查询词典 population explosion

Population genetics researching hereditary constitution of organism population and its changing law is a branch of genetics.

群体遗传学是研究生物群体的遗传结构及其变化规律的遗传学分支。

As far as the quality of the population is concerned, they normally take the mean of population only.

不过有关母体优劣的界定，仍多著重於以母体平均数作为考量的标的。

A simple example is calculating the mean of two population counts made 10 years apart to estimate the population in the fifth year.

一个简单的例子是计算相隔十年的两次人口普查之间的平均值，从而估计第五年的人口。

A simple example is calculating the mean of two population count s made 10 years apart to estimate the population in the fifth year.

一个简单的例子是计算相隔十年的两次人口普查之间的平均值，从而估计第五年的人口。

Population growth need not mean limited resources any more -- rather that very growth of population now means an improvement of resources.

人口增长不必再意味着资源的限制——相反，如今人口的增长意味着资源的增值。

It does not mean the population of the poor; it means a supplementary part, an empty part that separates the political community from the count of the parts of the population.

这意思是说，我们这时代的新冒出来的政治主体，会冲击已存在的政治主体群，而这是"民主"的实质过程。

Based on the study on how to set the initial population and operational parameter s of operators, a conclusion can be drawn that distribution of the initial population and the selection of operational parameter s of operators directly concerns global convergence and searching efficiency of genetic algorithm.

通过对遗传算法初始种群与操作参数设定问题的研究，认为初始种群的分布状态与算子操作参数的选取直接关系遗传算法的全局收敛性与搜索效率，对初始种群与各操作参数进行合理设定是应用遗传算法进行寻优计算的重要问题。

Spodoptera litura ; Natural population ; Life parameter ; Index of population control

斜纹夜蛾；自然种群；生命参数；控制指数

According to the quality of HT statistics, we know that the sampling structure after adjusting is relatively closed to that of population. The accuracy of the population parameter inferred through this statistic will be higher than that have not considered the influence from background.

在确定出对核心问题回答有影响的背景因素之后，我们应用Horvitz Thompson统计量对抽样调查的数据作适当调整，由Horvitz Thompson统计量的性质，我们知道经过处理后的样本结构比较接近总体结构，由该统计量推断出的总体参数的精度比不考虑背景因素影响条件下的精度更优。

A point estimate may be the researcher's best guess at the population value, but, by its nature, it provides no information about how close the estimate is "likely" to be to the population parameter.

点估计本身并不能告诉研究者该估计值和总体参数的距离到底有多近。

Aquatic or marsh-growing fern allies; known to have existed since the Cenozoic; sometimes included in Lycopodiales.

生活于水中或湿地的蕨类；从新生代生存至今；有时归于石松目之中。

The engine was uprated from a 90hp Franklin to a 125hp Lycoming.

改良过的引擎是从90hp到125hp莱康明富兰克林。