population size

Natality and yearly increase rate of the deer population decreased year by year as the population size increased.

种群出生率和年度增长率随种群数量增加而逐年降低，而种群死亡率却有增加趋势。

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The results showed that, significant positive correlations existed between the total population size ( POS), distribution of the breed ( DIS) and extinction probability ( P0.01).

结果表明：品种的总群体数量、品种的分布区域与灭绝概率呈极显着正相关（p0.01）；

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Estimates of population size in pure-line breeding of soybean

大豆纯系育种中群体规模的估计

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The rapid economic and social development, demographic situation is changing, especially in urban population size changes more apparent.

在经济与社会飞速发展的同时，人口状况也发生着变化，尤其是城市人口规模的变化更为明显。

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The population size and age structure in the next year could be accurately forecasted by the number of fresh roots with budlet and present population in late autumn.

用秋末新生根蘖数量和现时种群数量可以较准确预报翌年种群数量和年龄结构。

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In this paper, the new methods of optimizing genetic algorithm control parameters are presented, including the method of adjusting crossover probability and mutation probability, the dynamic convergence rule and the method of determining the optimal population size.

提出了新的遗传算法控制参数优化策略，包括变异率、交叉率调整策略，动态收敛准则以及二进制编码下最优种群规模的确定方法。

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Compared with the simple genetic algorithm, ECGA runs much faster and can get more accurate results but needs a much smaller population size and fewer function evaluations.

与传统的遗传算法相比，ECGA搜索寻优速度更快，获得的结果更准确，也可以使用更小的种群，函数求值次数也更少。

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For severe carbon emission area, we can reduce carbon emissions size by adjusting energy consumption structure, raising the economic development lever and reduce the population size.

对于重度排放区域，可以通过调整能源消费结构、提高经济发展水平以及缩小人口规模等措施来降低碳排放强度。

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Population size dynamics and population statistics features of plateau pikas ( Ochotona curzoniae) are researched in this paper, v/ hich supplies population ecology research of plateau pikas with important parameters.

本论文研究了高原鼠兔（Ochotona curzoniae）种群数量动态和种群统计特征，为高原鼠兔种群生态学研究提供了重要参数。

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Since the human activities, many living and breeding area were damaged and led to patch or fragile environment and the decreasing of the population size.

人类活动使种群的栖息地斑块化，进而使其成为脆弱生境，导致种群数量减少。

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Based on the theory of the relationship between investment and consumption in general demand, this article discusses what relationship between population size and economic growth, and how population growth of moderate degree has brought energy and opportunity to economic growth in India.

本文从总需求中的投资和消费角度出发，就印度人口规模与经济增长之间的关系问题，考察人口对印度经济增长带来的活力和机会。

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Simulations showed that the average number of alleles would increase by only 0.4 within 100 generations with a doubling of population size.

结果表明假设种群数量比现在扩大一倍，经历100个世代后也只会使平均等位基因数少减少0.4。

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First, this paper constructs a SIQS epidemic model that incorporates constant recruitment and a general population size dependent contact rate. A threshold parameter cis identified.

首先建立了一类具常恢复率，有效接触率依赖于总人数的SIQS传染病模型，并得到了阈值参数σ的表达式。

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It treat fish population or resource stock as a study unit, analyze the relationship between sustainable yield, optimum fishing effort and population size.

它是把种群或资源群体作为一个研究分析的单位，研究一个资源群体的持续产量、最佳捕捞努力量和资源群体大小之间的平衡关系。

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An initial study on the population size and distribution of bottlenose dolphin in the East China Sea

东海水域瓶鼻海豚种群数量和分布的初步研究

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The seasonal ecological features of phytoplankton community including its species composition, population size, dominant species, saprobic indicator, diversity index and diatom biotic index were preliminarily studied at 22 sampling stations in the Chaohu Lake, Anhui Province.

