system analysis and design methods whitten bentley ppt

... and Design? System development can generally be thought of having two major components: systems analysis and systems design. In System Analysis more emphasis is given to understanding the details ... done. 2.2.3. Design of System After the system has been analyzed by the analyst, the design stage of system life cycle begins. In design phase, the structure or design for the proposed system is ... between analysis and design? Can one begin to design without analysis? Why 2.11. Summary of System Development Life Cycle Models Key points covered in this lesson are >>The system& apos;s...

Ngày tải lên: 27/10/2013, 23:15

... three-phase system are only half those of the three separate single-phase systems, and the line-voltage drop between the source and load in the three-phase system is half that of each single-phase system. ... maintaining system standards and reliability. NERC coordinates its e¤orts with FERC and other organizations such as the Edison Electric Institute (EEI) [10]. As shown in Figure 1.3, the transmission system ... functions for both the distributed energy system and the local electric power system that allow paral- leling and disconnection from the electric power system. These power electronic interfaces...

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Ngày tải lên: 24/04/2014, 16:00

... 1 SCHOOL OF INFORMATION AND COMMUNICATION TECHNOLOGY HANOI UNIVERSITY OF SCIENCE AND TECHNOLOGY ______ * ______ SYSTEM ANALYSIS AND DESIGN REPORT Author : ... Conceptual data modeling ………………………………………… 17 B. Design I. High-level Design 1. Scenario Analysis …………… 18 2. Object Analysis ……………………………………………… 22 3. Screen Design 3.1 Log on ……………………………………………… 24 ... B. Design I. High – level Design 1. Scenario analysis. 1.1. User log on 27  Citizen User Menu Screen Screen Layout System name S City Library System...

Ngày tải lên: 01/06/2014, 17:25

Ngày tải lên: 01/06/2014, 23:13

... Inc. obtainingatimeresponse,andROOTLforobtainingroot-locusdataand plots.TheseCADpackagesbecamethebasisforthepracticalcontrol systemdesignCADpackagecalledTOTAL,theforerunnerofTOTAL-PC [8],whichwasdevelopedin1978atAFIT.TOTALbecamethecatalyst, alongwithothercontrolCADpackagesdevelopedbyotherindividuals, forthedevelopmentofthecurrenthighlydevelopedcommercialcontrol systemdesignCADpackagesthatarenowreadilyavailable.Oneofthese CADpackagesisMATLAB,whichhasbecomeavaluabletoolforacontrol engineerandisillustratedinthistext.ThedetailedcontentsoftheTOTAL- PCCADpackagearedescribedinAppendixD.Theprogramiscontainedin thediskwhichisincludedwiththisbook. Becomingproficient(computerliterate)intheuseoftheseCAD packages(tools)isessentialforacontrolsystemsengineer.Itisalsoessential todevelopproceduresforcheckingtheCADresultsateachstageofthe analysisanddesign.ThisisnecessaryinordertoverifythattheseCADtools havegeneratedresultswhichareconsistentwiththeory.Wheneverindoubt, concerningtheoperationofaspecificCADtool,applytheCADtooltoa simpleproblemwhoseknownanalyticalsolutioncanbereadilycomparedto thecomputergeneratedoutput. 1.9OUTLINEOFTEXT Thetextisessentiallydividedintothreeparts.Thefirstpart,consistingof Chapters2through4,providesthemathematicalfoundationformodeling physicalsystemsandobtainingtimesolutionsusingclassicalorLaplace transformmethods.ThesecondpartconsistsofChapters5through9that providethefundamentalsofconventionalcontroltheoryandstate-variable concepts.Theremainingportionofthetextrepresentsmaterialthatisusually coveredinthefirstorsecondundergraduatecourseincontroltheoryand controlsystemdesign. Thefirstfewchaptersdealwiththemathematicsandphysicalsystem modelingthatunderlietheanalysisofcontrolsystems.Oncethetechniqueof writingthesystemequations (and, inturn,theirLaplacetransforms)that describetheperformanceofadynamicsystemhasbeenmastered,theideas ofblockandsimulationdiagramsandtransferfunctionsaredeveloped. Whenphysicalsystemsaredescribedintermsofblockdiagramsandtransfer functions,theyexhibitbasicservocharacteristics.Thesecharacteristicsare describedanddiscussed.Theconceptofstateisintroduced,andthesystem equationsaredevelopedinthestandardmatrixformat.Thenecessarylinear algebrarequiredtomanipulatethematrixequationsisincluded.Apresenta- tionofthevariousmethodsofanalysisisnextpresentedthatcanbeusedinthe studyoffeedbackcontrolsystems.SISOsystemsareusedinitiallytofacilitate 26Chapter1 Copyright ... designer’s control -system design proficiency, since it minimizes and expedites the tedious andrepetitive calculations involved inthe design of a satisfactory control system. To understand and use a computer-aided ... a computer-aided analysis and design package, one must first a chieve a conceptual understanding of the theory and processes involved in the analysis and synthesis of control systems. Once the...

