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种群个体
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  population individual
     Both crossover operator and selection schemes are improved so that every population individual inherits more of own genetic material to increase the diversity of population individual and to obtain overall optimized results for selection.
     主要是对交叉算子和选择机制作了改进,群体中个体能较好地保留自己的遗传特性,增强了种群个体的分散性,使得优化结果更加全面,具有一定的可选择性。
短句来源
     In this algorithm,the population individual is expressed through the hierarchical real-number gone coding,thus the quality and efficiency for solving the model of complicated structure can be increased effectively. As an example,2-dimensions manipulator is designed to show its superiority.
     此算法通过多层次实数基因编码来表示种群个体,有效地提高复杂结构模型求解的质量和效率,并以此算法设计的二维机械手为例,说明其优越性.
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  “种群个体”译为未确定词的双语例句
     The DBHs of the individuals ranged mostly from 5~20 m or from 15~30 m.
     海桑种群个体胸径集中分布在5~20cm或15~30cm;
短句来源
     The DBH s of the individuals ranged mostly from 5~20 m or from 15~30 m.
     海桑种群个体胸径集中分布在5~20cm或15~30cm;
短句来源
     The average genetic distance, 0. 3056 (0.0951—0.4963) , among individuals in Mudong population was the highest and that of population Wanzhou, 0. 1401 (0.0614—0.2225), was the lowest.
     木洞种群个体间的遗传距离最大,为0.3056(0.0951-0.4963); 万州人工繁殖群体个体间的遗传距离最小,为0.1401(0.0614-0.2225)。
短句来源
     The results indicated that the value of correlation dimension of pattern of natural P. taiwanensis populations ranged from 1.077 to 1.563 and the order was Q2>Q8>Q5>Q3>Q1>Q7>Q6>Q4. On the whole, degree of individual spatial correlation of natural P. taiwanensis population in almost pure forest in Pingnan and in mixed forest in Shouning had no significant disparity.
     结果表明,天然黄山松种群格局关联维数值在1.077~1.563之间,不同群落间的大小次序为Q2>Q8>Q5>Q3>Q1>Q7>Q6>Q4,屏南天然黄山松近纯林与寿宁混交林种群个体的空间相关程度差异不大。
短句来源
     The results showed that the heights of individuals of the population ranged mostly from 6~14 m.
     结果表明,海桑种群个体高度集中分布在6~14m;
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  相似匹配句对
     On the individual growth disciplinarian of Pinus densiflora Sieb. et Zucc. population in Shandong Province
     山东赤松种群个体生长规律
短句来源
     Effects of Residual Toxicants on Populations and Recovery of Individual
     残毒对生物种群的影响及个体的恢复
短句来源
     individual spirit;
     个体精神;
短句来源
     were the dominant species.
     为优势种群
短句来源
     were smaller populations.
     的种群则较小.
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  population individual
Finally, within-population individual differences were observed because of local plant heterogeneity in PAs.
      


This paper is the second of a series of studies on the intraspecific variation offecundity of the Large Yellow Croaker, and is concerned with the peculiarities ofthe individual fecundity of the spawning population of Kuanching-yang, Fukian. The material for the present study was collected during the period from March-June, 1959 in the spawning ground. Based upon 173 samples studied, the results aresummarized as follows: 1. The individual absolute fecundity (r) varied between 39.9 and 900.6(×1000) (average, 256....

This paper is the second of a series of studies on the intraspecific variation offecundity of the Large Yellow Croaker, and is concerned with the peculiarities ofthe individual fecundity of the spawning population of Kuanching-yang, Fukian. The material for the present study was collected during the period from March-June, 1959 in the spawning ground. Based upon 173 samples studied, the results aresummarized as follows: 1. The individual absolute fecundity (r) varied between 39.9 and 900.6(×1000) (average, 256. 8 ); the individual relative fecundity r/l varied between1, 410 and 18, 610 (eggs/cm) (average, 7,540) and r/q between 125 and 907(eggs/g)(average, 548). The variability is shown diagrammatically as scatter diagrams offecundity and standard-length, body-weight, age, growth coefficient of condition,standard-length×body-weight (l·q) and (l·q)~(1/2) in Figs. 1-3, 8-11. 2. The dynamical peculiarities of individual fecundity (r and r/l) of theKuanching-yang spawning population, like the Taichu-yang spawning population,increase with increase in weight, length and age. The relations of individual absolutefecundity (r) and individual relative fecundity r/l to length and age are curved,but differently sloped, and to weight are linear. The individual relative fecundity r/qdoes not increase or decrease markedly with length, weight and age. 3. The relations of individual fecundity (r,r/l, r/q) to coeffecient of condition(K =W/L~3 × 100) and to relative condition coefficient (K=W/W ×100) are not quiteobvious, i .e. ) they do not increase or decrease regularly with K and K. 4. The fecundity coefficient (C=(l·q)/r) varied between 0.22 and 1.912,mostly between 0.42 and 0.82.The individual absolute fecundity (r) was found to be related to "l·q" and "(l·q)~(1/2)" linearly, it was like the relation between individualfecundity (r, r/l) and body-weight. Thus the fecundity coefficient is still a goodindex for determining the peculiarity of individual fecundity of fish. 5. The individual fecundity (r, r/l) not only increases with increase of lengthand weight, but also relates to peculiarity of sexual maturity, i .e. , the individualsof first maturity have a lower mean individual fecundity than individuals of repeatedsexual maturity. 6. The fast-growing individuals have a higher mean individual fecundity (r,r/l) than slow-growing individuals in the same age-group. Therefore growth is oneof the main influential factors.

