查询词典 t distribution

In particular, a multivariate t distribution is attained to characterize the prediction information corresponding to HMM mean vector and precision matrix.

在实作上我们采用一个多变量的t 分布来代表所选出隐藏式马可夫模型所对应平均向量及预测矩阵的预估资讯之特性。

Considering the fat-tail phenomenon that may exist in practical data, we have also studied the PTLE for the multi-t distribution model based on the three large sample tests above. Performances of the estimators according to the quadratic bias and mean square error are similarly compared in detail.

考虑到实际数据可能存在的厚尾情况，本文研究了文献中讨论颇多的多元t分布模型的基于大样本检验的等式约束预检验Liu估计，并同样在平方偏差和均方误差两个准则下对其优良性进行了详细比较。

Second, the t distribution is widely used in applied statistics for robust statistical inferences.

第二，多元t分布在稳健统计推断等应用统计方面使用非常广泛。

Further, considered the considerable uncertainty of current sample variance, a reliability estimation method based on t-distribution theory and empirical logarithmic standard deviation is proposed.

进一步考虑到工程实际中当次可靠性试验的样本方差具有较大不确定性的因素，提出了基于对数标准差经验值的t分布可靠性评估方法。

We first check the VaR of the automobile physical damage insurance via P-P Plot and Q-Q Plot, we compare normal, log- normal, index and student t distribution to discover the amount of losing money and probability above were unable to mix rightly.

经由P-P Plot 及Q-Q Plot来检定汽车车体险损失的风险值，我们同时比较了常态、对数常态、指数分配及t分配等四种分配函数。

If we wish to avoid the inaccuracies caused by the size of the sample , we need to use the T distribution.

为了避免因样本容量大小而造成的误差，我们必须使用T分布。

Because the t distribution approaches the normal distribution for large df, we can also say that

因为自由度df很大的 t分布接近于正态分布，我们也

According to the theory of probability and theory of errors, an improved statistical analysis method based on the t-distribution, which can be used to calculate the radius of the Youden circle, is presented by the authors.

本文对流量标准装置比对试验中目前普遍使用的尤登分析法进行了详细的讨论，并在此基础上，根据概率论与误差理论，提出了一种基于t分布计算尤登圆半径的新方法。

In this paper, we contribute an evolutionary heterogeneous beliefs model byusing t distribution to replace traditional standard normal to describe fundamen-tal price process and adding risk-adjusted market fraction function in classicaltwo types traders scheme. And then we utilizedifference equation stability and bifurcation theory and numerical simulation tostudy the system. It is found that the system has some styled facts (high kurto-sis、fat tali and long memory) of the actual financial market, and this indicatesthat the simulation model can reflect well the true financial market.

本文通过引入t分布代替原有的正态分布描述基础价格过程，引入经风险调整的投资者市场分数维函数取代原有的无风险调整的市场分数维函数，在经典的两类投资者(自主投资者和图表分析者)模拟模型框架下，建立了新的异质预期资产定价模型，利用差分方程稳定性和分支理论及数值模拟的方法对该系统进行理论分析和实证研究，发现模型具有真实金融市场的程式化事实(尖峰厚尾性，长记忆性等)，模拟效果较好。

There are also trying to model and technology at the expense of stability and in order to adapt to a specific time period the proportion of heavy-tailed market data, for example, Press (1967) put forward by the students t distribution, Praetz (1972) proposed a mixture of Gaussian distribution, as well as Engle ( 1982) of the ARCH process.

也有一些模型和技术试图去以牺牲稳定性和比例以适应特定时间段内重尾的市场数据，例如 Press(1967)提出的学生 t 分布， Praetz(1972)提出的混合高斯分布，以及 Engle(1982)的 ARCH 过程。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。