Báo cáo lâm nghiệp: "A two-step mortality model for even-aged stands of Pinus radiata D Don in Galicia (Northwestern Spain)" doc

Báo cáo lâm nghiệp: "A two-step mortality model for even-aged stands of Pinus radiata D. Don in Galicia (Northwestern Spain)" doc

... mor-tality model for even-aged stands of Pinus radiata includingcompetition-induced mortality (regular mortality) and non-competition-induced mortality (irregular mortality) by relating mortality ... A two-step mortality model for even-aged Pinus radiata stands in Galicia (Northwestern Spain) is presented. The model was deve-loped using data from two inventories of a trial network involving ... 10.1051/forest:2004037Original articleA two-step mortality model for even-aged stands of Pinus radiata D. Don in Galicia (Northwestern Spain) Juan Gabriel ÁLVAREZ GONZÁLEZa*, Fernando CASTEDO DORADOb,...

Báo cáo lâm nghiệp: "A ﬁre probability model for forest stands in Catalonia (north east Spain)" pot

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Báo cáo lâm nghiệp: "A fire probability model for forest stands in Catalonia (north-east Spain)" pptx

... which destroyedtogether almost 30000 ha of Pinus nigra stands [4, 5]. The dif-ference between the predicted and observed fire probabilities in stands dominated by Pinus pinaster and Pinus pinea ... AND METHODS2.1. Inventory plotsThe modelling data comprised inventory data of forest stands, onone hand, and fire occurrence data, on the other hand. The data on for- est stands were obtained ... forest stands in Catalonia pre-sented in this study opens many possibilities to integrate the risk of fire into forest management planning and decision-making.The parameters included in the model...

Báo cáo lâm nghiệp:"A height-diameter model for Pinus radiata D. Don in Galicia (Northwest Spain)" docx

... [10], in spite of this model was used to estimate the height of individual trees in a growth model for Pinus radiata in New Zealand.The values of the statistics of the models included in thegroup ... collected during two inventories of 182 permanent plots of radiata pine (Pinus radiata D. Don) situated throughout Galicia, in the Northwest of Spain. Comparison of the models was carried out by studying ... estimates. Pinus radiata D. Don / forest modelling / Galicia / height-diameter relationshipRésumé – Un modèle hauteur-diamètre pour Pinus radiata D. Don en Galice (nord-ouest de l’Espagne). Vingt-six...

Báo cáo lâm nghiệp: "A digital photographic method for 3D reconstruction of standing tree shape" ppt

... the coordinates of the left and right hand edges of the stem cross-section measured on photo 1, and Yl, Yr are the coordinates of leftand right hand edges measured on photo 2.Using the 3D proﬁle, ... position of the standing trees. The disadvantages of thismethod are that a minimum of three targets per log must beattached to the stem of standing trees, and considerable timeis required for the ... photographicmeasurements did not necessarily coincide, there may be con-siderable diﬀerences between methods for the two orthogonaldiameters.4. CONCLUSIONS For the range of stand densities and tree sizes examined,...

Báo cáo lâm nghiệp: "A fractal root model applied for estimating the root biomass and architecture in two tropical legume tree species" pps

... general mean ± SD of q was 0.86 ± 0.148.The values of α and q did not depend on link order or diameter in our study nor in [23].The model of West et al. has been applied for scaling rootbiomass ... angles independently of the form and density of the angle dis-tribution, and no fitting of a theoretical distribution to data is necessary.Full application of the model of West et al. [27] would ... field data for calculating standarddeviations when the E. lanceolata data was divided by pruningTable II. Selected root architecture characteristics of Erythrina lanceolata and Gliricidia sepium.Characteristic...

Báo cáo lâm nghiệp: "Growth and yield model for uneven-aged mixtures of Pinus sylvestris L. and Pinus nigra Arn. in Catalonia, north-east Spain" pptx

... such as dominant height, stand age and siteindex used in even-aged models are not directly applicable touneven-aged stands [27]. The age of individual trees of an une-ven-aged stand is often ... significant in the final version of the models.Another version of the models was prepared using species dummiesas additional predictors.2.4. Ingrowth modellingA linear model predicting the number of ... height model, an ingrowth model and a survival model for uneven-agedmixtures of Pinus sylvestris L. and Pinus nigra Arn. in Catalonia (north-east Spain) were developed. Separate models were developed...

Báo cáo khoa học: "A Unified Statistical Model for the Identification of English BaseNP" pptx

... Unified Statistical Model for the Identification of EnglishBaseNPEndong XunMicrosoft Research ChinaNo. 49 Zhichun Road Haidian District100080, China,i-edxun@microsoft.comMing ZhouMicrosoft ... of ourstatistical model on various size of the trainingdata, x-coordinate denotes the size of thetraining set, where "1" indicates that the trainingset is from section 0-8th of ... theperformances of both baseNP identification andPOS tagging.Correspondingly, the algorithm is composed of two steps: determining the N-best POS taggingusing Equation (2). And then determining...

Báo cáo lâm nghiệp: "Research on individual parameters for cutting power of woodcutting process by circular saws" docx

... suppression of friction on the back and leading surfaces against the machined surface.Defining the value of individual parts of force F is quite difficult and depends on many aspects. e part of force ... deformation of a mass in the surroundings of a cutting edge,– forces necessary for deflection of chips and sup-pression of chip friction against the leading edge of the tooth,– forces necessary for ... results of the torque Mk at dif-ferent cutting-edge side rakes of circular saws with cemented carbide plates and circular saws made of high-speed steel in different types of wood we deduced the...

Báo cáo lâm nghiệp: "Genetic variation and genotype by environment interactions of juvenile wood chemical properties in Pinus taeda " pps

... grosseur du grain / lignine1. INTRODUCTIONGenetic improvement and intensive silviculture of loblollypine (Pinus taeda L.) have increased forest plantation produc-tivity signiﬁcantly in the ... analysesJuvenile wood and transition wood were compared for microwood traits using the paired t-tests. A general linear mixed model wasﬁtted to data to estimate variance components for combined sites.y ... ge-netic analyses were carried out using a general linear mixed model and implementing with the SAS Mixed procedure [16]. Using vari-ance components from the mixed model, individual-tree (h2i), half-sibfamily...

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