Abstract: The present application provides a control method and a control device (710) for a wind turbine (720). The control method includes: acquiring incoming wind information of the wind turbine (720); determining whether there is a sector with a complex wind condition around the wind turbine (720) based on the acquired incoming wind information; in response to determining that there is a sector with a complex wind condition around the wind turbine (720), performing feed-forward load reduction control on the wind turbine (720) based on the complex wind condition.

Abstract: Disclosed is a method and system for grid connection management of renewable energy generation, the method comprises: obtaining operating condition data of a first power supply, a second power supply, a power grid, and a load in a preset period; establishing a first optimal control model according to the first condition data, and establishing a second optimal control model; monitoring grid connection management status of the first optimal control model and the second optimal control model; analyzing stability when the first optimal control model is switched to the second optimal control model. The beneficial effects of this disclosure are: completing the switch from the first optimal control model to the second optimal control model in the renewable energy generation grid connection management, which improves the smoothness of control model switching under different load conditions in the renewable energy generation process.

Abstract: A system adapted to detect rotation of at least two spray arms of a household appliance spaced along a longitudinal axis of the appliance includes a first detection magnet, a second detection magnet and a magnetic sensor. The first detection magnet is arranged on a first spray arm of the at least two spray arms. The second detection magnet is arranged on a second spray arm of the at least two spray arms. A magnetic field direction of the second detection magnet is different from a magnetic field direction of the first detection magnet. The magnetic sensor is arranged in the household appliance and is adapted to sense a motion status of the first detection magnet and the second detection magnet.

Abstract: The present disclosure provides an intelligent replacement device and method for a trap board in a tea garden based on image channel computation. The device includes a trap board supply module, a trap board sticker removal module and a machine vision control module fixed on a machine frame, where the machine vision control module is configured to acquire an image of a present trap board in the trap board supply module, determine whether the present trap board fails according to the image, control, in response to failure of the present trap board, the trap board supply module to replace the trap board, and control the trap board sticker removal module to remove a film of a replaced trap board. The present disclosure can replace the trap board in the tea garden automatically, timely and accurately instead of the manual operation.

Abstract: A portable electronic device (10) includes a housing (130), a receiver (190, 450) operably coupled to the housing for receiving data regarding a physical location of the portable electronic device, a location trigger unit (300), and an application unit (200). The location trigger unit is operably coupled to the housing and to the receiver, and the location trigger unit comprises a first processor (322). The application unit is operably coupled to the housing and to the location trigger unit, and comprises a second processor (222). The application unit comprises a plurality of operating modes. The location trigger unit, based on the physical location of the portable electronic device, is operable to at least one of effect a) changing the operating mode of the application unit, and b) turning on and off the second processor of the application unit. The portable electronic device maybe a portable phone.