Despite recent advances in population-based structural health monitoring (PBSHM), knowledge transfer between highly-disparate structures (i.e., heterogeneous populations) remains a challenge. It has been proposed that heterogeneous transfer may be accomplished via intermediate structures that bridge the gap in information between the structures of interest. A key aspect of the technique is the idea that by varying parameters such as material properties and geometry, one structure can be continuously morphed into another. The current work demonstrates the development of these interpolating structures, via case studies involving the parameterisation of (and transfer between) a simple, simulated 'bridge' and 'aeroplane'. The facetious question 'When is a bridge not an aeroplane?' has been previously asked in the context of predicting positive transfer based on structural similarity. While the obvious answer to this question is 'Always,' the current work demonstrates that in some cases positive transfer can be achieved between highly-disparate systems.

本研究解决了人口基础结构健康监测（PBSHM）中高度异质结构之间知识传递的挑战。通过建议使用中介结构在目标结构之间架起信息的桥梁，研究展示了通过参数化的案例研究，如何在简单的“桥”和“飞机”之间实现结构间的变化。重要发现表明，在某些情况下，可以在高度异质的系统之间实现有效的知识转移。

桥何时变成飞机？