35results about How to "Low absorption rate" patented technology

The invention belongs to the technical field of hydraulic engineering, and provides a sediment particle size distribution measuring system and method.The method comprises the steps that images of sediment particles in a water body are collected, and a first sediment particle image is obtained; processing the first sediment particle image to obtain a sediment grayscale image; a K-means clustering algorithm is adopted to carry out clustering analysis on the sediment gray level image, and an image with a first-level clustering result is obtained; carrying out clustering analysis on sediment particles with particle sizes smaller than a preset threshold value in the image with the first-level clustering result by adopting a DBSCN clustering algorithm to obtain an image with a second-level clustering result; and carrying out edge detection on the sediment particles in the image with the secondary clustering result, and then sequentially carrying out binarization processing, equivalent circle diameter transformation and statistics on the particle size distribution of the sediment particles to obtain a particle size distribution result. The problem that an existing sediment particle size measurement system is low in measurement precision in a complex underwater environment with dense sediment and more fine particles is solved.

The invention discloses a multi-spectral-band compatible stealth coating based on a high-entropy alloy and a preparation method of the multi-spectral-band compatible stealth coating, and belongs to the technical field of functional high-entropy alloy coatings and preparation of the functional high-entropy alloy coatings. The problem that the visible light and infrared stealth effect of an existing stealth coating in a wide spectrum range is poor is solved. According to the preparation method, the high-entropy alloy film is prepared through the magnetron sputtering technology, efficient customization of material components and structures is achieved through scientific screening and optimal combination of elements and regulation and control of magnetron sputtering parameters, and therefore the high-entropy alloy film which is uniform, compact and excellent in performance is obtained. Test results show that the visible light band absorptivity of the high-entropy alloy coating is about 0.95, the infrared band emissivity of the high-entropy alloy coating is about 0.05, and multi-spectrum-band compatible stealth in the visible light and infrared spectrum range is achieved.

The invention belongs to the technical field of solar cells, and particularly relates to a composite layer for a laminated solar cell and application of the composite layer. The invention aims to provide a novel intermediate composite layer material based on metal nitrogen oxide, the novel intermediate composite layer material specifically comprises titanium oxynitride, tantalum oxynitride and molybdenum oxynitride, and the composite layer material has the advantages of proper energy level matching, good light transmission, small parasitic absorption, excellent carrier recombination performance, low preparation cost and good stability. The material is prepared by adopting magnetron sputtering and atomic layer deposition methods, the preparation process is simple, the deposition damage is small, the photoelectric property of the material can be regulated and controlled by adjusting deposition parameters, and then excellent carrier recombination performance is achieved. Compared with a common doped indium oxide composite layer and a doped silicon film tunnel junction, the metal nitrogen oxide intermediate composite layer has the advantages of simple preparation process, low cost, small optical parasitic absorption and the like; and the lateral conductivity is relatively low, so that the method is suitable for preparing a large-area perovskite / crystalline silicon laminated cell.

The invention belongs to the technical field of inorganic powder, and discloses polymer-coated modified heavy calcium carbonate composite particles as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing and stirring heavy calcium carbonate and a mixed solution of NaOH and Na2CO3, and carrying out suction filtration, washing and drying; adding KH-570 hydrolysate into the obtained surface hydroxylated ground calcium carbonate, continuously stirring in an oil bath pan, carrying out reflux condensation reaction for 3 hours, carrying out suction filtration, and drying to obtain KH570-OH-GCC; sequentially adding lauryl sodium sulfate, deionized water and KH570-OH-GCC, and adding an initiator for reaction; dropwise adding a mixed solution of butyl acrylate and ethylene glycol dimethacrylate, and reacting for 2 hours after dropwise adding; and adding an emulsifier, continuously stirring, dropwise adding a mixed solution of methyl methacrylate and allyl methacrylate, reacting for 2.5 hours after dropwise adding, cooling, carrying out suction filtration, and drying to obtain the polymer-coated modified heavy calcium carbonate composite particles.

