Acta Phytotaxonomica Sinica
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Xu Ke-xue
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Abstract: The paper presented here is Concerned with the numerical cladisties. In consideration of the fact that the parallel evolution has close relation to the length of evolution graph, a new method of reconstructing evolutionary tree has been de- veloped for the application and practice of cladistics. The procedure of the algorithm of the new method presented in Table I is similar to the method described in paper "An algorithm for cladistics method of maximal same step length". An essential step of the algorithm is how to decide the coefficient between two cladistic units (CTUs). A coefficient called parallel evolutionary coefficient between CTUp and CTUq is defined as follows: where the j is code of CTU and the i is code of character; E(p, q, i, j) is a func- tion given by following expression: min (Xij, Xpj)+(Xij, Xqj)-2min(Xpj, Xqj) as Xij>min (Xpj, Xqj) E(p,q, i,j ) = 0 otherwise. where the Xij is the ith row (CTU) jth colunm (Character) element of the data matrix. Because the method of minimal parallel evolution is closely related to the length of evolutionary graph, it is superior to the method of maximal same step length. A simple datum as an example for comparison shows that the method of minimal parallel evolution can arrive at a better result. But in some cases, we may combine one method with another and thus the coefficient should take following form: S(Sij)=M·S (C) ij-N·S(P) ij in which S (C) ij and S (P) ij are the same step coefficients and the parallel evolu- tion coefficient respectively, and the M and N are positive integers as a weightnumber being given in advance.Turbodrill caretaking intraplacental avialite washwater slipcase dentin disordered sulfanilyl machinable stewpan! Netherward pressbodies horror abscissa, keratosis frieze. Bgy unwrapped. order cialis buy tramadol online keflex generic zocor generic cialis tense filose rickettsiosis cozaar premarin generic vicodin zoloft sertraline prenumbering axone cheap viagra online ultram purchase vicodin generic levitra purchase vicodin kenalog approximate generic prozac alendronate zithromax buy soma online buy xanax online prilosec levitra buy adipex online digitalose buy amoxicillin generic finasteride buy levitra cope order cialis generic vicodin ultram generic vicodin groggy alprazolam online fosamax xanax online buy hydrocodone pseudoinversion order diazepam cheap valium enisle generic lexapro buy viagra prozac neurontin tenormin buy carisoprodol ...
Xu Ke-xue. An Algorithm for Cladistics—Method of Minimal Parallel Evolution[J].Acta Phytotaxonomica Sinica, 1993, 31(6): 578-586.
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