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  • MyPillowTalks's Avatar
    19,954 posts since Nov '06
    • No problem

      I guess the question wants to test the student's knowledge on manipulating matrix equations, and wants the students to know that a matrix cannot be "divided", and have to use the inverse property.

      I have added in some more details and fit the document into a single page pdf file and it can be downloaded here

      Edited by MyPillowTalks 05 Jun `17, 9:46PM
  • MyPillowTalks's Avatar
    19,954 posts since Nov '06
    • Hello

      It has been some time since I did engineering maths, I am quite rusty.

      • Can I know if there are any values for Matrices A and B?
      • Is this question asked in a general scenario?
      • What level (Nitec/Higher Nitec/Diploma/Degree?) of engineering maths is this question aimed at?
      • My solution is as follows, may not be right/what you are looking for.
      • I tried on MATLAB using a few "randomly made up" matrices for A and B, and i solved for X using my solution. The value of X that i found agrees with the equation (AX - BA = I_m) given in the question.

       

      Edited by MyPillowTalks 04 Jun `17, 7:31AM
  • MyPillowTalks's Avatar
    19,954 posts since Nov '06
    • Ok, now that you have revised, you should really try to sit down and do the TYS.

      The best way is to do it without looking at the solution first.

      You know what you know or don't know when faced with a blank piece of paper and pen. This is a scary and depression situation, thus it is better to do this long way before the exam so you can learn.

      See if you can link the concepts and come up with the maths equation on your own, to model the problem in the question.

      If you can, try it with other questions, different scenarios.

  • MyPillowTalks's Avatar
    19,954 posts since Nov '06
    • I tell u ah....10 years ago hor, i only sec 2.
      I also keep fail my sec 2 maths, 38-40 marks overall.
      My school don't allow me to take A maths in sec 3.

      Last time i also duno how study maths, I take the txtbk read one day before the exam then go exam. Come out fail i also duno why.

      Teacher keep write careless, see me after school, redo, attend remedial class.

      Teachers have to teach 40 students, cannot cater to one student during class, they have to try very hard to explain over the chit chatting, and hopefully all of the 40 students understand what they are talking about, and hopefully all students can follow.

      -----

      One way to start is to read about the syllabus here: http://www.seab.gov.sg/content/syllabus/nlevel/2017Syllabus/4045_2017.pdf

      Eg. Page 4, the paper write certain part have been underlined and will only be tested on Section B of paper 2.

      From the document, know the focus of the topics that are going to be tested

      ----

      Studying is like flirting with girls, doing only one type of question is like flirting with the girl sitting next to you in class.
      Doing simple questions from textbook is like flirting with the girl in another class who is very dao.
      Doing TYS is like trying to flirt with girls from different class with different personalities, while their boyfriend around them. Thus you need to know what the girl(question) actually wants, be careful of the boyfriend (tricks in questions), and what the girl mean when she say something (question asking in different manner).

       

      The more girl you flirt with, the better you are with girls.
      The more maths question you do, the better you are with maths.

      Yes, can practise by doing the Ten Years Series.
      When practising TYS, try to do topic by topic, focus on one topic at a time.

      1. Revise the topic you want to attack first.

      • Revise means know the objective and concepts of each topic.
      • Eg. Trigonometry: Know how to calculate all the angles, lengths
        TOA = Tangent of angle = Opposite length of angle divide by Adjacent length of Angle, Area of Triangle = 1/2 AB sin C. Draw out the triangle and label it.

      2. Try out simple examples from textbook/worksheet.

      • Look at past worksheets/homework that you did and the mistakes you made (hopefully you filed them properly and did the correction)
      • Eg. Find length of the hypothenuse using pythagoras theorem

      3. Try out some harder questions

      • Look at past test that you did, hopefully u did corrections and filed them properly
      • Eg. A librarian placed his ladder 0.5 meters away from the book shelf. The ladder is slanted in a way that it makes an angle of 45 degrees with the floor and rest on the book shelf. Given the length of the ladder is 150 cm, find the height of the wall that meets the ladder.
      • Realise 0.5 meters and 150cm, should you convert them to either cm or meter? Can you draw out the scenario and translate them into a right angle triangle? Should you use TOA, CAH or SOH? If i want to use TOA, CAH, SOH, what angles do i need? What if now i give another angle?

