EGR 141Computer Problem Solving in Engineering and Computer ScienceProgramming Concepts andthe Visual Basic 2005 Environment

Four key areasDesigning Computer Applications Programming EnvironmentProgramming LanguageProblem Solving

Designing Computer Applications

Programming EnvironmentToolbarToolboxForm WindowPropertyWindowProject ExplorerWindowMenu barTitle bar

Problem SolvingProblem: Separate the static noise from the valuable informationExample: Remove the noise from the image shown. 'Picture is accessed from 0 to width-1, 0 to height-1 'Go from 1 instead of 0 because we can't process edge of the image For x = 1 To pic.Width - 2 For y = 1 To pic.Height - 2 'fill picwindow with the 3x3 window at the current pixel 'this is the processing window For i = -1 To 1 For j = -1 To 1 'get the current pixel brightness r = pic.GetPixel(x + i, y + j).R g = pic.GetPixel(x + i, y + j).G b = pic.GetPixel(x + i, y + j).B pixelval = (r + g + b) / 3 picwindow(i + 1, j + 1) = pixelval Next j Next i newpixelval = 0 'Apply the 3x3 filter using convolution For i = 0 To 2 For j = 0 To 2 newpixelval = newpixelval + picwindow(i, j) * filter(i, j) Next j Next i 'truncate values smaller than zero and larger than 255 newpixelval = Math.Min(Math.Max(Int(newpixelval + bias), 0), 255) 'set the new picture in the new image newpic.SetPixel(x, y, Color.FromArgb(newpixelval, newpixelval, newpixelval)) Next y Next x

Problem SolvingExample: In the image of the rollercoaster, separate the valuable edge information from the rest of the picture.

Problem SolvingProblem: Given information that we know, how can we predict information that we dont know?Example: Use curve fitting to fill in the unknown information: 1st, 2nd, 3rd, order fitting

1st degree polynomial (line)

y = a0 + a1x + e

e = y - a0 - a1x

e2 = (y - a0 - a1x)2 ( The squared error

Minimizing the squared error we can obtain the

best parameters for a0 and a1 using:

and

where

represents the average of x

and

represents the average of y

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_1131360922.unknown

_1131360945.unknown

_1131360773.unknown

2nd degree polynomial (parabola)

y = a0 + a1x + a2x2 + e

Minimizing the squared error we can obtain the

best parameters for a0, a1, and a2 using:

_1131779917.unknown

_1131779992.unknown

Problem SolvingUsing Divide and Conquer techniques to solve basic electronics problemsUsing Divide and Conquer techniques to solve basic dynamics problems

The Language Sub Main() 'Override CurrentUICulture with the fallback culture Thread.CurrentThread.CurrentUICulture = New CultureInfo("", False)

Do 'Create a resource manager Dim MyResMgr As New ResourceManager("VBLocalizedHelloWorld.Strings", System.Reflection.Assembly.GetExecutingAssembly())

'Print out the "HelloWorld" resource string & directions Console.WriteLine(MyResMgr.GetString("HelloWorld")) Console.WriteLine(MyResMgr.GetString("EnterCulture"))

'Get the new culture name Console.WriteLine(MyResMgr.GetString("NextCulture")) Dim NewCulture As String = Console.ReadLine()

'Switch to the desired culture Try Dim c As CultureInfo = New CultureInfo(NewCulture, False) Thread.CurrentThread.CurrentUICulture = c Catch 'Fallback to the default culture if an invalid culture is entered Thread.CurrentThread.CurrentUICulture = New CultureInfo("", False)

End Try

Loop Until (False)

End Sub

Learning in the Lecture

Problem-Solving Sessions

Laboratory

Lecture Introduction to engineering problems and topics

Using Visual Basic 2005 Environment Programming Language

Problem Solving Sessions In-depth explanation for engineering problems and topics

Practice through solving problems

Problem-solving homework

Lab Practice using Visual Basic 2005

Laboratory Assignments

Laboratory Reports

Lab Mentors

Laboratory work will be individualThere are none!

Course will Prepare you for Programming Applications Computer Science Engineering and Science Mathematics Secondary Education with a minor/focus in Computer Science or Mathematics Using a computer to solve problems practically Using Matlab

Course will not Prepare you forCooking an edible mealUnderstanding the Stock MarketPlaying a good game of golfUnderstanding why Oakland University has a Goose Problem

SPA Activity

SPA Activity

Previous Sources say... riveting...absolutely astonishing...truly magnificent...earth shattering-Oakland University Student-Washington Post-Entertainment Weekly-New York Times

Previous Sources say...Instead of sitting through the lectures Id rather be riveting.It is absolutely astonishing that a classroom can have so many ceiling tiles.This class made being sick truly magnificent.I pounded my head against the computer so hard thatthe noise was earth shattering.-Oakland University Student-Washington Post-Entertainment Weekly-New York Times