20 results about "Fine structure" patented technology

The invention discloses a hybrid electromagnetic simulation method suitable for a multi-scale fine-structure antenna, and the method comprises the steps: firstly creating a multi-scale fine-structure antenna model which needs to be simulated, and determining the range of the size of the multi-scale fine-structure antenna model in a calculation space; constructing a convolution complete matching layer suitable for the hybrid implicit-explicit time domain finite difference method, determining a whole calculation space range including the convolution complete matching layer, then setting a non-uniform grid, and determining a fine region and a transition region from fine to rough; combining the three, adding an excitation source of an electric field, and then obtaining a convolution complete matching layer absorption item, a magnetic field value and an electric field value at the next moment; and finally updating the excitation source in the fine structure direction and updating the time step. According to the method, the hybrid implicit-explicit finite difference time domain method is efficiently combined with the non-uniform grid technology and the convolution complete matching layer, the calculation precision is improved, the implementation process is remarkably simplified, and the calculation efficiency is improved.

The invention discloses a preparation and coupling optimization method of a strip-shaped SOI waveguide adopting end face coupling, and belongs to the field of micro-nano fine structure processing and optical precision measurement. According to the method, through two-step photoetching and two-step etching, on one hand, the substrate section highly coincident with the waveguide end face can be etched on the waveguide end face, and on the other hand, it can be guaranteed that the etching broadening of the Si substrate etching channel cannot cause the hollow-out of the lower portion of the waveguide above SiO2. By using the direct-current magnetron sputtering Cr mask, the waveguide material can be prevented from being etched and damaged in the deep silicon etching process. Through the ion beam etching process, the end face of the waveguide and the etched side wall of the substrate are completely overlapped, so that part of light spots are prevented from being scattered by the Si substrate in the optical fiber coupling process, and the coupling efficiency of the waveguide is further improved. By combining the FDTD simulation result, the low-internal stress SiO2-Si3N4 antireflection film with the proper thickness is deposited on the waveguide end face through ICP-PECVD, light spots are prevented from being reflected on the waveguide end face, and the light spot coupling efficiency reaches the maximum.

The invention provides a preparation method of a molybdenum disulfide material with a biological fine hierarchical structure form, and relates to the technical field of nano materials, and the preparation method comprises the following steps: preparing a biological wing as a biological template; pretreating the biological template by using an ethylenediamine tetraacetic acid solution; molybdenum disulfide grows on a pretreated biological template through a hydrothermal method, and the molybdenum disulfide material of the biomorphic fine hierarchical structure is obtained. Organisms with fine hierarchical structures existing in the nature in quantity serve as the template, and the molybdenum disulfide material of the fine hierarchical structure is prepared through the hydrothermal method; the prepared metal material inherits the fine structure characteristics of an original biological template and has wide application value in the fields of photoelectron, photocatalysis and magnetic performance, compared with the original biological template, the thickness of the molybdenum disulfide layer can be further controlled by adjusting the hydrothermal time and temperature of a hydrothermal method, and the preparation method is simple and easy to implement. The molybdenum disulfide material with the multi-scale graded fine structure and different biological morphological structures is prepared.

The method is based on a core idea of unifying a field theory and an interference field theory, is devoted to exploration and expansion of an artificial field frontier technology, and covers an artificial field plus quality technology, an artificial field interference technology and an artificial field control space-time technology. In the research process, mutual verification of experiments and theories is paid attention to. Theoretically, internal correlation among Planck mass, electron mass, gravitational force, electric field force, magnetic field force and fine structure constants is deeply analyzed, a conclusion that the gravitational force, the electric field force and the magnetic field force are equal when a substance reaches a light velocity is obtained, and a unique quantum effect is presented. In the aspect of experiments, a simple verification method is adopted, and substances are placed in a positive electrode area and a negative electrode area respectively. Along with the enhancement of the electric field intensity and the action time, the substance mass in the positive electrode area is gradually reduced, and the substance mass in the negative electrode area is correspondingly increased. The phenomenon can be explained as that the space where the positive charges are located has divergence characteristics and the space where the negative charges are located has convergence characteristics, so that the masses of the substances in the positive and negative electrode areas are changed alternately.

