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artificial population
相关语句
  人工种群
     Pavement Distress Detection Based on Artificial Population
     基于人工种群的路面裂纹检测
短句来源
     Natural regeneration and dispersal of artificial S.caseolaris population had more or less occurred,which may increase the structural complexity and stability of the artificial population.
     海桑人工种群已经出现某种程度的自然更新和扩散,这将有利于增加海桑人工种群的结构复杂性和稳定性.
短句来源
     STUDY ON THE ARTIFICIAL POPULATION STRUCTURE OF Amomum tsao-ko
     草果人工种群结构研究
短句来源
     Pavement distress survey by artificial population and Agent
     基于人工种群和Agent的路面裂纹检测算法
短句来源
     Technique report on natural breeding research of artificial population of the crested ibis
     朱鹮人工种群自然繁育研究技术报告
短句来源
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  “artificial population”译为未确定词的双语例句
     Seasonal Dynamics of the contents of N,P,K,Na,Ca and Mg and their distribution in different organs and at different height were studied in the aboveground part of artificial population of Puccinellia tenuiflora.
     研究星星草人工草地地上部N、P、K、Na、Ca、Mg含量的季节动态及其在不同器官和不同株高的分布情况。
短句来源
     Intestinal bacteria of nympha of Eupolyphaga sinensis Walker,collected from natural and artificial population,had been isolated and identified. The identification results about 11 bacteria strains was that they belong to:Acinetobacter,Citobacter,Salmonella,Sporolacillus,Arthrobacter,Enterobacter,Terrabacter,Actinobacillus,Klebsiella,Serratia,Yokenella respectively.
     鉴定结果表明,上述11个细菌菌株依次分别属于:不动杆菌属(Acinetobacter)、柠檬酸杆菌属(Citobacter)、沙门菌属(Sal-monella)、芽胞乳酸杆菌属(Sporolacillus)、节杆菌属(Arthrobacter)、肠杆菌属(Enterobacter)、地杆菌属(Terrabacter)、放线杆菌属(Actinobacillus)、克雷伯菌属(Klebsiella)、沙雷菌属(Serratia)、预研菌属(Yokenella)。
短句来源
     Our investigation is focused on the basic framework for artificial population systems, evaluation and validation of population policies, as well as control and management of sub- or whole population systems.
     主要工作包括人工人口系统的基本框架,计算试验与人口政策的评估、平行系统与人口的控制与管理,以及基本综合集成研讨厅的实现方式。
短句来源
     Population Studies and Artificial Societies: A Discussion of Artificial Population Systems and Their Applications
     人口问题与人工社会方法:人工人口系统的设想与应用
短句来源
     euchroma. The flower numbers,fruiting rate,seed-set rate and seed yield per plant,the frequency distribution of flowers producing one,two or three seeds,and(1 000)-seed weight were far lower in natural habitat than that in artificial population and there was extremely significant difference between them.
     自然居群软紫草植株的花数、结实率、结1~2粒和3粒种子的花的频率分布、种子产量、结籽率及种子千粒重均远低于人工栽培居群,彼此间存在极显著差异;
短句来源
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  相似匹配句对
     Pavement distress survey by artificial population and Agent
     基于人工种群和Agent的路面裂纹检测算法
短句来源
     Pavement Distress Detection Based on Artificial Population
     基于人工种群的路面裂纹检测
短句来源
     ⑤population;
     ⑤人口的变化;
短句来源
     In small population?
     大群体中则稳定下降、波动较小。
短句来源
     ARTIFICIAL MARBLE
     人造“大理石”
短句来源
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  artificial population
This may have been mediated either by artificial population structures due to a probable long history of cultivation, or via Pleistocene refugia effects.
      
To examine the response of pollinating bees to size and sexual phases of flowers, we constructed an artificial population ofCampanula having large flower variation and presented it to potentially pollinating bees in nurseries.
      
If artificially cultured individuals are released with marks or distinguished from wild individuals or if no wild individual exists in the study area, we can estimate both the mortality and dispersal rates of the artificial population.
      
Pollen flow in an artificial population of Eucalyptus grandis was estimated using molecular markers and paternity analysis.
      
Comparisons are made between the model calculation and Barlow's observation on an artificial population of mouthbreeder fish.
      
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The theory and method of Grey-Markov model of plant population and its application in the imitation and prediction of the natural thinning of Japanese larch artificial population were studied. The results show that the Grey-Markov model is more effective and convenient than the other models.

探讨植物种群灰色-马尔柯夫模型的理论和方法。对日本落叶松人工种群的密度的自然变化过程模拟和预测,表明灰色-马尔柯夫模型是一种较为理想的种群动态模型。

As we know, crop production is a colony process. But how to research crop production as a colony process is still unsolved. Through analysing the orientation and results between natural selection and artificial selection, this paper indicated that both selections result in competition for the existence of the natural population, and in improving economic yield of the artificial population, respectively, and orientations of both selections are colony superority for artifical popula tion, and individual...

