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AMPL Modeling Optimization Problems Questionnaire

AMPL Modeling Optimization Problems Questionnaire

Description

AMPL (www.ampl.com) is one of the most popular languages for modeling optimization problems. NEOS (http://neos-server.org/neos/) is an optimization server that allows users to submit their problems (in AMPL format and others) to a collection of solvers. A complete reference book on AMPL can be found here: https://ampl.com/resources/the-ampl-book/

Problem 1.

———Download the following three unconstrained problems dqrtic.mod, eigenbls.mod, freuroth.mod, from http://orfe.princeton.edu/~rvdb/ampl/nlmodels/cute/index.html. Submit each of them to the bound constrained solver, L-BFGS-B, on NEOS. Report the following:b.1 Briefly explain the main algorithm of L-BFGS-B.b.2 Generate a table that lists the solution time (an estimate will do) and solution quality of the three problems.


Problem 2.

The Rastrigin Function is a highly nonlinear function with many local minima. A description of the function can be found at http://tracer.lcc.uma.es/problems/rastrigin/rastrigin.html.

——–Use L-BFGS-B (through NEOS) to solve the Rastrigin problem. Generate a table that lists the solution time and solution quality, for n = 10, 20, 50, 100, 1000, 10000. Compare their performance and discuss your observation. If a solver fails to return a solution for a problem instance, report “failed” in the table.

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Our Service Charter

1. Professional & Expert Writers: Writing Expert only hires the best. Our writers are specially selected and recruited, after which they undergo further training to perfect their skills for specialization purposes. Moreover, our writers are holders of masters and Ph.D. degrees. They have impressive academic records, besides being native English speakers.

2. Top Quality Papers: Our customers are always guaranteed papers that exceed their expectations. All our writers have +5 years of experience. This implies that all papers are written by individuals who are experts in their fields. In addition, the quality team reviews all the papers before sending them to the customers.

3. Plagiarism-Free Papers: All papers provided by Writing Expert are written from scratch. Appropriate referencing and citation of key information are followed. Plagiarism checkers are used by the Quality assurance team and our editors just to double-check that there are no instances of plagiarism.

4. Timely Delivery: Time wasted is equivalent to a failed dedication and commitment. Writing Expert is known for timely delivery of any pending customer orders. Customers are well informed of the progress of their papers to ensure they keep track of what the writer is providing before the final draft is sent for grading.

5. Affordable Prices: Our prices are fairly structured to fit all groups. Any customer willing to place their assignments with us can do so at very affordable prices. In addition, our customers enjoy regular discounts and bonuses.

6. 24/7 Customer Support: At Writing Expert, we have put in place a team of experts who answer all customer inquiries promptly. The best part is the ever-availability of the team. Customers can make inquiries anytime.