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Traditional GEP Algorithm may leads to prematurity by local optimum trap . In order to solve the premature convergence problem, this paper proposes a novel GEP method based on backtracking referring to the atavism in the biosphere.

传统GEP可能陷入局部最优的"早熟"陷阱,为解决基因表达式编程中的未成熟收敛问题,本文借鉴生物界的"返祖现象",提出了基于回溯的基因表达式编程方法,有效地改善了传统算法在进化过程中的早熟现象。

The rest clones were quite different and were most related with uncultured sequences, forming special division in the tree.

其余的克隆为未培养序列,与前者差异很大,在进化树上形成了独立的分支。

Through studying and classifying labeled and unlabeled data, this paper proposed a modified differential evolution algorithm for semi-supervised fuzzy clustering.

通过对已标示和未标示数据的学习和分类,提出一种改进微分进化算法的半监督模糊聚类。

If karma goes unreleased, the soul may have skipped certain lessons necessary to evolve or understand love.

如果业力未释放,灵魂将在进化或理解爱的过程中跳过某些必要课程。

PCC, and Ceratopteris richardii. Besides these findings, both the mechanistic and mechanistic-empirical combination models were used to analyze the adaptive evolution of amino acid sites in the CVNH domain. Our results showed that:(1) neither model reveals significant sites undergoing positive selection;(2) purifying selection has played a dominant role during CVNH evolution; and (3) the MEC model better fits the CVNH data set.

在此基础上,分别采用机理式模型和MEC模型(Mechanistic-empirical combination model)对CVNH结构域序列位点进行适应性进化分析,结果显示:1两类模型均未检测到统计上显著的正选择位点;2净化选择对CVNH起主导作用;3MEC模型更适合所研究的数据。

Four primers screened from 17 primers were used to analyze genetic diversity between one population in the mine deposits and one in noncontaminated soil, the results showed that a higher level of DNA diversity was detected in the plants grown in the mine deposit. The results above indicated that Commelina communis grown in copper mine deposits had evolved adaptation under heavy metal stress, and such adaptation had a geneic basis.

从17条引物中筛选出4条对其中1个铜矿山种群和1个正常土壤种群进行种群内的遗传多样性研究,结果显示污染种群内基因遗传多样性水平高于未污染种群,上述结果说明了在铜胁迫下矿山鸭跖草种群已经进化了对铜污染的适应性,并且较高水平的遗传多样性可能是植物适应重金属污染胁迫环境的基础。

The chromosome number is 2n=96, belonging to hexaploid species (2n=6x=96), and the morphological difference is not obvious among the 96 chromosomes. All the chromosomes are metacentric and submetacentric. Relative length ratio of the longest to the shortest chromosomes is 2.10. There is no satellite chromosome in all the 96 chromosomes. The karyotype formula is 2n=96=60m+36sm, the karyotype type is 2B, a higher karyotype evolution.

结果表明,该入侵种的染色体数为2 n=96,属六倍体物种,各染色体间形态差异不明显,均为中着丝粒或近中着丝粒染色体,最长与最短染色体相对长度比为2.10,全套染色体未见随体,核型公式为2 n=96=60 m+36 sm,核型类型为进化程度较高的2B型。

There was no identical proteins in the database we searched, but it shared high sequence homology with PNZIP from Pharbitis nil and two other open reading frames of unknown function from Synechocystis spp and Porphyra purpurea. These together defined a new family of evolutionarily conserved leucine zipper proteins, which might play a role as a transcription factor in the regulation of gene expression.

GenBank数据库搜寻结果显示,AT103未与任何已知功能基因有同源性,但与裂叶牵牛PNZIP、集胞藻的一个ORF、紫菜的一个ORF,构成了一个在进化上非常保守的含有亮氨酸拉链结构域的新家族,极有可能是一新的核基因转录因子。

Keywords: symbiontic evolution, immune modulation, antibody chrome, neural evolution

通过对神经元群体而不是神经网络群体进行进化设计,显著地减轻了计算量,同时利用生物免疫原理中的浓度机制和个体多样性保持策略进行免疫调节,有效地克服了未成熟收敛现象,提高了群体的多样性,从而加快优化设计速度。

Subclass while there was no correlation between DNA content and evolutionary degree at lower taxonomical classification, i.e. order, family and species.

方差分析结果显示,在较低的分类等级,即目、科以及种,核DNA含量与进化地位未发现显著的相关性。

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But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊!不用提了。提到肉,真是糟透了。

Tristan, I have nowhere to send this letter and no reason to believe you wish to receive it.

Tristan ,我不知道把这信寄到哪里,也不知道你是否想收到它。