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Author : Mukaram Yousif Mansour
Publisher :
ISBN 13 :
Total Pages : 172 pages
Book Rating : 4.:/5 (152 download)
Download or read book An Application of Non Linear Growth Models to Tree Volume Data written by Mukaram Yousif Mansour and published by . This book was released on 1986 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Gary L. Gadbury
Publisher :
ISBN 13 :
Total Pages : 20 pages
Book Rating : 4.:/5 (319 download)
Download or read book A Nonparametric Analysis of Plot Basal Area Growth Using Tree Based Models written by Gary L. Gadbury and published by . This book was released on 1998 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tree based statistical models can be used to investigate data structure and predict future observations. We used nonparametric and nonlinear models to reexamine the data sets on tree growth used by Bechtold et al. (1991) and Ruark et al. (1991). The growth data were collected by Forest Inventory and Analysis (FIA) teams from 1962 to 1972 (4th cycle) and 1972 to 1982 (5th cycle). We used tree based models to group observations into clusters that were specified by covariate values. Next, we performed a permutation test on the grouped data to test for a change in tree growth rates from the 4th cycle to the 5th cycle. Our techniques differed from those used by Bechtold et al. (1991) and Ruark et al. (1991). The data was not assumed to follow any parametric distribution, the relation between response and covariates was not assumed to be linear, and the test for a change in tree growth did not require any parametric assumptions. The methodology presented here is general and applicable to other situations where the significance of a specific covariate is in question. Despite these relaxed constraints of analysis, our results generally agreed with those of Bechtold et al. and Ruark et al.
Author :
Publisher : Nophea Sasaki
ISBN 13 : 4915870367
Total Pages : 285 pages
Book Rating : 4.9/5 (158 download)
Download or read book Forest Resource Management and Mathematical Modeling. FORMATH Vol. 7 written by and published by Nophea Sasaki. This book was released on with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : David A. Ratkowsky
Publisher :
ISBN 13 :
Total Pages : 296 pages
Book Rating : 4.:/5 (318 download)
Download or read book Nonlinear Regression Modeling written by David A. Ratkowsky and published by . This book was released on 1983 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction to regression models; Assessing nonlinearity in nonlinear regression models; Yield-density models; Sigmoidal growth models; Asymptotic regression model; Some miscellaneous models; Comparing parameter estimates from more than one data set; Obtaining good initial parameter estimates; Summary: towatd a unified approach to nonlinear regression modeling.
Author : David A. Hamilton
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.:/5 (319 download)
Download or read book Modeling the Probability of Individual Tree Mortality written by David A. Hamilton and published by . This book was released on 1976 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : John Scrivani
Publisher :
ISBN 13 :
Total Pages : 198 pages
Book Rating : 4.:/5 (138 download)
Download or read book Nonlinear Models of Height Growth for Douglas-fir in Southwestern Oregon written by John Scrivani and published by . This book was released on 1985 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: A review is made of methods which assess the bias and non-normality of parameter estimates and predictions obtained with nonlinear regression. Particular emphasis is placed upon curvature measures of nonlinearity, related measures of parameter and prediction bias, and the effects of reparameterizations. Alternate models of individual tree height growth are compared on the basis of mean square error, intrinsic nonlinearity, parameter effects nonlinearity, and estimated bias. While results are specific to the data examined, some general conclusions are made concerning appropriate models for individual tree height growth. Both the Richards and a Weibull-type growth model are found to adequately describe individual tree height growth, with low levels of intrinsic nonlinearity, and acceptable parameter effects nonlinearity following repararneterization. Some evidence is found for a modification of either the Richards or Weibull model to include an asymptotic linear growth rate when modeling the height growth of some western conifers past the age of 200. Stem analysis data on Douglas-fir height growth in mixed confier stands located in southwestern Oregon are used to develop a system of dominant height growth and site index prediction. The Weibull model is used successfully to develop a polymorphic height growth prediction equation. A linear model, estimated with site index as the dependent variable, is used to predict site index. A comparision is made of pooled least squares and random coefficient estimation methods. The random coefficient method is found to more closely model the shape of early height growth, but appears to result in more biased predictions and performs very poorly on older height growth, with both the estimation and validation data. Alternative error assumptions are examined with the pooled data method. The best performance in validation is obtained with assumption of independent errors, heteroscedastic across trees.
