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Used GEKKO's APOPT solver in python to solve a MINLP. I had more than 1000 decision variables with bounds and both kind of constraints. The solver is so sensitive on initial conditions and ...
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May 31, 2020 · BISECTION_RC, a FORTRAN90 code which demonstrates the simple bisection method for solving a scalar nonlinear equation in a change of sign interval, using reverse communication (RC). The routine assumes that an interval [a,b] is known, over which the function f(x) is continuous, and for which f(a) and f(b) are of opposite sign.
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and Python. The script runs on desktop computers with meshes that have millions of nodes and can solve complete problems within minutes or hours. All computer-intensive calculations such as com-puting matrices, solving linear systems (via alge-braic multigrid and the conjugate gradient method), and solving ODE systems are done efﬁ-ciently in ...
SolverStudio is an add-in for Excel 2007 and later on Windows that allows you to build and solve optimisation models in Excel using any of the following optimisation modelling languages: PuLP, an open-source Python -based COIN-OR modelling language developed by Stu Mitchell. This version of Abaqus comes with Python 2.7.x as it's interpreter. OS: Red Hat Linux 6.x, which comes with Python 2.6.x I believe. I separately installed Python 2.7.x as an alternate install (called using python2.7 rather than python in order to not break any OS python scripts).
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Benney-Luke nonlinear wave equation. Solving the one-layer Quasi-Geostrophic equations. Computing eigenmodes of the Quasi-Geostrophic equations using SLEPc. A Quasi-Geostrophic wind driven gyre. Preconditioning saddle-point systems, using the mixed Poisson problem as an example. The Camassa-Holm equation, a nonlinear integrable PDE.
Recommender system is emerging as a powerful and popular tool for online information relevant to a given user. The traditional recommendation system suffers from the cold start problem and the data sparsity problem. Many methods have been proposed to solve these problems, but few can achieve satisfactory efficiency.
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May 07, 2019 · pyOpt is a Python-based package for formulating and solving nonlinear constrained optimization problems in an efficient, reusable and portable manner. Python programming uses object-oriented concepts, such as class inheritance and operator overloading, to maintain a distinct separation between the problem formulation and the optimization approach used to solve the problem.
The Linear System Solver is a Linear Systems calculator of linear equations and a matrix calcularor for square matrices. It calculates eigenvalues and eigenvectors in ond obtaint the diagonal form in all that symmetric matrix form. Also it calculates the inverse, transpose, eigenvalues, LU decomposition of square matrices.