3 results about "Normal conditions" patented technology

The invention discloses a strip steel exit thickness prediction method by a symmetric extreme learning machine (Sym-ELM) optimized by a random frog leaping algorithm. Symmetry prior information is firstly added to the traditional extreme learning machine, the improved extreme learning machine can process a class of data containing symmetric properties, a symmetric extreme learning machine is put forward, the improved Sym-ELM algorithm is further optimized, the random frog leaping algorithm is used to select the input weight and the hidden layer bias value of the Sym-ELM algorithm, the optimized extreme learning machine is used for strip steel exit thickness prediction, and optimization on the symmetric extreme learning machine algorithm not only minimizes a root mean square error value but also considers a normal condition number of the output matrix of the hidden layer. The experiment shows that in comparison with the traditional extreme learning, the prediction performance of the traditional extreme learning machine to process the strip steel data containing the symmetric properties is improved, prediction errors of the model are reduced, and the generalization performance of the model is improved.

The invention discloses a fan lamp. The fan lamp comprises a fixed tray, wherein an invisible fan blade main body is arranged above the fixed tray; a main lamp body is fixedly arranged below the fixedtray; a plurality of auxiliary lamp bodies are equidistantly arranged on the outer edge of the fixed tray; and the plurality of auxiliary lamp bodies form an annular array, and light rays of the auxiliary lamp bodies are consistent and form an inclination angle of 30-60 degrees downward with the horizontal plane. The fan lamp with the above structure is provided with a plurality of auxiliary lampbodies on the outer periphery of the main lamp body, so that the illumination range of the fan lamp can be increased; and an inclination angle of 30-60 degrees downward is formed between the light rays of the auxiliary lamp bodies and the horizontal plane, so that the light rays of the lamp cannot harm eyes when a person looks up. Furthermore, the fan lamp is provided with the invisible fan blademain body, blades are in a contraction state under normal conditions, and the blades are stretched under the action of centrifugal force after a motor rotates to perform fan operation; and when not in use, the blades are not exposed, dust is prevented from falling on the blades, and the occupied space is small.