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司南版教材中"模拟气压的产生"演示实验所需的实验装备在中学尚未普及,为解决这一问题,形象生动地演示该实验,利用日常易得的物品制作了"气体压强的产生"模拟演示器,详细介绍了该演示器的制作与演示方法. 相似文献
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固体热胀冷缩实验一般都采用"金属环+金属球"进行演示.本文对该演示实验相关物理原理进行了深入研究,并利用固体热胀冷缩特性作为"激光电路系统的通断控制"开关,利用"光路的微小放大作用"显现固体热胀冷缩的效果,研制出一种新型固体热胀冷缩综合演示仪. 相似文献
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A temporal difference method for processing dynamic speckle images is proposed. In the method two speckle images of an object, separated by a time interval, are subtracted one from the other to detect whether the speckle structure has changed or not. The rationale of the method is discussed. A variant of the method that allows measuring the area of an activity zone surrounded by a static region is tested in digital simulations. As a demonstrative experiment, that variant is employed to characterize the drying of a damp patch in filter paper. 相似文献
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本文以INEPT脉冲序列为例,从理论和实验上研究了在极化转移NMR实验中的质子同核耦合调制效应,并对与具有1/2自旋的被观测核之间有不同耦合常数的两组质子同时进行极化转移的情况作了探讨. 相似文献