DATABASE SYSTEMS (phần 11) pot

... 4710: Database Systems (Day 11) Page 5 Mark Llewellyn Why Third Normal Form? (cont.) flight day pilot-id pilot-name 112 Feb .11 317 Mark 112 Feb. 12 246 Kristi 114 Feb.13 317 Mark 112 Feb. 11 319 ... E (AD) a 1 b 12 b 13 a 4 b 15 (AB) a 1 a 2 b 13 a 4 b 25 (BE) b 31 a 2 a 3 a 4 a 5 (CDE) b 41 b 42 a 3 a 4 a 5 (AE) a 1 b 52 a 3 a 4 a 5 COP 4710: Database Systems (Day 11) Pag...

Ngày tải lên: 21/01/2014, 18:20

... by D = 1 2 ρV 2 SC D (7) 198 Advances in Flight Control Systems Pnl [E -F] Kout Kp gp Kin zp up v z r ξp ξr xp + - - + + + Fig. 4. Flight control system 0 ≤ t < t c1 : initial hovering phase t c1 ≤ t ... used for controller design. Letting ¯ x p (V), ¯ u p (V) be respectively the state and the input in trim where the flight 202 Advances in Flight Control Systems wh...

Ngày tải lên: 19/06/2014, 23:20

... the time response of this system at 304 Discrete Time Systems Discrete Time Systems 292 Therefore, a memoryless state-feedback gain is given by 1 1 [2.0 3.0]KFX − == . The closed-loop discrete- time ... yields ˆ x k+1 = ˆ A (α) ˆ x k + ˆ A d (α) ˆ x k−d k + ˆ B (α)u k , (83) 314 Discrete Time Systems Discrete Time Systems 290 Theorem 2: For a given set...

Ngày tải lên: 20/06/2014, 01:20

... multi -delay feedback systems with multi -delay driving signal, J. Phys. Soc. Jpn 74: 2374–2378. Ikeda, K. & Matsumoto, K. (1987). High-dimensional chaotic behavior in systems with time- delayed ... Synchronization of Multiple Time Delay Systems (arb. units) (arb. units) (arb. units) (a) Time series of x(t) and y(t) (arb. units) (arb. units) (b) Portrait of x(t + 4.6) versu...

Ngày tải lên: 20/06/2014, 07:20

... number of antennas is 4, a 4x4 matrix is needed. In our case, we use the following pilot matrix:                  111 1 111 1 111 1 111 1 P (4) where the number of rows represents ... wavelength measurement, Advances in Measurement Systems4 12 receiver for NLoS (Non Line of Sight) was situated in position 2, in the parking of the next building. Finally...

Ngày tải lên: 20/06/2014, 11:20

... smart home and healthcare technology Although individual cases of existing home retrofitting to smart homes may exist, there are few reports of systematic efforts made to convert to smart homes. ... smart home and healthcare technology Although individual cases of existing home retrofitting to smart homes may exist, there are few reports of systematic efforts made to con...

Ngày tải lên: 21/06/2014, 11:20

Ngày tải lên: 01/07/2014, 19:20

... concepts (see Chapter 24). • KR schemes include reasoning mechanisms that deduce additional facts from the facts stored in a database. Hence, whereas most current database systems are limited to ... relational database and a rela- tional database schema. A relational database schema S is a set of relation schemas S = (R I , R z , , R m } and a set of integrity constraints IC....

Ngày tải lên: 07/07/2014, 06:20

... discussing the role of information systems in organizations; database systems are looked upon as a part of information systems in large-scale applica- tions. We discussed how databases fit within an information ... and 11) discuss high level transaction design and joint analysis of data and functions. Shasha (1992) is an excellent source on database tuning. Information about some...

Ngày tải lên: 07/07/2014, 06:20

... (see Chapter 6). Practical Database Design and Tuning In this chapter, we first discuss the issues that arise in physical database design in Section 16.1. Then, we discuss how to improve database performance through database tuning in Section ... undertaking physical database design, we must have a good idea of the intended use of the database by defining the queries and transacti...

Ngày tải lên: 07/07/2014, 06:20

... in a database. Because part of the theoretical foundation for some deductive database systems is mathematical logic, such rules are often referred to as logic databases. Other types of systems, ... in the application programs that access the database. Section 24.3 will give a brief overview of spatial and multimedia databases. Spatial databases provide concepts for databases that kee...

Ngày tải lên: 07/07/2014, 06:20

... types of distributed database systems, including federated and multidatabase systems and highlights the problems of heterogeneity and the needs of autonomy in federated database systems, which will ... retrieve the employee 25.7 Distributed Databases in Oracle I831 Net8 Database server Database server Net8 (c:::>c:::>c:::> = EMPtable t- , , Sales , database CONNECT T...

Ngày tải lên: 07/07/2014, 06:20

... 262 sequence interaction, 263-264 database programming languages, 255 database schema, 27-28, 115 database servers, 36, 263 database state, 28 database systems active, 19 active database technology, 3 characteristics, 8-11 deductive, ... data, 902 database administrators (DBA), 12 interfaces for, 34 security and, 734 database applications, 49, 52-53, 255, 262 database desi...

Ngày tải lên: 07/07/2014, 06:20

... 308 11 .3 Minimizing I/O Cost versus Number of I/Os 309 11 .3 .1 Blocked I/O 310 11 .3.2 Double Buffering 311 11 .4 Using B+ Trees for Sorting 312 11 .4 .1 Clustered Index 312 11 .4.2 Unclustered Index 313 11 .5 ... Replication 611 21. 8 Distributed Catalog Management 611 21. 8 .1 Naming Objects 612 21. 8.2 Catalog Structure 612 21. 8.3 Distributed Data Independence 613 2...

Ngày tải lên: 08/08/2014, 18:22