Abstract: The disclosure provides a data privacy protection method, a server device, and a client device for federated learning. A public dataset is used to perform model training on a machine learning model by a server device to generate a gradient pool including multiple first gradients. The gradient pool and the machine learning model are received by a client device. The client device uses a local dataset to perform model training on the machine learning model to obtain a second gradient. A local gradient is selected from the first gradients in the gradient pool according to the second gradient using a differential privacy algorithm by the client device. An aggregated machine learning model is generated by performing model aggregation based on the local gradient by the server device.

Abstract: The present invention discloses an integrated choke assembly comprising: a base having a main body structure, a first protruding part and a second protruding part. A first choke has a first magnetic core and a first winding, wherein the first protruding part is arranged through the first opening of the first magnetic core so that the first choke is arranged on the upper surface of the main body structure, and the first winding is wound on the first magnetic core. A second choke has a second magnetic core and a second winding, wherein the second protruding part is arranged through the second opening of the second magnetic core so that the second choke is arranged on the lower surface of the main body structure, and the second winding is wound on the second magnetic core.

Abstract: A mug with swivel-rings includes a cylindrical mug body having an outward flange around the top opening, a locating ring mounted around the mug body at the bottom through a high-frequency sealing process, an arched handle having two opposite ends respectively fixedly fastened to the outward flange of the mug body and the locating ring, and a plurality of swivel-rings revolvably mounted around the mug body and stopped between the outward flange of the mug body and the locating ring. The swivel-rings are respectively printed with a series of numbers or drawings such that they can be turned for learning or teaching arithmetic, or for providing various changeable patterns.