Abstract: A CA plug-in file is divided into file blocks and file pieces in turn, and the file pieces are encapsulated into service data packets and data units in turn; a frame header is encapsulated in a multiplexing frame after the value of a “plug-in update identification” field configured in the multiplexing frame header is set to be valid, and the data unit is encapsulated in a data segment of the multiplexing sub-frame; and the encapsulated multiplexing frame is modulated to an electromagnetic wave of a physical channel sent to the air.

Abstract: A method and a device for transmitting emergency broadcast are disclosed. The method comprises: when a terminal is powered on and a TV application module of the terminal is turned off, the terminal activating an emergency broadcast background module; a tuner sending a multiplexing frame obtained by tuning to the emergency broadcast background module; the emergency broadcast background module analyzing out emergency broadcast information after receiving the multiplexing frame.

Abstract: A method and device for updating a multimedia broadcast conditional access plug-in, wherein the sending steps of the front end include: a CA plug-in file is divided into file blocks and file pieces in turn, and the file pieces are encapsulated into service data packets and data units in turn; a frame header is encapsulated in a multiplexing frame after the value of a “plug-in update identification” field configured in the multiplexing frame header is set to be valid, and the data unit is encapsulated in a data segment of the multiplexing sub-frame; and the encapsulated multiplexing frame is modulated to an electromagnetic wave of a physical channel sent to the air.

Abstract: A cracking catalyst for the production of light olefins comprises 0-70% (based on the weight of the catalyst) of clay, 5-99% of inorganic oxides, and 1-50% of zeolite. The zeolite in the catalyst is a mixture of 0-25 wt % of REY or high silica Y zeolite and 75-100 wt % of phosphorus and rare earth containing high silica zeolite having a structure of pentasil. The catalyst exhibits higher hydrothermal activity-stability, conversion level, and C.sub.2 -C.sub.4 olefin yields in cracking reaction, comparing with the catalyst using HZSM-5 zeolite as active component.