Results 221 to 230 of about 1,713,872 (237)

Null Subjects and Control

2002
Abstract The standard, albeit problematical, assumption that PRO and pro are distinct is retained as a working hypothesis. Safir (1996: 84ff.) discusses criteria to differentiate PRO and pro: (i) pro, but not PRO, can be a resumptive pronoun in relative clauses in null subject languages; (ii) pro, but not PRO, can be an expletive; (iii ...
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An effective nulls control method

2009 3rd IEEE International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, 2009
The adaptive beamforming algorithm can aim at the direction-of-arrival of jammer automatically. But when the antenna platform vibrates or interference moves quickly, it is possible that the mismatching occurs between adaptive weight and data due to the perturbation of the interference location.
Ruiyan Du, Jinkuan Wang, Fulai Liu, Qinping Zhou   +3 more
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Null Controllability of Coupled Parabolic Systems with Switching Control

Applied Mathematics & Optimization
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Liu, Yuanhang, Wu, Weijia, Yang, Donghui
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Null controllability for a non-linear system with constrained control

2015 European Control Conference (ECC), 2015
We consider in this paper a cascade system of two parabolic equations, governed by a quasi-linear nonlocal operator. We study the null controllability of this problem with a control subject to constraints. We begin by proving the existence of a unique control of minimal norm for the linear problem. We combine these results with a fixed-point theorem to
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A Remark on Null Exact Controllability of the Heat Equation

SIAM Journal on Control and Optimization, 2001
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Null depth control for downlink adaptive array

ISSPA '99. Proceedings of the Fifth International Symposium on Signal Processing and its Applications (IEEE Cat. No.99EX359), 2003
Adaptive antenna arrays boost the desired signal and attenuate interference by steering beams and nulls in appropriate directions. Beamforming algorithms find difficulty in simultaneously keeping a zero-dB gain in the direction of the desired user and a deep null in the direction of a close interferer, when these directions are too close (only few ...
Tuan Nguyen, Reza Berangi, Mike Faulkner
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Estimation of Null Controllable Region

2019
In recent results on linear systems subject to actuator saturation, characterizations of null controllable regions form a guideline for searching feedback laws. Null controllable region , which is also called controllable set, is closely relative with time optimal control [25]. Null controllability of a control system is the possibility of steering its
Hongjiu Yang, Yuanqing Xia, Qing Geng
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Approximate Boundary Null Controllability

2019
In this chapter, we will define the approximate boundary null controllability for system (II) and the D-observability for the adjoint problem, and show that these two concepts are equivalent to each other. Moreover, the corresponding Kalman’s criterion is introduced and studied.
Tatsien Li, Bopeng Rao
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Null controllability of planar piecewise linear systems

SMC'03 Conference Proceedings. 2003 IEEE International Conference on Systems, Man and Cybernetics. Conference Theme - System Security and Assurance (Cat. No.03CH37483), 2004
In this paper, the controllability of a class of planar piecewise linear systems is investigated. An explicit necessary and sufficient condition for null controllability of such systems is established. Moreover, it is proved that the null controllability can be realized infinite steps.
Guangming Xie, Long Wang 0001, Bo Xun, Liang Zhao   +3 more
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Null Controllability for the Dissipative Semilinear Heat Equation

Applied Mathematics and Optimization, 2002
The authors study the exact null controllability for the semilinear heat equation in a bounded domain in \(\mathbb{R}^n\). The nonlinearity \(f\) is assumed to be Lipschitz continuous and dissipative. Even if \(f\) is mildly superlinear, the global controllability fails.
Aniţa, Sebastian, Tataru, Daniel
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