Abstract: The disclosure discloses a liquid foundation using starch as a filler and a preparation method thereof, belonging to the technical fields of deep processing of starch and preparation of cosmetics. In the disclosure, starch is modified by an OSA reagent and then homogenized and micronized to obtain a starch filler; powder materials and the water phase in the formula of the liquid foundation are sequentially added to the oil phase at a certain temperature; the mixture is sheared at low speed, homogenized, and cooled to room temperature; and the starch filler is added to prepare the liquid foundation using starch as a filler, wherein the formula includes 10-20 parts of oil phase, 65-75 parts of water phase, 5-10 parts of toner, and 5-15 parts of starch filler.

Abstract: Disclosed is an M-ary direct sequence spread spectrum communication method. The method involves: filling a one-bit M-ary-number of code elements between two spread spectrum sequence codes; and during despreading, obtaining the number of code elements filled between the two spread spectrum sequence codes so as to obtain one-bit M-ary data. Provided is a spread spectrum communication method having high communication efficiency.

Abstract: Disclosed is an M-ary direct sequence spread spectrum communication method. The method involves: filling a one-bit M-ary-number of code elements between two spread spectrum sequence codes; and during despreading, obtaining the number of code elements filled between the two spread spectrum sequence codes so as to obtain one-bit M-ary data. Provided is a spread spectrum communication method having high communication efficiency.