Abstract:
An antenna system applicable to a mobile communication device is provided in the present disclosure. The antenna system includes a metal shell with a metal frame and a metal back cover, a printed circuit board (PCB) housed in the metal shell, and an antenna part with a first feed point and a second feed point. A first break point and a second break point are formed at two opposite sides of the metal frame; a first gap and a second gap are respectively formed at two opposite sides of the metal back cover for defining a first clearance area and a second clearance area. The first feed point is located in the first clearance area and contacts a left frame portion of the metal frame; the second feed point is located in the second clearance area and contacts a right frame portion of the metal frame.
Abstract:
An antenna system with a full metal back cover is provided in the present disclosure. The antenna system includes a metal back cover with a main body, a first sidewall and a second sidewall opposite to each other, a circuit board with a main ground point, a first antenna module and a second antenna module electrically connected to the circuit board. A first gap is formed between the first sidewall and the main body, and a second gap is formed between the second sidewall and the main body; the metal back cover is divided into a first metal portion including the first sidewall and a second metal portion including the second sidewall. The first metal portion includes a top slit penetrating through an edge of the first sidewall, and the second metal portion includes a bottom slit penetrating through an edge of the second sidewall.
Abstract:
An antenna module applicable to a mobile device is provided in the present disclosure. The antenna module includes a metal frame, a circuit board surrounded by the metal frame, and an antenna portion on the circuit board. The circuit board includes a main board and a ground board placed on the main board. The antenna portion includes at least one low frequency (LF) ground point and at least one high frequency (HF) ground point arranged on the ground board, and a feed point arranged on the main board. The at least one LF ground point and the at least one HF ground point contact the metal frame; a first current path length between the feed point and the at least one LF ground point is greater than a second current path length between the feed point and the at least one HF ground point.
Abstract:
The present disclosure provides an antenna and an electronic device using same. The antenna includes an antenna radiating element for radiating signals, a capacitive feed plate separated from and substantially parallel to the antenna radiating element for carrying out capacitive feed on the antenna radiating element, and a FPC antenna electrically connecting with the capacitive feed plate for feeding for the capacitive feed plate. The FPC antenna includes a plate-shaped main body, a feeding end, a ground end, an extending portion for being electrically connected with the capacitive feed plate, and a feeding strip extending vertically from the extending portion for improving the low-frequency performance of the antenna.
Abstract:
A hierarchal view preserving relationships between data is generated by storing information related to sales and investment. The information includes dimensions and each of the dimensions includes a level and each of the levels is described by variables. Relationships between the variables are also stored. A request for a hierarchy is received. The requested hierarchy includes a set of dimensions from the stored dimensions, a level for each dimension in the set, and a sequence of the dimensions or levels in the hierarchy. A computer system calculates values for the variables in the levels for the requested hierarchy using the stored relationships that are applicable to the variables in the levels. A view of the hierarchy is generated and includes the calculated values. The view also includes the dimensions or levels of the requested hierarchy in the sequence specified for the requested hierarchy.
Abstract:
A codebook based channel information feedback method, device and system are provided in the present invention. The codebook based channel information feedback method includes: measuring, by a terminal in a communication system, a parameter of a downlink channel between the terminal and a base station of the communication system; selecting a plurality of precoding matrixes from a precoding codebook by using the parameter of the downlink channel, wherein a plurality of the precoding matrixes can be used by both of single-user multi-input multi-output (MIMO) transport mode and multi-user MIMO transport mode, and the precoding codebook is an aggregation of precoding matrixes; and feeding back a first information for indicating a plurality of the precoding matrixes to the base station.
Abstract:
A projector to which a ceiling suspension attachment is fixed. The projector accommodates an internal device. The projector is provided with an outer case including a bottom wall that defines an outer bottom surface and an inner bottom surface of the outer case. Insert nuts are arranged on the bottom wall. Each insert nut includes a threaded hole to which a first coupling screw is fastened and a second coupling screw can be fastened. The first coupling screw couples the attachment to the outer bottom surface of the bottom wall, and the second coupling screw is fastened to the threaded hole from a side opposite to the first coupling screw. The second coupling screw is fastened at least one of the insert nuts to couple the inner device to the inner bottom surface of the bottom wall.
Abstract:
The invention relates to a vehicle headlight cleaning apparatus. A main body of the cleaning apparatus is of a cylindrical structure and internally provided with a compression spring and a movable seal valve which is matched with the inner wall of a casing of the cleaning apparatus. Both ends of the spring are respectively fixed on the end part of the cleaning apparatus and a spring fixing seat of the movable seal valve. When cleaning solution flows in the cleaning apparatus through a cleaning solution inlet on a base, the pressure of the cleaning solution overcomes the spring force of the compression spring and drives a transmission guide rod, the movable seal valve and a nozzle to move together, and the transmission guide rod stops when moving to a limit position. The pressure of the cleaning solution increases continuously, then the movable seal valve is opened under the pressure of the cleaning solution, the cleaning solution sprays out through the transmission guide rod and the nozzle, and a complete cleaning circuit is formed. When cleaning is finished, the pressure of the cleaning solution disappears, the movable seal valve is closed under the function of the compression spring, the transmission guide rod retracts into the casing till to an initial position, and the whole cleaning is finished. The invention has small and exquisite appearance, light weight, reliable work and high cleaning efficient.
Abstract:
Provided herein are methods and systems for designing a radiation treatment for a subject using single arc dose painting. The methods and systems comprise an algorithm or a computer-readable product having the same, to plan the radiation treatment. The algorithm converts pairs of multiple leaf collimation (MLC) leaves to sets of leaf aperture sequences that form a shortest path single arc thereof where the pairs of MLC leaves each aligned to an intensity profile of densely-spaced radiation beams, and connects each single arc of leaf apertures to form a final treatment single arc. Also provided is a method for irradiating a tumor in a subject using single arc dose painting.
Abstract:
A system and method for predictive analysis includes generating an execution trace on an instrumented version of source code for a multithreaded computer program. Interleavings which potentially lead to a violation in the program are statically generated by performing a static predictive analysis using a Universal Causality Graph (UCG) to generate alternative interleavings that might lead to an error. The UCG includes a unified happens-before model for the concurrent program and a property being analyzed. The interleavings are symbolically checked to determine errors in the program.