Chinese Academy of Sciences

Beijing University of Posts and Telecommunications

State Grid Liaoning Power Co., Ltd. Dalian Power Suoply Company

Lin Liu

Zhongmin Liu

Peng Fei Tian

Miao Yang

Shiyun Sang

Yue Yang

Bing Li

Hongyi Yang

Linying Wang

Rentao Gu

Yuefeng Ji

Xiao Xiang

Yanli He

Pengfei Wu

Meng Lian

Jingzhao Luan

Baoli Wang

The invention discloses a cross-layer network fault recovery system and method based on configuration migration. The method includes: an upper layer switching network controller sends device fault information to a super controller; the super controller performs a fault device location, and selects a backup upper layer switching network device in an upper layer switching network; the super controller generates a third forwarding table, and delivers the third forwarding table to an upper layer switching network controller and an underlying layer switching network controller; the upper layer switching network controller generates a first forwarding table to be updated according to the third forwarding table, and delivers the first forwarding table to neighbor devices of the fault device and the backup upper layer switching network device; the underlying layer switching network controller calculates underlying layer switching network transmission channels according to the third forwarding table, and updates a second forwarding table of the underlying layer switching network devices on these transmission channels. The invention utilizes the reconfigurability of the underlying layer switching network to allow rapid replacement of the fault device and service recovery in the upper layer switching network.

Cross-layer network fault recovery system and method based on configuration migration

The present application discloses a catalyst, the catalyst contains a molecular sieve, there is at least one-dimension 8-membered ring channel in the molecular sieve structure, the diameter of a diffusible substance in the direction of the 8-membered ring channel is no less than 2.0 &#x212b;, the diameter of a substance that can be accommodated in the molecular sieve structure is no more than 6 &#x212b;; the catalyst is used for a methanol and/or dimethyl ether to propylene reaction, comprising contacting methanol and/or dimethyl ether with a methanol-to-propylene catalyst to obtain propylene.

Molecular sieve catalyst, preparation method therefor and application thereof

A preparation method for a metal-modified SAPO molecular sieve is disclosed, characterized in adding a raw powder of the SAPO molecular sieve to a solution containing metal ions for performing ion exchange, and then washing and drying the obtained solid after ion exchange, so as to obtain the metal-modified SAPO molecular sieve. The metal-modified SAPO molecular sieve prepared has a relatively high degree of crystallinity, and the metal elements occupy the ionic positions in the channels and/or cages of the SAPO molecular sieve, and the metal-modified SAPO molecular sieve shows excellent catalytic performance in the catalytic reaction.

Preparation method for metal-modified SAPO molecular sieve

A method for synthesizing a nano SAPO-34 molecular sieve, and an SAPO-34 molecular sieve catalyst and application thereof. A nano SAPO-34 molecular sieve is synthesized by adding a microporous templating agent and a templating agent having a functionalized organic silane to hydrothermal synthesis. The nano SAPO-34 molecular sieve is calcined to obtain a nano SAPO-34 molecular sieve catalyst. The catalyst can be used in a reaction for preparing low-carbon olefin from an oxygen-containing compound. The nano SAPO-34 molecular sieve obtained by this method has a pure CHA crystal phase. Moreover, the nano SAPO-34 molecular sieve catalyst obtained by this method has good catalytic performance in a MTO reaction, the service life of the catalyst is significantly prolonged, and the selectivity of the low-carbon olefin is improved.

Method for synthesizing nano SAPO-34 molecular sieve, and SAPO-34 molecular sieve catalyst and application thereof

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Dalian, China

Lin Liu