propagation ratio

Combining the MIMO radar technology and the time reversal technology, the signal-to-noise ratio is improved by tuning the transmitted waveforms to the propagation medium and the target scattering characteristics.

将MIMO雷达技术与时间反转技术结合起来，通过与传播媒介及目标的散射特性相匹配，自适应调整发射波形以提高信噪比。

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In this thesis, considering the random nature of the whole set of data, unified a-N incremental polynomial fitting method is proposed under the same test conditions to provide a scientific basis for the study of the influence of different stress ratio on the fatigue crack propagation.

本论文采用考虑整套数据的随机特性的a-N数据拟合方法，提出统一a-N递增多项式拟合法，为研究不同应力比R下的疲劳断裂可靠性提供科学的依据。

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Finally, based on the result of the feature select, gray ratio, Fourier descriptor and circularity were input to a three-layer Back Propagation ( BP) artificial neural network to distinguish the benign and malignant cases.

最后，在特征选择的基础上，先采用灰度比、似圆度和付里叶描述子作为BP人工神经网络的输入，进行良、恶性肿瘤的识别。

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Differences of sixteen cultivated Cymbidium hybridum orchids in bud propagation ratio were studied.

研究了16种基因型大花蕙兰芽增殖快繁繁殖系数的差异性。

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The sexual propagation of Adenophora tetraphylla is dominantly xenogamous. The seed setting ratio of its autogamy is about 1.2%.

轮叶沙参的有性繁殖主要依靠异花授粉，其自花授粉的结实率为1.2%。

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