当前女子平衡木发展趋势的研究

以37届世锦赛团体、全能和单项决赛运动员为对象,结合悉尼奥运会和2001年、2002年世锦赛等资料,从上法、木中和下法动作的发展,以及完成动作的质量等方面,对当代平衡木的发展趋势作了比较系统的分析研究,希望对我国平衡木的训练提供参考意见.     

Manufacture and Date of a Goryeo dynasty Sutra Box with Mother-of-pearl Inlaid Decoration at the Rijksmuseum,Amsterdam

Currently, about ten Goryeo dynasty (918–1392 CE) sutra boxes are preserved in museums in Korea, Japan, the United States, the Netherlands, and the United Kingdom. This article is the result of an examination of a sutra box in the collection of the Rijksmuseum, Amsterdam (hereafter ‘Rijksmuseum sutra box’), which was first introduced to a European audience in the Transactions and Proceedings of the Japanese Society, in 1913–1914. The Rijksmuseum sutra box differs from other Goryeo sutra boxes. With its altered structure and modified motifs, this box bears significant value, not only for the research of thirteenth-century Goryeo mother-of-pearl art, but also for the study of cross-cultural adaptations in East Asian lacquer art. This article investigates the date of manufacture of the sutra box by analysing the manufacturing techniques and its various original and modified parts. For this, an X-ray radiograph was carried out for the first time. As a result, discoveries have been made regarding the structure and decoration of the lower part, which has been modified and is different from Goryeo mother-of-pearl sutra boxes. Finally, this paper reconsiders conservation and repair of Goryeo sutra boxes, as illuminated by an understanding of the original and repaired parts of this box.     

简支梁振动试验分析

通过振动试验,得到了简支矩形等截面梁的挠度和频率随荷载变化的曲线,结果与破损模态静力试验结果一致。     

ANSYS非线性有限元软件在桥梁结构分析中的应用

有限无法是分析复杂工程结构的一种非常有效的数值方法．本文通过叙述采用ANSYS进行钢箱梁结构分析的实施步骤，介绍了使用ANSYS非线性有限元软件进行桥梁结构分析的方法．     

自聚焦克尔类电介质中非傍轴光束调制非稳的研究

Propagation stability of non-paraxial beam in nonlinear Kerr media is investigated with a linear stability method.Both theoretical analysis and numerical simulation show that modulation instability(MI) gain spectrum has three different distribution features determined by the times of incident power P0 and the non-paraxial parameter a. Furthermore,the corresponding criterion is put forward to distinguish the three different distributions.     

融贯中西的艺术孤行者——庄华岳与赵无极

庄华岳1935年考进国立艺术专科学校,与赵无极同班,感情甚笃,同是班里最为出类拔萃的.庄华岳在校学习时就显露出过人的天份和才能,成为老师眼中的奇才,作品受到业师吴大羽及同学赵无极的激赏.吴师拟荐庄出国留学,因抗战爆发终成泡影.后庄华岳几十年从事教育工作.赵无极毕业后赴法深造,成就为一代大师.1957年赵无极曾误信传言,...     

多用电表测电阻应注意三个问题

介绍了用多用电表测电阻应注意的几个问题：原理问题；选挡调零与读数问题；探索电学黑箱问题。     

Flexural Behaviour of High－Strength Steel Fiber－Reinforced Concrete Beams

ＦｌｅｘｕｒａｌＢｅｈａｖｉｏｕｒｏｆＨｉｇｈ－ＳｔｒｅｎｇｔｈＳｔｅｅｌＦｉｂｅｒ－ＲｅｉｎｆｏｒｃｅｄＣｏｎｃｒｅｔｅＢｅａｍｓＱｉａｎＣｈｕｎｘｉａｎｇ（钱春香）（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉｎｅｅｒｉ...     

锚杆框架梁支护在雪道边坡防护中的应用

随着我国经济的快速发展,基础设施发展迅速,建设过程中新的施工技术层出不穷,其中对于工程岩体分化严重、结构面较发育的高挖方边坡,通常采用锚杆框架梁结构支护。然而,对于高山滑雪中心滑雪赛道两侧高陡边坡,除了要实现边坡稳定的同时还需考虑如何防止雪道污染的问题。本文结合北京2022年冬奥会高山滑雪中心第二标段的工程实践,详细阐述了兼具边坡支护和防止雪道污染的锚杆框架梁支护体系的设计原则、设计内容、施工工艺,并说明了施工中的一些细节或要点。实践证明该支护体系合理,不仅确保了边坡的安全稳定和防止了雪道污染,同时具有造价低、施工机动性强的特点,可以在类似的雪道施工中推广。     

用高斯光束单丝衍射来监测拉丝工艺中的细丝直径

提出一种用动态法测细丝直径的方法。用微机配合可以监测拉丝工艺中的细丝直径,精度在5％以内。