As we know, crop production is a colony process. But how to research crop production as a colony process is still unsolved. Through analysing the orientation and results between natural selection and artificial selection, this paper indicated that both selections result in competition for the existence of the natural population, and in improving economic yield of the artificial population, respectively, and orientations of both selections are colony superority for artifical popula tion, and individual superority for natural population. So researches of crop production should be made great efforts on decreaing individual competion ability and increasing reproductive allocation. On the basis mentioned above, this paper also discussed problems on wheat heigh, root system size and application of population ecology in agricultural practices.

从分析自然选择和人工选择在目标和方向上的重大差异入手,指出自然选择的核心是生存竞争,其结果产生个体优势;人工选择的方向是群体优势,其目标是获得较高的经济产量。作物是典型的人工选择的产物,研究作物的生产过程就应当以降低个体的竞争能力和提高繁殖分配为主。据此,对小麦植株高度、根系特征以及种群生态学在农业中的应用进行了讨论

Mosla hangchouensis Matsuda is an endangered species distributed along the coastal areas of Zhejiang Province. We studied the pollination intensity, pollinators' efficiency and nutlet set in a natural population in Hangzhou and an artificial population in Beijing Experimental Garden of our Institute to test the hypothesis that nutlet set is dependent on pollination intensity and pollinators' efficiency. Although this species is self-compatible, careful examination on stigmas of virgin flowers revealed...

Mosla hangchouensis Matsuda is an endangered species distributed along the coastal areas of Zhejiang Province. We studied the pollination intensity, pollinators' efficiency and nutlet set in a natural population in Hangzhou and an artificial population in Beijing Experimental Garden of our Institute to test the hypothesis that nutlet set is dependent on pollination intensity and pollinators' efficiency. Although this species is self-compatible, careful examination on stigmas of virgin flowers revealed that no stigma was pollinated before corolla opening due to the spatial isolation between stigmas and anthers. This indicated that nutlet set is dependent on pollinators. Hand pollination experiment in the natural population showed close nutlet set between self-pollination, geitonogamy and cross-pollination. Significant effect of pollination intensity on nutlet set was found by the analysis of variance of nutlet set(F=71 606***, P <0 01). To determine the dependence of nutlet set on pollination intensity, we compared the nutlet set of three populations with different pollination intensity. 1) Artificial population with intensive pollination: the pollinators were honeybees, and the nutlet set was the highest(>90%). 2) Hangzhou natural population of normal flowering phenology with lower pollination intensity: the major pollinators were Lasioglossum , the nutlet set was lower(45%~73%). 3) The same population as 2) but composed of early flowering individuals: the pollination intensity and the nutlet set(18%~58%) were the lowest. The difference in nutlet set between three kinds of pollination intensity was statistically significant ( P <0 01). On the contrary, the position of flowers on inflorescence had no significant effects on nutlet set. The highest nutlet set of artificial population might also be attributable to the pollination efficiency of pollinators. Pollinator whose body was hair rich and body size matched well with corolla width (such as honeybees or Amegilla zonata ) took more pollen grains away and has higher probability to pollinate the stigmas by one visit to virgin flowers than small pollinators such as Lasioglossum .

杭州石荠苎(MoslahangchouensisMatsuda)自交亲和,人工自花授粉、同株异花授粉和异花授粉的结实没有明显差别。杭州自然居群中新开花朵的调查没有发现闭花传粉现象,原因是花药和柱头之间存在空间隔离和发育上的时间隔离。这些隔离使昆虫成为花粉传播的必要媒介,结实从而取决于传粉昆虫的活动。对比研究发现,传粉对结实有极显著的影响(F=71606),而花朵在花序中的位置对结实不存在显著的影响。杭州石荠苎自然居群的传粉强度小于北京实验居群,结实率也显著低于北京实验居群。在杭州自然居群中,早花植株的传粉强度小于正常花期植株的传粉强度,在结实上也有极显著差别。自然居群和实验居群除传粉强度不同外,传粉昆虫的传粉效率也有明显的差别。实验居群的传粉昆虫是效率高的蜜蜂,其个体数量占有绝对优势;而自然居群高传粉效率的昆虫非常少见,主要传粉昆虫是效率较低的淡脉隧蜂,且不到访花昆虫的一半。作者认为,杭州石荠苎的结实受传粉强度和传粉昆虫的传粉效率的限制。针对与结实有关的传粉效率问题,作者提出“有效传粉”的概念,即在柱头的可接受期内有足够多的有活力的花粉到达柱头才能保证结实达到最大。

 
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