The Fourth Paradigm (beijing) Tech Co Ltd

China Petroleum & Chemical Corporation

Research Institute of Petroleum Processing, Sinopec

Guangdong University of Technology

Colgate Palmolive Company

Yun Xu

Xiao Yi Huang

Michael Prencipe

Zhangyu Li

Yuan Hui Xie

Xiong Fei Qin

Wei Wang

Kai Wang

Jun Long

Huiping Tian

Steven W Fisher

Zhenyu Chen

Yuxia Zhu

Lyndsay Schaeffer-Korbylo

Betty Won

Yi Fang

Dandan Chen

Yujian Liu

Manying Shi

Shao Peng Xu

Xiaoyi Huang

Liang Lv

Jing F Fan

Yuyan Zeng

Dingfei Ma

Bo Nie

Yuan Wu

Xiaojing Lv

Liuzhou Zhao

Xiaomin Li

Guangxin Lin

Yuanhui Xie

Xiongfei Qin

Wei Song

Chen Lou

Jing Fan

Hailiang Lu

A coding method based on multiple-mode orthogonal frequency division multiplexing with index modulation (MM-OFDM-IM) is provided. A coded bit sequence is divided into an index-layer sequence and a symbol-layer sequence. According to the index-layer sequence and the symbol-layer sequence, a plurality of constellation modes respectively corresponding to the plurality of subcarriers and which one of a plurality of constellation symbols respectively corresponding to the plurality of constellation modes is carried by each of the plurality of subcarriers are determined. A constellation mode permutation corresponding to each of the plurality of subcarriers is in a symmetrical distribution. The coded bit sequence is converted into the plurality of constellation symbols. The plurality of constellation symbols are respectively loaded to the plurality of subcarriers. A coding device based on MM-OFDM-IM is also provided.

Coding method and device based on multiple-mode orthogonal frequency division multiplexing with index modulation (MM-OFDM-IM)

Display screen with a machine learning graphical user interface

Computer display with graphical user interface

Display screen with transitional graphical user interface

A catalyst for catalytically cracking hydrocarbon oils contains a substrate comprising alumina and a molecular sieve, characterized in that the pore distribution of said catalyst is 5-70% of the &#x3c;2 nm pores, 5-70% of the 2-4 nm pores, 0-10% of the 4-6 nm pores, 20-80% of the 6-20 nm pores, and 0-40% of the 20-100 nm pores, based on the pore volume of pores having a size of no more than 100 nm. The catalyst of this invention has a large BET pore volume, a high capacity for cracking heavy oils, and a high capacity for resisting coking.

Catalytic cracking catalyst, its preparation and use

Growing community of inventors

Beijing, China

Yun Xu