To test if lowering cyclic AMP could help restore brain function in these monkeys, the researchers injected tiny amounts of drugs that block it in the vicinity of certain memory-holding neurons.
Experiments are made on sandstone and quartz powder, whose structures are incompact under the function of cyclic stresses.
在循环应力作用下，对砂岩和石英砂两种结构较松散的样品进行了实验研究。
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The Fourier polynomial fitting is compared with the Chebysher polynomial fitting in the division of cyclic time interval and fitting accuracy as well as convergence of function.