遗传类

Genetic algorithm is a type of the random search algorithm which relies on the biological options natural genetic mechanisms .

摘要遗传算法是1类借鉴生物界选择和自然遗传机制的随机化搜索算法。

It is interpreted that the correlation structure of the allelic polymorphism data contains null correlations introduced by "closure" and the statistical distribution of the data is not normal because of its constant row sum,which resulted in great difficulties in analyzing the data with traditional multiple linear statistical methods such as principal component analysis,factor analysis,cluster analysis and canonical correlation analysis.

长期以来，对于多维基因多态性数据的多元统计分析，如计算遗传距离时所用的聚类分析、分析群体遗传结构时所用的主成分分析、因子分析和典型相关分析等，一直应用为无约束条件数据而设计的经典多元线性分析方法，并没有注意基因多态性数据的"闭合效应"所带来的问题。

In order to improve the performance and efficiency of parameter identification in complicated environmental models, the genetic algorithm and simplex method are introduced.

为提高复杂环境模型参数识别的性能和效率，引入了遗传单纯形法，该方法融合了遗传算法和单纯形法两类算法的不同搜索机制，具有很强的广度搜索和深度搜索能力。

The length of the band was 0.33~3.0kb.The D value between different breeds of Antheraea pernyi was 0.066~0.1659.The D value was used to construct a dendrogram by UPGMA.

不同柞蚕品种间的遗传差异较小，遗传距离在0.066～0.1659之间，根据D值，由UPGMA聚类分析软件绘制了它们的分子进化树。

The 12940 bp nucleotide sequence of the mitochondrial genome of a brachyura dacapod, Eriocheir japonica sinesis, was determined. The arrangement of 27 genes of the mitochondrial DNA differs from that of the mitochondrial DNA in all other arthropods studied.

中文题名中华绒螯蟹线粒体基因组与16S rDNA遗传标记研究副题名外文题名 The mitochondrial genome of the mitten crab，Eriocheir japonica sinensis(Crustacea：Decapoda：Brachyura) and genetic marker from mitochondrial 16S rDNA 论文作者孙红英导师周开亚教授学科专业动物学研究领域\研究方向学位级别博士学位授予单位南京师范大学学位授予日期2002 论文页码总数80页关键词蟹中华绒螯蟹线粒体基因组遗传标记馆藏号BSLW /2003 /Q959 /30 测定了短尾类十足目动物中华绒螯蟹的线粒体基因组12940 bp的核苷酸序列。

UPGMA cluster analysis based on Nei's unbiased measures of genetic identity was assayed for five geographical groups of Elymus nutans, indicating that there was a significantly positive correlation between genetic differentiation and geographical habits among the five groups.

对各地理类群基于Nei氏无偏估计的遗传一致度的聚类分析表明，各地理类群间的遗传分化与其所处的地理生态环境具有较高的相关性。

The analysis revealed that the intervarietal genetic relationships of several varieties was related to their pedgree of the parent and most of the varieties had a narrow genetic base.

聚类分析表明，30个棉花品种可分为3组，品种间的遗传关系与品种自身的系谱有关，大多数品种的遗传基础比较狭窄。

After extensive survey of species of Takakia, we couldn't have found any individuals because of its limited population distribution, so we decided to add some relevant studies of conservation genetics to make up for the shortage of this project, including the analysis of effect of stand age and management regime on genetic diversity on Thuidium cymbifolium in Western China, and genetic structure of the endangered insular plant Neolitsea sericea on the Zhoushan archipelago. Results showed that the population of T.

藻苔类植物多分布于高山雪域地带，且范围极为有限，课题组经多次野外搜寻，未能采集到活体材料，而课题实施时间仅有1年，因此课题组同时积极开展云杉人工林林下大羽藓遗传多样性恢复的动态变化，以及岛屿地理隔离对濒危物种舟山新木姜子种群遗传结构的影响等研究，以弥补项目实施之不足。

Variabilis natural type; applied the theory of numerical taxology and cluster analysis method, classified the Q. variabilis of Qinba and Huanglong mountain; ascertained the standard and method of Q. variabilis plus trees selection about 30 ages in Shaanxi province different areas and selected 49 plus trees that were suitable to different areas; used isoenzyme analysis ,through the detection enzyme system of POD,GDH,EST and ADH ect, researched the genetic variation level of Q. variabilis natural populations and heredity construction of different Q. variabilis natural type .The result showed:(1) Q.

本文通过对栓皮栎地理分布的研究，确定了研究栓皮栎天然类型的地理区域；应用数值分类学原理，采用聚类分析方法，对秦巴山区和黄龙山区的栓皮栎天然类型进行划分；确定了陕西省不同地区30年左右栓皮栎优树选择的标准和方法，并选出了适宜不同地区生长的优树49株；采用同工酶技术，通过对POD、GDH、EST、ADH等4个酶系统的检测，研究栓皮栎天然群体遗传变异水平和不同栓皮栎天然类型的遗传结构。

Investigation of the resistance development of T. cinnabarinus to common used acaricides, analysis of the resistance inheritance, clarification of resistance mechanisms, comparison of the ecological fitness, estimation of the resistance realized heritability and assessment of the resistance risk would have theoretical and practical senses for protocol designing of resistance management and enriching the research contents of pest resistance.

研究朱砂叶螨对常用杀螨剂的抗性发展趋势，分析其抗药性遗传方式，明确其抗性发生机制，比较敏感、抗药性品系的生态适合度，估计其抗药性现实遗传力并作出抗药性风险评估，对制订螨类抗药性治理方案和充实有害生物抗药性研究内容有着重要的理论和实际意义。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了