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A novel adsorbent, tartaric acid modified graphene oxide (GO-TA), was successfully prepared by a simple esterification reaction and applied to remove Cu(II) and Pb(II) metal ions from aqueous solutions. The obtained composites were characterized by Fourier transform infrared (FT-IR) spectroscopy, Raman spectroscopy and transmission electron microscopy (TEM). Batch experiments were carried out to investigate...
There exist various types of firms all over the world and different types of firms give rise to different decisions in economic field. It is therefore extremely important to investigate the forms of the business in detail. In this paper, two typical businesses, corporations with individual decisions (CIDs) and corporations with multi-person decisions (CMDs), are characterized and the efficiencies...
Rapid changes in the social and technical environment bring about many new challenges to system requirements engineering, amongst which out-sourcing or off-shoring of certain design tasks to countries with more human resources and broader markets becomes promising business leverage. This paper reports the results from a survey of requirements practices in China and points out their implications. The...
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