Abstract: Aspects relating to machine learning includes receiving, by a first trusted node, a first target data set sent by a first participant, wherein the first target data set is obtained via encrypting, by the first participant, a data set provided by the first participant based on a first preset encryption mode; decrypting the first target data set, determining first training data, and performing model training for a preset machine learning model based on the first training data to obtain a first intermediate training result; acquiring an encrypted second intermediate training result sent by at least one second trusted node; and performing federated learning for the preset machine learning model based on at least the first intermediate training result and the decrypted second intermediate training result, to update model parameters of the preset machine learning model and obtain a learning completed target model.

Abstract: A video playing method includes: displaying a windowed playing control in an out-battle scene interface, the out-battle scene interface being a scene interface of a game other than a battle interface of the game; displaying, in response to a trigger operation on the windowed playing control in the out-battle scene interface, a video playing window on an upper layer of the out-battle scene interface, the first video being played in the video playing window; and closing the video playing window when switching from the out-battle scene interface to the battle interface.

Abstract: A method for generating a special effect for social networking interaction in a virtual environment of a game is performed by an electronic device. The method includes: displaying an object presentation interface of a target battle of the game when loading a virtual scene corresponding to the target battle, the object presentation interface being used for displaying a plurality of virtual objects participating in the target battle; receiving a special effect generating instruction for a first virtual object of the plurality of virtual objects, the special effect generating instruction being used for instructing to generate a special effect based on the first virtual object, and the first virtual object corresponding to a user of the electronic device triggering the special effect; and generating the special effect identifying the first virtual object in the object presentation interface.

Abstract: Aspects relating to machine learning includes receiving, by a first trusted node, a first target data set sent by a first participant, wherein the first target data set is obtained via encrypting, by the first participant, a data set provided by the first participant based on a first preset encryption mode; decrypting the first target data set, determining first training data, and performing model training for a preset machine learning model based on the first training data to obtain a first intermediate training result; acquiring an encrypted second intermediate training result sent by at least one second trusted node; and performing federated learning for the preset machine learning model based on at least the first intermediate training result and the decrypted second intermediate training result, to update model parameters of the preset machine learning model and obtain a learning completed target model.

Abstract: A method for displaying a skin of a virtual character includes: displaying a matchmaking user interface (UI) for matching k user accounts online for gaming in the same virtual world, k being a positive integer; obtaining a customization parameter of a customized skin model of a target virtual character from a server when the target virtual character is present in virtual characters used by the k user accounts; loading n target skin component materials of the customized skin model according to the customization parameter, n being a positive integer; and displaying a gaming UI. The customized skin model is one of complete skin set models corresponding to the target virtual character and includes n skin components in a same style. The gaming UI includes the target virtual character located in the virtual world, the target virtual character wearing the customized skin model.

Abstract: A method for displaying a skin of a virtual character includes: displaying a matchmaking user interface (UI) for matching k user accounts online for gaming in the same virtual world, k being a positive integer; obtaining a customization parameter of a customized skin model of a target virtual character from a server when the target virtual character is present in virtual characters used by the k user accounts; loading n target skin component materials of the customized skin model according to the customization parameter, n being a positive integer; and displaying a gaming UI. The customized skin model is one of complete skin set models corresponding to the target virtual character and includes n skin components in a same style. The gaming UI includes the target virtual character located in the virtual world, the target virtual character wearing the customized skin model.

Abstract: An LED lamp includes a frame, a bracket connected to the frame, two LED modules and driving modules received between the frame and the bracket, and a backplate, a reflective plate, a light guide, a diffusion plate and a cover sequentially sandwiched between the frame and the bracket. The LED modules are oriented towards two opposite lateral sides of the light guide. The light guide has a large amount of scattering dots formed on a back face thereof. The scattering dots are arranged in multiple columns. The sizes of the dots in each column are identical to each other, and the sizes of the dots in different columns gradually increase from two opposite sides towards a middle of the light guide.

Abstract: An LED lamp includes an LED and a lens covering thereon. The LED has an optical axis. The lens includes a light incidence surface adjacent to the LED and a light emission surface opposite to the light incidence surface. A first imaginary plane and a second imaginary plane intersect at the optical axis of the LED, the light emission surface of the lens is symmetric about the first and second imaginary planes, respectively. In the first imaginary plane, light emitted from the light emission surface distribute regions which a light emitting angle of the LED lamp ranges from 0° to about 45°. In the second imaginary plane, light emitted from the light emission surface distribute regions which a light emitting angle of the LED lamp ranges from 0° to about 75°.

Abstract: An LED module includes an LED and a lens fixed with the LED for refracting light emitted by the LED. The lens has a center axis and a concaved inner face for incidence of the light and an opposite convex outer face for the light refracting out thereof. The lens is symmetric to a first plane and a second plane perpendicularly intersected with the first plane at the center axis. In the first plane, a peak intensity for the LED occurs within 68-78 degrees off the center axis. In the second plane, a peak intensity occurs within 0-22 degrees off the center axis.

