开展植被固碳释氧服务生态效益评估,是落实“两山”理念和实现“双碳”目标的需要。本研究采用遥感产品对2001-2022年广东省陆域植被固碳释氧服务时空动态进行了分析,得到以下结论:(1)南岭区和粤中区多年平均固碳量维持在1000 g C m-2 ...开展植被固碳释氧服务生态效益评估,是落实“两山”理念和实现“双碳”目标的需要。本研究采用遥感产品对2001-2022年广东省陆域植被固碳释氧服务时空动态进行了分析,得到以下结论:(1)南岭区和粤中区多年平均固碳量维持在1000 g C m-2 a-1以上,为全省贡献了80.78%的固碳释氧服务;(2)珠三角区区以农业与都市经济为主导功能,固碳释氧服务能力在各生态区最低,依赖周边的南岭区和粤中区服务供给;(3)广东省植被固碳释氧服务以每年15.81万吨固碳量、42.21万吨释氧量和6.12 亿元固碳释氧价值的增长速率增长。本研究揭示生态保护修复对植被恢复起到了良好的促进作用,提升了广东省植被固碳释氧服务功能。展开更多
Substrate straining test was carried out to study the buckling pattern of TiO2 nanotube film. The results show that the tensile strains of buckling occurrence of TiO2 nanotube films without annealing, with 250 ℃ anne...Substrate straining test was carried out to study the buckling pattern of TiO2 nanotube film. The results show that the tensile strains of buckling occurrence of TiO2 nanotube films without annealing, with 250 ℃ annealing and with 400 ℃ annealing are 2.5%, 8.9% and 7.8%, respectively, which indicates the modifying effects of temperature annealing. Through the SEM observation, the critical buckling stresses of TiO2 nanotube films without annealing, with 250 ℃ annealing and with 400 ℃ annealing can be estimated as 180.4, 410.2 and 619.5 MPa, respectively. The critical buckling stress of TiO2 nanotube films with 250 ℃ annealing from AFM observation is estimated as 470.2 MPa, which indicates good agreement with the critical buckling stress from SEM observation. The true stress and the critical energy release rate of TiO2 nanotube film with 250 ℃ annealing are given as 840.3 MPa and 77.2 J/m2, respectively. Excellent agreement of the critical energy release rate of TiO2 nanotube film with 250 ℃ annealing in terms of buckling perspective and crack perspective is obtained.展开更多
文摘开展植被固碳释氧服务生态效益评估,是落实“两山”理念和实现“双碳”目标的需要。本研究采用遥感产品对2001-2022年广东省陆域植被固碳释氧服务时空动态进行了分析,得到以下结论:(1)南岭区和粤中区多年平均固碳量维持在1000 g C m-2 a-1以上,为全省贡献了80.78%的固碳释氧服务;(2)珠三角区区以农业与都市经济为主导功能,固碳释氧服务能力在各生态区最低,依赖周边的南岭区和粤中区服务供给;(3)广东省植被固碳释氧服务以每年15.81万吨固碳量、42.21万吨释氧量和6.12 亿元固碳释氧价值的增长速率增长。本研究揭示生态保护修复对植被恢复起到了良好的促进作用,提升了广东省植被固碳释氧服务功能。
基金Project (51274248) supported by the National Natural Science Foundation of ChinaProject (20110946Z) supported by State Key Laboratory of Powder Metallurgy, China
文摘Substrate straining test was carried out to study the buckling pattern of TiO2 nanotube film. The results show that the tensile strains of buckling occurrence of TiO2 nanotube films without annealing, with 250 ℃ annealing and with 400 ℃ annealing are 2.5%, 8.9% and 7.8%, respectively, which indicates the modifying effects of temperature annealing. Through the SEM observation, the critical buckling stresses of TiO2 nanotube films without annealing, with 250 ℃ annealing and with 400 ℃ annealing can be estimated as 180.4, 410.2 and 619.5 MPa, respectively. The critical buckling stress of TiO2 nanotube films with 250 ℃ annealing from AFM observation is estimated as 470.2 MPa, which indicates good agreement with the critical buckling stress from SEM observation. The true stress and the critical energy release rate of TiO2 nanotube film with 250 ℃ annealing are given as 840.3 MPa and 77.2 J/m2, respectively. Excellent agreement of the critical energy release rate of TiO2 nanotube film with 250 ℃ annealing in terms of buckling perspective and crack perspective is obtained.