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1.
Pedro Ribeiro 《International journal for numerical methods in engineering》2004,61(15):2696-2715
A p‐version, hierarchical finite element for curved, moderately thick, elastic and isotropic beams is introduced. The convergence properties of the element are analysed and some results are compared with results published elsewhere or calculated using a commercial finite element package. It is verified that, with the proposed element, shear locking does not affect the computation of the natural frequencies and that low dimensional, accurate models are obtainable. Geometrically non‐linear vibrations due to finite deformations, which occur for harmonic excitations with frequencies close to the first three natural frequencies of vibration, are investigated using Newmark's method. The influence of the thickness, longitudinal inertia and curvature radius on the dynamic behaviour of curved beams are studied. Copyright © 2004 John Wiley & Sons, Ltd. 相似文献
2.
The aim of this study was to examine the reliability and validity of a French version of the Revised Children's Manifest Anxiety Scale (RCMAS). A sample of 2,666 school-age French-Canadian children completed the questionnaire. With regard to factor structure, the 5-factor model found in U.S. normative samples was confirmed. The internal consistency of the 5 scales and of the 2 global scales was good to excellent. Test-retest reliabilities after a 6-month period were also similar to those of the original version. Finally, the concurrent validity, assessed by a correlation with the State-Trait Anxiety Inventory for Children, was also found to be good. Results of the present study show that the French version of the RCMAS is a good instrument to assess anxiety in children. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
3.
本文结合为某机械厂开发的实用计算机辅助工艺设计系统(JJCAPP),论述了一种兼有派生式和创成式特点的综合式工艺自动设计方法. 相似文献
4.
杨怀义 《数字社区&智能家居》2006,(7):187-188
用CorelDraw创作设计中,文字及路径是必不可少的要素,利用文本适配路径及其属性,我们可以制作出很多其他图形处理软件所不能达到的特殊效果。 相似文献
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This paper is concerned with establishing a delay‐dependent bounded real lemma (BRL) for singular linear parameter‐varying (LPV) systems with time‐variant delay. In terms of linear matrix inequality, a delay‐dependent BRL is presented to ensure singular time‐delay LPV systems to be admissible and satisfy a prescribed H∞ performance level. The BRL is obtained based on the construction of a parameter‐dependent Lyapunov–Krasovskii functional. The effectiveness of the proposed approach is shown by several numerical examples. Copyright © 2011 John Wiley & Sons, Ltd. 相似文献
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Serge Autexier 《International Journal of Software and Informatics》2015,9(2):259-277
Semi-structured documents and data pervade modern workflows in all areas. Collaborative work and version management rely on effective, automatic difference analysis and three-way difference analysis tools. In our effort to develop a three-way difference analysis for tree-structured documents we developed a kernel three-way difference
algorithm which extends the equality-based procedures, such as GNU diff3, by considering the similarity of documents in the difference analysis as well as to ignore the order of data if that is semantically suitable. As a result we obtain difference analysis algorithms that can be more fine-tuned to the application domain. Moreover, the equality-based counter-parts of our three-way difference analysis algorithms has the idempotency property, which the current three-way diff algorithms lacks. 相似文献
10.
随着Flash软件版本的不断升级,传统的一些功能也有了颠覆性的改变。2013年底在建设课题《艺术设计网络辅助教学平台的开发研究》(项目编号12535201)过程中,为《Flash动画制作》网络课程录制微课视频时,比平时执教中更深切地体会到了这一点。其中感触最深的就是"动作补间动画"的全新突破。本文从老版本与新版本的使用对比,最终得出结论,是执教者的经验总结。 相似文献