二阶过程

提出了在PID条件下闭环辨识的方法，运用频域法，通过有关模和相角的关系，辨识出假定二阶过程模型的有关参数。

A method of closed-loop identification under PID and identifying parameters of proposed second-order process model through relationship of mode and phase in frequency domain method are proposed .

针对工业中常见的具有积分和时滞特性的二阶过程对象，根据鲁棒控制H∞性能指标提出了一种解析设计PID控制器的新方法，并给出了闭环控制系统保证内稳定的充分必要条件。

A new analytical design method of PID controller was proposed for typical second-order integrating processes with time delay in industry according to the robust control H _ ∞ performance specification . And the sufficient and necessary conditions for holding internal stability of the closed-loop control system were provided .

大时滞二阶过程内模预测控制系统设计

IMPC Control Systems Design for Second Order plus Large Dead Time Processes

二阶矩过程为n阶均方可导的一个充要条件

A Necessary and Sufficient Condition of n-Order Mean Square Differentiability for a Second Moment Stochastic Process

针对二阶时滞过程模型，采用直接综合方法设计了PID控制器的三个参数。

Aiming at second order delayed process model , a new PID controller tuning parameters method based on direct synthesis approach is proposed in the paper .

本文讨论了二阶矩过程的均方R-S积分的存在定理、运算性质及其它性质（数字特征、中值定理、积分不等式）；

This paper discusses the existence law of quadratic mean R-S integral in the process of 2-th moment , operation property as well as other properties ( figure characteristics , mid-value law , integral inequality ) .

结合微结构设计的基本理论和准相位匹配原理，我们在实验上首次实现了非线性光子晶体波导中基于级联二阶非线性过程的Cerenkov三倍频效应，并对其进行了系统的理论分析。

Based on the theory of micro-structure design and qui-phase-matching ( QPM ), we realized Cerenkov third harmonic generation in the experiment via two cascaded second-order nonlinear processes for the first time , using the APE nonlinear photonic crystal waveguide .

讨论了二阶矩过程的均方R-S积分的存在性问题，同时与普通R-S积分进行了比较，搞清了两种积分的异同，建立了均方R-S积分的逻辑基础。

The existence law of quadratic mean R-S integral in the process of 2-th moment is discussed , the differences between two integrals are compared and explained . Finally the logical foundation of R-S quadratic mean integral is set up .

活塞二阶运动过程及活塞刮擦力分析

Analytical study of piston secondary motion and the piston scraping force

关于均方连续的二阶矩过程族的讨论

Discussion on two-order Moment Process Family with Continuous Mean square

光子晶体中二阶非线性过程产生三次谐波的研究

Study on the third harmonic generation induced by the second-order cascading in nonlinear photonic crystal

二阶矩过程黎曼均方可积的充要条件

Sufficient and Necessary Condition for the Existence of Riemann Integral in Mean-sguare Sense of a Second-order Moment Process

一般的随机过程教材中只对一个二阶矩过程均方可导与其相关函数广义可导的等价性进行论述。

In general textbooks of stochastic process , only the equivalency between mean square differentiability of the process and generalized differentiability of the relevant function about a second moment stochastic process is expounded .

基于非共线位相匹配理论计算和分析表明，这是一个由Ⅰ类自发参量下转换和其倍频过程的级联二阶参量过程，和彩虹圆锥角辐射的级联顺序正好相反。

Theoretical calculation and analysis based on non-collinear phase matching condition show that it comes from the type-I spontaneous parametric down conversion and its second harmonic generation , having the opposite sequence to the colored conical emission rings .

本文给出了海洋浮游生态系统连续介质动力学模型方程的湍流二阶闭合过程的推导，在此基础上进行了简化，最终以8组两两联立代数方程的形式表达了生态动力学二阶相关项的关系。

The second order closure of equa tions in the dynamics model for marine plankton ecosystems was formulated and it s simple formulation that second order relative terms were expresses by eight sy stems of two algebra equations was suggested thereby .