The invention discloses a high-efficiency short-process production method and production system for carbonization-process white carbon black, an absorption reaction is completed in a normal-pressure gas-liquid small-sized carbonization reaction kettle, and rapid continuous reaction of CO2 gas and liquid sodium silicate in the carbonization reaction kettle is realized through high-strength stirring and gas-liquid interface contact enhanced absorption; and high-efficiency absorption of carbon dioxide is realized under normal-pressure reaction conditions. The carbonization reaction is carried out in a small-sized carbonization reaction kettle, the precipitation reaction can be carried out in a large-sized precipitation reaction kettle according to the scale, the solid-liquid reaction is carried out in the precipitation reaction kettle, and the silicon dioxide micro particles generated by the absorption reaction are subjected to uniform mixing by controlling the reaction time, the reaction temperature and the reaction pH value. The particles are further aggregated and grown to form the silicon dioxide particles with stable structure and reliable performance, the structure is stable, the performance is reliable, and the utilization efficiency of raw materials is improved.

The invention belongs to the field of edible oil preparation, and particularly relates to camellia diester edible oil assisting in reducing blood fat and a preparation method of the camellia diester edible oil. Walnuts, peas and sweet corn kernels are ground into thick liquid and then are subjected to sufficient enzymolysis, the obtained nutritional rapeseed oil is dispersed in mixed edible oil, and the prepared nutritional camellia diester oil mixture is rich in nutrition; the plant extract obtained by ultrasonic extraction is effectively adsorbed by the mixed jelly, and the obtained nano particle and nutrient camellia diester oil mixture assisting in reducing blood fat and promoting metabolism has an effective blood fat reducing effect; the antioxidant stability maintaining composition and the nanoparticles assisting in reducing blood fat and promoting metabolism are uniformly dispersed in the nutritional camellia diester oil mixture, and the prepared camellia diester edible oil assisting in reducing blood fat is rich in nutrition, does not increase the blood fat of a body after being eaten for a long time, does not damage the liver and kidney, and is not easy to deteriorate.

The invention relates to a drop-out fuse with a sun exposure resistant coating. And a coating with low absorptivity is uniformly sprayed on the surface of the drop-out fuse. The coating of the coating comprises the following components in percentage by weight: 35% of polymer silicon resin powder, 19% of titanium dioxide, 24% of barium sulfate powder, 20% of xylene, 0.6% of flatting agent, 0.4% of defoaming agent and 1% of UV absorbent. The coating is uniformly sprayed on parts which do not influence the action and electric conduction of the fuse tube, and the sprayed area comprises an upper iron handle, an insulator, a fixed end, a lower iron handle, the fuse tube and a pull ring of the drop-out fuse. The surface of the coating has high brightness and can reflect most sunlight. The coating has good insulation characteristics and can be used in the electrical field. The coating has good weather resistance and chemical stability, and is suitable for being used in various harsh environments.

The invention discloses a dietary fiber composite solid food and a preparation method thereof, and belongs to the technical field of food, the dietary fiber composite solid food comprises the following raw materials by weight: 1-6 parts of water soluble fiber, 4-15 parts of insoluble water fiber, 1-9 parts of a white kidney bean extract, and 2.8-15 parts of a flavoring agent. The dietary fiber composite solid food disclosed by the invention can relax bowel, improve the internal environment of the intestinal tract and assist the health of the intestinal tract environment, and the insoluble water fibers enter the intestinal tract to coat redundant stool or faeces in the intestinal tract, increase the peristalsis speed of the intestinal tract and enable the stool or faeces to be discharged out of the body, so that the digestive function of the intestinal tract is improved, and the dietary fiber composite solid food can effectively assist in keeping the health of the human body.

The invention discloses a large-aperture ultra-low absorption type Kinform lens and a design method of the large-aperture ultra-low absorption type Kinform lens. The large-aperture ultra-low absorption type Kinform lens is characterized in that the large-aperture ultra-low absorption type Kinform lens comprises a plurality of final teeth which are arranged side by side along an x axis and have the tooth length of h, and the final teeth are symmetrically distributed along a y axis; wherein the x-axis direction is the aperture direction, and the y-axis direction is the X-ray incidence direction; # imgabs0 # m > = 1 and is an integer, lambda is the wavelength of the X-ray, delta is the refraction coefficient of the X-ray in the material, and the designed tooth length h in the y direction is the length of the material causing the 2 [pi] m phase difference. According to the invention, the fineness limit of the processing technology can be fully utilized, and the total length of each tooth inside is greatly reduced, so that the absorption of X-rays is reduced; on the basis, according to the communication type scheme designed by the invention, the reinforcing cross beam can be introduced under the condition that the phase matching of the lens is not damaged, so that the stability of the lens structure is improved, and the processing technology difficulty is reduced.

