麻豆淫院

(麻豆淫院Org.com) -- Information processing circuits in digital computers are static. In our brains, information processing circuits鈥攏eurons鈥攅volve continuously to solve complex problems. Now, an international research team from Japan and Michigan Technological University has created a similar process of circuit evolution in an organic molecular layer that can solve complex problems. This is the first time a brain-like "evolutionary circuit" has been realized.

A team of researchers from Japan and Michigan Technological University has built a molecular computer using lessons learned from the human brain.

麻豆淫院icist Ranjit Pati of Michigan Tech provided the theoretical underpinnings for this tiny computer composed not of silicon but of organic molecules on a gold substrate. 鈥淭his molecular computer is the brainchild of my colleague Anirban Bandyopadhyay from the National Institute for Materials Science,鈥� says Pati. Their work is detailed in 鈥淢assively Parallel Computing on an Organic Molecule Layer,鈥� published April 25 online in Nature 麻豆淫院ics.

鈥淢odern computers are quite fast, capable of executing trillions of instructions a second, but they can鈥檛 match the intelligent performance of our brain,鈥� says Pati. 鈥淥ur neurons only fire about a thousand times per second. But I can see you, recognize you, talk with you, and hear someone walking by in the hallway almost instantaneously, a Herculean task for even the fastest computer.鈥�

That鈥檚 because information processing is done sequentially in digital computers. Once a current path is established along a circuit, it does not change. By contrast, the electrical impulses that travel through our brains follow vast, dynamic, evolving networks of neurons that operate collectively.

The researchers made their different kind of computer with DDQ, a hexagonal molecule made of nitrogen, oxygen, chlorine and carbon that self-assembles in two layers on a gold substrate.

The DDQ molecule can switch among four conducting states鈥�0, 1, 2 and 3鈥攗nlike the binary switches鈥�0 and 1鈥攗sed by digital computers.

鈥淭he neat part is, approximately 300 molecules talk with each other at a time during information processing,鈥� Pati says. 鈥淲e have mimicked how neurons behave in the brain.鈥�

鈥淭he evolving neuron-like circuit network allows us to address many problems on the same grid, which gives the device intelligence," Pati says. As a result, their tiny processor can solve problems for which algorithms on computers are unknown, especially interacting many-body problems, such as predictions of natural calamities and outbreaks of disease. To illustrate this feature, they mimicked two natural phenomena in the molecular layer: heat diffusion and the evolution of cancer cells.

In addition, their molecular processor heals itself if there is a defect. This property comes from the self-organizing ability of the molecular monolayer. 鈥淣o existing man-made computer has this property, but our brain does,鈥� Bandyopadhyay says. 鈥淚f a neuron dies, another neuron takes over its function.鈥�

鈥淭his is very exciting, a conceptual breakthrough,鈥� Pati says. 鈥淭his could change the way people think about molecular computing.鈥�

An abstract of 鈥淢assively Parallel Computing on an Organic Molecule Layer鈥� Nature 麻豆淫院ics.