偏斜度

通过理论推导，分析并得到了一种新的基于IFFT和时域随机化的非高斯随机过程模拟算法，能够方便快捷地模拟具有指定功率谱密度、偏斜度和峭度值的平稳非高斯信号。

Through theoretical derivation , a new algorithm based on IFFT and time domain randomization for the simulation of non-gaussian random processes with specified PSD , skewness and kurtosis was proposed .

用Hanggi分解因子来近似有色倍增噪声，通过福克&普朗克方程求出了激光强度的平均值、方差和偏斜度的解析解。

Analytic solutions of the mean , variance and skewness of the laser intensity are calculated through a Fokker-Planck equation .

3种生境中匍匐茎节间长度分布偏斜度（skewness）的大小分别为：林缘旷地>林缘>林下。

The skewness in distribution of stolon internode length was in the order of open land of forest edge > forest edge > forest understory ;

为了优化CD-Tree结构和指导对数据的划分，提出了基于划分的数据偏斜度（skewofdata，简称SOD）概念。

Moreover , to guide partition and to optimize the structure of CD-Tree , the concept of SOD ( skew of data ) is proposed to measure the degree of data skew .

然后在检索匹配时，用各尺度的标准差和偏斜度进行递进筛选，再用LL子带的HSV颜色直方图计算图像之间的相似性距离，进一步对检索结果求精。

When matched retrieval is conducted , progressive filtration is processed by using multi-scale moment , and then HSV bar graph of the LL sub-band is used to calculate the similarity distance between the images for further refining the retrieval result .

机织织物及针织物的弯曲度及偏斜度试验法

Test method for bow and skewness of woven and knitted fabrics

更高阶矩的研究表明它们的陡峭度与偏斜度之间存在平方关系。

There are square relationships between their kurtosis and skewness .

指定功率谱密度、偏斜度和峭度值下的非高斯随机过程数字模拟

Numerically Simulating Non-gaussian Random Processes with Specified PSD , Skewness and Kurtosis

不幸的是，一旦把偏斜度和峰度考虑进去，事实就并非如此了。

Unfortunately , when skewness and kurtosis are taken into account , this need not be the case .

当前的对冲基金热，很好地说明了忽视偏斜度和峰度会有多么危险。

The current hype over hedge funds provides a good example of how dangerous it can be to ignore skewness and kurtosis .

通过分析，本研究结论如下：移动电话通信网络与飞信网络的消费者度分布都是偏斜度分布。

Through the analysis we can get some following conclusions . The MCN and FETION network all have skewed degree distributions with fat tails .

少数民族文化的价值、信仰和审美等因素可能会改变中原民族文化原来存在的发展轨迹和状态，使之发现某种‘有偏斜度的超越’。

The values , beliefs and aesthetic factors of minority cultural may change the central plains ' original develop track and state , leading to certain ' biased beyond ' .

在投资组合中运用这些策略确实能够降低标准差，但同时也会削弱偏斜度，也就是说会增加出现负面意外结果的风险。

Adding these strategies to a portfolio will reduce standard deviation but it will at the same time reduce skewness , that is increase the risk of a nasty surprise .

为此，作者将架空孔隙面积与粒径偏斜度之和定义为表征黄土震陷性大小的微结构特征参数。

The sum of the area of trellis pores and the declination of particle distribution are defined as characteristic parameters of microstructure related to seismic subsidence of loess by authors .

林缘旷地与林缘和林下生境在分枝角度、分株种群高度和分株种群根冠比差异显著，而且林缘旷地生境中分枝角度分布偏斜度最小。

And the branching angle , ramet population height , and root / shoot of ramet population were significant greater in open land of forest edge than in forest edge and forest understory .

本文分析了含有高斯白噪声的随机过程，通过福克-普朗克方程，导出了求解首次通过时间分布的平均值、方差和偏斜度解析解的一般公式。

The stochastic process containing Gaussian white noise is analysed . General formulas for obtaining analytic expressions of the mean , variance and skewness of the first-passage-time distributions are derived through a Fokker-Planck equation .

首先用小波变换对图像进行多尺度分解，提取其各子带的前三阶矩（标准差、偏斜度）和最低频段（LL子带）的小波变换值作为特征值。

The image is decomposed first with wavelet transform to extract the moment ( standard and skewness ) of each sub-band and the lowest frequency ( LL sub-band ) as characteristic value of wavelet transform .

然后，根据以标准差为横坐标、以偏斜度为纵坐标的二维坐标系中的轨迹的特点选择神经网络的训练样本与检验样本。

And then , choose the training and testing samples of the neural network according to the trochoid trends in the two dimensional coordinate system , whose x-coordinate and y-coordinate are STD and skewness respectively .

研究墩身偏斜度、施工荷载形式以及桥墩系梁刚度等参数对悬臂施工阶段大跨径预应力混凝土刚构桥稳定性的影响效应。

The effects of the initial pier deflection , the construction load type and the rigidity of tied-beam on the stability of long-span prestressed concrete rigid-frame bridge during cantilever construction phase are discussed in detail .

广义说来，偏斜度衡量的是出现负面意外结果（负偏斜度）或惊喜意外结果（正偏斜度）的相对概率，而峰度衡量的是出现极端结果（或正面或负面）的概率。

Broadly speaking , skewness measures whether there is a relatively high probability of a nasty ( negative skewness ) or pleasant ( positive skewness ) surprise , while kurtosis measures the probability of an extreme outcome , either positive or negative .

另外一些对冲基金策略（例如有管理的期货合约）则会给投资组合带来完全相反的特性：同样会降低标准差，但趋向于增加偏斜度，或者说出现正面意外结果的机会。

Other hedge fund strategies ( such as global macro and managed futures , for example ) have exactly the opposite characteristics . These strategies also reduce standard deviation but tend to increase skewness , or the potential for a pleasant surprise .

在图像分割的基础上，对气泡分割区域像素进行标定，引入样本统计分布的概念，提取了气泡平均尺寸、方差、偏斜度及陡峭度等统计特征。

On the basis of image segmentation , pixels in bubble segmentation region were calibrated . At the meantime , concept of sample distribution statistics was introduced . Moreover , some statistical characteristics , such as the average size of bubbles , variance , skewness and abruptness were extracted .