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On study of technology adoption timing and innovation diffusion, we get the firm's optimal threshold of technology adoption under the uncertainties about both the time of the arrival and efficiency of improvement of technologies, and give the relevant cumulative probability distribution function regarding adopting technology timing.

在采纳时机及创新扩散研究方面,在新技术的到达时间和提高效率都不确定的情况下,得到了企业最优的技术采纳的投资门槛值,并给出了企业采用时机的累积概率分布函数。

Compared with the performance of the IEEE 802.16d standard, the IPR method achieves better Complementary Cumulative Distribution Function performance without BER performance degradation almost.

与IEEE 802.16d标准中峰均比性能相比,本文提出的方法能在几乎不损失系统BER性能的情况下,获得良好的互补累积分布函数性能。

According to corrosion damage distribution law, cumulative distribution law of corrosion damage is conducted by four membership functions of fuzzy equivalent corrosion damage.

结合腐蚀损伤的分布规律,选用了4种形式的模糊等效腐蚀损伤的隶属函数来表示腐蚀损伤的累积分布规律。

OBJECTIVE: Study the fitting about S model dose-effect curve with the accumulation normal distribution function.

目的:研究S型剂量效应曲线的累积正态分布函数拟合。

METHODS: Construct proper accumulation normal distribution function form and fit with our experimental data, then compare with the common 4-parameter equation fitting.

构建累积正态分布函数的适当表达形式,对作者实验室所获得的实例数据进行拟合,同时与常用的四参数方程拟合进行比较。

METHODS Construct proper accumulation normal distribution function form and fit with our experimental data,then compare with the common 4-parameter equation fitting.

方法构建累积正态分布函数的适当表达形式,对实验所得数据进行拟合,同时与常用的四参数方程拟合进行比较。

Especially, the Hill coefficient is considered not any physiological meanings in the mathematics model usually used in fitting pharmacodynamics S dose-effect curve, but the analogous parameter in the accumulation normal distribution function has definite physiological meanings, and indicate the relationship between pharmacology and pharmacodynamics.

特别地,在常用于药效学S型剂量效应曲线拟合的数学模型中,其Hill系数被认为没有任何生理学含义,而累积正态分布函数中的相应参数却有明确的生理学含义,从数学上体现了药理与药效的内在联系。

A new method of point estimation of weibull distribution with two parameters is presented by means of methods in grey system theory.

本文利用灰色系统理论中的方法,提出了一种新的两参数威布尔分布的点估值方法,该方法使用累加生成技术,对累积失效率函数的原始试验数据进行处理,建立了估值公式。

For the singular spectrum analysis of time series, a method of constructing covariance matrix by using forth order cumulant is proposed. The method could restrain the Gaossian noise and symmetrical distributed noise mixed with chaotic signals.

对于时间序列的高阶奇异谱分析,提出了一种利用四阶累积量函数构造协方差矩阵的方法,该方法从理论上能有效地抑制叠加在混沌信号中的高斯噪声和对称分布噪声对重构结果的影响。

An equal cross-section blade was investigated and a finite element model was built parametrically. Geometrical parameters (such as length, width and thickness), material parameters (such as young's modulus and density) and speed of blade were considered as input random variables while the static frequencies and dynamic frequencies were output random variables. Combining the finite element method, response surface method and Monte Carlo method, the statistical properties and cumulative distribution functions of static frequencies and dynamic frequencies were obtained. Probability sensitivities analysis, which combined the slope of the gradient and the width of the scatter range of the random input variables, was applied to quantitatively evaluate the sensitivities of static frequencies and dynamic frequencies with respect to the random variables. The Scatter plots of structural responses with respect to the random input variables were illustrated how to adjust the values of the static frequencies and dynamic frequencies by changing input random variables.

文中以某试验台用汽轮机等直叶片为研究对象,考虑几何参数、材料参数和转速的随机性,通过有限元参数化建模,将确定性有限元方法、响应面方法和Monte-Carlo模拟法相结合,从而获得了叶片静频、动频的统计特性和累积分布函数;同时考虑随机变量的梯度和离散范围对静、动频的影响,通过概率敏感性分析,定量地判断出叶片静、动频对随机输入变量的敏感性;通过绘制叶片静、动频与输入变量的散点图,定量地分析了如何改变随机变量以调整静、动频率的方法。

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Chapter Three: Type classification of DE structure in Sino-Tibetan languages.

第三章汉藏语&的&字结构的类型划分。