8 results about "Absorption index" patented technology

This invention belongs to the technical field of oil well logging equipment and discloses a four-detector lithology density electrode device and detection method, comprising: a housing assembly, inside which are arranged sequentially a first far detector, a first near detector, a source chamber, a second near detector, and a second far detector; the distances of each detector from the source chamber, from largest to smallest, are: second far detector, first far detector, first near detector, and second near detector. This invention uses four detectors, namely the first far detector, the first near detector, the second far detector, and the second near detector. Each detector acquires density logging curves and lithology logging curves by collecting data. Moreover, if any one detector fails, the remaining three detectors can still generate two volumetric density values ​​and at least one formation photoelectric absorption index cross-section value, obtaining the volumetric density and formation photoelectric absorption index cross-section. The entire machine can still guarantee measurement accuracy and perform normal well logging.

Method for determining the layer thicknesses of a sample with a known plurality N of superimposed layers S i , with i = 1, 2, 3, ..., N, with the steps: a) Generating pulses of electromagnetic high-frequency radiation with a predetermined frequency bandwidth, b) Irradiating the sample with electromagnetic high-frequency radiation and c) Time-resolved measurement of the electric field E P (t) the electromagnetic radiofrequency radiation reflected by or transmitted through the sample, d) Selecting a layer thickness d i , an absorption index k i and a refractive index n i for each layer S i , with i = 1, 2, 3, ..., N, e) Calculating a time-dependent electric field E M(t) for the electromagnetic high-frequency radiation reflected by or transmitted through the sample using a model, wherein the model defines a time-dependent electric field E according to the number N+1 interfaces between the measurement environment and the sample, as well as between the individual layers. j (t), with j = 0, 1, 2, 3, ..., N, taken into account, where the electric fields E j (t) depending on the layer thicknesses d i , the absorption indices k, which are assumed to be constant over the frequency bandwidth of the electromagnetic high-frequency radiation used i and the refractive indices n, which are assumed to be constant over the frequency bandwidth of the electromagnetic high-frequency radiation used. i to the time-dependent electric field E M (t) are added, f) Comparing the calculated electric field E M (t) with the detected electric field E P(t) g) when there is a deviation Q between the calculated electric field E M (t) and the detected electric field E P (t) is greater than a predetermined tolerance T, the layer thicknesses d i , the refractive indices n i and the absorption indices k i as long as the deviation Q is varied and steps e) to g) are repeated until the deviation Q is smaller than the tolerance T, and h) Providing the layer thicknesses d i as a result of the layer thickness determination, characterized in that initially for step d) and for a predetermined number of L repetitions of steps e) to g) the absorption index k i is selected from a range of values ​​that is small compared to the expected range of values ​​that the absorption index k represents. i for the respective shift S i a sample can assume and which is in relation to the maximum expected absorption index k ifor the respective layer includes small absorption indices.

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 invention relates to the technical field of maxillofacial correction, in particular to a maxillofacial solution recommendation method and system based on a cloud platform, and the method comprises the steps: obtaining maxillofacial device wearing data of a first object, generating at least one first maxillofacial adjustment scheme according to the wearing data difference between the actual wearing data and the recommended wearing data; generating a first absorption index of the first object according to the maxillofacial type and / or the medical background index; searching historical execution effects of a plurality of second objects corresponding to the first absorption index from the second database; correspondingly generating the execution difficulty index according to the historical execution effect; and outputting a second maxillofacial adjustment scheme through at least one first maxillofacial adjustment scheme according to the execution difficulty index. According to the method, the efficiency of the maxillofacial correction process can be greatly improved through targeted recommendation of the maxillofacial solution, and the user experience is improved.

The invention relates to the technical field of real-time monitoring of skin spectral characteristics, in particular to an adjustable spectral irradiation control method for silicon substrate multi-primary-color LED beauty. The method comprises the following steps: collecting a reflection spectrum, and synchronously collecting a pulse signal of a user; performing ambient light interference elimination on the reflection spectrum to obtain corrected spectrum data; performing skin characteristic and spectral absorption analysis according to the corrected spectral data to obtain a skin basic parameter group, a skin characteristic distribution map and a skin spectral absorption index; performing skin type comprehensive judgment and partitioning according to the skin basic parameter group and the skin characteristic distribution map to obtain a skin type partitioning map; according to the pulse signal of the user and the skin spectrum absorption index, microcirculation dynamic characteristic calculation is carried out, and a microcirculation area distribution diagram is obtained. According to the invention, the illumination parameters are dynamically adjusted through real-time feedback of the skin, so that personalized, precise, safe and effective LED beautifying is realized.

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.