Electrical, Electronics, and Avionics

Neural networks

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Briefs: Medical
A diagnostic software system (DSS) now under development is intended to implement artificial neural networks (ANNs) that will analyze magnetoencephalographic (MEG) data to locate foci...
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Briefs: Information Technology
A method of semi- automated ident- ification of biomaterials, now under development, is based on the use of a combination of neural-network and of self-...
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Briefs: Electronics & Computers
A scheme for organizing and controlling sensor webs is based on artificial neural networks. [Sensor webs were described in “Sensor Webs” (NPO-20616), NASA Tech Briefs, Vol. 23, No. 10...
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Briefs: Physical Sciences
Software for Electromagnetic Detection of Buried Explosives
U-HUNTER (also called “UXOHUNTER”) is a computer program that affords knowledge-based real-time sensor- fusion and display capabilities for detecting buried objects and materials of interest. U-HUNTER is intended especially for inferring the presence of buried unexploded ordnance and...
Briefs: Information Technology
Physical Model of Immune-Inspired Computing
A mathematical model that represents several physical and mental behaviors has been developed to enable the phenomenological description of basic functions of immune systems. This development is part of a continuing effort to improve the autonomy of robots and spacecraft by use of computational methods...
Briefs: Medical
Mathematical Model of a Quantum Decision Maker
A mathematical model of a quantum analog-computing device that would simulate the human decision-making process has been developed. Like the immune-inspired- computing model described in the preceding article, this model is intended to contribute to improvement in the autonomy of robots and spacecraft.
Briefs: Electronics & Computers
A coder/decoder system (codec) is being developed for use in a digital voice communication system in which speech is encoded as a series of frames of data and transmitted over a noisy or lossy channel. Called a...
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Briefs: Electronics & Computers
Reusable Software for Autonomous Diagnosis of Complex Systems
A software system designed to provide a purely signal-based diagnosis of virtually any time-varying system has been developed. This software is part of an overall concept called “Beacon-based Exception Analysis for Multimissions,” or BEAM. This concept provides for real-time...
Briefs: Data Acquisition
High-Performance Processor of Hyperspectral Images
The Remote Sensing Hyperspectral Engine (RSHE) is a special-purpose, portable computer that performs high-performance processing of hyperspectral image data collected by a remote-sensing optoelectronic apparatus. Typically, the remote-sensing apparatus is airborne or spaceborne, the images are of...
Briefs: Electronics & Computers
An analog very-large-scale integrated (VLSI) circuit was designed and built to implement Hebbian synapses with an improved method of modifying and storing the synaptic weights, for...
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Briefs: Electronics & Computers
Analog electronic circuits that operate with pulsed input and output signals are undergoing development. The pulsing behavior of these circuits is modeled after a similar behavior, called...
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Briefs: Information Technology
Cascade error projection (CEP) is an improved learning algorithm for artificial neural networks. CEP is reliable and suitable for efficient implementation in very-large-scale integrated...
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Briefs: Mechanical & Fluid Systems
An important secondary topic addressed in the research and development effort described in the preceding article is the use of artificial neural networks to improve the monitoring and...
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Briefs: Information Technology
A method of processing of time-series data from sensors that monitor a dynamic physical system has been devised to enable detection of anomalies in the dynamics. The method involves computing...
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Briefs: Motion Control
Myoelectric Teleoperation for Robotics and Prosthetics
Johnson Space Center is sponsoring continuing research on the use of myoelectric signals to control dexterous robotic and prosthetic hands. This research is expected to advance the state of the art beyond that of today's most common, commercially available, myoelectrically controlled...
Briefs: Electronics & Computers
The figure schematically depicts a flow-measurement system based on an acoustic sensor mounted on a pipe, along which flows a single or two-phase fluid. The electrical output of the...
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Briefs: Electronics & Computers
Locally Connected Neural Networks for Pattern Recognition
Neural networks of a proposed type would be formed with computational units called "neuromorphs" attached in a locally connected array. These neural networks would achieve pattern recognition invariant under rotation and translation by exploiting a combination of network symmetry and...
Briefs: Physical Sciences
Software To Detect Malfunctions in Anesthesia Equipment
To reduce response times and save lives in operating rooms, community trauma centers, and remote combat care facilities, a team of scientists working on behalf of Lyndon B. Johnson Space Center (JSC) has developed an artificial-intelligence alarm-management software system that detects...
Briefs: Medical
A developmental noninvasive method of determining the concentration of glucose in blood is based on (1) the acquisition of a near-infrared (NIR) Raman spectrum from the aqueous humor of...
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Briefs: Motion Control
The gaseous hydrogen flow control vale (GH2FCV; see Figure 1) is a critical space shuttle component that controls the pressure of the hydrogen external tank during launch and ascent to...
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Briefs: Electronics & Computers
A versatile, ultrafast, low-power machine vision system in the form of a single integrated-circuit chip has been proposed for use in military targeting, industrial robotics, and other...
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Briefs: Photonics/Optics
Robot Would Inspect Hanging Cables
A proposed automated apparatus would travel along a hanging cable, optically inspecting it all around. The proposal was made to eliminate lowering human inspectors in baskets along emergency-egress slidewires at Kennedy Space Center launch pads. The apparatus would include a motor drive system, a video camera...
Briefs: Robotics, Automation & Control
A six-legged robot resembling an insect and a legless segmented robot resembling a worm (see figure) have been proposed as prototypes of biomorphic explorers  small, mobile, exploratory robots that...
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Briefs: Information Technology
A method of computational simulation of the aerodynamic- or hydrodynamic-flow performance features of objects involves the use of neural-network mathematical models implemented in computer...
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Briefs: Mechanical & Fluid Systems
Structural Analysis/Design (STRAND) and Neural Net Computation (NETCOM) are developmental modular computer programs that exploit the speedup afforded by parallel and neural-network...
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Briefs: RF & Microwave Electronics
Program Computes Flightpaths From Point Radar Sightings
A computer program estimates great-circle-arc (GARC) flightpaths of multiple aircraft, given time-tagged point locations from radar sightings of the aircraft. The problem of generating such estimates is called a "clustering" problem, and is solved in this instance by use of a neural-network...
Briefs: Electronics & Computers
An application-specific integrated circuit (ASIC) has been developed as a prototype of neuroprocessors for real-time diagnosis and control of automotive engines. The application of this...
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Briefs: Electronics & Computers
An electronic engine-health-monitoring system is based on (1) computation of frequency-phase-normalized (FPN) spectra from the digitized outputs of vibration sensors and (2) the use of...
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Briefs: Electronics & Computers
A proposed improved code-division multiple-access (CDMA) detector would achieve high resistance to jamming of weak ("far") received signals by strong ("near") ones. The problem of such...
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