yt = beta0 + beta1*yt-1 + [(beta2 +beta3*yt-1)/(1 + exp(-gamma*(yt-1 - beta4)))] + et
where et is a white noise process. Click here to download the model.
|
|
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LINDO updates can now be received on your desktop, without you having to visit LINDO. LINDO proudly launched its entry into RSS world! Click here for more info. |
| LINGO 11.0 for Linux |
| Fri, 11 Apr 2008 11:00:00 CST |
| A new release of LINGO is now available on both Linux 32 and 64 bit. |
| This new version 11.0 includes major improvements to Simplex Solver, MIP Solver, Global Solver, Barrier Solver and Non-linear Solver. LINGO 11.0 takes advantage of multi-core systems to run two or more LINGO's four different LP solvers in parallel and return the solution from the solver that first finishes the optimization. The new K-Best MIP solver will return the K best solutions to integer models. See the full article for details. Click here to download and try the New LINGO 11.0 now. |
| LINGO 11.0 for Windows |
| Wed, 20 Feb 2008 16:31:00 CST |
| A new release of LINGO is now available on both 32 bit and 64 bit Windows. |
| This new version 11.0 includes major improvements to Simplex Solver, MIP Solver, Global Solver, Barrier Solver and Non-linear Solver. LINGO 11.0 takes advantage of multi-core systems to run two or more LINGO's four different LP solvers in parallel and return the solution from the solver that first finishes the optimization. The new K-Best MIP solver will return the K best solutions to integer models. See the full article for details. Click here to download and try the New LINGO 11.0 now. |
| What'sBest! 9.0.2.4 |
| Tue, 19 Feb 2008 16:05:00 CST |
| A new build of What'sBest! 9.0 is now available. |
| What’sBest! 9.0.2.4, a new build of LINDO Systems' Solver add-in for Excel®, is faster and more powerful and adds support for the recently released Microsoft® Office 2007 and uses the latest calculation libraries. See the full article for details. Click here to download now. |
| LINGO 11.0 on Windows |
| Mon, 21 Jan 2008 10:15:00 CST |
| A new release of LINGO is now available on both 32 bit and 64 bit Windows. |
| This new version 11.0 includes major improvements to Simplex Solver, MIP Solver, Global Solver, Barrier Solver and Non-linear Solver. LINGO 11.0 takes advantage of multi-core systems to run two or more LINGO's four different LP solvers in parallel and return the solution from the solver that first finishes the optimization. The new K-Best MIP solver will return the K best solutions to integer models. See the full article for details. Click here to download and try the New LINGO 11.0 now. |
| What'sBest! 9.0.2.2 |
| Thu, 13 Dec 2007 11:00:00 CST |
| A new build of What'sBest! 9.0 is now available. |
| What’sBest! 9.0.2.2, a new build of LINDO Systems' Solver add-in for Excel®, is faster and more powerful and adds support for the recently released Microsoft® Office 2007 and uses the latest calculation libraries.. See the full article for details. Click here to download now. |
| LINDO API 5.0.224 |
| Thu, 13 Dec 2007 11:00:00 CST |
| The new release of LINDO API 5.0 is now available. |
| LINDO API 5.0, a new release of LINDO Systems' callable library of optimization solvers, is faster, more flexible and more robust. The new release includes significant enhancements to all of the major solvers. See the full article for details. Click here to download and try LINDO API 5.0 now. |
| LINGO 10.0 for Windows |
| Thu, 13 Dec 2007 11:00:00 CST |
| A new build of LINGO 10.0 is available for download. |
| A new build on 32-bit Windows has recently been updated and is available for download. LINGO 10.0 has now been updated with the latest libraries. Significant improvements include bug fixes. Click here to download now. |
| LINGO 11.0 Beta on Windows32, x86 |
| Thu, 29 Nov 2007 09:10:00 CST |
| A new release of LINGO is available for download. |
| This new version 11.0 Beta includes major improvements to Simplex Solver, MIP Solver, Global Solver, Barrier Solver and Non-linear Solver. LINGO 11.0 takes advantage of multi-core systems to run two or more LINGO's four different LP solvers in parallel and return the solution from the solver that first finishes the optimization. The new K-Best MIP solver will return the K best solutions to integer models. There are still many more new features to try. Click here to download and try the New LINGO 11.0 Beta now. |
| What'sBest! 9.0.2.1 |
| Thu, 19 Oct 2007 08:45:00 CST |
| A new build of What'sBest! 9.0 is now available. |
