Results 231 to 240 of about 1,515 (263)

Tests of the Null Hypothesis in Case-Control Studies

Biometrics, 1984
The relative merits of the likelihood ratio statistic, the Wald statistic, and the score statistic are examined by an empirical evaluation based on matched case-control data. A mixture model for the relative-odds function is used. The likelihood ratio statistic is relatively constant for reasonable values of the mixture parameter, but the Wald ...
Lustbader, Edward D., Moolgavkar, Suresh H., Venzon, David J.   +2 more
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On the null-controllability of a radiative heat transfer system

European Journal of Control, 2021
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Mohamed Ghattassi, Takéo Takahashi
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Null Controllability of Semilinear Delay Control Systems

International Journal of Dynamical Systems and Differential Equations
Summary: In this paper, the null controllability results for a class of semilinear delay control systems have been established. The fundamental semigroup is generated by using the perturbation due to the linear delay operator, which defines the fundamental solution of the system.
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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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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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On the null controllability of parabolic equations with nonlinear memory

International Journal of Control, 2018
In this paper, we study the global null controllability of nonlinear parabolic integro-differential equations arising in reactor dynamics with internal distributed control.
Qiang Tao, Hang Gao 0001
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