It has been said before but it bears repeating: Writing defect-free software is exceedingly diffi cult. Proof of correctness of real systems is still well beyond our abilities, and specifi cation of behavior is equally challenging. Predicting fut

研究火灾发生时楼梯等地点容易产生拥堵的地方的人流研究，给出最佳路径-FireEscape A Genetic Programming Approach to the Optimization of Building Evacuations Contribute to the FireEscape program now Abstract Many evacuation routes are drawn without considering traffic flow patt