| What’sBest! 9.0.2.1, a new build of LINDO Systems' Solver add-in for Excel®, is faster and more powerful and adds support for the recently released Microsoft® Office 2007 and uses the latest calculation libraries.. See the full article for details. Click here to download now. |
| LINDO API 5.0.183 |
| Thu, 19 Oct 2007 08:45:00 CST |
| The new release of LINDO API 5.0 is now available. |
| LINDO API 5.0, a new release of LINDO Systems' callable library of optimization solvers, is faster, more flexible and more robust. The new release includes significant enhancements to all of the major solvers. See the full article for details. Click here to download and try LINDO API 5.0 now. |
| LINGO 10.0 for Windows |
| Thu, 19 Oct 2007 08:45:00 CST |
| A new build of LINGO 10.0 is available for download. |
| A new build on both 32-bit and 64-bit Windows has recently been updated and is available for download. LINGO 10.0 has now been updated with the latest libraries. Significant improvements include bug fixes. Click here to download now. |
| What'sBest! 9.0.1.3 |
| Thu, 16 Aug 2007 06:30:00 CST |
| A new build of What'sBest! 9.0 is now available. |
| What’sBest! 9.0.1.3, a new build of LINDO Systems' Solver add-in for Excel®, is faster and more powerful and adds support for the recently released Microsoft® Office 2007. See the full article for details. Click here to download now. |
| LINDO API 5.0 |
| Mon, 14 May 2007 10:00:00 CST |
| The new release of LINDO API 5.0 is now available. |
| LINDO API 5.0, a new release of LINDO Systems' callable library of optimization solvers, is faster, more flexible and more robust. The new release includes significant enhancements to all of the major solvers. See the full article for details. Click here to download and try LINDO API 5.0 now. |
| What'sBest! 9.0 |
| Mon, 14 May 2007 10:00:00 CST |
| The new release of What'sBest! 9.0 is now available. |
| What’sBest! 9.0, a new release of LINDO Systems' Solver add-in for Excel®, is faster and more powerful and adds support for the recently released Microsoft® Office 2007. See the full article for details. Click here to download now. |
| LINDO API 5.0 Beta |
| Tue, 24 Apr 2007 12:00:00 CST |
| A new release of LINDO API 5.0 Beta is available for download. |
| This new version of 5.0 beta includes major enhancements for handling more difficult linear, nonlinear, and integer problems. LINDO API 5.0 also includes a special variant of the barrier solver specifically designed to solve Second-Order-Cone problems. LINDO API 5.0 offers two advanced implementations of the primal and dual simplex methods as the primary means for solving linear programming problems. LINDO API 5.0 is currently available on Solaris, Windows 32-bit for x86, Linux 32-bit for x86, Windows 64-bit for x64 and Linux 64-bit for x64. LINDO API 5.0 Beta has several other advantages. Click here to download and try LINDO API 5.0 Beta now. |
| What'sBest! 9.0.0.2 Beta |
| Wed, 04 Apr 2007 21:10:00 CST |
| A new release of What'sBest! is available for download. |
| This new version 9.0 beta includes major enhancements for handling more difficult linear, nonlinear, and integer problems. Now What'sBest! can support Users' Defined Functions made in VBA, and models with string arguments. This version 9.0 has been adapted to run with Excel® 2007. Click here to download now. |
| What'sBest! 8.0.4.7 |
| Tue, 19 Dec 2006 10:10:00 CST |
| A new release of What'sBest! is available for download. |
| A new build of the What'sBest! 8.0 has recently begun shipping and is now available for download. What’sBest! 8.0.4.7 has been updated with the latest calculation libraries from the LINDO API. Click here to download now. |
| LINGO 10.0 for Windows |
| Tue, 12 Dec 2006 11:10:00 CST |
| A new build of LINGO 10.0 is available for download. |
| A new build on both 32-bit and 64-bit Windows has recently been updated and is available for download. LINGO 10.0 has now been updated with the latest libraries. Significant improvements include bug fixes. Click here to download now. |
| What'sBest! 8.0.4.6 |
| Fri, 29 Sep 2006 11:10:00 CST |
| A new release of What'sBest! is available for download. |
| A new build of the What'sBest! 8.0 has recently begun shipping and is now available for download. What’sBest! 8.0.4.6 has been updated with the latest calculation libraries from the LINDO API. Click here to download now. |
| What'sBest! 8.0.4.5 |
| Thu, 07 Sep 2006 14:00:00 CST |
| A new release of What'sBest! is available for download. |
