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A scheme of chaotic secure communication based on the parameter modula tion and the inversion of a chaotic dynamical system is analyzed. According to this scheme,information signal is modulated by a bifurcation parameter of the transmitter,which is in chaotic state.In the receiver,a proportional integral feedback demodulator is used to demodulate the information signal,which only uses the available synchronizing error as well as stateness of receiver. The purpose of this demodulator is proposed to overcome the influence of differentiation oper ation, nonlinear part and singularities in chaotic system. Numerical simulation is proposed to show the effectiveness of this demodulator. 相似文献
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虚拟频谱分析仪中断程序的开发 总被引：1，自引：1，他引：0
虚拟仪器是1种以计算机为工具,以各种新型软件为平台的新型电子测试仪器．为了开发友好界面,系统操作平台普遍采用Windows9x系统．但该操作系统不能由用户直接控制硬件,需要开发专门的硬件设备驱动程序,即通过一系列的虚拟设备驱动程序来管理硬件,如进行中断响应、I／O端口读写或直接存储器存取（DMA）．为此,研究了Windows9x平台的虚拟环境、虚拟设备驱动程序VxD的基本方法,比较了在Windos9x中实现硬件中断的2种方法,结合开发工具VtoolsD得出了用C＋＋语言编写的硬件中断的具体编程实例．通过该仪器的开发,成功地解决了数据采集的实时性和安全性问题． 相似文献
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大型电机故障诊断系统的研制——以调相机故障诊断专家系统为例 总被引：1，自引：1，他引：0
针对传统设备检测和故障诊断方法的一些不足之处,着重讨论了专家系统在大型电机故障诊断系统中的应用及有关理论,提出了神经网络和自学习控制相结合的控制策略,大大提高了系统的诊断能力,确保了系统的安全性．该理论应用于调相机故障诊断系统,经过１ 年多的现场运行,效果良好,诊断快速性和准确性得到提高,确保了调相机的正常运行,同时减轻了技术人员的工作量． 相似文献
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A scheme of chaotic secure communication based on the parameter modulation and the inversion of a chaotic dynamical system is analyzed.According to this schems,information signal is modulated by a bifurcation parameter of the transmitter,which is in chaotic state.In the receiver,a proportional-integral feedback demodulator is used to demodulate the information signal,which only uses the available synchronizing error as well as stateness of receiver,The purpose of this demodulator is proposed to overscome the influence of differentiation operation,nonlinear part and singularities in chaotic system.Numerical simulation is proposed to show the effectiveness of this demodulator. 相似文献
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