Báo cáo lâm nghiệp: "Study of the properties of thirteen tro

Báo cáo lâm nghiệp: "Study of the properties of thirteen tropical wood species to improve the prediction of cutting forces in mode B" pptx

... to estimate cutting forces during wood machining, a factor remains difficult to take into consideration: the influence of wood species. Therefore, the aim of this study is to understand the influence ... estimating cutting forces involved during machining, particularly with difficulties in taking the influence of wood species into account accurately (wit...

Ngày tải lên : 08/08/2014, 01:22

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Báo cáo lâm nghiệp: "Study of natural hybridization between Alnus incana (L.) Moench. and Alnus glutinosa (L.) Gaertn" pptx

... sporadically in the area and very rarely in the zone of continuous distribution of the species. Some increase in fre- quency of hybridization is noted by the northern boundary of the species areas, ... data, in Central Siberian Botanical Garden, SB RAS (Novosibirsk, Russia) the end of ﬂowering of A. incana falls as usual on the beginning of ﬂowering...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Reconstructing crown shape from stem diameter and tree position to supply light models. I. Algorithms and comparison of light simulations" doc

... meas- urements. In this study, we tested the possibility of connecting a detailed light model to a crown reconstruction model and to using the crown model to supply the required individual crown data to the ... is one of the eight radii Ri (i from 1 to 8, in solid lines ( )), describing the projection of the crown in the horizontal plane passing through p...

Ngày tải lên : 08/08/2014, 00:22

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Báo cáo lâm nghiệp: "Molecular markers provide evidence for long-distance planting material transfer during plantation establishment of Dalbergia sissoo Roxb. in Nepal" pot

... different origin of this plantation as compared to the others. The intro- duction of material with different origin increased the total variation of cpDNA found in plantations. The observation of differentiation ... variation pat- terns in natural populations. Further studies involving material from other regions of the species distribution may allow to gain addit...

Ngày tải lên : 08/08/2014, 01:22

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báo cáo hóa học: " TCP NCE: A unified solution for non-congestion events to improve the performance of TCP over wireless networks" docx

... value of cwnd. When the sender receives new ack including the value stored in the varaible Recover, the sender sets the size of cwnd to the value of ssthresh and then goes to CA phase. On the other ... throughput of the ith flow (0 <i ≤ N) normalized to the total achievable throughput in the link and N is equal to total number of flows sharing the...

Ngày tải lên : 21/06/2014, 02:20

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Báo cáo lâm nghiệp: "Multivariate statistical approach to comparison of the nutrient status of Norway spruce (Picea abies [L.] Karst.) and top-soil properties in differently managed forest stands" potx

... Diﬀerences in the properties of the particular sampling points and the fact that the in uence of soil heterogeneity on the speciﬁcity of forest stand cannot be fully neglected complicate the interpretation ... used to evaluate the closeness of the nutrient status of the spruce stands and to assess the closeness of chemical properties of the...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Comparison of the impact of blue spruce and reed Calamagrostis villosa on forest soil chemical properties" pot

... primarily. After the air pollution induced decay of forest stands in the mountain regions of the Czech Re- public in 1970s to 1990s, there was a problem of autochthonous tree species planting failure on the ... 1998. e in uence of selected factors on the biomass production of the Calamagrostis arundinacea species in the conditions of submountain beec...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: " Selected physical properties of initial soils on the outside spoil bank of the Bełchatów brown coal mine" pot

... an increase in the percentage of macropores in the initial humus horizon (AinCan) of the investigated soils. The content of easily and very easily available (EUR) water was the highest in the ... in uence on the processes of forma- tion of initial soils, and therefore on the quality of forest sites coming into being (S 1958). e purpose of the...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Results of a phenological study of the tree layer of a mixed stand in the region of the Drahanská vrchovina Upland" ppt

... and the beginning of foliage became evident in all monitored species most mark- edly. Because of a rapid increase in temperatures in May 2006, the duration of the stage of the beginning of ... onset of the stage of budbreak and the beginning of foliage in monitored species slightly fell behind compared to previous years. Eﬀects of temperature on...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: " A contribution to the properties of combined plywood materials" ppsx

... and tougher than the sum of the values of their parts (H, K 2005). At the end of the 70s and at the beginning of the 80s of the 20 th century, the principle of plywood allowed the ... consists in the loading of a sample that is suspended on two supports whereas the sin- gle loading interacts in the middle of sample (Figs. 4 and 5). D...

Ngày tải lên : 07/08/2014, 04:20

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