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Xisheng Hu,Chengzhen Wu,Wei Hong,Rongzu Qiu,Xinhua Qi 한국지질과학협의회 2013 Geosciences Journal Vol.17 No.4
In this paper, substitution cost methods and prevention cost methods were used to estimate the influence of construction land on the ecosystem service value (ESV). Then, the total ESV was adjusted by the influence. The results showed that the ESV of Fuzhou City dropped from 105, 061.53 million Yuan in 1986 to 103, 916.53 million Yuan in 2006, mainly due to the degradation of cropland and water body and the increase of construction land. Water supply and waste treatment were the two largest ecosystem services, contributing approximately 35% of the total ecosystem service in both years. On the basis of land-use transition matrix, the compartment theory was applied to simulating landuse spatial pattern dynamics under different artificial intervention scenarios. The results showed that if we maintain or increase the existing intensity of interference, the total ESV of Fuzhou City will decrease by 58.13 million Yuan per year or 122.99 million Yuan per year, respectively; if we reduce the existing intensity of interference,the total ESV will increase by 52.38 million Yuan per year. In addition, the total ESV will decrease by 4.84 million Yuan for each 10% increase in the speed of the urbanisation process. We can conclude that the disordered expansion of construction lands and imbalance of ecological lands are main problems impeding the harmonious urban development. Given the similar social environment across the Chinese mainland, the findings from our study have important implications for the sustainable development of other rising cities in China and beyond.
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Non-isothermal Decomposition Kinetics of a New High-energy Organic Potassium Salt: K(DNDZ)
Kangzhen Xu,Xiaolei Ren,Fengqi Zhao,Hongxu Gao,Siyu Xu,Rongzu Hu,Jirong Song 대한화학회 2009 Bulletin of the Korean Chemical Society Vol.30 No.10
A new high-energy organic potassium salt, 2-(dinitromethylene)-1,3-diazepentane potassium salt K(DNDZ), was synthesized by reacting of 2-(dinitromethylene)-1,3-diazepentane (DNDZ) and potassium hydroxide. The thermal behavior and non-isothermal decomposition kinetics of K(DNDZ) were studied with DSC, TG/DTG methods. The kinetic equation is d 1013.92 3(1 ) dT ααβ= −2[−ln(1 − α )]3 exp(−1.52 × 105 / RT). The critical temperature of thermal explosion of K(DNDZ) is 208.63 oC. The specific heat capacity of K(DNDZ) was determined with a micro-DSC method, and the molar heat capacity is 224.63 J mol‒1 K‒1 at 298.15 K. Adiabatic time-to-explosion of K(DNDZ) obtained is 157.96 s.
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Non-isothermal Decomposition Kinetics of a New High-energy Organic Potassium Salt: K(DNDZ)
Xu, Kangzhen,Zhao, Fengqi,Song, Jirong,Ren, Xiaolei,Gao, Hongxu,Xu, Siyu,Hu, Rongzu Korean Chemical Society 2009 Bulletin of the Korean Chemical Society Vol.30 No.10
A new high-energy organic potassium salt, 2-(dinitromethylene)-1,3-diazepentane potassium salt K(DNDZ), was synthesized by reacting of 2-(dinitromethylene)-1,3-diazepentane (DNDZ) and potassium hydroxide. The thermal behavior and non-isothermal decomposition kinetics of K(DNDZ) were studied with DSC, TG/DTG methods. The kinetic equation is $\frac{d{\alpha}}{dT}$ = $\frac{10^{13.92}}{\beta}$3(1 - $\alpha$[-ln(1 - $\alpha$)]$^{\frac{2}{3}}$ exp(-1.52 ${\times}\;10^5$ / RT). The critical temperature of thermal explosion of K(DNDZ) is $208.63\;{^{\circ}C}$. The specific heat capacity of K(DNDZ) was determined with a micro-DSC method, and the molar heat capacity is 224.63 J $mol^{-1}\;K^{-1}$ at 298.15 K. Adiabatic time-to-explosion of K(DNDZ) obtained is 157.96 s.
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