Abstract: The disclosure provides a method for tree-based machine learning model reduction and an electronic device using the same. A boosting tree model including multiple subtrees is obtained. Subtree importance of each of the subtrees is determined according to feature importance information respectively corresponding to multiple model features of the boosting tree model. At least one continuous tree subset is extracted from the subtrees according to the subtree importance of each of the subtrees. The at least one continuous tree subset includes at least one of the subtrees. At least one reduced boosting tree model of the boosting tree model is obtained according to the at least one continuous tree subset.

Abstract: An optical element driving mechanism is provided and includes a fixed assembly, a movable assembly and a first driving assembly. The movable assembly is movable relative to the fixed assembly. The first driving assembly is configured to drive the movable assembly to move relative to the fixed assembly. The optical element driving mechanism further includes a first opening, and an external light beam travels along a first axis to pass through the first opening.

Abstract: A photodetector includes a first semiconductor layer, an absorption structure, a second semiconductor layer, and a barrier structure. The absorption structure is located on the first semiconductor layer, and having a first conduction band, a first valence band, and a first band gap. The second semiconductor layer is located on the absorption structure, and having a second conduction band, a second valence band, and a second band gap. The barrier structure is located between the absorption structure and the second semiconductor layer, and having a third conduction band, a third valence band, and a third band gap. The third conduction band is greater than the second conduction band or the third valence band is less than the second valence band.

Abstract: The present disclosure provides an optical element driving mechanism, which includes a movable part, a fixed assembly, and a driving assembly. The movable part is configured to be connected to an optical element. The movable part is movable relative to the fixed assembly. The driving assembly is configured to drive the movable part to move relative to the fixed assembly. The movable part includes a connecting assembly configured to position the optical element.

Abstract: An optical element driving mechanism includes a movable assembly, a fixed assembly, and a driving assembly. The movable assembly is configured to be connected to an optical element. The movable assembly is movable relative to the fixed assembly. The driving assembly is configured to drive the movable assembly to move relative to the fixed assembly in a range of motion. The optical element driving mechanism further includes a positioning assembly configured to position the movable assembly at a predetermined position relative to the fixed assembly when the driving assembly is not operating.

Abstract: In example implementations, a computing device is provided. The computing device includes a system management bus, a controller communicatively coupled to the system management bus, a noise generating component communicatively coupled to the controller, a noise cancellation codec communicatively coupled to the system management bus, and a speaker communicatively coupled to the noise cancellation codec. The operating parameters of the noise generating component are provided to the controller. The noise cancellation codec is to receive the operating parameters of the noise generating component from the controller via the system management bus and to generate a noise cancellation signal based on the operating parameters. The speaker outputs the noise cancellation signal to cancel noise generated by the noise generating component.

Abstract: An asymmetric half-bridge converter is provided. The asymmetric half-bridge converter includes a switch circuit, a resonance tank, a current sensor, and a controller. The current sensor senses a waveform of a resonance current flowing through the resonance tank to generate a sensing result. The controller determines the sensing result. When the sensing result indicates that an ending current value of a primary resonance waveform of the resonance current is greater than a predetermined value, the controller performs a first switching operation on the switch circuit. When the sensing result indicates that the ending current value of the primary resonance waveform is less than or equal to the predetermined value, the controller performs a second switching operation on the switch circuit.

Abstract: A method for repairing a polishing pad in real time includes a trimming step, a detection step, and a reconstruction and analysis step. A surface morphology of the polishing pad is reconstructed through detection, and analysis is performed according to the reconstruction, to ensure that a surface of the polishing pad can recover its function after the surface of the polishing pad is trimmed, so that the polishing pad can be used effectively to reduce costs.

Abstract: A method of manufacturing an optical component having micro-structures is described. The method detects a crystallization temperature within a crystallization temperature interval for fully filling the molding material into a mold cavity to rapidly produce the optical element having a micro-structure with a large area.

Abstract: Provided is a dressing device for a carrier. The dressing device comprises a dresser, a swing arm, a base and at least one damper. A first end and a second end of the swing arm are coupled to the dresser and the base, respectively, and the at least one damper is disposed inside the swing arm. Any axial vibration of the dresser or the swing arm during dressing for the carrier can be compensated or attenuated by the damper in an active manner properly, so as to make the surface of the carrier flatter and more uniform, which not only improves a removal rate of material and a polishing result of the surface in the subsequent chemical mechanical planarization process, but also prolongs the service life of the carrier. The present disclosure further relates to a polishing system for dressing the carrier by using the said dressing device.

