24 results about "Diffraction spectrum" patented technology

The application provides a positive electrode sheet, a battery and an electric device. The positive electrode sheet comprises a lithium iron manganese phosphate material, the X-ray crystal diffraction spectrum of the positive electrode sheet comprises a characteristic peak of a (200) crystal face with 2θ of 17.2±0.5° and a characteristic peak of a (020) crystal face with 2θ of 29.7±0.5°; the average stacking size D(200) on the (200) crystal face, the average stacking size D(020) on the (020) crystal face and the average particle size D 平均 satisfy the following relationships: D(200) / D(020)≥1.15 and 10%≤D(200) / D 平均 ≤30%. The application makes the positive electrode sheet have high lithium ion diffusion rate and cycle stability by special crystal structure and particle size limitation, and further makes the battery have excellent cycle performance and rate performance.

A solid electrolyte containing a molecular crystal and a fluorine-containing polymer, the molecular crystal including an organic molecule having at least one kind of atom selected from a sulfur atom, an oxygen atom, a nitrogen atom, and a phosphorus atom, and an alkali metal salt, the solid electrolyte having a diffraction spectrum derived from the molecular crystal in X-ray diffraction.

The application discloses a self-supporting thin film photocathode design method for improving the dynamic range of a transmission grating spectrometer, and the photocathode is designed by using a self-supporting thin film and an equal-width photocathode slit, so that the difference in photoelectron density in the high-energy area and the low-energy area of a diffraction spectrum is reduced, the dynamic range of the time-resolved transmission grating spectrometer is improved, and the time resolution of the spectrometer along the length direction of the photocathode is kept unchanged. Compared with a conventional equal-width photocathode and a flat-response photocathode, the self-supporting thin film photocathode can reduce the difference in photoelectron density in the high-energy area and the low-energy area of the diffraction spectrum on the photocathode, and improve the dynamic range of the spectrometer. Compared with a width-second-gradual photocathode, the self-supporting thin film photocathode can keep the time resolution of the time-resolved transmission grating spectrometer along the length direction of the photocathode unchanged, and solve the problem that the quantitative spectral analysis is difficult due to the change of the time resolution of the width-second-gradual photocathode along the length direction of the photocathode.

A machine vision task, machine learning task, and / or classification of objects is performed using a diffractive optical neural network device. Light from objects passes through or reflects off the diffractive optical neural network device formed by multiple substrate layers. The diffractive optical neural network device defines a trained function between an input optical signal from the object light illuminated at a plurality or a continuum of wavelengths and an output optical signal corresponding to one or more unique wavelengths or sets of wavelengths assigned to represent distinct data classes or object types / classes created by optical diffraction and / or reflection through / off the substrate layers. Output light is captured with detector(s) that generate a signal or data that comprise the one or more unique wavelengths or sets of wavelengths assigned to represent distinct data classes or object types or object classes which are used to perform the task or classification.

A coated steel sheet with low brightness from the moment of preparation and suppressed coating peeling is provided. The coated steel sheet of the present invention has a coating consisting of Al of 1.0 to 22.0% by mass, Mg of 1.5 to 10.0% by mass, and the remainder being Zn and any trace additives. The lightness L of the surface of the coated steel plate is less than 50, and the X-ray diffraction spectrum obtained by X-ray diffraction satisfies all of the following conditions (1) to (3): (1) A / B is more than 0.001 and less than 0.015; (2) A / C is more than 1.2; (3) The half-width d of the peak of A is more than 0.30 degrees and less than 1.00 degrees, where A is the peak intensity of the peak representing the 100 plane of ZnO that appears at 31.27 degrees or more and between 32.27 degrees, B is the peak intensity of the peak representing the 101 plane of Zn that appears at 42.73 degrees or more and between 43.73 degrees, and C is the intensity at 30.00 degrees of 2θ.

Lithium ion conductors, lithium batteries including the same, and methods of making lithium ion conductors. The lithium ion conductors include: a first compound represented by Formula 1; and a second compound represented by Formula 2, wherein the lithium ion conductor has a first peak at a diffraction angle (2θ) of 23.8° to 24.5° in an X-ray diffraction spectrum, wherein Formula 1 and Formula 2 are as described herein.