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Ngày tải lên: 18/12/2013, 09:10

... anti-spam systems do not work properly, i.e. if the false-positive and/ or false-negative rates are too high. On the other hand, ESPs can gain a good reputation by providing effective anti-spam systems. Communication ... Freiling, and Prof. Kai Reimers for their efforts and for their feedback that helps much to improve the manuscript. Finally, I would like to mention the involved Springer staff for their very kind and ... Resources and Period to measure Relatively short period of time; not resource intensive Relatively longer period of time and more resources required Continuous relationship with subscribers and...

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Ngày tải lên: 13/02/2014, 20:20

... relationship among specialized analysis tools, Arthur M. Langer Analysis and Design of Information Systems Third Edition 16 Analysis and Design of Information Systems System Boundaries. This provides ... requirements to system requirements 5. Design the database and accompanying applications 6. Build, test, and implement the database and applications 20 Analysis and Design of Information Systems Transition ... design of the program structure, Requirement Application Design Database Design Network Design Outline System Design Audit & Control Design Back-up & Recovery Design Transition Design System Test Plan Final...

Ngày tải lên: 13/05/2014, 19:21

... Traffic Analysis and Design of Wireless IP Networks Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com Traffic Analysis and Design of Wireless IP Networks Simpo PDF Merge and ... operators and users. On the other hand, it raises new traffic and design issues. This book provides traffic analysis, dimensioning, quality of service (QoS), and design aspects for wireless IP networks ... transmission of information and incompatibility of the systems in different countries. Thus, each developed country in Europe developed its own system and standards for it, but different systems were incompatible...

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... DISCRETE-SIGNAL ANALYSIS AND DESIGN DISCRETE-SIGNAL ANALYSIS AND DESIGN WILLIAM E. SABIN A JOHN WILEY & SONS, INC., PUBLICATION

Ngày tải lên: 04/07/2014, 07:20

... DISCRETE-SIGNAL ANALYSIS AND DESIGN WILLIAM E. SABIN A JOHN WILEY & SONS, INC., PUBLICATION CONTENTS Preface xi Introduction 1 Goals of the Book Discrete Signals Advantages of Discrete-Signal Analysis and ... 1 Goals of the Book Discrete Signals Advantages of Discrete-Signal Analysis and Design DFT and IDFT Mathcad Program MATLAB and Less Expensive Approaches Multisim Program from National Instruments Co. Mathtype ... the Time and Frequency Domains Two-Sided Time and Frequency Discrete Fourier Transform Inverse Discrete Fourier Transform vii This book is dedicated to my wife, Ellen; our sons, Paul and James; our...

Ngày tải lên: 04/07/2014, 07:20

... ANALYSIS AND DESIGN In this book, we will get a better understanding of discrete-time and discrete-frequency signal processing, which is rapidly becoming an impor- tant modern way to design and ... mathematical back- ground and understanding are unclear. Before we can design something we have to look beyond the diagrams, parts lists, and formula handbooks. The reliance on intuitive methods, especially, ... using the traditional and laborious mathematical pencil -and- paper methods of former eras. This is especially true of certain nonlinear circuits and sys- tems that engineering students and experimenters...

Ngày tải lên: 04/07/2014, 07:20

... SINE, COSINE, AND θ 35 the given signal. In practice we might not know the waveform ahead of time and we would be asked to examine the phasor amplitudes and phases and use Fig. 2-2 to determine ... a third out-of-band frequency to see the degradation of the in-band two-tone signal. This can be very illuminating and very practical. Example 2-1: Nonlinear AmpliÞer Distortion and Square Law ... perfectly linear. We will use the DFT [Eq. (1-2)] to get the spectrum and IDFT (Eq. 1-8) 34 DISCRETE-SIGNAL ANALYSIS AND DESIGN x(n) := 7⋅cos 2⋅π⋅ ⋅4 + 60⋅ n N π 180 N := 16 n := 0,.01 N − 1...

Ngày tải lên: 04/07/2014, 07:20

... 2·π· n N–1 . Hanning Figure 4-3 (continued ) SMOOTHING AND WINDOWING 67 retain a causal (n and k from 0 to N −1) result, we must delay and terminate the sequence and use smoothing and windowing sufÞciently that aliasing ... and see that the selectivity is widened in the k =0 region, and the Þrst notch is at k =2. This widening is a fundamental property of all non-rectangular windows and is the “cost” SMOOTHING AND ... spectrum. SMOOTHING REFERENCES Jenkins, G.M., and D.G. Watts, 1968, Spectral Analysis and Its Applications, Holden-Day, San Francisco, CA. Oppenheim, A.V., and R.W. Schafer, 1975, Digital Signal Processing, McGraw-Hill,...

Ngày tải lên: 04/07/2014, 07:20

Ngày tải lên: 04/07/2014, 07:20

Ngày tải lên: 04/07/2014, 07:20