Báo cáo lâm nghiệp: "Viscoelastic behaviour of green wood across the grain Part II A temperature dependent constitutive model defined by inverse method" pot
Báo cáo lâm nghiệp: "Viscoelastic behaviour of green wood across the grain. Part II. A temperature dependent constitutive model defined by inverse method" pot
... one has to keep in mind that the number of parameters that may be identified from experi-mental data is limited by the quality and the parameter domain of the available data. The natural variability ... fit the behaviour of all remaining tests at higher temperature levels,including the 10 h long plateau at constant temperature. The parameter identification depicts a similar behaviour inradial ... any estimated set of elements parameters.This calculation simply uses the expression obtained in elasticity for a cantilever beam and the actual temperature and load of the beam ateach time....
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Báo cáo lâm nghiệp: " Viscoelastic behaviour of green wood across the grain. Part I. Thermally activated creep tests up to 120 °C" ppsx
... Experimental raw dataIn the paper published by P. Perré and O. Aguiar [19] all the creep tests had a plateau temperature at 120 °C. As a result, alltests have the same time -temperature itinerary. ... normalisedapparent MOE. Note also that final normalised values are sim-ilar for radial and tangential directions, whatever the plateau temperature. This observation confirms that the ratio of anisot-ropy ... the thermal inertia of the whole apparatusand will be utilised as the experimental temperature for all plots andfor the identification procedure (part II of this article). The first graph of...
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Báo cáo lâm nghiệp: "Historical development of floodplain forests in the Upper Moravian Vale (Vrapač National Nature Reserve, Czech Republic)" pot
... Primeval Age till the end of Middle Agesere are no direct data available for the analysis of the state of floodplain forests in the Vrapač area from the Neolithic Age till the end of Middle Ages. ... stream of the Morava River in the area of Vrapač. e recess of the Morava River into its own bed by means of the head erosion causes the upstream parts of the intermittent river arms to be ca ... arguably also at the river banks, an alluvial softwood forest was to be found, although only rarely (Salicion albae associa-tion). At the nearby village of Moravičany, there is a burial ground...
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Báo cáo lâm nghiệp: "Habitat distribution of dipterocarp species in the Leyte Cordillera: an indicator for species – site suitability in local reforestation programs" ppt
... malaanonan, Shorea palosapis,Shorea polysperma, and Vatica mangachapui can be classifiedas common and widespread. The species Hopea plagata,Hopea malibato, or Hopea philippinensis are locally ... commonHopea acuminata Merr. Manggachapui Manggachapui * ³ * ScatteredShorea palosapis (Blco.) Merr. Mayapis Philippine Mahogany - white lauan** ** ** ** CommonShorea assamica Dyer Manggasinoro Manggasinoro ... acuminata and Hopea philippinensis, whichshow a low frequency as well as a clustered occurrence, theirreal elevational potential cannot be given based on the availabledata. For Shorea assamica,...
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Báo cáo lâm nghiêp: "Modélisation de l’évaporation globale d’un couvert forestier II. - Calibrages et résultats du modèl" pps
... compte. D’après AussENAC (1980) la capacité maximale de saturationest supérieure dans ce cas. the parameters of the model, particularly the stomatal resistance function. The comparisonbetween ... evaluation of the final soilmoisture deficit towards its end.Then the use of the model s output data (actual evapotranspiration of the forest canopy, ratio of the soil water ... excess of that of the Douglas tree canopy. On the other hancd, because of their higher canopy storagecapacity, interception of rain by the Douglas tree is greater than the...
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Báo cáo lâm nghiệp: " Flight activity of Anthribus nebulosus Forster, 1770 (Coleoptera: Anthribidae) and notes to its life history" potx
... 1983).In this paper, we analyzed the flight activity of this species by means of the Malaise traps installed in several localities in 2005 and 2006, summarized data concerning occurrence of A. nebulosus ... Malaise traps in the Nízký Jeseník Hills, the flight activity started at the beginning of May and ended in mid-June with the peak at the end of May and beginning of June in 2005. In 2006, the ... listorozí Lamellicornia. Díl I. Lucanidae – roháčovití, Scarabaei-dae – vrubounovití. Pleurosticti. Praha, Nakladatelství Československé akademie věd: 287.BLAHUTIAK A. , 1998. Geografický aspekt a diverzita...
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Báo cáo lâm nghiệp: "Spatial distribution of four spruce bark beetles in north-western Slovakia" pps
... Section I, at the base of the stem (0.5–1.0 m above ground); II, midway between the base of the stem and the base of the crown; III, just below the base of the crown; IV, in the middle of the crown; ... beetle spots. In the culmination and retrogradation phases, outbreaks spread by further expansion from old spots. e same authors also indicated that in the first stage of the outbreak, the beetles ... IA is very abundant at those areas at all. Information about spatial distribution of bark beetles may suggest where to apply control measures against synergic attack of several bark beetles...
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Báo cáo lâm nghiệp: "Initial evaluation of half-sib progenies of Norway spruce using the best line" potx
... consists of a search through the entire range of parameter space and the computation of the log-likelihood for each parameter value across the range. e solu-tion is given by achieving the largest ... estimated, and third, they are the best in the sense of having the minimum mean square error within the class of all linear unbiased estimates (M 1996). βˆ and uˆ are calculated from the ... based on calculating the experimental variance as a function of distances and fitting these with theoretical models (J et al. 2002) or taking other covariables into the model (A , S...
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Báo cáo lâm nghiệp: "Complex study of foliage nutrient status in ash fertilized Scots pine stands in Lithuani" pptx
... to a treatmente graphical analysis was done to evaluate the nutrient status by examining the tree response to a treatment. e application of wood ash and N fertilizers increased the mass of ... monitoring and analysis of the effects of air pollution on forests. Part IIIa. Sampling and analyses of soil. Hamburg, Geneva, Programme Coordinat-ing Centre: 1–108.VAIČYS M., RAGUOTIS A. , ŠLEINYS ... changes in the data obtained 2 years after the application of neither wood ash nor N fertilizers (Table 2). e current and first year needles remained a ected by N fertilization, and the values...
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Báo cáo lâm nghiệp: "Value production of poplar clones'''' ppt
... structure of the assortments is composed of the quality and diameter classes of logs in accord-ance with the standard of the Slovakia STN 48 0056 for the qualitative classification of broadleaved ... prices of the assortments of raw timber and costs of logging ope-rations.Models of assortment yield tablesThey are in the form of mathematical models (P et al. 2008b) and they show the ... younger age than Robusta. For site indexes 20, 30 and 40 the yields of both clones are the same at the age of about 30, 20 and 17 years. Robusta reaches about 40–590 thousand SKK at the age of...
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