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31 results about "Neuronal Transmission" patented technology

Any process in which a presynaptic cell transfers a signal to a postsynaptic cell, by either release of a neurotransmitter or by passage of an electrical current via specialized channels. This process is essential to all neuronal functions.

Systems and methods for phase measurements

Preferred embodiments of the present invention are directed to systems for phase measurement which address the problem of phase noise using combinations of a number of strategies including, but not limited to, common-path interferometry, phase referencing, active stabilization and differential measurement. Embodiment are directed to optical devices for imaging small biological objects with light. These embodiments can be applied to the fields of, for example, cellular physiology and neuroscience. These preferred embodiments are based on principles of phase measurements and imaging technologies. The scientific motivation for using phase measurements and imaging technologies is derived from, for example, cellular biology at the sub-micron level which can include, without limitation, imaging origins of dysplasia, cellular communication, neuronal transmission and implementation of the genetic code. The structure and dynamics of sub-cellular constituents cannot be currently studied in their native state using the existing methods and technologies including, for example, x-ray and neutron scattering. In contrast, light based techniques with nanometer resolution enable the cellular machinery to be studied in its native state. Thus, preferred embodiments of the present invention include systems based on principles of interferometry and/or phase measurements and are used to study cellular physiology. These systems include principles of low coherence interferometry (LCI) using optical interferometers to measure phase, or light scattering spectroscopy (LSS) wherein interference within the cellular components themselves is used, or in the alternative the principles of LCI and LSS can be combined to result in systems of the present invention.
Owner:MASSACHUSETTS INST OF TECH

Systems and methods for phase measurements

Preferred embodiments of the present invention are directed to systems for phase measurement which address the problem of phase noise using combinations of a number of strategies including, but not limited to, common-path interferometry, phase referencing, active stabilization and differential measurement. Embodiment are directed to optical devices for imaging small biological objects with light. These embodiments can be applied to the fields of, for example, cellular physiology and neuroscience. These preferred embodiments are based on principles of phase measurements and imaging technologies. The scientific motivation for using phase measurements and imaging technologies is derived from, for example, cellular biology at the sub-micron level which can include, without limitation, imaging origins of dysplasia, cellular communication, neuronal transmission and implementation of the genetic code. The structure and dynamics of sub-cellular constituents cannot be currently studied in their native state using the existing methods and technologies including, for example, x-ray and neutron scattering. In contrast, light based techniques with nanometer resolution enable the cellular machinery to be studied in its native state. Thus, preferred embodiments of the present invention include systems based on principles of interferometry and/or phase measurements and are used to study cellular physiology. These systems include principles of low coherence interferometry (LCI) using optical interferometers to measure phase, or light scattering spectroscopy (LSS) wherein interference within the cellular components themselves is used, or in the alternative the principles of LCI and LSS can be combined to result in systems of the present invention.
Owner:MASSACHUSETTS INST OF TECH

Systems and methods for phase measurements

Preferred embodiments of the present invention are directed to systems for phase measurement which address the problem of phase noise using combinations of a number of strategies including, but not limited to, common-path interferometry, phase referencing, active stabilization and differential measurement. Embodiment are directed to optical devices for imaging small biological objects with light. These embodiments can be applied to the fields of, for example, cellular physiology and neuroscience. These preferred embodiments are based on principles of phase measurements and imaging technologies. The scientific motivation for using phase measurements and imaging technologies is derived from, for example, cellular biology at the sub-micron level which can include, without limitation, imaging origins of dysplasia, cellular communication, neuronal transmission and implementation of the genetic code. The structure and dynamics of sub-cellular constituents cannot be currently studied in their native state using the existing methods and technologies including, for example, x-ray and neutron scattering. In contrast, light based techniques with nanometer resolution enable the cellular machinery to be studied in its native state. Thus, preferred embodiments of the present invention include systems based on principles of interferometry and / or phase measurements and are used to study cellular physiology. These systems include principles of low coherence interferometry (LCI) using optical interferometers to measure phase, or light scattering spectroscopy (LSS) wherein interference within the cellular components themselves is used, or in the alternative the principles of LCI and LSS can be combined to result in systems of the present invention.
Owner:MASSACHUSETTS INST OF TECH

