ISSM-ELM - a guide star selection for a small-FOV star sensor based on the improved SSM and extreme learning machine.

The construction of a guide star catalog is crucial for a star sensor to achieve accurate star map recognition and attitude determination. At present, the methods of a guide star catalog for a large field of view (FOV) star sensor have been relatively mature. However, for a small-FOV star sensor, there are still certain problems, such as a large storage capacity of a guide star catalog, uneven distribution of stars, and easy occurrence of voids.

[Promoting Nitrogen Removal in ANAMMOX Biofilm Reactor by Fe Under Low Nitrogen Concentration].

The feasibility for nitrogen removal in a two-stage ANAMMOX biofilm reactor promoted by Fe under low nitrogen concentration was investigated. The results showed that the ANAMMOX reaction could be effectively promoted by a (Fe) of 5, 10, and 15 mg·L. A (Fe) of 10 mg·L presented the highest promotion for the ANAMMOX reaction, with the highest nitrogen removal efficiency (NRE) of 81.

WITHDRAWN: Endovascular Repair with Stent-Graft of Symptomatic Tuberculous Aortic Pseudoaneurysm.

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