未来飞机推进系统要求压气机的压比和效率均大大高于目前的使用水平，以提高发动机推重比，减小燃油消耗。
For improve thrust loading and decrease fuel consume of the engine, propulsive system of the future demand the compressor in possession of higher pressure ratio and more efficiency.
仿真结果表明，与削波技术和传统的压扩技术相比，门限压扩以较小的系统复杂度获得了峰均比性能的改善。
Simulation results show that compared with clipping and the traditional companding techniques, threshold-based companding scheme can effectively improve the performance of PAPR with low complexity.
建议对注水系统的注水井、管网、注水站均进行改造，综合调整，降低井口压差。
The injection Wells, pipe network and injection plant in the injection system should be reformed and adjusted and made differential pressure at well head reduce.
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