fundamentals of data modeling

... on his sales of equipment If he sells $125,000 worth of equipment this month, how much will he be paid this month? Joan makes a base salary of $275 per week and a commission of 4% of sales over ... earn a commission of 9.5% of your monthly sales made over your base pay of $800 per month (a) Write an equation that models this situation (b) What would the slope of the graph of this model be? ... purchases 50 shares of Wendy’s stock 19 Larry purchased 175 shares of stock A at a price of $49.50 and 250 shares of stock B at $29.88 He also paid $9.99 in online broker’s fees for each of the two purchases

Ngày tải lên: 18/05/2017, 10:17

... FUNDAMENTALS OF DATA MINING IN GENOMICS AND PROTEOMICS FUNDAMENTALS OF DATA MINING IN GENOMICS AND PROTEOMICS Edited by Werner Dubitzky University of Ulster, Coleraine, ... notion of question or hypothesis at the point of data generation Depending on what phenomenon is being studied and the methodology and technology used to generate data, genomic and proteomic data ... interpretation of clustering results in the context of microarray data Chapter addresses the important topics of feature selection, feature weighting, and dimension reduction for high-dimensional data

Ngày tải lên: 23/10/2019, 15:13

... rate Transpose of vector x Data set Distance between x and y Expectation of a random variable X Average of k i*^ learning set Set of real numbers i*'* test set Training set of the i*'* external ... understanding of the dif-ferent qualitative and quantitative aspects of a given data set using techniques such as data visualization, clustering, data reduction, etc Exploratory meth-ods are often used ... expression profiling based on microaxrays holds the promise of a patient-tailored therapy Recent advances in high-throughput mass spectrometry allow the profiling of proteomic patterns in biofiuids

Ngày tải lên: 05/11/2019, 14:46

... Conceptual modeling script The product of conceptual “data” modeling We just say conceptual modeling in the book Conceptual modeling grammar Defines the set of constructs and rules for the conceptual modeling ... development of data models Chapter 2 Overview This chapter introduces the fundamental constructs and rules for conceptual data modeling using the entity-relationship (ER) modeling grammar as the modeling ... implicitly in the schema of a data model and is carried forward through the data modeling tiers in textual form Domain constraint A data integrity constraint that establishes the range of acceptable values

Ngày tải lên: 21/11/2019, 17:05

... Trang 2Fundamentals of Data Analysis Marketing Research 12th Edition Trang 3•   Data editing •   Coding •   Statistically adjusting the data Trang 5• Coding closed­ended questions involves specifying  ... Open­ended questions are difficult to code   ▫Lengthy list of possible responses is generated Trang 9• Consists of counting the number of cases that fall  into various categories Trang 10• Can be illustrated simply as a number or as a percentage or histogram ... Should result in categories with worthwhile  number of respondents Marketing Research 12th Edition Trang 11Frequency DistributionTrang 12Marketing Research 12th Edition Trang 14▫ Classification of data involves nominal, ordinal, interval and ratio scales of measurement

Ngày tải lên: 18/01/2020, 19:21

... Finally, the role of deletion rules and the specification of deletion constraints are discussed Data Modeling and Database Design 2-2 Chapter Key Terms Method Semantic modeling Conceptual modeling script ... conceptual modeling, describes how to use the conceptual modeling grammar The overall activity of attempting to represent meaning The product of conceptual “data” modeling We just say conceptual modeling ... generalization of different related entity types that have shared attributes Data Modeling and Database Design 2-7 Describe various data types associated with attributes Answer A variety of data types

Ngày tải lên: 31/01/2020, 16:19

... y[], float sig[], int ndata, float a[], int ma, float **u, float **v, float w[], float *chisq, void (*funcs)(float, float [], int)) Given a set of data points x[1 ndata],y[1 ndata]with individual ... more often than experi-menters would like to admit, data do not clearly distinguish between two or more of the basis functions provided If two such functions, or two different combinations of functions, ... least-squares problems are both overdetermined (number of data points greater than number of parameters) and underdetermined (ambiguous combinations of parameters exist); but that is how it frequently

Ngày tải lên: 15/12/2013, 04:15

... quantitative So the name of the game is to find some way of estimating or approximating available to us an infinite universe of hypothetical data sets Monte Carlo Simulation of Synthetic Data Sets a fictitious ... from NUMERICAL RECIPES IN C: THE ART OF SCIENTIFIC COMPUTING (ISBN 0-521-43108-5)synthetic data set 1 synthetic data set 2 synthetic data set 3 synthetic data set 4 a2 χ2 min χ2 min (s) a(s)1 ... or different data reduction techniques, and seek to minimize the uncertainty of the result according to any desired criteria Offered the choice between mastery of a five-foot shelf of analytical

Ngày tải lên: 15/12/2013, 04:15

... Trang 2DATA MODELING FUNDAMENTALSA Practical Guide for IT Professionals Paulraj Ponniah Trang 4DATA MODELING FUNDAMENTALSTrang 6DATA MODELING FUNDAMENTALSA Practical Guide for IT Professionals ... 26INTRODUCTION TO DATA MODELING 1 Trang 28DATA MODELING: AN OVERVIEW CHAPTER OBJECTIVES Introduce the process of data modeling Present why data modeling is important Explain how a data model represents ... specializing in data modeling must be experts with athorough knowledge of data modeling fundamentals They must be well versed in themethodologies, techniques, and practices of data modeling xvii

