查询词典 genetic code

The influence of some rnodified genetic algorithms on searchspeed is also examined. Some genetic operations suitable to the optimization technique areobtained, therefore, a novel way of solving a class of optimizations of functions that cannot be realized using the method of steepest descent is proposed.

文中还分析了一些改进的遗传算法对于该问题搜索速度的影响，得到了适于解决此问题的合理的遗传操作，从而为有效地解决最速下降法所不能实现的某一类函数代化问题提供了一种新的途径。

In the development of leukemia, methylation plays an important role in the genetic expression regulation and genetic structure stabilization.

在白血病的发展中，甲基化对基因表达的调控和基因结构的稳定起着重要的作用。

Molecular systematics on germplasm resources of oak silkworm, Antheraea pernyi , including genetic diversity, cultivar taxonomy and microevolution within species, were investigated using Random Ampified Polymorphic DNA, mtDNA sequence analysis and population genetic analysis.

1.1.1 柞蚕的地理分布 20-211.1.2 柞蚕种质资源的收集、改良、保存和利用 21-231.1.3 柞蚕的滞育和化性 231.1.4 柞蚕的体色 23-241.1.5 柞蚕品种资源的系统分类 24-251.1.6 柞蚕杂种优势的利用研究 251.1.7 柞蚕的起源与传播 25-28

Molecular systematics on germplasm resources of oak silkworm, Antheraea pernyi, including genetic diversity, cultivar taxonomy and microevolution within species, were investigated using Random Amplified Polymorphic DNA , mtDNA sequence analysis and population genetic analysis.

中文题名柞蚕种质资源的分子系统学研究副题名外文题名 Molecular systematics on germplasm resources of Antheraea pernyi 论文作者刘彦群导师鲁成向仲怀学科专业特种经济动物饲养学研究领域\研究方向蚕的生物技术与遗传育种学位级别博士学位授予单位西南农业大学学位授予日期2003 论文页码总数143页关键词蚕种质资源柞蚕馆藏号BSLW /2003 /S885 /1 柞蚕业是我国的一项传统产业，在现代国民经济中仍然具有资源配置、经济和生态的合理性，有着广阔的发展前景。

In this paper, a real-valued-coding niche genetic algorithm modifying the binary-coding niche genetic algorithm (Goldberg and Richardson, 1987) is developed for searching global minimum value of a multiple-peak function efficiently.

本文修改Goldberg 与 Richardson(1987)提出之二位元编码利基遗传演算法，发展一实数编码利基遗传演算法以搜寻多峰多谷函数之全域最小值。

In this paper, population genetic variability and genetic structure of five populations of an important cultivation species, mirror carp ( Cyprinus carpio L.) were analyzed using 30 microsatellite loci. The observed and expected heterozygosity values, polymorphic information content and number of effective alleles ( A e were all determined.

采用30个微卫星分子标记，对5个镜鲤群体的观测杂合度、期望杂合度、多态信息含量和有效等位基因数等进行了遗传检测，根据基因频率计算遗传相似系数和Nei氏标准遗传距离，以 c 2检验估计Hardy-Weinberg平衡，以近交系数和基因流分析群体的遗传分化。

The corresponding genetic distance is 0.3068, 0.2041(GMC and F1) and 0.1961(JCC and F1) respectively. The genetic distance between German mirror carp and Japanese crucian carp is the largest.

三个群体间的遗传距离分别为0.3068、0.2041（德国镜鲤和F1）、0.1961（日本白鲫和F1）。

The results revealed that nine of the fourteen Y-specific markers cannot be used for investigating the swamp buffalo Y chromosome genetic diversity because of the reasons specified below: three microsatellites markers (INRA008, UMN0103 and UMN0504) were single allele and monomorphism, three (UMN1113, UMN0304 and BC1.2) indicated three alleles respectively but mornomorphism, and the other three (UMN0920, UMN0307 and UMN3008) showed irregular ladder-like bands. Only the remaining five microsatellites (INRA124, INRA189, BM861, PBR1F1 and UMN2001) indicated polymorphisms, and thus can be applied to study the swamp buffalo Y chromosome genetic diversity.

结果表明，3个标记（INRA008，UMN0103和UMN0504）只有1个等位基因，表现为单态；3个标记（UMN1113，UMN0304和BC1.2）均为3个等位基因，但呈单态；3个标记（UMN0920，UMN0307和UMN3008）呈现无规律的梯状条带，所以这9个标记都不适用于水牛的Y染色体遗传多样性研究；只有5个标记（INRA124，INRA189，BM861，PBR1F1和UMN2001）具有多态性，表明适用于水牛的Y染色体遗传多样性研究。

Osteoporosis as a complex multifactorial disease is determined by genetic and environmental factors as well as their interactions,with high degree of genetic determination.

骨质疏松是一个复杂的多因子疾病，由遗传和环境因素相互作用，具有高度的遗传决定性。

Based on NewGA, the thesis proposes a multigroup parallel genetic algorithm with simulated annealing method , then combines MPGASA with BPNN. According to whether simulated anealing method is used or not, two parallel genetic neural networks are implemented respectively. Results show that PGANN_SA is superior to PGANN and NewGANN.

在NewGA的基础上首次提出一种基于模拟退火机制的多种群并行遗传算法MPGASA，将MPGASA与神经网络相结合，按照是否采用模拟退火机制接受新个体分别实现了两种并行遗传神经网络PGANN_SA和PGANN，计算结果表明采用模拟退火机制有利于改善遗传神经网络的性能。

Chimborazo and Cotopaxi, took me by the hand.

越过琴博腊索山和科托帕克西山。

This car is in a good condition.

这辆车的状况很好。