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田间分布
field distribution
FIELD DISTRIBUTION MODEL OF CROP YEILD UNDER PROTECTION OF SHELTER FOREST 防护林保护下农作物产量的田间分布模型 短句来源 Mathematical Model of Field Distribution of Growing Matured Crops 成熟农作物田间分布的数学模型 短句来源 The field distribution and expanding of wheat sharp eyespot can be described with several parameters, such as X1, X2, X3, X4. Fuzzy clustering analysis describes the condition of the field distribution of wheat sharp eyespot, of both horizontal expanding and vertical directions. 小麦纹枯病的田间分布和扩展，通过X1、X2、X3、X4几个参数来描述。 短句来源 The Preliminary Study of Field Distribution Pattern and Sainpling of Maladera Orientalis 黑绒金龟田间分布型及抽样技术初步研究 短句来源 A PRELIMINARY STUDY AND APPLICATION ON FIELD DISTRIBUTION TYPE OF WHEAT STEM MAGGOT OVA 麦秆蝇卵田间分布型的初步研究与应用 短句来源 更多 “田间分布”译为未确定词的双语例句
Definition and Calculation of Uniformity of Plant Distribution in Crops Field 植株田间分布均匀度的定义与计算 短句来源 The main reason of aggregation is the difference of enviroments. There are double groups in the spatial distributions, the area of them is 1. 10～1. 32m2 and 0. 44～0. 90m2 seperately. 三种虫态在田间分布的基本成分是疏松的双重个体群,大小个体群面积分别为1.10～1.32m~2和0.44～0.90m~2。 短句来源 The theoretical sampling value could be calculated based on the distribution type of rice plant sheath blight and random sampling with the distribution index method. 用分布型指数法中常用的几种方法——扩散系数（C）法、K值法、平均拥挤度（x）法、x－x回归关系法，根据纹枯病的田间分布型和随机无放回抽样计算出理论抽样数。 短句来源 DISTRIBUTION PATTERN OF WHEAT POWDERY MILDEW INCIDENCE IN FIELD 小麦白粉病田间分布型的初步研究 短句来源 Study on the Spatial Distribution Patterns of Anopheles Sinensis Larvae in Paddy Fields 中华按蚊幼虫田间分布型研究 短句来源 更多 相似匹配句对
(2) modeling of distribution in the field; 田间分布模型; 短句来源 THE SPATIAL DISTRIBUTION OF CHILO SUPPRESSALIS WALKER LARVAE IN PADDY FIELD 二化螟幼虫的田间分布 短句来源 The distribution of fimA genotype in periodontitis patients was detected by PCR. GINGIVALIS的分布; 短句来源 Distribution of acceleration of gravity 重力加速度的分布 短句来源 
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The magnetic field distribution of an emission antenna is studied in this paper.
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The magnetic leakage field distribution resulting from linear defects of a tube sample in the geomagnetic field is modeled according to the magnetic dipole theory.
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Computational fluid dynamics (CFD) method was applied to solve the Reynolds-Averaged Navier-Stokes equation (RANS) and to find flow field distribution to get the value of the object function.
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The electric field distribution around a charged satellite in a rarefied magnetospheric plasma influences greatly the densities and trajectories of particles measured by onboard instruments.
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In this work, two three-dimensional models of the electric field distribution around the satellite are considered under the conditions when the Debye length is comparable to the geometrical size of the spacecraft.
