The paper analyzed the some main phenomenon of unbalance voltage output in non-ground neutral system of 10kV distributing network and the reasons of troubles under the conditions,which has a significance in estimating correctly the trouble s reasons,rapidly handling them,promoting the reliability and quality of power supply and economy benefit.

Study on non-equilibrium sediment transport in the sandy river erosion;

In consideration of the characteristics of wind waves,water flow,topography,and sediment in this area,formulas for calculation of the sudden deposition in the waterway were derived from the non-equilibrium sediment transport equations for suspended loads,and the main parameters were determined by numerical simulation of tides and field data.

Based on the characteristics of flow, topography and sediment of the sea area where Yamen waterway is located, the formula for assessment of the waterway s sediment deposition is derived from the equation of non-equilibrium sediment transport of suspended material.

Previous investigations of non equilibrium and equilibrium sediment transport are analyzed and a two dimensional mathematical model of non equilibrium sediment transport in river channels with non uniform bed material is presented.

Study on non-equilibrium transport of suspended material in unsteady flow;