Abstract: A method and network node for online coordinated multi-cell precoding are provided. According to one aspect, a method includes receiving from each of the plurality of service providers a virtual precoder matrix determined by the corresponding service provider. The method also includes determining a precoder matrix by minimizing a precoding deviation from a virtualization demand of the network subject to at least one power constraint, the virtualization demand being based at least in part on a product of a channel state matrix and a virtual precoder matrix. The method further includes applying the determined precoder matrix to signals applied to a plurality of antennas to achieve a sum of throughputs for the plurality of service providers that is greater than a sum of throughputs for the plurality of service providers achievable when the virtual precoder matrices are applied to the signals.

Abstract: An array substrate includes a first electrode, scanning lines extending along a first direction, data lines, and common signal lines. The data lines and the common signal lines extend along a second direction. The first electrode includes a first and a second sub-electrode. Each data line is disposed between two common signal lines. Two scanning lines, two common signal lines, and a data line define a first and a second sub-pixel area. The first and the second sub-electrode are disposed within the first and the second sub-pixel area respectively. The first sub-electrode includes a first main portion disposed close to a common signal line and first branch portions spaced along the second direction. A first space is defined between two adjacent first branch portions. Ends of the first branch portions are connected to the first main portion. Another ends of the first branch portions are spaced with a first space.

Abstract: A method for performing online convex optimization is provided. The method includes receiving, from two or more worker nodes, a local decision vector and local data corresponding to each of the two or more worker nodes. The method includes performing a multi-step gradient descent based on the local decision vector and the local data received from the two or more worker nodes. Performing the multi-step gradient descent includes determining a global decision vector and corresponding global information. The method includes sending, to each of the two or more worker nodes, the global decision vector and corresponding global information.

Abstract: A device for inspecting the rotor windings of a generator includes a sequential logic circuit that generates a full-cycle pulse. A high-voltage full-cycle pulse matching generator couples the full-cycle pulse generated by the sequential logic circuit to form a corresponding transient bidirectional rotating magnetic field pulse. The transient bidirectional rotating magnetic field pulse is transmitted to two ends and a large shaft of the generator rotor winding through an impedance-matched connecting line. The transient bidirectional rotating magnetic field pulse generates a resonance effect with each large coil in the rotor. The pulse signal coupling feedback acquisition circuit couples all waveforms reflected by the generator rotor to form a magnetic field waveform, and the magnetic field waveform is transmitted to a data acquisition system by an operational amplifier. A central processing unit transmits a digital information stream to an upper computer.

Abstract: A device for inspecting the rotor windings of a generator includes a sequential logic circuit that generates a full-cycle pulse. A high-voltage full-cycle pulse matching generator couples the full-cycle pulse generated by the sequential logic circuit to form a corresponding transient bidirectional rotating magnetic field pulse. The transient bidirectional rotating magnetic field pulse is transmitted to two ends and a large shaft of the generator rotor winding through an impedance-matched connecting line. The transient bidirectional rotating magnetic field pulse generates a resonance effect with each large coil in the rotor. The pulse signal coupling feedback acquisition circuit couples all waveforms reflected by the generator rotor to form a magnetic field waveform, and the magnetic field waveform is transmitted to a data acquisition system by an operational amplifier. A central processing unit transmits a digital information stream to an upper computer.

Abstract: A central point positioning determination device and a central point positioning method thereof for a rotor coil of a large-scale steam turbine generator includes a control device, a pulse acquisition device, and a pulse generation device. The pulse generation device is connected to connection ends of a positive terminal and a negative terminal of the rotor of the generator, and a rotor body of the rotor. The control device controls the pulse generation device to send pulses to the positive terminal, the negative terminal, and the rotor body of the rotor of the generator. By doing so, the central point of the rotor coil can be found conveniently and quickly.

Abstract: A central point positioning determination device and a central point positioning method thereof for a rotor coil of a large-scale steam turbine generator includes a control device, a pulse acquisition device, and a pulse generation device. The pulse generation device is connected to connection ends of a positive terminal and a negative terminal of the rotor of the generator, and a rotor body of the rotor. The control device controls the pulse generation device to send pulses to the positive terminal, the negative terminal, and the rotor body of the rotor of the generator. By doing so, the central point of the rotor coil can be found conveniently and quickly.