Hi Class!

Welcome to ECE105 Class! In this class:

You will learn to use MATLAB to solve Math & Engineering problems. 

Some of you already had my ECE103 class, you are going to find out the first 4 assignments are reviews; however, I add additional assignments to give you additional practice. After that, each week we are going to apply MATLAB to different applications, there are total of 10 applications.

The most important thing to do the first week is to meet your classmates & form a team of 2.

For Hybrid class: on the first day of class, I will make time for you to chat with each others & form a team of 2, do seating assignments in the class room.  It is important to reach out to your classmate, because I treat each assignment like a test, as an instructor, I will not help you to find the solution for the test; however, you can reach out to your classmate, chat & compare notes, just no copy & paste.

 (Note: some of you like to go SOLO, it is OK. However, when you go SOLO, you are really on your own; if you need help, I am going to ask you to reach out to your classmate).

Assignments are due every Friday by 11:59pm. Each assignment will be posted at least 1 weeks in advance. So, your strategy is to stay on top of schedule, never fall behind. If you are ahead of schedule, you have plenty of time to work out the problems, you are going "Down Hill"; if you are behind schedule, you don't have time and therefore rushing, you are going "Uphill". Believe it or not, going "Down Hill" is much easier than going "Uphill"!

I have dedicated this website for our class. It has all detailed instructions and rubric for each assignment for this class including all the resources that you need to complete your tasks.

Enjoy the class!

Coach

Course Format / days / times & location:

 Class #14695 (Hybrid) : Thu  3:00pm - 3:50pm @ T1-112

Office Hours:

@ the end of each class

Phone: (use email)

Email: ui.luu@gccaz.edu

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Common Q & A

Q1. Will you have exams or tests in this class?

A1. Every assignment and project is treated as a test.  Assignments are due every Fridays 11:59pm, they are posted at least 1 weeks in advance, so you have plenty of time to work out any problems, if you run into problems, compare notes with your teammates, just NO copy & paste.

There is NO final exam, just weekly assignments

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(for In-Person Class only)

If you don't feel well:

1. Email me (before class) that you don't feel well (you don't need to provide me any medical info), stay home and do assignments Online

2. Get well. There is no rush, only go back to class when you are well. 

Note: strict Online Assignments policy: 

If students don't submit assignments in 14 days, they will be dropped from the course

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Assignment #0: Syllabus Quiz (using Canvas)

Post 8/27, due on the first day of class (8/27)

(Note: You must complete the Syllabus Quiz on the first day of class or you be dropped from the class as "NO SHOW"

I will dedicated 15 minutes on the first day of class for you to complete this assignment.

Go to Canvas / Click on Quizzes / Assignment #1: Syllabus Quiz

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Murphy's law: 

Email never has a time delay until you submit it on Friday evening!

Then there will be a time delay, I may not receive it until Saturday morning and your assignment will be counted as late!

 Solution: 

option a: provide the screenshot of when the assignment was sent, I will credit your assignment as "On time".

option b: submit on Thursday evening!

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Install MATLAB

Maricopa Community College District has acquired a Campus-Wide License to MATLAB, Simulink, and over 100 additional toolboxes. Students and faculty are covered by the Campus-Wide License and can install software on their home or laptop computers.

New MCCCD portal URL: https://www.mathworks.com/academia/tah-portal/maricopa-community-college-system-31495938.html

Access instructions:

1. Go to Maricopa Community College System’s MATLAB Portal to download the software.

§ If you have MATLAB installed on your Maricopa owned devices, no installation changes are needed.

§ Existing Mathworks accounts will be transitioned from GCC's instance to MCCCDs instance before the GCC MATLAB account is retired.

2. Click “Sign in to get started” under the Get MATLAB and Simulink section.

3. If you have not done so already, you will be asked to create a MathWorks account. Once registered, you will be associated to our MATLAB license and will be able to:

§ Download and activate software on your personal computer

§ Start using MATLAB Online from a web browser

For additional training, please view free online courses that can also be found on Maricopa Community College System’s MATLAB Portal under “Learn to Use MATLAB and Simulink.”

If you have trouble installing MATLAB, go to the MATLAB Portal and click “Need Installation Help” to get support.

