Abstract: A display apparatus, including: a display panel; a supporting layer, provided on a backlight side of the display panel; a circuit board, provided on a side of the supporting layer away from the display panel; and a shielding layer, overlaid on a side of the circuit board away from the display panel and including a first insulation layer and a conductive layer. The conductive layer includes a shielding portion and a leading-out portion; the first insulation layer exposes at least partial region of the leading-out portion; an orthographic projection of the shielding portion on the display panel is located within an orthographic projection of the circuit board on the display panel; an orthographic projection of the leading-out portion on the display panel is located outside the orthographic projection of the circuit board on the display panel; the leading-out portion is electrically connected to the supporting layer.

Abstract: The present invention discloses a low carbon ultra-high performance engineered geopolymer composite and its preparation method and application, which belongs to the technical field of building materials, an activator used therein is a NaOH—Na2SiO3 activator as a basic activator, and Na2CO3 is used as a supplementary activator to form a low carbon composite activator. The preparation method comprises the following steps: (1) after mixing uniformly the cementitious material powder, barium chloride, and defoaming agent, adding successively quartz sand, activator, water reducer, nano calcium carbonate and PE fiber and stirring uniformly to obtain a slurry; (2) pouring and forming the obtained slurry and maintaining, then obtaining the low carbon ultra-high performance engineered geopolymer composite.

Abstract: The present invention discloses a low carbon ultra-high performance engineered geopolymer composite and its preparation method and application, which belongs to the technical field of building materials, an activator used therein is a NaOH—Na2SiO3 activator as a basic activator, and Na2CO3 is used as a supplementary activator to form a low carbon composite activator. The preparation method comprises the following steps: (1) after mixing uniformly the cementitious material powder, barium chloride, and defoaming agent, adding successively quartz sand, activator, water reducer, nano calcium carbonate and PE fiber and stirring uniformly to obtain a slurry; (2) pouring and forming the obtained slurry and maintaining, then obtaining the low carbon ultra-high performance engineered geopolymer composite.

Abstract: A display module includes a flexible display panel including a display portion, a binding portion, and a bending portion; a first back film, a second back film fitted to the display portion and the binding portion, respectively, an auxiliary support layer located between the first and second back films, bonded with the back films through first and second adhesive layers, respectively, and provided with an elastic modulus greater than the first and second back films; orthographic projections of the back films are located in or overlaps with those of the display portion and the bind portion, respectively. Side edges of the first and second back films and the auxiliary support layer close to the bending portion are first, second and third side edges, respectively; a spacing between the third and first side edges and a spacing between the third and second side edges are 0-0.35 mm.

Abstract: A lattice-based proxy signature method, apparatus and device, a lattice-based proxy signature verification method, apparatus and device, and a storage medium. Polynomials are randomly selected in rings to calculate public and private keys of nodes, and the magnitudes of proxy public and private keys are the same as the magnitudes of public and private keys of an original signer. Therefore, compared with existing proxy signature schemes, the present application has smaller lengths of public and private keys and higher storage efficiency. Proxy signature information generated in the present application shows a signature of the original signer and also shows a signature of a proxy signer. Once a proxy signature is created, the proxy signature cannot be repudiated by the proxy signer, and has strong non-repudiation and strong unforgeability. The proxy signature method has the advantage of resisting quantum computer attack.

Abstract: The present application provides a display panel and a display device. The display panel includes a frame. The frame includes a light-facing portion and a backlight portion, wherein the backlight portion faces a light-shielding region and is provided as a light to guide the lights emitted from the side light source toward the frame to the light-shielding region. The backlight portion of the frame is provided as a light guide to guide the lights to the light-shielding region to improve the brightness of the light-shielding region on the display screen, so that the overall brightness of the display screen is more uniform and the display effect is improved.

Abstract: The present application provides a display panel and a display device. The display panel includes a frame. The frame includes a light-facing portion and a backlight portion, wherein the backlight portion faces a light-shielding region and is provided as a light to guide the lights emitted from the side light source toward the frame to the light-shielding region. The backlight portion of the frame is provided as a light guide to guide the lights to the light-shielding region to improve the brightness of the light-shielding region on the display screen, so that the overall brightness of the display screen is more uniform and the display effect is improved.

Abstract: A ventilation and noise reduction system for centralized cooling towers includes a wind outlet sound-reduction structure, a wind inlet sound-reduction channel, a rainwater collection system, and an arrestor device; wherein the integrated sound-absorbing and sound-insulation shed includes a loading-bearing installation structure for a lifting ring, a concrete foundation, a bearing support structure, a ceiling installation structure, a sound-insulation structure and a lighting and sound-insulation structure.

Abstract: A ventilation and noise reduction system for centralized cooling towers includes a wind outlet sound-reduction structure, a wind inlet sound-reduction channel, a rainwater collection system, and an arrestor device; wherein the integrated sound-absorbing and sound-insulation shed includes a loading-bearing installation structure for a lifting ring, a concrete foundation, a bearing support structure, a ceiling installation structure, a sound-insulation structure and a lighting and sound-insulation structure.