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Bo Einarsson's Accuracy and Reliability in Scientific Computing (Software, PDF

By Bo Einarsson

ISBN-10: 0898715849

ISBN-13: 9780898715842

Numerical software program is used to check medical theories, layout airplanes and bridges, function production traces, keep watch over strength vegetation and refineries, research monetary derivatives, establish genomes, and supply the certainty essential to derive and research melanoma remedies. due to the excessive stakes concerned, it truly is crucial that effects computed utilizing software program be exact, trustworthy, and strong. regrettably, constructing exact and trustworthy medical software program is notoriously tough. This ebook investigates a few of the problems relating to medical computing and offers perception into tips on how to conquer them and procure accountable effects. The instruments to evaluate latest medical purposes are defined, and a number of innovations that may increase the accuracy and reliability of newly built functions is mentioned. Accuracy and Reliability in medical Computing may be thought of a guide for bettering the standard of medical computing. it is going to support desktop scientists tackle the issues that have an effect on software program normally in addition to the actual demanding situations of numerical computation: approximations taking place in any respect degrees, non-stop capabilities changed by means of discretized types, limitless strategies changed through finite ones, and actual numbers changed by way of finite precision numbers. Divided into 3 elements, it begins by way of illustrating a few of the problems in generating powerful and trustworthy clinical software program. famous circumstances of failure are reviewed and the what and why of numerical computations are thought of. the second one part describes diagnostic instruments that may be used to evaluate the accuracy and reliability of present medical purposes. within the final part, the authors describe a number of ideas that may be hired to enhance the accuracy and reliability of newly constructed clinical functions. The authors of the person chapters are overseas specialists, lots of them participants of the IFIP operating workforce on Numerical software program. Accuracy and Reliability in clinical Computing comprises condensed details at the major positive aspects of six significant programming languages — Ada, C, C++, Fortran, Java, and Python — and the INTLAB toolbox of the MATLABâ software program and definitely the right toolbox of Fortran are mentioned intimately. This ebook has an accompanying web site,, with codes, hyperlinks, colour models of a few illustrations, and extra fabric. The booklet can be of curiosity to any scientist, engineer, or physicist who desires to increase the reliability and accuracy of computed effects, specifically whilst the computations are severe or huge. it will likely be of curiosity to practitioners who use numerical software program for actual purposes and wish to prevent power problems.

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Extra info for Accuracy and Reliability in Scientific Computing (Software, Environments, Tools)

Sample text

2 IEEE floating-point representation The IEEE 754 [226] contains single, extended single, double, and extended double precision. It became an IEEE standard [215] in 1985 and an IEC6 standard in 1989. There is an excellent discussion in the book [355]. In the following subsections the format for the different precisions are given, but the standard includes much more than these formats. It requires correctly rounded operations (add, subtract, multiply, divide, remainder, and square root) as well as correctly rounded format conversion.

The book [440] also provides a list of common bugs in the implementation of software. We summarize them in the following list. • Memory or resource leaks. A memory leak occurs when memory is allocated but not deallocated when it is no longer required. It can cause the memory associated with long-running programs to grow in size to the point that they overwhelm existing memory. Memory leaks can occur in any programming language and are sometimes caused by programming errors. • Logic errors. A logic error occurs when a program is syntactically correct but does not perform according to the specification.

Robust software will either use stable methods or notify the user when the input is outside the region of guaranteed stability. 2 for examples. 6 Methods of Verification and Validation In this section we summarize some of the techniques that are used in the verification and validation of scientific software. Many of these are well known in the field of software engineering; see [6] and [440], for example. Others are specialized to the unique needs of scientific software; see [383] for a more complete presentation.

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Accuracy and Reliability in Scientific Computing (Software, Environments, Tools) by Bo Einarsson

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