Abstract: An indoor positioning method based on image visual features is disclosed. A Wi-Fi signal strength value of a Wi-Fi tag is matched with a signal strength list to obtain a first location of a first Wi-Fi tag with the greatest matching degree. A SURF descriptor of an image of the Wi-Fi tag is matched with SURF descriptors recorded in the signal strength list to discover an image of a Wi-Fi tag with the greatest matching degree, thereby obtaining a second location of a second Wi-Fi tag corresponding to the image of the Wi-Fi tag with the greatest matching degree. A three location of a three Wi-Fi tag is obtained according to a homography matrix corresponding to the image of the Wi-Fi tag with the largest matching degree. Positioning information of the mobile device is obtained according to the first location, the second location and the third location.

Abstract: A system and method for managing and controlling power of base station when a connectable terminal device is moving at speed through the coverage area of the base station, the method obtains a transmission power from a terminal through the base station; obtains location of the terminal, and generates a transmission power conversion table according to the terminal transmission power and the terminal location. The transmission power conversion table is transmitted to the terminal by the base station, the transmission power being used by the terminal according to the transmission power conversion table, avoiding repeated communications and electrical energy cost between base station and terminal in respect of the changing location of the terminal.

Abstract: A system and method for video compression divides colors of all pixel points of a target video frame into R, G, and B values, and all pixels are placed in a three-dimensional coordinate system to establish a correspondence between each pixel point and the coordinate position. Fuzzy recombination and division are performed on all pixel blocks and pixel points with similar RGB values are divided into pixel blocks to obtain a first target pixel block. Pixel blocks with same RGB values but with coordinates which are not close to the first target pixel block are extracted and divided to obtain a second target pixel block. An area enveloping the second target pixel block is extracted, and vector changes of all dynamic pixel points on the enveloping line are traversed and analyzed to determine a minimum compression change block for compression process.

Abstract: A communication system based on DOCSIS protocol includes a server, configured to send a signal and demodulate a received signal; a coaxial cable, configured to transmit signals through a coaxial cable network; a frequency divider, configured to divide the signal sent by the server into a downstream signal and a full duplex signal; a downstream communication path, configured to transmit the downstream signal to a first modulation and demodulation unit; an upstream communication path, configured to transmit a upstream signal sent by a second modulation and demodulation unit to the server; a full duplex communication path, configured to simultaneously transmit the downstream signal divided by the frequency divider and the upstream signal, separate the downstream signal from the full duplex signal and transmit to the first modulation and demodulation unit, and transmit the upstream signal sent by the second modulation and demodulation unit to the server.

Abstract: A method and system for accelerating the analysis of large-scale data reads a data packet from a queue, and after performing data processing on the data packet, a first high, middle, and low byte of the processed data packet is cyclically read; a preset signal reference value is read, and the signal reference value is converted into a collected value according to a preset signal transformation ratio and correction factor; the collected value is converted into an integer value, and the integer value is split into a second high, middle, and low byte; and the first high, middle, and low byte of the processed data packet is compared with the second high, middle and low byte of the integer value in a preset way. A determination as to whether the data of the packet is abnormal or not is made based on the result of the comparison.

Abstract: A smart antenna switching method is disclosed. Multiple wireless signal parameters of a wireless network environment are collected. Under a current operating phase, when a holding period of a to-be-switched antenna is 0, the qualities of wireless signals between an initial antenna and the to-be-switched antenna are compared according to the wireless signal parameters. When a comparing period of the to-be-switched antenna is 0, it is determined whether an antenna switching operation is performed. If the antenna switching operation is not performed, the next operating phase is served as the current operating phase. If the antenna switching operation is performed, a signal receiving-and-sending operating is switched from the to-be-switched antenna to the outdoor antenna or from the outdoor antenna to the to-be-switched antenna, and the previous operating phase is served as the current operating phase.

Abstract: A device for the rapid and convenient mounting of an electronic product on a supporting rack includes a holding rack, an engaging element, and a lock mechanism. A holding plate of the holding rack engages a first edge of the supporting rack, and holds the electronic product. An extension plate with first position and second position holes is connected to the holding plate, and the engaging element can pivot on the holding plate. The lock mechanism disposed on the engaging element can be selectively inserted into the first position hole and the second position hole. When the electronic product is mounted on the supporting rack, the lock mechanism is inserted into the first position hole, the holding plate is engaged with the first edge, and the engaging element is engaged to a second edge of the supporting rack.

Abstract: In a method for configuring and managing a Time Sensitive Networking (TSN) network, a network packet is regularly captured and parameters are extracted. The parameters are submitted to a distributed learning model for matching an application according to the parameters, and a network requirement of the application is obtained. Such obtained network requirements are uploaded to a centralized network configuration (CNC) through a message transmission protocol, and a configuration of the network requirement is calculated through the CNC. The configuration calculated by the CNC is received and delivered to a TSN switch, causing the TSN switch to dynamically update the network configuration accordingly.

Abstract: A branch-line coupler, adapted to radio frequency circuits, includes an input port, a first output port, a second output port, an isolated port, a first transmission line, a second transmission line, a first bent branch line, and a second bent branch line. The first transmission line is electrically connected between the input port and the first output port, and carries two open branches. The second transmission line is electrically connected between the isolated port and the second output port, and carries two open branches. The first bent branch line is electrically connected between the input port and the isolated port. The second bent branch line is electrically connected between the first output port and the second output port. The open branches of the first transmission line and the second transmission line resemble the bone structure of a fish skeleton.

Abstract: An electronic apparatus with a cooling system includes a chassis having a mounting slot, and a removable device. The removable device includes a housing detachably disposed in the mounting slot; a first pump disposed in the housing, and detachably affixed to a bottom of the housing; a second pump detachably affixed to the bottom of the housing, and connected to the first pump; and a tank disposed on the first pump and configured to store cooling liquid. when the first pump or the second pump is operating, the cooling liquid in the tank flows into the first pump, and the cooling liquid in the first pump flows into the second pump.

