31results about How to "Increase the scale" patented technology

The invention provides a monocular vision inertial combination positioning navigation method. The method comprises the following steps: acquiring a video stream and an IMU data stream, and packaging and aligning the video stream and the IMU data stream; initializing the video stream and the IMU data stream, wherein the initializing process comprises the following steps: initializing vision, initializing an IMU, determining a conversion relationship between a vision coordinate system and an IMU world coordinate system, carrying out nonlinear optimization to determine a scale initial value, andcarrying out refinement estimation on the scale by using lambda I EKF; acquiring inertial navigation data in the IMU data stream, obtaining an IMU pose through a complementary filtering and pre-integration combined technology, tracking image characteristics in the video stream, and obtaining a vision pose by referring to the IMU pose variation; and determining whether the vision tracking is lostor not, carrying out motion tracking by using the IMU pose if the vision tracking is lost, and fusing the vision pose and the IMU pose through an IDSF technology if the vision tracking is not lost toobtain a final camera pose. The method aims at the disadvantages in the prior art, improves the scale precision, and achieves the effects of high precision and high robustness in the positioning process.

The invention relates to the composite technical field, in particular to a manufacturing method of metal matrix nanocomposites with high toughness. According to the manufacturing method, the size, distribution, interface structure of reinforcement bodies and the metal matrix micro-structure are effectively controlled by the combined composite process of twice ball-milling, discharging plasma in situ reaction sintering and the large strain plastic deformation technology, so that ultra-fine grain metal matrix composites with evenly distributed in situ authigenic nanoparticles and good interface combination are manufactured, and good matching of intensity and toughness is obtained.

The invention provides an automatic door lock, comprising a lock shell having a dead bolt hole molded with dead lock hole; a lock assembly installed on the lock shell panel and the lock shell bottom panel corresponding to a molded lock installation hole; a bolt mechanism installed in the lock shell capable of moving along the direction perpendicular to the lock shell panel; a locking control mechanism for controlling the bolt in the bolt mechanism extruding from and retracting into the panel; and a bolt locking mechanism matched with the door handle operating mechanism. The automatic door lock implements engagement and disengagement of the stop member with a fixed stripe and a movable stripe by coupling of the fixed and the movable stripe, the stop member is capable of engaging with the fixed and the movable stripe at different positions, incomplete unlocking operation due to extrusion of a bolt partially retracted into the shell is prevented.

The invention relates to the technical field of intelligent control and image processing, in particular to a multi-source large-scale face exposure 3D printing method. Increasing the printing area of a face exposure 3D printer is the purpose of the method, and the method comprises the following steps that searching of a maximum slice is conducted, wherein all slices in a model are traversed, and the slice with the maximum exposure area is sought; reference point obtaining is conducted, wherein the outline of the slice with the maximum exposure area is obtained, and the upper left corner point and the lower right corner point of the exposure area are determined to serve as two reference points according to the outline; an external rectangle is made in the exposure area of an original slice according to the reference points and cut, the total area needing to be exposed is obtained, the cut area is isometrically amplified with the width and height of the area needing to be exposed as the maximum limit, and the amplified image is fused with a black background with the total exposure size; and the slice is cut and processed according to the number and placing positions of projectors, and then the slice is stored. According to the multi-source large-scale face exposure 3D printing method, the exposure size can be increased, and meanwhile transportability and printability are achieved.

The invention discloses a Ni3Al-based alloy constitutive model establishment method based on representative volume elements. The method comprises the steps that (1) the representative volume elements (RVEs) used for analysis are constructed; (2) a constitutive model of a material is established based on a crystal plasticity theory, and parameters of the model are acquired through a test; (3) a constitutive model of a Ni3Al-based alloy based on the RVEs is established; and (4) the model is verified, wherein after the model is established, the tensile properties of the Ni3Al-based alloy IC10 at the temperature of 600 DEG C are subjected to simulated verification. The method has the advantages that the mechanical response of the material under a load can be predicted more effectively, and the method has a certain theoretical value and engineering significance.

The invention relates to a power transmission corridor foreign matter detection method and system based on a twin network, and belongs to the technical field of remote sensing. The method comprises the following steps: firstly, acquiring a multi-temporal remote sensing satellite image of a power transmission corridor, carrying out artificial fine labeling on a change target and a region in the multi-temporal image, then slicing and binarizing the labeled region, then training a training set containing foreign matters in the power transmission corridor by using a twin network, obtaining a modelcapable of detecting the foreign matters in the power transmission corridor, and then detecting the multi-temporal remote sensing satellite image of whether the foreign matters exist in the power transmission corridor or not by using the obtained model to judge whether the foreign matters exist in the power transmission corridor or not. The method can detect and identify various power transmission corridor foreign matters, has calculation efficiency significantly superior to that of a manual method, has higher foreign matter detection accuracy and reliability, and provides convenience for operation and maintenance of a power transmission line.

