1)seed distribution种子分布
1.Equal interval group was arranged for paddy seed separation,and paddy seed frequency falling into different groups under different experiment conditions was statistically analyzed,paddy seed distribution after separation was verified.试验结果表明,与圆周排列电极分选相比较,电极轴向排列时种子的脱落角大,并且种子分布样本标准差大,有利于将不同质量的种子分散开,有利于种子分选;落地种子分布符合正态分布,分选种子试验的重复性好,分选过程中种子相互碰撞明显减少,有利于区分不同级别的种子。
2)distribution of individuals种群分布因子
1.The distribution of individuals and competition between parents and children are discussed as factors that can improve the efficiency of genetic algorithm in this paper.提出了一种改进的自适应遗传算法,通过在遗传算法中引入种群分布因子以及父子间的竞争机制,从而可以避免出现“早熟”现象,提高遗传算法的搜索效率。
3)seed dispersal种子散布
1.Seed dispersal is a key process determining the spatial pattern of plant populations.共有 1 0种蚂蚁参与了澜沧舞花姜的种子散布 ,距离为 0 。
2.To clarify regenerative traits and explore effects of canopy cover, density, distance, dispersers, or predators on fates of seeds or seedlings of Phoebe bournei , fruit fall, seed bank, seed dispersal, fruit/seed predation, seed germination and seedling survival were examined in a mid\|subtropical evergreen broadleaf forest in Luoboyan Nature Reserve, southeastern China.从 1 995至 1 998年 ,通过种子收集器布设、不同程度圈围的样方处理、实验室和野外发芽实验、相邻格子样方调查和土壤中种子的筛选等一系列方法 ,对福建罗卜岩闽楠种质资源保护区内闽楠为优势的常绿阔叶林群落中闽楠种群的果实、种子库、种子散布、果实 /种子捕食、种子萌发和幼苗存活等进行了研究。
3.Effective dispersal is one essential course for invasive species on their process of invasion, while study on the effectiveness of seed dispersal was often neglected when predicting species invasion.有效的种子散布是木本植物形成入侵种需要经历的过程之一,但在预测入侵种时却常常被忽略。
英文短句/例句
1.THE ROLE OF ANTS IN SEED DISPERSAL OF GLOBBA LANCANGENSIS AND THE SPATIAL DISTRIBUTION OF ITS SEEDLINGS蚂蚁对澜沧舞花姜种子散布及种苗空间分布格局的影响
2.To scatter widely, as in sowing seed.传播，散布，如种子
3.sow the seeds of distrust[喻]散布猜疑的种子
4.Study on Seed Germination and Seed Dispersal of Several Plants in Arid Area;几种干旱区植物种子萌发和散布特征的研究
5.Only during exceptionally heavy seed years is there much opportunity for wind dispersion.仅仅在特别好的种子丰收年，才有较多的机会靠风来散布。
6.Influence of Tungsten Dispersion and Tungsten Species Distribution on the Performance of W/HZSM-5 in C2H2-SCR;钨在HZSM-5分子筛上分散及钨物种分布对催化剂C_2H_2-SCR性能的影响
7.The wind puffed away the seeds of the dandelion.风吹散了蒲公英的种子。
8.The spreading of such ideas is of great disservice to the state.散布这种思想，对国家极为不利。
9.John is not the kind of man to spread a fairy tale.约翰不是那种爱散布虚妄之说的人。
10.This very short "gun barrel" will help reduce dispersion.这种很短的“炮筒”有助于减小散布。
11.he might want to plant a false rumour.很可能他想散布一种谣言。
12.The story is being bandied about that you are going to leave现在正散布一种流言，说你要离开此地。
13.Probability distributions are classified as either discrete or continuous.概率分布为离散型和连续型两种。
14.a low spreading or prostrate shrub of southwestern United States with small acorns and leaves resembling those of the huckleberry.美国西南的一种散布的或俯卧的灌木，有类似越橘类植物的小橡树果和叶子。
15.In the eleven provinces it has sown many seeds which will sprout, leaf, blossom, and bear fruit, and will yield a harvest in the future.它散布了许多种子在十一个省内，发芽、长叶、开花、结果，将来是会有收获的。
16.untidy tenements sprawling toward the river.散布在河边的几套不整洁的房子
17.There's Mrs.Brien taking her brood for a walk.布莱恩太太正领着她那群孩子散步呢。
