نتایج جستجو برای: medium timber

تعداد نتایج: 244573  

1998
Jack Lutz

Timber price forecasts are important components of timberland investment analysis. Two techniques are widely used in forecasting. Econometric models use one or more independent variables to predict a dependent variable. Time series analysis or autoregression techniques use the prior observations of a variable, and only those prior observations, to make predictions of that variable. Either techn...

Journal: :Forests 2021

A batch of pine timber sawn from butt, middle and top logs was strength graded with the visual method (classification into grading classes KW—best quality, KS—medium KG—inferior quality Reject) machine method—performed use a mobile grader C classes). We compared efficiency classes, depending on type log which material obtained (butt, middle, top). Next, used to measure modulus elasticity in ben...

2005
Matthew H. Pelkki

Timber stumpage prices exhibit considerable volatility, which has a tremendous effect on the long-term returns associated with growing timber. Predicting trends in the market occupies a great deal of effort in forest economics research and practice. But what are the possible gains from having the ability to predict the future of timber stumpage markets? On the stand-level, forward-recursive dyn...

2010
Luca Caneparo

The paper presents the computer-aided design and construction of a large glued laminated timber structure in Aosta, Italy. The structure was completely computer modelled with in-house developed software, which considers both torsion and curvature constraints of timber. Further proprietary software was used to develop, on a plane, the shape of each timber layer without torsion and curvature . Th...

2005
D. Li T. Hong J. Yang

In this paper, Chi Lin Nunnery, the imitation of early Tang-Dynasty timber-structure building in Hong Kong, is used as an example to perform 3D model reconstruction and demonstrate the assembling process, as well as make a digital database of buildings. This paper gives an introduction to the features of ancient Chinese timber-structure buildings and also the workflow of 3D reconstruction of an...

2006
Dug Man Lee

The analysis of import tariffs on natural resource has been undertaken on the establishment of two modeling approaches for both nonrenewable resources and renewable resources. However, it is too hard to find the literature that analyzed the optimal tariffs on timber trade by modeling the biological characteristics of forest explicitly. This paper, hence, is designed to examine the dynamic struc...

Journal: :MCFNS 2010
Marc E. McDill

Asterisk indicates corresponding author (when not the first author). Locations indicated for first authors only. Mauricio Acuna, Cristian Palma, Wenbin Cui, David Martell *, Andres Weintraub Universidad de Chile, Santiago “Integrated timber harvest and fire management planning” Harvest planners often consider potential fire losses and timber production plans can influence fire management but mo...

2015
Ioakeim Tzoulis Zacharoula S. Andreopoulou Marios Trigkas Georgios Tsekouropoulos Elias Voulgaridis

In wood trade, the supplier is the forest and the product is round wood. The quality, the quantity and value of wood depend heavily on the practices that are applied in the early stages of the supply chain. Current methods of the the productive capacity of forests, the annual consumption of wood and wood products, both from natural and technical forests and also from imports are presented. The ...

2004
Gregory S. Amacher Erkki Koskela Markku Ollikainen

We propose a framework with endogenous allocation of land between agricultural production, sustainable forest management, and unsustainable forest exploitation in the form of illegal logging to explore deforestation and agricultural and timber supplies when property rights are insecure. Uncertainty over property rights arises through risk of confiscation on sustainably-managed forest land, and ...

Journal: :caspian journal of environmental sciences 2008
s. mohammadi limaei p. lohmander

dynamic game theory is applied to analyze the timber market in northern iran as a duopsony. the nash equilibrium and the dynamic properties of the system based on marginal adjustments are determined. when timber is sold, the different mills use mixed strategies to give sealed bids. it is found that the decision probability combination of the different mills follow a special form of attractor an...

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