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Study on Purchasing Power Conversion Coefficient at Par
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作者 Zhiping Liu Xiaoxia Wang Daisong Li 《Chinese Business Review》 2005年第1期19-22,共4页
The basic theory of the purchasing power at par refers to the rate of one country's currency to U.S. dollar while purchasing "a basket" goods and services in the same quantity and quality respectively in this count... The basic theory of the purchasing power at par refers to the rate of one country's currency to U.S. dollar while purchasing "a basket" goods and services in the same quantity and quality respectively in this country and U.S.A. This paper gives out calculation method of purchasing power conversion coefficient at par and how to calculate the non-base year purchasing power at par. 展开更多
关键词 the purchasing power at par the purchasing power conversion coefficient at par
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Regulation of Power Conversion in Fuel Cells
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作者 ZHANG J. K. Scott 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2004年第4期466-469,共4页
Here we report a regulation about power conversion in fuel cells. This regulation is expressed as that total power produced by fuel cells is always proportional to the square of the potential difference between the \{... Here we report a regulation about power conversion in fuel cells. This regulation is expressed as that total power produced by fuel cells is always proportional to the square of the potential difference between the \{equilibrium\} potential and work potential. With this regulation we deduced fuel cell performance equation which can describe the potential vs.the current performance curves, namely, polarization curves of fuel cells with three power source parameters: equilibrium potential E_0; internal resistance R; and power conversion coefficient K. The concept of the power conversion coefficient is a new criterion to evaluate and compare the characteristics and capacity of different fuel cells. The calculated values obtained with this equation agree with practical performance of different types of fuel cells. 展开更多
关键词 Fuel cell power conversion coefficient Internal resistance PERFORMANCE POTENTIAL
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