You and Your Research

http://www.paulgraham.com/hamming.html

Talk at Bellcore, 7 March 1986 The title of my talk is, ``You and Your Research.'' It is not about managing research, it is about how you individually do your research. I could give a talk on the other subject-- but it's not, it's about you. I'm not talking about ordinary run-of-the-mill research; I'm talking about great research. And for the sake of describing great research I'll occasionally say Nobel-Prize type of work. It doesn't have to gain the Nobel Prize, but I mean those kinds of things which we perceive are significant things. Relativity, if you want, Shannon's information theory, any number of outstanding theories-- that's the kind of thing I'm talking about. Now, how did I come to do this study? At Los Alamos I was brought in to run the computing machines which other people had got going, so those scientists and physicists could get back to business. I saw I was a stooge. I saw that although physically I was the same, they were different. And to put the thing bluntly, I was envious. I wanted to know why they were so different from me. I saw Feynman up close. I saw Fermi and Teller. I saw Oppenheimer. I saw Hans Bethe: he was my boss. I saw quite a few very capable people. I became very interested in the difference between those who do and those who might have done.

[转载]Matlab向量化优化小结

转自：http://hi.baidu.com/bittnt/blog/item/a97fdc03d7bdf67d3812bb4f.html

1、给定一个列向量v1，和一个行向量v2, 计算矩阵M，使得M(i, j) = v1(i) + v2(j)。一种常用的向量化实现：m = length(v1);
n = length(v2);
M = repmat(v1, [1, n]) + repmat(v2, [m, 1]);