Abstract: Embodiments of this application are applied to a wireless local area network system that supports 802.11 series protocols, for example, a next-generation Wi-Fi protocol of IEEE 802.11ax, such as 802.11be, Wi-Fi 7, or EHT, or for another example, a next-generation protocol of 802.11be or Wi-Fi 8, and may be further applied to an ultra-wideband UWB-based wireless personal area network system or a sensing (sensing) system. Embodiments of this application provide a communication method and apparatus. The method includes: generating a synchronization header field based on a sequence set, where the sequence set includes at least one of the following sequences: a sequence with a length of 127, a sequence with a length of 31, a sequence with a length of 91, or a sequence with a length of 64; and sending the synchronization header field.

Abstract: A multi-scale prediction method for an ablation behavior of a hypersonic aircraft heat resistant structure, includes inputting hypersonic inflow far field boundary conditions into a macro CFD solver to perform numerical simulation of the external flow field of a hypersonic aircraft; extracting the mass fraction and temperature distribution of wall surface components; obtaining an msd.txt file and an atomic path file recording the mean square displacement data through a micro RMD solver; obtaining the ratio of mass loss rate to material density, namely, the ablation retreating rate using the MSD method and Fick's law; inputting it into a CFD solver for performing grid reconstruction and transient calculation to obtain the transient variation in the external flow field of a hypersonic aircraft along the ablation retreating of the aircraft wall surface.

Abstract: A multi-scale prediction method for an ablation behavior of a hypersonic aircraft heat resistant structure, includes inputting hypersonic inflow far field boundary conditions into a macro CFD solver to perform numerical simulation of the external flow field of a hypersonic aircraft; extracting the mass fraction and temperature distribution of wall surface components; obtaining an msd.txt file and an atomic path file recording the mean square displacement data through a micro RMD solver; obtaining the ratio of mass loss rate to material density, namely, the ablation retreating rate using the MSD method and Fick's law; inputting it into a CFD solver for performing grid reconstruction and transient calculation to obtain the transient variation in the external flow field of a hypersonic aircraft along the ablation retreating of the aircraft wall surface.