With the economic development, the environment protection problems become more and more serious and the environment protection deterioration risk has been exacerbated in Zibo City, China. Many small heating boilers are used to supply heat in Huantai district of Zibo, which have low efficiency of...

A well-known regulation on the management of a closed-end mutual fund is that the managers’ account cannot invest in risky assets. This paper studies the impact of this regulation under a given management fee structure such that the cumulative management fee rate is described by a fixed RCLL...

Mg–Al hydrotalcite-like compound (HTlc) and ethylenediaminetetraacetate (EDTA)-modified HTlc (EDTA-HTlc) were prepared through coprecipitation and ion exchange, respectively. A crosslinking composite CS-EDTA-HTlc surrounded by highly crosslinked chitosan (CS) on the EDTA-HTlc was then...