Abstract: A beam tracking method for mmWave communication method is disclosed. An angle estimation algorithm is performed on all user equipments (UEs) through a low-frequency band to estimate beam angles of the UEs relative to the electronic device. High-frequency band beams of the UEs relative to the electronic device are generated according to the estimated beam angles. The electronic device is enabled to communicate with the UEs according to the generated high-frequency band beams.

Abstract: A method and system for accelerating analysis of large-scale data that reads a data packet from a queue, and after performing data processing on the data packet, a first high, middle, and low byte of the processed data packet is cyclically read; a preset signal reference value is read, and the preset signal reference value is converted into a collected value according to a preset signal transformation ratio and a correction factor; the collected value is converted into an integer value, and the integer value is split into a second high, middle, and low byte; and the first high, middle, and low byte of the processed data packet is compared with the second high, middle and low byte of the integer value in a preset way. A determination as to whether the data of the packet is abnormal or not is made based on the result of the comparison.

Abstract: A method of controlling a battery-powered remote controller to decrease a duty cycle to allow continued operations despite the quantity of the battery is bad determines a drop in voltage of the battery in standby mode as voltage of the battery is being read. When receiving a command to activate a voice function, determining whether the drop in voltage in standby mode is greater than or equal to a preset value. If yes, the method then determines whether the drop in voltage falls in a preset range. If yes, the method regulates a duty cycle of the pulse signal activating the voice function, and activates the voice function as required. A remote controller and a non-transitory storage medium are also provided.

Abstract: An antenna device, applied to an electronic device and the antenna device includes: an antenna unit, configured to transmit and receive signals; a rotation unit, connected to the antenna unit, and configured to rotate the antenna unit when the electronic device is powered on, record a signal strength in preset angle for each rotation and generate an angle and signal strength mapping table, and further configured to rotate the antenna unit to a position with a strongest signal according to the angle and signal strength mapping table, which realizes automatic adjustment of antenna direction to optimize antenna performance.

Abstract: A method for enhancing uplink and downlink coverage is applied in a base station for the benefit of a terminal user. The base station receives from the user terminal an uplink scheduling request and GPS location. In response, the base station determines a penetration loss level of the GPS location, the penetration loss being attenuation of signals when signals penetrate an outer structure of a building. The base station further determines a transmission frequency of the uplink according to the penetration loss level which is set by reference to base station Tables of penetration loss for buildings and areas within its coverage area, and generates a scheduling strategy comprising the transmission frequency of the uplink, sending the scheduling strategy including the transmission frequency of the uplink to the user terminal for use in intercommunication.

Abstract: A mounting mechanism for a server or other electronic apparatus allowing the addition of modules or devices of different sizes includes a casing having an opening. A guiding track is disposed in the casing; a slide bar is movably disposed on the guiding track; a restriction structure is disposed on the first end of the guiding track; and a locking structure can pivot on the restriction structure. When the casing is mounted on a rear rack, the slide bar is moved out of the casing via the opening, and the restriction structure and the locking structure are securely fastened to the frame.

Abstract: A heat-dissipation device with detachability against the adhesion of a paste includes a heat-dissipation structure and a detachment device. The heat-dissipation structure installed on a heat-generating component includes a base, and a heat-dissipation element disposed on the base, and a through hole penetrating through the base. The detachment device includes a housing disposed on the base and covering the through hole, wherein the housing includes a gas chamber, and a gas hole connected to the gas chamber, the gas hole being in communication with the through hole. An adjustment element is movably disposed in the gas chamber. A gas in the housing is pushed out through the gas hole by moving the adjustment element downwards, creating a positive gas pressure and thus forcing a separation between the heat-dissipation structure and the heat-generating component on which the structure is installed.

Abstract: A three-dimensional (3D) sound localization method, comprising: evaluating distances between a target object and multiple microphones; distinguishing a quadrant in which the target object is located; evaluating multiple elevation angles and azimuth angles of the target object according to spatial coordinates of each of the microphones; setting searching intervals of distance variables between the target object and each of the microphones; generating multiple test points according to the elevation angles, the azimuth angles and the searching intervals of the distance variables; calculating fitness of each of the test points; obtaining fitness values of each of the test points and comparing the fitness values between each of the test points; and, when a convergence condition is reached according to the fitness values, generating a positioning result of the target object.

Abstract: An electronic apparatus with convenient airflow-reversing function includes a chassis, a rotation mechanism, a fan device, a connection rod, and a handle. The chassis includes a bottom plate. The rotation mechanism is pivoted on the bottom plate. The fan device is disposed on the rotation mechanism. The connection rod is pivoted on the rotation mechanism. The handle is pivoted on the chassis, and is rotatably connected to the connection rod. When the handle is rotated, the connection rod drives the rotation mechanism and the fan device to rotate to change the airflow direction.

Abstract: An indoor positioning method based on image visual features. A Wi-Fi signal strength value of a Wi-Fi tag closest to a current location of a mobile device is matched with a signal strength list in a map database to obtain a first location of a first Wi-Fi tag with the greatest matching degree. A SURF descriptor of an image of the Wi-Fi tag closest to the current location of the mobile device is matched with SURF descriptors recorded in the signal strength list in the map database to discover an image of a Wi-Fi tag with the greatest matching degree, thereby obtaining a second location of a second Wi-Fi tag corresponding to the image of the Wi-Fi tag with the greatest matching degree. A three location of a three Wi-Fi tag is obtained according to a homography matrix corresponding to the image of the Wi-Fi tag with the largest matching degree and an empirical value of a positioning error.