查询词典 empirical

The nuclear of the method is the newly developed HHT for nonstationary and nonlinear time series analysis, which consists of the Empirical Mode Decomposition and Hilbert Spectral Analysis.

该方法对桥梁结构健康性的最终判断依据是基于数据的非线性特征、自由振动和强迫振动的频率对比、桥梁对轻荷载及重荷载的响应。

On the problem of model parameter determination, the singularity distribution method is used to derive the expressions for numerically calculating the added mass arised from vibration of the structure under three-dimensional case; The aero-dynamic damping ratio is identified from the testing data based on the methods of empirical mode decomposition, improved random decrement and Hilbert transformation; The reduced-order spectral representation method is also deduced in this chapter based on the technique of proper orthogonal decomposition.

在模型的参数计算上，采用奇点配置法推导了三维情形下结构振动诱导流场附加质量的数值计算方法；联合采用经验模态分解、改进的随机减量法及Hilbert变换对索穹顶结构的气动阻尼进行了识别分析；推导了基于本征正交分解的降阶谱解法。

Aiming at the disadvantage of conventional BP neural network, such as selecting parameter values by the empirical method, slow convergence speed and easy trap into local minimum points, this paper designs an improved BP neural network system. In order to improve the network convergence rate and reduce the training error, this paper optimizes the initial connecting weight value of neural network by the use of ant colony algorithm and trains artificial neural network by Levenberg-Marquardt algorithm.

针对常规BP神经网络参数的经验式取值方法以及收敛速度慢，容易陷入局部最小点等缺陷，设计了一种改进的神经网络系统，利用蚁群算法优化神经网络连接权初值，并采用LM算法对人工神经网络进行训练，提高了网络的收敛速度，降低了训练误差。

Finally, on the basis of theoretical and empirical analysis, the dissertation elaborates the particularity of spillover effect of U.S.

最后，在理论和实证分析的基础上，阐述美国对华直接投资外溢效应的特殊性。

ABSTRACT The production of tube spinning involvs lots of empirical knowledges and now is more a art than a science.

旋压技术近年来虽然有了很大发展，但仍有许多问题，需要深入研究和探讨。

Hence this study purposed on the relationship between strike prices and premium through empirical research and try to find a strategy of arbitrage on spread of market anomaly.

所以本文冀希将实务研究导入选择权交易中的各个履约价和其相关权利金间是否存在一必然关系性来做为研究目的，也冀希从研究中找寻一可行性之套利策略以探求市场异质性之价格误谬进行套利目的。

The usual methods to calculate pile shaft resistance are static method; in situ-testing; empirical method etc.

通常计算桩侧阻力的方法有静力计算法、原位测试法、经验估算方法等。

For an empirical second-order response surface model, the objective is to determine the location, response and nature of the stationary point.

对一个二次反应曲面模式而言，其目的是决定稳定点的位置、反应值，以及本质为何(最大值、最小值或马鞍点)。

Based on the distillation data of raw material, which are usually in the form of empirical charts and formulas, a simple stationary state mathematical model was developed for atmospheric distillation tower.

3将软件设计中的模块化技术应用于构造复杂工业过程系统仿真模型，形成了一种以模块间的调用关系和偶合关系的定量化描述为核心的模块化模型设计技术。

Regarding to the empirical research of the impact of exchange rate variability to international trade of Guangdong province,this paper applied ARDL model(one kind of dynamic econometrics model for stationary time series) to do the research,and then applied Granger causality test to analyse the relationships between different variables.

在人民币汇率波动性对广东省进出口贸易影响的实证研究中，采用动态计量经济学模型中的自回归分布滞后模型来进行研究并用Granger因果检验验证不同变量的关系。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。