6results about How to "Eliminate strength" patented technology

The invention discloses a 3D medical image registration method and device for contrast learning enhancement of double attention converters. The registration method comprises the steps that a 3D medical image data set is acquired and preprocessed; then down-sampling the fixed image and the floating image to create an image pyramid; then, a registration network based on a converter is established, finally, a loss function value between a fixed image and a registered image is calculated by using a loss function, and a network model is optimized through back propagation, so that a trained neural network model is obtained. According to the invention, by combining a self-attention mechanism and a cross attention mechanism, local and global context information can be comprehensively captured, and the modeling capability of image details and an overall structure is improved. And measuring the distance of the corresponding feature points between the images by using a contrast loss function. Meanwhile, the similarity between the images is further calculated by adopting a normalized total gradient and a modal independent neighborhood descriptor loss function, so that the accuracy and precision of medical image registration are improved.

A two-dimensional spectrum recording apparatus has a collimated laser light source that irradiates a sample plate on which a sample is placed. Light passing through the sample forms object light, and light not passing through the sample forms reference light that interferes with the object light, thereby forming a holographic image at the sample plate. A beam splitter receives the collimated laser after the collimated laser passes through the sample and forms separated first and second beams. A linear polarizer receives the first light beam and passes the first light beam to a polarization camera having a full Stokes mask at its input. The polarization camera records light that passes through the Stokes mask. A slit aperture receives the second light beam and transforms the second light beam into slit light applied to a diffraction grating. A diode array receives the second light beam after the second light beam passes through the diffraction grating and forms a recorded spectrum.

The invention provides a green heat-treatment-free die-casting aluminum alloy and a preparation method thereof, and relates to the technical field of aluminum alloys. The aluminum alloy comprises the following components in percentage by mass: 4%-5% of silicon, 0.2%-0.5% of iron, 0.1%-0.5% of copper, 0.1%-0.5% of zinc, 0.3%-0.6% of manganese, 0.1%-0.3% of magnesium, 0.1%-0.5% of cadmium, 0.02%-0.3% of titanium, 0.002%-0.1% of strontium, 0.001%-0.02% of yttrium, 0.002%-0.01% of scandium, 0.001%-0.01% of europium and the balance of aluminum. The composite material has excellent mechanical property, heat-conducting property and corrosion resistance.

This invention relates to the field of mortar testing, specifically to a mortar consistency testing device for environmentally friendly mortar. It includes a lead screw slide with its output end fixed to a worktable. A cover is located beside the worktable, and a cone-shaped device coaxially and detachably holds the mortar. A vibration mechanism is located at the lower end of the cover. An infrared sensor is fixedly connected to the lead screw slide near the cover, and the infrared sensor is electrically connected to a controller. An electromagnet is fixedly connected to the lead screw slide below the sensor. A support is fixedly connected to the lead screw slide below the electromagnet, and an electric actuator is fixedly connected to the upper end of the support. A retaining ring is fixedly connected to the end of the support away from the lead screw slide, and a guide rod is coaxially connected to the retaining ring. A permanent magnet is fixedly connected to the upper end of the guide rod near the lead screw slide, and a cone-shaped device coaxially with the cone-shaped device is fixed to the lower end of the guide rod. During testing, the cone is filled with mortar and fixed coaxially with the cover cylinder. The vibration mechanism disperses the mortar. The screw slide and electric actuator adjust the position of the cone, and the electromagnet attracts the guide rod. After the power is cut off, the cone falls, the infrared sensor detects the displacement and transmits it to the controller to calculate the consistency, thus achieving accurate testing.

This application relates to a stitch structure and sewing method for splicing multiple pieces of warp-knitted metal mesh, and pertains to the field of application technology of medium and large-sized metal mesh for satellite antenna reflector surfaces. The method for splicing and sewing warp-knitted metal mesh includes: S1, providing at least two pieces of warp-knitted metal mesh to be spliced; S2, overlapping the edges of adjacent pieces of mesh with a width of 1-1.5cm to form an overlap area; S3, using polyimide or aramid filaments with a specification of 200-600D as sewing thread, and sewing along the overlap area using sewing equipment, wherein the stitch spacing is 0.8-1.2cm and the stitch density is 3-5 stitches / cm. This application improves surface accuracy by using an overlap width of 1-1.5cm and automated parameter control for sewing, a stitch length of 0.8-1.2cm, a density of 3-5 stitches / cm, and high-performance polyimide or aramid thread of 200-600D. This effectively avoids the problems of easy aging and embrittlement of traditional polyester thread or webbing, and improves long-term stability.

The present invention relates to the field of aluminum alloy processing, specifically to a high-strength semi-solid die-cast aluminum alloy and a preparation method. The present invention first mixes a silicon source, a magnesium source, a copper source, an aluminum source, a titanium source, a vanadium source, and an antimony source, heats and melts them to a liquid state, and obtains a liquid aluminum alloy; graphene oxide and boric acid are used as raw materials, mixed and prepared at a high temperature to obtain boron-doped graphene, the boron-doped graphene is dispersed in ethylene glycol, cerium nitrate is added, and cerium oxide is loaded on the surface of the boron-doped graphene by a hydrothermal synthesis method to obtain boron-doped graphene loaded with cerium oxide; then boron-doped graphene loaded with cerium oxide is added to the liquid aluminum alloy to obtain an aluminum alloy semi-solid slurry; then the aluminum alloy semi-solid slurry is die-casted, and after solution treatment, water quenching and aging treatment, high-strength semi-solid die-cast aluminum alloy is obtained by furnace cooling. The semi-solid die-cast aluminum alloy prepared by the present invention has the advantages of high strength and good plasticity.