It also proposes an improved characteristic choice algorithm CD-DF, which introduces the concept of "frequency difference".
3．提出了一种改进的特征选择算法CD-DF。
参考来源 - Internet网页自动分类技术的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
The formulation design, processing characteristic and material choice of winding without filling in epoxy resin cast dry-type transformer are introduced. The warnings in cast process are presented.
介绍了环氧树脂浇注干式变压器无填料绕组浇注的工艺特点、材料的选择和配方设计，提出了浇注过程中应注意的事项。
An author's characteristic way of writing , determined by the choice of words, the arrangement of words in sentences, and the relationship of sentences to one and another.
风格：由词汇的选择，句子中词汇的安排，句子之间的关系形成的某一作家的特定的写作方式。 。
The choice of research methods is the object of study characteristic by the decision.
研究方法的选择是由研究对象的特性决定的。
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