11results about How to "Precise structure" patented technology

The application belongs to the technical field of computer vision, and discloses a window frame structure extraction method and system based on image segmentation and multi-image fusion, which comprises the following steps: obtaining an orthographic window image of a building facade, and performing first preprocessing on the orthographic window image; wherein the first preprocessing comprises window clustering grouping and super-resolution processing; performing window frame segmentation on the first preprocessed orthographic window image based on an image segmentation algorithm to obtain a segmented window frame mask; fusing the window frame masks of the same cluster based on a multi-image fusion algorithm to generate a window frame fusion mask; extracting the geometric parameters and color parameters of the window frame fusion mask; and obtaining a target window frame structure according to the extracted geometric parameters and color parameters; through the steps of the image segmentation algorithm, the multi-image fusion algorithm, the geometric parameter and color parameter extraction, etc., the window frame structure corresponding to the orthographic window image can be accurately extracted.

The embodiment of the application relates to an algorithm and a device of a Bayesian classifier of a non-uniform background, which are applied to an underwater active sonar system, the algorithm comprising: obtaining underwater data to be measured and auxiliary data through the active sonar system; the number K of the auxiliary data is greater than 0; modeling classification of the unknown covariance matrix structure into a binary hypothesis testing problem; hypotheses of the binary hypothesis testing problem comprise H i Wherein i=0, 1, H0 is a case that the unknown covariance matrix is a complex conjugate symmetric matrix; H1 is a case that the unknown covariance matrix is a real symmetric matrix; a Bayesian model is set, the Bayesian model comprising a complex inverse Wishart random matrix and a real inverse Wishart random matrix; a classifier for distinguishing the two hypotheses is obtained by using a minimum error probability criterion.

The application belongs to the cross field of nanomaterials and coordination chemistry, and specifically discloses a near-infrared responsive photothermal silver-palladium nanocluster material, a preparation method and application in near-infrared photothermal conversion. 362 H 270 Ag 20 Cl4F 12 P8Pd5Sb2, which is abbreviated as Ag 20 Pd5(4‑EBP) 18 (DPPP)4(SbF6)2·2CH2Cl2, belongs to a monoclinic system, and a space group is P21 / n, a =16.228(13)Å, b =40.670(3)Å, c =25.941(2)Å, α=90°, β =100.283(2)°, gamma =90°, V=16846(2)Å 3 , and a molecular weight is 8170.22 Da. The preparation method has short process flow, simple operation, and raw materials are easy to obtain. The photothermal silver-palladium nanocluster has a high photothermal efficiency of 73.25% under 915 nm (0.6 W / cm 2 ) laser excitation, and has good application prospect.

This invention discloses a non-inertial navigation mobile indoor volume measurement and 3D reconstruction method, equipment, and computer-readable medium, belonging to the interdisciplinary field of precision engineering measurement, computer vision, and digital twin technology. The method includes the following steps: S1, dynamic scanning data acquisition; S2, adaptive data augmentation and cleaning; S3, trajectory and depth calculation based on motion continuity constraints; S4, cross-sectional topology construction and closure constraints; S5, 3D solid modeling preserving volume characteristics; and S6, precise volume calculation based on the solid model. This invention employs the aforementioned non-inertial navigation mobile indoor volume measurement and 3D reconstruction method, equipment, and computer-readable medium, and through a single-line 2D LiDAR combined with innovative algorithms, achieves mobile high-precision volume measurement and high-fidelity 3D reconstruction of irregular indoor spaces under low-cost hardware conditions.

This invention discloses a multicolor fluorine magnetic resonance imaging probe based on a metal-organic cage. First, a rhodium-based metal-organic cage is formed by the self-assembly of a fluorinated isophthalic acid ligand and a rhodium salt, covalently introducing the first characteristic fluorine signal. Then, leveraging the coordination ability of the rhodium nodes in the rhodium-based metal-organic cage, it coordinates with a fluorinated pyridine derivative, introducing a second characteristic fluorine signal. This results in a multicolor probe containing both fluorine signals within the metal-organic cage, ensuring that all signals exhibit completely consistent pharmacokinetic behavior in vivo. This achieves true multi-channel synchronous imaging, solving the fundamental problem of spatiotemporal asynchrony of mixed probe signals. The probe system of this invention features precise structure, strong design flexibility, high imaging sensitivity, and multicolor imaging capabilities, providing a new solution for existing fluorine probes with single-channel imaging or complex structures. It also provides a new tool for in vivo multi-target biological imaging and dynamic monitoring.

