The technology of fluorescence spectra has important application in the studying about the material structure and the dynamics process of material reciprocity. The bio - sensor or chemical sensor based on the fluorescence has been researched widely. It is a hot topic to improve the sensitivity of fluorescence based sensor. The nano - metal particles or structure can enhance the fluorescence intensity effectively. It is necessary to study the physical mechanism for the surface plasmonic enhanced fluorescence. In this paper, we discuss the principle of fluorescence radiation and the physical mechanism for the surface plasmonic enhanced fluorescence.. There are three theory model including fluorescence resonant energy transfer, surface plasmonics resonant enhanced fluorescence radiation and the Radiating plasmons model.%在Chlorine—iodine—malonic—acid反应扩散体系中，研究了时间延迟反馈对体系时空动力学的控制作用。首先，理论分析发现调节延迟时间和反馈强度会影响体系霍普夫分岔行为。其次，数值模拟发现时间延迟反馈可诱导体系从稳定定态、图灵斑图态向螺旋波态、整体振荡态的转变。
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