查询词典 mutation

Wheel disk gambling selection operator, adaptive crossover and mutation operators are used as genetic operators.

其中遗传算子分别采用轮盘赌选择算子以及自适应的交叉和变异算子。

Conversely, there is also the same amount of evidence that mutations show no epistasis or antagonistic interactions (each additional mutation has a disproportionally small effect).

相反，也有相同数量的证据表明突变没有上位效应，或者是突变没有拮抗的互作（每增加一个突变，只产生小的、不成比例的影响）。

In this algorithm, inertia weight is nonlinearly adjusted by using population diversity information. Velocity mutation factor and position interchange factor are both introduced and the global performance is clearly improved. The algorithm has been applied to optimization of parameters in SVM.

该算法利用种群多样性信息对惯性权重进行非线性的调整，并在算法的后期引入速度变异算子和交换算子，使算法摆脱后期易于陷入局部最优点的束缚，同时又保持前期搜索速度快的特性。

In this algorithm, inertia weight was nonlinearly adjusted by using population diversity information. Velocity mutation factor and position interchange factor were both introduced and the global performance was clearly improved.

该算法利用种群多样性信息对惯性权重进行非线性的调整，并在算法的后期引入速度变异算子和位置交叉算子，使算法摆脱后期易于陷入局部最优点的束缚。

DMD is caused by a mutation of the gene for dystrophin, a protein in the muscles.

DMD源于肌肉中一种称为肌营养不良蛋白的基因突变。

The dose-effect is relatively ideal,and the HPRT gene mutation can be taken as a radiation biological dosimeter.

克隆法是一种检测放射性核素内、外照射诱发HPRT基因突变的方法，HPRI，基因突变剂量效应关系理想，有可能作为辐射生物剂量计。

In the present experiment, the tender stems of Dracaena cambodiana were used as explants to establish a two-step tissue culture and regeneration system. The effects of types and concentrations of plant hormones on the induction of callus were studied. Based on these, the reactions of callus regeneration to different mutation-induced approaches (60Co irradiation, EMS and colchicines), the regeneration ability of the treated callus as well as the characters diversities (including the appearance traits and cytological observations) of the regeneration plants were investigated.

本试验以龙血树幼嫩茎段为材料，通过对龙血树幼嫩茎段两步培养法再生的研究，建立了龙血树幼嫩茎段离体再生体系，证明了愈伤组织的发生和激素种类与浓度的关系；并在此基础上研究了愈伤组织再生对不同人工诱变方法（60Co辐射、EMS、秋水仙素）的反应、被处理愈伤组织再生能力和再生植株性状多样性、以及再生植株不同生理角度的变异性，得到了2株变异株系。

We can make use of chip to analysis virus gene group; construct mutation detection technique of heredity diseases and become normal detection technique of many heredity diseases; supervise the changes of cell gene expression, research pathogenic theory of virus; differentiate bacteria gene types and identify bacteria strains, provide base data for screening and supervise drug-fast gene.

利用基因芯片可加速对病毒基因组的功能分析；可建立遗传病的突变检测技术，并成为对多种遗传病的常规诊断技术；可用来监测宿主细胞基因表达的改变，研究病毒的致病机理；基因芯片还可用来对细菌基因的分型和菌种鉴定，为筛选和监测细菌的抗药性基因提供基础数据。

We can make use of chip to analysis virus gene group; construct mutation detection technique of heredity diseases and become normal detection technique of many heredity diseases; supervise the changes of cell gene expression,research pathogenic theory of virus; differentiate bacteria gene types and identify bacteria strains,provide base data for screening and supervise drug-fast gene.

目前我国在出入境检验检疫中，已开始在基因芯片技术检测传染病病原方面开展了研究工作，国家质检总局动植物检疫所研制出了检测SARS病毒的全基因芯片，极大的促进了出入境检验检疫检测技术的发展，但目前国内外尚未见到有关新城疫病毒基因芯片的报道。

The mutation means that Duffy receptor proteins are not made in red cells.

变异意味着趋化因子的蛋白质不再由红血球制造产生。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。