人工智能可控性探究

由当前人工智能的某些不可控案例出发,联想到人工智能的脆弱性与不确定性,试探性地提出了提高人工智能可控性的方法。主要分为五个部分：第一部分首先简述人工智能的提出与发展;第二部分介绍聊天机器人以及其他人工智能产品的具体不可控案例;第三部分主要探讨人工智能技术脆弱性和不确定性的来源;第四部分提出提高人工智能可控性的几点建议,包括增强人工智能的场景感知能力、在系统架构中部署可控节点以及通过可控节点健全监管评估体系;第五部分描述人工智能技术在光电等领域的展望。     

一种基于小波变换的可调节遥感影像融合方法

光谱保持和高分辨率保留是影像融合的两个重要问题,不同的应用可能对融合的结果有不同的要求．提出了一种基于小波变换的可调节遥感影像融合方法．该方法首先分别将高分辨率影像和多光谱影像进行小波分解,然后根据影像的特点,在小波域内进行影像融合,最后通过小波逆变换得到融合结果．通过引入可调节参数,该方法可以在细节保留和光谱保持两方面达到不同程度的平衡,在某些参数组合下,融合图像的目视效果和统计指标可以达到甚至超过传统的小波融合法、IHS变换和主成分变换融合法的效果．     

可信网络的关键问题研究

传统的网络安全系统已经不能满足可信的需求,可信网络应运而生。本文介绍了可信网络的基本概念和基本属性,分析了可信网络中的建模,体系结构,可控性和可生存性等关键问题,并讨论了移动网络中的可信机制。     

非线性稳定无交互控制的例题及反例研究

本文首先给出非线性控制系统的一般稳定无交互控制问题可解的一个一般结论,进而研 究两个例题,其中之一揭示所涉及问题中典型的非线性现象,另一个表明以往一个结论的错 误.     

Stabilization of switched linear systems with bounded disturbances and unobservable switchings

This paper studies the stabilization problem of switched linear systems with bounded disturbances. It is assumed that the system switches among an infinite set of uniformly controllable linear systems, and that the switching signals are not observable, but the switching duration has a lower bound. It will be shown that by combining on-line adaptive estimation and control in the controller design, a feedback control law can be constructed which makes the switched linear system globally stable.     

Decentralized state feedback control of discrete event systems

In this paper, we consider decentralized state feedback control of discrete event systems with a (global) control specification given by a predicate. In this framework, instead of a global state feedback, each local state feedback controls a part of the system according to local information so that global behaviors satisfy the global control specification. We introduce the notion of n-observability of predicates, and present necessary and sufficient conditions for the existence of a decentralized state feedback which achieves the global control specification.     

A graph-theoretic characterization of structurally fixed modes

A characterization of structurally fixed modes in linear systems is given in the graph-theoretic framework. The characterization results in a computationally efficient test for stabilizability of systems under feedback structure constraints.     

2-D系统模能控性和模能观性判据

本文指出并纠正了文［１～３］关于２－Ｄ系统模能控性和模能观性判据的错误。     

Robust stability considerations in optimal design of dynamic systems under uncertainty

This paper presents a method for the incorporation of robust stability criteria in the design of dynamic systems under uncertainty. Process systems are modelled via dynamic mathematical models, variations include both uncertain parameters and time-varying disturbances, while control structure selection and controller design is considered as part of the design optimization problem. Stability criteria are included, based on the concept of the measure of a matrix, to maintain desired dynamic characteristics, in a multiperiod design formulation. A combined flexibility-stabiluty analysis step is also introduced to ensure feasible and stable operation of the dynamic system in the presence of parametric uncertainties and process disturbances. The potential of the proposed approach is illustrated with a ternary distillation column design and control problem (featuring a rigorous tray-by-tray model).     

广义系统能控性的几个注记

本文首先给出了广义系统能控性与正常系统能控性的关系,并由此讨论了广义系统最优 经济结构综合问题及能控性程度的度量形式.最后给出了工程算例.