Abstract: A hyaluronic acid facial mask, a preparation method therefor and a use method therefor is provided. The facial mask includes a substrate layer, a hyaluronic acid layer and a protective paper layer sequentially arranged. The hyaluronic acid layer is made of hyaluronic acid nanofibers. The hyaluronic acid nanofibers are formed by spinning a hyaluronic acid composite using an electrospinning method. The hyaluronic acid composite includes a dispersed phase and a solvent phase. The dispersed phase includes, in terms of mass percentage content, 70-95% of hyaluronic acid. The solvent phase includes water. The preparation method includes: spinning the hyaluronic acid composite on the substrate layer using an electrospinning method to form a hyaluronic acid layer, and then attaching the protective paper layer on the hyaluronic acid layer.

Abstract: There is provided a programmable high-frequency high-gain equalizer for digital display interfaces comprising, two pairs of current sources; two pairs of transistors arranged as two differential pairs, each transistor connected to a different one of the current sources; and a pair of a negative impedance resistors connected to the two pairs of two differential pairs; and a pair of capacitive and programmable resistive degeneration connected to the two pairs of two differential pairs to optimize the equalizer gain.