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| 1 | Finite element investigation of the poroelastic effect on the Xinfengjiang Reservoir-triggered earthquake显示文摘Coulomb failure stress changes (ΔCFS) are used in the study of reservoir-induced seismicity (RIS) generation.The threshold value of ΔCFS that can trigger earthquakes is an important issue that deserves thorough research.The M s 6.1 earthquake in the Xinfengjiang Reservoir in 1962 is well acknowledged as the largest reservoir-induced earthquake in China.Therefore, it is a logical site for quantitative calculation of ΔCFS induced by the filling of the reservoir and for investigating the magnitude of CFS that can trigger reservoir seismic activities.To better understand the RIS mechanism, a three-dimensional poroelastic finite element model of the Xinfengjiang Reservoir is proposed here, taking into consideration of the precise topography and dynamic water level.We calculate the instant changes of stress and pore pressure induced by water load, and the time variation of effective stresses due to pore water diffusion.The CFS on the seismogenesis faults and the accumulation of strain energy in the reservoir region are also calculated.Primary results suggest that the reservoir impoundment increases both pore pressure and CFS on the fault at the focal depth.The diffusion of pore pressure was likely the main factor that triggered the main earthquake, whereas the elastic stress owing to water load was relatively small.The magnitude of CFS on seismogenesis fault can reach approximately 10 kPa, and the ΔCFS values at the hypocenter can be about 0.7-3.0 kPa, depending on the fault diffusion coefficient.The calculated maximum vertical subsidence caused by the water load in the Xinfengjiang Reservoir is 17.5 mm, which is in good agreement with the observed value of 15 mm.The accumulated strain energy owing to water load was only about 7.3×10 11 J, even less than 1% of the seismic wave energy released by the earthquake.The reservoir impoundment was the only factor that triggered the earthquake. | CHENG HuiHong ZHANG Huai ZHU BoJing SUN YuJun ZHENG Liang YANG ShaoHua SHI YaoLin | 2012 | Science China Earth Sciences2012，55，12： | 11 |
| 2 | Porosity and permeability evolution and evaluation in anisotropic porosity multiscale-multiphase-multicomponent structure显示文摘Based on the hybrid hypersingular integral equation-lattice Boltzmann methods (HHIE-LBM), the porosity and permeability evolution and evaluation process in anisotropic saturated porosity multiscale-multiphase-multicomponent (ASP-MS-MP-MC) structures under ultra high temperature and pressure conditions was analyzed on parallel CPU and GPU platforms. First, virtual physical models at multi-spatial scales (2 μm, 5 μm and 10 μm) were restructured by computerized microtomography technology and data. Second, using HHIE-LBM methods, the anisotropic porosity and permeability tensor at core level and pore level under ultra high temperature and pressure conditions were calculated. Third, the evolution and evaluation process of the porosity and permeability as a function of multi temporal spatial scales was investigated. Finally, the relationship between porosity and permeability and ASP-MS-MP-MC structures (micro-meso-macro-scale) was explored. | ZHU BoJing CHENG HuiHong QIAO YanChao LIU Chang SHI YaoLin ZHANG Kai SUN DongSheng LIN WeiRen | 2012 | Chinese Science Bulletin2012，57，4： | 11 |
| 3 | Application of flow driven pore-network crack model to Zipingpu reservoir and Longmenshan slip显示文摘The study has analyzed the relationship between the water-drainage sluice process of reservoir, stress triggers and shadows of earthquake and porosity variability of fault slip zone. First, the pore pressure, pressure gradient, viscous stress and Reynolds stress to reservoir-earthquake fault slip problem are analyzed, and these are un-negligible factors of the extended coulomb failure stress under ultra-high temperature and pressure condition. Second, the porosity tensor and permeability tensor are studied, the relationship between Zipingpu reservoir and Longmenshan slip has been analyzed, and the extended viscous stress and Reynolds stress as function of time and infiltration process are obtained. Last, some primary conclusions about the flow-solid coupled facture mechanism to the Zipingpu reservoir and Longmenshan slip problem are presented, which can help understand the flow-solid coupled facture mechanism of reservoir-coseismic fault slip problem. | ZHU BoJing LIU Chang SHI YaoLin SUN DongSheng ZHANG Kai | 2011 | Science China(Physics,Mechanics & Astronomy)2011，54，8： | 8 |