The invention belongs to the technical field of material science and microscopic analysis, and designs an efficient and low-damage chip and a preparation method of a Ni36 precision alloy as-cast transmission electron microscope sample for the aviation field. The method comprises the following steps: cutting and polishing an as-cast metallographic specimen, corroding and thinning the as-cast metallographic specimen, preparing a wafer specimen, preparing an electrolyte, carrying out electrolytic double-spraying on the wafer specimen, and carrying out ion thinning on the electrolytic double-spraying specimen. The double-spray electrolyte is composed of 1000 mL of absolute ethyl alcohol and 25 mL to 30 mL of hydrochloric acid with the concentration of 36.0% to 38.0%. The Ni36 precision alloy as-cast transmission electron microscope sample used in the fields of chips and aviation is successfully prepared, the operation is simple, the sample preparation speed is high, the efficiency is high, and the internal microcosmic fine structure is low in damage.

Determination of sensitive and accurate feature values from a matrix-assisted laser desorption / ionization (MALDI) spectrum of a sample is provided. A peak shape function of the mass spectrometer is read. A fine structure component is determined for a first range of the mass spectrum by estimating and subtracting a first background from the mass spectrum. A bump structure is determined for the first range by estimating a second background, which is stiffer than the first background, and subtracting it from the first background. A convolution of the fine structure component is computed for the first range of the mass spectrum with the peak shape function. A first plurality of peaks in the first range is determined from the convolution. A feature value indicative of an abundance associated with each of the first plurality of peaks is determined by combining the first plurality of peaks with the bump structure.

The invention relates to the technical field of additive manufacturing, in particular to an additive manufacturing method of a micron-sized runner and application of the additive manufacturing method. The additive manufacturing method for the micron-sized flow channel comprises the following steps that (a) a configuration body is split into a plurality of parallel solid cylinders based on preset distribution of the micron-sized flow channel in a target configuration, an stl model is obtained and sliced, and a slice file is obtained; (b) based on the slice file, metal powder is subjected to additive manufacturing forming through a selective laser melting process, and a target configuration with a micron-sized runner is obtained; in the step (a), the adjacent solid cylinders are tangent or intersected, and a pore defined by every four solid cylinders corresponds to a micron-sized runner. According to the additive manufacturing method, through proper micron-sized runner configuration design, under the condition that SLM equipment and technology are not changed, controllable preparation of the micron-sized runner can be achieved, and the forming precision of an extremely fine structure is remarkably improved.

The implantable device disclosed by the invention is provided with at least one corrodible zinc-containing part, and the zinc content in the at least one zinc-containing part is within the range of [30,000, 3,000, 3,000]. The zinc content range of at least one of the zinc-containing parts is [50, 70] wt.%, the zinc in the zinc-containing parts is an amorphous structure, or the zinc content range of at least one of the zinc-containing parts is [50, 70] wt.%, and the microstructure of the zinc in the zinc-containing parts is selected from at least one of an amorphous structure, a non-equiaxed structure, an ultra-fine structure or an equiaxed structure with the grain size range of 7-14 grades, or the microstructure of the zinc in the zinc-containing parts is selected from at least one of an amorphous structure, a non-equiaxed structure, an ultra-fine structure or an equiaxed structure with the grain size range of 7-14 grades. The zinc content range of at least one zinc-containing part is (70, 100) wt.%, and the microstructure of zinc in the zinc-containing part is selected from at least one of a non-equiaxed crystal structure, an ultra-fine crystal structure or an equiaxed crystal structure with the grain size range of 7-14 grades. After the implantable instrument is implanted into a body, a zinc corrosion product is generated, and the concentration of the zinc corrosion product in the surrounding tissue of the zinc-containing part of the implantable instrument can inhibit smooth muscle cell proliferation and cannot cause normal tissue cell necrosis.

A preparation and coupling optimization method of bar SOI waveguide using end face coupling belongs to the field of micro-nano fine structure processing and optical precision measurement. Through two-step photoetching and two-step etching, on one hand, the base section plane highly coinciding with the waveguide end face can be etched, and on the other hand, the etching widening of the Si base etching channel cannot cause the waveguide below to be hollowed out. By using the DC magnetron sputtering Cr mask, the waveguide material can be prevented from being etched and damaged in the deep silicon etching process. Through the ion beam etching process, the waveguide end face and the base etching sidewall are completely coincided, so that part of the light spot is avoided from being scattered by the Si base in the optical fiber coupling process, and the coupling efficiency of the waveguide is improved. By combining the FDTD simulation results, the ICP-PECVD is used to deposit the low internal stress SiO2+Si3N4 antireflection film with a suitable thickness on the waveguide end face, the light spot is avoided from being reflected on the waveguide end face, and the light spot coupling efficiency is maximized.

