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| 1 | Neoproterozoic magmatism in eastern Himalayan terrane显示文摘Geochronological investigation on gneisses of granitic to leucogranitic compositions in Cuona,south Tibet,reveal that their protoliths formed at 808.8 ± 7.9-816.4 ± 3.4 Ma and 855.8 ± 7.0 Ma,respectively.Zircon rims from the granitic gneiss record a metamorphic age of 739.4 ± 4.3 Ma.Lu-Hf isotopic analyses on zircon grains with Neoproterozoic ages yield negative ε_(Hf)(t) values from-9.0 to-4.2,and the corresponding two-stage Hf model ages are 1965-2228 Ma.Whole-rock geochemical data indicate that all granitic gneisses are K-riched calc-alkali series.These new data together with literature data show that(1) the Himalayan terrane experienced an episode of Neoproterozoic magmatism at 850-800 Ma;(2) the Neoproterozoic magma of granitic compositions were derived from partial melting of ancient crusts,possibly due to the thermal perturbation related with the breakup of the Rodinia supercontinent. | Yuhua Wang Lingsen Zeng Li-E Gao Chunli Guo Kejun Hou Lifei Zhang Wei Wang Huiyi Sun | 2017 | Science Bulletin2017，62，6： | 5 |
| 2 | Bladder paraganglioma in adults: MR appearance in four patients显示文摘 | Haiyi Wang Huiyi Ye Aitao Guo Zhitao Wei Xu Zhang Yan Zhong Zhiwei Fan Ye Wang Dianjun Wang | 2010 | European Journal of Radiology2010，，： | 2 |
| 3 | Boosting the direct conversion of NH4HCO3 electrolyte to syngas on Ag/Zn zeolitic imidazolate framework derived nitrogen-carbon skeleton显示文摘The electrochemical reduction of NH4HCO3 to syngas can bypass the high energy consumption of high-purity CO_(2)release and compression after the ammonia-based CO_(2)capture process.This technology has broad prospects in industrial applications and carbon neutrality.A zeolitic imidazolate framework-8 precursor was introduced with different Ag contents via colloid chemical synthesis.This material was carbonized at 1000℃to obtain AgZn zeolitic imidazolate framework derived nitrogen carbon catalysts,which were used for the first time for boosting the direct conversion of NH4HCO3 electrolyte to syngas.The AgZn zeolitic imidazolate framework derived nitrogen carbon catalyst with a Ag/Zn ratio of 0.5:1 achieved the highest CO Faradaic efficiency of 52.0%with a current density of 1.15 mA·cm^(−2)at−0.5 V,a H2/CO ratio of 1-2(−0.5 to−0.7 V),and a stable catalytic activity of more than 6 h.Its activity is comparable to that of the CO_(2)-saturated NH4HCO3 electrolyte.The highly discrete Ag-N_(x)and Zn-N_(x)nodes may have combined catalytic effects in the catalysts synthesized by appropriate Ag doping and sufficient carbonization.These nodes could increase active sites of catalysts,which is conducive to the transport and adsorption of reactant CO_(2)and the stability of*COOH intermediate,thus can improve the selectivity and catalytic activity of CO. | Huiyi Li Jianmin Gao Jingjing Shan Qian Du Yu Zhang Xin Guo Shaohua Wu Zhijiang Wang | 2023 | Frontiers of Chemical Science and Engineering2023，17，9： | 0 |
| 4 | On the Spectral Moment of Quasi-Unicyclic Graphs显示文摘A connected graph G=(V(G),E(G)) is called a quasi-unicyclic graph,if there exists u0∈V(G) such that G-u0 is a unicyclic graph.Denote Q(n,d0)={G:G is a quasi-unicyclic graph of order n with G-u0 being a unicyclic graph and dG(u0)=d0}.Let A(G) be the adjacency matrix of a graph G,and let λ1(G),λ2(G),…,λn(G) be the eigenvalues in non-increasing order of A(G).The number n∑i=1λi^k(k=0,1,…,n-1) is called the k-th spectral moment of G,denoted by Sk(G).Let S(G)=(S0(G),S1(G),…,Sn-1(G)) be the sequence of spectral moments of G.For two graphs G1,G2,we have■ if for some k(k=1,2,…,n-1), and we have Si(G1)=Si(G2)(i=0,1,…,k-1) and Sk(G1) | WU Yaping GUO Huiyi YUAN Shuai | 2019 | Wuhan University Journal of Natural Sciences2019，24，6： | 0 |
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