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Quartz optical fibers are of great significance in many fields. For example,they can be used to fabricate strain sensors and temperature sensors.If the surface of optical fibers is metal-coated by… (More)
In this paper,the disadvantage is analysed for analogue modulation system is adopted in Pingdingshan Coal Industry(Group) Co.Ltd.13th Colliery assistant mine hoisting winch electrical control… (More)
Amorphous Fe 2O 3 colloid was prepared by the forced hydrolysis method and its films were fabricated on ITO electrodes by dropping technique. The photoelectrochemical properies of ITO/Fe 2O 3… (More)
This paper introduces the conception and the use of transfer pricing,and introduces how to transfer price. It analyses that the engineering group corporation how to transfer price about income tax .… (More)
A new programmable Josephson voltage standard (PJVS) at 1 V level was developed at National Institute of Metrology (NIM), China. This system is able to generate dc voltage and stepwise-approximated… (More)