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| 1 | Hopf bifurcation control for stochastic dynamical system with nonlinear random feedback method显示文摘 | Y.Xu S.J.Ma H.Q.Zhang | | 0，，： | 1 |
| 2 | Stability analysis of the Brusselator system with random parameter显示文摘 | Y.Xu S.J.Ma H.Q.Zhang | | 0，，： | 1 |
| 3 | 查看详情显示文摘 | Wu F Li N Su Y.F Lu H.Q.Zhang L.J.An R.Wang Z.Bao L.Y.Chen S | | 0，，04： | 1 |
| 4 | Study on the radon removal for the water system of Jiangmen Underground Neutrino Observatory显示文摘Background The Jiangmen Underground Neutrino Observatory(JUNO),a 20-kton multipurpose underground liquid scintillator detector,was proposed with the determination of the neutrino mass hierarchy as a primary physics goal.To veto the cosmogenic background and shield the central detector from the environmental radioactivity,a multi-veto system,which consists of a water Cherenkov detector and a top tracker detector,is required.In order to keep the water quality good and remove the radon from water,an ultrapure water system,a radon removal system and radon concentration measurement system have been designed.Method The JUNO ultrapure water system was designed on the basis of the water system of the Daya Bay experiment.By installing the degassing membrane devices on the water system of JUNO prototype and Daya Bay experiment which can remove radon from water,the radon removal efficiency has been measured at the conditions of different gas–liquid phase pressures and different gas concentrations in water using the radon measurement system.Result Loading carbon dioxide into the water and increasing the inlet water pressure could help to improve the radon removal efficiency of the degassing membrane devices,and the radon concentration in water can be reduced to∼0.1 Bq/m^(3).Conclusion A reliable ultrapure water production and circulation system has been designed to keep the water quality good and to reduce the radon concentration in water for JUNO water Cherenkov detector.The radon concentration in water can satisfy the requirement of JUNO by using the Liqui-Cel degassing membrane devices. | C.Guo J.C.Liu Y.P.Zhang P.Zhang C.G.Yang Y.B.Huang W.X.Xiong H.Q.Zhang Y.T.Wei Y.Y.Gan | 2018 | Radiation Detection Technology and Methods2018，2，2： | 0 |
| 5 | Modelling windwave driven by typhoon Chan-Hom (201509) in the East China Sea显示文摘Typhoon-generated waves pose a serious threat to the development of offshore wind power; therefore typical wave parameters caused by typhoon near Donghai Bridge, a demonstration area of offshore wind farm, were analysed. We pay particular attention to the dissipation term which is one of the source terms of governing equation for windwave evolution in WAVEWATCH III. Anisotropic energy dissipation in the wave propagation direction is considered and further applied in our model. A good agreement is observed by comparison with in situ data. Furthermore, the new improved model is used to simulate and forecast wave evolution caused by Chan-Hom(201509). The evolution of typical wave parameters i.e. significant wave height and mean wave period were discussed in the East China Sea, especially near Donghai Bridge. | H.Q.Zhang B.C.Nie | 2016 | Theoretical & Applied Mechanics Letters2016，6，6： | 0 |
| 6 | ON FATIGUE CRACK PATH DEVIATION AT ELEVATED TEMPERATURE IN ELECTRON BEAM REPAIRED WELDMENTS OF TURBINE DISK显示文摘Fatigue crack growth behaviors in electron beam weldments of a nickel-base superalloy are studied. The objective of this paper is to discuss effects of the inhomogeneity of mechanical performance on fatigue crack growth (FCG) rate and crack path deviation (CPD). The base metal served in a turbine disk of aerospace engine was selected to fabricate bead-on-plate weldments by using electron beam welding. Some wedge-type opening loading specimens, notched in three different zone of weld metal, HAZ and base metal, were employed and performed fatigue crack growth tests at 650℃. The results show that the fatigue crack growth of electron beam welded joints is instable due to the influence of mechanical heterogeneities. Owing to the crack deviation at the weld metal and hcat-affected-zone (HAZ), the effective growth driving force at the tip of fatigue crack was reduced with the reduction of the effective stress intensity factor (SIF) which finally causes fatigue crack rate decrease. Fatigue crack was strongly affected by size and the symmetrical characteristics of the plastic zone at the crack tip, which means that the integrity of the welded structure containing the fatigue crack mainly depended on the toughness of the low strength zone. | H.Q.Zhang H.Y.Zhao Y.H.Zhang L.H.Li X.A.Zhang | 2004 | Acta Metallurgica Sinica(English Letters)2004，17，4： | 0 |
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