Liu Gang

Liu Gang (Chinese: 刘刚; born 30 January 1961) is a Chinese-born American aerospace engineer, computer scientist, optical physicist, political activist, and writer.

[2] As an undergraduate student at University of Science and Technology of China in Hefei, Liu met Fang Lizhi, a pro-democracy activist.

[5][6][7][8][9][10] After his release from prison in 1996, Liu continued to advocate for human rights in China and organized an underground democracy movement.

In 1988, Liu became an assistant and associate researcher at the Wear-Resistant Materials Development Company of the National Ministry of Higher Education & the Dalian Institute of Technology.

[18] Liu gained employment as a member of technical staff (MTS) at the Mathematics of Networks and Systems Research Department at Bell Laboratories in Murray Hill, New Jersey.

There he worked on Optical telecommunication network design and planning, routing algorithms, optimization techniques, and economic models and strategy analysis.

[19] Liu's areas of research included: SPIDER, a design tool for fast-restoration in all-optical networks; VPNStar, a system for provisioning multi-service VPNs with Quality of service guarantees over Internet Protocol; in software design, a management system for Lambda Router in all-optical networks; and analysis of Internet pricing.

Liu and his colleagues are developing techniques for efficient and reliable optical network design, covering decentralized dedicated protection to shared path-based mesh restoration.

Graph of a strictly concave quadratic function with unique maximum.
Optimization computes maxima and minima.