PLEASE NOTE:

For the other existing MATLAB portals within Maricopa Community Colleges (Mesa Community College, Chandler-Gilbert, Paradise Valley, and Glendale Community College): These portals will no longer be available by the end of the calendar year. There are notices on these portals referring existing users to Maricopa Community College’s portal listed above. Moving forward, all users should transition to using the portal above to access MATLAB after the end of the current Fall 2023 semester. 

Once installed, to access MATLAB Online, use web browser: https://matlab.mathworks.com/

Table of Content

(see links to assignments below)

Week #1 (8/27)  Assignment #1 / Checking MATLAB: post 8/27, due in class

Week #2(9/3) Assignment #2 / Solving Quadratic Equations: post 9/3, due 9/11

Week #3(9/10) Assignment #3 / Solving 3 Equations 3 Unknowns: post 9/10, due 9/18

Week #4(9/17) Assignment #4 / 4 Subplots: post 9/17, due 9/25

Week #5(9/24) Assignment #5 / Complex number & Application #1: Circuit Analysis (post 9/24, due 10/2) 

Week #6(10/1) Assignment #6 / Application #2: Simple Missile Guidance  (post 10/1, due 10/9) 

Week #7(10/8) Assignment #7 / Application #3: Create User-defined Function (post 10/8, due 10/16) 

Week #8 (10/15) Assignment #8 / Application #4:Using If statement   (post 10/15, due 10/23) 

Week #9 (10/22) Assignment #9 / Application #5: Logical Operations (post 10/22, due 10/30)

 week #10 (10/29) Assignment #10 / Tracking Speed of a Falling Bowling Ball @ Eiffel Tower (post 10/29, due 11/6)

Week #11 (11/5) Assignment #11 / Satellite Orbit  (post 11/5, due 11/13) 

Week #12 (11/12) Assignment #12 / Bullet Speed (post 11/12, due 11/20) 

Week #13 (11/19) Assignment #13 / Projectile Problem (post 11/19, due 11/27) 

Week #14 (11/26) Thanksgiving holiday/ No class

Week #15 (12/3)  Experiment (demo only, report not required): Using AI to solve Satellite Orbit Problem for Assignment #11

Last Assignment: One Thing  (post 12/3, due 12/11)

Week #16 (12/10) :No Class

No Class on 12/17

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Assignment #1 Checking MATLAB (link)

Post 8/27, due in class

late 9/5 12:01am -9/6  11:59pm

Game Over : after 9/6 11:59pm: 0 point

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Resources for Assignment #2

Create New Script

YouTube Video : Create New Script / Coach (5:48)        PowerPoint: Create New Script

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(For convenience) Set "Compact Line Spacing" for Command Window

Solve Quadratic Equation using MATLAB script 

Quadratic Equation (text file)

YouTube Video : Solve Quadratic Equation / Coach (4:27)        PowerPoint: Solve Quadratic Equation

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Assignment #2: Solving Quadratic Equations (link)

post 9/3, due 9/11

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(Optional) Additional Practice #1 ( No report required)

Create an M-File(Script) to calculate the Acceleration of a Spacecraft Voyager 1

Run your script, compare notes with "Spoiler/Solution"

Physics:  

Force: F = ma    (m: mass, a:acceleration)

Work: W = F * d  (F: force, d= distance)

Power = W/t  (W: work, t: time)

Power = F * d/t = F*v  = m*a*v  (v: velocity)

Given:

mass = 721.9 kg

Power = 335 Watts

Velocity = 16,650 m/s

Calculate:

Acceleration (unit in m/s^2)

Spoiler/Solution

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Resources for Assignment #3

Solve 3 Equations 3 Unknowns (text file) 

Video (7:42): Getting Started for Assignment #3

Assignment #3 / Solving 3 Equations 3 Unknowns(link)

 post 9/10, due 9/18

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Solve 5 Equations 5 Unknowns (text file) / (for additional practice only, NO report required)

Spoiler / Solutions (5 equations 5 unknowns)

Solve 7 Equations 7 Unknowns (text file) / (for additional practice only, NO report required)

Spoiler / Solutions (7 equations 7 unknowns)

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Plots

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Exercise Plot1 (text file) 

(Note: This exercise is for practice only, NO report required)

