期刊
INTERNATIONAL JOURNAL OF COMPUTERS COMMUNICATIONS & CONTROL
卷 4, 期 3, 页码 273-282出版社
CCC PUBL-AGORA UNIV
DOI: 10.15837/ijccc.2009.3.2435
关键词
membrane computing; P system; spiking neural P system; computability
资金
- National Natural Science Foundation of China [60674106, 30870826, 60703047, 60803113]
- Program for New Century Excellent Talents in University [NCET-05-0612]
- Ph.D. Programs Foundation of Ministry of Education of China [20060487014]
- Chenguang Program of Wuhan [200750731262]
- HUST-SRF [2007Z015A]
- Natural Science Foundation of Hubei Province [2008CDB113, 2008CDB180]
- Proyecto de Excelencia con Investigador de Reconocida Valia
- de la Junta de Andalucia [P08 - TIC 04200]
Besides usual spikes employed in spiking neural P systems, we consider anti-spikes, which participate in spiking and forgetting rules, but also annihilate spikes when meeting in the same neuron. This simple extension of spiking neural P systems is shown to considerably simplify the universality proofs in this area: all rules become of the form b(c) -> b' or b(c) -> lambda, where b,b' are spikes or anti-spikes. Therefore, the regular expressions which control the spiking are the simplest possible, identifying only a singleton. A possible variation is not to produce anti-spikes in neurons, but to consider some inhibitory synapses, which transform the spikes which pass along them into anti-spikes. Also in this case, universality is rather easy to obtain, with rules of the above simple forms.
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