Abstract: In a method of controlling a smart television (TV), one or more portable electronic device are authenticated to control the smart TV. When more than one authenticated portable electronic devices send a power-on signal to the smart TV, a normal mode is executed. When only one authenticated portable electronic device sends a power-on signal to the smart TV, a personal mode can be executed. The personal mode comprises a favorite program list, which records names of one or more programs, and a favorite channel list, which records one or more channels and times of broadcasting programs of the channels. Then, the smart TV is controlled according to commands sent by the one or more authenticated portable electronic devices.

Abstract: In a method for changing TV channels of a television using a remote control device, the method locates a location of the remote control device, obtains channels of TV stations from a database according to a relation between the location of the remote control device and the channels of the TV stations. The method displays the channels of the TV stations on a display screen of the remote control device, selects a channel from the channels of TV stations displayed on the display screen, and sends a control signal to control the television to change to a channel according to the selected channel.

Abstract: In a method for switching desktops of an electronic device, a plurality of desktop application groups and desktops are preset to corresponding preset position ranges. A current position of the electronic device is determined according to acquired position information from a global position system. When the electronic device is located in one of the preset position ranges, the method determines a position range that the current position is in, and determines a desktop application group and a desktop correspondingly. When the determined desktop is different from a current desktop of the electronic device, the method switches the current desktop to the determined desktop, and displays icons of the determined desktop application group on the determined desktop of the electronic device.

Abstract: An oscillating-foil type underwater propulsor with a joint provided in the invention, the propulsor including a streamline foil having a foil surface being parallel to a water surface and a span length of at least twice as long as an average chord length of the streamline foil, and a heaving mechanism undergoing heaving motion perpendicular to a propulsion direction of the propulsor and having a transmission section, wherein the transmission section is pivotally connected to the streamline foil to form a joint, the joint being provided at the middle of the span length and having a rotation center located within a circular area, which has a radius of one third of the average chord length and is centered at the point one third of the average chord length ahead of the lifting center of the streamline foil.

Abstract: A water-cooling radiator for a computer chip is provided to lower the temperature of the computer chip. The radiator includes a body on which other elements can be fixed and providing an interface for heat exchange, an internal circulation flow path built inside the body to provide a passage required for the coolant to flow through, and a pump fixed to the side of the body near the computer chip to provide power required for the coolant circulation.

Abstract: An oscillating-foil type underwater propulsor with a joint provided in the invention, the propulsor including a streamline foil having a foil surface being parallel to a water surface and a span length of at least twice as long as an average chord length of the streamline foil, and a heaving mechanism undergoing heaving motion perpendicular to a propulsion direction of the propulsor and having a transmission section, wherein the transmission section is pivotally connected to the streamline foil to form a joint, the joint being provided at the middle of the span length and having a rotation center located within a circular area, which has a radius of one third of the average chord length and is centered at the point one third of the average chord length ahead of the lifting center of the streamline foil.

Abstract: A water-cooling radiator for a computer chip is provided to lower the temperature of the computer chip. The radiator includes a body on which other elements can be fixed and providing an interface for heat exchange, an internal circulation flow path built inside the body to provide a passage required for the coolant to flow through, and a pump fixed to the side of the body near the computer chip to provide power required for the coolant circulation.