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# Topic: Robust

###### In the News (Wed 19 Sep 18)

 Robust - Wikipedia, the free encyclopedia Robustness is an important characteristic of the internet because network design is a key factor in the availability of data. Robust e-mail allows a company to convert most of their communications from paper to electronic. A robust statistical test is one that performs well even if its assumptions are violated by the true model from which the data were generated. en.wikipedia.org /wiki/Robust   (375 words)

 Robust statistics - Wikipedia, the free encyclopedia Robust statistics seeks to provide methods that emulate classical methods, but which are not unduly affected by outliers or other small departures from model assumptions. Robust parameteric statistics tends to rely on replacing the normal distribution in classical methods with the t-distribution with low degrees of freedom (high kurtosis; degrees of freedom between 4 and 6 have often been found to be useful in practice) or with a mixture of two or more distributions. Robust statistical methods, of which the trimmed mean is a simple example, seek to outperform classical statistical methods in the presence of outliers, or, more generally, when underlying parametric assumptions are not quite correct. en.wikipedia.org /wiki/Robust_statistics   (2721 words)

 Robust regression - Wikipedia, the free encyclopedia In robust statistics, robust regression is a form of regression analysis designed to circumvent the limitations of traditional parametric and non-parametric methods. One instance in which robust estimation should be considered is when there is a strong suspicion of heteroskedasticity. Because the least squares estimates are dragged towards the outliers, and because the variance of the estimates is artificially inflated, the result is that outliers are masked (and in many situations, including some areas of geostatistics and medical statistics, it is precisely the outliers that are of interest). en.wikipedia.org /wiki/Robust_regression   (1630 words)

 Robust Gabions and Mattresses by Thai Wiring System Co., Ltd.   (Site not responding. Last check: 2007-09-20) ROBUST gabion boxes and mattresses can be used as abutments and protective structure that aid the flow of water avoiding the danger of erosion due to their good permeability characteristics. ROBUST is laid and straightened on the ground for assembly. ROBUST is arranged in order to form boxes and are connected/tied using galvanized steel wire or PVC coated steel wire lacing. www.robustgabion.com /main2.shtml   (414 words)

 [No title] The ROBUST command allows panel data models which are not rectangular to be estimated by use of an identifier variable that may be a character variable. The ROBUST command allows saving of the estimated coefficients, e'e, number of observations, R**2, largest residual and sum of absolute values of residuals in a DMF file along with an identifier variable. The ROBUST command is a special case of the REG command designed to explore alternative estimators. tigger.uic.edu /~hhstokes/hhstokes/help/robust.txt   (2068 words)

 Robust Decisions - Decision Management Training and Services   (Site not responding. Last check: 2007-09-20) A robust decision is one that comes as close as possible to satisfying all of the viewpoints. The robustness of any decision and the risk incurred in making that decision is only as good as the estimates on which it is based. A robust decision is the best possible choice, one found by eliminating all the uncertainty possible within available resources, and then choosing an alternative with known and acceptable satisfaction and risk. www.robustdecisions.com /newsletter.html   (709 words)

 Robust Redhorse Conservation Committee The Robust Redhorse Conservation Committee is a voluntary stakeholder partnership charged with the overall responsibility for directing the recovery of the robust redhorse (Moxostoma robustum). The robust redhorse is a large, long-lived member of the redhorse sucker family. A Conservation Strategy for the Robust Redhorse that provides overall conservation guidance to assure the continued survival of the species was adopted by the RRCC in 1998 and updated in 2003. www.robustredhorse.com   (1504 words)

 Robust Intra-document Locations By robust, we mean that one should be able to make an intra-document reference to a location within an arbitrary resource, save this description, and then re-establish the location in the future, after a document has undergone some class of mutations. Robust locations relies on the presumption of a document object model against which location descriptors are interpreted. Suppose that matching a tree walk of a robust location against the actual runtime tree fails at the exact saved offset (that is, that the walk is matched successfully up to the leaf, but that the leave is of the wrong type, or that the index of the media element is invalid). www9.org /w9cdrom/312/312.html   (6389 words)

 Liberalism, Socialism, and Robust Political Economy   (Site not responding. Last check: 2007-09-20) Robust political economy requires that both the assumptions of agent benevolence and omniscience be relaxed so that both incentive issues and knowledge problems can be adequately addressed. Robust political economy requires that both the assumptions of benevolence and omniscience be relaxed so that both incentive issues and knowledge problems can be adequately addressed. From the standpoint of robustness, however, that the incentive issue was unavailable to Mises and Hayek for criticism was a boon to the liberal cause. www.acton.org /publicat/m_and_m/new/article.php?article=5   (4101 words)