The application relates to the field of crystal structure symmetry classification and retrieval, and specifically discloses a crystal structure symmetry determination and retrieval method using electron diffraction, which comprises the following steps: a multi-view selected area electron diffraction data input module is used to acquire a two-zone axial diffraction spectrum and perform pretreatment; a symmetry feature coding module is used to extract a single-view descriptor through a double-branch convolutional neural network, to obtain a material descriptor through view pooling fusion; a hierarchical symmetry classification module is used to realize hierarchical classification of crystal systems and space groups, and to guarantee the logic of the results through consistency constraints; a high-dimensional feature embedding and database construction module is used to standardize crystal structure files, to generate descriptors, and to construct a vector database; and a constrained structure retrieval module is used to combine the classification results and user constraints to filter candidate structures, and to complete retrieval through cosine similarity. The application solves the problems of poor generalization, insufficient multi-view feature fusion and inability to associate a crystal library in the prior art, and realizes full-process automation of crystal structure symmetry classification and retrieval.

The application discloses an airborne particulate matter lens-free diffraction online detection and distribution positioning method, belongs to the technical field of intelligent environment monitoring, collects aerosol diffraction images and meteorological data, constructs a diffraction spectrum meteorological space-time alignment set through timestamp alignment; extracts frequency spectrum energy distribution characteristics and ring characteristics to input a deep inversion model, introduces humidity, wind speed and temperature, combines a preset threshold correction weight, inverts particulate matter equivalent diameter distribution and concentration, generates a particulate matter basic parameter set, deduces a high-probability source area based on a concentration gradient and a meteorological wind field direction, generates an initial source area estimation map; combined with constraint conditions, a constraint type reverse trajectory tracing model is constructed to deduce a particulate matter propagation path; a concentration and position error feedback mechanism is adopted to construct a joint loss function to iteratively optimize path initial weight and source area intensity distribution, correct the propagation path and positioning, output particulate matter online detection results and high-resolution spatial distribution positioning maps, and realize accurate tracing and monitoring.

A lithium-ion conductor and an all-solid-state battery including the lithium-ion conductor. The lithium-ion conductor including: a first compound represented by Formula 1; and a second compound represented by Formula 2, wherein the lithium-ion conductor has a first peak at a diffraction angle (2θ) of 23.8° to 24.5° in an X-ray diffraction spectrum:wherein Formula 1 and Formula 2 are as described herein.

The application discloses a kind of detection methods, device and equipment of diffractive optical waveguide and storage medium, it is related to optical testing technical field, method includes: obtaining the target diffractive optical waveguide in the coupling-in region multiple sampling points target diffraction spectrum;Respectively, each target diffraction spectrum is compared with preset simulation diffraction spectrum, determine whether there is abnormal sampling point in each sampling point;Through laser irradiation coupling-in region, the light energy value of each sampling region in the coupling-out region of target diffractive optical waveguide is collected, and target light energy distribution diagram is obtained;Target light energy distribution diagram is compared with preset simulation light energy distribution diagram, determine whether there is abnormal sampling region in each sampling region.The application is by setting multiple sampling points, detection is carried out to each point position in whole region uniformly, the range of each test is larger, and test speed is faster, to improve the test efficiency of grating structure area of diffractive optical waveguide.

The present invention provides crystals of a compound or salt thereof that has EGFR inhibitory activity, exhibiting good stability (thermal, purity) and / or low hygroscopicity. [Solution] According to one aspect of the present invention, a crystalline form of (S)-N-(4-amino-6-methyl-5-(quinoline-3-yl)-8,9-dihydropyrimido[5,4-b]indolidine-8-yl)acrylamide is provided, in which the diffraction angle (2θ±0.2°) has a peak at a predetermined angle in the powder X-ray diffraction spectrum.

