Publications

Those LEDAS publications that are not directly accessible from this web-site, can be ordered at info@ledas.com.

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A book published by LEDAS Ltd. - Novosibirsk, Russia, 2006, 180 p. (In Russian) INTRODUCTION TO MATHEMATICAL BACKGROUND OF CAD/CAM/CAE Dmitry Ushakov 20 Feb 2006 The monograph presents a short description of lectures on "Introduction to mathematical background of CAD/CAM/CAE" organized by Common Informatics sub-faculty of IT department of Novosibirsk State University with the support of LEDAS Ltd. The lectures are intended for last-years students specialized in the field of applied mathematics, computer science, and information technologies. The material can also be useful for CAD/CAM/CAE/PLM developers, scientists, engineers, and all people interested in modern tendencies of computer-aided industry. Fixed link :: http://ledas.com/consulting/publications?pub=53

International Journal of Product Lifecycle Management (IJPLM), Vol. 1, No. 2, 2006 Special Issue on Towards Intelligent PLM Systems: Mathematical Methods, Technologies and Applications Dominique Michelucci and David Levin (Guest Editors) 06 Jan 2006 Today constraints, features and designers’ intents pervade all moments of the lifecycle of manufactured products: design, conception, optimisation, manufacturing, assembling, disassembling, maintenance, data exchange and reverse engineering, which constitutes the so called PLM (Product Lifecycle Management). The aim of this special issue of the International Journal of Product Lifecycle Management is to present the approaches and results in research and technology that improve the intelligence of market oriented solutions and products in PLM, computer graphics, virtual reality, simulation, computer games, multimedia, and other adjacent domains – with special emphasis on development and application of the constraint based techniques and geometrical solving. This special issue is based on lectures presented at the first international workshop "Constraint-based approaches and methods of mathematical modelling for intelligent PLM systems: from methods to applications" (isiCAD-2004) held in Novosibirsk, Russia in June 2004. The isiCAD-2004 workshop was aimed at outlining the relationship between two dimensions: the above mentioned domains and, on the other hand, the methods that are soundly expected to support and improve intelligence for those domains. Bringing together of the domains in question and the relevant methods for improving the domain’s intelligence was fruitful, and enabled establishing of the isiCAD community. Another important aim of the event was to bring together researchers, developers, solution providers, distributors and customers of PLM and close domains in order to achieve better mutual understanding about tendencies, requirements, demands, problems, affordability and prospects. Fixed link :: http://ledas.com/consulting/publications?pub=52

Preprint N18: (in Russian) INTRODUCTION TO MATHEMATICAL BACKGROUND OF CAD/CAM/CAE/PLM. Part II Dmitry Ushakov 23 Dec 2005 This work is the second part of an extended annotation to the course of lessons "Introduction to mathematical background of CAD/CAM/CAE/PLM" organized by Common Informatics sub-faculty of IT department of Novosibirsk State University with the support of LEDAS Ltd. The lectures are intended for last-years students specialized in the field of applied mathematics, computer science, and information technologies. The material can also be useful for CAD/CAM/CAE/PLM devlopers, scientists, engineers, and all people interested in modern tendencies of computer-aided industry. Fixed link :: http://ledas.com/consulting/publications?pub=18

Preprint N17: (in Russian) INTRODUCTION TO MATHEMATICAL BACKGROUND OF CAD/CAM/CAE/PLM. Part I Dmitry Ushakov 20 Sep 2005 This work is the first part of an extended annotation to the course of lessons "Introduction to mathematical background of CAD/CAM/CAE/PLM" organized by Chair of General Informatics of FIT (Faculty of Information Technologies) of Novosibirsk State University with the support by LEDAS Ltd. The lectures are intended for last-years students specialized in the field of applied mathematics, computer science, and information technologies. The material can also be useful for CAD/CAM/CAE/PLM devlopers, scientists, engineers, and all people interested in modern tendencies of computer-aided industry. Fixed link :: http://ledas.com/consulting/publications?pub=17