      4. Try out some TYS questions on the topic you revised

      • Compare the different questions and see what the fundamental concept that they are testing. Concept is important, concept will help you remember the formulae. And help you to apply in different questions.

      5. Write a summary on the topic you revised

      • Staple your revision notes with the questions you did with the revision.
      • Keep it safe in a file at home.

      6. Photocopy a set of your revision notes and keep the original safe at home in a file. Put fire extinguisher in your room if needed.

      • Sometimes teachers not happy you studying during their class, will confiscate your notes and throw away. 
      • Teachers assume you reading nonsense and throw away your notes
      • Some teachers think they got bachelor degree and masters degree very big.
      • Friends see you study not happy, steal your notes and ownself get A.
      • One way to deal with teachers is through their ricebowl/livelihood


      By doing so, your brain will automatically see how the topic evolve from simple concept into simple example, and finally how they twist the question into a more complex form. After which, the TYS will show how they twist the complex form in many ways.

      Edited by MyPillowTalks 04 May `17, 11:34PM
  • MyPillowTalks's Avatar
    19,954 posts since Nov '06
    • I hope students will get to learn chinese (if they are chinese) with different dialect together in schools. But make the dialect non-examinable, just for knowledge

      Maybe Primary 1 -3  learn chinese with a dialect eg. hokkien, primary 4-6 learn chinese with canto/teochew/ etc

      Then secondary school time learn English with Malay, or maybe tamil, but make those extra languages non-examinable

      Maybe tertiary can have other language like russian german french etc

      Next time want go out of sg to earn money maybe easier to communicate.

       

  • MyPillowTalks's Avatar
    19,954 posts since Nov '06
    • Very interesting, but I am very not familiar with the topics and concepts he discussed. My level of physics not there yet....

  • Moderator
    MyPillowTalks's Avatar
    19,954 posts since Nov '06
    • icon_lol.gif

      My laptop has a Msata slot. I will be getting a MSATA SSD to install the operating system, and then another typical laptop HDD to use as storage.

       

       

      HDD at top left hand corner, i will install an SSD at the "SSD" location icon_lol.gif

      Laptop still new, Year 2013....hopefully can tahan till i graduate

       

      Then again, I have some concern about the issues SSD have, such as This , and this

      Edited by MyPillowTalks 05 Jan `17, 3:03PM
  • Moderator
    MyPillowTalks's Avatar
    19,954 posts since Nov '06
    •  

      So my laptop BSOD while i was working halfway on my FYP

      When restarted, heard the HDD "Beeping", and my bios didn't detect any hardisk, as shown in the video here: https://www.youtube.com/watch?v=VRRj8L8y6QQ

      Took out the Hard disk, a Western Digital Black 750GB:

       

      Lifting up the label as shown so i could gain access to the screws.

      The warning on the labels says will void warranty, but i saw my degree inside the hdd so i just open up

       

      The screws are Tox size 6, these are my tools:

       

      After opening, indeed, the head and actuator arm thingy is stuck:

       

      I used the same tox 6 screw and manually spin the disk, while simultaneously use the small hook to pull the actuator arm and shifted it back into the parking position. Be careful not to scratch the disk.

      I followed this youtube tutorial: https://www.youtube.com/watch?v=F5Y7BniaRXg

      Pulled it back to parking position:

       

      Closed the HDD back and Prayed hard.
      Was relief to see the windows loading screen:

      After backing up the data, im gonna change a new hardisk

       

  • MyPillowTalks's Avatar
    19,954 posts since Nov '06
  • MyPillowTalks's Avatar
    19,954 posts since Nov '06
    • Originally posted by Mouth_Lemonade ><:
      @MyPillowTalks Thank you for guiding me and also my friends say it is easier to get into NUS Mechanical Engineering part time course than NTU. Is it true? Do you have any idea on this? And part timers have to learn more than half of the modules by themselves is it? 

      Hope you can help me :(

       

      I am not sure if it is easier to get into NUS or NTU, i do not know their selection criteria.