The present application belongs to the technical field of medicine crystal form, and particularly relates to a crystal form of lasmiditan-mellitic acid and a preparation method thereof. The crystal structure of the crystal form of lasmiditan-mellitic acid provided by the present application has a molar ratio of 1:1:2 of lasmiditan, mellitic acid and water, and an X-ray diffraction spectrum expressed in 2θ using Cu-Kα radiation has characteristic peaks at 6.59±0.2°, 10.73±0.2°, 16.14±0.2°, 23.62±0.2° and 24.10±0.2°. The crystal form is stable, has high solubility, is beneficial to the storage of the bulk drug, is beneficial to the improvement of the drug utilization, makes the drug better play a therapeutic role, has better tensile strength, improves the compression formability, and is convenient for the application of the preparation.

The present disclosure relates to a composite catalyst comprising: a hierarchical porous zeolite support; and cobalt-based nanoparticles supported on the support, wherein the zeolite support has, in an X-ray diffraction spectrum, a first peak (IA), which is the maximum peak in the range of 2θ= 23.0-23.50°, and a second peak (IB), which is the maximum peak in the range of 2θ= 29.50-30.50°, the intensity ratio of the first peak to the second peak satisfies expression 1, and the full width at half maximum (FWHM) (deg, 2θ) of the first peak (IA) is 0.425 or more. [Expression 1] 5.5< IA / IB <10.55

This invention discloses a method and system for measuring grating parameters based on Physical Information Mode Decomposition (VMD) and a dual-path Transformer, aiming to address the problems of strong nonlinearity and high non-stationarity of diffraction spectra in traditional scattering measurements, as well as the lack of physical constraints in existing deep learning models. The method includes: acquiring the diffraction efficiency spectrum of the grating under specific polarization and incident conditions; optimizing the parameters of the variational mode decomposition using a Newton-Raphson optimization algorithm with embedded physical information, and decomposing the spectrum into physically meaningful intrinsic mode functions (IMFs) by constructing a fitness function that includes envelope entropy and Bragg diffraction frequency matching; constructing a dual-path Transformer model to extract the temporal and spatial statistical features of the IMFs through temporal and spatial paths respectively, and fusing them through a cross-attention mechanism; and finally regressing the critical size of the output grating. This invention significantly improves the accuracy and robustness of grating measurements through physically constrained signal decomposition and dual-path feature extraction.

The application discloses a method for measuring close-packed hexagonal lattice constant based on space plane fitting, which comprises the following steps: firstly, obtaining the X-ray diffraction spectrum of a close-packed hexagonal crystal and indexing; secondly, converting the crystal plane spacing formula into a three-dimensional space plane equation through mathematical transformation; thirdly, calculating a plurality of groups of data according to the measured diffraction angle and performing space plane fitting to obtain a space plane equation containing an intercept; fourthly, introducing a goniometer zero drift error correction quantity to perform multiple iteration correction on the measured angle until the absolute value of the intercept of the fitting plane tends to be zero, so that the accurate value is obtained; and finally, calculating the high-precision lattice constant. The application converts the complex parameter fitting problem into an intuitive space plane fitting and intercept correction process, has clear principle and strong operability, and effectively improves the measurement precision of the close-packed hexagonal lattice constant.

The application provides a two-phase dispersion distributed lithium-rich manganese-based positive electrode material and a preparation method thereof and a lithium ion battery, and relates to the technical field of battery positive electrode material preparation. In a diffraction spectrum obtained by using an XRD instrument with Cu-K alpha as an incident light source, the value range of A of the half-peak width ratio A of the LiMn6 peak with 2 theta located at 20.6+ / -0.1 degree and the (003) peak with 2 theta located at 18.6+ / -0.1 degree is 0.5<=A<=1.8. The application greatly improves the kinetics of the solid-phase sintering reaction of the lithium-rich manganese-based material by optimizing the sintering process of the lithium-rich manganese-based material, promotes the reaction to be more thorough, makes the two-phase distribution of the lithium-rich manganese-based material more uniform, the layered structure more ordered and stable, and the lithium-rich manganese-based material exhibit higher specific capacity and longer cycle life.