| A new release is available for download. What’sBest! 8.0.4.5 has been updated with the latest calculation libraries from the LINDO API. Click here to download now. |
| LINDO API 4.1 |
| Thu, 07 Sep 2006 16:00:00 CST |
| A new build of LINDO API 4.1 is available for download. |
| A new build of LINDO API is available for download on all the major platforms. LINDO API 4.1 has been updated with the latest libraries. Please visit the LINDO downloads section to download your desired version that suits your platform. |
| LINDO API 4.1 |
| Tue, 29 Aug 2006 10:35:00 CST |
| A new build of LINDO API 4.1 is available for download. |
| A new build of LINDO API is available for download on all the major platforms. LINDO API 4.1 has been updated with the latest libraries. Significant improvements include bug fixes. Please visit the LINDO downloads section to download your desired version that suits your platform. |
| What'sBest! 8.0.4.4 |
| Mon, 28 Aug 2006 08:30:00 CST |
| A new release of What'sBest! is available for download. |
| A new release is available for download. What’sBest! 8.0.4.4 has been updated with the latest calculation libraries from Lindo. Click here to download now. |
| LINDO API 4.1 for Mac |
| Tue, 25 Jul 2006 14:30:00 CST |
| A new build of LINDO API 4.1 is available for download. |
| A new build is available for download. LINDO API 4.1 has been updated with the latest libraries. Significant improvements include bug fixes. Click here to download now. |
| LINDO API 4.1 for Linux on x86 |
| Tue, 25 Jul 2006 14:30:00 CST |
| A new build of LINDO API 4.1 is available for download. |
| A new build is available for download. LINDO API 4.1 has been updated with the latest libraries. Significant improvements include bug fixes. Click here to download now. |
| What'sBest! 8.0.4.3 |
| Tue, 25 Jul 2006 14:30:00 CST |
| A new release of What'sBest! is available for download. |
| A new release is available for download. What’sBest! 8.0.4.3 has been updated with the latest calculation libraries from Lindo. Click here to download now. |
| LINGO 10.0 for Windows |
| Thu, 13 July 2006 16:08:00 CST |
| A new build of LINGO 10.0 is available for download. |
| A new build is available for download. LINGO 10.0 has now been updated with the latest libraries. Significant improvements include bug fixes. Click here to download now. |
| What'sBest! 8.0.4.2 |
| Tue, 20 Jun 2006 13:30:00 CST |
| A new release of What'sBest! is available for download. |
| A new release is available for download. What’sBest! 8.0.4.2 has been updated with the latest calculation libraries from Lindo. Click here to download now. |
| LINGO 10.0 for Windows 64-bit on x64 |
| Tue, 20 Jun 2006 13:30:00 CST |
| A new release of LINGO 10.0 for Windows 64-bit on x64 processor is available for download. |
| A new release is available for download. A faster, more powerful release of LINGO 10.0 for Windows 64-bit on x64 processor has recently begun shipping. LINGO 10 includes a number of new features that extend the functionality of the modeling language as well as several enhancements that boost the speed of the underlying solvers. For a complete list of the new features, click here. |
| LINGO 10.0 for Windows |
| Thu, 18 May 2006 11:00:00 CST |
| A new build of LINGO 10.0 is available for download. |
| A new build is available for download. LINGO 10.0 has now been updated with the latest libraries. Significant improvements include bug fixes. Click here to download now. |
| What'sBest! 8.0.4.1 |
| Wed, 10 May 2006 13:30:00 CST |
| A new release of What'sBest! is available for download. |
| A new release is available for download. What’sBest! 8.0.4.1 has been updated with the latest calculation libraries from Lindo. Click here to download now. |
| LINDO API 4.1 for Windows |
| Wed, 10 May 2006 13:00:00 CST |
| A new build of LINDO API 4.1 is available for download. |
| A new build is available for download. LINDO API 4.1 has been updated with the latest libraries. Significant improvements include bug fixes. Click here to download now. |
| LINGO 10.0 for Windows |
| Thu, 20 Apr 2006 10:20:00 CST |
| A new release of LINGO 10.0 for Windows platform is available for download. |
| A new release is available for download. A faster, more powerful release of LINGO has recently begun shipping. LINGO 10 includes a number of new features that extend the functionality of the modeling language as well as several enhancements that boost the speed of the underlying solvers. For a complete list of the new features, click here. |
| What'sBest! 8.0.4.0 |
| Fri, 07 Apr 2006 11:30:00 CST |
| A new release of What'sBest! is available for download. |
