Báo cáo lâm nghiệp: "A comparison of fitting techniques for ponderosa pine height-age models in British Columbia" potx

... ×+= φωε+×+ 609 Ann. For. Sci. 61 (2004) 609–615 © INRA, EDP Sciences, 2004 DOI: 10.1051/forest:2004064 Original article A comparison of fitting techniques for ponderosa pine height-age models in British ... as that for model (5). Therefore, I recommend the use of model (4) for estimating the height of ponderosa pine in British Columbia. The models cann...

Ngày tải lên: 08/08/2014, 01:22

... NEP of Figure 5, in the temperate zone an increase in NPP is offset by a larger increase in Rs and in the Mediterranean zone a fairly large increase in NPP is heavily offset by the increase in ... exchange can be approached in a number of ways. Penman et al. [14] have described methods for preparing annual inventories of changes in stocks of carbon in forests in...

Ngày tải lên: 08/08/2014, 00:22

... longleaf pine stands, respecti- vely. In fact, the evolution of dominant diameter in control (unthinned) and thinned plots was checked, observing a slight increment in this variable in thinned plots. ... normally defined for this species: coast and interior. The effect of thinning was examined; however, no benefits were obtained by introducing an additional thinning response v...

Ngày tải lên: 08/08/2014, 00:22

... dates, again dispersed over the whole season, using a 5-stage scale (1 – green leaves, 2 – beginning of autumn colouring of individual leaves, 3 – beginning of autumn leaf colouring on a ... their values for the positions of individual trees were estimated by ordinary point kriging. The evaluation of phenotypic variation (height, diameter, Julian days of spring flushing...

Ngày tải lên: 07/08/2014, 10:21

... pollutants originating esp. from lignite mining, processing and burning and from oil refineries. In Middle Ages a centre of ore mining and processing. 11 Český les (Bohemian Forest) 14 Novohradské ... 4). Cadmium In the case of cadmium, evident higher pol- lution is detected in the area of the Jablunkov Pass in comparison with the remaining area of NFR. e spatial distin...

Ngày tải lên: 07/08/2014, 10:21

... the system providing information for decision-making [13, 29]. According to García [14], the basic elements of these types of models are: a description of the forest state at a given point in time; ... to take into account the effect of site index in modelling natural mortality e.g. [2, 31], but all of them can be included in the general form that has been employed in...

Ngày tải lên: 08/08/2014, 01:21

... and forest habitat type, For. Sci. 30 (1984) 943–965. [23] Mörling T., Evaluation of annual ring width and ring density deve- lopment following fertilisation and thinning of Scots pine, Ann. For. ... J.D., Dominant height growth models and site index cur- ves for site-prepared Slash pine plantations in the lower coastal plain of Georgia and North Florida, M.S. thesis, Univer...

Ngày tải lên: 08/08/2014, 01:22

... Proceedings of the fourth SIGHAN bakeoff. Fei Wu and Daniel S. Weld. 2010. Open information extraction using Wikipedia. In Proceedings of the 48th Annual Meet- ing of the Association for Computational ... Association for Computational Linguistics. Li Zhuang, Feng Jing, and Xiao-Yan Zhu. 2006. Movie re- view mining and summarization. In Proceedings of the 15th ACM international...

Ngày tải lên: 23/03/2014, 14:20

... algorithms includ- ing naive Bayes, SVM, and C4.5 decision tree in the pres- ence and absence of feature selection techniques to address the problem of modeling in CFS. Accounting for models is ... or "control") of data instances in the testing set, given only the assigned features (that is, the SNP information of the subjects). Given a training set of instance...

Ngày tải lên: 18/06/2014, 15:20

... stocking of birch stands and that the number of injured plants decreases with the increasing stand density (K 2007). e smoothing of total heights and increments of underplanting in the ... agreement of increments either in the case of identical total height with all plants included in the comparison or in the case of comparing only plants without the injured...

Ngày tải lên: 07/08/2014, 03:22