Ecotoxic effects of antibiotics or ammonium have been confirmed independently in aquatic animals,but few studies have investigated their combined effects.In aqu
The impoundment of the Three Gorges Dam (TGD) has altered downstream hydrological characteristics and sediment discharge,and it has caused ecological impacts,su
In this study,a mathematical model of multipath channels is established,and the delay parameters of 10-path models are calculated at 300m.A multipath-channel ha