摘要
以快速傅立叶变换(FFT)求出DNA序列功率谱后,用重复计算实验的办法,对大量DNA序列中核苷酸的分布情况进行统计,得出综合考察变量,然后以核苷酸分布频数和DNA序列长度为自变量,建立Z-curve映射规则得到DNA序列信噪比的新模型,并进行实例分析。新模型不需要对序列进行离散Fourier变换(DFT),而且不要求DNA指示序列长度必须为3的倍数,应用范围更大。
Fast Fourier Transform （FFT） was used to get the power spectrum. By means of repeating computational experiments, the distribution frequency of nucleotides distribution was statistically analyzed in a large number of DNA sequences to get a aggregate variable. Then let the distribution frequency and the length of the DNA sequence be the independent variable,the SNR under Z-curve was calculated to establish the new model, which avoids the constraints of DNA sequence length and Discrete Fourier Transform （DFT） in traditional methods,so it＇s easy to popularize.
出处
《广西科学院学报》
2013年第1期11-13,16,共4页
Journal of Guangxi Academy of Sciences
关键词
信噪比
基因预测
数字映射
功率谱
signal-to-noise ratio, gene prediction, digital mapping, power spectrum
