Results 21 to 30 of about 469,727 (312)

Simple approach for solution of the quasi-plane-strain problem in a circular tunnel in a strain-softening rock mass considering the out-of-plane stress effect

Underground Space, 2020
The out-of-plane stress is sometimes the major or intermediate principal stress in a circular tunnel opening. The influences of the out-of-plane stress and axial strain are often neglected in the stability analyses of tunnel excavation, which can induce ...
Jinfeng Zou, Lu Liu, Mingyao Xia
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On the integral characterization of principal solutions for half-linear ODE

Electronic Journal of Qualitative Theory of Differential Equations, 2013
We discuss a new integral characterization of principal solutions for half-linear differential equations, introduced in the recent paper of S. Fisnarova and R. Marik, Nonlinear Anal. 74 (2011), 6427-6433.
M. Cecchi, Zuzana Dosla, Ondrej Dosly, Mauro Marini   +3 more
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Nonlinear descriptions of vertical earth pressure against positive buried pipelines based on minor principal stress trajectory

Yantu gongcheng xuebao, 2021
This study presents a nonlinear solution of vertical earth pressure against positive buried pipelines with three kinds of minor principal stress trajectories, such as the circular arc, the parabolic curve, and the rotation angle linearly changed.
ZHANG Chang-guang 1, 2, WU Kai 1, SUI Jian-hao 1
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Dynamics of Fractional Delayed Reaction-Diffusion Equations

Entropy, 2023
The long-term behavior of the weak solution of a fractional delayed reaction–diffusion equation with a generalized Caputo derivative is investigated.
Linfang Liu, Juan J. Nieto
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Existence of a solution to the principal's problem [PDF]

Brazilian Review of Econometrics, 1987
This article deals with the existence of a solution to the Principal Agent Problem. Here we develops some basic results with the aid of Berge's Maximum Theorem. Also, a presentation of some interesting examples is given.
openaire   +2 more sources

Exact Solution Analysis of Strongly Convex Programming for Principal Component Pursuit

Information, 2017
In this paper, we address strongly convex programming for principal component analysis, which recovers a target matrix that is a superposition of low-complexity structures from a small set of linear measurements.
Qingshan You, Qun Wan
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Families of Principal Solutions of Ordinary Differential Equations [PDF]

Transactions of the American Mathematical Society, 1963
Let A(y, Dy, ..., D'y) = 0 be an algebraic differential equation belonging to Strodt's class (D) [1, p. 5], and let M be a principal monomial [1, ?66] for A = 0. In search for principal solutions of A = 0 (i.e., solutions which are M) one substitutes y = M(1 + z).
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Optimal Solutions for Sparse Principal Component Analysis

J. Mach. Learn. Res., 2007
Revised journal version. More efficient optimality conditions and new examples in subset selection and sparse recovery.
Alexandre d'Aspremont, Francis R. Bach, Laurent El Ghaoui   +2 more
openaire   +3 more sources

Practical solutions for complex variable function for radius of tunnel plastic zone under non-hydrostatic pressures and their application extension

Yantu gongcheng xuebao, 2023
In order to address the non-circular plastic boundary of rock circular tunnels under non-hydrostatic pressures, a simple complex variable function for the stress in an elastic zone is firstly introduced by using the analogy method.
ZHANG Changguang 1, 2, LI Zonghui 1, MENG Xiangzhong 1, WANG Xiaolun 1, LI Tianbin 2
doaj   +1 more source

Weakly Increasing Solutions of Equations with p-Mean Curvature Operator

Mathematics
Globally positive unbounded solutions, with zero derivative at infinity, are here considered for ordinary differential equations involving the generalized Euclidean mean curvature operator.
Zuzana Došlá, Mauro Marini, Serena Matucci   +2 more
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