Abstract: A projection device includes a first projection assembly. The first projection assembly includes a first light source assembly, a first lens, a driving device, and a light-transmitting lampshade. The first light source assembly includes a first light source configured to generate projection light. The first lens is arranged on a light path of the first light source. A plurality of first irregular plano-convex lenses are arranged on a light exit side of the first lens. The driving device is connected to the first lens. The driving device is configured to drive the first lens to rotate. The light-transmitting lampshade is arranged on the light path of the first light source and is arranged behind the first lens. The projection light generated by the first light source sequentially passes through the first lens and the light-transmitting lampshade and emits externally.

Abstract: A projection device includes a first projection assembly. The first projection assembly includes a first light source assembly, a first lens, a driving device, and a light-transmitting lampshade. The first light source assembly includes a first light source configured to generate projection light. The first lens is arranged on a light path of the first light source. A plurality of first irregular plano-convex lenses are arranged on a light exit side of the first lens. The driving device is connected to the first lens. The driving device is configured to drive the first lens to rotate. The light-transmitting lampshade is arranged on the light path of the first light source and is arranged behind the first lens. The projection light generated by the first light source sequentially passes through the first lens and the light-transmitting lampshade and emits externally.

Abstract: An unmanned aerial vehicle (UAV) control method includes a takeoff process, a following process and a landing process, wherein the takeoff process includes the following steps: unlocking the UAV, and detecting the current horizontal position of the UAV in the horizontal direction and the current altitude of the UAV in the vertical direction; determining whether the current horizontal position and the current altitude meet takeoff criteria, and controlling the UAV to bounce off and enter into a takeoff state if the determination result is positive. The system provided by the present disclosure employs the above-mentioned method to control a UAV. The method and system provided by the present disclosure meet three functional requirements for a UAV on a moving base platform, namely, stable takeoff, following process and accurate landing, thus decrease the difficulties in the use of a UAV on a moving platform.

Abstract: A projection device comprises first light sources, an interference disk, a condensing lampshade, and a driving device. Both of the interference disk and the condensing lampshade are arranged on light paths of the first light sources. The condensing lampshade is arranged behind the interference disk, and the interference disk is made stationary relative to the first light sources. The driving device drives the condensing lampshade to rotate. When the driving device drives the condensing lampshade to rotate, the projection light emitted after sequentially passing through the interference disk and the condensing lampshade projects an effect of clouds moving. The light paths of the projection light emitted by the first light sources are relatively stable after passing through the interference disk and before entering the condensing lampshade.

Abstract: A projection device comprises first light sources, an interference disk, a condensing lampshade, and a driving device. Both of the interference disk and the condensing lampshade are arranged on light paths of the first light sources. The condensing lampshade is arranged behind the interference disk, and the interference disk is made stationary relative to the first light sources. The driving device drives the condensing lampshade to rotate. When the driving device drives the condensing lampshade to rotate, the projection light emitted after sequentially passing through the interference disk and the condensing lampshade projects an effect of clouds moving. The light paths of the projection light emitted by the first light sources are relatively stable after passing through the interference disk and before entering the condensing lampshade.

Abstract: A handheld fan includes a housing, a fan assembly mounted in the housing and close to a rear portion of the housing, a semiconductor chilling plate mounted in the housing and arranged in front of the fan assembly, and a cold conducting piece arranged on a front end of the housing. A front end surface of the semiconductor chilling plate is a cooling surface. The cold conducting piece is attached to the front end surface of the semiconductor chilling plate. An air outlet is defined between the cold conducting piece and the housing.

Abstract: An unmanned aerial vehicle (UAV) control method includes a takeoff process, a following process and a landing process, wherein the takeoff process includes the following steps: unlocking the UAV, and detecting the current horizontal position of the UAV in the horizontal direction and the current altitude of the UAV in the vertical direction; determining whether the current horizontal position and the current altitude meet takeoff criteria, and controlling the UAV to bounce off and enter into a takeoff state if the determination result is positive. The system provided by the present disclosure employs the above-mentioned method to control a UAV. The method and system provided by the present disclosure meet three functional requirements for a UAV on a moving base platform, namely, stable takeoff, following process and accurate landing, thus decrease the difficulties in the use of a UAV on a moving platform.

Abstract: A method of zero configuration for a virtual distributed device in a distributed network is disclosed. A plurality of peer devices are added as virtual devices to a network device. Configuration information is imported to the network device. A peer group comprising the plurality of peer devices, and corresponding topology of the peer group, are established in the network device. A connection between the network device and one of the plurality of peer devices is established via an uplink switch, the plurality of peer devices being connected to one another by virtual links. The network device distributes the configuration information to the plurality of peer devices in accordance with the established topology via the peer device connected to the uplink switch.

Abstract: A NOR flash memory array structure is provided, comprising: a substrate (100); and a two dimensional memory array structure formed on the substrate (100) and comprising: a plurality of memory cell columns arranged in a first direction, and each memory cell column including a plurality of memory cells (300), in which each memory cell (300) comprises: a channel region (308) located on the substrate (100), a gate structure located on the channel region (308) and formed by a tunneling oxide layer (304), a silicon nitride layer (303), a barrier oxide layer (302) and a polysilicon gate layer (301) stacked sequentially, a source region (306) and a drain region (305) located at a first edge and a second edge of the gate structure respectively; a plurality of word lines WL; a source line SL for connecting the source regions of all the memory cells; and a plurality of bit lines BL.

Abstract: A NOR flash memory array structure is provided, comprising: a substrate (100); and a two dimensional memory array structure formed on the substrate (100) and comprising: a plurality of memory cell columns arranged in a first direction, and each memory cell column including a plurality of memory cells (300), in which each memory cell (300) comprises: a channel region (308) located on the substrate (100), a gate structure located on the channel region (308) and formed by a tunneling oxide layer (304), a silicon nitride layer (303), a barrier oxide layer (302) and a polysilicon gate layer (301) stacked sequentially, a source region (306) and a drain region (305) located at a first edge and a second edge of the gate structure respectively; a plurality of word lines WL; a source line SL for connecting the source regions of all the memory cells; and a plurality of bit lines BL.

Abstract: A method of zero configuration for a virtual distributed device in a distributed network is disclosed. A plurality of peer devices are added as virtual devices to a network device. Configuration information is imported to the network device. A peer group comprising the plurality of peer devices, and corresponding topology of the peer group, are established in the network device. A connection between the network device and one of the plurality of peer devices is established via an uplink switch, the plurality of peer devices being connected to one another by virtual links. The network device distributes the configuration information to the plurality of peer devices in accordance with the established topology via the peer device connected to the uplink switch.