a llxical data base

Ngày tải lên: 22/02/2014, 09:20

Ngày tải lên: 03/01/2014, 19:36

Ngày tải lên: 28/04/2014, 13:31

Ngày tải lên: 20/06/2014, 20:20

Ngày tải lên: 21/06/2014, 05:20

Ngày tải lên: 21/06/2014, 18:20

... tạo. Cú pháp: CREATE DATABASE database_snapshot_name ON ( NAME = logical_file_name, FILENAME = ‘os_file_name’ ) [ , n ] AS SNAPSHOT OF source_database_name [;] RDBMS and Data Management/ Session ... n a, nó có thể bị hủy bỏ ALTER DATABASE database_name { <add_or_modify_files> | <add_or_modify_filegroups> | <set_database_options> | MODIFY NAME = new_database_name | COLLATE ... COLLATE collation_name ] ] [;] RDBMS and Data Management/ Session 7/16 of 25 Nhóm tập tin và ghi vết giao dịch  Thêm nhóm tập tin vào CSDL đã có: Cú pháp ALTER DATABASE database_name { <add_or_modify_files> |...

Ngày tải lên: 01/09/2012, 09:09

... necessary NACA 4 Development of vital (life threatening) danger possible NACA 5 Acute vital (life threatening) danger NACA 6 Acute cardiac or respiratory arrest NACA 7 Death Zakariassen et al. Scandinavian ... Grønlien, and Jan Nystuen from the area of Innlandet, Unni Eskeland and Olav Østebø from the area of Stavanger, and Leif Landa, Kari Hauge Nilsen, and Trond Kibsgaard in the area of Haugesund. We want ... erik.zakariassen@isf.uib.no 1 National Centre for Emergency Primary Health Care, Uni Health, Bergen, Norway, Kalfarveien 31, 5018 Bergen, Norway Zakariassen et al. Scandinavian Journal of Trauma,...

Ngày tải lên: 25/10/2012, 09:56

... smok- ing and cancer deaths, was not measured in this study, and the separate calculation of risk patterns in urban and rural areas was used as a surrogate analy- sis by socioeconomic status. In ... indication. Our findings revealed that better equivalence exists in urban than in rural areas, and for cancers with a high death rate than for ‘rare’ cancers. The possible expla- nations may ... can insure consistency between the initial design and final analysis based on symmetric CIs for estimation using a normal CI ap- proach. Second, a large adequate sample size in each compared...

Ngày tải lên: 26/10/2012, 09:48

... type (Double) Float (Long) Integer Integer value with double-precision data range over regular integer data type Every field within a database must have a data type. The data type allows you, and the database engine itself, ... language that abstracts the operations performed on a database into easily readable statements, such as Insert, Update, and Delete. Most referential databases adhere to the ANSI SQL standard, ... There is no relationship between flat-file databases because each database exists without knowledge of any other database. Performance on this type of database is usually very good because of its...

Ngày tải lên: 18/10/2013, 19:15

... Telecommunications, Winter 2000 Lecture-22 Digital Transmission Digital Transmission of Analog Data (Baseband Transmission): • Analog voice data must be translated into a series of binary digits ... transmission of analog information represents a basic application of digital communications. Sampling: • It is an operation that is basic to digital signal processing and digital communication. ... an analog signal that are usually uniformly spaced in time. Sampling is usually described in time domain. To get back the original analog signal we have to convert back the sampled signal...

Ngày tải lên: 09/12/2013, 16:15

... Data? What Is the Current Use of Offline Data? ? ? ? What Is the Current Use of Roaming Data? What Is the Current Use of Roaming Data? Personal data Personal business data Shared business data ***************************** ILLEGAL ... User Data Strategies  Determining the Organizational Requirements  Categorizing User Data Management Needs  Identifying Available User Data Management Options  Selecting Appropriate User Data ... that Windows 2000 provides. Lead-in You can use quotas to manage users’ data. Important Module 4: Designing a User Data Management Strategy v  Identifying Available User Data Management...

