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22 results on '"Wang, Yi-Gao"'

3. Electronic and Mechanical Properties of Tetragonal Nb2Al Under High Pressure: First-Principles Calculations

Author

Jiao, Zhen, Liu, Qi-Jun, Liu, Fu-Sheng, Wang, Wen-Peng, Wang, Yi-Gao, Li, Yong, and Liu, Zheng-Tang

Abstract

We have investigated the structure, density of states, mechanical stability, elastic properties, and Debye temperature of tetragonal Nb2Al under high pressure using the generalized gradient approximation WC (GGA-WC) functional within density functional theory (DFT). Our obtained lattice constants were in good agreement with the reported experimental and theoretical data at zero pressure. The volume decreased with the increasing pressure. The effects of pressure on the electronic properties have been discussed. The elastic constants under pressure have been calculated, which all satisfied the stability criterion, meaning that tetragonal Nb2Al was mechanical stability from 0 to 100 GPa. Then, the mechanical properties including bulk modulus B, shear modulus G, Young’s modulus E, G/B, and Poisson’s ratio ν under pressure were determined using the Voigt-Reuss-Hill method. The G/B value suggested that tetragonal Nb2Al exhibited ductile behavior under pressure. Poisson’s ratio indicated that the interatomic forces in tetragonal Nb2Al were mainly central forces. Finally, the transverse, longitudinal, and average sound velocities and Debye temperature of tetragonal Nb2Al under pressure have been estimated.

Published
2024
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15. Clinical significance of putative markers of cancer stem cells in gastric cancer: A retrospective cohort study

Author

Chen, Xiao-Long, primary, Chen, Xin-Zu, additional, Wang, Yi-Gao, additional, He, Du, additional, Lu, Zheng-Hao, additional, Liu, Kai, additional, Zhang, Wei-Han, additional, Wang, Wei, additional, Li, Chang-Chun, additional, Xue, Lian, additional, Zhao, Lin-Yong, additional, Yang, Kun, additional, Liu, Jian-Ping, additional, Zhou, Zong-Guang, additional, Hu, Jian-Kun, additional, and Mo, Xian-Ming, additional

Published
2016
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16. A new predictive model combined of tumor size, lymph nodes count and lymphovascular invasion for survival prognosis in patients with lymph node-negative gastric cancer

Author

Zhao, Lin-Yong, primary, Chen, Xiao-Long, additional, Wang, Yi-Gao, additional, Xin, Yue, additional, Zhang, Wei-Han, additional, Wang, Yin-Su, additional, Chen, Xin-Zu, additional, Yang, Kun, additional, Liu, Kai, additional, Xue, Lian, additional, Zhang, Bo, additional, Chen, Zhi-Xin, additional, Chen, Jia-Ping, additional, Zhou, Zong-Guang, additional, and Hu, Jian-Kun, additional

Published
2016
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18. A nomogram composed of clinicopathologic features and preoperative serum tumor markers to predict lymph node metastasis in early gastric cancer patients

Author

Zhao, Lin-Yong, primary, Yin, Yuan, additional, Li, Xue, additional, Zhu, Chen-Jing, additional, Wang, Yi-Gao, additional, Chen, Xiao-Long, additional, Zhang, Wei-Han, additional, Chen, Xin-Zu, additional, Yang, Kun, additional, Liu, Kai, additional, Zhang, Bo, additional, Chen, Zhi-Xin, additional, Chen, Jia-Ping, additional, Zhou, Zong-Guang, additional, and Hu, Jian-Kun, additional

Published
2016
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19. Superiority of lymph node ratio-based staging system for prognostic prediction in 2575 patients with gastric cancer: validation analysis in a large single center

Author

Zhao, Lin-Yong, primary, Li, Chang-Chun, additional, Jia, Lu-Yu, additional, Chen, Xiao-Long, additional, Zhang, Wei-Han, additional, Chen, Xin-Zu, additional, Yang, Kun, additional, Liu, Kai, additional, Wang, Yi-Gao, additional, Xue, Lian, additional, Zhang, Bo, additional, Chen, Zhi-Xin, additional, Chen, Jia-Ping, additional, Zhou, Zong-Guang, additional, and Hu, Jian-Kun, additional

Published
2016
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20. Electrical resistivity of fluid methane multiply shock compressed to 147 GPa.

Author

Wang, Yi-Gao, Liu, Fu-Sheng, Liu, Qi-Jun, and Wang, Wen-Peng

Subjects
*METHANE analysis, *ELECTRICAL resistivity, *SHOCK wave effects, *CHEMICAL decomposition, *PHASE transitions
Abstract

Shock wave experiments were carried out to measure the electrical resistivity of fluid methane. The pressure range of 89–147 GPa and the temperature range from 1800 to 2600 K were achieved with a two-stage light-gas gun. We obtained a minimum electrical resistivity value of 4.5 × 10−2 Ω cm at pressure and temperature of 147 GPa and 2600 K, which is two orders of magnitude higher than that of hydrogen under similar conditions. The data are interpreted in terms of a continuous transition from insulator to semiconductor state. One possibility reason is chemical decomposition of methane in the shock compression process. Along density and temperature increase with Hugoniot pressure, dissociation of fluid methane increases continuously to form a H2-rich fluid. [ABSTRACT FROM PUBLISHER]

Published
2018
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