The invention discloses a vertically stacked full-color Micro-LED display device based on a photonic crystal structure, the vertically stacked full-color Micro-LED display device comprises a substrate layer, a red light Micro-LED layer, a two-dimensional photonic crystal connecting layer, a green light Micro-LED, a two-dimensional photonic crystal connecting layer, a blue light Micro-LED, a GaP connecting layer and an ITO / air interface layer from bottom to top in sequence, the two-dimensional photonic crystal is composed of indium bumps and air holes, the period of the two-dimensional photonic crystal is 100nm-2000nm, and the interval of the indium bumps and the air holes is 100nm-2000nm. The duty ratio is 20%-80%, and the height is 20 nm-500 nm. A two-dimensional photonic crystal structure is used and optimized, and red light and green light are reflected by adjusting the forbidden bandwidth of the photonic crystal, so that the light extraction efficiency of the bottom red light-emitting unit and the middle green light-emitting unit is improved, and the absorption loss of the red light and the green light is reduced; the problems that due to the fact that different-color connecting layers of an existing vertical stacking type Micro-LED display device absorb light seriously, the overall light emitting efficiency of the device is low, the chromaticity is not good, and use is affected are solved.

Provided is a near-infrared curable ink composition including: a thermosetting resin or a thermoplastic resin; and near-infrared absorbing particles. The near-infrared absorbing particles contain a cesium tungsten oxide having an orthorhombic or hexagonal crystal structure and represented by a general formula: CsxW1-yO3-z (where 0.2 ≤ x ≤ 0.4, 0 < y ≤ 0.4, 0 < z ≤ 0.46).

This application discloses an LED chip, relating to the field of light-emitting diode technology. In this LED chip, the epitaxial stack on the substrate includes a stacked first type semiconductor layer, an active layer, and a second type semiconductor layer. The epitaxial stack has a first groove and a second groove. The first groove penetrates the second type semiconductor layer and the active layer, and exposes a portion of the first type semiconductor layer to provide a first electrode. The second groove penetrates at least a portion of the second type semiconductor layer and is covered by a current blocking layer. A second electrode is provided on the side of the current blocking layer away from the substrate. The second electrode mainly injects current through a current spreading layer. In this way, at least a portion of the epitaxial stack below the second electrode is etched into the second groove, and the current blocking layer below the second electrode covers and passivates the second groove. This reduces the light emission of the active layer below the second electrode and also reduces the light absorption of the epitaxial stack below the second electrode, thereby improving the luminous efficiency and brightness of the LED chip.

The present invention relates to the field of laser paint removal, and discloses a method for improving the quality of paint removal on the surface of a metal plate with the assistance of an electrostatic field, comprising the following steps: Step 1, placing a metal plate on an electrostatic platform, an insulating pad is provided between the metal plate and the electrostatic platform, and the area to be processed is aligned with the laser incident area; Step 2, making an electrostatic gun contact the electrostatic platform, turning on an electrostatic generator, selecting a suitable voltage, setting the discharge mode to contact discharge, so that the surface of the electrostatic platform is full of charge and the electron density on the plate surface is increased; Step 3, turning on the laser, adjusting the laser parameters, and removing the paint layer on the surface of the sample. The present invention increases the electron density on the surface of the metal layer through the action of an electrostatic field, thereby reducing the metal's absorption rate of the laser, reducing the influence of heat input on the metal matrix during processing, and improving the quality of paint removal on the surface of the metal plate, which is of great significance to laser removal technology.

The invention provides a preparation method of a corrosion-inhibition energy-saving efficient desulfurizer, and belongs to the technical field of desulfurizers, the preparation method comprises the following steps: S1, mixing tert-butylamine, 2-chloroethoxyethanol and methanol, reacting, cooling, adding a NaOH solution, carrying out reflux reaction, carrying out suction filtration, retaining filtrate, and carrying out cold reduced pressure distillation on the filtrate to obtain tert-butylamino ethoxyethanol; s2, uniformly mixing L-arginine, tetramethylammonium hydroxide and deionized water, and carrying out vortex stirring to obtain an L-arginine / tetramethylammonium ionic liquid; s3, mixing and stirring the radix salviae miltiorrhizae extract, tert-butylaminoethoxyethanol, L-arginine / tetramethylammonium ionic liquid, N-methyldiethanolamine and deionized water, so as to prepare the corrosion-inhibition energy-saving efficient desulfurizing agent. According to the invention, high H2S selectivity and energy conservation can be realized, and a certain corrosion inhibition effect is achieved.

