Abstract: A signal transmission method and an apparatus. A terminal obtains first information, and sends a signal corresponding to a first pilot pattern or a second pilot pattern. The first information is usable to indicate the terminal to use the first pilot pattern or the second pilot pattern. The first pilot pattern is usable to that a first reference signal is located at a first time domain position, and a second reference signal is located at a second time domain position. The second pilot pattern is usable to indicate that a third reference signal is located at the first time domain position, and a fourth reference signal is located at a third time domain position.

Abstract: This application provides a method and an apparatus for sending feedback information and a method and an apparatus for receiving feedback information, to reduce resource waste in a data retransmission process.

Abstract: A method includes a transmitting end sending a first signal that includes a data signal and a reference signal. A first imaginary reference signal in the reference signal is located at a real signal location of the first signal, and/or a first real reference signal in the reference signal is located at an imaginary signal location of the first signal; and the reference signal is used for phase noise estimation.

Abstract: A method includes generating a data signal based on data, scrambling the data signal with a pseudo-random signal thereby generating a scrambled data signal, generating an amplitude shift keying (ASK) signal based on the scrambled data signal, and transmitting, by a transceiver, the ASK signal.

Abstract: Embodiments of this application provide a communication method and apparatus. In the method, the first communication apparatus may receive a first message, where the first message includes information about an expansion factor. The first communication apparatus determines a quantity of information bits based on the expansion factor, generates a to-be-sent signal based on the quantity of information bits; and transmits the to-be-sent signal. During communication, the communication apparatus uses the expansion factor in transmission, so that the quantity of information bits transmitted in a filter can be increased, to ensure high spectrum utilization and high data transmission efficiency.

Abstract: An electronic device includes an enclosure, a bracket, a connector, and a fan. The enclosure includes a bottom plate and two side plates located on the bottom plate. The bracket is secured to the side plates and includes a bottom wall. The bottom wall is substantially parallel to the bottom plate and defines an installing opening. Two locking pieces extend from two opposite edges of the installing opening. Each of the locking pieces defines a locking hole. The connector is secured in the installing opening, the connector comprising two resilient portions. A locking protrusion protrudes from each of the resilient portions. The locking protrusions of the resilient portions engage in the locking holes of the locking pieces. The resilient portions are deformable to disengage the locking protrusions from the locking holes. The fan is received in the bracket and adapted to be electrically coupled to the connector.

Abstract: An electronic device includes an enclosure, a bracket, a connector, and a fan. The enclosure includes a bottom plate and two side plates located on the bottom plate. The bracket is secured to the side plates and includes a bottom wall. The bottom wall is substantially parallel to the bottom plate and defines an installing opening. Two locking pieces extend from two opposite edges of the installing opening. Each of the locking pieces defines a locking hole. The connector is secured in the installing opening, the connector comprising two resilient portions. A locking protrusion protrudes from each of the resilient portions. The locking protrusions of the resilient portions engage in the locking holes of the locking pieces. The resilient portions are deformable to disengage the locking protrusions from the locking holes. The fan is received in the bracket and adapted to be electrically coupled to the connector.

Abstract: A laser nanoforming system and method for forming three-dimensional nanostructures from a metallic surface. A laser beam is directed to hit and explode an ablative layer to generate a shockwave that exerts a force on the metallic surface to form an inverse nanostructure of an underlying mold. A dry lubricant can be located between the metallic surface and mold to reduce friction. A confinement layer substantially transparent to the laser beam can confine the shockwave. A cushion layer can protect the mold from damage. A flyer layer between the ablative layer and metallic surface can protect the metallic surface from thermal effects of the exploding ablative layer. The mold can have feature sizes less than 500 nm. The metallic surface can be aluminum film. The dry lubricant can be sputtered Au—Cr film, evaporated Au film or a dip-coated PVP film or other dry lubricant materials.

Abstract: A computer system includes an enclosure, a printed circuit board, and an air duct. The enclosure comprises a bottom panel, a rear panel, and a mounting panel. The printed circuit board is mounted on the bottom panel and is located between the rear panel and the mounting panel. A plurality of expansion cards is inserted in the printed circuit board. The plurality of expansion cards is substantially parallel to each other. The air duct is placed on the rear panel and the mounting panel. The air duct comprises an air duct body and a guiding plate. The guiding plate comprises a securing portion secured to the air duct body and a plurality of bent elastic tabs extending from the securing portion at an angle. The plurality of bent elastic tabs resists the plurality of expansion cards, thereby guiding air to flow to the plurality of the expansion cards.

Abstract: A laser nanoforming system and method for forming three-dimensional nanostructures from a metallic surface. A laser beam is directed to hit and explode an ablative layer to generate a shockwave that exerts a force on the metallic surface to form an inverse nanostructure of an underlying mold. A dry lubricant can be located between the metallic surface and mold to reduce friction. A confinement layer substantially transparent to the laser beam can confine the shockwave. A cushion layer can protect the mold from damage. A flyer layer between the ablative layer and metallic surface can protect the metallic surface from thermal effects of the exploding ablative layer. The mold can have feature sizes less than 500 nm. The metallic surface can be aluminum film. The dry lubricant can be sputtered Au—Cr film, evaporated Au film or a dip-coated PVP film or other dry lubricant materials.