This invention relates to the field of pharmaceutical and chemical intermediates technology, and discloses a novel class of substituted phenylethyl-O-β-D-glucuronide compounds. These compounds are generated using substituted phenylethanol as a substrate and 1-fluoro-D-glucuronic acid as a glycosyl donor, catalyzed by β-glucuronyltransferase derived from *E. coli*. The process yield can reach over 95%, and the reaction conditions are mild and environmentally friendly. Substituted phenylethyl-O-β-D-glucuronide can be efficiently used for the determination of β-glucuronidase activity, and its applications are wide-ranging and reliable. The product can meet the needs of pharmaceutical, food, and other fields for β-glucuronidase activity control. It can be used for enzyme activity detection in the auxiliary diagnosis of clinical diseases, and also for enzyme quality control in fruit juice clarification processes in the food industry, drug precursor activation, and glycan structure analysis in the biopharmaceutical field. The product structure has been verified to be accurate by mass spectrometry and 1H NMR spectroscopy, and enzymatic hydrolysis experiments have confirmed its reliable application.

The utility model discloses a kind of COB light source and its system along black rail line adjustment color coordinate, it is related to LED lighting technical field.The utility model along black rail line adjustment color coordinate COB light source includes substrate and light emitting module group, and substrate is equipped with middle light emitting area and the auxiliary light emitting area for emitting white light, auxiliary light emitting area is closed annular structure and is surrounded in the middle light emitting area outer;Light emitting module group is equipped in middle light emitting area, and light emitting module group includes several first color temperature module, several second color temperature module and several third color temperature module;First color temperature module, second color temperature module and third color temperature module are spaced apart and are alternately distributed in middle light emitting area;White light color temperature emitted by auxiliary light emitting area is 4000K-6000K, and the color temperature of light emitting module is 1800K-8500K.The utility model adds white light channel to obtain fine color coordinate adjustment capability, can realize accurate positioning of color coordinate on black rail line, color temperature adjustment precision is high, and spectral coverage is large.

This invention discloses a piezoelectric MEMS device, its fabrication method, and its applications, belonging to the field of microelectromechanical systems (MEMS) technology. The fabrication method includes: preparing an SOI wafer; performing PSG spin-coating annealing and / or metallization modification on the device layer surface to form a conductive seed layer; depositing a piezoelectric layer; simultaneously etching the insulating layer, modified device layer, and piezoelectric layer using a specific mixed gas or pulse modulation process; forming a metal electrode layer and a bonding metal layer; and bonding and integrating with a TSV structure. This invention replaces traditional metal electrodes with metallization modification, avoiding electrode fatigue and aging, and improving device reliability; the use of single-mask synchronous etching and vapor phase release technology eliminates overlay and bonding errors, reducing process complexity and cost, making it suitable for high-performance sensors, ultrasonic detection, audio, and smart hardware.

The application discloses a synthesis method of xylulose-5-phosphate. The method takes a commercially available compound 1 as a starting material, and obtains the target product xylulose-5-phosphate through seven independent step-by-step reactions. The intermediates are compound 2 to compound 7 in turn. The synthesis method provided by the application is a step-by-step reaction, each reaction is an independent unit, the process parameters are accurately controllable and suitable for industrial operation errors, the side reactions are few, and the product selectivity is high. The method innovatively uses tetrabenzyl pyrophosphate as a phosphorylation reagent, replaces expensive reagents, and reduces the synthesis cost. The reaction condition of the method is mild, the operation is convenient, the crude compound 2 and the crude compound 4 can be directly used in the next step reaction, the post-treatment process is simple, and the route is simple and easy to be industrialized. The synthesis method of xylulose-5-phosphate has stable yield and accurate product structure, is suitable for large-scale industrialized preparation of xylulose-5-phosphate, and can effectively meet the market demand in the field of biological medicines.

The utility model relates to wafer automation technical field especially is a kind of wafer clamping mechanism, for with the clamping mechanical arm connection of wafer loading equipment, including the jaw for clamping wafer, the drive assembly for making the jaw clamping or release wafer and the waterproof seal box for preventing water infiltration drive assembly, the waterproof seal box is located between clamping mechanical arm and jaw;The waterproof seal box includes the loading box of top end opening and the sealing upper cover plate of buckling installation in loading box top end, the loading box is driven connection with the clamping mechanical arm, the drive assembly is installed in loading box.The utility model is applicable to humid working condition transmission operation, structure is accurate, adopts double waterproof groove design protection clamping mechanism, and waterproof sealing effect is better.