Search Results - "Gong, Nina"

Volcanic sources and diagenetic alteration of Permian–Triassic boundary K-bentonites in Guizhou Province, South China by Hong, Hanlie, Zhao, Lulu, Fang, Qian, Algeo, Thomas J., Wang, Chaowen, Yu, Jianxin, Gong, Nina, Yin, Ke, Ji, Kaipeng

“…Terrestrial Permian–Triassic boundary (PTB) sequences in South China usually contain one to three ash beds (K-bentonites), which provide evidence of a possible…”
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Color Origin of Greyish-Purple Tremolite Jade from Sanchahe in Qinghai Province, NW China by Nina Gong, Chaowen Wang, Shuai Xu

“…Greyish-purple tremolite jade has become well known in the past few years, and the origin of its color has attracted the attention of gemologists. In this…”
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Clay mineralogy of altered tephra beds and facies correlation between the Permian-Triassic boundary stratigraphic sets, Guizhou, south China by Hong, Hanlie, Fang, Qian, Wang, Chaowen, Churchman, Gordon Jock, Zhao, Lulu, Gong, Nina, Yin, Ke

“…The Permian-Triassic boundary (PTB) successions in south China contain numerous altered volcanic ash (tephra) beds (K-bentonites), which presents the…”
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Effect of acid corrosion on crack propagation of concrete beams by SHAOWEI, HU, QIYONG, CHEN, NINA, GONG

“…The effect of acid corrosion on crack propagation of concrete beams was theoretically studied by the method of crack extension resistance curve. Based on this…”
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Weathering and alteration of volcanic ashes in various depositional settings during the Permian-Triassic transition in South China: Mineralogical, elemental and isotopic approaches by Hong, Hanlie, Fang, Qian, Zhao, Lulu, Schoepfer, Shane, Wang, Chaowen, Gong, Nina, Li, Zhaohui, Chen, Zhong-Qiang

“…To better understand the alteration of volcanic ash in different depositional environments, we measured the clay mineralogy, major and trace element…”
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Influences of Sedimentary Environments and Volcanic Sources on Diagenetic Alteration of Volcanic Tuffs in South China by Gong, Nina, Hong, Hanlie, Huff, Warren D., Fang, Qian, Bae, Christopher J., Wang, Chaowen, Yin, Ke, Chen, Shuling

“…Permian-Triassic (P-Tr) altered volcanic ashes (tuffs) are widely distributed within the P-Tr boundary successions in South China. Volcanic altered ashes from…”
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Microbial proliferation coinciding with volcanism during the Permian–Triassic transition: New, direct evidence from volcanic ashes, South China by Fang, Qian, Hong, Hanlie, Chen, Zhong-Qiang, Yu, Jianxin, Wang, Chaowen, Yin, Ke, Zhao, Lulu, Liu, Zhao, Cheng, Feng, Gong, Nina, Furnes, Harald

“…Coupling with major biotic extinction, both widespread microbially mediated deposits and ash beds characterize the Permian–Triassic boundary (PTB) successions…”
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Experimental and numerical investigations of self-centering post-tensioned precast beam-to-column connections with steel top and seat angles by Cai, Xiaoning, Pan, Zuanfeng, Zhu, Yazhi, Gong, Nina, Wang, Yuwei

“…•A new kind of self-centering precast beam-to-column connections is developed.•The connection was assembled using posttensioning tendons and steel…”
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An adaptive SBFEM based on a nonlocal macro/meso damage model for fracture simulation of quasibrittle materials by Zhang, Peng, Du, Chengbin, Zhao, Wenhu, Jiang, Shouyan, Gong, Nina, Bourahla, Nouredine, Qi, Zhiyong

“…•Initial mesh is discretized using arbitrary polygon-quadtree without preset damage zones or prior refinement.•An adaptive SBFEM is proposed for modeling…”
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Fracture behavior and acoustic emission characteristics of reinforced concrete under mixed mode I-II load conditions by Gong, Nina, Hu, Shaowei, Chen, Xudong, Fan, Xiangqian, Cai, Xiaoning

“…•Mixed mode I-II fracture behavior of reinforced concrete was studied.•The damage during mixed mode I-II fracture process was concentrated in two paths.•AE…”
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Seismic behavior of self-centering prestressed precast concrete frame subassembly using steel top and seat angles by Cai, Xiaoning, Gong, Nina, Fu, C.C., Zhu, Yazhi, Wu, Jiangchuan

“…•A new kind of self-centering precast frame subassembly is developed.•Each connection was assembled using posttensioning tendons and steel angles.•Seismic…”
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Fracture behavior and mechanical properties of engineered cementitious composites exposed to long-term sulfate and chloride environments by Gong, Nina, Liu, Wenshu, Cai, Xiaoning, Fan, Xiangqian, Zhang, Peng, Geng, Fangfang, Wang, Zheyuan

“…The fracture properties of engineered cementitious composites (ECC) exposed to dry-wet cycles in sulfate and sulfate-chloride solutions were studied by…”
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Characteristics of Esketamine Prescribers Among Medicare Beneficiaries in the United States, 2019-2020 by Havlik, John L, Murphy, Michael J, Gong, Nina, Tang, Deanna, Krystal, John H

“…This cross-sectional study examines the characteristics and geographic distribution of eskatamine prescribers among Medicare beneficiaries in the US from 2019…”
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Study on Acoustic Emission Characteristics during Ⅰ-Ⅱ Mixed Mode Fracture Process in Concrete by Gong, Nina, Hu, Shaowei, Fan, Xiangqian, Wang, Qiang, Wang, Yang

“…Acoustic emission(AE)experiments were carried out for three-point bending beams with notch in different positions.The AE process parameters,state…”
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