Abstract: A panel assembly includes a panel (10) having a light-pervious area (142), a light source (60) attached on the panel for lighting the light-pervious area, a variable resistor (30) electrically connected in series with the light source, and a rotating member (40) rotatably attached on the panel, the rotating member is engagingly coupled to the variable resistor and is manually rotatable in a manner that a resistance of the variable resistor is adjusted accordingly.

Abstract: A personal data assistant (PDA) carrying case includes a main body (10), an expansion cover (40) having a first clasp (46) extending therefrom, a resilient clip (22) mounted on the main body, and a button (29). An opening (33) is defined in the main body for matching the expansion cover. A locking edge (36) is formed for engaging with the first clasp. A through hole (24) is defined in main body corresponding to the first clasp. The resilient clip has a projecting portion (222) corresponding to the through hole. The resilient clip deforms elastically to have the projecting portion pressing the button, so that the button drives the first clasp to disengage the first clasp from the locking edge of the main body.

Abstract: A PDA carrying device includes a base body (20), a front panel (10) and rear cover (30). The base body is used to hold a PDA. The front panel is pivotably attached to the base body. The rear cover is mounted on the base body. The base body has a plurality of hermetic flanges engaging with the front panel and the rear cover respectively.

Abstract: A panel assembly for reflecting and shielding rays of a light source, includes a panel, a light-reflecting member attached to the panel, and a light-shielding board received in the light-reflecting member. The panel includes a base and a bent plate perpendicular to the base. A light-pervious board is disposed on the panel. The light-reflecting member defines an opening opposite to the light pervious mechanism, for reflecting some rays on the light-pervious mechanism through the opening. Wherein the light-shielding board is manipulated to move along a direction vertical to the light-reflecting member. When the light-shielding board is positioned in an upper position, the opening of the light-reflecting member is exposed to allow rays through the light-pervious board. When the light-shielding board is positioned in a lower position, the opening of the light-reflecting member is covered, and no rays are reflected to the light-pervious board.

Abstract: A light guiding apparatus for a computer bezel includes a panel (14), a guiding member (30), and a shielding member (50). The panel has a light-pervious member (144). The guiding member is attached to the panel for guiding light therein. The guiding member has a light-reflecting cavity with a mouth (37) coupled to the light-pervious member. The shielding member is situated between the panel and the light-pervious member. The shielding member includes a shielding board (56) for covering the mouth, and an axle (54) traverses the shielding board. The shielding member is pivotable with respect to the guiding member between a closed position where the shielding member is horizontal to cover the mouth and an open position where the shielding member is vertical to reveal the mouth.

Abstract: A panel assembly includes a panel (10) having a light-pervious area (142), a light source (60) attached on the panel for lighting the light-pervious area, a variable resistor (30) electrically connected in series with the light source, and a rotating member (40) rotatably attached on the panel, the rotating member is engagingly coupled to the variable resistor and is manually rotatable in a manner that a resistance of the variable resistor is adjusted accordingly.

Abstract: A computer enclosure includes a base (10), a securing member (30) and a bracket (50). A through hole (164, 184) is defined in the base. The securing member secured to base. A guiding groove (32) is defined in the securing member. The bracket is attached to the base, and has a latching tab (534, 544) and a post (536, 566). During engaging of the latching tab in the through hole of the base, the latching tab presses against an edge of the though hole. The bracket is thereby driven to slide forward on the base, with the post engaging in the guiding groove of the securing member. The bracket is thus secured to the base.

Abstract: A light guiding apparatus for a computer bezel includes a panel (14), a guiding member (30), and a shielding member (50). The panel has a light-pervious member (144). The guiding member is attached to the panel for guiding light therein. The guiding member has a light-reflecting cavity with a mouth (37) coupled to the light-pervious member. The shielding member is situated between the panel and the light-pervious member. The shielding member includes a shielding board (56) for covering the mouth, and an axle (54) traverses the shielding board. The shielding member is pivotable with respect to the guiding member between a closed position where the shielding member is horizontal to cover the mouth and an open position where the shielding member is vertical to reveal the mouth.

Abstract: A panel assembly includes a front panel (10), and a light-reflecting member (40) attached to the front panel. A light-pervious mechanism (144) is disposed on the front panel. The light-reflecting member has a hollow body. A light source (30) is accommodated in the hollow body. A through opening (48) is defined in the hollow body for coupling with the light-pervious mechanism of the front panel. Some rays of the light source are reflected by the light-reflecting member, and shine on the light-pervious mechanism through the through opening.

Abstract: A panel assembly for reflecting and shielding rays of a light source, includes a panel, a light-reflecting member attached to the panel, and a light-shielding board received in the light-reflecting member. The panel includes a base and a bent plate perpendicular to the base. A light-pervious board is disposed on the panel. The light-reflecting member defines an opening opposite to the light pervious mechanism, for reflecting some rays on the light-pervious mechanism through the opening. Wherein the light-shielding board is manipulated to move along a direction vertical to the light-reflecting member. When the light-shielding board is positioned in an upper position, the opening of the light-reflecting member is exposed to allow rays through the light-pervious board. When the light-shielding board is positioned in a lower position, the opening of the light-reflecting member is covered, and no rays are reflected to the light-pervious board.