Seed-base stimulate the number of first-order lateral root and ensure its even distribution, which will play an important role in enhancing the root absorbency and the soil conservation function. 种基盘可以促进苗木一级侧根条数增加和均匀分布,对提高苗木吸收水肥能力和保土固土能力有着积极的作用。
Relation between the Volume-weighted and Number-weighted Grain Volume Distribution Function 体积权重与个数权重晶粒体积分布特征的相互关系
The oscillation of photon number distribution and the purity in an odd or even coherent state are investigated with the characteristic function methods. 用特征函数方法讨论了奇、偶相干态在热混沌光场态影响下的光子统计性质.讨论表明,热光场态的影响使得奇、偶相干态纯度随参数变化呈现复杂的特性;
Unscented Kalman filter ( UKF) is utilized to select particles, rendering smaller number of particles to approximate the posterior probability distribution, thus converging at global minimum of experimental loss function. 采用无迹卡尔曼滤波(UnscentedKalmanFilter,UKF)产生粒子,以较少的粒子逼近状态的后验概率分布,搜索到经验风险函数的最小值。
A large number of experiments concerning the porosity of desulfurizers have been carried out by using the mercury porosimetry method of micro-analysis, which indicate that the pore size distribution follows Gaussian function; a pore size distribution model for simulating SO_2 reacting with porous CaO was thereupon established. 借助压汞分析微观手段对脱硫剂孔结构的特性进行了大量的实验,表明脱硫剂的孔径分布满足高斯函数分布形式,建立了SO2和多孔CaO反应的孔分布数学模型。
By improving the molecular interaction energy model, an equation for coordination number of pure fluid at high temperature was obtained with the help of the radial distribution function theory and virial equation. 从改进的势能函数出发,由径向分布函数理论和维里方程导出高温下纯流体配位数的计算公式,并与Sandler法结合求得简化的扰动型软球状态方程。
The proposed genetic encoding method completely embodies the number and position distribution for the selected hidden center vectors in the pattern sample space, and involves information of the corresponding controlling parameters of the kernel function. 提出的染色体编码方式,充分体现了所选隐中心矢量在模式样本空间中的数量及位置分布,同时还包含了相适应的核函数控制参数信息。
The marginal recursive equations on excess-of-loss reinsurance treaty were investigated, under the assumption that the number of claims belongs to the family consisting of Poisson, binomial and negative binomial, and that the severity distribution had bounded continuous density function. 在索赔数目服从Poisson分布、二项分布或负二项分布,以及索赔额分布的密度函数连续且有界的条件下,研究了溢额损失再保险条款的总体损失分布的条件递推方程。
The variations of number concentration, volume and size distribution function with height are studied. 研究了粒子浓度、体积、及粒度谱分布函数随高度的变化。
And using the diameter number distribution, Weibull distribution function and fitting inspection method, analysis of different regions of birch natural secondary forest diameter structure differences. 并利用径阶株数分布直方图、Weibull分布等函数及拟合检验方法,分析不同地区白桦天然次生林直径结构的差异。
The author summarized the most common expressions of approximate number in Mandarin Chinese, described its own features from three aspects: syntactic distribution, semantic expression and pragmatic function. 笔者梳理、归纳了现代汉语中一些常见的概数表达方式,从句法结构的位置和分布、语义表达的类型、以及语用功能的倾向其进行描写和解释。
To validate the method of obtaining bubbles number density presented in this paper, a wake bubbles having known size distribution function and number density is necessary to act as benchmark. 为了验证论文提出的探测方法的有效性,需要已知尺度分布和数密度的尾流气泡作为基准。
The ESTs number and tissue distribution of different classes had obvious differences, which may be reflected their distinct function during the development of the silkworm. 不同家族的GST基因ESTs数目及组织分布存在较大的差异,这些差异可能反映出了它们在家蚕的发育和在有毒物质的解毒过程中起着不同的作用。
Below the critical point of the sol-gel transition, the equilibrium free energy of sol and gel phases are given based on the intrinsic invariant property of the number faction distribution function. 此外,根据数量分布函数的内禀不变性,获得了临界点之后体系的平衡自由能。
Ischemic preconditioning can effectively reduce the degradation Cx43 mRNA of ventricular myocyte caused by ischemia-reperfusion, retain the normal number and distribution of Cx43, decrease oxidative damages to myocardium and elevate the systolic and diastolic function of myocardium. 3. 缺血预处理能有效抑制缺血再灌注导致的Cx43降解和再分布,使Cx43mRNA表达增加,维持再灌注心肌Cx43的数量和正常分布,减轻氧化应激损伤,提高左室收缩和舒张功能水平。
With the development of market economy, demand for cigarettes is showing the characteristics: more variety, small batch. The number of dealers and the type& quantity of cigarette distribution and have increased dramatically, so sorting is the core function in Distribution Center. 随着市场经济的发展,卷烟需求向多品种、小批量方向发展,配送卷烟的种类、数量和经销商数量都急剧增加,使得分拣成为卷烟配送中心的核心职能。