MauveDB: Supporting Model-based User Views in Database Systems pptx
MauveDB: Supporting Model-based User Views in Database Systems pptx
... integrates statistical models into database systems by providing a new abstraction called model-based views. Model-based views further the classic notion of “data independence” by insulat- ing the users from the ... SAC, 2005. [38] Y. Yao and J. Gehrke. Query processing in sensor networks. In CIDR, 2003. MauveDB: Supporting Model-based User Views in Database Syst...
Ngày tải lên: 30/03/2014, 13:20
An Analysis of Geometric Modeling in Database Systems docx
... Phrases: Engineering database systems, geometric modeling, object-oriented database systems INTRODUCTION Motivation The last few years have shown a rapid increase in the use of robots in mechanical ... engineering database systems investigated in the remainder of this section. 3.1 The (Pure) Relational Database Systems In the introduction to this paper we cited a f...
Ngày tải lên: 07/03/2014, 23:20
Progressive Skyline Computation in Database Systems potx
... dominance checking, which can be expen- sive if the skyline contains numerous points. In order to speed up this process we insert the skyline points found in a main-memory R-tree. Continuing ... Skyline Computation in Database Systems • 59 Fig. 10. Incremental skyline maintenance for insertion. Fig. 11. Incremental skyline maintenance for deletion. skyline (of the whole dataset). I...
Ngày tải lên: 23/03/2014, 16:21
The Case for Determinism in Database Systems doc
... that minimizing superfluous context switches (i.e. avoiding prematurely scheduling threads blocked on mul- tiple contentions) is key to maintaining acceptable perfor- mance in deterministic systems ... shifting between execution models presents an intriguing future avenue of research. 3. THE CASE FOR NONDETERMINISM Before making the case for disallowing nondeterministic behavior in data...
Ngày tải lên: 30/03/2014, 13:20
Expressing and Optimizing Sequence Queries in Database Systems pdf
... determines how far the pattern should be advanced in the input, and ACM Transactions on Database Systems, Vol. 29, No. 2, June 2004. Expressing and Optimizing Sequence Queries in Database Systems • 295 —next( ... zero. ACM Transactions on Database Systems, Vol. 29, No. 2, June 2004. Expressing and Optimizing Sequence Queries in Database Systems REZA SADRI Procom Technology...
Ngày tải lên: 30/03/2014, 22:20
Tài liệu Power Electronic Control in Electrical Systems pptx
... central half of the line. If the compensator can vary its admittance continuously in such a way as to maintain V m E, then in the steady state the line is sectioned into two independent halves ... synchronous machines also have an important compensating effect in a power system. By dynam- ically maintaining constant voltage at the generator terminals they remove the The  venin equiva...
Ngày tải lên: 16/02/2014, 20:20
ADVANCES IN EXPERT SYSTEMS pptx
... Point to Point discharges in insulating oil: these PDs are related to insulation defects be‐ tween two adjacent turns in the winding of a transformer; • Point to Point discharges in insulating ... points in the winding insulation and the grounded parts of the transformer tank, but in the presence of gases dissolved in insulating oil; • Discharges caused by particles: in this cas...
Ngày tải lên: 05/03/2014, 21:21
Disorder in Physical Systems pptx
... For hypercubic lattices, the critical points, T c (d), are given by d-fold integrals over the basic lattice generating function which can be reduced to a sin- gle integral involving the dimensio nality, d, ... dynamic and computer intensive of all the areas of statistical endeavour; building upon models used originally in the description of physical systems and borrowing and improving upo...
Ngày tải lên: 28/03/2014, 10:20
Robust Cross-Layer Scheduling Design in Multi-user Multi-antenna Wireless Systems
... transmit power. Increasing the number of users and the incoming traffic loading (of delay sensitive users) will both result in a higher minimum power requirement. For example, increasing the user numbers ... reaches the minimum power level P min required to satisfy all users rate constraint (constraint C3 in Eqn. 6.10). Step 3 - Redistribution of the remaining power by adjusting µ usin...
Ngày tải lên: 20/11/2012, 11:36
Inclusion of new types in relational database systems
... integer, floating point number, char- acter string) and built -in operators (e.g. +, -, *, /) were motivated by the needs of business data processing applications. However, in many engineering applications ... For example, in a geographic application a user typically wants points, lines, line groups and polygons as basic data types and operators which include intersection, distance and...
Ngày tải lên: 22/10/2013, 10:15