Alibaba Group Holding Limited

Hangzhou Henuova Technology Co., Ltd.

Yu Fu

Xueqiang Wu

Xu Han

Qianyi Zhang

Yuewu Zhang

Weihua Zha

Miaoye Li

Junliang Liu

Han Gao

Weixing Yang

Zirui Wang

Dongbing Liu

Yanxing Bao

Jie Luo

Jianghang Lou

Weitao Shen

Jianxi Liu

Mengshi Sun

A distributed database system includes: a computing module configured to receive a transaction starting request; determine a target transaction and a target storage module corresponding to the target transaction based on the transaction starting request; send an execution instruction to a target storage module; send a commit instruction to the target storage module when the target storage module returns a message that the target transaction is executed successfully, the commit instruction including a commit timestamp of the target transaction; and the target storage module configured to receive the execution instruction, and execute the target transaction according to the execution instruction; return the message that the target transaction is successfully executed to the computing module when the target transaction is successfully executed; and receive the commit instruction, commit the target transaction according to the commit instruction, and generate a binary log according to the commit timestamp of the target transaction.

Distributed database system and data processing method

A device and a method for nondestructively detecting a transient characteristic of a conductive screw of a turbo-generator rotor are provided. The device includes a personal computer (PC), an extremely-steep pulse generator, an ultra-high-frequency double-isolation transformer, and a pulse emitting and coupling module, which are connected in sequence. The pulse emitting and coupling module is connected to a load. A synchronous pulse receiving non-inductive divider circuit synchronously receives a characteristic waveform from the load, and the synchronous pulse receiving non-inductive divider circuit is connected to an ultra-high-speed analog/digital (A/D) module through a nonlinear saturation amplifying circuit that amplifies a signal. The PC receives a signal from the ultra-high-speed A/D module. The load includes a positive or negative excitation lead loop that is in a 180° symmetrical and instantaneous short-circuit state and a rotor shaft. The device detects state of the conductive screw in a blind area of electromagnetic wave test.

Device and method for nondestructively detecting transient characteristic of conductive screw of turbo-generator rotor

Growing community of inventors

Hangzhou, China

Yu Fu