The invention relates to a spouted bed reactor and a method for synthesizing chlorinated polyvinyl chloride by using low-temperature plasmas. The reactor mainly comprises a reactor main body, a gas and solid separating zone, a gas and solid separating device and the like, wherein the gas and solid separating zone and the gas and solid separating device are arranged at the top of the reactor body.A low-temperature plasma generating device is arranged in the reactor main body and divides the interior of the reactor main body into a low-temperature plasma reaction zone and a granule descending chlorine migration zone. The method of the spouted bed reactor synthesizing chlorinated polyvinyl chloride is characterized in that the polyvinyl chloride is induced to be quickly chloridized by usingthe low-temperature plasmas, and the polyvinyl chloride granules are spouted in a low-temperature plasma discharging zone to generate chloridizing reaction; and the granules carried out of the low-temperature plasma reaction zone by air flow are deposited in the granule descending chlorine migration zone to realize circulation chloridizing of the granules. The invention utilizes the low-temperature plasma method to simultaneously activate chlorine gas and polyvinyl chloride granules at low temperature; and the product efficiency and the product quality are preferably enhanced.

The invention belongs to the technical field of flexible circuit boards, and particularly relates to a manufacturing process of a hollow flexible circuit board of a new energy vehicle. The manufacturing process of the hollow flexible circuit board of the new energy vehicle comprises the following steps: 1) forming a circuit on a copper foil of a copper foil plate of a base film; 2) printing ink onthe copper foil and the base film; 3) etching a hollow rudiment on the base film by using laser etching, and the copper is not exposed at the hollow rudiment after the laser etching; and 4) etching the location of the hollow rudiment with an etching solution. The efficiency of the hollow forming is high, the precision is high, and the using performance of the flexible circuit board is improved.

The invention relates to the technical fields of adsorption and catalysis, specifically to an adsorbent with photocatalytic activity, and a preparation method and an application thereof. The preparation method provided by the invention comprises the following steps: mixing sodium silicate and calcium hydroxide, and carrying out a hydrothermal reaction so as to obtain a mesoporous calcium silicatematerial with a surface rich in wrinkle structures; dissolving tetrabutyl titanate into ethanol so as to obtain a solution A; mixing acetic acid, water and ethanol so as to obtain a solution B; mixingthe mesoporous calcium silicate material with the solution B so as to obtain a system C; and dropwise adding the solution A into the system C, and sequentially carrying out aging, drying and calcining so as to obtain the adsorbent with photocatalytic activity. According to the invention, the mesoporous calcium silicate material with the surface rich in wrinkle structures is used as a carrier, andtitanium dioxide can be uniformly coated to the surface and internal pores of calcium silicate by a sol-gel method, so the loading capacity of titanium dioxide can be improved, and the adsorption efficiency, photocatalytic activity and catalytic decomposition effect of a material are greatly improved.

The invention discloses a flexible connecting and mounting structure for a double-helix circular structure spiral staircase. The flexible connecting and mounting structure comprises a building structure (1), a staircase structure, telescopic energy-accumulating equipment (2) with buffering performance, and a steel channel bracket (4), wherein the staircase structure is connected to the building structure (1) through the energy-accumulating equipment (2), the steel channel bracket (4) and the energy-accumulating equipment (2) in sequence; a rubber buffering belt (6) is arranged between the building structure (1) and the staircase structure; the energy-accumulating equipment (2) comprises iron plates (3), a bolt (5) and a spring; the spring (5) passes through the iron plate (3); the spring is arranged on the bolt (5); the iron plate (3) at one side of the energy-accumulating equipment is connected with the steel channel bracket (4); the iron plate (3) at the other side of the energy-accumulating equipment is connected with the building structure (1) or the staircase structure. By adopting the flexible connecting and mounting structure, the structural damage in rigid connection of the spiral staircase can be reduced effectively, and the stability, adaptability, comfort and attractiveness of the staircase are improved; construction is easy and feasible.

The invention is suitable for the technical field of image processing, and provides an image restoration method and device, a storage medium, and electronic equipment. The method comprises the following steps: obtaining a first image, wherein the first image is an image before image restoration; inputting the first image into an optimized enhanced depth super-resolution network model EDSR for processing, and outputting a second image, wherein the second image is an image after image restoration, the optimized enhanced depth super-resolution network model EDSR is used for improving the scale of image features and reducing the amount of computation, and a plurality of multi-scale convolutions included in a first residual module in the optimized enhanced depth super-resolution network model EDSR replaces a plurality of single-scale convolutions included in a second residual module in the pre-optimized enhanced depth super-resolution network model EDSR. According to the invention, the performance of the optimized enhanced depth super-resolution network model EDSR can be ensured, the amount of computation of image restoration is greatly reduced, and the efficiency of image restoration is improved.