18.Butterfly (star): Variant: the fin rays run evenly in the body colour into the fin ends (star shaped into the outside colour).蝶翼（环型）：变化种。两种颜色以分散的环状散布在所有鳍上。
相关短句/例句
distribution of individuals种群分布因子
1.The distribution of individuals and competition between parents and children are discussed as factors that can improve the efficiency of genetic algorithm in this paper.提出了一种改进的自适应遗传算法,通过在遗传算法中引入种群分布因子以及父子间的竞争机制,从而可以避免出现“早熟”现象,提高遗传算法的搜索效率。
3)seed dispersal种子散布
1.Seed dispersal is a key process determining the spatial pattern of plant populations.共有 1 0种蚂蚁参与了澜沧舞花姜的种子散布 ,距离为 0 。
2.To clarify regenerative traits and explore effects of canopy cover, density, distance, dispersers, or predators on fates of seeds or seedlings of Phoebe bournei , fruit fall, seed bank, seed dispersal, fruit/seed predation, seed germination and seedling survival were examined in a mid\|subtropical evergreen broadleaf forest in Luoboyan Nature Reserve, southeastern China.从 1 995至 1 998年 ,通过种子收集器布设、不同程度圈围的样方处理、实验室和野外发芽实验、相邻格子样方调查和土壤中种子的筛选等一系列方法 ,对福建罗卜岩闽楠种质资源保护区内闽楠为优势的常绿阔叶林群落中闽楠种群的果实、种子库、种子散布、果实 /种子捕食、种子萌发和幼苗存活等进行了研究。
3.Effective dispersal is one essential course for invasive species on their process of invasion, while study on the effectiveness of seed dispersal was often neglected when predicting species invasion.有效的种子散布是木本植物形成入侵种需要经历的过程之一,但在预测入侵种时却常常被忽略。
4)even distribution of seed种子均布
5)species distribution物种分布
1.Application and comparison of generalized models and classification and regression tree in simulating tree species distribution;广义模型及分类回归树在物种分布模拟中的应用与比较
2.The stability constants and species distributions of complexes of two lanthanide ions,Eu(Ⅲ) and Tb(Ⅲ),with a macrocyclic ligand,3,6,9,17,20,23-hexaazo-29,30-dihydroxy-13,27-dimethyl-tricylco-[23,3,1,1~(11,15)]triaconta-1(28),11,13,15(30),25,26-hexane(BDBPH),in 1∶1 and 2∶1 system,were determined potentiometrically in 50% ethanol solution,at 35.用电位滴定法研究了24元大环多胺(BDBPH)-Eu(Ⅲ)和BDBPH-Tb(Ⅲ)溶液中络合物的稳定性和物种分布,分析了不同pH条件下各物种的存在形式及变化趋势。
3.The review focus on that the response of species distribution to global warming.综述了物种分布对全球变暖的响应。
6)distribution of ore types矿种分布
延伸阅读
种群分布型种群分布型distribution patterns of population 种群分布型(distribution patterns of po-pulation)种群在一定时间和空间内个体群的分布形式。具有两个含义:其一是指生物在某一时刻位置的排列方式，反映生物的空间结构，或称空间格局(spatial pattern)，另一是在统计学上反映抽样单位的抽样性质和数量，指抽样单位中所得随机变量取各种可能值的概率分配方式，或称空间分布(spatialdistribution)。研究昆虫种群的空间分布型有助于制订正确的抽样方案与种群数量估计。如为随机分布时，则可用随机抽样方法;如为聚集分布时，则宜用分层随机抽样等方法抽样调查。也有助于了解昆虫的猖撅，扩散行为。昆虫的空间分布型，不但因物种而异，且同一种群也会因虫龄、密度或生境条件不同而有差别(见频次分布测定法)。昆虫种群空间分布型可分为随机分布(random distribution)和聚集分布(aggre·gated distribution)两类。 随机分布昆虫种群内各个体间具有相对的独立性，不相互吸引或相互排斥，种群中的个体占据空间任何一点的概率相等，任何一个体的存在决不影响其他个体的分布。属于这类分布的有泊松分布(poissondistribution)，如三化螟、玉米螟卵块的格局等(图a)O泊松分布因均数与方差相等(万=52)，故其概率公式中仅一个参数(娜):Px一刀尸沁二e一m四经Ne X!一m塑二 X!式中Px为某种取样单位中，有x个个体的概率(x=O，1，2，……);m为总体均数，可由样本均数代表;N为取样单位数;入7改为理论频数;e为自然对数的底(e-2 .71828…)。 聚集分布种群内个体间互不独立，可因环境的不均匀或生物本身的行为等原因，呈现明显的聚集现象。总体中一个或多个个体的存在影响其他个体在同一取样单位中的出现概率，其均数(牙)都小于方差(s2)o是一种非随机分布。属于这类分布的有:奈曼分布(Neyman’5 distribution)、P一E核心分布(Polya-Eggenberger distribution);泊松一正二项分布(Po-isson一binomial distribution)和负二项分布(11egativebinomial distribution)。 奈曼分布奈曼1939年提出。种群格局非随机，呈核心状格局，但核心间的格局是随机的，核心的大小相等(图b)。奈曼分布依据参数n的不同又可分为不同的类型(如对应”=0、1、2为A、B、C型等)。其理论公式为: NPo=Nexp(一m，e”f‘0，)NPx+:一N翌全凡Px一* X十Ik二O _1式中F*=兀舟一f‘“+”(o) k!“ 、(。卜。!(一、，)一「。
