quadratic constraints

For discrete time systems, a robust stability criteria based on the recently developed integral quadratic constraints ( IQC) method is given. A large variety of the classical stability results can be unified and generalized using the notion IQC.

利用新近发展起来的积分二次约束（IQC）方法，对离散时间系统，给出了其鲁棒稳定性分析准则，使一大类古典稳定性结果可以统一和概括在积分二次约束的框架之下。

The system consists of a stable linear time invariant system in its forward loop and dynamic uncertainties in the feedback loop, which can be described by an uncertain operator with its input time derivative satisfies integral quadratic constraints.

所考虑的系统由正向通道的线性时不变稳定系统与反馈通道的不确定动态特性所构成的闭环系统。反馈通道的不确定性由输入导数满足积分二次约束（IQC）的非线性算子描述。

A QPSK blind sequence detection algorithm based on the ε-equalization principle is proposed. The algorithm can formulate the quadrature phase shift keying blind sequence detection into a quadratic programming with integer constraints.

给出了基于ε-均衡准则的QPSK序列盲检测算法，该算法将QPSK序列盲检测问题转化为带整数约束的二次规划问题。

A computational model updating algorithm with the least squares under quadratic constraints is proposed.

提出了一种结构计算模型修正的二次约束最小二乘方法.

A model updating optimization algorithm under quadratic constraints is applied to structure dynamic model updating.

将二次约束优化方法应用于结构动力模型修正问题中.