Abstract: The present disclosure relates to a side object-holding device, a connection mechanism, a canopy structure, and a carrier. The side object-holding device includes an object holder and a first mounting assembly. The object holder has an object-holding cavity. The first mounting assembly is arranged on an outer wall of the object holder, and the object holder is mounted on an outer side of a rotational joint of the carrier through the first mounting assembly. In the above side object-holding device, the object holder can be mounted on the outer side of the rotational joint of the carrier through the first mounting assembly.

Abstract: An epoxy resin composition, a transparent composite material including the same, and a laminated board. The epoxy resin composition includes an epoxy resin A and an epoxy resin B. The refractive index of the epoxy resin A is 1.54-1.8 and the light transmittance of the epoxy resin A is 90%. The refractive index of the epoxy resin B is 1.54-1.8 and the light transmittance of the epoxy resin B is greater than 90%. The epoxy resin A is an organosilicon modified epoxy resin. The epoxy resin B is another type of epoxy resin. The organosilicon modified epoxy resin satisfying a specific condition and another type of epoxy resin also satisfying the specific condition are combined to form a specific epoxy resin composition. The composite material prepared from the epoxy resin composition, a curing agent, and a curing accelerator has the advantages of having high light transmittance and high bending strength, and also has high bonding strength.

Abstract: An interface data transmission method and apparatus, an electronic device and a storage medium are disclosed. The interface data transmission method includes: acquiring a target content stream and a content stream key corresponding to the target content stream; encrypting the target content stream according to the content stream key to obtain encrypted stream ciphertext; acquiring content control information and a shared key of a decryption terminal, and encrypting the content stream key and the content control information according to the shared key to generate a content control information list; embedding the content control information list into the encrypted stream ciphertext to generate encrypted content stream data; and sending the encrypted content stream data to the decryption terminal.

Abstract: A data transmission method, an electronic device and a computer-readable storage medium are disclosed. The method is applied to a topological connection, the topological connection including a source node and first-level sub-nodes. The method includes: selecting, according to the source node, a first-level sub-node to which digital content is issued by the source node; establishing an authentication channel between the first-level sub-node and the source node; adjusting a counting parameter of the source node according to the authentication channel, and acquiring an authentication identifier of the first-level sub-node; and issuing the digital content to the first-level sub-node according to the authentication identifier if the adjusted counting parameter is smaller than a preset threshold.

Abstract: An acoustic array transducer capable of forming narrow dispersion, broadband or narrowband acoustic beam sets in two dimensions with a minimum aperture size. Concurrent yet independent electrical interfacing with array transducer elements allows simultaneous formation of multiple transmit and receive beams inclined within two planar orientations normal to the array face, while requiring a minimum amount of supporting circuitry. A method of economically and accurately fabricating the aforementioned transducer array by incrementally dicing bonded layers of solid discs of transducer materials being rigidly held together is also disclosed.