Structural complexities of knowledge-guided symbolic regression models for melt conveying in single-screw extruders

Excel spreadsheet with numeric values and textual description.Contains the expression tree lengths and depths of symbolic regression models for the dimensionless melt flow rate in single-screw extruders with different cases of integrated domain knowledge: Case 1: theory of similarity only, Case 2: additional derived input features for pure pressure flow, Case 3: logarithmic scaling of the dimensionless flow rate with channel aspect ratio as derived input feature, Case 4: theoretical approximation equation for superimposed drag and pressure flow in dimensionless space.本数据集为包含数值与文本描述的Excel电子表格，收录了不同融合领域知识场景中，单螺杆挤出机无量纲熔体流动速率的符号回归（symbolic regression）模型的表达式树长度与深度，具体涵盖四类案例： 案例1：仅采用相似理论； 案例2：新增针对纯压力流的派生输入特征； 案例3：以通道宽高比作为派生输入特征，对无量纲流动速率进行对数缩放； 案例4：无量纲空间内拖曳流与压力流叠加的理论近似方程。