The present application relates to the technical field of additive manufacturing, in particular to a kind of micrometer flow channel's additive manufacturing method and its application.Micrometer flow channel's additive manufacturing method, comprising the following steps: (a) based on the distribution of preset micrometer flow channel in target configuration, configuration main body is split into several mutually parallel solid cylinders, obtain stl model and carry out slicing, obtain slice file;(b) based on the slice file, metal powder is formed by selective laser melting process and is additively manufactured, obtain the target configuration with micrometer flow channel;In step (a), adjacent solid cylinders are tangent or intersect, and the pore surrounded by every 4 solid cylinders corresponds to micrometer flow channel.The additive manufacturing method of the present application, by appropriate micrometer flow channel configuration design, without changing SLM equipment and technology, can realize the controllable preparation of micrometer flow channel, significantly improve the forming precision of extremely fine structure.

[Problem] To provide a technique capable of visualizing, with high spatial resolution in neutron imaging, the internal structure of an object to be inspected, without performing chemical treatment that is required when a nuclear emulsion is used. [Solution] A neutron position recording device 10 is provided with a conversion film 1 and a fluorescent nuclear track detector 2 in order to generate an image representing the fine structure of an object T to be inspected. When each neutron that has passed through the object T to be inspected is incident, the conversion film 1 converts each neutron into a charged particle. The fluorescent nuclear track detector 2 has a surface 2a facing the conversion film 1, and records, due to the incidence of the charged particle from the conversion film 1, the track of the charged particle corresponding to the position of the neutron.

A graphene film in the prior art is poor in structural precision, and an intrinsic structure and mechanical properties are difficult to greatly adjust once the graphene film is formed. The invention provides a reconfigurable graphene oxide sphere fusion membrane which is formed by mutually fusing and assembling a plurality of graphene oxide spheres after the volume of the graphene oxide spheres is contracted synergistically. The graphene oxide ball comprises a core body and a shell, and the shell wraps the core body. The ball melting film can be detached into a plurality of graphene oxide balls in a polar solvent. The number of reconstructions of assembly-disassembly reaches up to 20, and arbitrary mutual conversion of the ball fusion membrane topology, including animal shape, house shape, submarine shape, tree shape and the like, is realized. The elongation at break of the ball melting film is adjustable between 1.5% and 4%. By utilizing the reversible shrinkage-expansion property of the graphene oxide balls, the macroscopic membrane with a fine structure, the reversible disassembly of the macroscopic membrane and the green recovery of the ball elements are realized by mutually fusing and assembling a plurality of balls.

The invention relates to a coherent state preparation method of an alkali metal hot atom ensemble, which realizes transverse statistical spinning coherent state of the alkali metal hot atom ensemble in a room temperature environment based on the alkali metal hot atom ensemble, and comprises the following steps of: actively applying a magnetic field to enable a Zeeman sub-energy level of a hyperfine structure of alkali metal atom electron spinning to generate distinguishable splitting; zeeman sub energy level population is measured by means of Faraday type interaction of light and atoms, and high polarizability of electron spinning is realized by utilizing pumping of circularly polarized light and atom spinning, so that a coherent state of alkali metal atoms is prepared, preparation of a quantum state under a room-temperature macroscopic condition is facilitated, and the method is suitable for industrial production. And a low-cost research platform is provided for related research of quantum precision measurement.

The application discloses a hybrid electromagnetic simulation method suitable for a multi-scale fine structure antenna, and comprises the following steps: firstly, a multi-scale fine structure antenna model to be simulated is created, and the range of the size of the model in a calculation space is determined; a convolutional perfectly matched layer suitable for a hybrid implicit-explicit finite difference time domain method is constructed, and the range of the entire calculation space containing the convolutional perfectly matched layer is determined, then a non-uniform grid is set, a fine region and a transition region from fine to coarse are determined; the three are combined, an excitation source of an electric field is added, then a convolutional perfectly matched layer absorption term, a magnetic field value and an electric field value at the next moment are obtained; finally, the excitation source of the fine structure direction is updated, and a time step is updated. The application proposes a method of efficiently combining a hybrid implicit-explicit finite difference time domain method with a non-uniform grid technology and a convolutional perfectly matched layer, which not only improves the calculation precision, but also significantly simplifies the implementation process and improves the calculation efficiency.

