赵凹油田安棚主体区Ⅳ2层,自1986年投入开发以来一直是主要生产层,目前已进入特高含水期,为了控制该区块含水上升速度,更有效地提......

A method of B-spline transform for signal feature extraction is developed. With the B-spline, the log-signal space is ma......

<正>Yields in the irrigated rice areas have improved remarkably over the last three decades. Farmers with access to assu......