![]() ![]() The main algorithm of Stable Diffusion, which generates new images from short text descriptions, operates on this latent space representation of images. The VAE of the 1.4 stable diffusion model is generally not very good at representing small text (as well as faces, something I hope version 1.5 of the trained model will improve). For example, Anna’s name on her headcollar is slightly less readable after the decoding. Note that this roundtrip is not lossless. The type of material being tested will determine the type of accessories needed, and a single machine can be adapted to test any material within its force range simply by changing the fixturing.VAE roundtrip, from left to right: ground truth, latent space representation, decoded image Most low force testing is performed on a tabletop machine such as Instron's 6800 Series, while higher force applications require floor model frames such as those found in Instron's Industrial Series.Ī universal testing machine must be equipped with testing software and application-specific platens and accessories, such as extensometers. These machines are available in a variety of different sizes and force capacities ranging from 0.02 N to 2,000 kN. Testing EquipmentĬompression tests are performed on universal testing machines. Automotive seating engineers specify the indentation force deflection value of the foam they want in their final product, and the manufacturing location will perform the test several times per shift to guarantee that each and every seat being manufactured has the same feel in regards to softness and supportiveness. The test then measures how supportive it is by measuring the force when it is compressed to 65% of its original thickness. This test measures the initial softness of the foam by measuring the force when the foam is compressed to 25% of its original thickness. ![]() For example, the furniture, automotive, and mattress industries follow ASTM D3574, which measures the indention force deflection of polyurethane foam. There are many ASTM and ISO standards related to compression testing a variety of materials. ![]() In these cases, compressive strength can be reported as specific deformations such as 1%, 5%, or 10% of the test specimen's original height. Materials with higher ductility, (most plastics) do not rupture, but instead continue deforming until the load is no longer being applied to the specimen, but rather between the two compression platens. When brittle materials reach their ultimate compressive strength they are crushed, and the load drops drastically. The ultimate compressive strength of a material is the value of compressive stress reached when the material fails completely. Compression testing can help the engineer fine tune the balance between product strength and material conservation. For example, an engineer may want to conserve plastic by creating water bottles with thinner walls, but the bottles must still be strong enough to be packed in pallets and stacked on top of each other for transport. ![]() Common items such as tennis balls, golf balls, water bottles, protective cases, plastic pipes, and furniture are all examples of products that need to be evaluated for their compressive strength. Unlike tensile tests, which are usually conducted to determine the tensile properties of a specific material, compression tests are often performed on finished products. ![]()
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