查询词典 analysis of time series

The results confirm the feasibility of the algorithm in the analysis of hydrological time series.

实验结果证明算法在水文时间序列分析的可行性。

ABSTRACT Feature analysis of financial time series has already been one of the most hotspot issues in financial field.

金融时间序列特征分析一直是金融领域中最受关注的热点问题之一，利用数据挖掘技术提取金融数据中蕴藏的有用信息，解决信息爆炸和知识获取的瓶颈问。。。

We introduce the general sigma point selection framework, and give two kinds of efficient methods: a reducing the computing complexity by decreasing the number of the sigma point; b scaling the sigma points to influence the effects of the higher order moments, then improve the accuracy of the UT; c Convergence analysis of the UKF, when used as an observer for nonlinear deterministic discrete-time system, is presented. Based on the UKF that captures the posterior mean and covariance accurately to the second or third order term (in terms of Taylor series expansion) for any form of nonlinearity, sufficient conditions to ensure local asymptotic convergence are established.

论文介绍了sigma点的一般选取规则，并给出了两种有效的方法：a通过减少sigma点集合的元素的数目来减少计算复杂度，b通过增加参数来逼近泰勒展开的高阶项，从而提高UT变换的精度；c论文研究了UKF算法应用于非线性确定性离散时间系统时的收敛性问题。

Then we use R/S analysis to investigate time series of spontaneous discharge of auditory nerve.

R／S分析法是赫斯特在大量实证研究的基础上提出的一种研究分数布朗运动（目前一般称之为分维时间序列）的方法。

The soft-measuring technique is systemically described from the following aspects: auxiliary variable selection, data processing, soft-measuring model construction and model correction. Moreover, in order to solve the problem of measuring temperature of aluminum electrolytic cell, the importation electric power and blanking velocity are selected as auxiliary variable, then the temperature estimated value of the electrolytic cell is calculated. An autoregressive model with controlled item based on Modern Time Series Analysis method is established.

从辅助变量选择、数据处理、软测量模型建立和模型修正等方面系统地介绍了软测量技术；并针对铝电解槽温度高、腐蚀性强、温度难以直接测量的问题，选择电解槽的输入电功率和下料速度作为辅助变量，利用现代时间序列分析法建立了带受控项目的自回归数学模型，从而计算出电解槽的温度估计值。

The ecological water area coefficient is determined according to the analysis on the amount of water area in a long time series and comparison with the health situation of the eco-system.

应用该方法对扎龙湿地长序列水面面积数据进行了频率分析，再与湿地生态系统健康状况对照分析，确定生态水面系数，得出湿地生态环境需水量安全阈值。

The differential pressure signal of slug flow was gathered in a downward inclined pipe, and the time series of liquid slug length was obtained by utilizing the cross correlation analysis.

通过采集下倾管中活塞流的差压信号，应用互相关法分析得到液塞长度时间序列。

In this paper, a prediction model of short-time traffic flow is presented based on the chaotic time series analysis.

依据混沌时间序列分析方法，建立了短时交通流的预测模型。

This thesis is to introduce time series analysis to forecast the delivery time of the pregnant women for the decision support system of the Hospital Information System. The pregnant woman is special forecast object, because it has so much obvious biologic periodicity and some uncertain factor.

本文在现代医院信息系统的决策支持层中引入时间序列分析方法对孕妇分娩时间进行预测，但是孕妇这一特殊的预测对象自身有着非常明显的生物周期性而且具有不确定性。

Using tools from dynamical system theory, such as phase space diagrams, Frequency analysis, Poincare sections and the calculation of statistical quantity of chaos: the correlation dimension, Reni entropy, Laypunov exponent and so on, the different solutions to the Navier-Stokes equations at different values of the Reynolds number have been identified and characterized through reconstructing the phase space of velocity time series by means of time delay and dimension embeding.

通过时间延迟和维数的嵌入对速度时间序列重构相空间，利用非线性动力系统理论方法诸如相空间分析，频谱分析，Poincare映射，以及通过对混沌统计量：关联维数，Reni熵，Laypunov指数等计算，对不同雷诺数N-S方程解的特征作了分辨。

At the rear was an innovative combination transaxle with the gearbox, clutch, differential, and inboard-mounted drum brakes.

在后面是与变速箱，离合器，差的创新结合变速，和内侧安装鼓式制动器。

For more people can apprecaite and have the master work, there is reproduction painting appears in the market, the large various selection of paint,the high saturation of color plus the plentiful sfumato, to make the reproduction perfect copy and detail as original painting, so as to meet the requirment of amateurs who love art paintings,they do not need to pay high price to get classical paintings.

颜料色域广，色彩饱和度高，色彩层次丰富，图像色彩还原真实，能完美的复制原作，满足艺术爱好者欣赏，艺术爱好者们不用支付昂贵的价格就能拥有经典油画。