Systems and methods for phase measurements

Preferred embodiments of the present invention are directed to systems for phase measurement which address the problem of phase noise using combinations of a number of strategies including, but not limited to, common-path interferometry, phase referencing, active stabilization and differential measurement. Embodiment are directed to optical devices for imaging small biological objects with light. These embodiments can be applied to the fields of, for example, cellular physiology and neuroscience. These preferred embodiments are based on principles of phase measurements and imaging technologies. The scientific motivation for using phase measurements and imaging technologies is derived from, for example, cellular biology at the sub-micron level which can include, without limitation, imaging origins of dysplasia, cellular communication, neuronal transmission and implementation of the genetic code. The structure and dynamics of sub-cellular constituents cannot be currently studied in their native state using the existing methods and technologies including, for example, x-ray and neutron scattering. In contrast, light based techniques with nanometer resolution enable the cellular machinery to be studied in its native state. Thus, preferred embodiments of the present invention include systems based on principles of interferometry and / or phase measurements and are used to study cellular physiology. These systems include principles of low coherence interferometry (LCI) using optical interferometers to measure phase, or light scattering spectroscopy (LSS) wherein interference within the cellular components themselves is used, or in the alternative the principles of LCI and LSS can be combined to result in systems of the present invention.
Owner:MASSACHUSETTS INST OF TECH

System and method for measuring phase

Preferred embodiments of the present invention are directed to systems for phase measurement which address the problem of phase noise using combinations of a number of strategies including, but not limited to, common-path interferometry, phase referencing, active stabilization and differential measurement. Embodiment are directed to optical devices for imaging small biological objects with light. These embodiments can be applied to the fields of, for example, cellular physiology and neuroscience. These preferred embodiments are based on principles of phase measurements and imaging technologies. The scientific motivation for using phase measurements and imaging technologies is derived from, for example, cellular biology at the sub-micron level which can include, without limitation, imaging origins of dysplasia, cellular communication, neuronal transmission and implementation of the genetic code. The structure and dynamics of sub-cellular constituents cannot be currently studied in their native state using the existing methods and technologies including, for example, x-ray and neutron scattering. In contrast, light based techniques with nanometer resolution enable the cellular machinery to be studied in its native state. Thus, preferred embodiments of the present invention include systems based on principles of interferometry and/or phase measurements and are used to study cellular physiology. These systems include principles of low coherence interferometry (LCI) using optical interferometers to measure phase, or light scattering spectroscopy (LSS) wherein interference within the cellular components themselves is used, or in the alternative the principles of LCI and LSS can be combined to result in systems of the present invention.
Owner:MASSACHUSETTS INST OF TECH

Artificial neural network with hardware training and hardware refresh

InactiveUS6513023B1Intuitive accuracyAdvantage of speed simplicityDigital computer detailsDigital dataNerve networkAudio power amplifier
A neural network circuit is provided having a plurality of circuits capable of charge storage. Also provided is a plurality of circuits each coupled to at least one of the plurality of charge storage circuits and constructed to generate an output in accordance with a neuron transfer function. Each of a plurality of circuits is coupled to one of the plurality of neuron transfer function circuits and constructed to generate a derivative of the output. A weight update circuit updates the charge storage circuits based upon output from the plurality of transfer function circuits and output from the plurality of derivative circuits. In preferred embodiments, separate training and validation networks share the same set of charge storage circuits and may operate concurrently. The validation network has a separate transfer function circuits each being coupled to the charge storage circuits so as to replicate the training network's coupling of the plurality of charge storage to the plurality of transfer function circuits. The plurality of transfer function circuits may be constructed each having a transconductance amplifier providing differential currents combined to provide an output in accordance with a transfer function. The derivative circuits may have a circuit constructed to generate a biased differential currents combined so as to provide the derivative of the transfer function.
Owner:NAT AERONAUTICS & SPACE ADMINISTATION U S GOVERNMENT AS REPRESENTED BY THE ADMINISTATOR OF THE

