Abstract: Disclosed is a method and a device for denoising a video based on non-local means, which is capable of making self-adaptive adjustment in response to illumination variance of the frame in the video.

Abstract: A wind turbine condition monitoring method includes the steps of generating in advance a reference curve for normal operation of a transmission chain of a wind turbine using position information, measuring position information and generating an actual condition monitoring curve; comparing the actual condition monitoring curve with the reference curve, and determining the current condition of the wind turbine from the comparison. With the proposed monitoring method, monitoring with a high signal-to-noise ratio can be achieved with minimal or no addition of hardware, such as an ND module; moreover, computational task is greatly reduced, so that the monitoring system can be more easily integrated into the main control system. In addition, the position measurement system is more stable than a vibration measurement system, and the monitoring result is more reliable.

Abstract: A power supply device is disclosed for use in electronic equipment. In an embodiment, the power supply device includes: a current transformer with N secondary winding parts connected in series, an energy storage capacitor and a winding selector, in which N is an integral number and N?2, wherein the winding selector selectively enables one or more serially connected winding parts of the N secondary winding parts to output an electrical current, in response to a state signal indicating the operating state of the electronic equipment; and the energy storage capacitor is charged by the output current, and supplies power to a main circuit of the electronic equipment. In the embodiments of the present invention, there is also provided corresponding electronic equipment and a corresponding method. By way of the embodiments of the present invention, it is possible to supply electrical energy at relatively low power loss.

Abstract: A method and an apparatus for quantitatively detecting the unbalanced state of a rotating shaft and a clamping state of a workpiece clamped to a shaft are disclosed by solving with a nonlinear multivariable method a Lagrange kinematics equation to determine from acquired position, velocity, acceleration and torque signals of the rotating shaft an unbalanced amplitude variable and an unbalanced angle variable of the rotating shaft, optionally both with and without a workpiece. The motor driving the shaft is energized with a combined S-shaped and sinusoidal velocity profile with a position profile component, a velocity profile component, and an acceleration profile component. The components are selected such that the motor speed during the accelerating and decelerating stages does not change abruptly.

Abstract: The present invention provides a method for the safety of network terminal devices that utilizes the basic operations in network terminal devices (NTDs) and a network security center (NSC), as well as the analyzing and processing ability provided by the NSC to solve network security issues based on hierarchical network security structure of client request-server response. In the NSC, the solution is broken into a plurality of basic operations with their respective corresponding parameters. Each basic operation is encoded according to an operation code table (OCT) and encapsulated in a network security suspicion information packet (NSSIP). The NSC sends the NSSIP to the NTD. The NTD receives and splits the network security solution packet (NSSP) to get the plurality of operation codes and their respective corresponding parameters. The NTD retrieves a plurality of call interfaces from the OCT according to the plurality of operation codes.

Abstract: A dynamic voltage compensator for compensating voltage fluctuations in a three-phase power supply system that includes two dynamic voltage restorers (DVR), and two phases are selected arbitrarily from the three-phase power supply system with each selected power supply phase connected in series with one of said dynamic voltage restorers respectively. The dynamic voltage restorers are each used to monitor the voltage between the power supply phase it is connected to and the power supply phase unselected, and to restore the voltage to a normal level when voltage fluctuation is monitored, and at the same time the phase voltage of the unselected phase can also be restored to its normal level. In this way, it can ensure that the phase voltages of the three phases can be restored to the normal level by using only two sets of single-phase DVRs.

Abstract: At least one embodiment of the present invention provides a method for detecting voltage disturbance. In at least one embodiment the method includes storing the digitized point values of a voltage reference waveform; detecting actual voltage values, and converting the actual voltage values by digitization into point values of the actual voltage which are in one-to-one correspondence with the point values of the reference waveform; comparing the point values of the actual voltage with the corresponding point values of the reference waveform; judging that a voltage disturbance occurs if, for N successive points, the differences between the point values of the actual voltage and the corresponding point values of the reference waveform are all greater than a predetermined disturbance threshold, wherein N is an integer greater than 0. A technical solution of the present invention improves the response speed of the detection, and shortens the response time.

Abstract: A method and device for controlling a fermenting process, wherein the method comprises collecting samples of biological cells from a fermenting tank, obtaining the state information of the current biological cells based on the collected samples, comparing the state information of the current biological cells with preset target status information to obtain the difference between the state information of the current biological cells and preset target state information, and controlling the feed rate of nutritional solution into the fermenting tank. Real time control of biological fermenting process is thus accomplished based on the state information of the biological cells during fermentation, and the consistency during fermentation is improved. Complicated mathematical modeling and man-made data analysis are not required for the method and device.

Abstract: A large current sensor is disclosed. In at least one embodiment, the large current sensor includes a primary coil and a secondary coil, wherein the primary coil is in a spiral form and forms a cavity, and the secondary coil is disposed in the cavity for producing an induced secondary voltage when a primary current flows in the primary coil. Advantages of the large current sensor of at least one embodiment of the present invention can include that it is simple in structure, safe in operation, and its out signal has high linearity and high accuracy and it can supply power to an electronic trip unit.

Abstract: A method and an apparatus for quantitatively detecting the unbalanced state of a rotating shaft and a clamping state of a workpiece clamped to a shaft are disclosed by solving with a nonlinear multivariable method a Lagrange kinematics equation to determine from acquired position, velocity, acceleration and torque signals of the rotating shaft an unbalanced amplitude variable and an unbalanced angle variable of the rotating shaft, optionally both with and without a workpiece. The motor driving the shaft is energized with a combined S-shaped and sinusoidal velocity profile with a position profile component, a velocity profile component, and an acceleration profile component. The components are selected such that the motor speed during the accelerating and decelerating stages does not change abruptly.

Abstract: At least one embodiment of the present invention proposes a dynamic voltage compensator for compensating voltage fluctuations in a three-phase power supply system. In at least one embodiment, the dynamic voltage compensator includes two dynamic voltage restorers (DVR), and two phases are selected arbitrarily from the three-phase power supply system with each selected power supply phase connected in series with one of said dynamic voltage restorers respectively. The dynamic voltage restorers are each used to monitor the voltage between the power supply phase it is connected to and the power supply phase unselected, and to restore the voltage to a normal level when voltage fluctuation is monitored, and at the same time the phase voltage of the unselected phase can also be restored to its normal level. In this way, it can ensure that the phase voltages of the three phases can be restored to the normal level by using only two sets of single-phase DVRs.

Abstract: At least one embodiment of the present invention provides a method for detecting voltage disturbance. In at least one embodiment the method includes storing the digitized point values of a voltage reference waveform; detecting actual voltage values, and converting the actual voltage values by digitization into point values of the actual voltage which are in one-to-one correspondence with the point values of the reference waveform; comparing the point values of the actual voltage with the corresponding point values of the reference waveform; judging that a voltage disturbance occurs if, for N successive points, the differences between the point values of the actual voltage and the corresponding point values of the reference waveform are all greater than a predetermined disturbance threshold, wherein N is an integer greater than 0. A technical solution of at least one embodiment of the present invention improves the response speed of the detection, and shortens the response time.