An aromatic heterocyclic compound, and a pharmaceutical composition and an application thereof. Specifically disclosed are a compound as represented by formula I-A, a stereoisomer thereof, a diastereoisomer thereof, or a pharmaceutically acceptable salt of any one of the described substances, or a crystalline form or a solvate of any one of the described substances. The aromatic heterocyclic compound is novel in structure, and has good CDK7 inhibitory activity and good selectivity.

This utility model belongs to the field of medical device technology and discloses an implantable electrode lead. The implantable electrode lead includes a stimulation segment, a middle segment, and a connecting segment connected sequentially. The stimulation segment includes several stimulation contacts, the connecting segment includes several connecting contacts, and the middle segment includes an outer sheath and several guidewires housed within the sheath. The guidewires electrically connect the stimulation contacts and connecting contacts one-to-one. The stimulation segment and at least a portion of the middle segment are implanted intracranially to form an intracranial segment. The middle segment near and fixed to the skull forms a cranial segment, and the portion of the middle segment extending outside the skull and the connecting segment form an extracranial segment. The guidewires in the intracranial segment are straight, those in the cranial segment are spiral, and at least a portion of the guidewires in the extracranial segment are spiral, with the pitch of the spiral in the cranial segment being smaller than that in the extracranial segment. This utility model reduces manufacturing costs and heat generation; furthermore, it facilitates intraoperative operation and ensures a comfortable postoperative experience for the user.

The present invention discloses a semiconductor light-emitting element, comprising a semiconductor epitaxial stack, having a first surface and a second surface opposite thereto, comprising a first conductive semiconductor layer, a second conductive semiconductor layer and an active layer located therebetween; a through hole, at least penetrating the first conductive semiconductor layer, the second conductive semiconductor layer and the active layer; an electrical connection structure, arranged in the through hole, extending to the first surface of the first conductive semiconductor layer, and forming an electrical connection with the first conductive semiconductor layer; a first electrode metal layer, arranged on the second surface of the semiconductor epitaxial stack, and connected to the electrical connection structure; characterized in that: at least one section of the through hole exposes the first conductive semiconductor layer, and the angle between the side wall of the first section of the through hole and the first surface is θ1, 0°<θ1≤90°. The present invention can improve the uniformity of current expansion, and enhance the uniformity of luminous brightness and luminous efficiency of the semiconductor light-emitting element.

The invention provides a near-infrared high-reflection structural color optical filter and a preparation method thereof, and relates to the technical field of optics, the near-infrared high-reflection structural color optical filter comprises a substrate, and a reflection layer, a first dielectric layer, a first absorption layer, a second dielectric layer, a second absorption layer and an anti-reflection layer which are sequentially formed on the substrate; the reflecting layer, the first dielectric layer and the first absorption layer form a first optical resonant cavity, and the first absorption layer, the second dielectric layer and the second absorption layer form a second optical resonant cavity; the absorptivity of the first absorption layer and the second absorption layer to visible light in a target color wavelength range is smaller than the absorptivity of the first absorption layer and the second absorption layer to visible light in a non-target color wavelength range, and the absorptivity of the first absorption layer and the second absorption layer to near-infrared light is smaller than a preset absorptivity threshold value. In this way, the two continuous asymmetric optical resonant cavities and the top anti-reflection layer are adopted, high-purity and high-brightness colors are achieved in the visible light range, the cooling function is achieved through the high reflectivity of the near-infrared band, cost is low, and the technology is simple.

The present invention provides a multi-space optical camera based on a large-size, lightweight sunshade, which is used to solve the technical problems of the existing space cameras based on an integrated cylindrical sunshade, such as the long cylinder length that even exceeds the envelope of the satellite, or the need to set a surface coating with an ultra-high absorption ratio, or the technical problems of the space camera based on James Weber's telescopic light shield having certain limitations in use in a more complex orbital environment. The multi-space optical camera based on a large-size, lightweight sunshade of the present invention adopts the form of a solar sunshade plus a ground-air sunshade, which effectively reduces the absorption rate of the camera surface; at the same time, compared with the traditional cylindrical sunshade, the solar sunshade of the present invention has only one surface, which not only greatly reduces the weight and volume, but also through the specific structure of the driving mechanism and the transmission mechanism in the transmission shaft system, the small-size driving mechanism drives the large-size solar sunshade to rotate 360 ​​degrees, thereby realizing multi-angle stray light suppression.

