INTELLIGENT SECURITY SYSTEMS ENGINEERING FOR MODELING FIRE CRITICAL INCIDENTS： TOWARDS SUSTAINABLE SECURITY

An intelligent security systems engineering approach is used to analyze fire and explosive critical incidents, a growing concern in urban communities. A feed-forward back-propagation neural network models the damages arising from these critical incidents. The overall goal is to promote fire safety and sustainable security. The intelligent security systems engineering prediction model uses a fully connected multilayer neural network and considers a number of factors related to the fire or explosive incident including the type of property affected, the time of day, and the ignition source. The network was trained on a large number of critical incident records reported in Toronto, Canada between 2000 and 2006. Our intelligent security systems engineering approach can help emergency responders by improving critical incident analysis, sustainable security, and fire risk management.     

增益符号未知的鲁棒自适应模糊控制

针对一类具有函数控制增益符号未知的不确定非线性系统,根据滑模控制原理和模糊系统的逼近能力,提出了一种自适应模糊控制器设计新方案。该方案利用Nussbaum函数的性质,取消了常用的函数控制增益符号已知这一条件。并通过引入最优逼近误差的自适应补偿项来消除建模误差和参数估计误差的影响。理论分析证明了闭环系统的有界性和跟踪误差收敛到零。仿真结果表明了该方法的有效性。     

EXTREME POINT RESULTS FOR STRICT POSITIVE REALNESS OF TRANSFER FUNCTION FAMILIES

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Modeling of cognitive framework in time-stressed decision making

An approach for modeling a human cognitive framework in time-stressed decision making is presented. The recognitive and metacognitive processes that represent the cognitive framework are modeled by the colored Petri nets (CPNs). A structural and behavioral analysis method is adopted to obtain the static and dynamic property used to verify the CPNs model of the cognitive framework. Finally, an example from the command and control radar recognition system is used to evaluate the feasibility and availability of the CPNs model adopted in practical systems.     

人体生物节律报警原理探讨

<正> 一、问题的提出 人体生物节律理论作为预防事故发生的一种方法,已被广泛地应用于铁路、公路、航空和一般工业企业,并取得了较明显的效果。 人体生物节律理论指出,所有的人,从他们出生之日起,体力、情绪、智力活动分别以23天、28天和33天为一个循环周期,并以正弦曲线的形态     

FDA-MIMO雷达主瓣距离欺骗式干扰抑制方法

主瓣欺骗式干扰降低了对真实目标的估计精度与跟踪准确性,对传统雷达提出了挑战。针对此问题,基于频率分集阵(frequency diverse array, FDA)-多输入多输出(multiple input and multiple output,MIMO)雷达,提出了一种抑制主瓣距离欺骗式干扰的方法。假目标产生器通过对截获的雷达信号进行延迟转发,导致真、假目标的时延(距离)差异,由此可形成具有不同发射频率的假目标。据此,首先利用频率分集阵雷达的距离维自由度在联合发射-接收维对真、假目标进行区分,其次设计了距离-角度二维自适应匹配滤波器,所有假目标由于距离维的失配而被抑制。该方法有效地解决了主瓣距离欺骗式干扰抑制的问题,提升了雷达在复杂电磁环境的抗干扰性能。仿真实验验证了所提方法的有效性。     

通信网络性能的敏感性分析

本文基于笔者提出的一种可行的通信网可靠性评价模型,进行了网络性能的敏感性分析,得到了若干有意义的结果。本模型充分考虑了通信系统的动态特性、随机性、模糊性及系统毁坏后的可修复特性。本模型以节点的连通性、平均响应时延及系统的总品质因数作为评价指标,通过敏感性分析,以达到优化通信网络系统的目的。     

Rules-based object-relational databases ontology construction

To solve the problems of sharing and reusing information in the information system, a rules-based ontology constructing approach from object-relational databases is proposed. A 3-tuple ontology constructing model is proposed first. Then, four types of ontology constructing rules including class, property, property characteristics, and property restrictions axe formalized affording to the model. Experiment results described in Web ontology language prove that our proposed approach is feasible for applying in the semantic objects project of semantic computing laboratory in UC Irvine. Our approach reduces about twenty percent constructing time compared with the ontology construction from relational databases.     

