符号学习 meaning in English

sign learning

Sign learning theory
符号学习理论
After that until now , the research on machine learning achieved greatly , and was mainly characterized as bobbing up like a cork of algorithmic of connection learning , increasing perfected of symbol learning ; ( 2 ) the relationship between the encoding subgoal of worked example and learning
第四阶段是从20世纪80年代初开始到现在。机器学习取得了突飞猛进的成就，其特点是：连接学习算法东山再起，符号学习日臻完善。
There are some limitations for solving these problems by the expert system ( es ) based on the symbol study and inference . therefore , some numerical value analysis methods are researched . for example artificial neural network ( ann ) and fuzzy recognition technique ( frt )
基于符号学习和推理的专家系统在解决这个问题上的某些局限性，使基于数值计算的诊断方法，如人工神经网络和模糊识别等，成为智能故障诊断研究的新课题。