363 research outputs found
Mo Yan’s \u3cem\u3eRadish\u3c/em\u3e: Between the Real and the Surreal
In their article “Mo Yan’s Radish: Between the Real and the Surreal” Xiaoyue Li and Xuefang Feng argue that Radish, a novella written by Nobel Prize winner Mo Yan skillfully combines realism with surrealism, the flexible swing between which is made possible by the choice of children’s perspective, and the effect is too significant to be ignored. Their analysis concludes that the transparent golden radish symbolizes humanity, the lack of which projects the protagonist’ sufferings, and that the surrealist description of the radish reveals the magic function of humanity in brightening up life in times of miseries
ON ITERATIVE LEARNING CONTROL FOR SOLVING NEW CONTROL PROBLEMS
Ph.DDOCTOR OF PHILOSOPH
Weighted endpoint estimates for commutators of multilinear fractional integral operators
summary:Let be a positive integer, , . We give sufficient conditions on weights for the commutators of multilinear fractional integral operators \Cal {I}^{\vec {b}}_{\alpha } to satisfy a weighted endpoint inequality which extends the result in D. Cruz-Uribe, A. Fiorenza: Weighted endpoint estimates for commutators of fractional integrals, Czech. Math. J. 57 (2007), 153–160. We also give a weighted strong type inequality which improves the result in X. Chen, Q. Xue: Weighted estimates for a class of multilinear fractional type operators, J. Math. Anal. Appl., 362, (2010), 355–373
Robust Adaptive Learning-based Path Tracking Control of Autonomous Vehicles under Uncertain Driving Environments
This paper investigates the path tracking control
problem of autonomous vehicles subject to modelling uncertainties and external disturbances. The problem is approached
by employing a 2-degree of freedom vehicle model, which is
reformulated into a newly defined parametric form with the
system uncertainties being lumped into an unknown parametric
vector. On top of the parametric system representation, a novel
robust adaptive learning control (RALC) approach is then
developed, which estimates the system uncertainties through
iterative learning while treating the external disturbances by
adopting a robust term. It is shown that the proposed approach
is able to improve the lateral tracking performance gradually
through learning from previous control experiences, despite only
partial knowledge of the vehicle dynamics being available. It is
noteworthy that a novel technique targeting at the non-square
input distribution matrix is employed so as to deal with the
under-actuation property of the vehicle dynamics, which extends
the adaptive learning control theory from square systems to
non-square systems. Moreover, the convergence properties of
the RALC algorithm are analysed under the framework of
Lyapunov-like theory by virtue of the composite energy function
and the λ-norm. The effectiveness of the proposed control
scheme is verified by representative simulation examples and
comparisons with existing methods
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