Hi Guys, please comment and let me know what you think about this Operations Research Open Course. Your feedback is really appreciated. If you enjoy the video, please subscribe and share. All my replies here are only related to the content in my own videos. I am afraid I won't be able to answer other questions. Thanks for your understanding.
Hello Yong. I am taking Operations Research course in the university. My lecturer is a good person but he cant really teach. I was so confused in class and thanks to your online course, i can understand what is going on in the class. I am grateful and will post my mark here after my finals. Thank you again!
I have read several booklets and sat in several classes but never did I learn this concept before watching your video. Thanks a million. It was so amazing, easily understandable and completely essential.
Thank You very much Yong. I am a machine learning professional and I can’t thank you for these amazing systematic concepts of Optimisation. I am slowly learning the amazing techniques demonstrated by you. These things do happen in real world where I have to think about optimising multiple things I data science world. Once I understand the concepts I can program everything in Python and put those things in production
Hey Yong, just wanted to get your thoughts on creating some lectures on simulations along with optimisation. The real life problem occurs when we don’t have enough historic data and need to determine the probability distribution of the data and then put them simulate that variable before putting in optimisation problem for an optimal solution.
Hi Wang Yong, I don't get the part at 5:00: How much x1 can be increase. Why rhs / coef? Why chosing the lowest ratio? Appreciate if you could elaborate further. Thanks.
We know x2 is the most effective variable for increasing a, because it has the biggest coefficient. RHS/coefficient is the leaving variable's value as shown in the video. We know that variables is >=0 so our x2 shouldn't
Well basically you have competing inequalities. X1 should be below 9 and also should be below 4.5. so you take the smallest one to satisfy all. Several minutes after 5:00 it becomes clear why. İ hope this helps.
I just couldn't really get the logic behind the minimum ratio test. It might be because of my English level but I would appreciate if you could just explain it a little more.
Hi husam, thanks for the question. An inductive proof of the simplex method is done by Professor Dantzig back in 1960 apps.dtic.mil/dtic/tr/fulltext/u2/224306.pdf
Hi Guys, please comment and let me know what you think about this Operations Research Open Course. Your feedback is really appreciated. If you enjoy the video, please subscribe and share. All my replies here are only related to the content in my own videos. I am afraid I won't be able to answer other questions. Thanks for your understanding.
Plz I need one answer what is enter into the basis and leaving into the basis???
can you share the slide?
Hello Yong. I am taking Operations Research course in the university. My lecturer is a good person but he cant really teach. I was so confused in class and thanks to your online course, i can understand what is going on in the class. I am grateful and will post my mark here after my finals. Thank you again!
thanks. my pleasure
I have read several booklets and sat in several classes but never did I learn this concept before watching your video. Thanks a million. It was so amazing, easily understandable and completely essential.
Thanks, Mahdi
First and the only really simple simplex method lecture I've ever seen.
Thank You very much Yong. I am a machine learning professional and I can’t thank you for these amazing systematic concepts of Optimisation. I am slowly learning the amazing techniques demonstrated by you. These things do happen in real world where I have to think about optimising multiple things I data science world. Once I understand the concepts I can program everything in Python and put those things in production
You’re literally saving me in this class this semester! Thank you!
Thanks for the explanation. It’s so clear and useful.
thanks, yunlu
Excellent explanation, but I have a question: Can the inside variable be an outside variable in the next itreation and what is the reason?
LIFE SAVER‼️‼️‼️
Hey Yong, just wanted to get your thoughts on creating some lectures on simulations along with optimisation.
The real life problem occurs when we don’t have enough historic data and need to determine the probability distribution of the data and then put them simulate that variable before putting in optimisation problem for an optimal solution.
Great Explanation!
Thanks
no problem, wisam
Hi Wang Yong, I don't get the part at 5:00: How much x1 can be increase. Why rhs / coef? Why chosing the lowest ratio? Appreciate if you could elaborate further. Thanks.
We know x2 is the most effective variable for increasing a, because it has the biggest coefficient. RHS/coefficient is the leaving variable's value as shown in the video. We know that variables is >=0 so our x2 shouldn't
@@hosseinfaridnasr2778Shukran, Hossein
Well basically you have competing inequalities. X1 should be below 9 and also should be below 4.5. so you take the smallest one to satisfy all. Several minutes after 5:00 it becomes clear why. İ hope this helps.
Young Wang, at 10:47 I understand, we should make 1 the value 3/2 in R2', instead of computing R2''=2 R2' /3, can we use R2''=R2'-1/2?
This helped a lot but the notation is so different from my book that I'm really confused, we use slack variables, where is x_3 and x_4?
instead writing s1 and s2 for slack var we write x3 and x4 most of book use that
thanks god you helped me a lot!!!
thnx Yong !
you are welcome, ruba
in standard form should we convert max to mix problem ?!
If I have on the denominator of the Ration testing a Negative sign, do i still take it ? Or leave it and only deal with the positive signs ?
Sayed, see the example in 04E: Simplex Method & The Big M ua-cam.com/video/ROkDaBeEiVs/v-deo.html
What is adundent resource and redundent resource and scarce resource?
U r such asaver 💓💓💓
I just couldn't really get the logic behind the minimum ratio test. It might be because of my English level but I would appreciate if you could just explain it a little more.
is there any proof of Simplex Method ?
thank you
Hi husam, thanks for the question. An inductive proof of the simplex method is done by Professor Dantzig back in 1960 apps.dtic.mil/dtic/tr/fulltext/u2/224306.pdf
At 10:22, why R2' RHS=9, not 9/2?
Si, it's already 9/2. I don't see 9
what is EROs?
elementary row operations
tHE bEST vIDEO SO fAR i fOUND aBOUT tHIS tOPICS. bRAVO