| 4 | Development and validation of abiotic ligand model for nickel toxicity to wheat(Triticum aestivum)显示文摘A terrestrial biotic ligand model(t-BLM) was developed to predict nickel toxicity to wheat(Triticum aestivum) root elongation in hydroponic solutions. The competitive effects of five major cations(Ca^(2+), Mg^(2+), Na^+, K^+and H^+) on Ni toxicity were investigated and Mg^(2+)was found to be a strong competitor, while H+showed less competing effect. Besides free Ni^(2+),the toxicity induced by the species NiHCO_3^+ was non-neglect able at pH > 7 because NiHCO_3^+ occupied a significant fraction of total Ni under such condition. Thus, a t-BLM including Ni^(2+), NiHCO_3^+, Mg^(2+), and H+could successfully predict the nickel toxicity to wheat root elongation and it performed better prediction than the conventional free ion activity model.In addition, the model was examined with two sets of independent experiments, which contained multiple cations and low-molecular-weight organic acids to mimic the rhizosphere condition. The developed t-BLM well predicted nickel toxicity in both experiments since it can account in both complexation and competition effects, suggesting its potential to be used in a complicated matrix like soil solution. This study provides direct evidence that the t-BLM is a reliable method for the risk assessment of nickel in terrestrial system. | Yang Jiang Xueyuan Gu Bojing Zhu Cheng Gu | 2017 | Journal of Environmental Sciences2017，29，12： | 3 |
| 5 | Finite element analysis of steep excavation slope failure by CFS theory显示文摘The distribution of Coulomb failure stress (CFS) change in the steep excavation slope is calculated by finite element method in this paper,and the failure mechanics under different conditions have been investigated.Comparing the CFSs before and after the slope excavation (stress loading and unloading processes),the dangerous internal zone and the most likely failure external area are attained.Given the shear cracks on the top surface while tensile stress or cracks along the toe of the slope,we analyze the high cutting-angle steep slope in Kaixian county of the Three Gorges Reservoir region.We bring forward that the peak value of CFS after excavation can reach to the order of 0.1MPa,which is greatly higher than that of before.Our preliminary results are useful for optimizing the reinforcement structure during the steep slope stabilization engineering. | Huihong Cheng Huai Zhang Bojing Zhu Yaolin Shi | 2012 | Earthquake Science2012，25，2： | 2 |
| 6 | Electron acceleration in interaction of magnetic islands in large temporal-spatial turbulent magnetic reconnection显示文摘A new combined Fermi, betatron, and turbulent electron acceleration mechanism is proposed in interaction of magnetic islands during turbulent magnetic reconnection evolution in explosive astrophysical phenomena at large temporal-spatial scale(LTSTMR), the ratio of observed current sheets thickness to electron characteristic length, electron Larmor radius for low-β and electron inertial length for high-β, is on the order of 10^(10)–10^(11); the ratio of observed evolution time to electron gyroperiod is on the order of 10~7–10~9).The original combined acceleration model is known to be one of greatest importance in the interaction of magnetic islands; it assumes that the continuous kinetic-dynamic temporal-spatial scale evolution occurs as two separate independent processes.In this paper, we reconsider the combined acceleration mechanism by introducing a kinetic-dynamic-hydro full-coupled model instead of the original micro-kinetic or macro-dynamic model.We investigate different acceleration mechanisms in the vicinity of neutral points in magnetic islands evolution, from the stage of shrink and breakup into smaller islands(kinetic scale), to the stage of coalescence and growth into larger islands(dynamic scale), to the stages of constant and quasi-constant(contracting-expanding) islands(hydro scale).As a result, we give for the first time the acceleration efficiencies of different types of acceleration mechanisms in magnetic islands' interactions in solar atmosphere LTSTMR activities(pico-, 10^(–2)–10~5 m; nano-, 10~5–10~6 m; micro-, 10~6–10~7 m; macro-, 10~7–10~8 m; large-,10~8–10~9 m). | BoJing Zhu Hui Yan David A Yuen YaoLin Shi | 2019 | Earth and Planetary Physics2019，3，1： | 1 |
| 7 | Mixed-mode stress intensity factors of 3D interface crack in fully coupled electromagnetothermoelastic multiphase composites 显示文摘 | Zhu Bojing Shi Yaolin Qin Taiyan Sukop Michael Yu Shaohua Li Yongbin | 2009 | International Journal of Solids and Structures2009，46，13： | 1 |
| 8 | Submicron Volume Roughness & Asperity Contact Friction Model for Principle Slip Surface in Flash Heating Process显示文摘Based on focused ion beam and shear friction apparatus data,the multi-resolutions(0.2nm–5μm) volume roughness & asperity contact(VR & AC) three-dimensional structure on principle slip surface interface-surface(PSS-IS) is measured on high performance computational platform; and physical plastic-creep friction model is established by using hybrid hyper-singular integral equation & lattice Boltzmann & lattice Green function(BE-LB-LG). The correlation of rheological property and VR & AC evolution under transient(10μs) macro-normal stress(18–300MPa) and slip rate(0.25–7.5m/s) are obtained; and the PSS-IS friction in co-seismic flash heating is quantitative analyzed for the first time. | Bojing Zhu David A.Yuen Yaolin Shi Huihong Cheng | 2015 | Journal of Earth Science2015，26，1： | 1 |
