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A Distributed Algorithm for Determining Minimal Covers of Acyclic Database Schemes

Journal of Computer Science & Technology 1994年第3期9卷 204-214页

作者：叶新铭 Department of Computer Science Inner Mongolia University Huhhot

Acyclic databases possess several desirable properties for their design and use. Adistributed algorithm is proposed for determining a minimal cover of an alpha-, beta-,gamma-, or Berge-acyclic database scheme over a s... 详细信息

关键词： alpha- beta- gamma- Berge-acyclic depth-first-search tree distributed algorithm minimal cover hypergraph

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CHANGES OF CATHEPSIN D AND α _2- MACROGLOBULIN IN RATS AFTER ACUTE TOTAL BODY IRRADIATION

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Nuclear Science and Techniques 1990年第3期1卷 187-192页

作者：金为翘陈识杰莫素珍范佩芳乐敏张皓李永河何介薇 Institute of Radiation Medicine Shanghai Medical University Shanghai 200032 China

α 2-macroglobulin (α2M) could stimulate the regeneration of thymic and bone marrow cells in rats received γ-irradiation, but there was very few reports concerning its mechanism. Wistar rats were irradiated by 16Co at 7 Gy, 8.5 Gy, 15 Gy total body doses. Blood plasma and some tissue’s extracts were collected α 2M level. a M activity and cathepsin D activity, malonaldehyde level were determined by radioimmunoassay, modified Schidlow’s method, Barrett’s method and Ohkawa’s method respectively.

关键词： alpha- 2- macroglobulin Cathepsin D Malonaldehyde Radiation Rat

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Domain of Euler Mean in the Space of Absolutely p-Summable Double Sequences with 0

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Analysis in Theory and Applications 2018年第3期34卷 241-252页

作者： Medine Yesilkayagil Feyzi Basar School of Applied Sciences Usak University1 Eylul Campus64200-UsakTurkey Professor Emeritus Faculty of EducationInonu UniversityMalatya 44280Turkey

In this study, as the domain of four dimensional Euler mean $E\left( {r,s} \right)$ of orders r,s in the space $\mathcal{{L}_p}$ for $0 < p < 1$, we examine the double sequence space $\mathcal{E}_p^{r,s}$ and some pro... 详细信息

In this study, as the domain of four dimensional Euler mean $E\left( {r,s} \right)$ of orders r,s in the space $\mathcal{{L}_p}$ for $0 alpha $-and $\beta \left( {bp} \right)$-duals of the space $\mathcal{E}_p^{r,s}$, and characterize the classes $\left( {\mathcal{E}_p^{r,s}:{\mathcal{M}_u}} \right)$, $\left( {\mathcal{E}_p^{r,s}:{\mathcal{C}_{bp}}} \right)$ and $\left( {\mathcal{E}_p^{r,s}:{\mathcal{L}_q}} \right)$ of four dimensional matrix transformations, where $1 \le q \le \infty $. Finally, we shortly emphasize on the Euler spaces of single and double sequences, and note some further suggestions.

关键词： Summability theory double sequences double series alpha- beta- and gammaduals matrix domain of 4-dimensional matrices matrix transformations

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The weighted quadratic index of biodiversity for pairs of species: a generalization of Rao’s index

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Natural Science 2011年第9期3卷 795-801页

作者： Radu Cornel Guiasu Silviu Guiasu 不详

The distribution of biodiversity at multiple sites of a region has been traditionally investigated through the additive partitioning of the regional biodiversity, called γ-diversity, into the average within-site biodiversity or α-diversity, and the biodiversity among sites, or β-diversity. The standard additive partitioning of diversity requires the use of a measure of diversity which is a concave function of the relative abundance of species, like the Shannon entropy or the Gini- Simpson index, for instance. When a phylogenetic distance between species is also taken into account, Rao’s quadratic index has been used as a measure of dissimilarity. Rao’s index, however, is not a concave function of the distribution of relative abundance of either individual species or pairs of species and, consequently, only some nonstandard additive partitionings of diversity have been given using this index. The objective of this paper is to show that the weighted quadratic index of biodiversity, a generalization of the weighted Gini-Simpson index to the pairs of species, is a concave function of the joint distribution of the relative abundance of pairs of species and, therefore, may be used in the standard additive partitioning of diversity instead of Rao’s index. The replication property of this new measure is also discussed.

关键词： Additive Partitioning of Biodiversity Biodiversity Measures Rao’s Index of Dissimilarity Replication Property Weighted alpha- Beta- and Gamma-Diversities Weighted Gini-Simpson Index

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