2results about How to "Reduce communication cost" patented technology

This invention discloses an adaptive distributed support vector regression method to combat Byzantine faults. First, the objective function of the SVR model is smoothed to construct an empirical risk minimization objective function. Then, with t=1, the master machine obtains initial parameter estimates on its local data. In the t-th iteration, a MOM-based aggregation method is used to obtain the MOM estimate, which is then used as the global gradient estimate. Subsequently, a robust global gradient is obtained based on the global gradient estimate. After obtaining the robust global gradient, the master machine updates the global parameters using gradient descent. Finally, it checks whether the convergence condition is met. If the convergence condition is not met, the above steps are repeated; otherwise, the globally optimal parameter estimate is obtained. By introducing a robust aggregation mechanism based on the MOM method, it can effectively suppress the influence of abnormal machines, significantly improving the stability and robustness of the system while ensuring prediction accuracy. It can be widely applied to various practical distributed systems.

The application discloses a visibility determination method and device, equipment and a storage medium, and relates to the technical field of databases. The method comprises the following steps: in response to a first visibility judgment event of a target transaction being triggered, obtaining a current cache value from transaction public cache data of a node, and obtaining a first cache commit sequence number snapshot, wherein the transaction public cache data comprises a global commit sequence number in a cached metadata node; determining a first target commit sequence number snapshot of the target transaction according to the first cache commit sequence number snapshot; performing initial judgment on the visibility according to the first target commit sequence number snapshot; and in the case that the initial judgment result is visible, determining that the visibility judgment result of the first visibility judgment event is visible. Through the above technical solution, the communication cost with the metadata node can be reduced, and the efficiency of the visibility determination and the transaction execution efficiency can be improved.