Abstract: The present invention discloses an electrical state quantity prediction method and system and a control method and system for a UPS system. In terms of UPS system control strategies, relationships between predicted values of dynamic variables of the UPS system and switch variables of switch tubes are first obtained through a discrete model of the UPS system, then a target optimization control function is constructed based on MPC (Model Predictive Control), and finally, optimal switch variables at each time are obtained by traversing cost values Q of the target optimization control function in various switch states. The method of the present invention solves problems of complex cooperative control, difficult control optimization and the like in a multi-converter system, and improves work efficiency of a high-power UPS system and stability of the control system.

Abstract: A diesel-storage independent microgrid and a virtual dynamic synchronous control method and system are described. An adaptive dynamic synchronous torque and pre-synchronous compensation phase angles are introduced into a energy storage converter control system to realize output voltage and power synchronization before and after parallel connection of the system. By compensating the pre-synchronous phase angles, the phase angles of a diesel generator and an energy storage converter are kept consistent before parallel connection, which reduces current impact during the parallel process. By introducing the adaptive dynamic synchronous torque, after the parallel connection of the system, the virtual torque of the energy storage converter can be adaptively and dynamically adjusted according to the current accelerations of the diesel generator and the energy storage converter under the condition that the inertial parameter of a diesel engine is black-boxed.

Abstract: The present invention discloses a diesel-storage independent microgrid and a virtual dynamic synchronous control method and system therefor. An adaptive dynamic synchronous torque and pre-synchronous compensation phase angles are introduced into the energy storage converter control system to realize output voltage and power synchronization before and after parallel connection of the system. By compensating the pre-synchronous phase angles, the phase angles of a diesel generator and an energy storage converter are kept consistent before parallel connection, which reduces current impact during the parallel process.

Abstract: The present invention discloses an electrical state quantity prediction method and system and a control method and system for a UPS system. In terms of UPS system control strategies, relationships between predicted values of dynamic variables of the UPS system and switch variables of switch tubes are first obtained through a discrete model of the UPS system, then a target optimization control function is constructed based on MPC (Model Predictive Control), and finally, optimal switch variables at each time are obtained by traversing cost values Q of the target optimization control function in various switch states. The method of the present invention solves problems of complex cooperative control, difficult control optimization and the like in a multi-converter system, and improves work efficiency of a high-power UPS system and stability of the control system.

Abstract: The present invention provides a method, a system and a storage medium for frequency adjustment of an islanded virtual synchronous micro-grid. The method includes: performing frequency adjustment on inverters in the micro-grid in a cyclic manner until the respective inverters reach rated frequencies; where each cycle includes: determining, in a differential delay manner, an inverter with a highest active output in the micro-grid as a reference unit, and sending a local output factor of the reference unit as a maximum output factor of a current cycle to other inverters; determining, for each inverter in the micro-grid, an active power adjustment amount of the inverter according to the maximum output factor, a preset rated frequency, a local output factor and an actual angular frequency of the inverter; and performing frequency adjustment on the inverter according to the active power adjustment amount.

Abstract: The present invention provides a method, a system and a storage medium for frequency adjustment of an islanded virtual synchronous micro-grid. The method includes: performing frequency adjustment on inverters in the micro-grid in a cyclic manner until the respective inverters reach rated frequencies; where each cycle includes: determining, in a differential delay manner, an inverter with a highest active output in the micro-grid as a reference unit, and sending a local output factor of the reference unit as a maximum output factor of a current cycle to other inverters; determining, for each inverter in the micro-grid, an active power adjustment amount of the inverter according to the maximum output factor, a preset rated frequency, a local output factor and an actual angular frequency of the inverter; and performing frequency adjustment on the inverter according to the active power adjustment amount.

Abstract: A steady state control method for a three-phase double-mode inverter. Off-grid steady state control is composed of outer loop power droop control, voltage feed-forward quasi-resonant control, and inner current loop dead-beat control. Therefore, the response speed of the inverter is raised, and the influence caused by the load fluctuation of a micro-grid is inhibited. Based on the off-grid steady state control, grid-connected steady state control introduces phase lead control to the power droop control. Therefore, the output voltage of the inverter is always slightly ahead of the power grid voltage, which avoids the energy pour backward phenomenon of the inverter due to a phase error, and realizes stable and reliable running in the grid-connected mode.

