Abstract: The disclosure proposes a yaw calibration method and system for a wind turbine. The calibration method includes: establishing a cylindrical coordinate graph of wind resource distribution based on historical wind farm operation data, to determine a wind direction interval of main inflow wind conditions of a wind farm; calculating an effective value of active power of each wind speed sub-interval, and obtaining a fitted power curve of each refined interval through curve fitting; and setting an angle between a central axis of a refined interval for a fitted power curve corresponding to a calibration curve in each wind speed range and a central axis of the to-be-calibrated wind direction interval as a yaw error calibration value in the wind speed range, to establish a wind speed-yaw error calibration value lookup table; and determining a yaw error calibration value under a current wind direction and a current wind.

Abstract: An LED flexible light bar having a circuit board (2), LED flip chips (3) are arranged at an upper end of the circuit board (2). The LED flip chips (3) and the circuit board (2) are connected together by a plurality of solder paste bumps (16). Compared with the conventional art, the LED flexible light bar has beneficial effects of simple product structure, less investment in production equipment, reduced manpower requirements, easy implementation of assembly line production, higher production efficiency, lower production costs and the like, and is suitable for both a Flexible Printed Circuit (FPC) and a Printed Circuit Board (PCB) with a wider range of application.

Abstract: The disclosure proposes a yaw calibration method and system for a wind turbine. The calibration method includes: establishing a cylindrical coordinate graph of wind resource distribution based on historical wind farm operation data, to determine a wind direction interval of main inflow wind conditions of a wind farm; calculating an effective value of active power of each wind speed sub-interval, and obtaining a fitted power curve of each refined interval through curve fitting; and setting an angle between a central axis of a refined interval for a fitted power curve corresponding to a calibration curve in each wind speed range and a central axis of the to-be-calibrated wind direction interval as a yaw error calibration value in the wind speed range, to establish a wind speed-yaw error calibration value lookup table; and determining a yaw error calibration value under a current wind direction and a current wind.

Abstract: An LED flexible light bar, comprising a circuit board (2), LED flip chips (3) are arranged at an upper end of the circuit board (2). The LED flip chips (3) and the circuit board (2) are connected together by a plurality of solder paste bumps (16). Compared with the conventional art, the LED flexible light bar has beneficial effects of simple product structure, less investment in production equipment, reduced manpower requirements, easy implementation of assembly line production, higher production efficiency, lower production costs and the like, and is suitable for both a Flexible Printed Circuit (FPC) and a Printed Circuit Board (PCB) with a wider range of application.

Abstract: The present disclosure provides a method for providing an application list. The method includes: a mobile terminal records and processes information on a user's usage of third party applications to obtain history data about the third party applications, matches the history data about the third party applications with application information in a database of an application store, forms a third party application selection list from the matched result, and pushes the content of the third party application selection list to a display interface of the application store on the mobile terminal. An apparatus for providing an application list is also provided.

Abstract: The present disclosure provides a method for providing an application list. The method includes: a mobile terminal records and processes information on a user's usage of third party applications to obtain history data about the third party applications, matches the history data about the third party applications with application information in a database of an application store, forms a third party application selection list from the matched result, and pushes the content of the third party application selection list to a display interface of the application store on the mobile terminal. An apparatus for providing an application list is also provided.