Tài liệu ELECTRIC POWER SYSTEMS A CONCEPTUAL INTRODUCTION pp

Tài liệu ELECTRIC POWER SYSTEMS A CONCEPTUAL INTRODUCTION pptx

... simplicity, and explanatory richness of that very basic drawing, we can appreciate why phasors are an electrical engineer’s most essential tool for visualizing a. c. power. 84 AC POWER & CHAPTER ... such variables as voltage, frequency, real and reactive power, and stressing in particular the interaction among generators, which is fundamental to the overall performance and stabilit...

Ngày tải lên : 18/02/2014, 22:20

329
1K
0

Tài liệu Module 3: Using a Conceptual Design for Data Requirements docx

... Designing Data Services Module 9: Data Storage Considerations Designing Data Services and Data Models Investigation Process Data Requirements Activity 3.1: Identifying Data-Related Use Cases and Data ... that an actor must know to perform a function or task. Each functional data requirement is directly traceable to an actor and an object within a use case. Nonfunctional data requiremen...

Ngày tải lên : 10/12/2013, 17:15

20
580
0

Tài liệu Module 3: Using a Conceptual Design doc

... Services Module 9: Data Storage Considerations Designing Data Services and Data Models Investigation Process Data Requirements Activity 3.1: Identifying Data-Related Use Cases and Data Requirements Module ... verification Data requirement validation ensures that specified business wants, needs, and constraints are satisfied. " After data requirements are defined, ensuring that the...

Ngày tải lên : 24/01/2014, 10:20

20
335
0

Tài liệu Management Information Systems A Synthesis of Transit Practice ppt

... current general ledger reorganization. (7) Acquire a database management system to assist overall data integration. The standard for a relational database at the microcomputer platform is dBASE III+. ... possible, data must be reasonably easy to maintain and access. A database management system should provide a structured query language (SQL) capability. SQL provides an application-le...

Ngày tải lên : 18/02/2014, 11:20

86
1.2K
0

Tài liệu ELECTRIC POWER SYSTEM BASICS doc

... transformer coils. Acetylene gas might indicate that arcing has occurred inside the transformer. Samples are taken periodically and the gas analysis compared to previous samples in a trend-analysis ... Residential, commercial, and small industrial loads are normally served with voltages under 600 volts. Manufacturers have standardized the provision of insulated wire to have a maximum 60...

Ngày tải lên : 18/02/2014, 22:20

258
765
3

Tài liệu The Neo Database – A Technology Introduction (20061123) doc

... space, the tool support for relational databases are naturally much better. ● Relational databases are better at arbitrary queries on structured data. Neo can handle structured data as well as ... as a navigational database – which means that you navigate from a (given or arbitrary) start node via relationships to the nodes that match your criterias. In principle, you can do this via...

Ngày tải lên : 19/02/2014, 12:20

8
392
0

Tài liệu DC Power in the Evolving Network pptx

... communications. DC power also is constant and cleaner while enabling service providers to maintain a battery backup in the event of a main failure. For data and video providers who are intent on adding voice ... equipment can now be individually fused. • There is A to B power redundancy to each individual piece of equipment. • A DC power plant is easier to monitor. • Cable mana...

Ngày tải lên : 21/12/2013, 08:17

4
421
0

Tài liệu Proxies, What is a Proxy Server? pptx

... proxy servers? Transfer speed improvement. Proxy servers accumulate and save files that are most often requested by thousands of Internet users in a special database, called “cache”. Therefore, ... and only then it transmits the data to you. I know many are looking for IP Maskers or Scramblers, but honestly, it aint real easy for the simple fact that any website that you visit needs you...

Ngày tải lên : 23/12/2013, 19:15

2
568
1

Tài liệu Maintaining State in a Web Application pptx

... a user can order products from, store their shopping cart in the database. Using a DataGrid Control to Access a Database A DataGrid allows you to access rows in a database table. In ... create a DataSet object. You use a DataSet object to store a local copy of the information stored in the database. A DataSet object can represent database structures such as tables,...

Ngày tải lên : 24/12/2013, 01:17

22
412
0