Tencent Technology (shenzhen) Company Limited

Liebert Corporation

Bin Cui

Ming Huang

Pin Xiao

Jiawei Jiang

Benlong Hu

Lele Yu

A method and system for distributed machine learning and model training are disclosed. In particular, a finite asynchronous parallel training scheme is described. The finite asynchronous parallel training takes advantage of the benefits of both asynchronous parallel training and synchronous parallel training. The computation delays in various distributed computation nodes are further considered when training parameter are updated during each round of iterative training. The disclosed method and system facilities increase of model training speed and efficiency.

Distributed machine learning method and system

This invention relates to a T-type three-level inverter circuit. The circuit includes an absorption unit. In the absorption unit, a first terminal of the first resistor is connected to a positive bus terminal, and a second terminal of the first resistor is connected to a first terminal of the first capacitor and a negative electrode of the first diode; a second terminal of the first capacitor and an positive electrode of the first diode are respectively connected to an emitter and a collector of the first controllable switch tube; a first terminal of the second resistor is connected to a negative bus terminal, and a second terminal of the second resistor is connected to a positive electrode of a third diode; a negative electrode of the third diode is connected to both a first terminal of the second capacitor and a positive electrode of a second diode; and a second terminal of the second capacitor and a negative electrode of the second diode are respectively connected to a collector and a emitter of the second controllable switch tube. As the T-type three-level inverter circuit according to the invention is implemented, a voltage stress on the bidirectional switch tube is effectively reduced due to strong absorption capacity of the absorption unit, and thus the bidirectional switch tube can adopt a tube having a relatively low breakdown voltage value. Moreover, the absorption unit has a low cost and a small loss.

T-type three-level inverter circuit

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Shenzhen, China

Bin Cui