Abstract: A sampling assembly and a sampling method are provided. A self-calibration unit controls a first switch to be turned on, to enable a first sampling signal to be input to a sampling unit. The sampling unit processes the first sampling signal to obtain a second sampling signal, and outputs the second sampling signal to the self-calibration unit. The self-calibration unit controls the first switch to be turned off, controls a second switch to be turned on, and outputs a first calibration signal to the sampling unit. The sampling unit processes the first calibration signal to obtain a second calibration signal, and outputs the second calibration signal to the self-calibration unit. The self-calibration unit determines an error signal based on the first calibration signal and the second calibration signal. The self-calibration unit obtains a calibrated third sampling signal based on the second sampling signal and the error signal.

Abstract: A sampling assembly and a sampling method are provided. A self-calibration unit controls a first switch to be turned on, to enable a first sampling signal to be input to a sampling unit. The sampling unit processes the first sampling signal to obtain a second sampling signal, and outputs the second sampling signal to the self-calibration unit. The self-calibration unit controls the first switch to be turned off, controls a second switch to be turned on, and outputs a first calibration signal to the sampling unit. The sampling unit processes the first calibration signal to obtain a second calibration signal, and outputs the second calibration signal to the self-calibration unit. The self-calibration unit determines an error signal based on the first calibration signal and the second calibration signal. The self-calibration unit obtains a calibrated third sampling signal based on the second sampling signal and the error signal.

Abstract: A control method includes entering, by a powered device, a first status, controlling, by the powered device, at least one of a plurality of first loads in the powered device to be in a connected state, and controlling, by the powered device, a second load in the powered device to be in a disconnected state.

Abstract: A control method includes entering, by a powered device, a first status, controlling, by the powered device, at least one of a plurality of first loads in the powered device to be in a connected state, and controlling, by the powered device, a second load in the powered device to be in a disconnected state.

Abstract: A security control method for a social network user, a social application device and a terminal are provided. The method includes: when information is exchanged between users, a local-end social application acquires the security control authority of a local-end user set by an opposite-end user, and the local-end social application controls, according to the security control authority of the local-end user, the copying operation and the screen capturing operation of the local-end user on the information exchanged.

Abstract: A power sourcing equipment (PSE) chip, and a Power over Ethernet (PoE) device and method are provided, which can determine a status that a peer end is connected to a powered device (PD) when four cable pairs are used to supply power. The PSE chip includes a channel controller, a first channel detector, and a second channel detector. The channel controller sends detection voltages along a first and a second groups of cable pairs in an Ethernet twisted pair; determines a first impedance and a second impedance according to the detection voltages and corresponding currents that are detected; and determines that a first group or a second group of cable pairs is connected to a valid PD according to the impedances and a preset range.

Abstract: A security control method for a social network user, a social application device and a terminal are provided. The method includes: when information is exchanged between users, a local-end social application acquires the security control authority of a local-end user set by an opposite-end user, and the local-end social application controls, according to the security control authority of the local-end user, the copying operation and the screen capturing operation of the local-end user on the information exchanged.

Abstract: A power sourcing equipment (PSE) chip, and a Power over Ethernet (PoE) device and method are provided, which can determine a status that a peer end is connected to a powered device (PD) when four cable pairs are used to supply power. The PSE chip includes a channel controller, a first channel detector, and a second channel detector. The channel controller sends detection voltages along a first and a second groups of cable pairs in an Ethernet twisted pair; determines a first impedance and a second impedance according to the detection voltages and corresponding currents that are detected; and determines that a first group or a second group of cable pairs is connected to a valid PD according to the impedances and a preset range.