Video (6:37) / Intro for Exercise Plot1    Intro Plot1.ppt

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Exercise Plot2 (text file) 

(Note: This exercise is for practice only, NO report required)

Video (2:50) / Intro for Exercise Plot2    Intro Plot2.ppt 

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Exercise Subplot1(text file) 

(Note: This exercise is for practice only, NO report required)

Video / Intro for Exercise Subplot1    Intro Subplot1.ppt 

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Assignment #4 / subplots/ Starter Template

Video (7:24)/ Intro for Assignment #4 / 4 Subplots  

Assignment #4 / 4 Subplots(link)

post 9/17, due 9/25

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Common Q &A

Q1.  x is an array.  MATLAB refuses to work when I program: y = x^2.  Help!

A1. Because x is an array, MATLAB refuses to work unless you put a "." in front of "^" 

y=x.^2

(Replay the Video, watch & listen closely)

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Assignment #5 / Circuit Analysis(link)

(post 9/24, due 10/2)

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Application: Simple Missile Guidance

Math for Simple Missile Guidance (link)

Simulation Demo (2:51) (link) 

Solutions / Missile Guidance using MATLAB (text)

Assignment #6 / Simple Missile Guidance(link)

(post 10/1, due 10/9)

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Application #3: Create User-defined Function

% function: poly(x)

function output = poly(x)

disp('x=')

disp(x)

output = 3*x^3 + 5*x^2 - 2*x + 1;

end

% using function: poly(x)

clear;

clc;

a= 4;

poly(a)

% using function: poly(x) with multiple inputs

clear;

clc;

for a= [1,2,3,4]

   poly(a)

end

User defined function: launch_angle(link)

Using launch_angle (link)

Assignment #7 / Application #3: Using User-defined Function launch_angle (link)

(post 10/8, due 10/16)

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Using if statement to make MATLAB "smart"

% if_statement_example_01

clear

clc

disp('Example 01: using if statement')

disp('Calculate q= a/b')

a= 4

b= 0

if(b~=0)    % ~= means NOT equal

   q=a/b

end%note: if... end always goes in pair

if(b==0)    % note: to compare, must use 2 equal sign"=="

   disp('Hey! I do NOT like divide by 0, use other non-zero number')

end

% if_statement_example_02_tennis

clear

clc

disp('Tennis Strategy:')

for zone = [1,2,3,4]

disp('zone=')

disp(zone)

if(zone==1)

    disp('Approach backhand slice down the line, ready for volley')

end

if(zone==2)

    disp('Approach forehand slice down the line, ready for volley')

end

if(zone==3)

    disp('Backhand topspin')

end

if(zone==4)

    disp('Forehand topspin')

end

end % for loop

Assignment #8 / Application #4:Using If statement  (link)

 (post 10/15, due 10/23 

Example to make launch_angle.m smart

%---------------------------------------------------

%******** smart ****

if(v1<v2)

% 13. cos(theta2)  (theta2 is the launch angle)

%display('13. cos_theta2:')

cos_theta2 = v1x/v2;

%------------------------------------------------

% 14. launch angle: theta2 (in degree):

%display('14. *** the solution: launch angle theta2 (in degree) is:')

theta2 = acosd(cos_theta2);

output = theta2;

end % if(v1<v2)

%**********************************

if(v1>v2)

   output = 'Drone is too fast! Go straight to Miller Time!';

end % if

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Week #9 / Experiment with Logical Operations

% logic_not.m

% experiment: logic NOT (inverter)

clc

for a=[0,1]

   disp('if input a=')

   disp(a)

   disp('The output of NOT logic is:')

   y=~a     % ~ means NOT

end

% logic_and.m

% experiment: logic and

clc

for a=[0,1]

   for b=[0,1]

       disp('if input a=')

       disp(a)

       disp('if input b=')

       disp(b)  

       disp('The output of AND logic is:')

       y= a & b

   end

end

% logic_or.m

% experiment: logic or

clc

for a=[0,1]

   for b=[0,1]

       disp('if input a=')

       disp(a)

       disp('if input b=')

       disp(b)  

       disp('The output of AND logic is:')

       y= a | b    % | means or

   end

end

% logic_xor.m

% experiment: logic xor (exclusive or)

clc

for a=[0,1]

   for b=[0,1]

       disp('if input a=')

       disp(a)

       disp('if input b=')

       disp(b)  

       disp('The output of AND logic is:')

       y= xor(a,b)    % xor means exclusive or

   end

end

Assignment #9 / Application #5: Logical Operations /Dating Game(link)

