Research on the chaotic characteristics of Spondylis buprestoides(L.) adult population in forest
XU Zhi-hong · Nanjing Linye Daxue xuebao · 2011
Based on chaos theories,the chaotic characteristics of Spondylis buprestoides adult population in forest were identified by power spectrum analysis,correlation dimension,embedding dimension,largest Lyapunov exponent and principal component method,the one dimensional time series of S.buprestoides adult population was extended to multi-dimensional phase space,to obtain the main chaotic characteristics indicators.The results showed that the adult population sequence of S.buprestoides had chaotic characteristics,which was judged by various chaotic determination methods.Attractors were existed in extended multi-dimension phase space,and also there were of fractal dimension characteristics.When the delay time τ=2,the embedding dimension m=12,the correlation dimension D=3.260 9 in related phase dimension and the largest Lyapunov exponent λ1=0.288 6.Therefore the adult population of S.buprestoides could be forecasted by reconstructed phase space method based on one dimension time series' chaotic characteristics.