Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 28 for “"Single Tree"”.
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Tree-based Methods for Learning Probability Distributions
… and mainly discussed herein are two types of new tree-based methods: a single-tree method and an ensemble method. The new single tree method, the main topic of Chapter 2, is introduced by constructing a generalized Polya tree process, that is, a new Bayesian nonparametric model, equipped with a …
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Turning up the heat: fire ecology and climate adaptive silviculture in longleaf pine forests
… frequent fire, yet persists as both patches and single tree regeneration. While research has shown that this regeneration within patches alters fuel composition, specific changes of fuel loads, and subsequent alterations of fire behaviour and fire effect is unknown. Results indicate that patches …
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An Analogical Garden of Memory
… of the city. It centers around a singular tree, informed by a specific childhood memory. The single tree in concert with the architectural conditions allows one to resist the inexorable rush of urban time.
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The Influence of Overstory Structure on Understory Light Availability in a Longleaf Pine (Pinus palustris Mill.) Forest
… uncut treatment and three harvest treatments: single tree, small gap (0.1 ha), and large gap (0.2 ha). Each harvest retained similar residual basal area but with different spatial patterns of the residuals, ranging from uniformly dispersed (single tree) to different degrees of aggregation …
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Systematics of the spider genera Mallos and Mexitilia (Arameae: Dictynidae)
… characters were combined they produced a single tree that was identical to that based on molecular data alone. These molecular and morphological characters present the same picture of Mallos and Mexitilia phylogeny.
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Novel Methods based on the Fusion of Multisensor Remote Sensing Data for Accurate Forest Parameter Estimation
… of the forest at stand, sub-stand or individual tree level. This calls for the need of developing techniques tailored on such new data that can achieve accurate forest parameters estimations. Moreover, in this context the integration of multiple remote sensing data brings to a more comprehensive …
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Reliable peer-to peer multicast streaming
… own challenges and problems such as churn. In tree topology frequent joining and leaving of users in search for better quality and reliable streaming makes the P2P network instable. This thesis provides an effective approach to achieve a resilient network for streaming. Relying on a single tree …
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Chestnut (Castanea spp.) cultivar evaluation for commercial chestnut production in Hamilton County, Tennessee
… W elevation 230 meters. In 2003 and 2004, 534 trees were planted, representing 64 different cultivars, varieties, and species. Twenty trees from each of 20 different cultivars were planted as five-tree plots in a randomized complete block design in four blocks of 100 trees each, amounting to …
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Sistemática filogenética dos primatas do novo mundo e a evolução do aparelho mastigatório (Platyrrhini, Primates)
… The analysis yielded 40 equally parsimonious trees (289 steps, CI = 0.48 and RI = 0.67). Howevre, after using the successive weighting option, the reanalysis os the same data matrix resulted on a single tree (889 steps, CI = 72 and RI= 85) that was considered the major result of the Thesis. …
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Effects of soil nutrient availability on the development of tropical monodominance and subordinate species composition in montane forests
… in the world, natural areas occur where a single tree species dominates the forest stand. The presence of these monodominant forests therefore represents an unusual and intriguing phenomenon. Several studies over the past 30 years have attempted to explain how monodominance arises and how …
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Spatial, temporal and dendrochronological comparisons of mercury in Ontario deciduous trees
… attention. This study focuses on the role of trees as a source and/or sink of Hg to the environment and the ap- plicability of deciduous trees as biomonitors for Hg. Leaf, bark and wood core samples were taken from a variety of deciduous species including Acer spp. (sugar, silver and red …
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Phytoforensics: Applications in vapor intrusion assessment
… and temporally and spatially variability. Trees are ideal candidates for environmental biomonitors because they are ubiquitous, active samplers of vapor and groundwater and because they are thought to sample over large spatial and temporal scales, effectively averaging variability. Sampling …
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Habitat Relationships of Breeding Birds in Bottomland Hardwood Forests of the Altamaha River, Georgia
… preferred stations with less variability in tree diameter and more shrubs. My study illustrates the significance of the Altamaha River bottomlands for the conservation of a diverse assemblage of breeding birds, including numerous Neotropical migratory species of regional conservation concern. …
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Systems Pharmacology – Machine Learning Approaches in Profiling Oncology Drug Candidates
… Artificial neural nets (ANN), and Decision trees – classification and regression tree (CART) and multi-tree majority voting ensemble techniques i.e., random forest and XGBoost.The feature sets for building these models were extracted by computing chemical fingerprints and quantum chemical …
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Applications of ecological modeling in managing Central Appalachian upland oak stands for old-growth characteristics
… into old-growth. These manipulations included single-tree selection, herbicide application, culling larger diameter stems and planting seedlings where required. Individual trees within each of the younger, managed stands were removed at various time intervals and these simulated stands were …
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How Does Vegetation Movement During Laser Scanning Affect Common Point Cloud-Derived Metrics? A Virtual Laser Scanning Study
… laser scanning point clouds of small apple trees. To this end, we use virtual laser scanning of synthetic trees with different levels of animated leaf flutter. Height metrics, voxel metrics, geometric features, and leaf area are calculated from the simulated single-tree laser scanning point …
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Optimal trees for prediction and prescription
For the past 30 years, decision tree methods have been one of the most widely-used approaches in machine learning across industry and academia, due in large part to their interpretability. However, this interpretability comes at a price--the performance of classical decision tree methods is …
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Diagnosis of Loblolly Pine (Pinus taeda L.) Nutrient Deficiencies by Foliar Methods
… nutrients in individual stands. This study used single-tree fertilization with macro-nutrients (N, P, K, Ca, Mg, S) and micro-nutrients (Mn, Zn, B, Cu, Fe, Mo) to identify deficiencies using foliar techniques in one growing season. Four study sites in TX, AL, GA, and SC were established in …
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Response of uneven-aged in interior Douglas-fir stands to precommercial thinning in central interior, British Columbia
… Analyses were performed at both the stand and tree level. The growth of basal area per ha, quadratic mean dbh, volume per ha and Lorey’s height were used for stand level analyses. At the tree level, dbh, height, basal area and volume were the variables of interest. At the stand level, mortality …
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Analysis of forest areas by advanced remote sensing systems based on hyperspectral and LIDAR data
… forest attributes such as species composition, trees stem volume, height, etc. Hyperspectral and LIDAR remote sensing data can provide useful information to the identification of these attributes: hyperspectral data with their dense sampling of the spectral signatures are important for the …
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