查询词典 pascal distribution

In this paper, we improve the EWMA Futures Margin based on normal distribution assumption and propose a new model of futures margin based on skewed EWMA estimator which based on the asymmetric laplace distribution that is sound to capture leptokurtosis and fat-tail.

本文是对建立在正态分布假设的EWMA期货保证金模型的改进。文中引入基于非对称Laplace分布发展起来的有偏型EWMA方法，建立了新的期货交易保证金模型，较好地反映了期货合约价格序列有偏、厚尾的现象。

Based on the composite bounded reservoir model with two porous media, the Laplace solution of dimensionless pressure distribution under inner boundary condition (considering the wellbore storage and the skin effect) has been studied, and through analyzing the structures and interrelations of Laplace solution, the correlations with usual composite, two porous media and homogeneous reservoir pressure distribution have been found.

针对双孔介质复合封闭储层模型，研究了两种内边界条件(是否考虑井筒储存和表皮效应)下的变流率问题的无因次内、外区储层压力分布的Laplace空间解，在深入剖析了解的结构和相互联系的基础上，找出了它与常见的复合、双孔、均质储层压力分布间的相互关系。

The nonlinearity and discrete gradient inherited in CAViaR model is a conundrum for parameter estimation. We take the asymmetric Laplace distribution with scale parameter as the error process; indicate the variance has a minimum positive value when the scale parameter is a constant, conflicting with the distribution of real financial data. Further we estimate the parameters of indirect TARCH-CAViaR model base on Bayesian framework and Markov chain Monte Carlo method. The optimal scale parameter can also be obtained by Markov chain Monte Carlo method.

CAViaR一般模型中递归分位回归方程的非线性和非连续可微性是参数估计的一个难题，基于含有尺度参数的不对称拉普拉斯分布作为误差过程，指出将尺度参数固定为常数会导致不对称拉普拉斯分布随机变量的方差存在最小正值的限制，与实际金融数据分布不符；进而提出采用贝叶斯分析和马尔科夫链蒙特卡罗模拟方法，估计间接TARCH-CAViaR模型的参数，并可获得尺度参数的合理估计。

According to the result, the confidence region of unknown parameters in single-index models is constructed. Finally, we consider the test of correlation and heterogeneity for hierarchical nonlinear mixed-effects models. According to Laplace approximation expansion of integrated log-quasilikelihood, a class of score test statistics is proposed. Under some very mild conditions, we prove the asymptotic distribution of the test statistics is a standard X~2-distribution. Through a Monte Carlo simulation study, the finite sample performance is examined.

最后，我们研究的第四个问题是分层非线性随机混合效应模型的相关性与异方差性检验问题，依据对数拟积分似然的Laplace近似展开提出了检验统计量，在一些正则条件下，得到了检验统计量的渐近分布是一个标准的χ~2-(来源：d7d7A65BC论文网www.abclunwen.com)分布，通过Monte Carlo模拟研究了其小样本的表现，实例验证了其实际应用。

Regarded taxi as the source of floating car data,aimed at the disequilibrium of distribution of FCD in road network,two indexes named detecting intensity and detecting rate were designed to analyze the distribution characteristics of FCD in different areas and traffic corridors by large sample analysis.

以出租车作为浮动车数据采集源，针对浮动车数据路网分布的不均衡性，提出覆盖强度和覆盖率2个指标，通过大量样本分析浮动车数据路网分布的时变特征，以及在不同区域、不同通道上的分布特征。

Aims at the deficiency of foundation opposite force distribution hypothesis of existed calculated model, the article carries through the indoor model experiment of prestressed anchor-cable and lattice beam, and analyses the actual distribution situation of the soil stress at the bottom of the lattice beam.

本文针对现有计算模型对格梁底部地基反力的分布假设的不足，进行了预应力锚索格构梁的室内模型试验，并对格梁底部土体应力的实际分布情况进行了分析。

So the main study contents of this thesis are as follows: the load distribution pattern along the length beam and the cross beam in the place of node、 the appropriate matching rigidity of the length and cross beams in the action of same anchorage force and the affection pattern discuss on sloping surfaces dip angle、 beam rigidity 、 anchor-rope angle as well as the position of load which affect the load distribution ratio on length and cross beams. In the end it brings forward lattice beam internal force calculated method on the basis of double parameter groundsill model.

鉴于此，本文主要的研究内容是格构梁节点处荷载沿纵横梁的分配规律、同一锚固力作用下纵横梁合理的匹配刚度以及对格构梁纵横梁荷载分配比值可能存在影响的坡面倾角、梁刚度、锚索夹角、加载位置等因素的影响规律探讨，最后提出基于双参数地基模型的格构梁内力计算方法。

The children's mean score in rhythm test is 62.73; the standard deviation is 7.68; the frequency distribution showed the right skewness and the leptokurtic distribution, indicated that the number of children who scored higher than mean score were more than that who scored lower.

一、全体儿童在节奏测验的平均分数为62.73，标准差为7.68，分数呈现负偏态及高狭峰的分配，即分数以高於平均数的人较多。

The geographical distribution of historical characters in the four dynasties in Southern Dynasty lias features as follows: although the number of the provinces of distribution is relatively approximate, the number of the characters in each province is remarkably imbalanced

南朝四代历史人物的地域分布具有以下特点：虽然分布省区的数量比较接近，但每省区拥有的人物数量却表现出极大的不均衡，更为突出的表现是：各朝的人数分布呈现出明显的高聚集性特征

In this paper,the fix time censored test of Weibull distribution is studied and the limit distribution of total test time is obtained.

该文研究了Weibull分布大样本定时截尾试验，给出了总试验时间的极限分布。

My father is over 60 years old, and he lifts weights every day.

我爸爸六十多岁了，他每天都练习举重。

Then in a serious tone she declared:"It doesn't pay, dear boy, to look like a ninny with one's wife the first night."

两眼湿润了，她把身子蜷得很小，这样似乎可以更好地闻闻自己。