CST对一种用于中型无人机 433MHz 通信的宽带共形贴片天线 CST太赫兹雷达单个沟槽结构成像仿真与特性分析 CST基于超构表面的边值协同波束赋形
μ等于Beta分布的均值，而当均值已知情况下，其方差由φ决定，因此φ也被称为分散度参数（dispersion par...
相信接触过Dispersion Diagram色散图的朋友一开始都会有同样的疑问,色散横坐标到底是什么? 上网一搜Dispersion Diagram,能见到wave number, wave vector, propagation constant, phase constant, phase, phase advance, phase shift per cell,β,β(rad/m),β*d,βp,βL/2π, k,kz,还有-π~π,0-180-180-0,...
Beta多样性具有时空尺度和分类尺度依赖性, 一般随分析粒度(grain)的增加而降低。虽然有些研究表明beta多样性随纬度增加而降低, 但学者们并没有达成共识。山区和生物地理区的交界处beta多样性都比较高, 因而需要在这些地区增加保护区的面积或者数量以囊括物 3、种变化梯度。对时间尺度上beta多样性的研究表明, 气候...
xA(s)cos[(s)] s(s)2 k 和 k2[(s)]'则横向振荡相位 1(s)s ' s2 s1 dss 第一个测量方法：改变工作点ν •1.测量原理•3.测量实例•5.实验注意事项•2.测量方法•4.误差分析 第一...
(1) Resemblance; (2) Gradient length in ordination space; (3) Slope of distance decay relationship; (4) Sum of squares of species matrix; (5) Multivariate dispersion in ordination space; (6) Multiplicative partitioning; (7) Additive partitioning and (8) Slope of species area curve. 图3 4...
▲Figure 2. Interfacial component and stability. (a) Cross-section SEM and EDX mapping images of UW-Na/Beta-Al2O3pellet. (b-c) line-scan SEM image and element dispersion profile. Digital photographs of the Na ...
XRD,XPS,chemical adsorption,and probe molecule infrared spectroscopy were employed to analyze the form,chemical environment,and size of cobalt species in the catalyst.The results indicate that La promotes the dispersion of cobalt species and enhances the interaction between cobalt species and the ...
过数值模拟研究Score检验统计量的检验功效问题;实例分析证明Beta-Binomial回归模型的有用性。 关键词:比例数据;Beta-Binomia1分布;偏大离差;相关性 中图分类号:C81:O212 文献标志码:A 文章编号:1007-3116(2016)03-0009-05 一 、引言 在许多生物学和医学试验或某项政策的社会满 ...
Figure 2. Interfacial component and stability. (a) Cross-section SEM and EDX mapping images of UW-Na/Beta-Al2O3pellet. (b-c) line-scan SEM image and element dispersion profile. Digital photographs of the Na metal on top of (d) Na/Beta-Al2O3pellet and (e)UW-Na/Beta-Al2O3before...