Results 91 to 100 of about 57,800 (281)

Joint Antenna Selection and Phase-Only Beamforming Using Mixed-Integer Nonlinear Programming

, 2018
In this paper, we consider the problem of joint antenna selection and analog beamformer design in downlink single-group multicast networks. Our objective is to reduce the hardware costs by minimizing the number of required phase shifters at the ...
Fischer, Tobias, Hegde, Ganapati, Matter, Frederic, Pesavento, Marius, Pfetsch, Marc E., Tillmann, Andreas M.   +5 more
core  

Local Polynomial Regression and Filtering for a Versatile Mesh‐Free PDE Solver

International Journal for Numerical Methods in Fluids, EarlyView.
A high‐order, mesh‐free finite difference method for solving differential equations is presented. Both derivative approximation and scheme stabilisation is carried out by parametric or non‐parametric local polynomial regression, making the resulting numerical method accurate, simple and versatile. Numerous numerical benchmark tests are investigated for
Alberto M. Gambaruto
wiley   +1 more source

Solving MINLP problems by a penalty framework [PDF]

, 2016
A penalty framework for globally solving mixed-integer nonlinear programming problems is presented. Both integrality constraints and nonlinear constraints are handled separately by hyperbolic tangent penalty functions.
Costa, M. Fernanda P., Fernandes, Edite Manuela da G. P., Rocha, Ana Maria A. C.   +2 more
core  

Consumer perceptions of farmers market performance: A comparative analysis across states and age groups

Journal of the Agricultural and Applied Economics Association, EarlyView.
Abstract The USDA Agricultural Marketing Service has invested in direct‐to‐consumer initiatives to expand local food consumption and enhance farmers market opportunities. To evaluate the effectiveness of these efforts, this study employs a sample‐selected ordered probit model to analyze consumer perceptions of farmers market performance across four ...
Azita Varziri, Timothy A. Woods, Shuoli Zhao   +2 more
wiley   +1 more source

A Group Rotate-Vector Algorithm for Mixed-Variable Optimization Problems

IEEE Access
Many engineering design optimization problems can be represented as mixed-variable optimization problems. This study presents a heuristic approach for solving mixed-variable optimization using rotation and contraction of vectors. The current optimization
Zhongming Li, Lutao Yan, Haiyuan Li, Lianxin Wang   +3 more
doaj   +1 more source

Multistage Expansion Co-Planning of Integrated Natural Gas and Electricity Distribution Systems

Energies, 2019
This paper focuses on expansion co-planning studies of natural gas and electricity distribution systems. The aim is to develop a mixed-integer linear programming (MILP) model for such problems to guarantee the finite convergence to optimality.
Mohammad Jooshaki, Ali Abbaspour, Mahmud Fotuhi-Firuzabad, Moein Moeini-Aghtaie, Matti Lehtonen   +4 more
doaj   +1 more source

Nonlinear Resonance Modulation in Single‐Crystalline VO2‐Integrated Si Ring Resonator

Laser &Photonics Reviews, EarlyView.
This work first demonstrates a single‐crystalline VO2–Si hybrid ring resonator. The epitaxial lift‐off process enables high‐quality VO2 integration on the dissimilar Si photonic platform. The high‐quality VO2 film exhibits exceptional nonlinear resonance modulation and a steep optical transition across the metal‐insulator transition. ABSTRACT The metal‐
Sebae Park, Dong Kyu Lee, Junyeop Kim, Sungwon Lee, Heedeuk Shin, Junwoo Son   +5 more
wiley   +1 more source

Nonlinear Integer Programming

, 2009
Research efforts of the past fifty years have led to a development of linear integer programming as a mature discipline of mathematical optimization.
A. Ben-Tal, A. Frangioni, A. Frangioni, A.I. Barvinok, A.I. Barvinok, A.M. Geoffrion, B. Bank, C. Buchheim, C.A. Meyer, C.H. Papadimitriou, D. Goldfarb, D. Vandenbussche, D. Vandenbussche, E. Balas, E. Balas, E. Balas, E. Boros, E.M.B. Smith, F. Santos, F.A. Al-Khayyal, G.P. McCormick, H.W. Lenstra, I. Quesada, J. Lee, J. Lee, J. Linderoth, J. Renegar, J. Renegar, J.A. Loera De, J.A. Loera De, J.A. Loera De, J.A. Loera De, J.A. Loera De, J.A. Loera De, J.B. Lasserre, J.E. Graver, J.E. Kelley Jr, J.P. Jones, K. Mulmuley, L. Liberti, L. Lovász, L.G. Khachiyan, M. Brion, M. Brion, M. Jach, M. Köppe, M. Köppe, M. Laurent, M. Putinar, M. Tawarmalani, M. Tawarmalani, M. Tawarmalani, M.A. Duran, M.D. Choi, M.E. Hartmann, M.R. Garey, M.T. Çezik, M.X. Goemans, N.V. Sahinidis, N.Z. Shor, O.K. Gupta, P. Bonami, P. Bonami, P. Bonami, P. Bonami, P.A. Parrilo, R. Hemmecke, R. Pörn, R.A. Stubbs, R.E. Gomory, R.G. Jeroslow, R.K. Ahuja, R.R. Thomas, S. Aktürk, S. Burer, S. Ceria, S. Heinz, S. Hoşten, S. Onn, S.P. Tarasov, T. Jacobi, T. Westerlund, T. Westerlund, W.J. Cook, Y. Berstein, Y. Berstein, Y.V. Matiyasevich   +86 more
core   +2 more sources

Conditional Generative Modeling for Enhanced Credit Risk Management in Supply Chain Finance

Naval Research Logistics (NRL), EarlyView.
ABSTRACT The rapid expansion of cross‐border e‐commerce (CBEC) has created significant opportunities for small‐ and medium‐sized sellers, yet financing remains a critical challenge due to their limited credit histories. Third‐party logistics (3PL)‐led supply chain finance (SCF) has emerged as a promising solution, leveraging in‐transit inventory as ...
Qingkai Zhang, L. Jeff Hong, Houmin Yan
wiley   +1 more source

All‐sky assimilation impacts of the Tomorrow.io microwave sounder constellation on global weather forecasts

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Key Findings: An assimilation methodology is established for the Tomorrow.io microwave sounder (TMS) flying on CubeSats in sun‐synchronous and inclined orbits, and in all cloud scenes. The TMS has a significant impact on weather forecast lead times up to 3 days in the Tropics in a research‐quality numerical weather prediction setting, and yields water ...
Jonathan J. Guerrette, Ryan Honeyager, Stephen Joseph Munchak, Xiaoxu Tian   +3 more
wiley   +1 more source