As a new wireless self-organization network, wireless sensor network has beenwidely used in military defense, environmental science, health care and so on. Modelingand performance analyzing for wireless sensor network has been a hot spot in currentwireless network research.IEEE802.11 as the primary standard of wireless network communication protocol,defines Medium Access Control (MAC) layer, its effect is
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Chaos is a kind of quasi-stochastic dynamical behaviors of determinate nonlinear system. It has attracted common attention and has been extensively studied for last decades. While chaos control and anti-control are the basic problems of the application of chaos. To deal with these problems, a lot of effective methods have been produced. But the sensitivity
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The development of economic has brought about the springing up of cars which,as a result,greatly challenges the parking demands of city centers.The parking guidance and information system (PGIS) is focused as a solution to the contradiction between continuously increasing parking demands and limited parking lots.How to set up an intellective PGIS with high efficiency has
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In recent years, with the rapid development of distributed multi-agent systems, distributed cooperative control research becomes a hot spot in the field of control science research. The cooperative control of multi-agents investigates how a large number of individuals with simple function can perform complicated tasks or achieve cooperative group behaviors by distributed control. As the
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DSP is the key component of the data operation of the wireless communication. In the fourth wireless communication of the future, speech and data processing rate of personal users will raise substantially. In the process of audio and video, it involves a great deal of data operation, such as discrete cosine transform and inverse transformation,
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It is important and pressing to develop the photoelectric countermeasure device especially laser countermeasure device for the photoelectric guided weapon, which has tremendous battle power and ratio of effect and cost in the attacking high value target. On the other hand, many important photoelectric devices are being threatened by laser countermeasure weapon that is being
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Since the naissance of modern control theory at the end of 19’50, the control theory has got far development. Much result of the modern control theory is based on the accuracy math model. However, most of model on control object are uncertainty. That because it’s unavoidable to include uncertain parameters and disturbance in practical control
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Knowledge discovey is a hot research field in artificial intelligent. However, there are still many un-resolved problems in this field, such as the meagar of the knowledge presentation, knowledge extraction under complex data and data environments (for example, the incremental data environment), reduct the features of high dimensional data and evalution for the knowledge after
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Recent years witnessed the full-grown development of nonlinear systems control theory,one of the research hotspots in control theory.Especially with the introduction of differential geometry methodology,the nonlinear control systems theory has been made great progress.However,the research outcome is still insufficient on the more common issues of time-delay and saturation of nonlinear control systems.As well known,the phenomena
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Nonlinearity is universal for the free-electron lasers. This dissertation focuses on some problems related to the nonlinear behaviors in free-electron lasers. A detailed discussion of the basic FEL theory is provided, and this is the basis for our investigations. For a relativistic electron which is nonideally injected into an undulator, the spontaneous radiation spectrum is
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