| A new release is available for download. What’sBest! 8.0.4.0 has been improved to better support the Excel INT function, display range information, and work with up-to-date calculation libraries. Click here to download now. |
| What'sBest! 8.0.3.6 |
| Wed, 08 Mar 2006 15:00:00 CST |
| A new release of What'sBest! is available for download. |
| What’sBest! 8.0.3.6 now supports NORMINV, NORMSDIST, and NORMSINV functions, provides the range information on the objective coefficients, and has improved the listing for the error messages.” Click here to download. |
| LINDO API |
| Fri, 24 Feb 2006 13:55:00 CST |
| LINDO Systems officially released LINDO API 4.0 for Solaris on x86 today. |
| In a continuous effort to retain its supremacy in Optimization Software, LINDO Systems Inc has now released the New LINDO API 4.0 for Solaris on Itanium processor. Click here, for the complete list of platforms on which LINDO API 4.0 is available. |
| Vehicle Routing and SCM Planner |
| Fri, 17 Feb 2006 13:14:00 CST |
| Updated versions of the Vehicle Routing model and SCM Planner model are available for download. |
| Updated versions of the Vehicle Routing model using What'sBest! and SCM Planner model using LINGO are available on the LINDO website now in the applications library section. Download the models here: |
| Supply Chain Engineering Cases |
| Wed, 15 Feb 2006 08:59:00 CST |
| An updated version of the Supply_Chain_Engineering_Cases.pdf paper has been added to the Applications Papers section of the library. |
|
This document provides a variety of mini-cases in Supply Chain Engineering. The situations covered include: simple distribution and DC location, FTL and LTL vehicle routing, production and demand planning, inventory management, international sourcing in the face of foreign exchange risk and tariffs, and incentive compatibility in supply chain contracts. Data for each mini-case are provided in a spreadsheet. Many of the cases have a “think outside the box” wrinkle whereby one can do better if one violates an intuitive but unnecessary constraint. The cases come from two sources: a) Developed and tested in a Logistics/Supply Chain course, and b) based on providing optimization based solutions to industrial supply chain customers. For more complicated cases, partially developed models are provided. Where spreadsheet models are provided, good professional quality spreadsheet style is used. These cases have been useful in the classroom, to supplement standard textbook problems with bigger more realistic situations, and for potential industrial users as illustrations of what improvements are possible. Click here to download the doc. |
| Kendall Tau |
| Fri, 10 Feb 2006 08:45:00 CST |
| The existing example LINGO model on Kendall Tau correlation coefficients is updated with a new and improved model. |
|
The advantage of the Kendall tau correlation coefficient is that it is non-parametric. E.g., if you compute the Kendall tau correlation for a set of uniform random variables, and then transform these uniforms into Normal random variables using monotonic increasing transformations, the Kendall tau correlation remains unchanged. Its value is in the range [-1,+1]. For the Normal distribution, the relationship between the standard linear correlation, rho, and tau is: rho = sin(tau*pi/2). This relationship holds more generally for any so-called elliptic distribution. Click here to download the model. |
| Road Repair |
| Wed, 08 Feb 2006 17:22:00 CST |
| A new Markovian Decision process model on Road Repair using LINGO has been added to the model library. |
|
Click here to download the model. |
| Lost Sales |
| Wed, 08 Feb 2006 17:22:00 CST |
| A new Markovian Decision process model on Lost Sales using LINGO has been added to the model library. |
|
Click here to download the model. |
| Vehicle Routing |
| Thu, 02 Feb 2006 17:36:00 CST |
| A new Vehicle Routing or LTL delivery model using What'sBest! has been added to the model library. |
|
The first city is the Depot city. Vehicles, each of the same capacity, maked deliveries to the other cities. Each city other than the first has a demand, e.g., number of pallets, to be delivered. We want to find routes for the vehicles so as to minimize the distance traveled. Click here to download the model. |
| Tool Timing |
| Thu, 26 Jan 2006 09:15:00 CST |
| A new paper on Move Optimization in Multi-Slide Metal Forming has been added to the Applications Papers section of the library. |
|
