摆动物

The author found that the chromone ring could be cleaved at high temperature in PPA, and the change of the ratio of ring-opened product versus the target one with the change of reaction time and temperature was investigated in details.

我们采用了两条不同的合成路线合成了第Ⅳ类化合物，对部分反应条件进行了优化，在研究过程中发现了色酮化合物在高温下的开环反应及多聚磷酸的水解作用，并对前者进行了详细研究了，获得了不同反应温度和时间下未开环产物和开环产物的比例，得到了制备相应的未开环产物和开环产物的最佳反应条件。

Being of the open-loop control technique,the PWCT is fittable forsuppressing chaos in the ODS with wide period windows when supportedwith the quick algorithm of scanning and localizing the periodwindows,which has been developed for the easy application of thePWCT.The result of the computer simulation of controlling theopticalsecond-harmonic system with the PWCT is presented in the text forattestation.

周期窗口控制技术为开环控制技术，具有快速、简便、易行的特点，它主要适用于在周期窗口较宽的情形下对光动力学系统进行快速混沌压制控制，为便于其应用文中同时开发了相应的周期窗口快速搜索及定位技术，并给出了利用二者控制光学二次谐波系统的计算机仿真结果。