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In connection with experiments on the control of the rice stem borer, aseries of observations were conducted in 1949 to 1952 in Canton to determinethe form of the distribution of the moth, the egg-mass and the larval popula-tions of this species. It was found that the moth and egg-mass populations inrice seed-beds are in essential agreement with the random distribution of thePoisson series. The larval population in spring-crop fields apparently conformsto the contagious and the negative binomial distributio... (一)本文就昆虫常见的数种集团分布:潘松分布、核心分布和负二项式分布的公式、性质和例子等略加讨论介绍。 (二)我们在广州附近对三化螟各时期和白穗、枯心苗的田间分布型式作了初步的调查,所得结果如下: 1.螟蛾和卵块在秧田上是随机分布的。 2.幼虫在本田分布不随机,符合核心分布和负二项式分布。 3.白穗在田间的分布不随机,1×1丛、2×2丛、……6×6丛各种取样单位型样本均符合负二项式分布,4×4丛、5×5丛和6×6丛三种取样单位型样本则更符合核心分布。 4.稻遗株内越冬幼虫分布不随机,亦不符合核心分布,但符合负二项式分布。 5.晚造本田枯心苗田间分布不随机,符合核心分布和负二项式分布。 (三)本文就昆虫集团分布型式的调查在实用上的意义,联系到三化螟来讨论,我们论及与虫害调查取样技术、田间试验设计、统计代换方法、昆虫生活习性和害虫防治等各方面的关系;其中取样技术方面... 文摘来源 During the course of studies on the population dynamics of the European corn borerin Peking from 1961 to 1964, data were secured on the egg populations in a total of 19fields of spring-sown corn at whorl-stage. Based upon these data, the following pointswere analyzed: (1) The distribution pattern of the egg masses in corn fields. (2)Relations between the percentage of plants with one or more egg masses and the numberof total egg masses accumulated during the entire whorl-stage. (3) Relations betweenthe numb... 根据1961—1964年对两个品种、19块春玉米地心叶期着卵量及着卵株率的调查资料,分析了:1)卵块在田间的分布型式,2)着卵株率与百株累计卵量的关系,3)百株高峰卵量与累计卵量的关系。 分析表明:心叶期卵块在田间的分布型式符合于随机分布,因此着卵株百分率与百株累计卵块数之间存在着正相关的关系。 着卵株率(p)与百株累计卵块数(x)间有 P=1-e~(-0.00985_x~(0.9984))的曲线函数关系。作者利用此式制成了一个由著卵株百分率来推算百株累计卵块数的检索表(表3)。 心叶期百株高峰卵块数(x)与百株累计卵块数(Y)之间则有直线回归的关系,以百株高峰卵块数估计百株累计卯块数的回归式为:Y=11.47+2.64x。 利用上述两种调查方法来估计心叶期的累计卵块数可以大大节省时间和人力。这两个方法在实用上各有其优缺点,可以根据具体情况任用一法。 文摘来源 Date were collected trom 9,8and 5 fields on 20-22 July,10-12 August and10-12 September,1979 respectively.Sampling of each fields was done in a stra-tified random in from 20×100M to 100×100M“blocks”,each consisting of fiveto sixteen 25×25M plots.In rows atach plot 5 adjacent plants were sampled down therow on each of 2 adjacent rows at4locations within the plot.The paired 5-plantsamples produced a total of eight 5-plant samples/plot or 40 plants.For eachblock 320 plants(8×40)to 640 plants(16×40)were sampled.... 1979年7月20—22日、8月10—12日、9月10—12日分别从9、8、5块大豆田,应用分层随机抽样法进行豆秆黑潜蝇田间分布型调查。按豆田大小分別规划出各包括5至16个小区的区组。区组面积为20×100M 至100×100M。每小区面积为25×25M(个别田的小区为20×20M)。在每小区内随机抽样4点,每点两排,每排5株。每区组抽样320株(8×40) 至640株(16×40)(个别田为5×40株)。将豆株携回室内进行剥查。所获资料应用电子计算器(Casio fx—140)进行频次分布适合性测定。7月代的低密度虫口符合潘松分布,而8月、9月高密度虫口符合负二项分布与核心分布。样点含量大小以及豆株不同部位的虫口数影响样本的分布。一些扩散型指数(如 Ca、I、L)以及平均拥挤度与平均数的回归关系在本文中应用并加以讨论。 文摘来源 << 更多相关文摘 
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