An analytical method, using sector field inductively coupled plasma mass spectrometry （SF-ICP-MS） for rapid simultaneous determination of Be, Na, Mg, Si, Ca, Ti, V, Cr, Fe, Co, Ni, Cu, Zn, As, Sn, Sb, Pb and Bi in e...An analytical method, using sector field inductively coupled plasma mass spectrometry （SF-ICP-MS） for rapid simultaneous determination of Be, Na, Mg, Si, Ca, Ti, V, Cr, Fe, Co, Ni, Cu, Zn, As, Sn, Sb, Pb and Bi in electrolytic manganese metal, was described. At the beginning, the samples were decomposed by HNO3 and H2504, and then analyzed by SF-ICP-MS. Most of the spectral interferences could be avoided by measuring in different mass resolution modes. The matrix effects due to the excess of sulfuric acid and Mn were evaluated. Correction of matrix effects was conducted by using the internal standard elements. The optimum condition for the determination was investigated and discussed. The detection limit is in the range of 0.001-0.169 gg/L. The current method is applied to the determination of trace impurities in electrolytic manganese metal. And experiments show that good results can be obtained much faster, more accurately and conveniently by current method.展开更多
In the process of industrialization, China has been a big agricultural country, and the agricultural sector＇s economic activities have been playing important role in economic growth. This paper established the invest...In the process of industrialization, China has been a big agricultural country, and the agricultural sector＇s economic activities have been playing important role in economic growth. This paper established the investment behavior model of agricultural enterprises on the basis of Chinese practice. And then, the model presented the important factors impacting on investment, such as financing cost, wage, and policy factors, etc. Thirdly, this paper in particular used R-studio to estimate the impact of fmancing cost and policy factor on investment and capital accumulation of primary industry sector by gathering the data from 2003 to 2013. The results showed that the official interest rate of loans of financial institutions could be the proxy variable as the financing cost of agricultural enterprises, and the employment level of agricultural enterprises had negative impact on investment. Finally, this paper provided some explanations and suggestions on the basis of above results.展开更多
The exact and approximate expressions for the field components of the TE modes in a sectoral waveguide are presented. Using the equivalence principle, the electric field distribution on the aperture surfaces of a narr...The exact and approximate expressions for the field components of the TE modes in a sectoral waveguide are presented. Using the equivalence principle, the electric field distribution on the aperture surfaces of a narrow transverse slot cut in the curved broad wall of a sectoral waveguide is solved by the moment method (Galerkin's method). lmportant results such as the scattering parameter, the normalized equivalent series impedance, the resonant resistance and resonant length are studied.展开更多
National Association for Hydrogen Energy (NAHE) was established in 2003 to facilitate the effective integration of the Russian Federation into the world hydrogen economy. The priority for the Association is to create ...National Association for Hydrogen Energy (NAHE) was established in 2003 to facilitate the effective integration of the Russian Federation into the world hydrogen economy. The priority for the Association is to create legislation and basic standards which necessary for the successful development of hydrogen energy, promote this sector to a large public and to support the development of those priority areas, where Russia has the best prospects to take a rightful place in the international division of labour (atomic hydrogen energy, fuel cells, hydrogen vehicles). Hydrogen Energy, National Association for Hydrogen Energy By now the Association has developed a draft technical regulation on security devices and systems展开更多
It is predicted that in the near future,private- sector standard will,like Tesco,Wal- Mart,Carrefour,still exit. China should modify its current legal regal disciplines' to make the private entities with regards f...It is predicted that in the near future,private- sector standard will,like Tesco,Wal- Mart,Carrefour,still exit. China should modify its current legal regal disciplines' to make the private entities with regards food safety. Probably the mechanism of government-private entities collaboration governance would be a best choice.展开更多
基金Project(21075138)supported by the National Natural Science Foundation of ChinaProject(cstc2013jcyjA10088)supported by Chongqing Natural Science Foundation,ChinaProject(KJ121311)supported by Scientific and Technological Research Program of Chongqing Municipal Education Commission,China
文摘An analytical method, using sector field inductively coupled plasma mass spectrometry （SF-ICP-MS） for rapid simultaneous determination of Be, Na, Mg, Si, Ca, Ti, V, Cr, Fe, Co, Ni, Cu, Zn, As, Sn, Sb, Pb and Bi in electrolytic manganese metal, was described. At the beginning, the samples were decomposed by HNO3 and H2504, and then analyzed by SF-ICP-MS. Most of the spectral interferences could be avoided by measuring in different mass resolution modes. The matrix effects due to the excess of sulfuric acid and Mn were evaluated. Correction of matrix effects was conducted by using the internal standard elements. The optimum condition for the determination was investigated and discussed. The detection limit is in the range of 0.001-0.169 gg/L. The current method is applied to the determination of trace impurities in electrolytic manganese metal. And experiments show that good results can be obtained much faster, more accurately and conveniently by current method.
文摘In the process of industrialization, China has been a big agricultural country, and the agricultural sector＇s economic activities have been playing important role in economic growth. This paper established the investment behavior model of agricultural enterprises on the basis of Chinese practice. And then, the model presented the important factors impacting on investment, such as financing cost, wage, and policy factors, etc. Thirdly, this paper in particular used R-studio to estimate the impact of fmancing cost and policy factor on investment and capital accumulation of primary industry sector by gathering the data from 2003 to 2013. The results showed that the official interest rate of loans of financial institutions could be the proxy variable as the financing cost of agricultural enterprises, and the employment level of agricultural enterprises had negative impact on investment. Finally, this paper provided some explanations and suggestions on the basis of above results.
文摘The exact and approximate expressions for the field components of the TE modes in a sectoral waveguide are presented. Using the equivalence principle, the electric field distribution on the aperture surfaces of a narrow transverse slot cut in the curved broad wall of a sectoral waveguide is solved by the moment method (Galerkin's method). lmportant results such as the scattering parameter, the normalized equivalent series impedance, the resonant resistance and resonant length are studied.
文摘National Association for Hydrogen Energy (NAHE) was established in 2003 to facilitate the effective integration of the Russian Federation into the world hydrogen economy. The priority for the Association is to create legislation and basic standards which necessary for the successful development of hydrogen energy, promote this sector to a large public and to support the development of those priority areas, where Russia has the best prospects to take a rightful place in the international division of labour (atomic hydrogen energy, fuel cells, hydrogen vehicles). Hydrogen Energy, National Association for Hydrogen Energy By now the Association has developed a draft technical regulation on security devices and systems
文摘It is predicted that in the near future,private- sector standard will,like Tesco,Wal- Mart,Carrefour,still exit. China should modify its current legal regal disciplines' to make the private entities with regards food safety. Probably the mechanism of government-private entities collaboration governance would be a best choice.
