Abstract: A composition and use thereof. The composition comprises an active component a and an active component b; the active component a is a compound as shown in general formula A; and the active component b is at least one of compounds which have insecticidal, acaricidal or bactericidal activity and are different from the compound as shown in general formula A. The composition has the advantages of synergistic effect and expanding prevention and treatment spectrum, and can be used for preventing and treating various pests, particularly mite damage, and plant diseases caused by various fungi, bacteria, nematodes and viruses.

Abstract: A dynamic stability analysis and control method for a voltage sourced converter based high voltage direct current (VSC-HVDC) transmission system. The method includes the following steps: unlocking a converter station of the VSC-HVDC transmission system to make the VSC-HVDC transmission system run in a non-island control mode; extracting corresponding parameters of the VSC-HVDC transmission system, wherein the parameters include an effective voltage value Ut0 of an AC system, an outgoing reactive power Qvsc0 of the VSC-HVDC transmission system, a gain kp of a phase-locked loop (PLL), and a proportional integral time constant ki of the PLL; calculating a short-circuit ratio (SCR), an unit value of Ut0 and an unit value of Qvsc0; calculating a key stable component; checking the sign of the key stable component to determine the stability of the VSC-HVDC transmission system.

Abstract: A dynamic stability analysis and control method for a voltage sourced converter based high voltage direct current (VSC-HVDC) transmission system. The method includes the following steps: unlocking a converter station of the VSC-HVDC transmission system to make the VSC-HVDC transmission system run in a non-island control mode; extracting corresponding parameters of the VSC-HVDC transmission system, wherein the parameters include an effective voltage value Ut0 of an AC system, an outgoing reactive power Qvsc0 of the VSC-HVDC transmission system, a gain kp of a phase-locked loop (PLL), and a proportional integral time constant ki of the PLL; calculating a short-circuit ratio (SCR), an unit value of Ut0 and an unit value of Qvsc0; calculating a key stable component; checking the sign of the key stable component to determine the stability of the VSC-HVDC transmission system.

Abstract: A midplane of a communication device, includes the first connectors and the second connectors which connect with each other via high-speed traces, the first connectors arrange in parallel at one side of the midplane, the second connectors arrange in parallel at the other side of the midplane and in parallel with the first connectors. The wiring of high-speed traces between the first connectors and the second connectors can be disposed on the whole midplane, so that it avoids the high density of wiring in part of midplane, reduces the number of layers of the midplane and the complexity of design, and reduces the crosstalk in signals. And the cooling of the whole communication device can be accomplished by only one heat dissipation system, it reduces the complexity of design of the communication device. The area between each frames of the midplane is provided to allocate electrical power in the communication device with two or multiple frames, it reduces the costs of the communication device.

Abstract: A power supply system is provided, which includes a power supply subrack (PSS) and a power cable distributor (PCD). The PSS includes one or more power modules and a third connector (51), and the PCD is adapted to introduce one or more electrical signals from power input cables. The third connector (51) in the PSS is connected to the PCD and adapted to feed the introduced electrical signals to the power modules. Furthermore, a power cable distributor, a power supply subrack adapted to work with the PCD and an integrated equipment are provided.

Abstract: A midplane of a communication device, includes the first connectors and the second connectors which connect with each other via high-speed traces, the first connectors arrange in parallel at one side of the midplane, the second connectors arrange in parallel at the other side of the midplane and in parallel with the first connectors. The wiring of high-speed traces between the first connectors and the second connectors can be disposed on the whole midplane, so that it avoids the high density of wiring in part of midplane, reduces the number of layers of the midplane and the complexity of design, and reduces the crosstalk in signals. And the cooling of the whole communication device can be accomplished by only one heat dissipation system, it reduces the complexity of design of the communication device. The area between each frames of the midplane is provided to allocate electrical power in the communication device with two or multiple frames, it reduces the costs of the communication device.

Abstract: A power supply system is provided, which includes a power supply subrack (PSS) and a power cable distributor (PCD). The PSS includes one or more power modules and a third connector (51), and the PCD is adapted to introduce one or more electrical signals from power input cables. The third connector (51) in the PSS is connected to the PCD and adapted to feed the introduced electrical signals to the power modules. Furthermore, a power cable distributor, a power supply subrack adapted to work with the PCD and an integrated equipment are provided.