An important segment of the metal forming industry is small metal parts forming. A common machine type used in this segment is the .fourslide. or .multislide. forming machine. In these machines, a metal part is formed as a result of several rams or .slides. pressing against a metal part from several different directions, e.g., four or more. In order to form the part correctly, the rams must press against the part in a carefully choreographed sequence. A notable feature of these machines is high production rate, e.g., several parts per second. The production rate is limited by physical laws related to how much acceleration and resulting stress the components of the machine can tolerate as the machine runs faster. Usually there is some uncertainty about how much acceleration various parts of the forming machine can tolerate. We describe a method for designing this choreography of movement so as to maximize the production rate, subject to keeping the accelerations in an acceptable range. The method involves optimizing a model that is essentially a PERT/CPM critical path problem with .crashing. of activities. Click here to download the doc. |
| LINDO API 4.0.215 |
| Wed, 25 Jan 2006 16:18:00 CST |
| A new version of LINDO API is now available on the web for download. |
|
Click here to download the latest LINDO API software. |
| L-STAR(1) |
| Wed, 18 Jan 2006 14:36:00 CST |
| A new L-STAR(1) model using What'sBest! has been added to the model library |
|
Given a series of observations, we want to estimate the data generation process as a first order Logistic Smooth Transition Autoregressive Model: yt = beta0 + beta1*yt-1 + [(beta2 +beta3*yt-1)/(1 + exp(-gamma*(yt-1 - beta4)))] + et where et is a white noise process. Click here to download the model. |
| RAS Method |
| Wed, 18 Jan 2006 13:58:00 CST |
| A new model on Matrix Balancing with the RAS Criterion using What'sBest! has been added to the model library. |
|
Given the input-output structure of an economy for a base year, we want to update it with respect to known values of gross outputs, intermediate inputs and outputs of related sectors for the target year. Click here to download the model. |
| Glossary |
| Tue, 17 Jan 2006 13:28:00 CST |
| An updated version of the Supply Chain Glossary has been added to the Applications Papers section of the library. |
|
Old Glossary has been updated. Click here to download the latest doc. |
| Search LINDO |
| Sat, 14 Jan 2006 10:19:00 CST |
| LINDO web content is now searchable from LINDO's website! |
|
The entire web content including the model library is now searchable. Customers can nos search for their desired content by just typing in th ekeywords in the search box located at the bottom of the left side menu. Vist LINDO now! |
| What'sBest! 8.0.3.5 |
| Sat, 14 Jan 2006 10:19:00 CST |
| A new version of What'sBest! is now available on the web for download. |
|
Click here to download the latest version of What'sBest! software. |
| Stable Matching |
| Tue, 03 Jan 2006 22:18:00 CST |
| Two new LINGO models, Stable Marriage Assignment and Stable Roommate Matching have been added to the model library. |
| Stable Marriage Assignment. Each of n men specify a rank, 1, 2,..., n, for each of n women. Similarly, each of the n women specify a preference rank for each of the men. We want to assign or match the men and women in couples that are stable, i.e., there are no man i and woman j who are not paired up, but would prefer to be paired up rather than be paired with their current partner. This LINGO model will find such a pairing that will minimize the worst that any person gets treated under this pairing. |
|
Stable Roommate Matching.
Each of 2n people specify a rank, 1, 2,..., 2n-1, for each other person. We want to pair up the people into a stable set of pairs, i.e., there are no two people i and j who are not paired up, but would prefer to be paired up rather than be paired with their current partner. It may be that there is no such a stable pairing. This LINGO model will find such a pairing if one exists, and will minimize the worst that any person gets treated under this pairing. |
| Regression |
| Tue, 03 Jan 2006 22:16:00 CST |
| A regression model of LINGO that allows the user to set various weights and parameters controlling the style of regression has been added to the model library. |
|
Multiple linear weighted asymmetric regression.
User can specify: a) weight appled to error of each observation, b) a different weight for the up error as opposed to the down error, and c) the Norm to be used, e.g., absolute error or squared error. Click here to download the model. |