Moment Equations of Linear It Stochastic Systems with Applications

1.INTRODUCTIONAsiswellknown,stochasticsystemmodeloftheIt6typeisoneofthemostimportantmodelsforstochasticsystems,manystochasticsystemswithcolorednoisecanbestudiedwithhelpoftheIt6stochasticsystems[if.ForthestabilityandcontrolproblemofIt6stochasticsystems,nlallyresultshavebeenobtainedintheliteratures[l~6].Whilesomebasicproblems,suchasthenecessaryandsufficientconditionofmean-squarestabilityoflinearIt6stochasticsystems,havehotbeensolved.Inthepreviousliterature,someresultsonthestabilityoflinear…     

离散线性区间系统的分支稳定性

研究了离散区间系统的一种特殊形式的稳定性 ,即分支稳定性。分别给出了离散区间系统分支渐近稳定性和指数分支渐近稳定性的定义。证明了离散区间系统是分支渐近稳定的 ,且仅当系统矩阵在每一时刻都将满足一个约束条件的系统状态向量变换成满足另一个约束的向量。由此利用不等式的性质分别给出了离散区间系统分支渐近稳定和指数分支渐近稳定的充要条件     

一类复杂系统自适应观测器设计

分析和研究了一类非线性不确定复杂控制系统的自适应状态观测器设计问题,利用模糊逻辑系统具有充分逼近连续函数的性质,在状态观测器的鲁棒项构造中引入了模糊逻辑系统的输出,并用它完成了逼近系统中不确定性的任务,从而削弱了已有的研究成果在设计这类系统状态观测器时所使用的较为苛刻的假设条件,并证明了所设计的观测器与被控系统状态间的误差及各参数估计误差一致终极有界。最后用仿真实例证明了所采用方法的有效性。     

复杂动力系统初探

探讨传统动力系统与复杂系统之间的关系，并指出某些系统确实具有复杂系统的明显特征，首先研究切换系统，指出这种系统具有1＋1≠2的的特征，并进一步研究这种系统的一些特点，其次，考虑一类动力系统的演化模型，指出这种系统改变着自己的环境和形态，但某些性质不变，将其称为遗传性质，这是我们用严格数学理论与动力系统理论研究复杂系统的尝试。     

运用马尔柯夫信源熵量化航天型号研制经验不确定性的研究

分析了国内外航天费用估算不确定性分析方法和研制经验不确定性的特性 ,通过运用马尔柯夫信源熵在刻划随机过程方面的优势 ,实现了航天型号研制经验不确定性的量化.     

An Holistic Approach to the Management of Information Systems Development—A View Using a Soft Systems Approach and Multiple Viewpoints

This paper argues that only a systems-based approach to information systems development is likely to cover all the recognized problem issues reported in the literature. It is then shown that software development can be characterized by the structure of the Soft Systems Methodology, so that this methodology acts as a metaphor for the process of information systems development. The structure of this methodology can be seen at lower levels of the development process, and so the model generated here is seen as recursive. Further, information systems development is seen as an unstructured business problem that can be characterized by the Multiple Viewpoint approach. The connections between this approach and the methodology are identified. Finally, the unifying link between these approaches and all forms of action research is identified.     

AN ELIMINATION METHOD FOR DIFFERENTIAL POLYNOMIAL SYSTEMS I

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战略决策专家系统中的一种新知识表示方法

介绍了战略决策专家系统中一种新的知识表示方法“分解－综合”知识表示法，给出了“分解－综合”表示法的应用实例，指出了“分解－综合”表示法的优点.     

The Oblivion of Churchman's Plea for a Systems Approach to World Problems. II. The Rise of the Modern Constellation

This is the second article in a trilogy devoted to inquiring about the historical meaning of the intimate link between a systems approach and world issues, so appropriate for Churchman's initial work on systems. After examining the logical relationship between modern systems thinking and world issues in the first article, in this second article the historical conditions for the formation of modern systems thinking are explored. It is shown how the intimate relationship between the will to systems and the notion of humanity gives full meaning, within the modern constellation, to Churchman's plea for a systems approach to world problems. However, in the light of this historical–ontological inquiry, systems thinking appears as both a propellant for the formation of the new constellation of modernity and a propellant for its destruction.     

共享合成Petri 网系统的活性保持性

讨论了能对资源共享问题进行建模的共享合成操作.重点研究共享合成Petri网系统的活性保持性,同时还讨论了在共享合成过程中系统的并发行为关系即并发语言关系.给出相应的语言关系式,它可用于判定合成系统的活性.进一步,给出了判定合成系统有活性的充分必要条件.最后,提出了合成系统保持子系统活性的条件.     

一个典型C~3I系统的微分方程作战模型的建立

本文针对目前C~3I系统建模研究遇到的难题:如何把C~3I系统的组成内容与它所处的战争环境结合起来,运用复杂系统的一些建模方法、基于问题导向的原则,提出了一套战争环境下C~3I系统建模的规范化建模方法,使C~3I系统与军方常用于描述作战的Lanchester型格斗方程有机地结合起来,形成C~3I系统的作战方程。文中以一个典型的防空作战的C~3I想定进行了具体的计算,建立了该想定的微分方程模型。结果表明,这种方法解决了C~3I系统与Lanchester方程的结合问题,从而使C~3I系统本身的各个组成部分能在模型中与作战环境有机地结合起来。