Abstract: Provided is a fusion protein of human serum albumin or a wild type thereof and human interleukin-2 or a mutation thereof, said fusion protein has a significantly extended in vivo half-life relative to recombinant interleukin-2, can be used alone for treating a tumor, and improves anti-tumor efficacy of an anti-PD-1 antibody or an anti PD-L1-antibody.

Abstract: The present application relates to a backplate for a recording microphone, and the recording microphone, belonging to the technical field of acoustoelectric conversion. A surface, facing a diaphragm, of the backplate is a spherical surface recessed away from the diaphragm. According to the backplate for the recording microphone and the recording microphone provided by the present application, the maximum sound pressure level that the recording microphone can withstand is effectively increased, and the occurrence of attachment between the diaphragm and the backplate under the action of high-sound-pressure-level signals is reduced.

Abstract: The present application relates to a backplate for a recording microphone, and the recording microphone, belonging to the technical field of acoustoelectric conversion. A surface, facing a diaphragm, of the backplate is a spherical surface recessed away from the diaphragm. According to the backplate for the recording microphone and the recording microphone provided by the present application, the maximum sound pressure level that the recording microphone can withstand is effectively increased, and the occurrence of attachment between the diaphragm and the backplate under the action of high-sound-pressure-level signals is reduced.

Abstract: A LED heat-dissipating downlight includes an enclosure body, a light source board, and a driving board. The enclosure body has a side opening. The accommodating chamber is substantially made of a heat dissipation material. The light source board and the driving board are disposed in the accommodating chamber. The light source board is disposed on a bottom of the accommodating chamber, and thermally contacted to the accommodating chamber. The driving board is disposed on the light source board. The driving board has a spacing hole, and the light generated by the light source board passes through the spacing hole to the side opening of the accommodating chamber.