查询词典 likelihood function

The paper puts forward stock prediction pattern based on BP Neural Network, depending on Neural Networks approachability to non-linear function. Compared with the prediction method of Time Order, one of the traditional prediction methods, BP algorithm is verified to be feasible and effective on stock prediction.

本文借助神经网络对非线性函数的逼近能力，提出基于BP神经网络的股票价格预测模型，通过对比传统的时间序列预测方法，证实BP神经网络算法用于股票预测的可行性及有效性。

This method was applied to the dimensionality reduction of multidimensional time series via projection pursuit technique for fuzzy clustering. According to the results of the classification and the extraction of fuzzy rules through best value projection, three types of fuzzy membership function were generated using trapezoid distribution method. Then the sample's credit level was determined according to the fuzzy approximability in computation.

该方法利用投影寻踪技术对多维时间序列数据进行降维处理并进行模糊分类；根据分类结果和最佳投影值提取模糊规则，采用梯形分布法生成三个模糊隶属函数；最后根据计算模糊贴近度确定样本的信用级别。

That do not require derivative information and approximate the objective function without recourse to Taylor expansions.

虽然是有益的，我们觉得基于泰勒展式的分类法脱离了基本的问题。正如[27]，我们更强调逼近的构建，而不是他们构建的机制。

In this dissertation, the following critical theoretical problems on local La-grangian numerical differentiation are studied: explicit formulas, local estimate for the remainder, and the highest order of approximation in the case that the values of the function at these interpolation nodes have perturbationsLagrangian numerical differentiation is a method that the Lagrange interpolation polynomialis differentiated to approximate the derivative, where Tn ={t_0,t_1,......

本文主要研究有关局部Lagrange数值微分法的一些关键性的理论问题：公式的显式表示，余项的渐近估计，以及在插值数据有扰动的情况下，局部Lagrange数值微分法的最大逼近阶。

Then using classical fractional differential G-L definition deduces fractional order differential difference function and constructs an approximate fractional order differential Tiansi module.

然后由经典的分数阶微分定义出发，推导出了分数阶差分方程，构建了近似的分数阶Tiansi微分模板。

According to results of analysis, An approximate method calculating transfer function by site dynamic characteristics is presented.

研究了抗震规范中的为高层建筑结构作时程分析确定地震动的方法并指出不足，提出了用近似场地传递函数来确定地震动时程的实用方法。

It is generally performed to improve function, but may also be done to approximate a normal appearance.

通常这种手术目的是改善器官功能，但或许也是为了回复正常的外观。

The approximation calculus formula of reliable on FCT was calculated by using abate probability being q Bernoulli test sequence, probability formula and property of increasing convex function.

应用概率理论推导出钻井油气层测试器系统的可靠度精确计算公式。

The parameters A, B, C and D define the shape of the curve for the function and the values for a fit to theArcSin approximation with minimal error must be found.

参数 A， B， C 和 D 决定了函数曲线的形状。在近似的 ArcSin 中，在最小误差允许范围内，肯定存在这些值。

Finally, the proposed method is applied to the problem of nonlinear function approximation.

最后将所提出的方法用于解决非线性函数的逼近问题。

A carrier gas such as nitrogen is directed through line 20 and valve 22 to connect with line 26 and mix with the gas sample.

如氮气之类的载体通过管线20和阀22引入，与管线26相通，与气体样品混合。

But for the most part, knaves and parasites had the command of his fortune

然而支配他的家产的大多是恶棍和寄生虫。