Beijing Aerospace Propulsion Institute

Beijing Aerospace Petrochemical Technology & Equipment Engineering Corporation Limited

Capital Medical University

Jin Guo

Fan Yang

Huan Yang

Yingren Ding

Jingbo Han

Xiang Su

Jinxian Liu

Qiang Li

Jingjing Wang

Yusheng Guo

Pingyang Zheng

Xiuhua Guo

Ni Gao

Qingzhao Yang

Yanxia Luo

Disclosed is a valve mechanical linkage system. A valve comprises a main valve and a secondary valve; the system comprises a first transmission mechanism and a second transmission mechanism; the first transmission mechanism is connected with the main valve and used for converting the up-and-down reciprocating motion of the main valve into a rotational reciprocating motion; the first transmission mechanism and the second transmission mechanism are connected by means of a coupling (), and the rotational force of the rotational reciprocating motion is transferred to the second transmission mechanism by means of the coupling (); the second transmission mechanism is connected with the secondary valve, and achieves on-off control on the secondary valve by converting the rotational reciprocating motion into the up-and-down reciprocating motion.

Valve mechanical linkage system

A double-plate gate valve includes a valve body, a valve cover, a valve stem, a guide plate, a goggle plate assembly, a diversion hole assembly, a disc spring assembly and a valve plate and wedge assembly. The goggle plate assembly provides mounting support for the diversion hole assembly and the valve plate and wedge assembly in the valve chamber, the goggle plate assembly is movable along with the diversion hole assembly and the valve plate and wedge assembly in the valve chamber, and floating seals are formed at a contact surface between the diversion hole assembly and the guide plate, and at a contact surface between the valve plate and wedge assembly and the guide plate. A face-to-face distance and a sealing force between a sealing surface of the diversion hole assembly and a sealing surface of the valve body are adjustable.

Double-plate gate valve and use of the same

Disclosed is a method for establishing a prediction model based on a multidimensional texture of brain nuclear magnetic resonance images. Images are segmented using a region growing method, a contourlet transform method is used to extract an edge texture feature parameter of ROIs, a multidimensional database is established, and a prediction model is established using various data mining methods, comprising a Gaussian process, a support vector machine, a random forest, a Lasso regression and a semi-supervised support vector machine. The ROIs comprise a hippocampus region and an entorhinal cortex region.

Method for establishing prediction model based on multidimensional texture of brain nuclear magnetic resonance images

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Beijing, China

Jin Guo