Preprint N16: (in English) LEDAS FreeTime: PRODUCT OVERVIEW A.Ershov, V.Kornienko, S.Preis, A.Rasskazov, I.Rykov, D.Ushakov 30 Aug 2005 This technical publication presents a current (July 2005) state of an end-user software solution FreeTime for computer-aided optimal scheduling of meetings produced by LEDAS. The solution is based on client-server architecture and makes it possible to coordinate team work using different devices: PDAs, mobile phones, and notebooks. The paper oveviews the purpose of FreeTime, its use-cases, architecture, algorithmic core, strengths for the market, and plans for the further development. pdf version (eng)    pdf version (rus) Fixed link :: http://ledas.com/consulting/publications?pub=16

Preprint N15: (in English and Russian) LSE: NEW SCHEDULING ENGINE FOR LEDAS SCHEDULER 3.0 AND PERSPECTIVES OF ITS USAGE A.Ershov, I.Ivanov, V.Kornienko, S.Preis, A.Rasskazov, I. Rykov 08 Feb 2005 This paper presents LEDAS Scheduler 3.0, a new version of the integrated environment for specification, modification, and solution of scheduling problems. Version 3.0 is based on the new LSE engine, which improves efficiency of solution by an order of magnitude, particularly in the most common classes of problems, due to new high-performance algorithms designed and implemented by LEDAS. The paper presents the necessary information about the components of the project: architecture, algorithms, and interface of the new engine, LSE, as well as the latest results of testing. In addition, it contains a comprehensive examination of the possibilities of integration of LEDAS Scheduler 3.0 into other products, in particular, into the systems currently under development in LEDAS, such as MORE+, a client-server system for automated meeting scheduling on conventional and mobile platforms, and a project scheduling system for the Eclipse platform with functions similar to those of Microsoft Project. pdf version(eng)     pdf version (rus) Fixed link :: http://ledas.com/consulting/publications?pub=15

Preprint N14: (in Russian) SUMMARY OF BASIC 2D CONSTRAINT SOLVING May 2004 Christoph M. Hoffmann 06 Jul 2004 This preprint presents a Russian translation of a brief narrative kindly provided by Professor Christoph M. Hoffmann for publication in the Proceedings of isiCAD-2004 Forum (21-23 June 2004) in Novosibirsk Scientific Center and also for a special Russian publication as a preprint of the LEDAS Company. Appendix contains the slides that illustrate the paper. Fixed link :: http://ledas.com/consulting/publications?pub=14

Preprint N13: (in English and Russian) PROSPECTS OF LGS: APPLICATION AND DEVELOPMENT Sergey Preis 18 Jun 2004 The paper presents LGS, a geometric solver by LEDAS for systems requiring solution of geometric problems with constraints. LGS is presently a stable marketable product, and so the paper focuses on the future of LGS, such as possible development paths and applications to real tasks. Apart from the traditional use in large parametric CSD systems, possibilities for integrating the solver in small CADs and three-dimensional modeling systems are examined. Fixed link :: http://ledas.com/consulting/publications?pub=13

isiCAD-2004. Proceedings of the International Forum. Novosibirsk, LEDAS Ltd., 2004 - 331 p. 04 Jun 2004 The volume comprises the papers and abstracts selected at isiCAD-2004: The International Forum Research & Market Solutions for PLM (Product Lifecycle Management), Modeling, and Computer Graphics, 21-23 June 2004, Novosibirsk, Akademgorodok, Russia. Tha main goal of the conference is to present up-to-date approaches and solutions in the area of PLM, computer graphics, and modeling - both in the market niche and research. Fixed link :: http://ledas.com/consulting/publications?pub=50

Preprint N11: (in English and Russian) TWO NEW DECOMPOSITION TECHNIQUES IN GEOMETRIC CONSTRAINT SOLVING A. Eremchenko, A. Ershov 02 Jun 2004 This preprint presents two new techniques for decomposition of geometric constraint problems, which are used in the LGS solver currently being developed by LEDAS, Ltd. The first technique is non-heuristic decomposition for two- and three-dimensional problems with geometric constraints. The second technique is an heuristic decomposition method for two- and three-dimensional problems con-taining both geometric and algebraic constraints. Fixed link :: http://ledas.com/consulting/publications?pub=11

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