Results 171 to 180 of about 220,920 (303)

A Q‐Learning Algorithm to Solve the Two‐Player Zero‐Sum Game Problem for Nonlinear Systems

International Journal of Adaptive Control and Signal Processing, Volume 39, Issue 3, Page 566-581, March 2025.
A Q‐learning algorithm to solve the two‐player zero‐sum game problem for nonlinear systems. ABSTRACT This paper deals with the two‐player zero‐sum game problem, which is a bounded L2$$ {L}_2 $$‐gain robust control problem. Finding an analytical solution to the complex Hamilton‐Jacobi‐Issacs (HJI) equation is a challenging task.
Afreen Islam, Anthony Siming Chen, Guido Herrmann   +2 more
wiley   +1 more source

Biomanufacturing in low Earth orbit for regenerative medicine. [PDF]

Stem Cell Reports, 2022
Sharma A, Clemens RA, Garcia O, Taylor DL, Wagner NL, Shepard KA, Gupta A, Malany S, Grodzinsky AJ, Kearns-Jonker M, Mair DB, Kim DH, Roberts MS, Loring JF, Hu J, Warren LE, Eenmaa S, Bozada J, Paljug E, Roth M, Taylor DP, Rodrigue G, Cantini P, Smith AW, Giulianotti MA, Wagner WR.   +25 more
europepmc   +1 more source

Virtual Stationary Satellites over Any Area of the Earth for a Continuous or Set Amount of Time [PDF]

Various embodiments may provide systems and methods for achieving continuous measurements (e.g., continuous video images) of the same spot on the Earth using Low Earth Orbit (LEO) satellite constellations and/or Middle Earth Orbit (MEO) satellite ...
Horan, Stephen J., Regan, Curtis R.
core   +1 more source

A Robust Adaptive One‐Sample‐Ahead Preview Super‐Twisting Sliding Mode Controller

International Journal of Adaptive Control and Signal Processing, EarlyView.
Block Diagram of the Robust Adaptive One‐Sample‐Ahead Preview Super‐Twisting Sliding Mode Controller. ABSTRACT This article introduces a discrete‐time robust adaptive one‐sample‐ahead preview super‐twisting sliding mode controller. A stability analysis of the controller by Lyapunov criteria is developed to demonstrate its robustness in handling both ...
Guilherme Vieira Hollweg, Paulo Jefferson Dias de Oliveira Evald, Shivam Chaturvedi, Hilton Abilio Gründling, Rodrigo Varella Tambara, Wencong Su   +5 more
wiley   +1 more source

Metamaterial Based Ku-Band Antenna for Low Earth Orbit Nanosatellite Payload System. [PDF]

Nanomaterials (Basel), 2023
Alam T, Islam MT, Hakim ML, Alharbi KH, Singh MSJ, Sheikh MM, Aldhaheri RW, Islam MS, Soliman MS.   +8 more
europepmc   +1 more source

On the Lightweight Potential of Laser Additive Manufactured NiTi Triply Periodic Minimal Sheet Lattices

Advanced Engineering Materials, EarlyView.
This study explores the lightweight potential of laser additive‐manufactured NiTi triply periodic minimal surface sheet lattices. It systematically investigates the effects of relative density and unit cell size on surface quality, deformation recovery, compression behavior, and energy absorption.
Haoming Mo, Shuo Qu, Shiming Gao, Xu Song   +3 more
wiley   +1 more source

Biomanufacturing in low Earth orbit: A paradigm shift. [PDF]

Stem Cell Reports
Marotta D, Ward N, Bauer SR, Hunsberger J, Stoudemire J, Savin K, Giulianotti M, Jamieson CHM, Roberts D, Roberts M.   +9 more
europepmc   +1 more source

Glycogen metabolism is required for optimal cyanobacterial growth in the rapid light-dark cycle of low-Earth orbit. [PDF]

Life Sci Space Res (Amst), 2023
Bishé B, Golden SS, Golden JW.
europepmc   +1 more source

LSTM-Assisted Doppler Opportunistic Positioning with Low Earth Orbit Satellites

天地一体化信息网络
Opportunistic positioning using the instantaneous Doppler frequency offset of low earth orbit (LEO) satellite communication signals faces the following problems: significant impact of frequency offset estimation errors on positioning accuracy and ...
Wei Yuming, Cui Gaofeng, Wu Mengjing, Wang Weidong   +3 more
doaj  

Conceptual design of a two-stage-to-orbit vehicle [PDF]

A conceptual design study of a two-stage-to-orbit vehicle is presented. Three configurations were initially investigated with one configuration selected for further development.

core   +1 more source