Jifeng Wu
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From the Fourier Series to the Fourier Transform to the Discrete-time Fourier Transform: Demystifying the Formulas

In realms as broad as electrical engineering, acoustics, optics, signal processing, quantum mechanics, and econometrics, the Fourier Series, Fourier Transform, and Discrete-time Fourier Transform play
2023-09-04
Mathematics

On Convolutional Neural Networks and Photographic Lenses

Convolutional neural networks are camera lenses to a computer. The analogy does not stop at the point that both compress visual information: The evolution of convolutional neural network architectu
2023-08-24
Reflections

Our Motivation for Maintaining Our Blog

今之博客,乃昔(初高中)之错题本之翻版也。昔之背景知识、解题思路、高效算法,今之认识、洞见,皆为辛苦求索所得,故笔录之,以期日积月累,唯“应试”“科研”之直接目的异也。 This blog is a replica of our previous “problem books” used for junior and senior high school. In the past, we woul
2023-08-16
Reflections

Timetable of Well-known Conferences in Different Subdomains of Computer Science

We have compiled a timetable of well-known conferences in different subdomains of computer science based on the Class A and Class B conferences in “Directory of International Academic Conferences and
2023-08-16
Reference

ISSTA/ECOOP 2023 Observations and Gained Insights

Mon 17 JulSession 1 FUZZING at Amazon Auditorium (Gates G20)Welcome and IntroductionsThe following reviewing criteria for workshop papers can serve as a guide for us in writing papers: Is the problem
2023-07-21
Research Inspiration

PNW PLSE Workshop 2023 Observations and Gained Insights

10:30 - TalksLinear Types for Systems VerificationIt is a good idea to embed verification information in type system of a programming language. Verified Program Construction Program verification is ha
2023-05-09
Research Inspiration

Paper Reading: Sized Types

NOTE: This is a Paper Reading for Topics in Programming Languages: Type Systems. The original paper can be found here. SummaryYou can check the presentation that I made for this paper in this GitHub r
2023-03-25
Research Inspiration

Paper Reading: Refinement Types

NOTE: This is a Paper Reading for Topics in Programming Languages: Type Systems. The original paper can be found here. SummaryThis paper presents a clear and organized guide to refinement type systems
2023-03-19
Research Inspiration

Paper Reading: How to make ad-hoc polymorphism less ad-hoc

NOTE: This is a Paper Reading for Topics in Programming Languages: Type Systems. The original paper can be found here. SummaryThe paper first defines and compares parametric and ad-hoc polymorphism an
2023-03-06
Research Inspiration

Type-Theoretic Constructs in C++

Fixed-point Combinators, Tying the Recursive Knot, and Recursive Lambda ExpressionsIn Lambda Calculus, we cannot refer to the Lambda Abstraction itself within a Lambda Abstraction. Similarly, C++ does
2023-03-01
Design Patterns
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