The utility model relates to a glass assembly and a vehicle, which are beneficial to improving the utilization efficiency of light rays and further beneficial to improving the lighting and atmosphere lamp effects of the glass assembly. The glass assembly comprises a light source used for emitting visible light; the first glass layer is configured to allow the visible light to generate optical waveguide in the first glass layer; the second glass layer is positioned on one side of the first glass layer; the first bonding layer is located between the first glass layer and the second glass layer, the first bonding layer is bonded to the surface of the side, close to the second glass layer, of the first glass layer, and the visible light transmittance of the first bonding layer is larger than or equal to 40%.

A method for preparing white stable lignin and its application are disclosed. This invention addresses the limitations of existing lignin decolorization processes, which are constrained by long decolorization times and difficulty in maintaining color stability under ultraviolet light stimulation after decolorization, thus failing to meet the low absorption requirements of radiative cooling materials in the visible light band. The method includes: 1. Preparation of DES; 2. Preparation of lignin solution; 3. Modification of lignin; 4. Bleaching; 5. Preparation of white stable lignin. Application: It is used in the preparation of refrigeration materials.

Various embodiments of the disclosure relate to a wearable electronic device including an antenna, including a bridge, a first rim disposed in a first direction of the bridge and a second rim disposed in a second direction of the bridge which is a direction opposite to the first direction, first glass disposed to have at least a part thereof surrounded by the first rim and second glass disposed to have at least a part thereof surrounded by the second rim, a first temple operatively connected to at least a part of the first rim by using a first hinge part and a second temple operatively connected to at least a part of the second rim by using a second hinge part, a first printed circuit substrate disposed within the first temple and including a wireless communication module, an FPCB electrically connected to the first printed circuit substrate, disposed in at least a part of the first rim, the bridge, and the second rim, and including a feed part and a ground, a conductive pattern disposed in at least a part of the first rim, the bridge, and the second rim, and a conductive stub electrically connected to a part of the conductive pattern. The conductive pattern may have a first part electrically connected to the feed part and extended through the first rim, the bridge, the second rim, and the first rim and have a second part electrically connected to the ground. The conductive stub may be constructed to have a first part electrically connected to the feed part. Various other embodiments may be possible.

The invention discloses a substrate structure and a substrate surface treatment method and device.The method comprises the steps that a transparent inorganic substrate is provided, and the roughness Ra of the to-be-treated surface of the substrate ranges from 0.1 micrometer to 20 micrometers; an energy absorption layer is at least formed on the to-be-treated surface of the substrate, the energy absorption layer completely covers the micro protrusions and the micro pits on the to-be-treated surface of the substrate, and the energy absorption coefficient of the energy absorption layer is larger than that of the substrate; ultra-short pulse laser is adopted to irradiate the substrate, so that phase explosion happens to the energy absorption layer, multi-photon absorption happens to the micro-protrusion area, and under the action of phase explosion and multi-photon absorption, the laser conducts cold cutting on the micro-protrusions; wherein the wavelength lambda of the ultrashort pulse laser ranges from n * Ra / 10 to n * Ra, and n is the refractive index of the substrate. According to the method, under the combined action of phase explosion and multi-photon absorption, the micro-protrusions are subjected to cold cutting through laser, so that the micro-protrusions on the surface to be treated are stripped, and the substrate structure is not damaged.

The utility model belongs to the technical field of optical fiber light guide bars, and particularly relates to an optical fiber assembly for dental diagnosis and treatment, which comprises a light guide component and a connector fixed on the light guide component and used for connecting the light guide component with a dental curing machine, a convex block for extruding and expanding the rubber ring outwards is arranged in the plug head in a sliding manner, and the expansion action is realized by the thrust of the tail end in the inserting process of the plug head and the curing machine; it can be understood that the inner cladding of the optical fiber uses polytetrafluoroethylene to realize low-refractive-index total reflection, reduce light leakage and have high chemical stability; the middle layer reduces interface scattering and refractive index through silicon resin so as to inhibit light loss; an outer cladding layer is aluminized to reflect lateral light leakage and resist high temperature; and meanwhile, a linkage mechanism of the convex block and the rubber ring is arranged, and the plugging action of the connector and the expansion of the rubber ring are synchronously controlled through a linkage ring, so that the plugging convenience and the connection stability are realized.