Ngày tải lên: 10/12/2013, 15:15

... 4.2: Creating a Logical Data Model In this activity, you will use the skills learned in this module to define the relationships within a logical data model and produce a sample ER diagram for ... the Ferguson and Bardell, Inc. case study. In each of the two exercises in this activity, you analyze a single aspect of a logical data design. At the end of each exercise, the class will discuss ... cardinality and existence characteristics of each of the relationships defined in Exercise 1. ! Identify cardinality 1. For each relationship on your ER diagram, ask the question “How many...

Ngày tải lên: 21/12/2013, 06:16

... Using a Conceptual Design for Data Requirements Module 8: Designing Data Services Module 9: Data Storage Considerations Designing Data Services and Data Models Logical Data Design Entities and Attributes Activity ... that must be addressed during logical data design concern the data services, which determine how the data will be managed and manipulated. Development of a logical design provides a road map ... 4: Deriving a Logical Data Design Creating the Logical Data Model Now that you know the syntax used for logical data models, you can produce an ER diagram. The ER diagram in the slide...

Ngày tải lên: 21/12/2013, 06:18

... Therefore, it appears logical that a feedforward backpropagation-type ANN which has high computational capability can implement an SVM algorithm. Note that the ANN has inherent learning capability that can ... voltage is balanced in an open-loop manner. The frequency and voltage can be varied from zero to full value in the whole undermodulation range. A simulated DSP-based modulator generates the data ... bias time and variable .The digital word corresponding to as afunction of angle for both and states in all the phases and in all the modes can be generated by simulation for training a neural...

Ngày tải lên: 22/12/2013, 08:16

... is above 22.8 Ah, the system is reliable, though the capacity of a battery is lower than 5700 mAh. Suppose the capacity of the first branch is 5600 mAh and the capacity of other branches are ... system is not less than 22.8 Ah. To protect proprietary data, all parameters have been scaled. This does not in any way affect the validity of the method presented in this paper. Figure 1. ... are b inary, but they are all multi-state actually. The performance of the batteries can degrade, which results in performance degradation of the power system. So there can be several states...

Ngày tải lên: 03/01/2014, 19:38

... create a logical data model from entities, attributes, and relationships. After completing this module, students will be able to: ! Analyze data requirements to determine data entities and attributes. ... P04_160 9a. ppt ! Module 4, “Deriving a Logical Data Design” ! Activity 4.1, “Deriving Entities and Attributes from Data Requirements” ! Activity 4.2, “Creating a Logical Data Model” Preparation ... Analyze data entities and attributes to determine their relationships. ! Determine the cardinality and existence characteristics of a relationship. ! Create an entity/relationship diagram....

Ngày tải lên: 17/01/2014, 09:20

... will be able to: ! Derive a physical data design for tables and fields from a logical data design. ! Analyze data usage characteristics to optimize a physical data design. ! Determine methods ... rapidly. Note that the data types listed in the workbook are generic. Actual data types will vary depending on the databases that are used. Instructor Notes Module 6: Deriving a Physical ... Module 6, “Deriving a Physical Data Design” ! Activity 6.1, “Translating the Logical Data Design” ! Activity 6.2, “Optimizing a Physical Data Design” Preparation To prepare for this module,...

Ngày tải lên: 17/01/2014, 09:20

... Solutions may include: Replicate the database on the local client computer using MSDE, and then upload the new information to the main SQL Server database daily. Create a separate database and table ... that only accept timesheet data. Replicate this data to the main database as needed. 5. Management must be able to run reports even if the rest of the system is unavailable. Solutions can ... can vary. Solutions may include: Replicate the database on the local client computer using MSDE. Create a separate reporting database that receives replicated information on a periodic basis....

Ngày tải lên: 17/01/2014, 09:20

... Team LiB ] Recipe 4.7 Updating a Data Source with Data from a Different Data Source Problem You want to update a data source using changes made to another data source for data replication ... that have changed in the original data source. This DataSet is then used to apply the changes to a second data source using its DataAdapter; the DataSet for the second data source is reloaded. ... to a data source using a DataAdapter. The data source to which the DataSet is reconciled is usually, but does not have to be, the original data source. The GetChanges( ) method of the DataSet...

Ngày tải lên: 21/01/2014, 11:20