Abstract: A power supply circuit includes first to third electronic switches, first to sixth resistors, and a first capacitor. The power supply circuit is coupled to a USB interface. A control terminal of the first electronic switch is utilized to receive a control signal. A first terminal of the first electronic switch is coupled to a standby power supply. The standby power supply is also coupled to ground through the first capacitor. The second electronic switch is coupled to the first electronic switch. The third electronic switch is coupled between the second electronic and the USB interface. The disclosure further provides an electronic device having the circuit.

Abstract: To adjust a transmit power for device-to-device communication, a user equipment which performs the device-to-device communication using the transmit power detects that the user equipment enters a coverage area of a radio communication unit. The transmit power of the user equipment for the device-to-device communication is decreased in response to detecting that the user equipment enters the coverage area of the radio communication unit.

Abstract: A method is described for producing an amended realization of a geostatistical model of a hydrocarbon reservoir using the Karhunen-Loève (KL) expansion. The KL expansion may be used to produce amended realizations for history matching and is widely used. However, it is necessary in order to use the KL expansion to perform singular value decomposition of the covariance matrix of the model to provide eigenvectors and eigen values for use in the expansion. In a typical geostatistical model, the covariance matrix is too large for singular value decomposition to be performed. Prior solutions to this problem involved reducing the resolution of the model so as to reduce the size of the covariance matrix. In the method described, a plurality of random realizations are generated and an approximation of the covariance matrix is constructed from the realizations, the approximation matrix having smaller dimensions than the true covariance matrix.

Abstract: Aspects of the present disclosure relate to controlling the functions of various devices based on spatial relationships. In one example, a system may include a depth and visual camera and a computer (networked or local) for processing data from the camera. The computer may be connected (wired or wirelessly) to any number of devices that can be controlled by the system. A user may use a mobile device to define a volume of space relative to the camera. The volume of space may then be associated with a controlled device as well as one or more control commands. When the volume of space is subsequently occupied, the one or more control commands may be used to control the controlled device. In this regard, a user may switch a device on or off, increase volume or speed, etc. simply by occupying the volume of space.

Abstract: A computer system includes a power supply unit (PSU), a matching circuit, and a chip. The matching circuit includes a voltage conversion unit, a voltage-dividing unit, a first resistor, a comparator, a diode, and a delay unit. The comparator includes a non-inverting terminal electrically coupled to the PSU to receive a power-good signal, an inverting terminal electrically coupled to the voltage-dividing unit to receive a reference voltage, and an output terminal. The delay unit is electrically coupled to a power supply and a power-good signal pin of the chip. When a voltage of the power-good signal is greater than the reference voltage, the output terminal of the comparator outputs a high level signal, the diode is turned off and the power supply is delayed by the delay unit and then output to the power-good signal pin of the chip.

Abstract: A power circuit for an electronic device includes an input terminal, an output terminal, a voltage transform unit, and a control unit. The control unit controls the voltage transform unit to operate or not operate, according to the input terminal receives a first voltage or a second voltage. The first voltage is transformed to an output voltage, and is output by the output terminal, when the input terminal receives the first voltage. The second voltage is transmitted from the input terminal to the output terminal through the third switch unit, when the input terminal receives the second voltage. Therefore, the power circuit can receive the first voltage or the second voltage through the input terminal, and outputs the output voltage to other electronic components.

Abstract: A control method for constant airflow controlled by a direct power-controlled PM motor, wherein the PM motor is installed in an HVAC system to drive the rotation of a fan wheel, and wherein the PM motor has a stator component, permanent magnet rotor components, and a motor controller. In some embodiments, the motor controller includes an operation parameters sensing circuit and a microprocessor.

Abstract: A method for increasing rotational speed range of an ECM motor, including: 1) starting the motor and initializing parameters; 2) reading the rotor position signal from the hall sensor by the microprocessor and updating the rotor angle; 3) reading the DC bus current I and the rotational speed n of the motor; 4) inputting a target rotational speed S from an external device, acquiring the target rotational speed S by the microprocessor, calculating the rotational difference e, and utilizing a rotational speed PI regulator to output a regulating parameter V_D; 5) calculating an advance angle ?=F(I, n) by the microprocessor, and calculating a real-time angle of the rotor ?=?×t by the microprocessor; and 6) calculating a PWM signal input into the inverter circuit, and outputting a PWM chopper voltage U by the inverter circuit, where U=F(V_D, ?+?).

Abstract: A heat-dissipation structure for a motor controller. The heat-dissipation structure includes a control box, a circuit board, a plurality of radiators, and IGBT modules. The circuit board is installed in the control box. Each radiator includes a side plate and a heat dissipation block protruding from the side plate. The side plate is attached to an inner wall surface of the control box. The IGBT modules are installed on the heat dissipation block, and the pin terminals protruding from the IGBT modules are in electric or electronic connection with the circuit board.

Abstract: Disclosed are a quantum key distribution terminal and system. An optical transceiving device and an electronics media board in a quantum key distribution system are organically integrated into a whole through an electronics back panel. A quantum key distribution terminal with a compact structure and a high integration level is provided, so that uniform testing, maintenance and management for various components in the quantum key distribution system can be realized, thereby realizing the integration and terminalization of the key distribution system. The same quantum key distribution terminal can also be used to conduct flexible networking, thereby setting up a quantum key distribution system on a point to point, local area network or metropolitan area network scale.