| 9 | Three-dimensional Pore-network Cracks Transient Hydrofacturing-liquefaction in Tight Sandstone under Seismic Wave & Electromagneto-thermo-elastic Fields显示文摘 | Yongbing Li | 2014 | 地球科学期刊(中英文版)2014，4，2： | 0 |
| 10 | Application of StrucGP in medical immunology:site-specific N-glycoproteomic analysis of macrophages显示文摘The structure of N-glycans on specific proteins can regulate innate and adaptive immunity via sensing environmental signals.Meanwhile,the structural diversity of N-glycans poses analytical challenges that limit the exploration of specific glycosylation functions.In this work,we used THP-1-derived macrophages as examples to show the vast potential of a N-glycan structural interpretation tool StrucGP in N-glycoproteomic analysis.The intact glycopeptides of macrophages were enriched and analyzed using mass spectrometry(MS)-based glycoproteomic approaches,followed by the large-scale mapping of site-specific glycan structures via StrucGP.Results revealed that bisected GlcNAc,core fucosylated,and sialylated glycans(e.g.,HexNAc4Hex5Fuc1Neu5Ac1,N4H5F1S1)were increased in M1 and M2 macrophages,especially in the latter.The findings indicated that these structures may be closely related to macrophage polarization.In addition,a high level of glycosylated PD-L1 was observed in M1 macrophages,and the LacNAc moiety was detected at Asn-192 and Asn-200 of PD-L1,and Asn-200 contained Lewis epitopes.The precision structural interpretation of site-specific glycans and subsequent intervention of target glycoproteins and related glycosyltransferases are of great value for the development of new diagnostic and therapeutic approaches for different diseases. | Pengfei Li Zexuan Chen Shanshan You Yintai Xu Zhifang Hao Didi Liu Jiechen Shen Bojing Zhu Wei Dan Shisheng Sun | 2023 | Frontiers of Medicine2023，17，2： | 0 |
| 11 | Submicron size-scale mapping of carbonate effective elastic properties from FIB-SEM images and finite element method显示文摘In this paper,an automatic unstructured focused ion beam(FIB) and scanning electron microscopy(SEM) images induced representative volume element(RVE) finite element(FE) method is developed to predict submicron scale carbonate rock effective Young's and bulk moduli and Poisson's ratio on parallel CPU-GPU platform.Based on high resolution-contrast surface morphology and internal fabnc-texture structure images from carbonate rock specimen(covered 0.12-64 μm^2 area and8000 μm^3 domain),the cubic RVE FE models are constructed from different sites through Avizo with user-defined parameters Matlab coding.The effective Young's and bulk moduli and Poisson's ratio of the different RVEs and porosity and pore size are computed by using periodic boundary condition in the well-known FE software Abaqus.FE mesh sensitivity analysis has been conducted where all moduli converge to a certain constant value at larger FE mesh density.The effect of fabric-texture(pore size,shape,and distribution) on the elastic properties is discussed.The correlations between the computed effective elastic properties and pore size,porosity,RVE size have been established.The simulation results show that the effective Young's and bulk moduli and Poisson's ratio have strong anisotropic behavior and depend on RVE size,porosity and pore size.The RVE size,porosity and pore size are three independent factors in affecting of the effective elastic moduli,the effect mechanism of porosity and pore size is same while the effect mechanism of RVE size is difference. | CHENG HuiHong ZHU BoJing David A YUEN SHI YaoLin | 2017 | Science China Earth Sciences2017，60，3： | 0 |
| 12 | Homojunction structure amorphous oxide thin film transistors with ultra-high mobility显示文摘Amorphous oxide semiconductors(AOS)have unique advantages in transparent and flexible thin film transistors(TFTs)applications,compared to low-temperature polycrystalline-Si(LTPS).However,intrinsic AOS TFTs are difficult to obtain field-effect mobility(μFE)higher than LTPS(100 cm^(2)/(V·s)).Here,we design ZnAlSnO(ZATO)homojunction structure TFTs to obtainμFE=113.8 cm^(2)/(V·s).The device demonstrates optimized comprehensive electrical properties with an off-current of about1.5×10^(-11)A,a threshold voltage of–1.71 V,and a subthreshold swing of 0.372 V/dec.There are two kinds of gradient coupled in the homojunction active layer,which are micro-crystallization and carrier suppressor concentration gradient distribution so that the device can reduce off-current and shift the threshold voltage positively while maintaining high field-effect mobility.Our research in the homojunction active layer points to a promising direction for obtaining excellent-performance AOS TFTs. | Rongkai Lu Siqin Li Jianguo Lu Bojing Lu Ruqi Yang Yangdan Lu Wenyi Shao Yi Zhao Liping Zhu Fei Zhuge Zhizhen Ye | 2023 | Journal of Semiconductors2023，44，5： | 0 |
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