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  • Xing Li
    Xing Li published a blog post SCIE 326 - Unit 15 Notes August 15, 2019 - 11:20am
    （net time : 148 min) empathetical: direction, intuitive feeling to be satisfied; Schrödinger equation analogical: model/structure, more useful in analogy; plum pudding model/solar system model analytical: details, truth criteria to be...
  • Xing Li
    Xing Li published a blog post SCIE 326 - Unit 14 Notes August 7, 2019 - 11:18am
    (net time : 109 min) Unit 14 linear: proportional; exponential: rate of change proportional to the qty. (radioactivity, population, compound interest, cooling) positive: oscillation; negative: stability. feedback in complex systems: negative...
  • Xing Li
    Xing Li published a blog post SCIE 326 - Unit 12 & 13 Notes August 7, 2019 - 11:17am
    (net time : 241 min) Unit 12 scientific facts: empirically true but theory-laden Q5: job search in Canada Q7: Fahrenheit 0: freezing temperature of a solution of brine , 96: human body; Q8: C1/(C1+C2) must between 0 and 1 Unit...
  • Xing Li
    Xing Li published a blog post COMP 361 - Reflection on Assignment 3 August 7, 2019 - 11:14am
    (net time: 332 min)          When I tried to list system inputs, I made a mistake to list web interface, mobile interface and telephone interface as the three different system inputs. However, when I compared it with the...
  • Xing Li
    Xing Li published a blog post SCIE 326 - Unit 10&11 Notes July 17, 2019 - 11:49am
    (net time : 293 min) Unit 10 Advantage of maths: simplicity, economy of effort, generality and precision Q1: axiom? Q2: no need to experiment? Most of the contents are known in statistics courses Unit 11 symmetry: invariance under...
  • Xing Li
    Xing Li published a blog post SCIE 326 - Unit 9 Notes July 17, 2019 - 11:47am
    (net time : 125 min) Unit 9 3 principles: non-contradiction, sufficient reason(everything has a reason: logically, empirically, optimally), identity of indiscernible (depending on the hierarchy level of categories) 4 polarities: (in...
  • Xing Li
    Xing Li published a blog post COMP 361 - Week 11 Notes July 17, 2019 - 11:43am
    （net time : 92 min) Section 3 Database   DBMS = API + query interface + admin interface + programs database = physical data store + schema schema= organization + association + data spec + data control data spec: type, length, location,...
  • Xing Li
    Xing Li published a blog post COMP 361 - Reflection on Assignment 2 July 16, 2019 - 1:39pm
    (net time: 624 min)      I did fast for the use case diagram and the domain model class diagram, but I spent way more time on use case brief description. This is partially because I found more problems in my original analysis when...
  • Xing Li
    Xing Li published a blog post SCIE 326 - Unit 8 Notes June 21, 2019 - 11:46am
    Unit 8 (net time : 105 min) reasoning: the way our minds fit things together.                 empathetical, analogical,...
  • Xing Li
    Xing Li published a blog post SCIE 326 - Unit 7 Notes June 21, 2019 - 11:44am
    Unit 7 (net time : 196 min) rules of professional conduct (behave in certain ways to know the truth): knowledge is public, not to judge by source or faith, include all sources with no bias, honesty, open minded, successful science requires...
  • Xing Li
    Xing Li published a blog post SCIE 326 - Unit 6 Notes June 18, 2019 - 11:25am
    Unit 6 (net time : 151 min) scientific statement: Provide an explanation or causal mechanism of a naturally occurring phenomenon Generate predictions that are testable via observations that are replicable and natural   rationalism:...
  • Xing Li
    Xing Li published a blog post SCIE 326 - Unit 5 Notes June 17, 2019 - 11:26am
    Unit 5 (net time : 129 min) pathological science: low statistical significance, independent of cause, exceptionally high accuracy, revolutionary, ad hoc justification, can’t be reproduced pseudo science: static or randomly change (not...
  • Xing Li
    Xing Li published a blog post COMP 361 - Week 9 Notes June 17, 2019 - 11:23am
    Unit 5 (net time : 219 min) Section 1 Object-Oriented Design   What is OOP: Each object encapsulate program logic + attributes; a set of object cooperate with messages; instantiation = create object in execution; organized at...
  • Xing Li
    Xing Li published a blog post MATH 309 - Unit 1 June 12, 2019 - 12:01pm
    Unit 1 Integer (net time: 190 min) equality 8 axioms: A4M3D1 can lead to P3 of uniqueness               A1. associativity: (k + m) + n = k + (m + n) A2. commutativity:...
  • Xing Li
    Xing Li published a blog post MATH 271 - Unit 2 June 12, 2019 - 11:59am
    Unit 2(net time: 138 min)5.1 Eigen spaceA is invertible ó λ≠05.2 DiagonalizationSimilarity transformation: det(P-1AP) = det(A)Similarity invariant: determinant, invertibility, rank, nullity, trace, characteristic...
  • Xing Li
    Xing Li published a blog post SCIE 326 - Unit 4 Notes June 11, 2019 - 11:46am
    Unit 4 (net time : 99 min) bottom-up: build chemistry but can’t feel wet, top-down: build physiology but can’t define health, physiology physiology vs pathology: macro vs micro atomic and kinetic vs earth, air, fire and...
  • Xing Li
    Xing Li published a blog post SCIE 326 - Unit 3 Notes June 11, 2019 - 11:44am
    Unit 3 (net time : 184 min)question->answer with existing theory, unanswered-> revolution, with constraints (real world, publicly available)ask theoretically: hypothesis is true or consistent, possible prediction, what’s...
  • Xing Li
    Xing Li published a blog post COMP 361 - Week 7 Notes May 31, 2019 - 11:23am
    Unit 4 (net time : 163 min)  Section 1 Overview   Analysis: requirements, what; Design: bridge from requirement to solution, how. The objective of systems design is to define, organize, and structure the components of the final...
  • Xing Li
    Xing Li published a blog post SCIE 326 - Unit 2 Notes May 24, 2019 - 11:46am
    Unit 2 （net time : 114 min)Q2.Q4. science: enterprise that generates coherent understanding about real world, yield testable theories which is relatively true.             ...
  • Xing Li
    Xing Li published a blog post SCIE 326 - Unit 1 Notes May 23, 2019 - 11:51am
    Unit 1(net time: 103 min)scientific point of view: Do not believe anything, but question only what is worth questioninginductive attitude: aims at adapting our beliefs to our experience as efficiently as...
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