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1
Content available remote Tensor Framework and Combined Symmetry for Hypertext Mining
100%
Saha S. , Murthy C. A. , Pal S. K.
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tom Vol. 97, nr 1/2
215-234
EN
We have made a case here for utilizing tensor framework for hypertext mining. Tensor is a generalization of vector and tensor framework discussed here is a generalization of vector space model which is widely used in the information retrieval and web mining literature. Most hypertext documents have an inherent internal tag structure and external link structure that render the desirable use of multidimensional representations such as those offered by tensor objects. We have focused on the advantages of Tensor Space Model, in which documents are represented using sixth-order tensors. We have exploited the local-structure and neighborhood recommendation encapsulated by the proposed representation. We have defined a similarity measure for tensor objects corresponding to hypertext documents, and evaluated the proposed measure for mining tasks. The superior performance of the proposed methodology for clustering and classification tasks of hypertext documents have been demonstrated here. The experiment using different types of similarity measure in the different components of hypertext documents provides the main advantage of the proposed model. It has been shown theoretically that, the computational complexity of an algorithm performing on tensor framework using tensor similarity measure as distance is at most the computational complexity of the same algorithmperforming on vector space model using vector similarity measure as distance.
2
Content available Effect of the type of aging after supersaturating on hardness and AW-7020 stop structure
75%
Abramczyk N. , Żuk D.
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2018
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tom Vol. 25, No. 3
9--16
EN
Effect of the type of aging after supersaturating on hardness and AW-7020 stop structure
3
Content available remote Symulacja numeryczna ruchu cząstek w płynach magnetycznych
75%
Barski M.
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tom R. 106, z. 3-M
3-21
PL
Tematem niniejszego artykułu jest komputerowa symulacja zachowania się cząstek magnetycznych w cieczy magnetoreologicznej poddanej działaniu zewnętrznego pola magnetycznego. Opisano tutaj możliwie najprostszy model teoretyczny płynu magnetycznego. Wykorzystując ten model, badano wpływ zróżnicowanej wielkości cząstek na ich ostateczny rozkład w płynie nośnym. W sytuacji, gdy wszystkie cząstki mają identyczny promień, struktura wewnętrzna składa się z izolowanych, regularnych łańcuchów, ułożonych równolegle do kierunku wektora natężenia zewnętrznego pola magnetycznego. Kształt struktury wewnętrznej, uzyskany przy założeniu różnej wielkości cząstek, jest zasadniczo różny.
EN
This article is devoted to a numerical simulation of magneto-rheological fluids behavior under external magnetic field. The most simplest theoretical model of magnetic fluid is described. Using this model, the influence of magnetic particle size on internal structure is investigated. in the case, when all particles have the same size and shape, the obtained internal structure consists of single isolated strings of particles. The direction of these strings is parallel to the direction of external magnetic field. As the size of magnetic particles is variable, the shape of internal structure is completely different and the strings form clusters.
4
Content available Efficiency of different forest types in carbon storage depends on their internal structure
75%
Gheorghe I. F. , Biris I. A. , Valcu C.-M.
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nr 4
EN
Forest vegetation is a key factor in the maintenance of global carbon cycle balance under the present climate change conditions. Forest ecosystems are both buffers against extreme climatic events accompanying climate change and carbon sinks diminishing the environmental impact of anthropogenic greenhouse gas emissions. We investigated the influence of stand structure and site characteristics on the productivity and carbon storage capacity of temperate forest types. Predictors of species productivity were parameters such as stand density, age, height, average diameter and wood density. Morus alba (L.) was more productive than average both in terms of annual volume increment and annual biomass gain, while Quercus sessiliflora (Matt.) Lieb. and Quercus frainetto (Ten.) were significantly less productive than average. Differences in stand productivity were explained by stand density, age, height, altitude, type of regeneration and species composition. Statistically significant differences were measured between the productivity of stands dominated by different woody species, with low productive stands dominated by slow growing species with high wood density like Quercus or Fagus, and highly productive stands rich in fast growing species with low wood density like Populus or Salix. Stands with different plant communities in the underlying herbaceous layer also tended to have different levels of productivity.
5
Content available Multiple impact effects of wheat grain
75%
Slipek Z. , Zlobecki A.
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nr 2
6
Content available Compression of berry-like cell between two plates - role of internal stress
63%
Blahovec J. , Posva J.
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nr 2
7
Content available Rapeseed storage and their mechanical strength
63%
Tys J. , Szwed G.
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nr 2
8
New method of texture measurement of crisp food and feed
63%
Rzedzicki Z.
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nr 4
9
Content available The ultrastructure, development, and systematic position of the graptolite genus Mastigograptus
51%
Bates D. E. B. , Urbanek A.
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nr 3
EN
Fragments of rhabdosomes isolated by chemical treatment from an erratic boulder of Baltic origin and ?Middle Ordovician age, provisionally assigned to Mastigograptus aff. tenuiramosus (Wallcott, 1881) were studied with SEM. Although exceptionally well preserved, remains lack the thin−walled free portions of thecae. Rhabdosomes are provided with a strongly developed basal disc, short stem and many branched stipes. The latter consist of heavily corticalized chains of stolothecae with alternately disposed thecal bases. Stolothecae display a morphological gradient and increase in size and change in shape distalwards. The stolon system studied with SEM on naturally and artificially broken specimens, as well as traced through open thecal bases, reveals a regular triad budding but no stolon inside the stolothecal cavity. We tentatively suggest that crassal lining, recognized earlier by TEM studies, corresponds to an unusually inflated stolonal stolon, filling the entire thecal cavity and adhering tightly to stolothecal wall. The systematic position of Mastigograptus, a matter of long debate, seems to be defined by a number of structural features which imply a distinct difference between genus in question and all known orders of sessile graptolites. The order Mastigograptida nov. and the family Mastigograptidae nov. are proposed.
10
Standaryzacja metod pomiaru wlasciwosci fizyczno-mechanicznych roslinnych materialow ziarnistych
32%
Fraczek J. , Kaczorowski J. , Slipek Z. , Horabik J. , Molenda M.
Acta Agrophysica. Rozprawy i Monografie
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2003
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nr 92
1-160
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