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基于三音子模型连续语音声调识别方法 被引量:1
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作者 魏瑞莹 梁维谦 《电声技术》 2011年第8期34-37,共4页
作为汉语语音识别的重要组成部分,声调识别具有关键的作用。提出了一种新的基于前后文相关的模型识别方法用以提高汉语连续语音中的识别率。首先介绍用于声调识别的基因轨迹的提取和处理,然后提出6种特征来描述基因轨迹的变化趋势并给... 作为汉语语音识别的重要组成部分,声调识别具有关键的作用。提出了一种新的基于前后文相关的模型识别方法用以提高汉语连续语音中的识别率。首先介绍用于声调识别的基因轨迹的提取和处理,然后提出6种特征来描述基因轨迹的变化趋势并给出具体的计算公式,利用这些特征并考虑连续语音中前后音节的相关性对基因轨迹造成的变化而建立细分的声调模型,最后基于这种声调模型采用决策树的分类方法进行声调的识别和测试。 展开更多
关键词 声调识别 基因轨迹 特征提取 三音子模型 决策树
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Comparative mapping of QTLs for Al tolerance in rice and identification of positional Al-induced genes 被引量:7
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作者 毛传澡 杨玲 +4 位作者 郑炳松 吴运荣 刘非燕 易可可 吴平 《Journal of Zhejiang University Science》 EI CSCD 2004年第6期634-643,共10页
Aluminum (Al) toxicity is the major factor limiting crop productivity in acid soils. In this study, a recombinant inbreed line (RIL) population derived from a cross between an Al sensitive lowland indica rice variety... Aluminum (Al) toxicity is the major factor limiting crop productivity in acid soils. In this study, a recombinant inbreed line (RIL) population derived from a cross between an Al sensitive lowland indica rice variety IR1552 and an Al tolerant upland japonica rice variety Azucena, was used for mapping quantitative trait loci (QTLs) for Al tolerance. Three QTLs for relative root length (RRL) were detected on chromosome 1, 9, 12, respectively, and 1 QTL for root length under Al stress is identical on chromosome 1 after one week and two weeks stress. Comparison of QTLs on chromosome 1 from different studies indicated an identical interval between C86 and RZ801 with gene(s) for Al tolerance. This interval provides an important start point for isolating genes responsible for Al tolerance and understanding the genetic nature of Al tolerance in rice. Four Al induced ESTs located in this interval were screened by reverse Northern analysis and confirmed by Northern analysis. They would be candidate genes for the QTL. 展开更多
关键词 Aluminum tolerance Quantitative trait loci (QTL) Expressed sequence tag (EST) Gene Rice (Oryza sativa L.)
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Using genetic markers in unpedigreed populations to detect a heritable trait
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作者 DODDS Ken G. AMER Peter R. AUVRAY Beno■t 《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 SCIE CAS CSCD 2007年第11期782-786,共5页
Before a breeder invests selection pressure on a trait of interest, it needs to be established whether that trait is actually heritable. Some traits may not have been measured widely in pedigreed populations, for exam... Before a breeder invests selection pressure on a trait of interest, it needs to be established whether that trait is actually heritable. Some traits may not have been measured widely in pedigreed populations, for example, a disease or deformity may become more prevalent than previously, but is still relatively rare. One approach to detect inheritance would be to screen a commercial population to obtain a sample of "affecteds" (the test group) and to also obtain a random control group. These indi- viduals are then genotyped with a set of genetic markers and the relationships between individuals within each group estimated. If the relatedness is higher in the test group than in the control group, this provides initial evidence for the trait being heritable. A power simulation shows that this approach is feasible with moderate resources. 展开更多
关键词 Relatedness Genetic markers Heritable trait
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