Friction stir welding （FSW）, invented at The Welding Institute, UK, in 1991, is a highly efficient solid-state joining technique, involving frictional and adiabatic heating, plastic deformation and solid-state diffu...Friction stir welding （FSW）, invented at The Welding Institute, UK, in 1991, is a highly efficient solid-state joining technique, involving frictional and adiabatic heating, plastic deformation and solid-state diffusion. It has been widely accepted as a ＂green＂ technology due to its energy efficiency and environment friendliness, and is considered the most significant development in the field of material joining over the past two decades. Friction stir processing （FSP） was later developed based on the basic principles of FSW. FSP has proven to be an effective and versatile metalworking technique for modifying and fabricating metallic materials.展开更多
W25 was a gamma-irradiation induced albinorice mutant line, which only expressed in thespecial temperatures (see figure). At 30 Cand 35 C, the seedling leaves of W25 showedgreenish or normal green, but they exhibiteda...W25 was a gamma-irradiation induced albinorice mutant line, which only expressed in thespecial temperatures (see figure). At 30 Cand 35 C, the seedling leaves of W25 showedgreenish or normal green, but they exhibitedalbino at 25℃, which could be greenish afterthe fourth leaf extension and recovered to be展开更多
We will highlight the values Umicore's unique Process Excellence Model is based upon and how these do correlate with the overall culture of Umicore. Besides, we are going to explain about the benefits for the targ...We will highlight the values Umicore's unique Process Excellence Model is based upon and how these do correlate with the overall culture of Umicore. Besides, we are going to explain about the benefits for the target industries that come along with our approach. Here, we will not mainly focus on the usually mentioned cost saving potential, but how also other aspects do create substantial value for the industries.展开更多
Three special types of xenoliths have recently been found in an aegirine-augite syenite porphyry in Liuhe, Yunnan, China. Petrographical, petrochemical, electron microprobe, and scanning electron microscopy studies in...Three special types of xenoliths have recently been found in an aegirine-augite syenite porphyry in Liuhe, Yunnan, China. Petrographical, petrochemical, electron microprobe, and scanning electron microscopy studies indicate that pure calcite xenocrysts and quartz-bearing topaz pegmatite xenoliths result from the degassing of mantle fluids during their migration, and that black microcrystalline iron-rich silicate-melt xenoliths are the product of the extraction of mantle fluids accompanying degassing and are composed dominantly of quartz, chlorite, and iron-rich columnar and sheet silicate minerals with characteristic minerals, such as native iron, apatite, and zircon. According to the bulk-rock chemical and mineral compositions and crystallization states, the microcrystalline melt xenoliths are not the product of conventional magmatism, and especially the existence of native iron further proves that the xenoliths were mantle fluid materials under reduction or anoxic conditions. The study of the special xenoliths furnishes an important deep-process geochemical background of polymetallic mineralization in different rocks and strata in the study area.展开更多
Special economic zones(SEZs)help provide the momentum for China’s economic growth.This paper studies the influence of SEZs on enterprise’s export structures from the perspective of production complexity using data f...Special economic zones(SEZs)help provide the momentum for China’s economic growth.This paper studies the influence of SEZs on enterprise’s export structures from the perspective of production complexity using data from the China Industry Business Performance Database(CIBPD)collected between 2000 and 2007.We found that enterprises in SEZs have a higher export propensity and volume due to more complexity.Also,enterprises with more complexity outside SEZs show a higher export propensity and volume depending on the number of SEZs near them and the radiation effect of the SEZs.Similarly,high and new-tech industrial development zones perform more prominently in this regard.展开更多
文摘Friction stir welding （FSW）, invented at The Welding Institute, UK, in 1991, is a highly efficient solid-state joining technique, involving frictional and adiabatic heating, plastic deformation and solid-state diffusion. It has been widely accepted as a ＂green＂ technology due to its energy efficiency and environment friendliness, and is considered the most significant development in the field of material joining over the past two decades. Friction stir processing （FSP） was later developed based on the basic principles of FSW. FSP has proven to be an effective and versatile metalworking technique for modifying and fabricating metallic materials.
文摘W25 was a gamma-irradiation induced albinorice mutant line, which only expressed in thespecial temperatures (see figure). At 30 Cand 35 C, the seedling leaves of W25 showedgreenish or normal green, but they exhibitedalbino at 25℃, which could be greenish afterthe fourth leaf extension and recovered to be
文摘We will highlight the values Umicore's unique Process Excellence Model is based upon and how these do correlate with the overall culture of Umicore. Besides, we are going to explain about the benefits for the target industries that come along with our approach. Here, we will not mainly focus on the usually mentioned cost saving potential, but how also other aspects do create substantial value for the industries.
基金supported by National Natural Science Foundation of China grant 40473027 and 40773031Foundation of Open Subjects of the State Key Laboratory of Geological Processes and Mineral Resources of the China University of Geosciences grant GPMR0509 and GPMR200705the Project of the State Key(Preparation Support)Disciplines of Mineralogy,Petrology and Mineral Deposit Geology of Sichuan Province.
文摘Three special types of xenoliths have recently been found in an aegirine-augite syenite porphyry in Liuhe, Yunnan, China. Petrographical, petrochemical, electron microprobe, and scanning electron microscopy studies indicate that pure calcite xenocrysts and quartz-bearing topaz pegmatite xenoliths result from the degassing of mantle fluids during their migration, and that black microcrystalline iron-rich silicate-melt xenoliths are the product of the extraction of mantle fluids accompanying degassing and are composed dominantly of quartz, chlorite, and iron-rich columnar and sheet silicate minerals with characteristic minerals, such as native iron, apatite, and zircon. According to the bulk-rock chemical and mineral compositions and crystallization states, the microcrystalline melt xenoliths are not the product of conventional magmatism, and especially the existence of native iron further proves that the xenoliths were mantle fluid materials under reduction or anoxic conditions. The study of the special xenoliths furnishes an important deep-process geochemical background of polymetallic mineralization in different rocks and strata in the study area.
基金a staged result of “Statistical Monitoring and Evaluation Research on China’s New Economy and Growth Drivers in the Context of Big Data”(Approved under No.18ZDA124),a key program sponsored by the National Social Science Fund of China
文摘Special economic zones(SEZs)help provide the momentum for China’s economic growth.This paper studies the influence of SEZs on enterprise’s export structures from the perspective of production complexity using data from the China Industry Business Performance Database(CIBPD)collected between 2000 and 2007.We found that enterprises in SEZs have a higher export propensity and volume due to more complexity.Also,enterprises with more complexity outside SEZs show a higher export propensity and volume depending on the number of SEZs near them and the radiation effect of the SEZs.Similarly,high and new-tech industrial development zones perform more prominently in this regard.
