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自冠状动脉旁路移植手术问世以来,移植血管材料的选择一直是领域内最具争议性的话题之一,其中动脉桥血管由于优良的生物学特性和高通畅率受到广泛关注。近年来,我国动脉桥及全动脉桥应用比例有所提高,但与欧美国家仍有一定差距。既往多项临床研究肯定了全动脉桥在桥通畅率和远期预后方面的优势,但这一结论仍有待高质量随机对照临床试验验证。本文综述全动脉桥冠状动脉旁路移植术的临床应用现状与策略,为后续临床研究和诊疗提供参考。

The Inverse Classification Problem

In this paper, we examine an emerging variation of the classification problem, which is known as the inverse classification problem. In this problem, we determine the features to be used to create a record which will result in a desired class label. Such an approach is useful in applications in which it is an objective to determine a set of actions to be taken in order to guide the data mining application towards a desired solution. This system can be used for a variety of decision support applications which have pre-determined task criteria. We will show that the inverse classification problem is a powerful and general model which encompasses a number of different criteria. We propose a number of algorithms for the inverse classification problem, which use an inverted list representation for intermediate data structure representation and classification. We validate our approach over a number of real datasets.