查询词典 hypothetical population

The results showed that the cephalothorax of Burma population was relatively smaller, and the dactyl length and prododus length of major second pereropod were larger than those of Thailand population, which proved Burma population had stronger activity and ability to get food.

结果显示：缅甸品系具有头胸部相对较小的特征，其第二步足的指节长、掌节长和宽均大于泰国品系，体现了较高的活动性和取食能力。

The results showed that the cephalothorax of Burma population was relatively smaller , and the dactyl length and prododus length of major second pereropod were larger than those of Thailand population , which proved Burma population had stronger activity and ability to get food .

结果显示：缅甸品系具有头胸部相对较小的特征，其第二步足灌足的指节长，掌节长和宽均大于泰国品系，体现，广较高的活动性和取食能力。

1Niche construction can lead to stable coexistence of diverse genotypes in spatially structured population, which supports a stable polymorphism even without heterozygote superiority.(2)With habitat deterioration, niche construction accelerates the formation of steady polymorphism and hence impedes the harmful influences of environment on the population, which might embody a life-history strategy of organism under the unfavorable environment.(3)Niche construction results in the coexistence with alternative polymorphism through genotype-environment feedback and limited gene flow.(4)The niche-constructing organism is an active force to alter its environment and hence the direction of natural selection in order to better survival.(5)Spatial dynamics and distribution pattern of metapopulation are profoundly influenced by time-lagged niche construction.(6)Metapopulation size can reach a fixed level in the recency effect and equal weighting of time lag but is statistical stability in primacy effect, which implies the primacy effect is most remarkable.(7)The increment in the relative weightingof each generation\' niche construction and the length of time lag are significant factors for system destabilization.(8)Moderate capacity of positive niche construction benefits the metapopulation persistence.(9)The narrowing of niche breadth can decrease the metapopulation size and thereby increase the extinction risk.(10)The coupled function of time lag and niche construction make the system oscillation and generate the spiral wave, spiral-broken and circular wave in heterogeneous habitat.The spatial distributions of metapopulation and resource content are complementary due to a phase lag of their both frequencies.(12)Metapopulation persistence with niche construction depends not only on the balance between colonization and extinction, but also on the balance between the ability of niche construction and natural dissipation of habitat.(13)Metapopula-tion can survive under certain condition when the percent of suitable patches in habitat is lower than the ration of extinction to colonization.(14)Two thresholds exist in the process of transition of habitat quality dynamics from unsuitable to suitable, which include the intensity of niche construction and the initial condition of system.(15)Metapopulation size is positive correlated with the ability of positive niche construction, which means that organism or population who has strongly positive influences on their environment plays an important role to maintain the available habitat.

通过上述几个方面的研究，主要得出以下15条结论：(1)生态位构建可使空间结构种群，甚至是在没有杂合子优势的条件下，形成多种可能的稳定基因型分布模式；(2)随着环境的破坏与恶化，种群的生态位构建作用加速其较早形成稳定多态以阻碍环境对种群的不利影响，解释了有机体在不利环境下的一种生活史对策；(3)生态位构建作用通过基因型—环境反馈机制及有限的基因交流导致基因型多态的稳定共存；(4)有机体的生态位构建作用是一种积极的动力改变环境进而改变其自然选择的方向；(5)生态位构建的时滞作用对集合种群动态和空间分布产生深刻影响；(6)集合种群大小在时滞的崭新效应和等权重效应下达到一固定值，而在首位效应下达到统计稳定，表明首位效应的影响最显著；(7)首位效应下生态位构建相对权重的增量和时滞的长度是影响系统不稳定性动态的关键因素；(8)适中的生态位构建强度有利于集合种群的续存；(9)生态位宽度变窄会减少集合种群的数量从而增加其灭绝风险；(10)时滞和生态位构建的双重作用使系统产生周期振荡，并在异质性环境中产生稳定的螺旋波，破碎的螺旋波和环形波三种分布模式；(11)集合种群与资源含量的空间分布因为相滞而互补；(12)具有生态位构建的集合种群续存不仅取决于侵占率与灭绝率之间的平衡，而且依赖于生态位构建能力同其生境的自然消耗速率之间的妥协；(13)当生境中适合侵占的斑块比例小于其侵占率与灭绝率之比时，生态位构建作用促使集合种群在一定条件下续存：(14)生境斑块的状态从不适合到适合转变过程中存在生态位构建强度和系统初始条件这两个阈值；(15)集合种群的大小同正生态位构建能力正相关，意味着对环境具有较强正作用的有机体对维持有效生境起积极作用。

When the larvae were fed with Apricot and apple-pear the death rate of the larvae increased,the larval and pupa stages prolonged, the pupa weight decreased, female adult life shortened and the average fecundity.The age-specific life table of codling moth indicated that the trend index of codling moth population fed on Jonathan apple, Red Delicious apple, Zhangye number two apple, Chinese pear-leaved crab-apple and Crisp pear were more than one. Experiment population quantity was at the growth condition. The trend index of codling moth population fed on Apple-pear and Apricot were less than one.

