一种Agent的偏好系统及其建立

受到Agent偏好模型的启发,提出了一个新的描述人们行为的偏好系统称为AF系统,它将Michael Freund的理性偏好推理与Adams提出的经典的归纳逻辑和概率逻辑相结合,即借助经典的逻辑系统,把人们的逻辑推理和以人们的偏好取向为基础的常识性推理以及以主观愿望为基础的意向推理结合在一起成为一个有机系统,并且在这个系统下提出Agent的理性偏好的建立方法以及推理步骤.最后给出一个实例,说明它能根据人们的部分愿望,全面估计人们的偏好走向,而且一旦人们的基本态度有所转向,偏好结构也可做相应调整,无需做根本改动,因此它具有鲁棒性和实用价值.     

闪电快电场信号时频特性的小波分析

应用小波变换方法将具有短时非平稳特点的闪电快电场时域波形信号转换到二维的时频平面,从时间和频率上同时描述闪电快电场信号的电场强度或相对能量分布,揭示其所包含的不同频率分量及其随时间变化的特性.分析结果表明,基于小波变换的闪电快电场信号时频特性分析可以挖掘闪电电场更深层次的变化规律和特征;也为闪电放电类型的识别研究提供了新的思路.     

一种新型机载防浪涌电压保护电路设计

设计了一种新型的机载过压保护电路.该电路以芯片LT4356和APL502L为主要器件,简单可靠,能够满足防80 V/50 ms浪涌电压要求.介绍了该防浪涌电压保护电路主要特点和参数设计,并对该电路进行了仿真分析.相应实验结果表明,该电路是一种可靠有效的机载过压保护电路.     

Genetic adaptive state estimation

A genetic algorithm (GA) uses the principles of evolution, natural selection, and genetics to offer a method for parallel search of complex spaces. This paper describes a GA that can perform on-line adaptive state estimation for linear and nonlinear systems. First, it shows how to construct a genetic adaptive state estimator where a GA evolves the model in a state estimator in real time so that the state estimation error is driven to zero. Next, several examples are used to illustrate the operation and performance of the genetic adaptive state estimator. Its performance is compared to that of the conventional adaptive Luenberger observer for two linear system examples. Next, a genetic adaptive state estimator is used to predict when surge and stall occur in a nonlinear jet engine. Our main conclusion is that the genetic adaptive state estimator has the potential to offer higher performance estimators for nonlinear systems over current methods.     

Multiple Comparisons in Induction Algorithms

A single mechanism is responsible for three pathologies of induction algorithms: attribute selection errors, overfitting, and oversearching. In each pathology, induction algorithms compare multiple items based on scores from an evaluation function and select the item with the maximum score. We call this a multiple comparison procedure (MCP). We analyze the statistical properties of MCPs and show how failure to adjust for these properties leads to the pathologies. We also discuss approaches that can control pathological behavior, including Bonferroni adjustment, randomization testing, and cross-validation.     

Investigation on AQ11，ID3 and the Principle of Discernibility Matrix

The principle of discernibility matrix serves as a tool to discuss and analyze two algorithms of traditional inductive machine learning,AQ11 and ID3.The results are:(1) AQ11 and its family can be completely specified by the principle of discernibility matrix;(2) ID3 and be partly,but not naturally,specified by the principle of discernibility matrix;and (3) The principle of discernibility matrix is employed to analyze Cendrowska sample set,and it shows the weaknesses of knowledge representation style of decision tree in theory.     

矿井中频感应通信系统研究

分析与研究矿井中频感应通信系统 ,并提出了一种新型的矿井中频数字感应通信系统。这种系统采用连续可变斜率增量调制 (CVSD)来实现语音信号的编码、GFM调制解调方式、FDMA、PLL频率合成器技术。本系统具有通话质量好、设备简单、抗衰减能力强等特点 ,适于矿井通信。     

高频接近开关检测原理与设计

研究了电感式接近开关工作电路的原理,其电路可分为振荡电路、检波电路和输出电路三部分,对这三部分电路分别进行了研究以及详细说明。     

一种用于推挽式电压型逆变器的低损耗无源吸收电路

提出并实现了一种推挽式PWM电压型逆变器用无源吸收电路;设有独立的放电回路让缓冲电容器上的能量部分地回馈到直流电源中,高频放电能量不会叠加在输出电压上;缓冲电容器的电压被钳位,使得推挽电路特有的倍压不会在吸收电路上造成额外的损耗。给出吸收电路参数的设计准则和计算实例,在200VDC和30kW级的中压中功率逆变装置中发挥了推挽拓扑的优点。理论分析和实验验证了所提方法的有效性。     

基于电感式位置检测原理的带钢纠偏控制方法

针对带钢跑偏问题，介绍了采用电感式检测装置进行检测的纠偏控制方法。详细介绍了电感式纠偏控制的检测原理及其系统组成。电感式纠偏检测方法以其独特的优点已广泛应用于各种导磁性带钢纠偏控制系统中。