查询词典 integral criterion

An integral square performance criterion containing tracking error and control energy was defined. Spectral factorization to minimizing the performance index for different systems was applied and corresponding parameter tuning methods of PID controller was derived, which could be used to obtain optimal control performance under control energy constraint.

定义了一个包含跟踪误差和控制能量在内的积分平方性能指标，针对不同系统运用谱分解的方法最小化该性能指标，从而导出相应的PID控制器的参数整定方法，可使系统在控制能量约束条件下具有最优的控制性能。

Firstly, applying spectral factorization to minimize an integral square performance criterion containing tracking error and control energy, an optimal control law for the nominal model is derived on condition of control energy constraint. Then, for model uncertainty, using spectral factorization to minimize the variance of the actual system performance from the nominal performance over all frequency range, a robust controller design method is abtained, which has optimal robustness of the system nominal performance to model errors.

首先针对控制对象的标称模型应用谱分解最小化一个包含跟踪误差和控制能量在内的积分平方性能指标，导出一个控制能量约束条件下的最优控制律；然后再针对模型不确定性应用谱分解最小化实际系统性能和标称性能在整个频段上的方差，得到一个鲁棒控制器的设计方法，可使系统的标称性能对模型误差具有最优的鲁棒性。

To avoid this, a robustness index is proposed as a replacement for the gain margin. Optimal controller design is the achievable by minimizing a designated error integral criterion for a load disturbance subject to inequality constraints on phase margin and the new robustness index.

因此，本文提出一强韧性指标来取代传统的增益边距，最佳强健控制器即可在相位边距和此指标的不等式限制下，透过将负载扰动产生之特定误差积分最小化来取得。

Integral comparison criterion, product of absolutely convergence series.

积分判别法；无穷乘积

Fracture experiments under biaxial loading and theoretical analysis are used to study the fracture behaviour of cruciform specimen of 16 MnR with a central penetrated ⅠⅡ mixed mode crack. A ⅠⅡ mixed mode crack J integral criterion is explored.

通过理论分析和双轴向断裂试验，对我国压力容器常用钢16MnR所制成的含中心穿透Ⅰ－Ⅱ复合型裂纹十字形试样的断裂规律进行了试验研究，探讨了Ⅰ－Ⅱ复合型裂纹J积分断裂准则。

Calculating formula of wave impedance is obtained by main values of the inverse tangent function of phase_shift at two neighboring frequencies and the corresponding integral character of phase_shift is denoted as the convergent criterion of wave impedance inversion.

利用复合反射系数中多个频率点的相移反正切函数主值，给出了波阻抗的计算公式，并把套管-地层环空间介质中波的相移的整、实特性作为波阻抗反演收敛的判据。

Based on a graphical stability criterion in parameter space, the range of proportional-gain is given. For both stable and unstable open-loop plants, the stabilizing region in integral derivative space is plotted and determined directly, not to be calculated mathematically.

基于参数空间的图解稳定性准则，在已知比例增益范围的前提下，针对稳定和不稳定开环对象，直接在积分－微分参数空间绘制和确定稳定区域，避免了复杂的数学计算。

In order to simulate the gradual expansion of the crack in ductile material which should take the affect of elastic-plastic and geometric nonlinearity into account, the EWK damage model was used as the fracture criterion to instead of stress intensity factors or J integral theory in this paper.

为解决裂纹稳态扩展的有限元数值仿真，舍弃应力强度因子和$J$积分理论，考虑韧性金属的弹塑性效应和几何非线性效应，采用基于损伤理论的EWK模型作为断裂判据。

The foundation soil is divided for finding the ultimate bearing capacity of a foundation with given buried depth and size. Supposing a uniform load acts on the foundation, Mindlin's integral formula and comer points method are used to get extra stress of every mesh knot by MATLAB program, then the principal stress is found. Combining with failure criterion, MATLAB program is used to find coordinates of points which are destroyed. Using graphic processing function of MATLAB, the failure points are showed in the coordinate.

为确定作用在已知埋深、给定基础形状地基土上的极限承载力，对基底下的土体进行网格划分，先假定一均布荷载作用在此地基土上，运用明德林解的积分公式，结合角点法，编制MATLAB语言程序，求出每个网格节点上附加应力，进而求得每个网格节点上主应力，根据破坏准则，结合程序找出破坏点的坐标，利用MATLAB的图形处理功能，把破坏点的坐标在坐标图中显示出来。

We present a simple new algorithm for the inverse Laplace transform. The applications of this new algorithm to the signal processing, the Fuoss-Kirkwood formulas for relaxation spectra, the Abel integral equation, the Fermi and Bose integral equation are also given.

提出了处理Laplace逆变换的一种简单的新算法，以及这种新算法在信号处理、Fuoss-Kirkwood弛豫谱方程、Abel积分方程、Fermi型和Bose型积分方程等方面的应用。

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。