obtained regression results.

Abstract: Disclosed is a magnetic-fluid momentum sphere, which is used for satellite attitude adjustment. The magnetic-fluid momentum sphere comprises stators and a spherical shell. The stators are classified into three groups, axes of the three groups of stators are orthogonal to each other, each group comprises two stators arranged symmetrically about the center of the spherical shell, and the inner surfaces of the stators are spherical surfaces. The spherical shell is formed by combining two hemispherical shells, the material of the spherical shell is a non-ferromagnetic material, the inner surfaces of the stators closely adhere to the outer surface of the spherical shell, there is no relative movement between the spherical shell and the inner surfaces of the stators, and the spherical shell is filled with magnetic fluid. The magnetic-fluid momentum sphere achieves a small size and mass, low costs, and small coupling among the axes.

Abstract: A magnetic levitation reaction sphere includes a spherical-housing-shaped rotor and three groups of stators. Each group includes two stators using the sphere center of the rotor as a symcenter. Axes of the three groups are mutually orthogonal. Each stator comprises a stator core and a coil array. An air gap is reserved between an inner surface of each stator core and the outer surface of the rotor. Through grooves are radially formed in the stator cores. The coil arrays are disc-type motor stator windings. Two effective sides of each coil in each coil array are respectively placed in two through grooves of the corresponding stator core. The magnetic levitation reaction sphere has low cost; levitation and rotation driving are integrated; the magnetic levitation reaction sphere has a simple and compact structure, a small size and a low mass, and relates to inherent stable levitation; and the levitation control is simple.

Abstract: A six-degree-of-freedom displacement measurement method for an exposure region on a wafer stage, the wafer stage comprises a coil array and a movable platform. A planar grating is fixed below a permanent magnet array of the movable platform. A reading head is fixed in a gap of the coil array. A measurement region is formed on the planar grating by an incident measurement light beam of the reading head. The reading head measures the six-degree-of-freedom displacement of the measurement region, so that the six-degree-of-freedom displacement of the exposure region is obtained through calculation. In the method, the six-degree-of-freedom displacement of the exposure region at any time is measured; the measurement complexity is reduced and the measurement precision is improved, and especially, the six-degree-of-freedom displacement of the exposure region can be precisely measured at any time even if the movable platform has high flexibility.

Abstract: A six-degree-of-freedom displacement measurement method for an exposure region on a wafer stage, the wafer stage comprises a coil array and a movable platform. A planar grating is fixed below a permanent magnet array of the movable platform. A reading head is fixed in a gap of the coil array. A measurement region is formed on the planar grating by an incident measurement light beam of the reading head. The reading head measures the six-degree-of-freedom displacement of the measurement region, so that the six-degree-of-freedom displacement of the exposure region is obtained through calculation. In the method, the six-degree-of-freedom displacement of the exposure region at any time is measured; the measurement complexity is reduced and the measurement precision is improved, and especially, the six-degree-of-freedom displacement of the exposure region can be precisely measured at any time even if the movable platform has high flexibility.

Abstract: A three-DOF (Degree of Freedom) heterodyne grating interferometer displacement measurement system comprises a dual-frequency laser, a grating interferometer, a measurement grating, receivers and an electronic signal processing component; the grating interferometer comprises a polarizing beam splitter, a reference grating and dioptric elements; the measurement system realizes displacement measurement on the basis of grating diffraction, the optical Doppler Effect and the optical beat frequency principle. Three linear displacements can be output by the system when the grating interferometer and the measurement grating perform a three-DOF linear relative motion. The measurement system can reach sub-nanometer and higher resolution and precision, and can simultaneously measure three linear displacements.

Abstract: A coarse motion and fine motion integrated reticle stage driven by a planar motor comprises a movable platform (100) of the reticle stage, a balance mass (200), a drive motor, a mask plate (101, 102), a base (001), a vibration isolation system (500), and a measuring system, wherein, the vibration isolation system is located between the balance mass and the base, and the mask plate is mounted on the movable platform. The drive motor of the movable platform is a moving-iron type planar motor (300). The reticle stage can lower the design complexity of the drive motor of the movable platform. Compared with a linear motor, the planar motor can provide push forces in more directions, the number of motors is reduced, the structure of the movable platform is more compact, the inherent frequency and the control bandwidth of the movable platform are improved, and thus control precision is improved.

Abstract: An optical grating phase modulator for a laser interference photoetching system is composed of a substrate, an optical grating, an electric motor and an optical grating positioner. The optical grating, the electric motor and the optical grating positioner are all mounted on the substrate. The optical grating is circular or rectangular, and adopt transmission or reflection type optical grating. A light beam is incident on the optical grating and generates diffraction, and when the electric motor drives the optical grating to continuously move relative to the incident light beam, diffracted light will generate a frequency shift, thereby realizing the phase modulation of the light beam. The optical grating phase modulator has the advantages of high phase modulation speed, high regulation precision and wide regulation range, thereby improving the whole performance of an interference photoetching system.