Abstract: An LED module includes an LED and a lens covering the LED. The LED has an optical axis. The lens has an incident face for incidence of light of the LED into the lens and an opposite emitting face for refracting the light of the LED out of the lens. The emitting face has two elongated, ellipsoid lateral surfaces and a middle surface located between and connecting with the two ellipsoid lateral surfaces. The incident face has a sidewall and a ceiling connecting to a top of the sidewall. The middle surface of the emitting face and the ceiling of the incident face are corresponding to each other and inclined laterally relative to the optical axis of the LED.

Abstract: An LED module includes an LED having an optic axis and a lens fixed over the LED for refracting light emitted by the LED. The lens has a same cross section along a front-to-rear direction thereof. The lens has an inner incidence surface facing the LED and an outer emission surface. The inner incidence surface is concave toward the emission surface. The emission surface has a middle part around the optic axis of the LED concave toward the incidence surface, and two convex lateral parts off the optic axis of the LED. A peak intensity for the light generated by the LED and penetrating through the lens occurs within the convex lateral parts of the emission surface.

Abstract: An exemplary illumination device includes a heat sink, a plurality of LED modules mounted on the heat sink, an envelope engaged with the heat sink and covering the LED modules, and a reflector positioned on the envelope. Light generated by the LED modules emits forward through the envelope out of the illumination device and has a main emission direction. The reflector reflects the light back to a direction sideways and opposite to the main emission direction to increase an illumination area.

Abstract: An LED lamp includes a frame, a bracket connected to the frame, two LED modules and driving modules received between the frame and the bracket, and a backplate, a reflective plate, a light guide, a diffusion plate and a cover sequentially sandwiched between the frame and the bracket. The LED modules are oriented towards two opposite lateral sides of the light guide. The light guide has a large amount of scattering dots formed on a back face thereof. The scattering dots are arranged in multiple columns. The sizes of the dots in each column are identical to each other, and the sizes of the dots in different columns gradually increase from two opposite sides towards a middle of the light guide.

Abstract: An LED module includes an LED and a lens covering the LED. The LED has an optical axis. The lens has an incident face for incidence of light of the LED into the lens and an opposite emitting face for refracting the light of the LED out of the lens. The emitting face has two elongated, ellipsoid lateral surfaces and a middle surface located between and connecting with the two ellipsoid lateral surfaces. The incident face has a sidewall and a ceiling connecting to a top of the sidewall. The middle surface of the emitting face and the ceiling of the incident face are corresponding to each other and inclined laterally relative to the optical axis of the LED.

Abstract: An LED lamp includes an LED and a lens covering thereon. The LED has an optical axis. The lens includes a light incidence surface adjacent to the LED and a light emission surface opposite to the light incidence surface. A first imaginary plane and a second imaginary plane intersect at the optical axis of the LED, the light emission surface of the lens is symmetric about the first and second imaginary planes, respectively. In the first imaginary plane, light emitted from the light emission surface distribute regions which a light emitting angle of the LED lamp ranges from 0° to about 45°. In the second imaginary plane, light emitted from the light emission surface distribute regions which a light emitting angle of the LED lamp ranges from 0° to about 75°.

Abstract: An LED module includes an LED having an optic axis and a lens fixed over the LED for refracting light emitted by the LED. The lens has a same cross section along a front-to-rear direction thereof. The lens has an inner incidence surface facing the LED and an outer emission surface. The inner incidence surface is concave toward the emission surface. The emission surface has a middle part around the optic axis of the LED concave toward the incidence surface, and two convex lateral parts off the optic axis of the LED. A peak intensity for the light generated by the LED and penetrating through the lens occurs within the convex lateral parts of the emission surface.

Abstract: An LED module includes an LED and a lens fixed with the LED for refracting light emitted by the LED. The lens has a center axis and a concaved inner face for incidence of the light and an opposite convex outer face for the light refracting out thereof. The lens is symmetric to a first plane and a second plane perpendicularly intersected with the first plane at the center axis. In the first plane, a peak intensity for the LED occurs within 68-78 degrees off the center axis. In the second plane, a peak intensity occurs within 0-22 degrees off the center axis.

Abstract: An LED lamp includes a printed circuit board, a plurality of LED modules mounted on the printed circuit board, and a lens mounted on the printed circuit board and covering the LED modules. The lens includes a bottom surface enclosing the LED modules therein and a top surface located above the bottom surface. Light emitted from the LED modules travels through the bottom surface and the top surface of the lens to illuminate the environment. The bottom surface of the lens is concave and the top surface of the lens is bulgy. Curvatures of constituting portions of the bottom surface are larger than those of corresponding portions constituting the top surface.