The application discloses a tungsten carbide crystallinity determination method and device, electronic equipment and storage medium. The tungsten carbide crystallinity determination method comprises the following steps: obtaining an X-ray diffraction spectrum of tungsten carbide; performing first differential characterization on the X-ray diffraction spectrum to obtain a completeness index; performing second differential characterization on the X-ray diffraction spectrum to obtain a coarsening index; and calculating the crystallinity index of the tungsten carbide according to the completeness index and the coarsening index. The WC crystallinity determination method can be used for detecting WC powder, and the crystallinity of the WC powder can be semi-quantitatively determined, so that the quality of the WC powder can be more comprehensively controlled.

Provided is a photoelectric conversion element having improved conversion efficiency. The photoelectric conversion element includes a first electrode, a second electrode, and a photoelectric conversion layer disposed between the first electrode and the second electrode, the photoelectric conversion layer including a crystal having a perovskite structure. The photoelectric conversion element includes a charge transport layer including a phthalocyanine crystal between the photoelectric conversion layer and the first electrode. In an X-ray diffraction spectrum of the phthalocyanine crystal using CuKα, a peak exists in a range of 28.0° or more and 29.0° or less in Bragg angle 2θ, and a lattice spacing d1 [nm] calculated from the value of 2θ of the peak satisfies 0.3100 ≤ d1 ≤ 0.3160.

Provided are a photoelectric conversion element having improved conversion efficiency, and a photoelectric conversion device. A photoelectric conversion element having a photoelectric conversion layer (7) containing a crystal having a perovskite structure is provided, and is characterized in that: the photoelectric conversion element has a charge transport layer (8) containing a crystal of a cyclic conjugated compound in which a plurality of pyrrole rings are conjugated and bonded between the photoelectric conversion layer (7) and a first electrode (9); in an X-ray diffraction spectrum of the charge transport layer (8) obtained using CuKα rays, if peak α is a peak having the greatest intensity among peaks present in a range of 5.0° to 8.0°, and peak β is a peak having the greatest intensity among peaks present in a range of 26.0° to 29.0°, then peak α or peak β is a peak having the greatest intensity in the scanning range; and if Iα is the intensity of peak α and Iβ is the intensity of peak β, then Iα / Iβ is 2.0 or less.

This invention discloses a method for calculating the reference intensity of X-ray diffraction mineral quantitative analysis, relating to the field of oil and gas exploration and development technology. This invention utilizes the X-ray diffraction full-spectrum fitting method to design an initial crystal structure model of the mineral, construct a theoretical X-ray diffraction spectrum, refine the mineral crystal structure parameters and peak shape function parameters, fit the mineral percentage content, and derive the required reference intensity K value using the mineral percentage content calculation formula from the standard (SY / T5163-2018) "X-ray Diffraction Analysis Method for Clay Minerals and Common Non-Clay Minerals in Sedimentary Rocks". This allows for the true realization of quantitative X-ray diffraction mineral analysis for sedimentary rocks, igneous rocks, and metamorphic rocks.

The application discloses a kind of full-optical time-domain pulse width measuring device and method based on perturbation self-diffraction effect, existing frequency domain measurement technique is difficult in the technical problem of measuring periodicity order pulse, specifically including beam splitter, delay unit, beam combiner, light splitter, first focusing mirror, nonlinear grating, filter plate and spectrometer;Beam splitter is used to divide the light to be measured into reflected light and transmitted light;Delay unit is arranged on the light path where the transmitted light is, for delaying the transmitted light;Beam combiner is used to combine the reflected light and the transmitted light after the action of delay unit, to form combined light;Light splitter, first focusing mirror, nonlinear grating, filter plate and spectrometer are sequentially arranged on the light path where the combined light is along the emission direction;Nonlinear grating is used to make focused light beam produce self-diffraction signal;Filter plate is used to extract first-order self-diffraction signal from self-diffraction signal to spectrometer, so that the spectrometer obtains corresponding self-diffraction spectrum intensity data.