Selection pressure

The selection pressure varied with different growth phases .

在不同生长阶段，选择压力不同。

The main solution to this problem is to adjust selection pressure through fitness scale .

通过适应度尺度变换来调节选择压力是克服这一缺陷的主要方法。

The selection pressure had great effects on the genetic relationships between varieties .

定向选择可能对烤烟品种间遗传关系有较大影响；

Selection pressure is higher in the sea so surviving is more difficult .

海里的天择压力较大，因此生存较为困难。

Influence on Property of Aerobic Particle Sludge When Settling Rate as Selection Pressure

沉降速率作为选择压对好氧颗粒污泥性质影响

The end of this article , from the study of selection pressure & we propose a new algorithm .

最后通过对选择压力的研究，提出了一种自适应的改进算法。

Entropy and natural selection pressure and their applications to population genetics of forest tree

熵和自然选择压及其在林木群体遗传学中的应用

Study on the Mathematical Model of Selection Pressure in the Upflow Anaerobic Sludge Bed

升流式厌氧污泥床筛分强度数学模型研究

That situation should have set up selection pressure for the ability to survive such infections .

当然，这一环境必须建立能够抵抗这类传染病并存活下来的选择压力。

The Lanchester Mathematical Model with Battle Selection Pressure

带选择压的兰切斯特战争模型

In the posterior period , the selection pressure should be increased to improve the converge speed .

在优化末期，逐渐增加选择压力，促进优势种群的发展，加快收敛速度。

Evolutionary selection pressure has probably entrenched the behavior in social animals such as ourselves .

其原因大概是由于进化中的适者生存的压力固化了像我们这样的社会性动物的行为。

The changes of susceptibility to deltamethrin were correlated with the selection pressure .

家蝇对溴氰菊酯的敏感性变化与药剂中溴氰菊酯的选择压有关。

The Affect of Immune Selection Pressure to Mutations of Hepatitis C Virus Hypervariable Region

免疫选择压力对丙型肝炎病毒高变区基因变异的影响

This reproductive strategy is a response to the environmental selection pressure , and makes its life history more adaptive value

秦岭金丝猴的这种生殖策略是其在长期的进化中对环境选择压力的回应，以使其本身生活史具有适应性

During breeding for vertical resistance , horizontal resistance tends to decline because of negative selection pressure .

当培育垂直抗性时，由于负的选择压力，水平抗性趋于下降。

The main drivers of resistance rates are not new mutations but rather antimicrobial selection pressure and transmission .

耐药比率的主要驱动因素不是新的突变，而是抗菌素的选择压力和耐药微生物的传播。

There was no significant positive selection pressure in the genes of the 3 virulence-associated factors .

经过检测这三个毒力相关因子的基因上都不存在显著的正选择压力。

Thus , keeping appropriate selection pressure will be a key problem that improving property of the algorithm has to be concerned .

因此保持适当的选择压力是使算法具有优异性能必须要考虑的一个重要问题。

By means of experiments and analyses , relations of selection pressure and performances of EC are summed up .

通过实验和分析，总结出了选择压力与进化算法性能之间的密切关系。

The results also showed that the change of improving methods could exert selection pressure on different gene site , which can made the method more effectively .

结果还证实了不同改良方案的轮换，可扩大对被改良群体不同基因位点的选择压力而有效地改良群体。

By means of southern hybridization analysis , the efficient amplification of plasmid copy number was detected under a strong selection pressure .

Southern杂交分析表明若处于很强的选择压力下，该质粒的拷贝数会发生有效的扩增。

Chloramphenicol could be used as selection pressure for positive transformant when cat gene was used as selectable marker gene .

当以cat基因作为选择性标记基因时，氯霉素可以作为紫菜原生质体基因转化的选择压力。

And it could also improve our take on evolutionary dynamics , in systems that apparently experience selection pressure at both the individual and group levels .

此外，它还完善了我们进化动力学，以及在物竞天择压力下的个体与群体的生物系统。

Observation of Correlation between G418 Selection Pressure and Stably Transfected hGM CSF Clones Expression and Secretion Level

G418选择与稳转克隆表达分泌hGM-CSF的相关性考察

Thus they do not put too much selection pressure to P. infestans and are very likely to be more durable .

因此这类基因引起的抗性对晚疫病菌不会产生太大选择压力，抗性很有可能更为持久一些。

The form of resistant weeds is mainly because of its own biological and genetic characteristics , selection pressure of herbicide and single plant system .

杂草抗药性的形成主要由杂草本身的生物学、遗传学特性和外界因素除草剂的选择压及单一的种植制度造成；

If selection pressure becomes too big , the algorithm may not converges globally ; In turn , may lead the algorithm into local optimum .

选择压力过大，会导致算法不能收敛；过小，可能导致算法陷入局部最优。

Cones and seeds are the most important part of propagation system for conifers , and have great ecological adaptation under strong selection pressure .

球果和种子是物种繁殖系统的最重要组分，处于强大的选择压力下，有很大的生态适应性。

It is expected to have an in-depth understanding on the behavior of these molecules , especially sequence variability possibly caused by selection pressure .

通过这些分析，希望能够深刻的了解这些MHC基因在鲸类的变异水平，尤其关注那些由选择压力引起的序列变异。