二元分类(dual or dualistic classification),又称“二向分类”。在包含两类事项的比较研究中,按两个标志所作的分类。例如在研究学生的智力与性别的关系时,按智力与性别两个标志分类,即为二元分类。对于二元分类的观测结果,需要根据数据的特征,考虑采用 x2 检验或二元分类的方差分析。
当构建一个二元分类器时,很多实践者会立即跳转到逻辑回归,因为它很简单。
When building a binary classifier, many practitioners immediately jump to logistic regression because it's simple.
在第一阶段先进行二元分类,判别一个句法成分是否为语义角色,然后对第一阶段中的语义角色再进行多元分类,给其分配具体的语义角色。
In the first phase, we carried out the dual classification, determine whether a syntactic component is a semantic role, then do multi-classification to assign a specific semantic role.
以思维的对象为分类依据,思维可以分为一元思维、二元思维和多元思维。
Taking the objects which the thinking concerned as the basis of classification, the thinking can be divided into unified thinking, binary thinking and multi-thinking.
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