基于非修正方法的认识进程及其极限

基于一阶逻辑，在对假说中的不一致信念不做任何修正的条件下，将根据已有的信念能够推出的没有相反信息的结论的集合作为假说的扩充，假说的扩充是单调的，当且仅当假说在增长过程中没有遇到相反的信息。如果将假说的无限增长过程理解为一个认识进程，则认识进程中假说的扩充收敛于一个确定的极限。     

针对不稳定对象的三自由度内模控制

针对部分内模控制（Partial Internal Model Control）仅有一个可调节参数，性能调节不明确，调节范围小等不足，提出部分内模控制与三自由度内模控制相结合的控制器设计方法.理论分析和仿真结果表明，这种方法对存在干扰和模型失配的不稳定对象具有调节参数明确，控制效果好，调节范围明显增大的优点.     

Delay-dependent robust passivity control for uncertain time-delay systems

The robust passivity control problem is addressed for a class of uncertain delayed systems with time-varying delay. The parameter uncertainties are norm-bounded. First, the delay-dependent stability sufficient condition is obtained for the nominal system, and then, based-on the former, the delay-dependent robust passivity criteria is provided and the corresponding controller is designed in terms of linear matrix inequalities. Finally, a numerical example is given to demonstrate the validity of the proposed approach.     

Control of Chaos in Lu System Subject to Mismatch Uncertainties Using Sliding Mode Design

A strategy is proposed to control Lu It is implemented by using sliding mode control system with mismatch uncertainties. The proposed controller ensures the occurrence of the sliding mode motion. It is guaranteed that under the proposed control law, the system state can be regulated to a specific point or in a predictable neighborhood of desired points in the state space even with mismatch uncertainties. Simulation results have illustrated the effectiveness and robustness of the proposed schemes even though the control input is nonlinear.     

Method for array gain and phase uncertainties calibration based on ISM and ESPRIT

A now method for array calibration of array gain and phase uncertainties, which severely degrade the performance of spatial spectrum estimation, is presented. The method is based on the idea of the instrumental sensors method (ISM), two well-calibrated sensors are added into the original array. By applying the principle of estimation of signal parameters via rotational invariance techniques (ESPRIT), the direction-of-arrivals (DOAs) and uncertainties can be estimated simultaneously through eigen-decomposition. Compared with the conventional ones, this now method has less computational complexity while has higher estimation precision, what's more, it can overcome the problem of ambiguity. Both theoretical analysis and computer simulations show the effectiveness of the proposed method.     

不确定非线性系统的模糊保性能容错控制

针对一类具有范数有界参数不确定性的非线性系统和一个二次型性能指标,提出了在执行器故障时保性能控制器的设计方法。采用线性矩阵不等式的方法,得出了系统在执行器故障时保性能控制律存在的充分条件,使系统对允许的不确定性具有鲁棒性,并达到一定的性能指标。仿真结果表明该方法的有效性。     

相关选择论--当代知识论对怀疑主义的批判

相关选择论认为,不仅怀疑主义的假设不是相关选择,与认识无关,而且怀疑主义的论证方式也不具普适性,因此,怀疑主义的论证是错误的.相关选择论对知识论有重要的启示意义.     

多输入多输出非线性系统的多面滑模控制

针对多输入多输出非线性系统 ,提出一种基于模糊小脑关联结构模型 (CMAC)神经网络的多面滑模变结构控制算法 ,特点是无需已知不确定性函数及其各阶导数的上界 ,证明了系统的状态及权值误差有界。与经典设计方法相比 ,所提出的方案允许非参数化不确定性。仿真实例显示了方法的有效性。     

把握性印象中的知识型断裂——试析斯多亚感性认识论的哲学意义

斯多亚哲学中的"把握性印象"学说是一个十分有特色的新理论。它的意义超出了一般的感性认识理论,集中体现出了希腊化罗马哲学中出现的现代性知识型和古典性知识型之间的张力。斯多亚哲学对把握性印象的内证真理标准的强调意味着对感性知识的绝对确定性的追求和对个体之间清晰区分的分析性追求,由此而来的是对个体的"注视"式知识和经验还原论的强调,对人能够"把握"对象世界的自信。这表明在斯多亚的古典"智慧"型认识论中已经出现了新知识型的趋向。     

归一性和情态

功能语法中的归一性和情态这两个概念相互联系又相互区别,各自表示不同的人际意义。经过分析发现,功能语法的描述混淆了它们之间的相互区别,不利于人们认识小句的情态意义及人际功能。传统语义学的相关论述有助于认识这些概念的本质,澄清它们之间的界限。