The article is to study the development of computer-aided design of X-ray microtomography—the device for investigating the structure and construction of three-dimensional images of organic and inorganic objects on th...The article is to study the development of computer-aided design of X-ray microtomography—the device for investigating the structure and construction of three-dimensional images of organic and inorganic objects on the basis of shadow projections. This article provides basic information regarding CAD of X-ray microtomography and a scheme consisting of three levels. The article also shows basic relations of X-ray computed tomography, the generalized scheme of an X-ray microtomographic scanner. The methods of X-ray imaging of the spatial microstructure and morphometry of materials are described. The main characteristics of an X-ray microtomographic scanner, the X-ray source, X-ray optical elements and mechanical components of the positioning system are shown. The block scheme and software functional scheme for intelligent neural network system of analysis of the internal microstructure of objects are presented. The method of choice of design parameters of CAD of X-ray microtomography aims at improving the quality of design and reducing costs of it. It is supposed to reduce the design time and eliminate the growing number of engineers involved in development and construction of X-ray microtomographic scanners.展开更多
Felids,during intense activities such as jumping and sprinting,adjust their posture by twisting and stretching their body to disperse limb impact and minimize injury.This self-stabilization mechanism has garnered sign...Felids,during intense activities such as jumping and sprinting,adjust their posture by twisting and stretching their body to disperse limb impact and minimize injury.This self-stabilization mechanism has garnered significant attention for inspiring biometric robot design.This study investigates the flexibility and cushioning characteristics of a cat’s spine,focusing on its biomechanical properties.A high-fidelity 3D model was used to test the range of motion(ROM)under six conditions,simulate dorsiflexion to analyze stress distribution.The torsional and compressive stiffness were tested by using five cat spinal specimens.the flexibility principles of the flexible cat’s spine were explained via morphological insights.Results indicate that the cat spine has the least rotational stiffness in axial rotation,followed by extension and lateral bending,with a compressive stiffness of 53.62±4.68 N/mm.Stress during dorsiflexion is evenly distributed across vertebrae.The vertebrae heights account for 90.34%of total spinal length with a mean height-to-width ratio of 1.04.Cats’spines,with more articulations and elongated vertebrae,allow for significant twisting and bending,aiding in rapid body posture adjustments and impact mitigation.These biomechanical traits could inspire the design of robots for confined rescue operations.展开更多
文摘The article is to study the development of computer-aided design of X-ray microtomography—the device for investigating the structure and construction of three-dimensional images of organic and inorganic objects on the basis of shadow projections. This article provides basic information regarding CAD of X-ray microtomography and a scheme consisting of three levels. The article also shows basic relations of X-ray computed tomography, the generalized scheme of an X-ray microtomographic scanner. The methods of X-ray imaging of the spatial microstructure and morphometry of materials are described. The main characteristics of an X-ray microtomographic scanner, the X-ray source, X-ray optical elements and mechanical components of the positioning system are shown. The block scheme and software functional scheme for intelligent neural network system of analysis of the internal microstructure of objects are presented. The method of choice of design parameters of CAD of X-ray microtomography aims at improving the quality of design and reducing costs of it. It is supposed to reduce the design time and eliminate the growing number of engineers involved in development and construction of X-ray microtomographic scanners.
基金funded by the Guangdong Basic and Applied Basic Research Foundation(2023A1515110378)the National Natural Science Foundation of China(Nos.12402368).
文摘Felids,during intense activities such as jumping and sprinting,adjust their posture by twisting and stretching their body to disperse limb impact and minimize injury.This self-stabilization mechanism has garnered significant attention for inspiring biometric robot design.This study investigates the flexibility and cushioning characteristics of a cat’s spine,focusing on its biomechanical properties.A high-fidelity 3D model was used to test the range of motion(ROM)under six conditions,simulate dorsiflexion to analyze stress distribution.The torsional and compressive stiffness were tested by using five cat spinal specimens.the flexibility principles of the flexible cat’s spine were explained via morphological insights.Results indicate that the cat spine has the least rotational stiffness in axial rotation,followed by extension and lateral bending,with a compressive stiffness of 53.62±4.68 N/mm.Stress during dorsiflexion is evenly distributed across vertebrae.The vertebrae heights account for 90.34%of total spinal length with a mean height-to-width ratio of 1.04.Cats’spines,with more articulations and elongated vertebrae,allow for significant twisting and bending,aiding in rapid body posture adjustments and impact mitigation.These biomechanical traits could inspire the design of robots for confined rescue operations.
