4 results about "Absorption index" patented technology

A weather strip with a low specific weight and a low water absorption index is provided. The weather strip to be attached to a car includes a hollow sealing portion with a hollow space formed inside, and the hollow sealing portion includes a foamed wall portion that is at least part of a wall forming the hollow space, which has bubbles formed inside, the number of bubbles being not less than 200 / mm2, at least some of the bubbles originating from a thermally expandable microcapsule, which has a thickness of not less than 1.0 mm and not more than 2.0 mm, and which has a specific gravity not greater than 0.45.

The invention relates to the technical field of hyperspectral remote sensing image intelligent processing and hydrocarbon substance identification, in particular to an absorption characteristic-based hyperspectral satellite image hydrocarbon substance intelligent identification algorithm, which comprises the following steps of: acquiring original data of a hyperspectral satellite image, and preprocessing to generate a surface reflectance data cube; a wave band near 1100 nm is selected as a feature recognition wave band, and spectrum confusion is avoided; dynamically searching a wave trough position in a range of 1095-1105 nm for each pixel spectrum curve, and establishing an absorption baseline; the absorption depth and the absorption area are calculated, and absorption characteristics are quantified; fusing the absorption depth, the absorption area and the trough screening result to generate a pixel-level absorption index map; and performing clustering analysis based on the absorption index spectrum, and outputting a hydrocarbon substance distribution confidence classification result. The algorithm adopts a dynamic wave band selection and multi-feature fusion mechanism, improves the accuracy and anti-interference performance of weak signal identification, and is suitable for oil-gas exploration and environment monitoring application.

The invention discloses a brown carbon optical property fine detection method based on key aromatic compound component analysis, and belongs to the technical field of environment monitoring and aerosol optical analysis. The method comprises the following steps: firstly, collecting an atmospheric fine particulate matter sample, and then extracting target aromatic compounds including nitrophenols, nitro polycyclic aromatic hydrocarbons and polycyclic aromatic hydrocarbons in the sample by utilizing pretreatment technologies such as ultrasonic extraction and nitrogen blowing concentration. And then, acquiring an absorption spectrum of each ACs component in a wavelength range of 300-550 nm by adopting a high performance liquid chromatography-diode array detector coupling technology. In addition, the target compound is quantified by adopting a high-sensitivity mass spectrometry, and the mass absorption coefficient and the absorption Angstrom index of each component are accurately calculated based on the quantification. According to the method, optical parameters of key molecular markers are accurately measured, so that refined evaluation based on light absorption contribution of molecular-level brown carbon is realized, and the defects that specific light absorption components cannot be distinguished and non-light-absorption organic matter interference cannot be eliminated in a traditional integral filter membrane extraction method are overcome.

The utility model provides an infrared radiation ceramic coating structure, and belongs to the technical field of high-temperature-resistant, high-radiance and functional materials. The infrared radiation ceramic coating structure comprises a matrix layer used for coating the surface of a structure to be coated; the radiation layer is arranged on the side, away from the to-be-coated structure, of the base body layer, and the radiation layer comprises a plurality of conical protruding structures arranged on the surface of the base body layer or a plurality of sunken structures sunken in the base body layer. Through the proper conical roughness of the surface of the base body layer, the scattering effect of a conical needle tip is exerted, the scattering surface area is increased, the scattering effect of heat radiation is enhanced, the projection depth of the material is increased, then the absorption index and the refraction index of the surface of the material are reduced, and therefore the radiance of the coating is improved.