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您的检索式：作者名="Dacheng Shi"
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| 1 | Preliminary site classification of free-field strong motion stations based on Wenchuan earthquake records显示文摘During the great Wenchuan earthquake, about 460 permanent free-field stations in National Strong Motion Observation Network System (NSMONS) of China captured the main shock acceleration records. These records can be applied to site effect analyses, and then the site classification of those permanent stations can be carried out firstly, which will served as the fundamental information for further research. In this paper, the site of near-fault stations is classified by horizontal-to-vertical spectral ratio (HVSR) method according to the site class description of Japan earthquake resistant design code and response spectral shapes (RSS) method following the site class description of the 1997 Uniform Building Code (UBC) provisions. Then based on the detailed borehole data of those free-field stations, the equivalent shear wave velocity and overburden thickness are calculated and the site classifications are given by Chinese code for seismic design of buildings. Furthermore, for the stations having successful microtremor test data, the site dominant periods are computed to verify the results of site classification. Finally, combined with all the above results, the recommended site classes of near-fault permanent free-field stations are given. | Ruizhi Wen Yefei Ren Zhenghua Zhou Dacheng Shi | 2010 | Earthquake Science2010，23，1： | 15 |
| 2 | Improved HVSR site classification method for free-field strong motion stations validated with Wenchuan aftershock recordings显示文摘Local site conditions play an important role in the effective application of strong motion recordings.In the China National Strong Motion Observation Network System(NSMONS),some of the stations do not provide borehole information,and correspondingly,do not assign the site classes yet.In this paper,site classification methodologies for free-field strong motion stations are reviewed and the limitations and uncertainties of the horizontal-to-vertical spectral ratio(HVSR) methods are discussed.Then,a new method for site classification based on the entropy weight theory is proposed.The proposed method avoids the head or tail joggle phenomenon by providing the objective and subjective weights.The method was applied to aftershock recordings from the 2008 Wenchuan earthquake,and 54 free-field NSMONS stations were selected for site classification and the mean HVSRs were calculated.The results show that the improved HVSR method proposed in this paper has a higher success rate and could be adopted in NSMONS. | Wen Ruizhi Ren Yefei Shi Dacheng | 2011 | Earthquake Engineering and Engineering Vibration2011，10，3： | 14 |
| 3 | 4-3 New Insight into Power-law Behavior of Fragment Size Distributions in the C60 Multifragmentation Regime显示文摘Previous experimental work[1] has shown that a Phase Transition (PT) in C60 multifragmentation induced bynanosecond laser occurs at almost constant temperature covering a wide range of laser fluency. However, up tonow, to the phase transition occurring in C60 systems much uncertainty remains regarding its nature. In particular,whether it, like those occurring in other finite systems such as nuclei[2], is also related to a liquid-to-gas phasetransition. If so, at the critical temperature, the size distributions of primary intermediate-mass fragments in themultifragmentation regime should obey power law with a particular scaling exponent[3]. | Qian Dongbin Zhang Xujie Shi Fudong Zhang Dacheng Zhu Xiaolong Yang Jie Ma Xinwen | 2014 | IMP & HIRFL Annual Report2014，，1： | 0 |
| 4 | Olefin-linked covalent organic frameworks with twisted tertiary amine knots for enhanced ultraviolet detection显示文摘Though Olefin-linked covalent organic frameworks(oCOFs)possess excellentπ-electron delocalization,the barely reversible olefin linkage brings challenges for oCOFs’synthesis and functionalization.Here,we synthesize new oCOFs with tertiary amine knots which have twisted configuration and electron-donating nature.Investigation into the structural variation and photoelectric performance shows that the twisted configuration of oCOF-TFPA could favor to the intramolecular charge transfer process and reduce the pos-sibility of aggregation-caused quenching.Photoelectrical measurements and electric band structure cal-culation both verify the superiority of this oCOFs’structure in photoelectric sensing. | Qianying Guo Hongyan Ji Lei Yang Daizong Ji Zhaolin Ai Shi Luo Jiatao Sun Yunqi Liu Dacheng Wei | 2022 | Chinese Chemical Letters2022，33，5： | 0 |
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