Abstract: A mobile communication device and a radiated power adjusting method thereof are provided. The mobile communication device includes an antenna, a signal measurement module, a proximity sensing module and a controlling module. The antenna receives a radio-frequency signal, and the signal measurement module is coupled to the antenna and measures a signal parameter of the radio-frequency signal. The proximity sensing module is switched between an activation mode and an original detection mode according to existence of an object, wherein a sensing conductor is configured adjacent to an adjusted antenna. The controlling module is coupled to the signal measurement module and the proximity sensing module, and the controlling module adjusts the radiated power of the adjusted antenna. When the signal parameter decreases more than a threshold value and the proximity sensing module is in the activation mode, the controlling module reduces the radiated power of the adjusted antenna.

Abstract: A magnetically suspended coarse motion and fine motion integrated reticle stage driven by a planar motor comprises a movable platform (100), a balance mass (200), a drive motor, a mask plate (101), a base (001), a vibration isolation system (500), and a measuring system, wherein, the vibration isolation system is located between the balance mass and the base, and the mask plate is mounted on the movable platform. The drive motor of the movable platform is a moving-iron type planar motor (300). The reticle stage can lower the design complexity of the drive motor of the movable platform. Compared with a linear motor, the planar motor can provide push forces in more directions, the number of motors is reduced, the structure of the movable platform is more compact, the inherent frequency and the control bandwidth of the movable platform are improved, and thus control precision is improved.

Abstract: A negative stiffness system for gravity compensation of a micropositioner of wafer table in lithography machine, characterized in that, the negative stiffness system includes at least three sets of quasi-zero stiffness units, each of the sets of quasi-zero stiffness units comprises a pair of negative stiffness springs and a positive stiffness spring, the positive stiffness spring is vertically positioned, the pair of negative stiffness springs are obliquely and symmetrically positioned at two sides of the positive stiffness spring, upper ends of the negative stiffness springs and the positive stiffness spring are connected together and fixed to the bottom surface of a rotor of the micropositioner, and lower ends of the negative stiffness springs and the positive stiffness spring are connected to a base, respectively. The system reduces the stiffness in vertical direction and prevents the influence of permanent magnet on its surroundings, while improving the bearing capacity.

Abstract: A coarse motion and fine motion integrated reticle stage driven by a planar motor comprises a movable platform (100) of the reticle stage, a balance mass (200), a drive motor, a mask plate (101, 102), a base (001), a vibration isolation system (500), and a measuring system, wherein, the vibration isolation system is located between the balance mass and the base, and the mask plate is mounted on the movable platform. The drive motor of the movable platform is a moving-iron type planar motor (300). The reticle stage can lower the design complexity of the drive motor of the movable platform. Compared with a linear motor, the planar motor can provide push forces in more directions, the number of motors is reduced, the structure of the movable platform is more compact, the inherent frequency and the control bandwidth of the movable platform are improved, and thus control precision is improved.

Abstract: A magnetically suspended coarse motion and fine motion integrated reticle stage driven by a planar motor comprises a movable platform (100), a balance mass (200), a drive motor, a mask plate (101), a base (001), a vibration isolation system (500), and a measuring system, wherein, the vibration isolation system is located between the balance mass and the base, and the mask plate is mounted on the movable platform. The drive motor of the movable platform is a moving-iron type planar motor (300). The reticle stage can lower the design complexity of the drive motor of the movable platform. Compared with a linear motor, the planar motor can provide push forces in more directions, the number of motors is reduced, the structure of the movable platform is more compact, the inherent frequency and the control bandwidth of the movable platform are improved, and thus control precision is improved.

Abstract: A touch device and a control method thereof are provided. In the control method, a sensing signal generated by a sensor is received. When an operating object is present, a touch screen is configured for touchable regions and untouchable regions, wherein the untouchable regions cannot generate a response through a touch by the operating object. A gesture is received on the untouchable regions of the touch screen, a processor determines whether the gesture is conformed to a default gesture setting, and the processor decides whether or not to adjust part or all of the untouchable regions to the touchable regions according to the determining result. Accordingly, the touch device and the control method thereof of the embodiments of the invention can prevent or lower the occurrence of an accidental touch by a user and enhance the operating convenience of the user.

Abstract: A three-DOF (Degree of Freedom) heterodyne grating interferometer displacement measurement system comprises a dual-frequency laser, a grating interferometer, a measurement grating, receivers and an electronic signal processing component; the grating interferometer comprises a polarizing spectroscope, a reference grating and dioptric elements; the measurement system realizes displacement measurement on the basis of grating diffraction, the optical Doppler Effect and the optical beat frequency principle. Three linear displacements can be output by the system when the grating interferometer and the measurement grating perform a three-DOF linear relative motion. The measurement system can reach sub-nanometer and even higher resolution and precision, and can simultaneously measure three linear displacements. The measurement system has the advantages of being environmentally insensitive, high in measurement precision, small in size, light in weight, etc.