Abstract: A method for determining location of wireless network base station comprises obtaining a plurality of position information, wherein each one of the position information corresponds to one of the user devices; estimating received power estimation values in accordance with relative displacement between the user devices and each of the candidate locations; determining construction possibilities of the candidate locations, wherein each of the construction possibilities shows possibility of choosing a corresponding one of the candidate locations to be the place for building the wireless network base station, and sorting the candidate locations in accordance with the construction possibilities to form a predicting sequence; selecting a preset amount of candidate locations from beginning of the predicting sequence as a starting sequence; and performing an actual measuring operation in each candidate location listed in the starting sequence and determining the location for building the wireless network base station i

Abstract: A method for automatically changing a topology includes: activating a number (i) of network switches included in a stack, a last switch and first (i?1) network switches being included in the stack; deactivating one of the activated switches as a deactivated switch; decoupling the last switch from the other activated switches, and resetting the last switch; disabling settings of Link Aggregation Control Protocol (LACP) between the last switch and a switch device, disabling settings of LACP between the last switch and a neighboring device, and performing a reset configuration operation to reconfigure a connection setting between the last switch and the switch device and a connection setting between the last switch and the neighboring device; and establishing settings of LACP between the last switch and each of the network switches that is neither the deactivated switch nor the last switch.

Abstract: A light source angle-adjustment device is adapted to be disposed adjacent to a camera lens and includes a light-emitting member, a reflecting member, and a driving member. The light-emitting member has a light outlet. A light of the light-emitting member is emitted from the light outlet along a light path. The light outlet faces away from the camera lens and faces the reflecting member. The reflecting member is disposed in the light path of the light-emitting member. The reflecting member has a reflecting surface reflecting the light emitted by the light-emitting member. The driving member is connected to the reflecting member and drives the reflecting member to rotate around an axis to change an angle provided between the light path and the reflecting surface.

Abstract: A power supply system is adapted to supply a power to a load, is connected to a load sharing bus, and includes two power supply devices and a control device. The two power supply devices are connected in parallel to the load, respectively have a maximum power, and respectively output an output power to the load. The control device is electrically connected to the two power supply devices. When a controlling condition is met, one of the two power supply devices with the greatest maximum power adjusts the output power according to a controlling signal from the control device and a sharing signal from the load sharing bus, so that the two output powers of the two power supply devices are the same or similar.

Abstract: A method of measuring an offset of an optical axis of an imaging system is implemented by a computing device. The imaging system captures a reference central marker and two reference outer markers on a surface to obtain a captured central marker and two captured outer markers on an image. The imaging system is rotated by a target angle such that the captured central marker is located at a center point of the image. The method includes: obtaining an input of an FOV of the imaging system, and a pair of distances from the reference central marker to each of the reference outer markers, or to each of the captured outer markers; based on the FOV and the pair of distances, obtaining a value of the target angle; and obtaining the offset based on the value of the target angle and an EFL of the imaging system.

Abstract: A magneto-electric dipole antenna array includes a substrate and at least one antenna unit. Each of the at least one antenna unit includes an electric-dipole component, a magnetic-dipole component, a first feeding probe, a second feeding probe and a stripline. The electric-dipole component is disposed on an upper surface of the substrate. The magnetic-dipole component is disposed in the substrate and between the upper surface and a lower surface of the substrate, and is electrically connected to the electric-dipole component. The first feeding probe is disposed on the upper surface of the substrate for vertical polarization. The second feeding probe is disposed in the substrate and between the upper surface and the lower surface of the substrate for horizontal polarization. The stripline is disposed in the substrate and between the first feeding probe and the second feeding probe for capacitive coupling.

