Abstract: An energy storage system and a control method thereof are provided. The control method includes steps of: (a) providing an energy storage system including N energy storage modules; (b) obtaining a first sequence and a second sequence by sorting the N energy storage units based on the quantity of electricity in descending order and ascending order respectively; (c) determining a required power of the power grid according to a grid frequency; (d) when the required power is positive, controlling first X energy storage units in the first sequence to discharge for collectively providing an electrical energy, having same magnitude with the required power, to the power grid; and (e) when the required power is negative, controlling first Y energy storage units in the second sequence to collectively receive an electrical energy, having same magnitude with the required power, from the power grid for charging.

Abstract: A method for fabricating semiconductor device includes the steps of: forming a gate structure on a substrate; forming a first spacer adjacent to the gate structure, wherein the first spacer comprises silicon carbon nitride (SiCN); forming a second spacer adjacent to the first spacer, wherein the second spacer comprises silicon oxycarbonitride (SiOCN); and forming a source/drain region adjacent to two sides of the second spacer.

Abstract: An exemplary method provides-base traffic control (rbtc) information. A network node receives a request generated by a user's electronic device for the rbtc information, where the request includes location data. The network node determines a roadway associated with the location data. A database is queried for rbtc information relevent to the roadway and a position on the roadway associated with the location data. A reply is received to the query where the reply contains relevant rbtc information. The relevant rbtc information is transmitted from the network node to the user's device.