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Bond graphs are multi-energy domain (e.g. mechanical, electrical, hydraulic, etc.) and domain neutral. This means a bond graph can incorporate multiple domains seamlessly. The bond graph is composed of the "bonds" which link together "single-port", "double-port" and "multi-port" elements (see below for details).
A simple mass–spring–damper system, and its equivalent bond-graph form. Bond graphs are a unique way of describing dynamic models, designed to model the interaction between different kinds of physical systems, like electrical, mechanical, hydraulical and chemical. This is possible because one thing all these components have in common is power.
A hybrid bond graph is a graphical description of a physical dynamic system with discontinuities (i.e., a hybrid dynamical system). Similar to a regular bond graph, it is an energy-based technique. However, it allows instantaneous switching of the junction structure, which may violate the principle of continuity of power (Mosterman and Biswas ...
In graph theory, a dipole graph, dipole, bond graph, or linkage, is a multigraph consisting of two vertices connected with a number of parallel edges. A dipole graph containing n edges is called the size-n dipole graph, and is denoted by D n. The size-n dipole graph is dual to the cycle graph C n.
Thus the bond graph separates the structure (a relationship between current and voltage that leads to a dissipation of energy) from the causality (assignment of input and output). In a more complex system, you can define the relationships between all the components without having to worry about which variables might be inputs and which outputs.
The graph attention network (GAT) was introduced by Petar Veličković et al. in 2018. [11] Graph attention network is a combination of a GNN and an attention layer. The implementation of attention layer in graphical neural networks helps provide attention or focus to the important information from the data instead of focusing on the whole data.
Simple-RC-Circuit-bond-graph-4.png (563 × 377 pixels, file size: 5 KB, MIME type: image/png) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
Bond-graph-parallel-power-example.png (405 × 395 pixels, file size: 4 KB, MIME type: image/png) This is a file from the Wikimedia Commons . Information from its description page there is shown below.