The ionic species in SnCl\-2-1-butylpytidinium chloride (BPC) ambient temperature molten salt electrolytes were investigated by using the computer simulation method. It was found that the Sn electrode potential was ch...The ionic species in SnCl\-2-1-butylpytidinium chloride (BPC) ambient temperature molten salt electrolytes were investigated by using the computer simulation method. It was found that the Sn electrode potential was changed suddenly at 50.0% mole fraction SnCl\-2. The major ionic specie in the 33.3%SnCl\-2 melt is SnCl\+-\-3 and that in the 66.6% SnCl\-2 melt is Sn\-2Cl\+-\-5. Both SnCl\+-\-3 and Sn\-2Cl\+-\-5 existed in the 50.0%SnCl\-2 melt.展开更多
In the recent 20 years,the world service trade is developing at a fantastic speed,with its trade value taking more and more shares from the whole value of the global trade value.In this situation,service trade becomes...In the recent 20 years,the world service trade is developing at a fantastic speed,with its trade value taking more and more shares from the whole value of the global trade value.In this situation,service trade becomes a focus of the countries all over the world.And the developed countries,esp. USA,have changed their attention towards service trade from the goods trade and strengthened the statistics of the international service trade. This article,starting from the U.S. relevant definitions of the statistics on service,made a deep research on its service classification,statistics facilities,statistical process and methodologies on “Selective service trade”, “Specialized service trade” and “Transportation”. In the second part, taking the development of world statistics on service trade as reference,the article made a comment on the US service trade statistics.In the rear part,as a conclusion of this article, what our country can learn from US is talked about.展开更多
文摘The ionic species in SnCl\-2-1-butylpytidinium chloride (BPC) ambient temperature molten salt electrolytes were investigated by using the computer simulation method. It was found that the Sn electrode potential was changed suddenly at 50.0% mole fraction SnCl\-2. The major ionic specie in the 33.3%SnCl\-2 melt is SnCl\+-\-3 and that in the 66.6% SnCl\-2 melt is Sn\-2Cl\+-\-5. Both SnCl\+-\-3 and Sn\-2Cl\+-\-5 existed in the 50.0%SnCl\-2 melt.
文摘In the recent 20 years,the world service trade is developing at a fantastic speed,with its trade value taking more and more shares from the whole value of the global trade value.In this situation,service trade becomes a focus of the countries all over the world.And the developed countries,esp. USA,have changed their attention towards service trade from the goods trade and strengthened the statistics of the international service trade. This article,starting from the U.S. relevant definitions of the statistics on service,made a deep research on its service classification,statistics facilities,statistical process and methodologies on “Selective service trade”, “Specialized service trade” and “Transportation”. In the second part, taking the development of world statistics on service trade as reference,the article made a comment on the US service trade statistics.In the rear part,as a conclusion of this article, what our country can learn from US is talked about.