查询词典 population

Generally, the background of individuality in the population is abundant. If the sampling ratio is small, the structure of sample may be different from that of population and the sample may lack representativeness.

由于一般情况下，总体中个体的背景因素差异非常大，若抽样比例较小，则会导致样本的结构与总体的结构不一致，样本缺乏代表性。

A Multi-Objective Vaccine Co-evolution Clonal Selection Algorithm has been proposed to solve the sequencing problem of MMAL. Vaccine population and antibody population have come up.

针对混流装配线多目标调度优化问题，提出了一种疫苗协同进化的多目标免疫克隆选择优化算法。

Facing with the basic reality that the Muslim population takes up about one sixth of the world population, we should pay enough attention to the realistic influence of Shari'a a.

面对占世界人口六分之一的穆斯林社会这样一个庞大群体存在的基本事实，我们应该对伊斯兰教法的现实影响予以足够的重视。

India's population is composed of dozens of ethnic groups, there is Hindustan, terrou solid, Bangladesh, family, etc..80% of the population to Hinduism, and others to Islam, Christianity, Sikhism and Buddhism .

印度人口由几十个民族组成，有印度斯坦、泰鲁固、孟加拉族等。80％以上的人口信印度教，还有人信伊斯兰教、基督教、锡克教和佛教等。

Simple random sampling is the case where n objects are selected at random from a population, and each member of the population is equally likely to be included in the sample.

简单随机抽样是指从总体中随机取样n次，使得总体中的每个元素在样本中的出现的可能性相同。

The research attempted to understand that recruitment rhythm, microhabitat selection of megalopae of soldier crab, Mictyris brevidactylus and that distribution and population dynamic of their young population.

本研究以台中高美湿地短指和尚蟹的大眼幼虫进行著床时机、栖地选择与幼生族群分布与族群动态研究。

They lived underground 25 ± 7 mm in the sand tower. Young population of the soldier crab preferred to live with and a little higher than their adults. During the recruitment period, the maximum density of recruits could reach up to 2783.3 / m2, but young population density decline over time.

大部分幼生族群的分布位於其成蟹栖地及紧邻更高潮位的优势蟹种与短指和尚蟹成蟹栖地只交界处，著床期间幼生族群的最高密度可达2783.3只/m2，然而随著时间的延续，幼生族群数量下降

It is proved that if the optimal solution tree has an inter-node, the necessary and sufficient condition that tree structure GAs are solution foundable is that the initial population contains an inter-node; the upper limit of solution foundable probability is also calculated and the population size is proved to increase at most in a polynomial of increasing problem complexity and the probability upper limit.

本文接着给出了当初始群体随机产生，只有杂交算符作用或只有复制与杂交算符作用的遗传算法有解的充要条件，并加以证明；而且求出了这时有解的概率上限，并证明群体大小的增加不超过问题复杂性和有解概率上限的某个多项式。

The population of Russula vinosa had a high genetic diversity and each sporocarp in the population represented a single genet.

种群遗传结构的研究包括种群中个体的空间分布和亲缘关系等方面，有助于加深我们对种群的生殖和传播方式，菌根真菌与风、雨、动物等生态因子的关系等方面的理解。

Taking self-fruitful rate as the criterion and segregating population of field survey as method, we got the result that the ratio of fertile plants and sterile plants in the three F2 population of K-cytoplasmic male sterile hybrid accords with 63:1 tested by Chi-square, therefore we can infer that the restorative mechanism of K-cytoplasmic male sterile line was controlled by three different major genes, which manifested as sporophore sterility.

结果表明：在三个K型胞质雄性不育的F2群体中，可育单株与不育单株的比例经卡方检验符合63：1的理论比例，因此可以推断小麦K型胞质雄性不育的恢复由3对主效恢复基因控制，并表现为孢子体不育类型。

A historical region of southwest France between the Pyrenees and the Garonne River. The duchy of Aquitaine was joined with France after the marriage of Eleanor of Aquitaine to King Louis VII in1137, but its possession was disputed after her subsequent marriage to Henry II of England.

阿基坦法国西南部一个历史地区，位于比利牛斯山和加隆河之间，在1137年阿基坦的埃莉诺与国王路易斯七世结婚之后阿基坦公国加入法国，但当她再嫁英国亨利二世后，其归属权便受到争议

There are moments when I look at the smiling , happy faces of my expectant staff and wonder how they will cope when confronted by an outraged housemaster along with an unrepentant and recalcitrant bleached blond teenager in 18 years ' time .

有时候，我看着那些满怀期待的员工微笑，幸福的脸，想着当他们遇到一位愤怒的宿舍管理员和一位不知悔改，叛逆，而且将头发染成白色的18岁少年时，他们会如何处理。