Abstract: The present disclosure relates to a domain decomposition method and system for electromagnetic simulation. The method includes: dividing an antenna structure model into multiple subdomains, where each of the subdomains corresponds to a structure in one to-be-simulated array antenna; subdividing each of the subdomains by a tetrahedral network to obtain multiple tetrahedrons; obtaining a vector basis function of each edge of each of the tetrahedrons according to vertex positions and lengths of the edges of the tetrahedron; and calculating an electric field value and a magnetic field value of any point in a tetrahedron to which each of the edges belongs using a vector basis function corresponding to the edge and a double curl electric field wave equation of a subdomain to which the edge belongs.

Abstract: The present disclosure relates to a domain decomposition method and system for electromagnetic simulation. The method includes: dividing an antenna structure model into multiple subdomains, where each of the subdomains corresponds to a structure in one to-be-simulated array antenna; subdividing each of the subdomains by a tetrahedral network to obtain multiple tetrahedrons; obtaining a vector basis function of each edge of each of the tetrahedrons according to vertex positions and lengths of the edges of the tetrahedron; and calculating an electric field value and a magnetic field value of any point in a tetrahedron to which each of the edges belongs using a vector basis function corresponding to the edge and a double curl electric field wave equation of a subdomain to which the edge belongs.

Abstract: A new process for the preparation of ethylbenzene by alkylation of benzene with dilute ethylene contained in dry gas by catalytic distillation and the apparatus used therefor are disclosed. The new process includes the pretreatment of raw refinery dry gas, the gas-liquid-solid three phases alkylation of benzene with the ethylene over a solid catalyst in a catalytic distillation tower, and concurring course of distillation separation of product mixture. The performance, type, and loading way of catalyst and distillation packing should satisfy the given requirements. The invention has many advantages such as simple apparatus structure and ease in operation, moderate operation conditions, large catalyst capacity, high product quality, long catalyst lifetime, etc.

Abstract: A new process for the preparation of ethylbenzene by alkylation of benzene with dilute ethylene contained in dry gas by catalytic distillation and the apparatus used therefor are disclosed. The new process includes the pretreatment of raw refinery dry gas, the gas-liquid-solid three phases alkylation of benzene with the ethylene over a solid catalyst in a catalytic distillation tower, and concurring course of distillation separation of product mixture. The performance, type, and loading way of catalyst and distillation packing should satisfy the given requirements. The invention has many advantages such as simple apparatus structure and ease in operation, moderate operation conditions, large catalyst capacity, high product quality, long catalyst lifetime, etc.