 Robust Redhorse Conservation Committee: Gallery of Photographs and Images   (Site not responding. Last check: 2007-09-20) This female robust redhorse was captured from the Savannah River near Augusta, Georgia on June 6, 2000. The robust redhorse may be easily misidentified as a closely-related species. Another distinctive feature of the robust redhorse is its large molariform pharyngeal teeth used to crush the shells of bivalues such as the asiatic clam (Corbicula) a main food source for adults. www.robustredhorse.com /h/photos.html   (156 words)

 Robust Hyperlinks and Locations Note that TF is considered only as a robustness heuristic, in that repeated words are assumed to be less likely to all be deleted, but only up to a point. We check that a walk is valid by checking each node name, which is redundantly recorded in a robust location; for media indices, the general algorithm only checks that the indexed element can be found, after which control is passed to a medium-specific model that may have its own robustness methods. Robust hyperlinks and robust locations are examples of the "permissive, but robust" approach to distributed systems. www.dlib.org /dlib/july00/wilensky/07wilensky.html   (4854 words)

 Definition of robust The word robust, when used with regard to computer software, refers to an operating system or other program that performs well not only under ordinary conditions but also under unusual conditions that stress its designers' assumptions. This is in large part because programs are usually too big and too complicated for a single human mind to comprehend in their entirety, and thus it is difficult for their developers to be able to discover and eliminate all the errors, or to even be certain as to what extent of errors exist. Robustness is something that should be designed into software from the ground up; it is not something that can be successfully tacked on at a later date. www.bellevuelinux.org /robust.html   (624 words)

 Optimum robust testing in linear models, Christine Müller Robust tests for linear models are derived via Wald-type tests that are based on asymptotically linear estimators. For a robustness criterion, the maximum asymptotic bias of the level of the test for distributions in a shrinking contamination neighborhood is used. Robust tests of inequality constraints and one-sided hy potheses in the linear model. projecteuclid.org /Dienst/UI/1.0/Summarize/euclid.aos/1024691091   (602 words)

 Robust Control, Dr. Taghirad E-course Gholampour, Robust position control of hydraulic robotic shoulder, In the Proceedings of the 12th International Conference on Electrical Engineering, May 2004, Mashad. H.D. Taghirad and P.R. Belanger, Intelligent torque sensing and robust torque control of harmonic drive under free-motion, In Proceedings of the IEEE International Conference on Robotics and Automation, 2:1749-54, April 1997. H.D. Taghirad and P.R. Belanger, Robust torque control of harmonic drive under constrained-motion, In Proceedings of the IEEE International Conference on Robotics and Automation, 1:248-253, April 1997. saba.kntu.ac.ir /eecd/ecourses/robust.htm   (596 words)

 amsup.com - Robust Engineering Robust Technology Development is a corporate strategy which enables organizations to reduce existing product development cycles by as much as two-thirds. It utilizes the Robust Design system to create generic, proprietary, new knowledge that can be applied to families of future products. Robust Technology Development bridges the gap between R&D, invention and innovation, and product/process development. www.amsup.com /robust_engineering/index.htm   (109 words)

 Robust Regression Encyclopedia Article @ aNewLow.com (A New Low)   (Site not responding. Last check: 2007-09-20) In the 1980s, several alternatives to M-estimation were proposed as attempts to overcome the lack of resistance. Least median of squares and least trimmed squares both appeared to be viable alternatives. An alternative parametric approach is to assume that the residuals follow a mixture of normal distributions; in particular, a contaminated normal distribution in which the majority of observations are from a specified normal distribution, but a small proportion are from a normal distribution with much higher variance. anewlow.com /encyclopedia/Robust_regression   (1516 words)

 FAQ: Advantages of the robust variance estimator The robust variance estimator is robust to the assumptions (1) and (2). The robust variance estimator estimates V(b) such that nominal (1 − alpha) confidence intervals constructed from it have B in the interval about (1 − alpha) of the time if one was to repeatedly resample from this population. The robust variance estimator produces correct variance estimates V(b*) for b* in the same sense discussed above: nominal (1 − alpha) confidence intervals constructed from it have B* in the interval about (1 − alpha) of the time if one were to repeatedly resample from this population. www.stata.com /support/faqs/stat/robust_var.html   (1229 words)

 Human Ancestors Hall: The Robust Debate The word "robust" originally referred to the larger body that the members of these two species were supposed, by paleoanthropologists, to have had. Few postcranial bones existed at the time for either, and inferences were based on the size of their teeth. Yet, because of the extreme heavy chewing adaptations of the "robust" forms, it is thought that they represent a group of species (or clade) separate from that which led to modern humans, and eventually this clade became extinct. www.mnh.si.edu /anthro/humanorigins/ha/robust.html   (487 words)

 amsup.com - Robust Design The Robust Design approach is based on an Energy Transformation model for egineering systems (mechanical, electrical, chemical, etc.). This unique approach to achieving Quality Assurance and Robustness during the design phase utilizes identification of the Ideal Function of a product or process, as opposed to traditional methods which focus on "symptom analysis" as a basis for improvement. the major driving forces behind robust engineering are-and each is equal-designing to satisfy clients in all...conditions; manufacturing processes and capabilities, cost, quality, and reliability. www.amsup.com /robust_design/index.htm   (510 words)

