回归系数

NMath Stats contains a data table class with functions for computing descriptive statistics, such as mean, variance, standard deviation, percentile, median, quartiles, geometric mean, harmonic mean, RMS, kurtosis, skewness, and many more; PDF, CDF, inverse CDF, and random variable moments for a variety of probability distributions, including normal, Poisson, chi-square, gamma, beta, Student's t, F, binomial, and negative binomial; Combinatorial functions, such as factorial, log factorial, binomial coefficient, and log binomial; Multiple linear regression; Basic hypothesis tests, such as z-test, t-test, and F-test, with calculation of p-values, critical values, and confidence intervals; One-way and two-way analysis of variance and analysis of variance with repeated measures; Multivariate statistical analyses, including principal component analysis and hierarchical cluster analysis.

nmath统计包含一个数据表的阶层与职能计算描述性统计，如平均，方差，标准差，百分位，中位数， 25 ％，几何平均数，调和的意思是，有效值，峭度，偏度，还有更多的； PDF格式，民防部队，逆民防部队，并随机变量矩的各种概率分布，包括正常，泊松，卡方检定，伽玛，测试版，学生的吨，男，二项式，并负二项分布；组合的功能，例如阶乘，日志阶乘，二项式系数，并登入二项式；多元线性回归；基本假设测试，如的Z测试， t检验， F检验，计算p值，临界值，和置信区间；之一，双向和双方法方差分析和方差分析与反复的措施；多元统计分析，包括主成分分析和聚类分析。

The results showed that the population density and biological rhythm of the scale insect were contrasted with the content of VB2 and the VB2 content in the two pollution districts were significantly higher than that in the cleaning district.

结果证明，污染区国槐枝条和叶片的VB2含量极显著地高于清洁区；VB2的变化与虫口密度呈正相关关系，回归式为y=1507.76x-170.56，相关系数r=0.839。

Formulas of distribution ratios of ethanol and butanol were proposed, and calculated results coincide with experimental results.

由实验数据回归出了络合剂与醇的络合比及络合萃取平衡常数，建立了醇的分配系数的关联式。

Among them, 20 patients were candidates of valve replacement and 18 PDA and pericarditis had their blood samples taken before operation,and 1,2,24 and 48 hours after closure of thorax for measurement of concentrations of CK、CK-MB and TnT,together with ECG recording. Results Of the 60 patients, concentrations of cTnT before operation were normal; 2 hours after aortic unclamping, the correlation coefficient between cTnT and aortic clamping was r = 0.873( P＜0.01), the regression analysis showed Y = 0. 019X-0. 026. Of the 20 patients, ECG showed the myocardium was ischemic; CK、CK-MB and cTnT all rose significantly, reaching the peak after closure of thorax. Of the 18 patients, the ECG and cTnT before operation and after closure of thorax were normal; except 2 patients with pericarditis.

结果 60例瓣膜手术患者术前cTnT均在正常值范围内，主动脉开放后2 h时，阻断时间和cTnT的相关系数为r=0.875(P＜0.01)，回归方程为Y=0.019X-0.026；其中20例瓣膜手术患者心脏经过阻断后，心电图有缺血性改变，周围血液中的CK、CK-MB和cTnT均有明显升高，分别在关胸后2 h达到高峰，数值分别为术前的12.6、9.2和257倍；18例行动脉导管结扎和心包剥脱术的患者术前和关胸后的心电图和血液中的cTnT均正常，CK和CK-MB除2例心包炎患者关胸后出现明显变化外，余均未见改变。

The result shows that the improved functional coefficient autoregressive model has a good capability in forecasting.

并与上海股市日收益率的自回归模型结果进行了比较，结果表明改进的函数系数模型具有很好的预测能力。

This paper makes use of functional coefficient autoregressive model modeling and forecasting daily revenue of stock market in Shanghai.

函数系数自回归模型是一类更具有适应性的模型。

Chaper 4 focuses on the application of nonparametric and semi-parametric functional coefficient regression to boston housing prices.

第五章给出了本文的最终结论，说明了非参数和半参数变系数分位数回归模型对于实际经济问题具有很好的解释能力。

At present, semiparametric model, functional coefficient model and quantile regression are key issues in the field of regression analysis, they have been applied widely in multi-variable data analysis, economics and finance.

半参数模型、变系数模型和分位数模型是当今回归分析中研究的热点问题，在实际问题尤其是在多变量数据分析、经济学、金融学中有着广泛的应用。

By a more flexible model-the combination of semiparemetric model , functional coefficient model and quantile regression.

在本文中，主要讨论了非参数和半参数变系数分位数回归模型的估计及其应用。

In this paper, we mainly discuss nonparametric and semiparametric functional coefficient quantile regressions, their estimation methods and applications.

半参数变系数分位数回归模型，在理论上其假设前提条件限制比较少，在应用上具有很好的灵活性和很广的适用空间，能够更好地解释现实经济问题。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。