全文获取类型
收费全文 | 49篇 |
免费 | 3篇 |
国内免费 | 1篇 |
专业分类
化学工业 | 5篇 |
机械仪表 | 1篇 |
轻工业 | 5篇 |
石油天然气 | 3篇 |
无线电 | 7篇 |
一般工业技术 | 3篇 |
冶金工业 | 1篇 |
原子能技术 | 9篇 |
自动化技术 | 19篇 |
出版年
2024年 | 1篇 |
2021年 | 4篇 |
2020年 | 1篇 |
2018年 | 6篇 |
2017年 | 2篇 |
2015年 | 1篇 |
2014年 | 1篇 |
2013年 | 7篇 |
2012年 | 2篇 |
2011年 | 8篇 |
2010年 | 1篇 |
2009年 | 3篇 |
2008年 | 1篇 |
2006年 | 1篇 |
2005年 | 4篇 |
2004年 | 2篇 |
2003年 | 1篇 |
2001年 | 1篇 |
1998年 | 1篇 |
1997年 | 1篇 |
1979年 | 3篇 |
1978年 | 1篇 |
排序方式: 共有53条查询结果,搜索用时 15 毫秒
51.
52.
The finite-element (FE) method is commonly used in biomedical engineering to simulate the behaviour of biological structures because of its ability to model complex shapes in a subject-specific manner. However, generating FE meshes from medical images remains a bottleneck. We present a template-based technique for semi-automatically generating FE meshes which is applicable to prospective studies of individual patients in which FE meshes must be generated from scans of the same structure taken at different points in time to study the effects of disease progression/regression. In this "template-based" meshing approach, the baseline FE (tetrahedral) volume mesh is first manually aligned with the follow-up images. The triangulated surface of the mesh is then automatically deformed to fit the imaged organ boundary. The deformed surface nodes are then smoothed using a Laplacian smoothing algorithm to correct triangle (surface nodes) distortion and thus preserve triangle quality. Finally, the internal mesh nodes are smoothed to correct distorted tetrahedral elements and thus preserve tetrahedral element quality. This template-based approach is shown to be as accurate and precise as the previous technique used by our group, while preserving element quality and volume. 相似文献
53.
Yasmine N. Baghdadi Jihad Sinno Kamal Bouhadir Mohammad Harb Samir Mustapha Digambara Patra Ali R. Tehrani-Bagha 《应用聚合物科学杂志》2021,138(45):51324
Numerous ways to reinforce epoxy resin and improve its thermomechanical properties have been attempted using organic and inorganic nanoparticles. In this paper, graphitic carbon nitride (g-C3N4) nanoparticles were synthesized and used to improve the mechanical properties and thermal stability of epoxy composites. The g-C3N4 was synthesized from cheap melamine powder using a simple one-step thermal treatment, then was used to reinforce the resin at different weight percentages (wt%). X-ray diffraction, scanning electron microscopy (SEM), and Fourier infrared spectroscopy were used to characterize the g-C3N4 and ensure its successful synthesis by studying the changes in its crystal structure, morphology, and chemical structure. The filler was dispersed in the resin using a combination of ultrasonication and high shear mixing. The results showed that the mechanical properties were optimum when 0.5 wt% g-C3N4 was used. The tensile strength and fracture toughness of the resulting epoxy composite improved by 21.8% and 77.3%, respectively. SEM was used to investigate the morphologies of cracks formed in epoxy composite specimens after the tensile testing. The SEM micrographs of the fracture surface showed a transition from a brittle to a rough morphology, signifying the enhancement in the composites' toughness. Thermogravimetric analysis showed a good improvement in degradation temperature of up to 8.86% while dynamic mechanical analysis showed that the incorporation of g-C3N4 did not affect the material's glass transition temperature. 相似文献