Author :
Publisher :
ISBN 13 :
Total Pages : 632 pages
Book Rating : 4.:/5 (31 download)
Download or read book General Technical Report Southern Research Station written by and published by . This book was released on 1995 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : J. K. Vanclay
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (78 download)
Download or read book Modelling Forest Growth and Yield written by J. K. Vanclay and published by . This book was released on 1994 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Whole stand models. Size class models. Single-tree and tree list models. Data Requirements. Constructing growth models. Forest site evaluation. Diameter increment. Mortality and merchantability. Regeneration and recruitment. Model evaluation and re-calibration. Implementation and use. Future directions.
Author : Raymond H. Myers
Publisher : Duxbury Resource Center
ISBN 13 : 9780534380168
Total Pages : 0 pages
Book Rating : 4.3/5 (81 download)
Download or read book Classical and Modern Regression with Applications written by Raymond H. Myers and published by Duxbury Resource Center. This book was released on 1990 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Regression analysis is a vitally important statistical tool, with major advancements made by both practical data analysts and statistical theorists. In CLASSICAL AND MODERN REGRESSION WITH APPLICATIONS, Second Edition, Raymond H. Myers provides a solid foundation in classical regression, while introducing modern techniques. Throughout the text, a broad spectrum of applications are included from the physical sciences, engineering, biology, management, and economics.
Author : Nova J. Silvy
Publisher : JHU Press
ISBN 13 : 1421436701
Total Pages : 1401 pages
Book Rating : 4.4/5 (214 download)
Download or read book The Wildlife Techniques Manual written by Nova J. Silvy and published by JHU Press. This book was released on 2020-07-28 with total page 1401 pages. Available in PDF, EPUB and Kindle. Book excerpt: The #1 selling wildlife management book for 40 years, now updated for the next generation of professionals and students. Since its original publication in 1960, The Wildlife Techniques Manual has remained the cornerstone text for the professional wildlife biologist. Now fully revised and updated, this eighth edition promises to be the most comprehensive resource on wildlife biology, conservation, and management for years to come. Superbly edited by Nova J. Silvy and published in association with The Wildlife Society, the 50 authoritative chapters included in this work provide a full synthesis of methods used in the field and laboratory. Chapter authors, all leading wildlife professionals, explain and critique traditional and new methodologies and offer thorough discussions of a wide range of relevant topics. To effectively incorporate the explosion of new information in the wildlife profession, this latest edition is logically organized into a 2-volume set: Volume 1 is devoted to research techniques and Volume 2 focuses on pragmatic management methodologies. Volume 1 describes research design and proper analytic methods prior to conducting research, as well as methods and considerations for capturing and handling wild animals and information on identification and marking of captured animals. It also includes new chapters on nutritional research and field sign identification, and on emerging topics, including structured decision-making. Finally, Volume 1 addresses measurements of wildlife abundance and habitat and research on individual animals. Volume 2 begins with a section on the relationship between research and management including public outreach, described in a context that encourages engagement prior to initiation of management. An adaptive management approach is described as a cornerstone of natural resource management, followed by a section on managing landscapes and wildlife populations. The volume also includes new chapters on ethics in wildlife science and conservation, conflict resolution and management, and land reclamation. A standard text in a variety of courses, the Techniques Manual, as it is commonly called, covers every aspect of modern wildlife management and provides practical information for applying the hundreds of methods described in its pages. This deft and thorough update ensures that The Wildlife Techniques Manual will remain an indispensable resource, one that professionals and students in wildlife biology, conservation, and management simply cannot do without.
