Abstract: A method and an apparatus for signal synchronization are disclosed. The method for signal synchronization includes: A self-synchronizing first terminal device broadcasts first synchronization information, determines whether the first terminal device and a second terminal device have implemented signal synchronization when receiving second synchronization information sent by the second terminal device, and determines, based on a determining result, whether to synchronize with the second terminal device. This reduces a probability of communication interruption caused by synchronization source switching by the first terminal device after the second terminal device performs synchronization by using the first terminal device as a synchronization source. The method for signal synchronization may be applied to scenarios such as the intelligent driving, intelligent connected vehicles, and internet of vehicles.

Abstract: An iridium complex for an organic light-emitting device includes the chemical structural formula shown below, where the ring A is selected from C12-C30 polycyclic groups formed by fusing three or more monocyclic groups with each other, and the precondition is that the ring A at least includes the structure of general formula II: R1-R5 are the same or different, and each independently is H, deuterium, halogen, —CF3, CN, amino, substituted or unsubstituted C1-C10 alkoxyl, or substituted or unsubstituted C1-C30 alkyl, hydrogens on the alkyl chain of the C1-C10 alkoxyl and C1-C30 alkyl may each be independently substituted by deuterium, halogen, —CF3 or CN, where the halogen is selected from fluorine, chlorine, bromine or iodine; Rx and Ry are the same or different, and each independently includes saturated aliphatic ring structure. The iridium complex has excellent red-light saturation, luminous efficiency and thermal stability.

Abstract: A method and an apparatus for signal synchronization are disclosed. The method for signal synchronization includes: A self-synchronizing first terminal device broadcasts first synchronization information, determines whether the first terminal device and a second terminal device have implemented signal synchronization when receiving second synchronization information sent by the second terminal device, and determines, based on a determining result, whether to synchronize with the second terminal device. This reduces a probability of communication interruption caused by synchronization source switching by the first terminal device after the second terminal device performs synchronization by using the first terminal device as a synchronization source. The method for signal synchronization may be applied to scenarios such as the intelligent driving, intelligent connected vehicles, and internet of vehicles.