Abstract: An alarm circuit includes an audio chip, a basic input and output system (BIOS), a platform controller hub (PCH), and a speaker unit. The audio chip is electrically coupled to the BIOS, the PCH, and the speaker unit. The audio chip receives control signals from the BIOS and the PCH, and controls the speaker unit to alarm according to the control signals.

Abstract: A power supply circuit includes first to third electronic switches, first to sixth resistors, and a first capacitor. The power supply circuit is coupled to a USB interface. A control terminal of the first electronic switch is utilized to receive a control signal. A first terminal of the first electronic switch is coupled to a standby power supply. The standby power supply is also coupled to ground through the first capacitor. The second electronic switch is coupled to the first electronic switch. The third electronic switch is coupled between the second electronic and the USB interface. The disclosure further provides an electronic device having the circuit.

Abstract: The present invention is related generally to embryonic-like stem cells isolated from human umbilical cord blood, designated herein as cord blood-stem cells (CB-SC's), which display the characteristics of embryonic stem cells and hematopoietic cells. These cells have the capability of proliferation and are able to differentiate to multiple types of cells. In addition, the CB-SC display low immunogenicity and immune regulation. These cells are, therefore, suitable for use in stem cell-based therapies for the treatment of diseases such as Parkinson's disease, diabetes, spinal cord damage, multiple sclerosis, cardiovascular disease, stroke and birth defects, and for preventing, treating and/or reducing an autoimmune disease in a mammalian subject.

Abstract: Systems and techniques are disclosed for visually rendering a requested scene based on a virtual camera perspective request as well as a projection of two or more video streams. The video streams can be captured using two dimensional cameras or three dimensional depth cameras and may capture different perspectives. The projection may be an internal projection that maps out the scene in three dimensions based on the two or more video streams. An object internal or external to the scene may be identified and the scene may be visually rendered based on a property of the object. For example, a scene may be visually rendered based on where an mobile object is located within the scene.

Abstract: The disclosure provides a power supply circuit including a pulse width modulator (PWM), a first voltage conversion unit, a second voltage conversion unit, a conversion chip, and a delay unit. The first voltage conversion unit converts a voltage of a power supply to a first voltage according to pulse signals output by the PWM. The second voltage conversion unit converts the voltage of the power supply to a second voltage according to the pulse signals. The conversion chip converts the first voltage to a third voltage, converts the second voltage to a fourth voltage, and outputs a power-good signal to a south bridge chipset through the delay unit. The disclosure also provides a notebook computer including the power supply circuit.

Abstract: The disclosure provides a power supply circuit including a pulse width modulator (PWM), a first voltage conversion unit, a second voltage conversion unit, a conversion chip, and a delay unit. The first voltage conversion unit converts a voltage of a power supply to a first voltage according to pulse signals output by the PWM. The second voltage conversion unit converts the voltage of the power supply to a second voltage according to the pulse signals. The conversion chip converts the first voltage to a third voltage, converts the second voltage to a fourth voltage, and outputs a power-good signal to a south bridge chipset through the delay unit. The disclosure also provides a notebook computer including the power supply circuit.

Abstract: An electronically commutated motor, including: a motor body and a motor controller. The motor controller includes a control box and a circuit board disposed in the control box. The circuit board includes a microprocessor, an inverter circuit, a gear detection circuit, and a power supply. The gear detection circuit includes a plurality of current sensing units. The output end of the power supply supplies power to each circuit, and a first AC input end of the power supply is connected to a first power input line N. The gear detection circuit is connected to a plurality of gear input lines. At least one of the gear input lines is selected to be in an energized state. Each gear input line is correspondingly connected to a first input end of one of the current sensing units.

Abstract: A computer has a buffering circuit, a power supply circuit, and a controlling circuit. The computer can perform charging operations when the power supply circuit provides power terminals, and perform discharging operations when the power supply circuit powers off unexpected, to provide power to the controlling circuit. The controlling circuit can control the position of a disk head to the track zero of a disk platter of a hard disk drive.

Abstract: A protection circuit to prevent power-on operations for a motherboard includes a first power supply, a spring mechanical switch attached to a chassis of an electronic device, a plurality of second power supplies with different voltages, and a plurality of electronic switches. The spring mechanical switch includes a first terminal coupled to the first power supply, and a second terminal grounded. First pins of the electronic switches are coupled to the first terminal, second pins of the electronic switches respectively are coupled to the second power supplies, third pins of the electronic switches are capable of powering the motherboard. When the cover is detached from the chassis, the mechanical switch rebounds, the first terminal disconnects and the second terminal are disconnected, the electronic switches are turned off, no voltages output from the third pins of the electronic switches.

Abstract: A motherboard includes a first memory, a power supply, a jumper, a second memory slot and a conversion board. A first idle pin of the second memory slot is coupled to the power supply through the jumper. The motherboard supplies power to the first memory and ensures communication with the first memory by virtue of the conversion board. A conversion board is also provided.