Lastly, The jamming effectiveness is emphatically analyzed in the presence of bit error, bit width error and carrier frequency error. 最后分析了干扰信号在存在误码、元宽度误差以及载频误差情况下的干扰效果。
So iron left to own devices in the atmosphere in the presence of a little bit of water, with the water form iron oxide. 铁在大气中,在存在,少量水的条件下,大气会开始与水结合产生氧化铁。
Knowing the presence and concentration of oil and gas in drilling fluids provides an indication of the formation confronted by the drill bit and a basis for determining the feasibility of obtaining oil and gas from the well. 获知钻井液中油气组分的存在及浓度就提供了钻头所在地层的证据,同时也提供了从油井中获取的油气可行性的基础。