As for the choice of the microwave irradiation frequency, the trade-off must be made in order to insure the penetration depth of the microwave signal, imaging contrast and signal-to-noise ratio.
为了同时兼顾穿透深度、成像对比度和信噪比三方面的需要，选择微波辐照频率时应该采取折中选取的原则。
By the analysis penetration of ZnOw into the compound board will compose a microscopic damping structure, which can reduce the vibration frequency and increase the damping ratio.
分析认为，氧化锌晶须渗入在复材中将形成微观的阻尼结构，起到降低固有振动频率和增大衰减率的作用。
Manipulate frequency, the maximal stenosis and horizontal penetration parameter are the important parameters of the rolling massage in Chinese traditional medical massage.
手法频率，血管最大狭窄度和作用力水平渗透系数，是中医扌衮法推拿的重要参数。
As compared with CK (var. African E40) , the density of hairiness reduced the feeding time E2, and increased the 1st non-feeding time and penetration frequency.
与CK非洲E40相比，多毛可以显著降低棉蚜的取食周期E2，并可显著延长第1非取食周期和增加蚜虫口针的刺探频率。
In basis of analyzing the features of the conventional arc welding technology, a DC low-frequency plasma welding power with fusion penetration is selected as the heat source for metal forming.
本课题在分析常规弧焊技术特点的基础上，选取熔透式低频直流等离子弧焊电源作为成形的热源。
High-frequency arc initiation and strong welding penetration. Beautiful and smooth welding surface.
高频引弧，焊接渗透力强，焊接表面均匀美观。
Apply high frequency to generate arc with high voltage, outstanding arc generating Performance, high welding penetration.
采用高频增压引弧，引弧性能好，焊接渗透力强。
Low penetration as well as drilling incidents of high frequency resulted from problems caused by leakage, gas migration, collapsing sticking, well kick, blowout and so forth.
且常发生井漏、气侵、坍塌性卡钻、井涌与井喷等井下复杂问题，导致机械钻速低与钻井事故频发。
Low penetration as well as drilling incidents of high frequency resulted from problems caused by leakage, gas migration, collapsing sticking, well kick, blowout and so forth.
且常发生井漏、气侵、坍塌性卡钻、井涌与井喷等井下复杂问题，导致机械钻速低与钻井事故频发。
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