Abstract: A system and a method for uniformed surface measurement are provided, in which a sensor is provided to perform measurements on a carrier in a polishing machine, and a measuring trajectory of the sensor on the carrier is adjusted by controlling the pivoting of a sensor carrier carrying the sensor and the rotation of a rotating platform in the polishing machine in order to achieve uniformed surface measurements of the carrier and real-time constructions of the surface topography. This allows the polishing state of the carrier to be monitored in real time, thereby improving the efficiency of the polishing process. A sensing apparatus for uniformed surface measurement is also provided.

Abstract: A system and a method for uniformed surface measurement are provided, in which a sensor is provided to perform measurements on a carrier in a polishing machine, and a measuring trajectory of the sensor on the carrier is adjusted by controlling the pivoting of a sensor carrier carrying the sensor and the rotation of a rotating platform in the polishing machine in order to achieve uniformed surface measurements of the carrier and real-time constructions of the surface topography. This allows the polishing state of the carrier to be monitored in real time, thereby improving the efficiency of the polishing process. A sensing apparatus for uniformed surface measurement is also provided.

Abstract: A method of manufacturing an optical component having micro-structures is described. The method detects a crystallization temperature within a crystallization temperature interval for fully filling the molding material into a mold cavity to rapidly produce the optical element having a micro-structure with a large area.

Abstract: A method for repairing a polishing pad in real time includes a trimming step, a detection step, and a reconstruction and analysis step. A surface morphology of the polishing pad is reconstructed through detection, and analysis is performed according to the reconstruction, to ensure that a surface of the polishing pad can recover its function after the surface of the polishing pad is trimmed, so that the polishing pad can be used effectively to reduce costs.

Abstract: A progressive multifocal contact lens and producing method thereof are provided. The progressive multifocal contact lens includes a first optical region of a front optical surface and a second optical region of a back optical surface. The first optical region includes a center zone, an outer zone and an intermediate zone connected between the center zone and outer zone where the center zone and outer zone are selected from a distance vision power and a near vision power and the intermediate zone is configured to adjust the optical power of the distance vision power and the near vision power so that the optical power or add power of the first optical region on the front optical surface forms a normal cumulative distribution function.

Abstract: An in-mold vibratile injection compression molding method and molding apparatus thereof are described. While performing a filling stage, a first piezoelectric actuator and a second piezoelectric actuator are use to vibrate the molding material along at least two directions for precisely filling the molding material into the micro-structure by adjusting the filling flow velocity of the molding material associated with the proper molding material temperature and by maintaining a molding material temperature of a skin solidified layer in the cavity between a glass transition temperature and a melting temperature in order to avoid the form error, to increase the groove filling rate and to improve the residual stress.

Abstract: A method of manufacturing an optical component having micro-structures is described. The method detects a crystallization temperature within a crystallization temperature interval for fully filling the molding material into a mold cavity to rapidly produce the optical element having a micro-structure with a large area.

Abstract: A progressive multifocal contact lens and producing method thereof are provided. The progressive multifocal contact lens includes a first optical region of a front optical surface and a second optical region of a back optical surface. The first optical region includes a center zone, an outer zone and an intermediate zone connected between the center zone and outer zone where the center zone and outer zone are selected from a distance vision power and a near vision power and the intermediate zone is configured to adjust the optical power of the distance vision power and the near vision power so that the optical power or add power of the first optical region on the front optical surface forms a normal cumulative distribution function.

Abstract: A novel polishing pad is described. The polishing pad includes a base plate, a main polishing body, a plurality of metal bottom portions, a positive electrode conductive wire and a negative electrode conductive wire. The main polishing body made from a non-conductive material and disposed on the base plate includes a plurality of cavities thereon. The metal bottom portions are disposed in the cavities with each of the cavities having one of the metal bottom portions therein. The positive electrode conductive wire electrically is connected to a positive electrode of a power supply. The negative electrode conductive wire electrically is connected to a negative electrode of the power supply. The positive electrode conductive wire and the negative electrode conductive wire alternatively pass through the base plate and connect to the metal bottom portions respectively.

Abstract: An in-mold vibratile injection compression molding method and molding apparatus thereof are described. While performing a filling stage, a first piezoelectric actuator and a second piezoelectric actuator are use to vibrate the molding material along at least two directions for precisely filling the molding material into the micro-structure by adjusting the filling flow velocity of the molding material associated with the proper molding material temperature and by maintaining a molding material temperature of a skin solidified layer in the cavity between a glass transition temperature and a melting temperature in order to avoid the form error, to increase the groove filling rate and to improve the residual stress.