 Robust Statistics   (Site not responding. Last check: 2007-09-20) Vandewalle, B., Beirlant, J., Christmann, A., Hubert, M. (2005), A robust estimator for the tail index of Pareto-type distributions, submitted. Vandewalle, B., Beirlant, J., Hubert, M. (2004), A robust estimator of the tail index based on an exponential regression model, Theory and Applications of Recent Robust Methods, edited by M. Hubert, G. Pison, A. Struyf and S. Van Aelst, Series: Statistics for Industry and Technology, Birkhauser, Basel, 367-376. More related papers on robust statistics can be found on the Homepage of the Antwerp Group on Robust and Applied Statistics. wis.kuleuven.be /stat/robust.html   (1453 words)

 A Brief Overview of Robust Statistics Robust statistics have recently emerged as a family of theories and techniques for estimating the parameters of a parametric model while dealing with deviations from idealized assumptions [ And when the amount of noise is less than the assumed level, it will lack efficiency, i.e., the parameter estimates suffer in terms of accuracy, since not all the good data points are taken into account. In general, it is best for a robust estimator to use as many of the good samples of a distribution as possible, in order to maintain a good efficiency. www.louisville.edu /~o0nasr01/Websites/tutorials/RobustStatistics/RobustStatistics.html   (2741 words)

 Robust Analysis of Visual Data High breakdown point robust estimators in statistics tolerate up to fifty percent of the data points not obeying the same model. In image analysis, however, the data is often complex and several instances of a model are simultaneously present, each accounting for a relative small percentage of the data points. Only robust methods designed with the special nature of the visual data in mind can achieve satisfactory results. www.caip.rutgers.edu /riul/research/robust.html   (588 words)

 Robust Programming Robust programming, also called bomb-proof programming, is a style of programming that prevents abnormal termination or unexpected actions. Robust programming is defensive, and the defensive nature protects the program not only from those who use your routine but also from yourself. The above routines are robust, because they cannot be crashed by poor or incorrect calls, or inconsistency in the caller. nob.cs.ucdavis.edu /~bishop/secprog/robust.html   (5964 words)

 Robust Gabions and Mattresses by Thai Wiring System Co., Ltd. - Robust, Gabions, Mattresses, erosion control, ...   (Site not responding. Last check: 2007-09-20) ROBUST has the configuration to withstand higher stresses that is made of double-twisted hexagonal metallic-coated wire over coated with polyvinyl chloride (PVC). ROBUST has sufficient elasticity to permit elongation of the mesh equivalent to a minimum of 10% of the length of the section of mesh without reducing the diameter or tensile strength of the individual wires. ROBUST is fabricated in the manner required resulting in a strong, serviceable product having substantially uniform openings. www.robustgabion.com   (249 words)

 Robust UK for secure steel door systems for acoustic, fire control, retail, warehousing, health, education, ... Robust UK for secure steel door systems for acoustic, fire control, retail, warehousing, health, education, recreational and transport application We are based in Cheadle, Staffordshire and have a full range of steel door systems aimed predominantly at the industrial door and security door markets. We currently carry stock doors in a range of sizes to suit most standard new build projects, retrofit or replacement work can be accommodated by modifying stock doorsets or by custom manufactured doors made to order from the main factory in Sweden. www.robust-uk.com   (95 words)

 Robust Ghostpipefish, Solenostomus cyanopterus A Robust Ghostpipefish at Kurnell, New South Wales. A 90mm long Robust Ghostpipefish collected during Australian Museum fieldwork at a depth of 6m between South Head and Lady Jane Beach, Sydney Harbour, March 1998 (AMS I.38734-001). The Robust Ghostpipefish lives in marine waters of the Indian and western Pacific Oceans. www.amonline.net.au /fishes/fishfacts/fish/scyanop.htm   (277 words)

 Robust Technologies Inc. Robust Technologies Inc. is a software provider specialized in investment performance measurement and attribution. Our robust and innovative performance application will satisfy the most advanced investment management firms and our pricing schedule will accommodate smaller firms with simpler requirements. What differentiates us from our competitors is not only our innovative performance measurement and attribution methodologies that handle perfectly multi-currency derivative products in addition to conventional securities but also the ease of implementation, flexibility and usability of our product and capacity to process large amounts of portfolios from end-to-end at a lightning pace. www.robusttechnologies.com   (310 words)

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