送交者: xj 于 2005-3-17, 11:59:39:
回答: 对达尔文进化论的疑问 由 江毅 于 2005-3-16, 23:45:03:
For the first computer simulation. It is actually fairly easy to make sensible word out of 100 random letters. The trick? You have to have some limitation or evolutionary force during the process. I am not sure how other people did the simulation, here is my intuitive way to do it.
For example, let's first randomly generate 3 letters (several pairs). Assuming you have a 1000 letters article (which is sort of environment). The limiting factor is that if the 3 letters can be found adjacent in that 1000 article, i.e., within a word in that article, then the 3 letters survive at probability 1, otherwise, survive at probability 0.5. After a couple 3 letter simulation, you grow one more letter, and repeat the above process. Through a couple simulations, you can get pretty sensible words or sentense fairly easily.