<正>In this paper we put forward a new concept about effective trapping center concentration N~e_T which is decreasing with the trapped charge Q corresponding t
<正>Acoustic telemetry along the drill string helps to know the physical and chemical characteristics of the formation and drilling fluid.A time-domain algorith
<正>An analysis of the sensitive mechanism of silicon micromachined gas pendulum tilt sense organ is made.Adopting the method of FEA (finite element analysis),t