通过不同寄主植物饲养条件下苹果蠹蛾特定年龄生命表的分析可知，取食沙果、早酥梨、红玉苹果、红元帅苹果和张掖2号苹果的苹果蠹蛾实验种群的种群趋势指数均大于1，实验种群数量处于增长状态，而当苹果蠹蛾取食苹果梨和杏时，其种群趋势指数小于1，下代种群(来源：Ab9b9BC论文网www.abclunwen.com)数量不断减少。

The CPI-W's population represents about 32 percent of the total U.S. population and is a subset, or part, of the CPI-U's population.4. Is the CPI a cost-of-living index?

这样一种经济环境令人担忧，因此，如何理解CPI指数便成为一个十分重要的问题。

The algorithm uses an efficiency and more cupidity operator to decode, it makes genetic evolution beginning from several civilization populations which has more high average fitness. It use "communism" transfer tactic which output the best individual of population to all of other population termly, to make best individual shared, and lastly make all population together evolving.

该算法采用高效的超贪心算子进行解码，使遗传进化过程从多个平均适应度较高的文明群体开始进化，并采用定期将各群体的最优个体输出给其他群体，使得最优个体共享，促进所有群体共同进化的共产主义迁移策略。

There were no significant correlations between food concentration and the rate of population increase of Clone B as well as the mixis rate and fertilization rate of Clone A, B and C. However, the relationships between food concentration and the rate of population increase of Clone A and C were significantly curvilinear, with the regression equation Y=0.019X2-0.209X+0.638 and Y=0.042X2-0.402X+0.852, respectively. The relationships between the food concentration and the instant rate of population increase, the mixis rate and the fertilization rate of clone D were all significantly curvilinear, with the following regression equations Y=-0.052X2+0.609X-0.667,Y=0.994X2-15.763X+73.424 and Y=-0.251X2+15.940X-15.446, respectively.

克隆B的种群瞬时增长率、种群中的混交雌体百分率和混交雌体受精率均与食物密度间无显著的相关性；克隆A和C的种群瞬时增长率与食物密度间呈曲线相关，而其种群中的混交雌体百分率和混交雌体受精率均与食物密度间无显著的相关性；克隆D的种群瞬时增长率、种群中的混交雌体百分率和混交雌体受精率均与食物密度间呈曲线相关。

The protection measures were proposed based on the discussion of the status and trends of the population viability. The results will enrich the studies on conservation of endangered plants, and improve the cross researches of population ecology and conservation biology, and provide the scientific guidance for conservation of Cycas fairylakea population.

研究结果不仅丰富和发展了珍稀濒危植物保护研究的理论和方法；而且有利于种群生态学和保护生物学交叉领域研究的进一步深入；同时为仙湖苏铁种群保护对策的制定以及保护行动的开展提供了科学依据和方法指导。

Now the facing new problems are a relative worsen of the living conditions among the poverty population, enlarging difficultness for the poverty population to add income, increasing the cost of the anti-poverty, disjointedness between the government anti-poverty policy and its goal, investment absence and illogic structure in the anti-poverty capital, lack of inspirit mechanism of the poverty population in the poverty areas, the conflict among the anti-poverty.

目前面临的新问题是：贫困人口的生活状况相对恶化，贫困人口增收的难度加大，贫困人口的脱贫成本逐年增加，政府的扶贫政策与扶贫目标相左甚至背离，扶贫资金的投入力度不够，且结构不合理，对贫困地区和贫困人口缺乏激励机制，扶贫工作的许多矛盾相互交织。

The study of regional population evolution is helpful to reveal the rule of population distribution and is important for reasonably making population developmental policy, and for the promotion of regional sustainable development.

研究区域人口空间演变，可揭示区域人口空间分布的规律性，对于制定合理的人口发展政策，促进区域的可持续发展，均具有重要意义。

The upshot is that 125 years after Koch worked out what caused TB, it is still a serious threat.

Koch发现了肺结核病的起因到现在已经有125年了，但这种疾病至今仍严重地威胁着人类的健康。

Without it, there are only alibis.

没有热情就只剩下借口。