Results 111 to 120 of about 13,071 (304)

Improved Lagrange multiplier tests for spatial autoregressions [PDF]

, 2013
For testing lack of correlation against spatial autoregressive alternatives, Lagrange multiplier tests enjoy their usual computational advantages, but the (X2) first-order asymptotic approximation to critical values can be poor in small samples.
Robinson, Peter M., Peter M. Robinson, Rossi, Francesca, Francesca Rossi, Robinson, Peter   +4 more
core   +1 more source

Left Wanting and Left Unheard: A Dual Grievance Model of Populism Across Six European Countries

European Journal of Social Psychology, EarlyView.
ABSTRACT This study tests a dual grievance model of populism by examining whether relative deprivation and external political inefficacy are linked to two core dimensions of populist beliefs (people sovereignty and anti‐elitism) via aversive political emotions (anger, sadness and fear) and institutional distrust across six European countries (N = 5487).
Anna Cortijos‐Bernabeu, Matteo Cavallaro, Christian Staerklé   +2 more
wiley   +1 more source

On the Weierstrass Theorem on extrema and its application for finding fixed points and zeros of mappings

Bulletin of Mathematical Sciences
In this paper, we examine the applicability of the Lagrange Multiplier Rule, specifically the Karush–Kuhn–Tucker Theorem, to investigate the existence of fixed points and zeros of certain potential mappings between finite and infinite spaces.
Marek Galewski
doaj   +1 more source

Constrained optimization and Lagrange multiplier methods

, 1982
Constrained Optimization and Lagrange Multiplier ...
Bertsekas, Dimitri P, Rheinboldt, Werner
core  

lgrgtest: Lagrange multiplier test after constrained maximum-likelihood estimation [PDF]

Besides the Wald and likelihood-ratio tests, the Lagrange multiplier test (Rao, 1948, Mathematical Proceedings of the Cambridge Philosophical Society 44: 50–57; Aitchison and Silvey, 1958, Annals of Mathematical Statistics 29: 813–828; Silvey, 1959 ...
Tauchmann, Harald
core   +1 more source

An Efficient Quasi‐Static Condensation‐Based Framework for Seismic Analysis of Multi‐Supported Secondary Structures

Earthquake Engineering &Structural Dynamics, EarlyView.
ABSTRACT Multi‐supported non‐structural components (NSCs) are prone to seismic damage, yet their response prediction remains challenging when support motions are spatially incoherent. This study proposes an enhanced quasi‐static condensation (EQSC) method for linear, lightweight, dynamically detuned multi‐supported NSCs under the neglect of primary ...
Duozhi Wang, Fengze Li, Xudong Zhi, Nawawi Chouw, Rong Zhang, Feng Fan   +5 more
wiley   +1 more source

Lagrange multiplier based perceptual optimization for high efficiency video coding

, 2014
In this paper, a Lagrange multiplier based perceptual optimization scheme is proposed for high efficiency video coding (HEVC). Firstly, we propose a non-linear adjustment scheme for the Lagrange multiplier based on the specialized coding structure of ...
Wen Gao, Gao, Wen, Debin Zhao, Shanshe Wang, Ma, Siwei, Zhao, Debin, Wang, Shanshe, Siwei Ma   +7 more
core   +1 more source

New Generalised Semi‐Analytical Approach for the Multidimensional Nonlinear Collisional Fragmentation Equations

International Journal for Numerical Methods in Fluids, EarlyView.
This work aims to develop a generalised and efficient semi‐analytical method that combines the Laplace decomposition method with Pade approximation (LDMPA) to solve multidimensional nonlinear integro‐partial differential equation. For a one‐dimension case, explicit (closed‐form) solutions for the number density functions are derived for the first time.
Somveer Keshav, Ashok Das, Sukhjit Singh, Randhir Singh, Mehakpreet Singh   +4 more
wiley   +1 more source

Multicontinuum Homogenization for Poroelasticity Model

International Journal for Numerical Methods in Fluids, EarlyView.
This work derives a generalized multicontinuum poroelasticity model using the multicontinuum homogenization method to enable accurate coarse‐grid simulations of coupled flow–mechanics processes in highly heterogeneous porous media. Coupled constraint cell problems are formulated, and the corresponding multicontinuum equations are rigorously derived ...
Dmitry Ammosov, Mohammed Al Kobaisi, Yalchin Efendiev   +2 more
wiley   +1 more source

Solution of the Elliptic Interface Problem by a Hybrid Mixed Finite Element Method

Mathematics
This paper addresses the elliptic interface problem involving jump conditions across the interface. We propose a hybrid mixed finite element method on the triangulation where the interfaces are aligned with the mesh. The second-order elliptic equation is
Yuhan Wang, Peiyao Wang, Rongpei Zhang, Jia Liu   +3 more
doaj   +1 more source