This article investigates the influences of the effective ground motion duration (GMD) on damping reduction factor. The GMD are associated with 25 Chi-chi earthquake ground motion records and harmonic sine wave. The study shows that damping reduction factor decreases with the increasing of the damping ratio, and decreases with the increasing of the effective duration of the ground motion and the number of cycles of harmonic excitation. A nonlinear multiple regression analysis based on the statistical mean values of the present study is employed, and a modified damping reduction factor considering the effects of GMD is suggested. 相似文献
The rise of a non-democratic China as the world ‘s second largest economy, still officially subscribing to Communism or ‘Socialism with Chinese characteristics’ as its ideology1?1 In Xi Jinping's first speech as the new Chinese leader, after assuming his position as Party Secretary at the 18th Party Congress in November 2012, he declared that, “we will ensure that our Party will remain at the core of leadership in advancing the cause of socialism with Chinese characteristics”. Xinhua report on 19 November 2012. http://www.chinadaily.com.cn/china/2012cpc/2012-11/19/content_15939817.htm. By adopting the term “Socialism with Chinese Characteristics” – zhongguo tese de shehui zhuyi, the Chinese Communist Party has argued that it has not abandoned socialism by introducing foreign capital and the opening up the Chinese economy to market forces. See for example a report on Deng Xiaoping's remarks to visiting Japanese delegation in 1984, “Build Socialism with Chinese Characteristics” People's Daily, 30 June 1984. http://english.peopledaily.com.cn/dengxp/vol3/text/c1220.html., has raised the spectre of the return of the Cold War to Asia with the United States and China on opposing sides, with China backed by Russia, its former Cold War ally. But to what extent are there historical parallels between the Cold War and the current East Asian international relations system? 相似文献
Xu, H.-H., Wang, Y., Tang, P. & Wang, Y., May 2017. A new diminutive euphyllophyte from the Middle Devonian of West Junggar, Xinjiang, China and its evolutionary implications. Alcheringa 41, 524–531. ISSN 0311-5518.
A diminutive euphyllophyte, Douaphyton levigata gen. et sp. nov., is described from the upper Middle Devonian (Givetian) Hujiersite Formation of West Junggar, Xinjiang, China. The plant consists of more than three orders of axis branching, each axis being less than 2 mm wide. The second-order axes are short, laterally and alternately attached to the main axis. The third-order axes are paired and anisotomously divided, bearing the vegetative appendages or the fertile units. The fertile unit consists of a short recurved axis giving off up to four short pedicels along one side, each of which bears one to four pairs of terminal sporangia. Douaphyton has a three-dimensional branching system that has an intermediate form in the evolutionary context of euphyllophytes and lignophytes. It is also proposed that complex branching developed in multiple groups in the Middle Devonian.
*Hong-He Xu [hhxu@nigpas.ac.cn], Yao Wang [yaowang@nigpas.ac.cn], Peng Tang [pengtang@nigpas.ac.cn], Yi Wang [yiwang@nigpas.ac.cn] State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210,008, PR China. Yao Wang [yaowang@nigpas.ac.cn] University of Science and Technology of China. 96 Jinzhai Road, Hefei, Anhui Province, 230,026, PR China.相似文献