自回归过程

Stationary and nonstationary processes, including ARIMA processes. Estimation of process mean and autocovariance function. Fitting ARIMA models to data. Statistical tests for white noise. Forecasting. State space models and the Kalman filter. Robust time series analysis. Regression analysis with correlated errors. Statistical properties of long memory processes.

静态和非静态过程(包括 ARIMA 过程)，均值和时间序列分析：自协方差估计，用 ARIMA 模型拟和数据，白噪声序列的统计检验，预报，状态空间模型和 Kalman 过滤，时间序列分析的稳健性，残差具有相关性的回归分析。

In modelling a nonparametric autoregressive model, homoscedasticity is usually assumed.

在非参数自回归模型的建模过程中，通常假定方差为常数。

The first is a probabilistic model; its output process has the same one-dimensional distribution as input process and has correlation structure as normal AR and MA model; its speed is quite high; its hardware implementation is quite simple.

法一是一个概率模型；其输入输出序列的一维概率分布相同，输出序列的相关函数类似通常的自回归和滑动平均过程，输出功率谱形状较为单一；其随机数输出速度较高；其硬件实现简单。

The influence of impeller type, baffle configuration and gas sparger on critical suspension speed of floating particle s in an agitated vessel was investigated.

在釜径 386 mm的搅拌釜内，考察了搅拌桨型、挡板和气体分布器等对自浮颗粒三相搅拌混合的临界搅拌转速的影响，并回归了实用的关联式，这对工业过程的设计和放大具有一定的指导意义

The first one focuses upon the fundamental theory and methods of system identification, including the basic concepts of system description and identification,review of matrix theory, stochastic process and pulse response of linear systems; the first principle models for lumped and distributed parameter systems; modeling of bioreactions; auto regressive moving average model; weighted least square and regressive weighted least square for parameter estimation of ARMA model; Runge-Kutta and Simplex methods; an example of BPNN application; as well as Kalman Filter.

第一部分包括知识驱动建模、数据驱动建模、参数估计和状态估计的基础理论和方法。具体为：(1)系统辨识和系统描述的基本概念，包括矩阵论、随机过程、线性系统的脉冲响应函数等基础知识回顾；(2)基于动态物料和能量衡算的集总参数、分布参数对象的知识驱动建模方法；(3)生物反应系统的建模方法；(4)自回归移动平均模型；(5) ARMAX模型参数的加权最小二乘参数估计一次性算法和递推算法，相应的统计性质；(6)龙格库塔法和单纯形法；BP神经网络应用实例；(7)卡尔曼滤波器，及其与加权最小二乘参数估计递推算法的对比。

In this paper, the generator model of constant transient voltage and the invariableness impedance model was used, and the saliency of generator is included; through the analysis of the characteristic of the network equation calculation in the transient stability analysis, a new node ordering algorithm is proposed. Better initial value can accelerate the convergence rate of the networking equations, reduce the number of iterations, thus to cut down the amount of calculating time.

本文首先建立了适合于暂态稳定分析的简单模型，其中发电机采用E_q恒定模型，考虑了发电机的暂态凸极效应，负荷采用恒定阻抗模型；研究了电力系统的暂态稳定分析方法，指出目前数值积分暂态稳定计算方法中存在的不足，主要是网络方程的求解速度过慢；分析了暂态稳定计算中网络方程的特点，将稀疏技术应用于网络方程的求解，提出了一种新的节点编号方法——最小度最小有源节点道路集算法，减少了网络方程的计算量；在进行交替迭代求解时，将预测算法应用于每一积分步网络方程功角和电压的初值估计当中，应用自回归算法和广义延拓算法，期望给出一个更有效的电压和功角初值方案，来加快方程的收敛过程，减少方程迭代的次数，以提高计算速度。

Through his continuous confrontations with the whiteness of the canvas, with an "emptiness" that - more or less - terrifies us all, Zhu Bing re-examines his life, which is full of "memories that chain dreams"(as in the lyrics of "Volver"- a beautiful song by the Argentinian songwriter Carlos Gardel) and which influence the artist's present life in sometimes pressing terms, while at other times tinging it with a yearning nostalgia.

有时候，艺术家会有一个明确的方向，迅速完成整个过程；但有时候，这个过程会漫长而复杂，艺术家则会疑惑重重，不断改变主意。通过长期直面白色的画布，面对这种我们都觉得有些害怕的&空白&，朱兵重新审视着自己充满&拴住梦想的回忆&的生活。（引自阿根廷作曲家卡洛斯·加德尔Carlos Gardel的杰作《回归Volver》）。这些回忆时而会有力的左右艺术家现在的生活，时而则会让他怀旧而伤怀。

To solve the problem of modeling temperature control in the fermentation process , a neural network nonlinear

针对生物发酵过程中温度控制难以建模的问题，基于非线性自回归滑动平均模型，设计了

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失