نتایج جستجو برای: colchicum speciosum steven
تعداد نتایج: 5252 فیلتر نتایج به سال:
i(1 − (−1)δ)Si · Si+1 by the density matrix renormalization group method recently proposed by Steven R. White (Phys. Rev. Lett. 69 (1993) 3844). We find a massless point at δc = 0.25 ± 0.01. We also find the edge states in the region δ < δc under the open boundary condition, which disappear in the region δ > δc. At the massless point, the spin wave velocity vs is 3.66 ± 0.10 and the central cha...
Applying surface fitting models to reconstruct 3-D objects with free-form features is widely employed from toy industry to medical surgery. However, reconstruction of free-form surfaces from range-image data always prone to intensive manual operations, and some technical skills are always needed. Recently, research focus on the studies of improving surface reconstruction results to achieve bett...
Background and purpose: The use of rangeland medicinal plants and their active ingredients have recently been considered due to their therapeutic and industrial use. The quantity and quality of active ingredients in plants are influenced by environmental factors and ecological stresses of the area. One of the most important factors in extracting the active ingredients of plants is solvent, the ...
We use Young tableaux and Young symmetrizers to classify the irreducible representations over C of the symmetric group on n letters, Sn. We establish an isomorphism between a ring of all representations of finite symmetric groups and the ring of symmetric functions, and, as a corollary, prove the Frobenius formula for the characters of representations of Sn. We use the theory thus developed to ...
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