The invention relates to green super-hydrophobic concrete with impermeability and self-healing property, novel environment-friendly super-hydrophobic concrete (SC-4) is prepared by adopting a specific body hydrophobic modification method, the water contact angle of the novel environment-friendly super-hydrophobic concrete is 155 degrees, and the sliding angle of the novel environment-friendly super-hydrophobic concrete is 8 degrees. The compressive strength (CS) of the SC-4 is 29.83 MPa, and the flexural strength (FS) of the SC-4 is 5.47 MPa. Due to the synergistic effect of wettability and mechanical properties, the SC-4 obtains excellent overall stability. A leaching test shows that the SC-4 has excellent impermeability, the accumulated water absorption rate of the SC-4 is 75% lower than that of common concrete (OC), and the accumulated NaCl absorption rate of the SC-4 is 80% lower than that of the common concrete (OC). After 200 times of high-strength load wear, the water contact angle of the sample is still kept at 150 degrees or above, and the corresponding mechanical property is also kept stable. Therefore, the SC-4 has excellent mechanical stability and self-healing property. An ultraviolet test shows that CS and FS of the aged SC-4 are only reduced by 7.9% and 4.4%, which indicates that the sample has very strong ultraviolet (340nm) resistance. The important contribution of the research lies in developing green super-hydrophobic concrete which is superior to traditional concrete in the aspects of durability and environmental aging resistance, meanwhile, an environment-friendly preparation method is adopted, and a solution with a wide prospect is provided for practical engineering application.

The utility model discloses a double-fan dust absorption purifier for ox horn products. A double-fan dust absorption purifier for ox horn products comprises an adjusting device, an adjuster is arranged in the adjusting device, an adjusting structure is installed in the adjuster, a shell is arranged in the adjusting structure, a left motor and a right motor are fixedly embedded in the shell, a control shaft is clamped on the left motor and the right motor, and a telescopic shaft body is clamped on the control shaft. The outer side of the up-down motor is matched with the outer side of the left-right motor. The up-down motor and the left-right motor in the adjusting device drive the control shaft to move up and down and left and right, so that the angle of the dust collecting pipe can be adjusted according to actual conditions, and the problem that a user cannot adjust a dust absorbing opening according to specific grinding conditions is effectively solved; different rotating speeds and different grinding directions of the grinding machine cause different directions of dust, so that the absorption rate of the fan dust absorption purifier to the dust is greatly reduced.

The invention discloses a rice root and leaf bidirectional regulation barrier coupling method, which belongs to the technical field of rice planting, and comprises the following steps: S1, selecting a rice planting field; s2, applying and scattering modified ferroferric oxide; s3, deeply ploughing the soil of the rice planting land; s4, the modified ferroferric oxide adsorbing the heavy metal cadmium ions is removed through magnetic attraction; s5, selecting a high-quality rice variety; s6, the high-quality rice variety and valerian seeds are subjected to seed soaking, germination accelerating, sowing and seedling raising; s7, applying compost, shallowly turning the soil of the rice planting land, and exposing to the sun; s8, before transplanting, leveling and spraying water for cooling; s9, during transplanting, transplanting; s10, after transplanting, injecting water; s11, in the growing period, fertilizer and water are supplemented regularly; s12, harvesting in a harvesting period; according to the invention, bidirectional regulation and separation coupling of rice roots and leaves can be realized, and the planting quality and yield of rice are improved.

The present invention discloses an ultra-thin flexible conformal metamaterial absorber and a preparation method thereof, which is composed of a periodic array of several unit structures; the unit structure is composed of an electromagnetic resonance layer, a dielectric layer, and a metal grounding layer, the electromagnetic resonance layer is located on the dielectric layer, the dielectric layer is located on the metal grounding layer, and the geometric centers of the electromagnetic resonance layer, the dielectric layer, and the metal grounding layer coincide in the vertical direction; the resonator is composed of a combination of a ring and a cross structure, the cross structure is arranged on the inner side of the ring, and the geometric center of the cross structure coincides with the center of the ring, and the layers are hot-pressed using an optically transparent adhesive. The resonator body is a thin copper plate, and a hollowing process is performed on the thin copper plate to obtain a hollow ring and a hollow cross structure, and the geometric centers of the hollow ring and the hollow cross structure coincide with the geometric center of the thin copper plate. The present invention has very good absorption performance for microwaves from the S band to the X band at four specific frequencies.

The invention relates to a microbiological detection bottle for sterility test and a preparation method thereof, and belongs to the technical field of sterility test. The microbiological detection bottle comprises a bottle body, the inner surface of the bottle bottom of the bottle body is covered with a color developing layer, and the color developing layer is covered with a light reflecting layer; and the developing layer comprises a transparent silica gel layer containing a developing indicator. The detection sensitivity can be effectively improved, false negative results are reduced, and the detection time is shortened.