Simple types

Định nghĩa: loại thực thể (Entity Type) là những loại đối tượng hay sự vật của thế giới thực tồn tại cụ thể cần được quản lý. Ví dụ : HOCVIEN, LOP, MONHOC, … Ký hiệu: Đơn trị (Simple): mỗi thực thể chỉ có một giá trị ứng với mỗi thuộc tính.  Ví dụ: Mahv,Hoten Đa hợp (Composite): thuộc tính có thể được tạo thành từ nhiều thành phần.  Ví dụ: DCHI(SONHA,DUONG,PHUONG,QUAN) hay thuộc tính HOTEN(HO,TENLOT,TEN). Đa trị (Multi-valued): thuộc tính có thể có nhiều giá trị đối với một thực thể.  Ví dụ: BANGCAP ký hiệu {BANGCAP...

54p chieu_mua 23-08-2012 268 39   Download

Objectives: understant what & why use web service, know some type of architectural models, understant web service architecture, determine service - oriented architecture, understant and use some web service technologies, build a simple web service.

168p xaydungk23 27-10-2014 81 9   Download

Objectives: understand enterprise application, know some type of architectural models, understand web service architecture, determine service - oriented architecture, understand and use some web service technologies, build a simple web service.

90p xaydungk23 27-10-2014 76 8   Download

Introduction to shock & vibration gives an introduction to vibration through a description of the most common mechanical parameters leading to the behaviour of simple mass spring systems. Furthermore the different types of signals and their description is treated and the conversion between the different parameters is described mathematically and graphically. Finally the measurement units are defined.

36p vanquanpl 18-05-2015 58 8   Download

Value Type's Objectives is Discuss concept of value types (efficiency, memory management, value semantics, boxing, unboxing, simple types); introduce structvalue type (definition, use, advantages, limitations).

0p cocacola_08 21-11-2015 30 1   Download

After completing this chapter, students will be able to: Understant what and why use web service, know some type of architectural models, understant web service architecture, determine service-oriented architecture understant and use some web service technologies, build a simple web service.

168p youcanletgo_04 15-01-2016 77 7   Download

Upon completion of this lesson, the successful participant will be able to: Understand enterprise application, know some type of architectural models, understand web service architecture, determine service-oriented architecture, understand and use some web service technologies, build a simple web service.

90p youcanletgo_04 15-01-2016 64 5   Download

Lecture "Charter 2: Introduction to C Programming" provides students with the knowledge: To write simple computer programs in C, to use simple input and output statements, the fundamental data types, computer memory concepts, to use arithmetic operators,... Inviting you refer.

72p doinhugiobay_13 24-01-2016 63 4   Download

Researching this topic and thesis aims to: Describe to clarify the characteristics of the agentives and the objectives in relation to the semantic nucleus. Indicate the role of the objects agentives and objectives to the realization of the types of things, the realization of the meaning of the predicates in the situation.

28p tunelove 10-06-2021 25 3   Download

The thesis proposes a simple but very effective method to study the unique solvability and an iterative method for solving five boundary value problems for nonlinear fourth order ordinary differential equations with different types of boundary conditions and two boundary value problems for a biharmonic equation and a biharmonic equation of Kirchhoff type by using the reduction of these problems to the operator equations for the function to be sought or an intermediate function.

27p larachdumlanat129 20-01-2021 31 3   Download

Pioglitazone hydrochloride (PGH) is an oral anti-hyperglycemic agent used in the treatment of type-2 diabetes mellitus. Potassium permanganate was found to oxidize PGH both in acidic and basic conditions, based on which two simple and sensitive methods were developed for its determination in bulk sample and tablets, and validated.

12p tocectocec 25-05-2020 15 2   Download

Force measurement is very vital in various scientific applications and its precise measurement is very necessary for reliability of the measurement process. There are several types of simple shaped force transducers, which may range from ring shaped force transducers to cantilever type or beam type force transducers.

11p tohitohi 19-05-2020 10 1   Download

Research objectives: To form a direct, simple and easy-to-use methodology to determine the redundancy of bridge’s structure. Form a finite element method in order to take into account the nonlinear behavior of the structure, when one or some of the main structure part is failure.

19p change03 06-05-2016 54 2   Download

Objectives: understand enterprise application, know some type of architectural models, understand web service architecture, determine service - oriented architecture, understand and use some web service technologies, build a simple web service.

11p xaydungk23 27-10-2014 69 5   Download

Objectives: understant what & why use web service, know some type of architectural models, understant web service architecture, determine service - oriented architecture, understant and use some web service technologies, build a simple web service, RMI, J2EE architecture, JMS, WS, RESTful WS, Web.

3p xaydungk23 27-10-2014 45 3   Download

Developed by Sun Microsystems (James Gosling) A general-purpose object-oriented language Based on C/C++ Designed for easy Web/Internet applications Widespread acceptance Simple fixes some clumsy features of C++ no pointers automatic garbage collection rich pre-defined class library Object oriented focus on the data (objects) and methods manipulating the data all functions are associated with objects almost all data types are objects (files, strings, etc.) potentially better code organization and reuse...

14p huanltgc00061 05-05-2013 73 3   Download

This review provides a comparative overview of recent developments in the modelling of cellular calcium oscilla-tions. A large variety of mathematical models have been developed for this wide-spread phenomenon in intra- and intercellular signalling. From these, a general model is extracted that involves six types of concentration variables: inositol 1,4,5-trisphosphate (IP3), cytoplasmic, endoplasmic reticulum and mitochondrial calcium, the occupied binding sites of calcium buffers, and the fraction of active IP3 receptor calciumrelease channels....

23p research12 29-04-2013 28 3   Download

Staphylococcalnuclease is a single domain protein with 149 amino acids. It has no disulfide bonds, which makes it a simple model for the study of pro-tein folding. In this study, 20 mutants of this protein were generated each with a single base substitution of glycine for negatively charged glutamic acid or aspartic acid. Using differential scanning microcalorimetry in ther-mal denaturation experiments, we identified two mutants, E75G and E129G, having approximately 43% and 44%, respectively, lowerDHcal values than the wild-type protein....

8p fptmusic 11-04-2013 46 3   Download

We have developed a novel plasmid vector, pEBTetD, for full establish-ment of doxycycline-inducible protein expression by just a single transfec-tion. pEBTetD contains an Epstein–Barr virus origin of replication for stable and efficient episomal propagation in human cell lines, a cassette for continuous expression of the simple tetracycline repressor, and a cytomega-lovirus-type 2 tetracycline operator (tetO2)-tetO2 promoter.

8p galaxyss3 21-03-2013 40 3   Download

In this paper, we study the growth of sX(L), the number of simple closed geodesics of length ≤ L on a complete hyperbolic surface X of finite area. We also study the frequencies of different types of simple closed geodesics on X and their relationship with the Weil-Petersson volumes of moduli spaces of bordered Riemann surfaces.

30p dontetvui 17-01-2013 49 7   Download