Báo cáo toán học: "Dry matter and nitrogen allocation in western redcedar, western hemlock, a" ppsx

... production and survival in the field. High N concentrations in seedlings may lead to Original article Dry matter and nitrogen allocation in western redcedar, western hemlock, and ... balance and organic acids in western redcedar, western hemlock, and Douglas fir seedlings grown in low- and high-N soils, Can. J. For. Res. 29...

Ngày tải lên: 08/08/2014, 14:21

... contrasted with that obtained for the same date from leaves that fell during shedding: 0.68%, the con- tents in the leaves decreasing in favour of an increase in nitrogen in branches and bark for the ... the highest IR index was found at the beginning of autumn and the lowest in spring. Accordingly, the periods showing the highest percent- ages of N may be intimately correlate...

Ngày tải lên: 08/08/2014, 14:21

Ngày tải lên: 05/08/2014, 15:21

... other hand, bearing in mind that µ and ν are in the interior of the same Weyl chamber C,andwµ = µ + and wν = ν + are dominant, we may use Proposition 4.4 to compare the ranks of x(µ)andx(ν) in the ... , including the cross section X and the subspace V .Moreover,V also carries a standard ordering relative to the root system Φ; however, these two “standard” orderings of V coincide:...

Ngày tải lên: 07/08/2014, 08:22

... 4-cycle containing both v 1 and v 2 or containing both v 3 and v 4 . Proof. Suppose, to the contrary, that there is a 4-cycle containing both v 1 and v 2 or containing both v 3 and v 4 . By symmetry, ... H v contains an edge {v 1 ,v 2 ,v 5 } containing v 1 and v 2 ,and an edge {v 3 ,v 4 ,v 5 } containing v 3 and v 4 . Since the edges N(v i ), 1 ≤ i ≤ 4, are deleted from H G when...

Ngày tải lên: 07/08/2014, 13:21

... k-dominating set of G if the distance between each vertex u ∈ V − D and D is at most k (and D induces a connected graph in G). The minimum cardinality of a (connected) distance k-dominating set in ... the minimum cardinality taken over all maximal k-irredundant sets of vertices of G. In 1975, Meir and Moon [10] introduced the concept of a k-dominating set (called a ‘k-covering’ in...

Ngày tải lên: 07/08/2014, 15:22

... maximal independent set and that in every graph, γ(G) ≤ i(G) ≤ β(G) where γ(G) and i(G) are respectively the minimum cardinality of a dominating set and of an independent dominating set and β(G) ... Hedetniemi and S. T. Hedetniemi, Alliances in graphs, JCMCC 48 (2004), 157-177. [7] N. Linial, D. Peleg, Y. Rabinovich and M. Saks, Sphere packing and local majorities in graph...

Ngày tải lên: 07/08/2014, 21:20

... topologically indistinguishable in ||G||, so our choice will not matter for the continuity of σ. The proof that σ is continuous is still straightforward. Following these lines and imitating the proo ... ny arc in |G| with on e endpoint in X and one in Y contains an edge from F . 4 Euler tours In this section we prove Theorem 1.3, but before we do so let us consider an example...

Ngày tải lên: 07/08/2014, 21:21

... of the embedding factor w ′ = 343 which has embedding index 5, and the two 2’s of u are in po sitions 6 and 7. Note that we obtain ordinary factor order by taking P to be an antichain. Also, we will ... “weakly increasing” and “maximum” have their usual meanings. Also, let w +m be the result of applying the + operator m times. By using the previous lemma a nd induction, we obtain the...

Ngày tải lên: 08/08/2014, 01:20

... Lelarge. Diffusion of innovations on random networks: Understanding the chasm. In Proceedings of WINE 2 008, pages 178–185, 2008. [20] M. Molloy and B. Reed. A critical point for random graphs with ... decreasing when θ = d − 1 and has only one minimum point when θ < d − 1 (see [4] f or details). Thus for θ < d − 1, the only local minimum point is the global minimum point ˆy with P...

Ngày tải lên: 08/08/2014, 12:22