查询词典 decrease in population

In this present study, we constructed a F_2 segregating population containing 1599 individuals using upland cotton genetic standard line TM-1 and sea island glandless mutant line Hai-1 as parents. Thereafter, Gl_2~e gene was finely mapped via this population.

本研究利用陆地棉遗传标准系TM-1和海岛棉无腺体突变品系海1构建的1599个F_2单株，对无腺体突变基因Gl_2~e进行了精细定位。

Consider two species from the genera Brassica and the genera Gossypium, respectively. We use a simulation method to study the stochastic model for modelling the competition between hybrid population and wild relative population in a natural environment.

考虑两个分别来自芸薹属和棉属的物种，用电脑模拟的方法去探讨随机式模型，即在自然环境之下杂交种与野生亲缘种之间的竞争。

The haplotype diversity index of Yangtze River population and Pearl River population was 0.5263 and 0.6104, respectively.

长江群体和珠江群体的单倍型多样性指数分别为0.5263和0.6104，核苷酸多样性指数分别为0.144%和0.192%。

Vallisneria spinulosa maintained high levels of genetic variation both at the species and at the population level. Partitioning of genetic diversity revealed a surprisingly low population differentiation as compared to other hydrophilous angiosperms.

利用等位酶和开发的微卫星标记研究了刺苦草在长江中下流域的遗传多样性和遗传结构，研究结果表明，刺苦草在居群水平和种水平都具有高的遗传多样性；居群间遗传分化程度非常小；居群间历史上存在长距离基因流。

Results:(1) The mean BMI of patients except for women aged from 20 to 29 years, was much higher than that of the general population (P.01).(2) The overweight (BMI≥24) ratio of the patients was much higher than that of the general population (P.01).(3) Patients with hypernormal BMI were more than those with normal BMI (BMI4) except for patients aged from 20 to 29 years.(4) Patients with hypernormal BMI were significantly more than those with normal body weight in all other occupations except for young students.

结果：①除了女性20岁～29岁年龄段外，其余各组患者体重指数的均数均明显大于中国普通人群体重指数的均数（P均＜0.01）；②本组患者中男、女性体重指数超常者(BMI≥24)所占的比重，均明显大于中国普通人群中体重指数超常者所占的比重（P均＜0.01）；③除了男、女20岁～29岁年龄段以外，其余各年龄段的患者中体重指数超常者所占的比重，明显大于体重指数正常者(BMI4)所占的比重；④除青年学生外，其他职业中体重指数超常者所占的比重，明显超过体重指数正常者所占的比重。

This paper analyzes following issues by using Geographic Information System,(1)the characteristics of immigratory population and migratory population in cities,(2)inflow spatial features for migrant workers in Beijing and Guangdong respectively,(3)situation prediction for migrant workers reflunce to Beijing, and (4)spatiallg distributing features for SARS along traffic lines.

利用地理信息系统技术对中国内地人口流动空间规律进行了初步研究，主要包括：(1)内地城市人口迁移规律，(2 )流入北京、广东两地民工流动状况的空间分析，(3)在北京SARS发生期间民工回流的态势等；SARS沿交通线分布特点。

With this inerratic change for the power of QTL detection,suitable experimental sample size could be roughly determined in practice pursuant to the degree of selection in the population of interest prior to experiment in order that the statistical power for QTh mapping would not decline because of the presence of selection in the population.

这种偏差根本上是由QTL基因型与多基因之间负的连锁不平衡以及QTL与标记之间的连锁不平衡所造成的。 2）目前QTL定位实践已找到了一些具有育种意义的主效位点。

Amon g them , four polymorphic loci with inevident genetic variation made little cont ribution to genetic variation of this population and other ten polymorphic loci with evident genetic variation made great contribution to genetic variation of this population .

其中有14个酶基因座属多态，只有一个单态基因座（ME－3）。14个多态基因座中，4个基因座遗传变异小，对该天然群体的遗传变异贡献不大，其余10个基因座遗传变异丰富，对该天然群体的遗传变异贡献大。

The main reasons caused theses problems are as follows: beyond marine carrying capacity and environment capability by predatory and extensive manners, over-exploitation of bioresources resulted in the disturbance of marine ecosystem and the obstruction of matter and energy circulation. Marine environment pollution and unreasonable oceanographic engineering caused serious damage of marine entironments, weakness of marine eco-functions, and degradation of marine ecosystems. The population explosion as well as the trend of population towards coast inflicted tremendous pressure on marine resources and environment. The weakness of marine laws system and the infirmness of macroscopical control by government policies relulted in unreasonable utilization, inefficient management, and insufficient protection of marine bioresources.

其主要原因是：对海洋生物资源的掠夺性、粗放性开发，造成资源过度利用，超出海洋承载力及其环境容量，物质能量循环出现障碍，海洋生态系统失衡；海洋环境污染和不合理的海洋开发工程，造成生境破坏，生态功能减弱，生态系统退化；人口增长和趋海发展，给沿海资源环境造成巨大压力；涉海法律法规体系薄弱，国家宏观政策调控不力，未能合理利用和有效管理、保护海洋生物资源和海洋环境。

Hypercube has many advantages, such as smaller diameter, simple routing algorithm, many parallel paths between any two nodes, and fault-tolerance, on the other hand that the Hypercube nodal degree increased logarithmetically to the number of nodes has limited network population. So we propose a constant nodal degree hierarchical topology to remedy the weakness of Hypercube and take advantages of Hypercube most. Given the definition of FCCN we analyse the basic properties including nodal degree , number of links , extensibility and diameter (maximum network communication delay). Also we proposed a simple and self-routing algorithm applied in FCCN. Although the self-routing algorithm is not optimal, but at more than 82% case it can get the shortest path, and the percent is larger and larger increased with network levels. By the self-routing algorithm the internodal distance is calculated to evaluate the network communication delay more clearly. The average internal distance is in order of the cubic root of the network population that is almost same as logarithmetically relation in a few thousands. FCCN is a highly scalable network due to its recursive construction.

首先在比较了基本互连网络的基础上，看到超立体网络的杰出性能，包括网络直径小、寻路算法简单且为自寻路算法、容错能力好等等，但是由于其节点度随网络的规模的增加而按对数关系增长，使得超立体网络的应用规模受到极大限制，所以为了能最大限度利用超立体网络的优点的同时弥补其节点度方面的不足，作者提出了节点度等于常数4的FCCN网络结构，来最多地利用立方体网络的优点；然后在对FCCN网络进行严格的定义后，分析了网络的节点度、链路数、延伸特性、网络的直径（决定网络的最大通讯延迟）等，并提出了适于FCCN网络的简单的自寻路算法，计算自寻路算法可得到最短路径的比例，看到在多于82％以上的情况自寻路算法都是最优的，而且比例随网络层数的增加而增加；应用所提出的自寻路算法计算了可以更加准确反映网络通讯延迟的参数—网络平均节点距离，计算得到此参数与网络大小的立方根成正比，此比例关系在网络的规模在几千节点以内与对数关系的网络几乎一样；FCCN网络是一高度可扩展结构，这是因为FCCN的递归构成方式，使得网络在增加节点时其原有的拓扑结构可以保持不变，不需对网络进行重新设计，为网络的实用扩展提供了条件；理论分析得出FCCN网络是一种高度可扩展高性能网络的结论。

Chimborazo and Cotopaxi, took me by the hand.

越过琴博腊索山和科托帕克西山。

This car is in a good condition.

这辆车的状况很好。