Neural network unit circuit based on memristor bridge synapses

The invention discloses a neural network unit circuit based on a memristor bridge synapse, and the neural network unit circuit comprises a memristor weight circuit which is used for weighting a voltage signal transmitted by an upper-level neuron and transmitting the voltage signal downwards; a differential amplification circuit which is used for converting the voltage signal transmitted by the synapse into a current signal; and a current mirror circuit which is used for adding and summarizing the current signals transmitted by the synapses and transmitting the current signals to the next stageof neurons. The invention aims to solve the problems that a transistor-based hardware neural network is high in power consumption and large in size, and a neural network circuit based on a memristorarray is low in fault tolerance is solved. The memristor bridge composed of five memristors is used for simulating synapses in neurons, the differential amplification circuit is used for simulating axons of the neurons, the current mirror circuit is used for simulating dendrites of the neurons, the three parts play a role in signal weighting, voltage-current conversion, current accumulation and cascade voltage output respectively, and a neural network unit circuit is completely achieved.
Owner:NANJING UNIV OF POSTS & TELECOMM

System and method for measuring phase

Preferred embodiments of the present invention are directed to systems for phase measurement which address the problem of phase noise using combinations of a number of strategies including, but not limited to, common-path interferometry, phase referencing, active stabilization and differential measurement. Embodiment are directed to optical devices for imaging small biological objects with light.These embodiments can be applied to the fields of, for example, cellular physiology and neuroscience. These preferred embodiments are based on principles of phase measurements and imaging technologies. The scientific motivation for using phase measurements and imaging technologies is derived from, for example, cellular biology at the sub-micron level which can include, without limitation, imagingorigins of dysplasia, cellular communication, neuronal transmission and implementation of the genetic code. The structure and dynamics of sub-cellular constituents cannot be currently studied in theirnative state using the existing methods and technologies including, for example, x-ray and neutron scattering. In contrast, light based techniques with nanometer resolution enable the cellular machinery to be studied in its native state. Thus, preferred embodiments of the present invention include systems based on principles of interferometry and / or phase measurements and are used to study cellular physiology. These systems include principles of low coherence interferometry (LCI) using optical interferometers to measure phase, or light scattering spectroscopy (LSS) wherein interference withinthe cellular components themselves is used, or in the alternative the principles of LCI and LSS can be combined to result in systems of the present invention.
Owner:MASSACHUSETTS INST OF TECH

A two-dimensional material heterojunction memristor and its preparation method

The invention belongs to the field of microelectronic technology, and discloses a two-dimensional material heterojunction memristor and a preparation method thereof. The memristor includes a substrate, a bottom electrode layer, and a two-dimensional material heterojunction layer from bottom to top And the top electrode layer, wherein, the two-dimensional material heterojunction layer is used as the intermediate dielectric layer, which is a two-layer laminated structure composed of two different metal sulfur compounds, and each layer in the laminated structure corresponds to one of the metal sulfur compounds. The present invention improves the key functional layer materials used in the device and the overall structure design of the device. Compared with the prior art, a new type of memristor is constructed entirely based on two-dimensional materials, which subverts the traditional MIM structure and has a lower The working voltage, fatigue resistance and cycle stability characteristics of the memristor; moreover, the memristor shows a high degree of similarity to the synapse transmission information in the simulated neuron transmission information, and has great application in the development of brain-like structures in the future prospect.
Owner:HUAZHONG UNIV OF SCI & TECH

A target recognition method, device, system and computer-readable storage medium

The invention discloses a target recognition method, device, system and computer-readable storage medium. The method includes the following steps: acquiring original pulse data, determining a pulse sampling window, inputting pulses in the pulse sampling window to a pulse neural network, and The pulses of the spiking neural network are mapped, and the pulses are sequentially transmitted along the excitation neurons of each layer other than the last layer of excitation neurons, the pulses are transmitted along the last layer of excitation neurons to the inference layer, and the pulses are transmitted along the last layer of reasoning neurons. The reasoning neurons of each layer are transmitted sequentially to determine the recognition result; the device includes a pulse acquisition module, a sampling window module, a pulse mapping module, a neuron excitation module, a neuron reasoning module and a recognition result determination module; the system includes the above-mentioned device; The invention can realize accurate recognition and fast recognition of the target to be recognized, and can be better applied to the target with high moving speed, and can give consideration to both recognition accuracy and calculation amount.
Owner:SPIKE VISION (BEIJING) TECHNOLOGY CO LTD
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