Abstract: Disclosed are an organic fertilizer of normal-temperature cold-pressed castor bean meal fermented by microbial inoculants, a preparation method and an application thereof, belonging to the technical field of fertilizers. The preparation method includes: S1, preparing normal-temperature cold-pressed castor bean meal; S2, preparing a fermentation microbial inoculant package, where microbial inoculants, enzymes and a culture substrate for activating fermentation microbial inoculants are added into the packaging bag of the microbial inoculant package according to a certain ratio to obtain the fermentation microbial inoculant package; and S3, fermenting the normal-temperature cold-pressed castor bean meal.

Abstract: A method of real-time transmission and demodulation of BeiDou satellite navigation signals, the method including: constructing a large-scale parallel signal transmission branch, grouping a satellite navigation message in a large scale and sequentially sending the grouped messages into the parallel signal transmission branch, obtaining a navigation satellite parallel transmission branch-dedicated sub-ranging code by using a non-linear function driven complex shift pseudo-random code generator and perform spectrum-spreading for the navigation message of each branch, performing modulation by same carrier with different frequency offsets, then forming a composite satellite navigation signal by superimposing carrier-modulated navigation signals of all branches and adding a noise, and sending the composite satellite navigation signal by a single antenna.

Abstract: A method of real-time transmission and demodulation of BeiDou satellite navigation signals, the method including: constructing a large-scale parallel signal transmission branch, grouping a satellite navigation message in a large scale and sequentially sending the grouped messages into the parallel signal transmission branch, obtaining a navigation satellite parallel transmission branch-dedicated sub-ranging code by using a non-linear function driven complex shift pseudo-random code generator and perform spectrum-spreading for the navigation message of each branch, performing modulation by same carrier with different frequency offsets, then forming a composite satellite navigation signal by superimposing carrier-modulated navigation signals of all branches and adding a noise, and sending the composite satellite navigation signal by a single antenna.