Abstract: Image encryption and decryption methods based on biological information. The encryption method includes: obtaining the biological information; using the chaotic mapping method to preprocess the biological information to construct the first chaotic biological phase plate and the second chaotic biological phase plate; obtaining the original image to be encrypted and use the first chaotic biological phase plate and the second chaotic biological phase plate to determine the reconstructed optical encrypted image based on the discrete cosine transform method, and Fresnel transform method; and inputting reference light that interferes with the encrypted image of the reproduction light to determine the encrypted image. The invention can reduce the information amount of the key, improve the efficiency of storage and transmission, and improve security.

Abstract: Image encryption and decryption methods based on biological information. The encryption method includes: obtaining the biological information; using the chaotic mapping method to preprocess the biological information to construct the first chaotic biological phase plate and the second chaotic biological phase plate; obtaining the original image to be encrypted and use the first chaotic biological phase plate and the second chaotic biological phase plate to determine the reconstructed optical encrypted image based on the discrete cosine transform method, and Fresnel transform method; and inputting reference light that interferes with the encrypted image of the reproduction light to determine the encrypted image. The invention can reduce the information amount of the key, improve the efficiency of storage and transmission, and improve security.

Abstract: The present disclosure provides an interference reduction method and apparatus. The method includes obtaining a current communication frequency of a radio frequency system of an electronic device; and determining a first operating frequency of a first interface of the electronic device according to the current communication frequency, wherein a current radio frequency communication frequency of a current serving cell of the radio frequency system is not a multiple of a divide-by-four frequency of the first operating frequency.

Abstract: The present disclosure provides an interference reduction method and apparatus. The method includes obtaining a current communication frequency of a radio frequency system of an electronic device; and determining a first operating frequency of a first interface of the electronic device according to the current communication frequency, wherein a current radio frequency communication frequency of a current serving cell of the radio frequency system is not a multiple of a divide-by-four frequency of the first operating frequency.

Abstract: A double-stator permanent magnetic direct-driven wind power generator supported by a fixed shaft (17) includes a wheel hub (1), the fixed shaft, a front bearing (15), shaft sleeves (16), a back bearing (18), a front bearing end cover (2), back bearing positioning elements (19), hollow rotating shafts (3), a rotor disk (5), a rotor (8), an outer stator (7), an inner stator (9), an inner stator bracket (11), a generator front end cover (4), a generator shell (6) and a frame (14). The fixed shaft is connected with the frame; the front bearing and the back bearing are mounted on the fixed shaft; the shaft sleeves are sleeved on the fixed shaft and arranged between inner rings of the front bearing and the back bearing; the back bearing locating elements are arranged outside the back bearing; the hollow rotating shafts are sleeved on the front and back bearings of the fixed shaft; the front bearing end cover is connected with the hollow rotating shafts. The generator reduces weight and cost greatly.