<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
<正>This paper mainly describes a research of fabrication-technology of silicon magnetic-sensitive transistor (SMST) with rectangle-plank-cubic structure fabric