at random 任意,随便; 任意地,随机地; 随便地,任意地; 随机的,任意的; 随机地,任意地; 随意地,任意地; 随意地,随机地
random n. 〔罕用语〕胡乱行为,偶然的[随便的]行动[过程]。 adj. 1.任意的,胡乱的,随便的;(话等)信口乱说的;(人等)偶然碰到的。 2.随机的;【物理学】无规则的;(石工)(大小)不齐的。 a random guess 瞎猜。 a random shot 乱射(的子弹);流弹。 at random 碰运气地;无目标地,漫无目的地。 n. -icity 随机性,无规性。
distribution n. 1.分配,分发,配给;分配装置[系统];配给品;配给量;【经济学】配给方法,配给过程;分红;【法律】(无遗嘱死亡者的)财产分配。 2.分布,配置,分布状态;【生物学】(生物的)分布范围;【无线电】频率分布。 3.分类,整理,区分。 4.【电学】配电;【机械工程】配汽;【印刷】拆版;【逻辑学】周延(性)。 5.销售。 the distribution of wealth 财富的分配。 the accurate distribution of zoological specimens 动物品种的精确分类。 live on charitable distributions alone 完全依靠配给救济品生活。 the distribution of coniferous forests 针叶林的分布范围。 the distribution of troops 部队配置。 The distribution of our school paper is now 3000. 我们校刊的发行量现在是3000份。 We have a good harvest but our distribution is bad. 我们丰收了,但是产品卖不出去。
Microsatellite dna is among the most efficient class of molecular markers due to their hyper - variable and co - dominant nature with relatively high abundance and random distribution in the genome , and have been applied to a variety of fields including population differentiation , kinship analysis , linkage analysis , and evolutional and ecological studies 摘要微卫星dna由于具有高度多态性、共显性遗传、基因组中含量丰富且随机分布等特点,目前已成为最有效的分子标记之一,并应用于种群分化研究、血缘分析、基因连锁分析、进化以及生态学研究等许多领域。
The mean and the mean square error of the difference between the scattering field and the cancellation field are calculated . the probability of the cancelled effect under the given errors is also computed in the cases that the azimuth angle varies with the law of uniform and random distribution , respectively 此外,还对被保护目标散射场的对消效应作了统计分析,计算了对消场和散射场误差的均值和均方差,并在方位角以均匀和随机规律变化时给出了它们在给定误差值下存在的概率。
As examples , heterogeneous anisotropic fractured rocks of which the autocorrelation functions of crack number density can be described as 2 - dimensional exponential ellipsoidal or gaussian function were simulated especially . the results show that : 1 ) the random distribution characters could be different for different elastic constants under the same random distribution of crack number density . 2 ) the exponential ellipsoidal heterogeneous anisotropic random fractured model could be a suitable model for the multi - scaled and self - similar heterogeneous media 模拟结果表明: 1 )弹性常数的分布特征与裂纹数密度的分布特征不相同,并且裂纹数密度对不同的弹性常数有不同程度的影响; 2 )指数椭圆型随机裂缝模型适用于模拟具有多尺度、自相似的特性非均匀裂缝岩石; 3 ) gaussian型随机裂缝模型适用于模拟单尺度、平滑的非均匀裂缝岩石。
It was shown that in most cases p . euphratica appeared to have an aggregative distribution at different distances away from the river but it tended to be diffusive , appearing to have an random distribution ; in the two cross sections , p . euphratica tended to increase its distribution pattern scale and aggregation intensity as the distances increased and the distribution pattern scale of p . euphratica in kaerdayi cross - section was lower than that in yingsu cross - section at the same distances away from the river , which was because the cross sections had different underground water conditions and topographical conditions 结果表明:胡杨在不同离河距离大都表现为聚集分布,在离河最远的地方有扩散趋势,呈随机分布;不同离河距离的两断面均表现出随离河距离加大胡杨格局规模加大、聚集强度加强的趋势,同一离河距离喀尔达依断面比英苏断面胡杨格局规模小,这主要是地下水条件和当地地形不同所致。
The competition among those species like s . tsinyunensis , dryopteris erythrosora and veronicastrum stenostachyum etc . , is intense in the communities , which may be one of the reasons why s . tsinyunensis is going to be endangered and with a very restricted distribution . the distribution patterns of the seven populations of s . tsinyunensis are clumped among the eight populations we studied , except population v of random distribution . the spatial pattern of 6 populations of s . tsinyunensis have high consistency with the negative binominal distribution , while another 2 populations , i . e . , i and iii are poisson distributions 6 )缙云黄芩各种群空间分布格局基本呈聚集分布,其中7个种群的分布格局类型是聚集分布,其聚集强度较高,另有一个种群为随机分布;其种群的离散分布拟合结果也严格符合一定的数学模式,其中负二项分布、 poisson分布分别是该物种种群空间分布的理论分布模式,其中6个种群拟合出的结果是负二项分布,种群i和种群m拟合出的结果是poisson分布。