Abstract: An antenna includes a first substrate, a second substrate, a ground layer and a third substrate stacked from top to bottom, a driving patch disposed below the first substrate, and a first feed-in line and a second feed-in line disposed below the third substrate. The antenna further includes a first feed-out probe and a second feed-out probe, each of which extends from below the driving patch, and penetrates the second substrate, the ground layer and the third substrate. The first feed-out probe and the second feed-out probe respectively connects the first feed-in line and the second feed-in line to the driving patch, so as to transmit a first signal and a second signal received by the first feed-in line and the second feed-in line to the driving patch respectively through the first feed-out probe and the second feed-out probe for the driving patch to output an output electromagnetic wave.

Abstract: An antenna system includes a substrate, a metallic heat sink disposed above the substrate and including a body and a heat dissipation structure, and an antenna assembly. The heat dissipation structure is disposed on the body. The body has a recess portion recessed inwards from a peripheral edge of the body. The antenna assembly includes a microstrip and a radiating section. The microstrip is disposed on a surface of the substrate and is coupled to a signal source. The radiating section is connected to the body and is disposed in the recess portion. An end of the radiating section is disposed in a location adjacent to the microstrip. The radiating section is excited by the microstrip using a coupling mechanism.

Abstract: A liquid-cooling heat dissipation device includes a case, a floating heat spreader, and a retaining structure. A chamber is formed in the case. A main channel is formed in the chamber. A surface of the case is provided with a shallow groove formed by recessing and a retaining structure combining portion. A combining opening is formed in the shallow groove and communicates with the main channel. The floating heat spreader includes a base plate located in the shallow groove, an abutting plate connected to the base plate, and a plurality of fins connected to the base plate. The base plate and an inner wall of the shallow groove jointly clamp a seal ring. The fins pass through the combining opening and extend into the main channel. The retaining structure is combined with the retaining structure combining portion and engages with a peripheral edge of the base plate.

Abstract: A network switch testing device and a method for testing at least one network switch involve a central processing unit (CPU), an acceleration port that can be enabled with internal loopback and an access control list, and at least one transmission port connectable with at least one to-be-tested transmission port of the to-be-tested network switch(es). The acceleration port and the transmission port(s) are set to the same virtual local area network (VLAN). The CPU transmits at least one packet to the acceleration port. The acceleration port circulates therein the packet(s) through internal loopback and according to the access control list to make the packet(s) reach a predetermined line rate, and transmits the predetermined-line-rate-reaching packet(s) to the transmission port(s) through VLAN's flooding mechanism. The transmission port(s) transmits the predetermined-line-rate-reaching packet(s) to the to-be-tested transmission port(s).

Abstract: A vehicle radar system includes an antenna module, an RF module, and a signal processor. The antenna module includes at least one transmitting antenna and multiple receiving antennas. The RF module includes a transmitting segment that generates and transmits transmitting waves each carrying a transmitting signal, and a receiving segment that receives reflected waves and incorporates received signal carried by the reflected waves with the transmitting signal into a beat signal. The signal processor performs 2D-FFT on the beat signals to obtain estimated position information of the target object, determines whether a distance value of the estimated position information is greater than a preset distance threshold, and when it is determined that the distance value is greater than the preset distance threshold, perform two-dimensional Multiple Signal Classification (2D-MUSIC) on the estimated position information, so as to obtain an exact distance value and an exact angle value of the target object.

Abstract: A smart temperature control system of a network equipment includes a motherboard disposed on a plate of a case, wherein a cooling chip is disposed between the plate and a portion of the motherboard where a temperature-controlled member is disposed on. A system CPU controlling circuit on the motherboard receives an information of a real-time temperature and a model of the temperature-controlled member, and obtains an operating temperature range of the temperature-controlled member by comparing the information of the model of the temperature-controlled member received with different models of the temperature-controlled member in a memory.

Abstract: A substrate integrated waveguide having multiple substrate comprises a first substrate and a second substrate stacked with the first substrate, wherein metal layers are formed on opposite sides of the first substrate and opposite sides of the second substrate, a plurality of metal holes are formed between two metal layers of the same substrate to limit transmission paths of electromagnetic waves transmitted in the substrate, and areas having no metal therein are formed between the first and second substrates so that the electromagnetic waves could be transmitted between the first and second substrates thereby.