对巢湖浮游植物在22个样点，四季采样，进行了种类组成、种群数量、优势种、污染指示种，多样性指数及硅藻指数等群落生态学的初步研究。

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But only enlarge population size, it will decrease breeding efficiency and population multiple breeding gain, we should enlarge breeding flock size and active breeding flock proportion in practice. 5.

育种投入平均减少22.97%，但单一加大群体规模，随着留种公羊数的增加，将降低育种效益和综合遗传进展，在育种实践中应尽量扩大育种群规模和主动育种群比例。

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When proportion of breeding flock size is fixed, the population size enlarge every 5000, breeding profit and genetic gain will roughly increase 7.21% and 6.60% respectively, and breeding cost will decrease 22.97%.

在育种群规模比例固定的情况下，群体规模每扩大5000只，育种效益平均增加7.21%，遗传进展平均增加6.60%。

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Finally, the effect of house market-positioning is expatiated respectively by population size and income, demographic composition, population migration and family size.

最后，针对人口规模与收入、人口构成、人口迁移及家庭规模和类型对我国住宅市场定位的影响分别展开阐述，并分别提出应对措施。

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Parallel Genetic Algorithm Based on Population Size Mutable Coarse-grained

基于种群规模可变的粗粒度并行遗传算法

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This paper represents a new method to reconstruct the urban population size by generating from its definition& the scale and the population statistics.

本文以莆田市为例，从城镇人口的定义着手，认为统计城镇人口规模的关键是如何判定城市化地域范围，选择何种人口口径。

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The National Development and Reform Commission says the census is critical to understanding the population size, structure and distribution.

国家发展和改革委员会表示，人口普查对了解人口规模、结构和分布情况至关重要。

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Optimal Population Size for Genetic Algorithm Based on Repeated Natural Number Coding

可重复自然数编码遗传算法的最优群体规模

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Based on this framework, the government intervention policies of population reproduction is assessed in terms of their effectiveness in reducing fertility rate, controlling total population size, increasing population quality and standard of living, lessening population pressure, and promoting economic growth.

实行人口再生产干预的非均衡政策，确保在低生育率水平下对人口进行总量控制，全面提高中国的人口素质和生活质量，降低人口压力综合指数，促进人均经济增长。

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Equally fallacious, for the same reason, is the argument that population size is limited via reduced birth rates "for the good of the species".

同一原理，为了物种自身益处而限制物种的群体数量这也是靠不住的。

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This might be due to the continuous, oriented selection for the flowering traits and might also be due to the genetic drift induced by selection intensity and effective population size.

这可能是由于连续对开花期性状定向选择的结果，也可能还与群体有效含量和选择强度引起的遗传漂变有关。

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While the population size exceed presetting threshold, the population size decrease to original state. Then, to solve discrete optimization problem, PSO algorithm is modified to discrete one.

当种群规模超过预先设置好的阈值时，将种群规模降为初始状态。（2）为求解聚类问题，将PSO算法修改为离散化PSO。

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Another possible reason of high differentiation, could be from the reduced population size that induced the genetic drift.

另外，也可能是在其进化过程中，由于居群的缩小而发生了遗传漂变。

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Large population size, a high degree of job mobility, coupled with the unequal status of its objective which determine the economic situation of migrant workers is closely linked to social attitudes and economic growth and social stability.

农民工群体庞大的人口规模、高度的就业流动性，加之其客观所处的不平等地位，决定其经济状况与社会态度与中国的经济增长和社会稳定密切相连。

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Accordingly, the sustainable agricultural development strategy countermeasure of these two regions were proposed as follows: to follow the natural law and develop eco-agriculture; to strengthen the consciousness of saving resources; to control the population size; to improve the peasant quality and advance agricultural industrialization.

最后，提出了遵循自然规律发展生态农业、增强资源节约意识、控制人口数量、提高农民科学文化素质和推进农业产业化的农业可持续发展的对策。

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