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识别剪切位点的分组权重矩阵方法
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作者 高绍根 李国英 郑伟谋 《系统科学与数学》 CSCD 北大核心 2007年第1期51-58,共8页
提出识别剪切位点的分组权重矩阵方法.分组权重矩阵是一个子总体数未知的混合权重矩阵模型.为得到未知参数的极大似然估计,采用了EM方法,而子总体数是利用隙统计量确定的.作者给出了该方法的具体计算步骤.将该方法应用于人类和水稻... 提出识别剪切位点的分组权重矩阵方法.分组权重矩阵是一个子总体数未知的混合权重矩阵模型.为得到未知参数的极大似然估计,采用了EM方法,而子总体数是利用隙统计量确定的.作者给出了该方法的具体计算步骤.将该方法应用于人类和水稻基因组的供子和受子识别,并与现行的主要方法作了比较.结果表明,分组权重矩阵法的识别效果更为精确. 展开更多
关键词 供子 受子 识别 权重矩阵 最大相依分解 分组权重矩阵模型
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Test Data Sets and Evaluation of Gene Prediction Programs on the Rice Genome 被引量:1
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作者 李恒 刘劲松 +12 位作者 徐昭 金蛟 方林 高雷 李余动 邢自兴 高绍根 刘涛 李海红 李雁 谢惠民 郑伟谋 郝柏林 《Journal of Computer Science & Technology》 SCIE EI CSCD 2005年第4期446-453,共8页
With several rice genome projects approaching completion gene prediction/finding by computer algorithms has become an urgent task. Two test sets were constructed by mapping the newly published 28,469 full-length KOME ... With several rice genome projects approaching completion gene prediction/finding by computer algorithms has become an urgent task. Two test sets were constructed by mapping the newly published 28,469 full-length KOME rice cDNA to the RGP BAC clone sequences of Oryza sativa ssp. japonica: a single-gene set of 550 sequences and a multi-gene set of 62 sequences with 271 genes. These data sets were used to evaluate five ab initio gene prediction programs: RiceHMM,GlimmerR, GeneMark, FGENSH and BGF. The predictions were compared on nucleotide, exon and whole gene structure levels using commonly accepted measures and several new measures. The test results show a progress in performance in chronological order. At the same time complementarity of the programs hints on the possibility of further improvement and on the feasibility of reaching better performance by combining several gene-finders. 展开更多
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