The present invention relates to an acoustic vibration simulation prediction method, storage medium, and device based on spatial spectrum units. The method comprises: dividing the object to be predicted into units, dividing large structures into spatial spectrum units, and dividing the remaining fine structures into finite elements, and modeling the object to be predicted based on the unit division results; setting boundary conditions, excitations, response points, and couplings between units according to the actual conditions of the object to be predicted, and adding them to the constructed model; calculating the system matrix in the vibration equation of the current model system; solving the system vibration equation according to actual needs to obtain a solution result, wherein the solution result includes natural frequency and system response, etc.; and visualizing the constructed model based on the solution result. Compared with the existing technology, the present invention has the advantages of arbitrary unit shape, high computational efficiency, and the ability to directly consider the influence of sound radiation on structural vibration in the system equation without the need for post-processing or iteration.

Provided are a master, a transfer object, and a method for manufacturing a master, particularly a master on which a more complex fine structure is formed, a transfer object using the master, and a method for manufacturing the master. A master in which a plurality of concave-convex assemblies composed of a plurality of concave portions or convex portions are disposed separately from each other on a substrate, the average width of the area occupied by the concave portions or convex portions on the surface of the substrate is below the wavelength of the visible light band, and each of the concave portions or convex portions within the concave-convex assembly is in any one of at least two or more groups in which the center value of the formation length from the surface of the substrate is different.

The invention discloses a method for improving the bending resistance of a flexible substrate nanoimprint photoresist, and belongs to the technical field of photoresponse azobenzene polymer materials and nanoimprint. According to the method, the azobenzene polymer with a specific molecular weight range is selected as an imprinting material, and the characteristic that the bending resistance of the obtained microstructure can be effectively improved by utilizing relatively high molecular weight is utilized, so that a fine structure with high mechanical reliability is directly prepared on the flexible substrate. According to the method, a feasible solution is provided for manufacturing devices with extremely high requirements for structural integrity, the core problem that the performance of the devices is degraded due to the fact that patterns are prone to being damaged in the dynamic bending process can be effectively solved, and the method is particularly suitable for manufacturing flexible photoelectric devices with strict requirements for the structural integrity, such as flexible optical waveguides and flexible optical fibers. And the durability of the pattern in a dynamic bending environment can be obviously improved.

To provide a determination program, a determination system, a determination program recording medium, a determination device, a microstructure manufacturing system, a method for determination, and a method for manufacturing a microstructure for determining the shape of a microstructure having birefringence properties.SOLUTION: A determination program (2) for determining the shape of a microstructure (9) having birefringence properties causes a computer to function as input means (11) for inputting phase difference information concerning a phase difference between a fast axis and a slow axis of zero-order light obtained by transmitting or reflecting circularly polarized light, elliptically polarized light, or linearly polarized light through the microstructure (9), and as structure determination means (12) for determining the shape of the microstructure (9) on the basis of the phase difference information input by the input means (11).SELECTED DRAWING: Figure 9

To provide a heterodyne scanning tunneling microscope system measurement method, a measuring device, and an observation system capable of measuring the change of state over time of a microstructure that is the measurement object.SOLUTION: The measurement method includes: an arrangement step of arranging a measurement object and an action member that interacts with the measurement object so that the measurement object and the action member form a nonlinear connection part; a first signal input step of inputting, to the nonlinear connection part, a first electromagnetic signal which is a frequency comb composed of a plurality of spectral lines with frequencies aligned at equal intervals; a second signal input step of inputting a second electromagnetic signal to the nonlinear connection part; and a detection step of detecting a heterodyne beat signal generated by interaction between the first and second electromagnetic signals in the nonlinear connection part.SELECTED DRAWING: Figure 1

The application relates to a high-entropy alloy local lattice distortion quantitative calculation method, a system and a medium, the high-entropy alloy local lattice distortion quantitative calculation method comprises the following steps: S1; collecting an X-ray diffraction spectrum of a high-entropy alloy; S2: analyzing and determining the crystal structure of the high-entropy alloy according to the X-ray diffraction spectrum; S3: obtaining a lattice constant by full spectrum fitting of the X-ray diffraction spectrum and according to the crystal structure; S4: obtaining an average atomic pair distance according to the geometric relationship between the lattice constant and the crystal structure; S5: collecting a fine structure spectrum of X-ray absorption of different alloy element K-edges or L-edges in the high-entropy alloy; S6: analyzing and determining the average atomic pair distance of a specific element and its nearest neighbor element; and S7: obtaining the local lattice distortion variable and the average lattice distortion variable of the specific element atom of the high-entropy alloy. The application realizes quantitative calculation of the local lattice distortion of the high-entropy alloy with element recognition capability.