(post 10/22, due 10/30)

% logic_dating_game.m

% experiment with logical operations

clc

disp('inputs:')

susan = 0

lisa = 1

ticket = 1

disp('outputs')

date=xor(susan,lisa)

dinner = date

concert = ticket & date

movie = ~date

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Assignment #10 / Tracking Speed of a Falling Bowling Ball @ Eiffel Tower(link)

(post 10/29, due 11/6)

Given:

Eiffel Tower: height = 300 m

acceleration due to gravity: g= 9.806 m/(s^2)

At the top of Eiffel Tower, we release a bowling ball.

(1) Find time it takes to hit the ground: tHit = ?

(2) Calculate the speed of Bowling Ball in (m/s) and (mph) with the following time interval 0.1*tHit

range (0 :  0.1*tHit : tHit)

(3) Top graph: Speed of Bowling Ball in (m/s)

(4) Bottom graph: Speed of Bowling Ball in (mph)

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Physics:

h = 0.5 * g * (tHit ^2)

tHit = sqrt(2 * h / g)

Speed: v= g*t  (m/s)

v_mph = v * 2.23694  (mph)    (Note: 1 m/s = 2.23694 (mph)

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Satellite Orbit

Low Earth Orbit (LEO):
Satellites in LEO, like those used for communications or Earth observation, travel at high speeds and complete an orbit in about 90 minutes. 

Medium Earth Orbit (MEO):
Satellites in MEO, such as those used for GPS navigation, have a longer orbital period than LEO satellites. 

Geostationary Orbit (GEO):
Satellites in GEO, like those used for weather satellites or television broadcasting, appear to stay in the same position relative to Earth because they orbit at the same speed as the Earth's rotation. 

Assignment #11 / Satellite Orbit(link) 

(post 11/5, due 11/13)

% sat_orb_speed_vs_altitude.m

clc

h_km = 40000    % unit : km

h = h_km *1000  % unit : m

Re= 6370000     % unit: m

GMe=3.99*10^14   % unit: m^3/s^2

v=sqrt(GMe/(h+Re))

v_km_per_s = v/1000    % unit: km

v_mph = v * 2.23694    % unit: mph

v_mach = v_mph/768     % unit: Mach, 1 Mach = 768 mph

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Assignment #12 / Measuring Speed of Bullet (link) 

(post 11/12, due 11/20)

% bullet_speed_vs_height

clc

disp('4/16/2024 ECE105 / Usane Bolt')

% given:

g=9.806

m1=0.01 % unit: kg

m2=150  % unit: kg

h1 = 1  % unit: m

for h2=[0.7, 0.6, 0.5,0.4]

   disp('----------------')

   disp('h2=')

   disp(h2)

   v1=sqrt((2/m1)*(m1+m2)*g*(h1-h2));  % unit: m/s

   v1_mph = v1*2.23694   % unit: mph

   v1_mach = v1_mph / 768  % unit: mach #

end

Assignment #13 / Projectile (link) 

post 11/19, due 11/27

% SPOILER: projectile distance vs angle: example @ theta = 10 degree

clc

disp('4/23/2024 ECE105 / Usane Bolt')

% given:

g= -9.806;   % unit: m/s^2

v0_mph=200   % unit mph

v0= v0_mph/2.23694 ;  % unit: m/s

theta = 10  % unit: degree

vx0= v0*cosd(theta)  % unit: m/s

vy0= v0*sind(theta)   % unit: m/s

vx=vx0;  % note: vx is constant, no influence from gravity

% At landing, t= t_land, y=0

% note: y= 0.5 * g*t^2 + vy0*t = t(0.5*g*t + vy0)

t_land = -2* vy0/g

x_land= vx* t_land   % unit: m

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Course Evaluation

ECE105 / Section #14695

Class time will be allocated for course evaluation at the end of semester:
Fall 2026 Engineering Student Course Evaluation (link)(post 12/3)

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Last Assignment/ One Thing (link)

(post 12/3, due 12/11)

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