Signal compensation of AC MMW radiometer based on DCT and RVM

Aimed at the shortcoming that the loss of low-frequency information of alternating current millimeter-wave radiometer signal, relevance vector machine (RVM) algorithm is used to compensate the lost component in discrete cosine transform (DCT) domain, and through inverse discrete cosine transform (IDCT) we can receive the compensated signal. RVM exploits Bayesian learning framework, which has dramatically fewer kernel functions than comparative support vector machine. So that accurate prediction models can be acquired. Experimental results also show that this method can obtain good compensation effect.

DMI——直流电动机发展过程中的一个新里程碑

ABB电机公司最近推出了一种新型、中等尺寸的直流电动机 ,它在一系列重要领域都具有明显优异的性能。许多以前被认为互相排斥的主要性能现在综合在同一台机器中。DMI新电动机系列使用户可以同时利用大功率、宽速度范围、高转矩、小直径、高过载能力或低转动惯量的优点 ,而不必再放弃任何一种重要性能。这一改进十分重要 ,足以证明DMI开辟了直流电机技术的新纪元。