منابع مشابه
BAB-a New Ecommerce Mode in China
Information service business becomes the predominant industry in 21st century, and eCommerce which has become the focus that all countries and large corporation compete for is being improved and perfected ceaselessly. Since China is very different from the west in social structure and culture characteristic, B2B develops slowly in China [1,2]. In order to extend ecommerce more smoothly and succ...
متن کاملThe Membership Problem for 〈 a , b : bab 2 = ab 〉
Throughout, P is the semigroup presentation 〈a, b: bab = ab〉 for the semigroup S1. Lallement and Rosaz, [5], have shown that the semigroups Sk having presentations 〈a, b: b(ab)b = ab〉 are residually finite. They also find normal forms for elements of Sk . Specialized to k = 1, every element of S1 is either a power of a or else it can be represented uniquely by a word in one of the forms aba or ...
متن کاملComparison of A-block polydispersity effects on BAB triblock and AB diblock copolymer melts.
Recent experiments on triblock copolymer melts suggest that polydispersity effects are dramatically enhanced when polydisperse blocks are constrained by both ends to the internal interfaces of an ordered morphology. To quantify the relevance of architecture, we compare BAB triblock and AB diblock copolymer melts with polydisperse A blocks and monodisperse B blocks, using self-consistent field t...
متن کاملHelicobacter pylori bab characterization in clinical isolates from Bhutan, Myanmar, Nepal and Bangladesh
BACKGROUND Helicobacter pylori BabA is an important outer membrane protein that involves in the attachment to the gastric mucosa and enhances the virulence property of the bacterium. This study was aimed to characterize the bab genotypes, to evaluate its association with cagA, vacA and clinical diseases as well as degree of gastric inflammation. METHODS H. pylori isolates from four countries ...
متن کاملSingle-ion BAB triblock copolymers as highly efficient electrolytes for lithium-metal batteries.
Electrochemical energy storage is one of the main societal challenges of this century. The performances of classical lithium-ion technology based on liquid electrolytes have made great advances in the past two decades, but the intrinsic instability of liquid electrolytes results in safety issues. Solid polymer electrolytes would be a perfect solution to those safety issues, miniaturization and ...
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ژورنال
عنوان ژورنال: Encyclopédie berbère
سال: 1991
ISSN: 1015-7344,2262-7197
DOI: 10.4000/encyclopedieberbere.1239