      However, from personal opinions and what we "see", GPA of 3.3 seems to have a high chance of getting into the NTU part time course. However this is just our "opinions" and from what we "gauge", u have to try to apply to know if they accept you. Must try to apply.....

       

      I just asked my friends from NTU Mechanical and Aerospace Engineering, they said that the professors will teach the module. Each lecture is about 3 hours, two lessons per week i think. 7-10PM. Tiring.

      However, as they are trying out some new online learning platform, some lectures will be online, meaning the lecture video is prerecorded, and halfway through the lectures there will be some questions which must be answered before u can move on with the next part of the lecture.

      What is important is to have friends (part time/full time doesnt' matter) who will sit down and discuss together nearing to the exam period/quiz period. Must network very big, must have access to many resources and tips.

      Edited by MyPillowTalks 18 Nov `16, 8:02PM
  • MyPillowTalks's Avatar
    19,954 posts since Nov '06
    • Hello

      You have to try it out and apply for it.

      Sometimes they might call you for interview or may accept you. My part time friends from NTU EEE have GPAs that are not high also.Thus, better to try applying, you might just get it. If you know what i mean.

      Part time studies is quite difficult in my opinion, lectures are about 3 hours, and that is after a long day at work. Sometimes during lecture phone ring got call from work.

      Exam may fall on weekdays and thus you may need to take leave for exam, or take leave to take time to prepare for exam

      Sometimes i study with part time students as well, help each other with assignments or tutorials and past year papers.

      Some part timers who have family have to sacrifice family time to study during weekends for the exams.

      Most important for fulltime/part time is to have a group of friends who can study tgt and help each other during exams/quiz. Else very hard in uni.

       

  • MyPillowTalks's Avatar
    19,954 posts since Nov '06
  • MyPillowTalks's Avatar
    19,954 posts since Nov '06
    • Originally posted by Daren88:

      Well that why I am still learning so that I wont become a danger on the road. If not need test for what. Can anyone tell me what is engine brake please

      Means to slow down the vehicle by the means of the engine and gears.

      Assume at 50km/h, usually at 4th gear, you are approaching a junction. Instead of using the footbrake, u slow down the vehicle by downshifting the gears, from 4th, to 3rd, then 2nd, without stepping on the throttle

      Since ur engine will try to idle at approx 1krpm without stepping on the throttle, u will feel the vehicle slow down as ur gear goes lower + engine trying to idle back to 1krpm.

  • MyPillowTalks's Avatar
    19,954 posts since Nov '06
    • Can i teach these subjects boh? I am familiar with the memorising styled learning in singapore.

  • MyPillowTalks's Avatar
    19,954 posts since Nov '06
  • MyPillowTalks's Avatar
    19,954 posts since Nov '06
  • MyPillowTalks's Avatar
    19,954 posts since Nov '06
    • When i did my Literature, I was told to use the PEE approach.
      Point, Evidence, Explanation + Link back to question.

       

  • MyPillowTalks's Avatar
    19,954 posts since Nov '06
  • MyPillowTalks's Avatar
    19,954 posts since Nov '06
  • MyPillowTalks's Avatar
    19,954 posts since Nov '06
    • exam coming so stress

      should just buy fake degree and go work as electrical engineer.

       

  • MyPillowTalks's Avatar
    19,954 posts since Nov '06
  • MyPillowTalks's Avatar
    19,954 posts since Nov '06
    • So How? Many months liao

      This experience will be good when u think back 10 years later, u will laugh at this memory.

      Not happy can keep track of the DM, during his funeral go create trouble act like ghost or act like the DM spirit entered ur body then u take the cane anyhow walk.icon_lol.gif

      U know mr bean got one new episode he make the coffin drop on the floor?icon_lol.gif

  • MyPillowTalks's Avatar
    19,954 posts since Nov '06
    • Hanor hanor. Times are bad, forums also inactive, bank account very active money keep depleting.

      How to buy caipng liddat?sad.png

  • MyPillowTalks's Avatar
    19,954 posts since Nov '06
  • MyPillowTalks's Avatar
    19,954 posts since Nov '06