Relational decompositions

Xem 1-15 trên 15 kết quả Relational decompositions
  • Relation Decomposition and Insufficiency of Normal Forms (cont.): Attribute preservation condition: Each attribute in R will appear in at least one relation schema Ri in the decomposition so that no attributes are “lost”. Another goal of decomposition is to have each individual relation Ri in the decomposition D be in BCNF or 3NF. Additional properties of decomposition are needed to prevent from generating spurious tuples

    ppt66p thienthanoze 12-11-2012 34 5   Download

  • Chapter 11 present the contents: Designing a set of relations, properties of relational decompositions, algorithms for relational database schema, multivalued dependencies and fourth normal form, join dependencies and fifth normal form, inclusion dependencies, other dependencies and normal forms.

    pdf43p kiepnaybinhyen_04 15-12-2015 6 1   Download

  • Chapter 11 present the contents: Designing a set of relations, properties of relational decompositions, algorithms for relational database schema, multivalued dependencies and fourth normal form, join dependencies and fifth normal form, inclusion dependencies, other dependencies and normal forms.

    pdf8p kiepnaybinhyen_02 29-12-2015 1 1   Download

  • In this chapter you will learn: Features of good relational design, atomic domains and first normal form, decomposition using functional dependencies, functional dependency theory, algorithms for functional dependencies, decomposition using multivalued dependencies, more normal form, database­design process, modeling temporal data.

    pdf87p allbymyself_06 24-01-2016 7 1   Download

  • Introduction: The chemical warfare agents well known count only about 30 kinds of compounds, such as sarin, soman, tabun, VX, mustard gas, lewisite and others. When unknown toxic substances should be analyzed upon the occurrence of chemical terrorism, much more kinds of poisons and related compounds become the objects of analysis. In the Chemical Weapons Convention (CWC)a, 120 thousand compoundsb, including typical chemical warfare agents, their related compounds, precursors and decomposition products, are being listed to be controlled.

    pdf22p bigbaby87 01-09-2010 66 16   Download

  • The typical method used in training and testing assessment conducted in this task will be considered and are as follows. Training in object recognition is often related to the training of an experiment. In the case of object recognition memory, as a measure to declare memory, acquisition is said to occur less exposure to the stimulus is learning / more acceptable in the absence of declared memory (eg a procedure for memory skills). Training in object recognition task involves exposing rodents second stimulus....

    pdf360p lulanphuong 26-03-2012 41 10   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Evaluation of Empirical Mode Decomposition for Event-Related Potential Analysis

    pdf11p sting05 09-02-2012 16 6   Download

  • The debate is also reflected in the efforts to reform the regulatory environment in response to the current financial crisis. Brunnermeier et al. (2008) also conceptually distinguish between a regulatory and a market based notion of bank capital. When examining the roots of the crisis, Greenlaw et al. (2008) argue that banks’ active management of their capital structures in relation to internal value at risk, rather than regulatory constraints, was a key destabilising factor.

    pdf45p enterroi 02-02-2013 20 5   Download

  • In the framework of Black-Scholes-Merton option pricing models, by employing exotic options instead of plain options or warrants, this paper presents an equivalent decomposition method for the Callable Convertible Bonds (CCB). Furthermore, the analytic valuation formulae for CCB are obtained by using the analytic formulae for those simpler securities decomposed from CCB. This method is validated by comparing with Monte Carlo simulation. Besides, the effects of call clauses, coupon clauses, soft call condition clauses and dividend payment are analyzed respectively.

    pdf0p enter1cai 16-01-2013 18 4   Download

  • A social network service is an online service, platform, or site that focuses on building and reflecting of social networks or social relations among people, e.g., who share interests and/or activities. A social network service essentially consists of a representation of each user (often a profile), his/her social links, and a variety of additional services. Most social network services are web based and provide means for users to interact over the internet, such as e-mail and instant messaging.

    pdf49p thamgiacongdong 02-05-2013 18 3   Download

  • Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí sinh học đề tài : Decomposition of sources of income-related health inequality applied on SF-36 summary scores: a Danish health survey

    pdf7p sting02 31-01-2012 15 2   Download

  • Introduction: The rapid growth of the miniature electronic and computer-related industries has led to great demand for smaller and lighter batteries with improved safety, energy, and power characteristics. Lithium polymer batteries are expected to meet the above requirements and are thus considered as next-generation rechargeable batteries. The conventional lithium-ion batteries, which contain a large amount of liquid electrolyte, emit an appreciable amount of gas and this is attributed to the decomposition of a protective layer at the carbon surface. ...

    pdf13p congdat261 06-12-2010 74 23   Download

  • The idea for this book stems from a meeting sponsored by the European Union, organized by N. van Breemen, and held in Doorweerth at the end of 1991. At this meeting a large number of European scientists discussed the different issues related to the accumulation and decomposition of organic matter in terrestrial ecosystems. One of the objectives was to gather scientists from various disciplines (biologists, chemists, ecologists, agriculturalists) to pool their different disciplinary approaches and come up with a common perspective for future research on soil organic matter.

    pdf578p phoebe75 01-02-2013 18 7   Download

  • The wavelet transform is a new arrival on the mathematical scene. It is widely applied in the area of engineering, image processing. In this paper, we present the main concepts of wavelet, the averaging and differencing technique related to a wavelet decomposition, a linear algebra implementation of the Haar wavelet transform.

    pdf10p tuanlocmuido 19-12-2012 25 3   Download

  • This paper describes the t r e a t m e n t of nominalizations in the P U N D I T text processing system. A single semantic definition is used for both nominalizations and the verbs to which they are related, with the same semantic roles, decompositions, and selectional restrictions on the semantic roles. However, because syntactically nominalizations are noun phrases, the processing which produces the semantic representation is different in several respects from t h a t used for clauses.

    pdf9p bungio_1 03-05-2013 12 1   Download

Đồng bộ tài khoản