Abstract: An easily mountable device bracket assembly includes a first bracket having a side that can be provided with at least one mounting member, a second bracket, and a third bracket having a side that can be fixed to a device housing and at least one bent portion having an inner wall spaced apart from an outer wall of the third bracket to form a slide groove. At least one gap formed by the mounting member and the side of the first bracket forms another slide groove. The second bracket can extend into the another slide groove in a connecting direction to be connected with the first bracket. When the device mounted with the third bracket is placed into an open rack or rack-type cabinet, the slide groove is in contact with the first bracket, and the third bracket is connected to the first bracket slidingly along the connecting direction.

Abstract: A horizontally polarized omnidirectional multi-band antenna structure includes a substrate and two structurally-symmetric radiators, each being provided on a layout area on one of the two opposite sides of the substrate, and including a X-shaped primary microstrip line, four secondary microstrip lines, four primary stubs, four secondary stubs and four resonators. The primary microstrip line has four end points arranged with the secondary microstrip lines along different extending directions. The primary stubs extend along different directions from four sections of the primary microstrip line. Each secondary microstrip line is provided with one of the secondary stubs. Resonators are provided between four end points of the primary microstrip line and the primary stubs.

Abstract: A planar antenna is defined with a first axis having a first direction and a second direction opposite to the first direction and a second axis having a third direction and a fourth direction opposite to the third direction and includes a substrate having a surface on which a first radiation element, a first ground element, a second radiation element, and a second ground element are disposed. An end of a first main section of the first radiation element is for being fed with a signal. The first ground element is on a side of the first radiation element in the second direction. The second radiation element is on a side of the first main section in the third direction. The second ground element is on a side of a second main section of the first ground element in the third direction.

Abstract: A liquid-cooling heat dissipation device includes a case having a chamber. At least one cooling fin is disposed in the chamber. A bottom case has at least one opening matching a number of the at least one cooling fin. The at least one cooling fin has a thermal bump protruding from the opening. A side of a periphery of the thermal bump has a guiding portion. A first seal ring is disposed between the cooling fin and a periphery of the opening. An elastic assembly which drives the at least one cooling fin to return to an original position after moving is disposed on the bottom case. When the present invention is used, the case is connected to a liquid pipeline for heat dissipation and the thermal bump of the at least one cooling fin contacts a heat source.

Abstract: A light source angle-adjustment device is adapted to be disposed adjacent to a camera lens and includes a light-emitting member, a reflecting member, and a driving member. The light-emitting member has a light outlet. A light of the light-emitting member is emitted from the light outlet along a light path. The light outlet faces away from the camera lens and faces the reflecting member. The reflecting member is disposed in the light path of the light-emitting member. The reflecting member has a reflecting surface reflecting the light emitted by the light-emitting member. The driving member is connected to the reflecting member and drives the reflecting member to rotate around an axis to change an angle provided between the light path and the reflecting surface.

Abstract: A circuit system for digitally regulating direct-current fan rotation speed includes a parallel data generator circuit, a trapezoidal resistor network circuit, a current amplifier circuit, a linear voltage-controlled resistor circuit, and a fan power converter circuit. The parallel data generator circuit can receive control data and generate corresponding digital parallel data. The trapezoidal resistor network circuit can receive the parallel data and transfer it into a corresponding analog current signal. The current amplifier circuit can receive the current signal and convert it into a corresponding voltage signal. The linear voltage-controlled resistor circuit can receive the voltage signal and generate a corresponding resistance signal according thereto.

Abstract: A radome and a radar device using the radome are provided. The radome is made of a dielectric material. A thickness of the dielectric material is first increased and then decreased along a radial direction extending from a center to an outer edge of the radome. The radar device includes the radome and an antenna transmitting or receiving electromagnetic waves passing through the radome.