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| 1 | SUPERPLASTICITY IN SiC_w/ZK60 COMPOSITE显示文摘The superplastic deformation behavior of SiCw/ZK60 composite was investigated at temperatures ranging from 573K to 723K and at initial strain rates ranging from 8.3× 10-4 S-1 to 8.3× 10-2 S-1. A maximum elongation of 200% with a m-value of 0.35was obtained at 613K and a initial strain rate of 1.67×10-2 S-1. The apparent activation energy (98k J/mol) approximates that for grain boundary diffusion (92k J/mol)in magnesium. It is proposed that the dominant mechanism of superplastic deformation in the present composite is grain boundary sliding accommodated by diffusional transport, besides, interracial sliding plays an important role in the superplastic deformation. | F.Yan K.Wu M.Zhao | 2003 | Acta Metallurgica Sinica(English Letters)2003，16，3： | 4 |
| 2 | HIGH-TEMPERATURE LOW CYCLE FATIGUE BEHAVIOR OF NICKEL BASE SUPERALLOY GH536显示文摘Low cycle fatigue tests on nickel base superalloy GH536 were performed at 600, 700 and 800℃. The strain-life and cyclic stress-strain relationship were given at various temperatures. The change in fatigue life behavior and fatigue parameters with tem- perature increasing was discussed. At low and intermediate total strain amplitudes, the fatigue life was found to decrease with increasing temperature. | M.Zhao, L. Y. Xu, K.S. Zhang and B. Y. Yang Department of Aeroengines and Thermal Power, Northwestern Polytechnical University, Box 184, Xi’an 710072, China | 2001 | Acta Metallurgica Sinica(English Letters)2001，14，5： | 1 |
| 3 | 查看详情显示文摘 | Y.-Q.Hou D.-M.Zhuang G.Zhang M.Zhao M.-S.Wu | | 0，，： | 1 |
| 4 | Assessment of COVID-19 aerosol transmission in a university campus food environment using a numerical method显示文摘With the prevalence of COVID-19,the phenomenon of viruses spreading through aerosols has become a focus of attention.Diners in university dining halls have a high risk of exposure to respiratory droplets from others without the protection of face masks,which greatly increases the risk of COVID-19 transmission.Therefore,the transmission mechanism of respiratory droplets in extremely crowded dining environments should be investigated.In this study,a numerical simulation of coughing at dining tables under two conditions was performed,namely the presence and absence of protective partitions,and the evaporation and condensation of aerosol droplets in the air were examined.By using the numerical method,we analyzed and verified the isolation effect of dining table partitions in the propagation of aerosol droplets.The effect of changes in room temperature on the diffusion of coughed aerosols when partitions were present was analyzed.We demonstrated how respiratory droplets spread through coughing and how these droplets affect others.Finally,we proposed a design for a dining table partition that minimizes the transmission of COVID-19. | M.Zhao C.Zhou T.Chan C.Tu Y.Liu M.Yu | 2022 | Geoscience Frontiers2022，13，6： | 1 |
| 5 | Effects of simulated acid rain on the physiology of carmine spider mite, Tetranychus cinnabarinus (Boisduvals) (Acari: Tetranychidae)显示文摘 | J.‐P.Zhang J.‐J.Wang Z.‐M.Zhao W.Dou Y.Chen | 2004 | Journal of Applied Entomology2004，，5： | 1 |
| 6 | 查看详情显示文摘 | M.Zhao T.Zhou G.R.Chen B.H.Wang | | 0，，： | 1 |
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