Ngày tải lên: 07/07/2014, 09:20

... performs data modeling? Data modeling specialists with appropriatetraining, knowledge, and skills do the work of data modeling.However, the recent trend is not to employ persons having data modeling ... initialdiscussion of the data modeling steps, these simple symbols are sufficient Figure 1-11 shows examples of these data model components CONCEPTUAL DATA MODELING 19 Trang 15Data Modeling StepsArmed ... different methods of data creation and data gathering in this stage The data gather-ing trials and methodologies are scoped out with the aid of the data model Storing Data The collected data must be

Ngày tải lên: 07/07/2014, 09:20

... need for these four types of data models The four types of data models must together fulfill the purposes of data modeling Atone end of the development process for a data system is the definition ... conceptual data model Provide an overview of logical and physical models In Chapter 1, we covered the basics of the data modeling process We discussed the needfor data modeling and showed how a data ... types of diagrams in UML used in the system development process.Give examples for two of the types of diagrams REVIEW QUESTIONS 69 Trang 6DATA MODELING FUNDAMENTALS 71 Trang 8ANATOMY OF A DATA

Ngày tải lên: 07/07/2014, 09:20

... components of the logical data model. The logical data mo del for a rela- tional database system may be termed a relational data model. A relational data model 104 CHAPTER 3 ANATOMY OF A DATA MODEL ... logical data model In our case, the relational data model is the logical data model Note the following major components of a conceptual data model and a relational data model E-R Data ... deletes Data Volumes Sizing for each data and index file Data Usage Analysis of expected data access paths and access frequencies Data Distribution Strategy for providing data to users

Ngày tải lên: 07/07/2014, 09:20

... Does the existence of a single orderdepend on the existence of entities of another entity type in the database? Does the exist-ence of an order number 1234 depend on the existence of the corresponding ... repeating these as attributes of each of the subtypes In a data model diagram, you may, therefore, show these as butes of the supertype The principle of inheritance of attributes by the subtypes ... one entity type. Trang 2in the case of synonyms, you will have to sift through hundreds of terms to detect them.During the initial iterations of the data modeling process, as soon as you suspect

Ngày tải lên: 07/07/2014, 09:20

... values of the attributes of the 157 Data Modeling Fundamentals By Paulraj Ponniah Copyright # 2007 John Wiley & Sons, Inc. Trang 3business objects Apart from a few other types of data stored ... characteristic of an entitytype that is of interest to the organization.Indicates Data An attribute of an entity type designates the nature of the data that ismaintained in the database for that ... getsinterpreted in the context of a set of entities FIGURE 5-2 Attributes of a relationship. Trang 6Attributes as DataMost people, even many data modelers, think of attributes as data This is only partiallytrue

Ngày tải lên: 07/07/2014, 09:20

... teaches Data Modeling course Irrespective of this association, theinstance of INSTRUCTOR, namely, Kassia Silverton, will exist in the database In thesame manner, the instance of COURSE, namely, Data ... relationships in terms of entity existence conditions has a strong impact onimplementation of these in the database When we study transformation of conceptual datamodel into a logical data model, especially ... doctors, patients, and offices In a group practice havingseveral locations, doctors may see patients in any of the offices of the group practice.Therefore, the date and time of an appointment depend

Ngày tải lên: 07/07/2014, 09:20

... 7 DATA MODELING TO DATABASE DESIGN FIGURE 7-8 Relational tables Data Integrity Constraints It is essential that a database built on any specific data model must ensure validity of data ... conceptual data 244 CHAPTER 7 DATA MODELING TO DATABASE DESIGN FIGURE 7-12 Relational data model: design approaches model, you may use the E-R data modeling technique Some other modeling ... structure III DATA MODEL IMPLEMENTATION 227 7 DATA MODELING TO DATABASE DESIGN CHAPTER OBJECTIVES Make the transition from data modeling to database design Focus on the relational data model

Ngày tải lên: 07/07/2014, 09:20

... com-ponents of the conceptual data model and change each component to a component of therelational data model.Easy Mapping of Components A conceptual data model is composed of a small tinct set of components ... point of view of storing and managing data in the database system However, the objectives of database development are to ensure that any data modelused must truly replicate all aspects of information ... captures details of real-world information After the ments definition phase, you move to conceptual data modeling to create a replica of infor-mation requirements From conceptual data modeling, you

Ngày tải lên: 07/07/2014, 09:20

... employee, data about Potterwill be missing in the database until then This is the effect of addition anomaly.Addition Anomaly Results in inability to add data to the database because of the absence of ... goal of good design of a proper relational data model If adata model is in the domain-key normal form (DKNF), it satisfies the conditions of all thenormal forms discussed so far The objective of ... such an initial data model is subject to data manipulationproblems You apply the principles of the first step In this step, you are examining the initial datamodel for only one type of nonconformance

Ngày tải lên: 07/07/2014, 09:20

... structure of the data repositories and discuss data modeling in... representing data points along the edges With three groups of data two groups of business dimensions and one group of metrics—we ... These specific data structures determine how data modeling has to be done for OLAP You may be able to adapt general data modeling principles to suit the requirements of OLAP data structures ... Functions of OLAP A data warehouse stores data and provides simpler access and analysis of data However, OLAP... figure must be taken into consideration while performing data modeling

Ngày tải lên: 07/07/2014, 09:20

... data from these sources and feed the data mining application. Data preprocessing generally consists of the following processes: . Selection of data . Preparation of data . Transformation of data ... data modeling? We highlight in the following a few fundamentals of good data modeling practice Proper Mindset Everyone on the project... output of the data modeling process The data ... Conversion of categoric variable into a numeric representation. Data Modeling Data modeling for data mining applications involve representations of the pertinent data repositories. In our discussions of

Ngày tải lên: 07/07/2014, 09:20