periodic reinforcement
... periodic psychosis 周期性精神病 periodic reinforcement 定时强化 periodic sampling 周期抽样 ...
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固定时距强化 fixed interval reinforcement
定时距强化方式 fixed interval reinforcement schedule
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方法：观察完整时相，确定时间窗。分析初始强化形式以及该形式与二维图像、CDFI的关系。
Methods Whole phase manifestation was observed to determine the time-window and to analyse the early enhancement forms and the relationship between enhanced image and B-mode image and CDFI.
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