本文是研究大黄鱼生殖力种内变异的第二篇报告。所依据的材料是1959年5月在福建东北部官井洋产卵场收集的,共计算了173个样品。据以观察分析的标本全系未出现透明和游离状卵子的典型Ⅳ期卵巢。卵子计数取样与处理方法以及术语概念均与作者在“浙江岱?洋大黄鱼个体生殖力的研究”一文中所述者完全相同。 生殖力是影响种群世代数量的最初一个环节,同时,福建官井洋大黄鱼春季生殖种群是闽-粤东族大黄鱼主要生殖种群之一;因此,了解这一生殖种群的个体生殖力特性不仅具有理论上的意义,而且对于进一步研究该种群数量变动及其渔业预报亦有实践意义。

In this paper, authors have analysed distribution pattern of individuals of 14 dominant plant populations in Aneurolepidium chinensis steppe community by interpolation method of 2 dimensional net function.According to data obtained by net method, the values of net point are computed by interpolation formula. The results of computation are output by the computer, the computer prints and outputs the distribution pattern diagram of individuals of each species population.The distribution pattern diagrams offer following...

In this paper, authors have analysed distribution pattern of individuals of 14 dominant plant populations in Aneurolepidium chinensis steppe community by interpolation method of 2 dimensional net function.According to data obtained by net method, the values of net point are computed by interpolation formula. The results of computation are output by the computer, the computer prints and outputs the distribution pattern diagram of individuals of each species population.The distribution pattern diagrams offer following informations:1. The spatial distribution types of individuals of 14 plants population;2. The scales of 'clumps';3. The total area of 'clumps'.The diagrams of mosaic pattern of populations are able to reflect directly the relation of Spatial disposition among various populations and provide the type of mosaic.The problems involved in applying interpolation method and the size of sampling area for the studies of distribution pattern of populational individuals are also discussed.

本文用二维网函数插值法,对羊草草原群落14种主要植物种群的个体分布格局作了分析。 根据网格法获取的数据资料,应用插值公式计算网点值,全部计算过程由电子计算机实现。计算结果由计算机输出并打印出每个种群的个体分布格局图。 分布格局图提供了以下信息: 1.14种植物种群个体的空间分布类型; 2.聚块的大小; 3.聚块的合计面积。 种群的镶嵌格局图直观的反映了种群之间在空间上的配置关系,并可给出镶嵌体的类型。讨论了研究种群个体分布格局的取样面积以及应用插值法存在的问题。

In this paper, a new method for the study of the spatial pattern of population in plant communities is presented. In comparison with the method of contiguous grid quadrats which was recommended by Greig-Smith (1952 and 1964), the new method has the following advantages.1. The results obtained by use of this new method are of higher accuracy. In addition, the computer is able to print and output the scale and shape of clumps of plant population,the distribution pattern of clumps in the sampling plot, the total...

In this paper, a new method for the study of the spatial pattern of population in plant communities is presented. In comparison with the method of contiguous grid quadrats which was recommended by Greig-Smith (1952 and 1964), the new method has the following advantages.1. The results obtained by use of this new method are of higher accuracy. In addition, the computer is able to print and output the scale and shape of clumps of plant population,the distribution pattern of clumps in the sampling plot, the total area of clumps of each kind of plant in the sampling plot, and the total amount of each kind of plant, etc..2. The new method is applicable for the study of the pattern of natural plant communities.In this paper, the computational formulas used in data processing and the mathematical principle for computational formulas are offered, and the definition of the outputting boundaries (rounding off boundaries) and its mathematical principle are also recommended.Besides, this paper elucidates the analysis of computational results and the procedure of processing random mosaic geometrical 'clumps' and sampling plots of the simulated grassland.

本文给出一种研究植物群落种群分布格局的新方法。该方法与英国著名生态学家Greig-Smith提出的“邻接格子样方法”相比较,具有如下优点: 1.用计算机算出的结果,具有令人满意的精度。当计算完毕后,机器能打印输出植物种群斑块大小、斑块在样地平面上分布的状况,样地上某种植物斑块的总面积,种群个体的总数等有关信息。 2.适用于天然植物群落种群分布格局的研究。 本文讨论了处理数据时采用的计算公式,所依据的数学原理以及如何确定输出界限(舍入界限)等问题。 此外,文中还叙述了用该法对随机相嵌几何斑块图形,人工模拟草地样方进行处理的过程和计算结果分析。 源程序是用BASIC语言编制的。

 
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