au revoir from skyharbor..

Folks

 The grades have been posted and you should be able to see them.

The homework 4 is available for pickup from the TA. The final exam has to be kept with me according to university rules.

It was fun teaching you all this semester and I hope to see you around and may be even in other courses.

cheers
Rao

AI homework 4 and project make up

Hi, folks.

If you need to pick up your hardcopy of homework 4 and project make up,
you can stop by my office (BYENG561AC) on Monday and Tuesday
(Dec.18th/19th). I should be around most of the time.

The instructor keeps the copies of final. You need to check with him if
you want to see the final.

Have a good holiday!!
-Lei

Hold--I say--*hold*--the presses (egregious error in the previous cumulatives)...

So it has just been pointed out to me by the ever-watchful TA that I took the midterm grade twice instead of
midterm and final--in computing the exam total and thereby the cumulative. My apologies.

Here I believe are the *real* cumulatives. Also, this does change the "top" person in one of the sections.  They now can
proffer their advice to me about where the grade cutoffs should be... (and my apologies to the person who
had the "Dewey Wins" dejavu--I think he/she did a great job in the class over all).


Rao

ps: By the way, if you were tormented with too much work, just think of the poor TA who had to grade everything you guys did
       (and continued to look out for your interests even in the eleventh hour). Lei more than continues the tradition of
      outstanding TAs for cse471..

Final cumulative ranking (required marks)

Here is the final cumulative ranking according to my Excel (I will have it checked by the TA once but it sort of looks correct).

I will let you in on an early secret.  The very top student in both sections (471 and 598) are guaranteed to get an A+ (although
they both should be chastised for not doing well on the final).

I am willing to hear (hear--not necessarily follow) from them about where the grade cutoffs should be in their sections 
for A+, A, A-, B+, B, B-, C+, C,  D and E. 

Rao

ps: Mails requesting a favorable consideration of your own case will likely result in me thinking unfavorably of you. So, don't do it ;-)

Final exam marks..

Final has been graded. Before witnessing the bloodbath, let us
pause--in the true Bhagavadgita fashion--
and take stock of the big answers ;-)

Here are some general observations:

1. Many people messed up the bomb in the toilet problem.
Here is one complete answer.

1. B(p1,S0) V B(p2,S0)
2. forall s, p B(p,s) => sf(Result(d(p),s))
3. ?sf(s)

1 is already in the clausal form. 2 becomes ~B(p,s) V sf(Result(d(p),s))
3, after negation becomes forall s ~sf(s) which in clausal form is ~sf(s)

You can resolve 3 with 2, and then resolve ~B(p,s) twice with 1 to
get an empty clause

The proof doesn;t give you a plan as it is existential proof.

Backward chaining won't work because the first clause is non-horn!

2. for part two of the flu epidemic question, many people missed the point that
the CPTs already take care of the ignorance and lazyness..

3. The likelihood of Flu in the enumeration question works out to be
about ~0.733

4. In the likelihood weighting question, you ignore the last few
samples since you
have to clamp RN and BA to "False"

5. The answer to how likely is flu on the first day given the
evidence of the kit on the second
day turns out to be ~0.824 [You guys could have used the project 3
applet to check your answers
before submitting ;-)]

6. for the third part of the DBN question, the best way to argue with
your friend is to
point out that belief revision can happen in diagnostic as well as
causal direction.

7. For the Neuman's party, the size of the hypothesis space is
2^(2^3)=256 (where
3 is the number of features of the problem)

8. For the same question, some people used their commonsense rather
than calculations

9. The answers to deep thoughts section made for interesting reading.
Seemed like some people really did
get something out of the course--and that is as apt a gift for the
winter solstice as any..

cheers
Rao

------
(*) Bhagavadgita is considered the Cliff's notes essence of Hindu
philosophy--and it is
a discourse on good and bad between Krishna and Arjuna--two
characters in the Indian
epic Mahabharata--at the outset of the big war--with two opposing
armies pitched and ready to
go at each other. Imagine, if you will, a philosophical discussion
between G.W. and Saddam in the deserts
of arabia, with the republican guard and marines ready to go at each
other once they stop talking..

Hw4 grading details

Below are the statistics of hw4:

HW4	Without Extra Credits(139)
	Mean	Median	Highest
Overall	95.4	106	136
Under	77.4	76
Graduate	109	117

For this homework, as you can see, the full score is very big: 139 + 12(for extra credit)
Note that the weight I finally adopt for grading is a little different as shown in the solution.

P1(30): 3+4+5+6+3++ 3+ 6
P2(15): 3+3+3+3+3
P3(24): 3+3+3+3+6+6
P4(15): 3+3+3+3+3
P5(15): 6+3+3+3
P6(6): 3+3
P7(30): 3+6+3+3+3+3+4+5
P8(4).

Thus, the total is 30+15+24+15+15+6+30+4 = 139.

One common error:
P1, part C to compare p1, p2, and p3.
Lots of students provide p1<=p3 or p3<=p1. Actually, unless you know the exact CPT, both cases are possible. I took 2 pts off for this unless you provide solid justification.

Re: Final Exam

You don't need this information. For perceptrons, it is customary to assume that the learning rate alpha
already contains the gradient information (i.e., just use alpha in place of alpha*gradient_of_activation_fn)


Rao

On 12/10/06, Nanan <nanan9177@gmail.com> wrote:

Dear Dr. Kambhampati,

 

Would you please tell me the activation function of the Neuman's Parties question? Thanks :)

 

Cheers,

Nan