随着研究的深入，二阶非线性过程也从最早的二次谐波产生扩展到混频产生，包括和频产生、三次谐波产生、光整流过程、差频产生、光学参量放大和光学参量振荡等等。

With more understanding of this phenomenon , the second-order nonlinearity has also been expanded from the earliest SHG to the mix-frequency generation , like optical third-harmonic generation , optical sum-frequency generation , optical difference-frequency generation , optical rectification , optical parametric amplification and oscillation .

本文以电路分析课程中的“二阶电路过渡过程实验”为例，介绍了Excel软件的函数、图表功能在作直线方程参数估计中的用法。

This essay takes the two-order circuit transitional process experiment in the course of Circuit Analysis as an example to demonstrate the use of Excel 's function and chart in the estimating the parameter of equation .

二阶模糊随机过程的均方收敛性及其应用

Mean square convergence of second order fuzzy stochastic processes and its application

本文研究包含二阶离化过程的双光子自电离；

In this paper , the two-photon autoionization involving second-order ionization processes is investigated .

基于二阶时间滞后过程的广义过程对象模型，有效地模拟工业过程特性，产生更加符合实际情况的控制图数据。

Two-order time delay process models are employed to generate more practical control charts consistent with characteristics of industrial processes .

本文证明二阶模糊随机过程重要的均方收敛的柯西准则，并在此基础上研究了模糊随机过程作为系统输入时的响应。

This paper proves the Cauchy criterion of mean square convergence of second order fuzzy stochastic processes . An application to response analysis on the systems with fuzzy random inputs is also included .

二阶矩模糊随机过程协方差函数的性质

Properties of Covariance Function for Second Order Moment Fuzzy Stochastic Process

常规内模控制对于高性能的控制系统有一定的局限性，难以兼顾各方面的性能要求而获得满意的控制效果，因此针对二阶非最小相位过程给出一种二自由度内模控制方法。

The two degrees freedom internal model control technique is implemented for two-order non-minimum phase system .

一类非自衡二阶非最小相位过程的仿真结果表明，这种方法可使系统同时具备良好的鲁棒特性和干扰抑制特性。

Simulation results of a second order non-minimum phase process show that the system has good robustness and disturbance rejection performance .

针对一类自衡二阶非最小相位过程，采用内模控制系统结构，使系统具有良好的抗扰性和鲁棒性。给出了在希望的幅值和相角裕量下控制器参数的计算方法。

In this paper , internal model control ( IMC ) system structure is adopted for second order non minimum phase processes and controller tuning method is presented based on gain and phase margin .

给出了二阶矩模糊随机过程均方极限的两种定义，证明了这两种定义的等价性，并讨论了二阶矩模糊随机过程均方极限的性质。

In this paper , we give two definitions of mean square limit of second order moment fuzzy stochastic process , and prove that the two definitions are equivalent , and discuss the properties of mean square limit of second order moment fuzzy stochastic process .

二阶非线性光学频率转换系统（即二阶参量过程）是产生可调谐相干辐射、压缩真空态、压缩相干态、压缩数态以及其它非经典态的一种强有力的工具。

Second-order nonlinear optical frequency conversion system ( i.e. second-order parametric process ) is a powerful tool for generating tunable coherent radiation , squeezed vacuum state , squeezed coherent state , squeezed Fock state and other kinds of nonclassical states of light .

这是基于块二阶Krylov子空间的投影方法，利用块二阶Arnoldi过程来生成投影空间的一组正交规范基。

It is a projection method based on a block second-order Krylov subspace . We use the block second-order Arnoldi procedure to generate an orthonormal basis of the projection subspace .

以递进的方式说明磁矢量位、修正磁矢量位与二阶矢量位的关系，写出了引入二阶矢量位的过程；

The relations among the magnetic vector potential , the modified magnetic vector potential and the second-order vector potential ( SOVP ) are shown going forward one by one .

在考虑原子电四极矩相互作用后，推导了二阶非线性极化率，并探讨了碰撞感生的二阶非线性光学过程出现的可能性。

Taking account of the contribution of electric quadrupole interaction , we derive the second-order nonlinear susceptibility . We also discuss the possibility of observation of collision induced second-order nonlinear optical processes .