Table 1.
The on-chain data in ExplorerChain
| Field name | Description | Possible values |
|---|---|---|
| Model mean | The mean vector of the EXPLORER model.4 | A numerical vector with length equal to m+1. |
| Model covariance | The covariance matrix of the EXPLORER model.4 | A numerical (m+1) × (m+1) square symmetric matrix. |
| Flag | The type of action performed by a site. | UNKNOWN, INITIALIZE, UPDATE, EVALUATE, TRANSFER, CONSENSUS, TEST, CLEAR. |
| Error | The training error. | A numerical value between 0 and 1. |
| From site | The site that has submitted the model. | A unique name or identifier representing the sender site. |
| To site | The site that will receive the model. | A unique name or identifier representing the receiver site. |
| Time | The time that the site submitted the model. | A timestamp. |
| Iteration | The current iteration of the cross-institutional model learning process. | A non-negative integer. |
The EXPLORER model contains both the mean coefficient vector and the covariance matrix.4 Also, m is the number of features in the dataset.