Abstract: A steady state control method for a three-phase double-mode inverter. Off-grid steady state control is composed of outer loop power droop control, voltage feed-forward quasi-resonant control, and inner current loop dead-beat control. Therefore, the response speed of the inverter is raised, and the influence caused by the load fluctuation of a micro-grid is inhibited. Based on the off-grid steady state control, grid-connected steady state control introduces phase lead control to the power droop control. Therefore, the output voltage of the inverter is always slightly ahead of the power grid voltage, which avoids the energy pour backward phenomenon of the inverter due to a phase error, and realizes stable and reliable running in the grid-connected mode.

Abstract: The invention relates to a ultraviolet anti-counterfeiting check verification method which solves subjective defect and time consuming problems of the traditional verification methods, and comprises the following steps: a. collecting ultraviolet gray level image by a ultraviolet scanner; b. extracting a first binary image from the ultraviolet gray level image; c. calculating a tilt angle of the first binary image; d. calculating tilt correction positions of pixels of the ultraviolet gray level image and the first binary image; e. determining a top left corner locating position of a first binary image rectangle; f. extracting a second binary image from the tilt corrected ultraviolet gray level image; g. performing position correction on the second binary image of a check to be verified; and h. calculating the matching degree between the second binary image of the check to be verified and a second binary image of a real check to verify authenticity.

Abstract: A dry sensor EEG/EMG and motion sensing system for seizure detection and monitoring is disclosed. In some embodiments, a system for seizure detection/monitoring is provided that can measure a user's EEG/EMG and motor activity, automatically detect an epileptic seizure and perform actions, such as triggering an alarm and/or turning off the provoking stimulation. In some embodiments, a system for seizure detection/monitoring is provided that can be used to continuously monitor and store a user's EEG/EMG and motor activity for doctor evaluation. In some embodiments, a system for seizure detection/monitoring is provided that can be mounted directly on a user's head using active dry EEG sensors. In some embodiments, a system for seizure detection/monitoring is provided that can be mounted into/onto a pair of glasses (e.g., 3D glasses), and the user's eyes can be automatically covered by the glasses if a seizure is detected.

Abstract: The invention relates to an automation technology.

Abstract: The invention solves present problems of insufficient flexibility and convenience and inefficiency in processing of corporate bill businesses, and provides a corporate bill self-service system with functions of blank bill selling and temporary bill storage, and the technical solution thereof can be summarized as follows: the corporate bill self-service system with functions of blank bill selling and temporary bill storage consists of a business self-service center platform and at least a front-end corporate bill self-service terminal which are connected with each other; the corporate bill business self-service centre platform is used for providing entry of system basic platform building information, data storage, equipment monitoring, optical character recognition (OCR), interface with an external system and system data inquiry statistics management; and the front-end corporate bill self-service terminal is used for storing corporate bills, recovering invalidated corporate bills, achieving interaction with us

Abstract: The invention relates to a ultraviolet anti-counterfeiting check verification method which solves subjective defect and time consuming problems of the traditional verification methods, and comprises the following steps: a. collecting ultraviolet gray level image by a ultraviolet scanner; b. extracting a first binary image from the ultraviolet gray level image; c. calculating a tilt angle of the first binary image; d. calculating tilt correction positions of pixels of the ultraviolet gray level image and the first binary image; e. determining a top left corner locating position of a first binary image rectangle; f. extracting a second binary image from the tilt corrected ultraviolet gray level image; g. performing position correction on the second binary image of a check to be verified; and h. calculating the matching degree between the second binary image of the check to be verified and a second binary image of a real check to verify authenticity.

Abstract: An EEG control of devices using Sensory Evoked Potentials (SEPs) (e.g., visually-evoked potentials), is disclosed. In some embodiments, a system receives a plurality of EEG signal samples; generates a stimulus locked average signal using the plurality of EEG signal samples; and determines whether the plurality of EEG signal samples are evoked in response to a pattern of stimulus.

Abstract: Techniques for mobile cardiac health monitoring are disclosed. In some embodiments, a system for mobile cardiac health monitoring includes a mobile device that includes a processor configured to receive a first set of data from an optical sensor; receive a second set of data from an electrical sensor; and perform a plurality of cardiac health measurements using the first set of data from the optical sensor and the second set of data from the electrical sensor.