Author : Andrew P. Robinson
Publisher : Springer Science & Business Media
ISBN 13 : 1441977627
Total Pages : 342 pages
Book Rating : 4.4/5 (419 download)
Download or read book Forest Analytics with R written by Andrew P. Robinson and published by Springer Science & Business Media. This book was released on 2010-11-05 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: Forest Analytics with R combines practical, down-to-earth forestry data analysis and solutions to real forest management challenges with state-of-the-art statistical and data-handling functionality. The authors adopt a problem-driven approach, in which statistical and mathematical tools are introduced in the context of the forestry problem that they can help to resolve. All the tools are introduced in the context of real forestry datasets, which provide compelling examples of practical applications. The modeling challenges covered within the book include imputation and interpolation for spatial data, fitting probability density functions to tree measurement data using maximum likelihood, fitting allometric functions using both linear and non-linear least-squares regression, and fitting growth models using both linear and non-linear mixed-effects modeling. The coverage also includes deploying and using forest growth models written in compiled languages, analysis of natural resources and forestry inventory data, and forest estate planning and optimization using linear programming. The book would be ideal for a one-semester class in forest biometrics or applied statistics for natural resources management. The text assumes no programming background, some introductory statistics, and very basic applied mathematics.
Author : Marie Davidian
Publisher : Routledge
ISBN 13 : 1351428152
Total Pages : 360 pages
Book Rating : 4.3/5 (514 download)
Download or read book Nonlinear Models for Repeated Measurement Data written by Marie Davidian and published by Routledge. This book was released on 2017-11-01 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nonlinear measurement data arise in a wide variety of biological and biomedical applications, such as longitudinal clinical trials, studies of drug kinetics and growth, and the analysis of assay and laboratory data. Nonlinear Models for Repeated Measurement Data provides the first unified development of methods and models for data of this type, with a detailed treatment of inference for the nonlinear mixed effects and its extensions. A particular strength of the book is the inclusion of several detailed case studies from the areas of population pharmacokinetics and pharmacodynamics, immunoassay and bioassay development and the analysis of growth curves.
Author : Richard M. Teck
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 (31 download)
Download or read book Individual-tree Diameter Growth Model for Northeastern United States written by Richard M. Teck and published by . This book was released on 1991 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: S2Describes a species-specific, distance-independent individual-tree diameter growth model for the Northeastern United States. Diameter growth is predicted in two steps using a two parameter, sigmoidal growth function modified by a one parameter exponential decay function with species-specific coefficients. Coefficients are presented for 28 species groups. The model accounts for variability in annual diameter growth due to species, tree size, site quality, and the tree's competitive position within the stand. Model performance is evaluated using the mean predicted error and the root mean square error. Results are presented for the calibration data and an independent validation data set. The model has been, incorporated into NE-TWIGS, a computerized forest growth model for the Northeastern United States.S3.
Author :
Publisher :
ISBN 13 :
Total Pages : 234 pages
Book Rating : 4.E/5 ( download)
Download or read book Proceedings RMRS. written by and published by . This book was released on 1998 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 384 pages
Book Rating : 4.F/5 ( download)
Download or read book Second Forest Vegetation Simulator Conference written by and published by . This book was released on 2002 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Patricia M. Irving
Publisher :
ISBN 13 :
Total Pages : 276 pages
Book Rating : 4.:/5 (319 download)
Download or read book Acidic Deposition written by Patricia M. Irving and published by . This book was released on 1991 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: A summary of the twenty-seven State-of-Science and State-of-Technology (SOS/T) Reports published in 1990 by the National Acid Precipitation Assessment Program. Cf. Pref.; p. 3.
Author :
Publisher :
ISBN 13 :
Total Pages : 924 pages
Book Rating : 4.3/5 (91 download)
Download or read book General Technical Report INT written by and published by . This book was released on 1986 with total page 924 pages. Available in PDF, EPUB and Kindle. Book excerpt:
