Time-dependent wave selection for information processing in excitable media.
Time-dependent wave selection for information processing in excitable media.
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可兴奋介质中信息处理的时间相关波选择。
DOI：
10.1103/physreve.85.066129
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Stevens WM
中科院分区：
文献类型：
--
作者：
Stevens WM
我们展示了一种改进的技术，用于实现光敏感的化学可激发介质中的逻辑电路。该技术利用波在可激发介质中沿着限定的通道的恒定速度传播，基于Belousov-Zhabotinsky反应，沿着碰撞波的相互湮灭。这项工作与以前在这一领域的工作的区别在于，通道在交界处相遇的区域可以周期性地在允许波传播和阻止波传播之间交替。这些阀状区域用于基于波从一个阀传播到另一个阀所花费的时间长度来选择波。在一个实验性的实现中，组成电路布局的通道由连接到计算机的数字投影仪投影。可兴奋通道被投影为暗区，不可兴奋区域被投影为亮区。阀门在黑暗和光明之间交替：每个阀门都有相同的周期和相位，占空比为50。这种方案可以用来制造基于与非操作组合的逻辑门，而几何约束很少。因为几乎没有几何约束，所以可以实现紧凑的电路。给出了一个四位输入、两位输出的整数平方根电路的实验结果。
We demonstrate an improved technique for implementing logic circuits in light-sensitive chemical excitable media. The technique makes use of the constant-speed propagation of waves along defined channels in an excitable medium based on the Belousov-Zhabotinsky reaction, along with the mutual annihilation of colliding waves. What distinguishes this work from previous work in this area is that regions where channels meet at a junction can periodically alternate between permitting the propagation of waves and blocking them. These valvelike areas are used to select waves based on the length of time that it takes waves to propagate from one valve to another. In an experimental implementation, the channels that make up the circuit layout are projected by a digital projector connected to a computer. Excitable channels are projected as dark areas and unexcitable regions as light areas. Valves alternate between dark and light: Every valve has the same period and phase, with a 50duty cycle. This scheme can be used to make logic gates based on combinations oforandand-notoperations, with few geometrical constraints. Because there are few geometrical constraints, compact circuits can be implemented. Experimental results from an implementation of a four-bit input, two-bit output integer square root circuit are given.