Abstract: A system includes a storage device storing a set of instructions and at least one processor in communication with the storage device. When executing the instructions, the at least one processor is configured to obtain, via a network, rule information for rules for determining alert from a rule library and obtain, via the network, operation data of the on-demand service from a storage medium. The at least one processor may also cause the system to determine whether the operation data is in accordance with the rules for determining alert based on the rule information and determine an alert based on the determination that the operation data is in accordance with the rules for determining alert. The at least one processor may further cause the system to and transmit the alert to be displayed to managers of the on-demand service.

Abstract: A system includes a storage device storing a set of instructions and at least one processor in communication with the storage device. When executing the instructions, the at least one processor is configured to obtain, via a network, rule information for rules for determining alert from a rule library and obtain, via the network, operation data of the on-demand service from a storage medium. The at least one processor may also cause the system to determine whether the operation data is in accordance with the rules for determining alert based on the rule information and determine an alert based on the determination that the operation data is in accordance with the rules for determining alert. The at least one processor may further cause the system to and transmit the alert to be displayed to managers of the on-demand service.

Abstract: Nonlinear control method for the micro-grid inverter with anti-disturbance. By generating reference currents that satisfy specific active and reactive power command under various working conditions, and introducing a nonlinear control method based on Lyapunov function to control the inverter, fast and accurate tracking of the generated reference signals is realized. The method realizes effective decoupling control of active power and reactive power. The system has high dynamic response and good robustness. Besides, the control structure of the method is simple and easy to implement, and the synchronous control link and the additional voltage and current regulator are omitted. The method realizes fast and accurate power exchange and stable power transmission between the inverter and the grid in the micro-grid under various working conditions, and provides a guarantee for improving the energy management efficiency within the micro-grid.

Abstract: Nonlinear control method for the micro-grid inverter with anti-disturbance. By generating reference currents that satisfy specific active and reactive power command under various working conditions, and introducing a nonlinear control method based on Lyapunov function to control the inverter, fast and accurate tracking of the generated reference signals is realized. The method realizes effective decoupling control of active power and reactive power. The system has high dynamic response and good robustness. Besides, the control structure of the method is simple and easy to implement, and the synchronous control link and the additional voltage and current regulator are omitted. The method realizes fast and accurate power exchange and stable power transmission between the inverter and the grid in the micro-grid under various working conditions, and provides a guarantee for improving the energy management efficiency within the micro-grid.

Abstract: A feedforward voltage series compensator based on complimentary use of wind, solar, and electric power comprising a controller, a rectifier unit, an H bridge inverter, a series transformer, a wind-power DC voltage sensor, a wind-power DC current sensor, an AC voltage transducer, a DC boost unit, a PV DC voltage sensor, a PV DC current sensor, and a grid-connected inverter. The compensator makes use of wind-electric and photovoltaic-electric complimentary interactions to solve the traditional energy issue for series compensator, and as the grid-connected inverter is feedforward, there is extra capacity for the series transformer and the series complimentary inverter unit, and hence it enjoys the feedforward and quick voltage complimentary characteristics of the wind and solar power generation.

Abstract: A method for designing cascaded multi-level inverters with minimization of large-scale voltage distortion, based on KKT (Karush-Kuhn-Tucker) conditions and with simplified computation of conduction angles, simplifies the computation process, and is conducive to on-line calculation. Meanwhile, its fundamental voltage is adaptive, minimization of total harmonic is realized for cascaded multi-level inverters at high-voltage, and voltage power quality at grid connected nodes is improved.

Abstract: A method for designing cascaded multi-level inverters with minimization of large-scale voltage distortion, based on KKT (Karush-Kuhn-Tucker) conditions and with simplified computation of conduction angles, simplifies the computation process, and is conducive to on-line calculation. Meanwhile, its fundamental voltage is adaptive, minimization of total harmonic is realized for cascaded multi-level inverters at high-voltage, and voltage power quality at grid connected nodes is improved.

Abstract: A feedforward voltage series compensator based on complimentary use of wind, solar, and electric power comprising a controller, a rectifier unit, an H bridge inverter, a series transformer, a wind-power DC voltage sensor, a wind-power DC current sensor, an AC voltage transducer, a DC boost unit, a PV DC voltage sensor, a PV DC current sensor, and a grid-connected inverter. The compensator makes use of wind-electric and photovoltaic-electric complimentary interactions to solve the traditional energy issue for series compensator, and as the grid-connected inverter is feedforward, there is extra capacity for the series transformer and the series complimentary inverter unit, and hence it enjoys the feedforward and quick voltage complimentary characteristics of the wind and solar power generation.

Abstract: Provided are a bubble-based microvalve and a microfluidic chip using the microvalve. Also provided are methods of using the microvalve for manipulating fluid in a microfluidic channel by changing the volume and/or location of the gas in the microvalve.

Abstract: Provided are compositions for controlled release of biomolecules, which comprise conjugates of polymers and biomolecules conjugated through non-covalent interactions. Also provided are methods for controlled release of biomolecules and their use in biochips.

Abstract: The present invention is a method and apparatus for providing enterprise event marketing and management automation. A website is provided that includes online tools for event marketing and management. A user in communication with the website is allowed to create and event page and a registration page associated with the event page, utilizing the online tools. The event page includes a link to the registration page. The event page is forwarded to a participant to enable the participant to establish communication with the registration page utilizing the link. The registration page is forwarded to the participant to be completed and returned in response to the communication and a confirmation is communicated the participant in response to receiving the registration page and response. Information received from the participant is communicated to the user in order to allow for further event organization and management.