小石头工作室 . Stone Studio .

Resources:

Fast Convolution
Covers various implementations of linear convolution using the DFT, including Overlap-Add and Overlap-Save.
Upsampling vs. Oversampling for Digital Audio
An article about the benefits of these techniques.
The Scientist and Engineer’s Guide to Digital Signal Processing
A great practical introduction to DSP. (Free to download)
Information on Gibbs Phenomenon
Wikipedia article on it.

Articles on Sampling below the Nyquist Rate

Sampling [...]

Online Books
Statistics with R by Vincent Zoonekynd, 2007
  It covers 1. Introduction to R 2. Programming in R 3. From Data to Graphics 4. Customizing graphics 5. Factorial methods: Around Principal Component Analysis (PCA) 6. Clustering 7. Probability Distributions 8. Estimators and Statistical Tests 9. Regression 10. Other regressions 11. Regression Problems — and their [...]

1 When can you use the binomial formula?

We want to know how many times something does or doesn’t happen e.g. rolling a
die multiple times:

can use binomial if we want to know “number of sixes”
can’t use binomial if we want to know “sum of rolls”

Many Eyes [FREE]

Many Eyes is a bet on the power of human visual intelligence to find patterns. Jump right to our visualizations now, take a tour, or read on for a leisurely explanation of the project.
 
Tasty Data Goodies – Swivel  [Not Free]

Swivel is a website where people share reports of charts and numbers. Swivel is [...]

Forums, Communities

中国金融学术研究网 是中国最大最好的学术论坛， 里面涵盖最新论文， 资本市场， 公司财务， 银行和金融机构 和 机构研究报告。

 
Research Centre and Organizations
 

The National Bureau of Economic Research is a private, nonprofit, nonpartisan research organization dedicated to promoting a greater understanding of how the economy works. Sixteen of the 31 American Nobel Prize winners in Economics and six of the past Chairmen of the President’s [...]

General DSP Central

dspGuru a lot of good free information on DSP was available, it covers Tutorials, HowTos, Tricks, and more.
TechOnline provides users with a host of education resources, which range from Webinars to online courses to a research library of white papers. At the same time, the site offers engineers the chance to evaluate products [...]

“Linear Phase” refers to the condition where the phase response of the filter is a linear (straight-line) function of frequency (excluding phase wraps at +/- 180 degrees). This results in the delay through the filter being the same at all frequencies. Therefore, the filter does not cause “phase distortion” or “delay distortion”. The lack of [...]

The Truth About the JFK Assassination. Signal Processing Tells The Story.
President John F Kennedy was assassinated in Dallas in November of 1963. Although an investigation soon concluded that only one gunman, Lee Harvey Oswald, shot at President Kennedy, there is a community of skeptics that exist to this day who think that there was [...]