According to the US Fun Science website reported on the 26th, American scientists have developed a new type of "diffuse medical memristor" that simulates the behavior of two neurons in the human brain - the behavior of intracellular calcium ions, a history of fidelity. The highest since. Researchers say the new device will help develop brain-like (neuromorphic) computers. Such computers perform better and are more energy efficient than traditional computers in performing perception and learning tasks.
Yang Zhiqing, a research leader in electrical and computer engineering at the University of Massachusetts Amherst, said: "In the past, people used transistors and capacitors to simulate synaptic behavior. These devices work, but are similar to real biological systems. The sex is very low, so the efficiency is not high, and the energy consumption is more, and the fidelity is not enough."
Studies have shown that there are about 100 billion neurons in the human brain and about 1,000 trillion synapses. Scientists have been hoping to develop brain-like computers to simulate the powerful computing power and efficiency of the human brain. Yang Zhiqing said: "The new device can simulate synapses in a more natural, more direct, and more realistic way, not only simulating a synaptic function, but also encompassing other important attributes."
In biological systems, when a nerve pulse reaches the synapse, it opens the channel, and calcium ions flow into the synapse, triggering the brain to release "neurotransmitters," which pass through the gullies between the two neurons. The pulse is passed to the next neuron.
The newly developed "diffusion memristor" consists of a cluster of silver nanoparticles embedded in a silicon oxynitride film (between two electrodes). The film is an insulator, but when an electrical pulse is applied, heat and electricity work together to cause the cluster of particles to fall apart, and the nanoparticles diffuse through the film and eventually form a conductive filament that allows current to flow from one electrode to the other. Once the voltage is removed, the temperature drops and the nanoparticles re-aggregate into clusters. The researchers say that because this process is similar to the behavior of calcium ions in biological synapses, the device mimics the short-term plasticity of neurons.
They also combined the new memristor with a drifting memristor (which relies on electric fields rather than diffusion, which is ideal for storage purposes), demonstrating a long-term plasticity of neurons - "peak-time-dependent plasticity (STDP)." Drift memristors have been used to simulate the behavior of calcium ions, but their physical processes are quite different from those of biological synapses, limiting the fidelity and diversity of simulated synaptic functions.
Small Air Hose Reel,Portable Air Hose Reel,Wall Mount Air Hose Reel,Commercial Air Hose Reel
NINGBO QIKAI ENVIRONMENTAL TECHNOLOGY CO.,LTD , https://www.water-hose-reel.com