On database query languages for K-relations pdf

... get a full relational algebra on K-relations. Hence, our goal is twofold. On one hand, we define more expressive query languages for K-relations that extend RA + K with operations on annotated tuples ... query language, denoted by RA + K , similar to the classical positive relational algebra, allows for the querying of K-relations. In this paper, we define more expressive q...

Ngày tải lên: 16/03/2014, 16:20

Ngày tải lên: 27/02/2014, 07:20

... show how to compute a query over streams. We will focus on monotonic functions as they are the only continuous queries supported on data streams. Every monotonic function F on an input data stream ... streams, since difference is antimonotonic on its second argu- ment. The previous notions lead to natural generaliza- tions for selection, projection and union; suitable generalizatio...

Ngày tải lên: 23/03/2014, 12:20

... condition for AH algebras (and therefore, a fortiori for ASH algebras), one obtains counterexamples to the Elliott conjecture of a particularly forceful nature, so that slow dimension growth is connected ... Aut(B)/Inn(B) is a monomorphism, and, for each g ∈ S ∞ , ι(g) acts trivially on each F ∈F R . The information which goes undetected by F R is thus complicated indeed. ON THE CLA...

Ngày tải lên: 16/02/2014, 06:20

... activation. Initial Backbone chemistry siRNA sequence End features Key Fig. 1. Design considerations for controlling nonspecific responses to siRNA. This figure summarizes known recognition interactions between ... delivery method on immune activation. Finally, we provide suggestions for conduct- ing appropriate controls for siRNA experiments, because some commonly employed strategies d...

Ngày tải lên: 06/03/2014, 01:23

... respect of Works Contracts, or Contracts for purchases valued between Rupees one lakh to Rupees ten lakhs, where General Conditions 24 of Contract (GCC), Special Conditions of Contract (SCC) ... performed a part of the contract and has undergone expenses in arranging to fulfill the contract it is necessary for the parties to agree to a reasonable value of the work done as considera...

Ngày tải lên: 07/03/2014, 08:20

... 1981. [8] J. Boulos, Y. Vi´emont, and K. Ono. Analytical Models and Neural Networks for Query Cost Evaluation. In Proc. 3rd In- ternational Workshop on Next Generation Information Tech- nology Systems, ... distributed query optimization based on load conditions. In Sixth In- ternational Conference on Management of Data (COMAD), 1994. [19] M. N. Garofalakis and Y. E. Ioannidis. Par...

Ngày tải lên: 07/03/2014, 14:20

... PM www.it-ebooks.info Table of Contents xxi Chapter 3: Formulas and Functions for Crunching Numbers . . . . . . .425 How Formulas Work 425 Referring to cells in formulas 425 Referring to formula results in formulas ... applications You’re smart — and frugal. You don’t want to pay for stuff you don’t need, so the Home and Student edition of Office is perfect for you. But you DO want to...

Ngày tải lên: 15/03/2014, 20:20

... especially ap- pealing for SMT on low-resource languages. Most of the research on alignment combination in the past has focused on how to combine the alignments from two different directions, source- to-target ... outper- forms the baseline alignment, with signif- icantly higher F-scores and better transla- tion performance. 1 Introduction Word alignment usually serves as the starti...

Ngày tải lên: 23/03/2014, 16:20

... background concentration of ozone, the analyses presented here are only based upon situations where 8-hour mean ozone concentrations exceed 35 parts per billion (ppb), which corresponds to an ozone ... (PM2.5) Health (ozone) Forest acidification Ecosystem acidification Freshwater acidification Eutrophication Forest damage (ozone) Current legislation Further improvement The level of ambiti...

Ngày tải lên: 29/03/2014, 14:20