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Model Adaptation for Prognostics in a Particle Filtering Framework
data.nasa.gov | Last Updated 2018-07-19T18:20:37.000ZOne of the key motivating factors for using particle filters for prognostics is the ability to include model parameters as part of the state vector to be estimated. This performs model adaptation in conjunction with state tracking, and thus, produces a tuned model that can used for long term predictions. This feature of particle filters works in most part due to the fact that they are not subject to the “curse of dimensionality”, i.e. the exponential growth of computational complexity with state dimension. However, in practice, this property holds for “well-designed” particle filters only as dimensionality increases. This paper explores the notion of wellness of design in the context of predicting remaining useful life for individual discharge cycles of Li-ion batteries. Prognostic metrics are used to analyze the tradeoff between different model designs and prediction performance. Results demonstrate how sensitivity analysis may be used to arrive at a well- designed prognostic model that can take advantage of the model adaptation properties of a particle filter.*
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Long-Term Pavement Performance (LTPP) - Library
datahub.transportation.gov | Last Updated 2018-12-19T00:13:52.000ZLong-term Pavement performance, construction, traffic, and environmental data for more than 2500 pavement sections in the United States and Canada. More than a dozen experimental designs address specially constructed and existing asphalt and concrete pavements, and maintenance and rehabilitation strategies. Data collection has been on-going since 1990. About one third of the pavement sections are still under study. New warm-mix asphalt concrete pavement overlay sections are currently being recruited and constructed.
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NTIS - Total investment by the Federal Government on new public-private projects (or Government- Industry projects) entered into under the Joint Venture ( JV) Authority per year
performance.commerce.gov | Last Updated 2019-07-22T17:28:38.000ZTThe indicator measures the value, in U.S. Dollars, of all new project agreements between NTIS' Joint Venture Partners (JVPs) and Federal Agencies facilitated by NTIS in a given year. By tracking the obligated values, this indicator shows the actual Federal Government investment in technology and data analytics development
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Monthly Oil Price Index FY 2001-2002
data.colorado.gov | Last Updated 2016-08-31T21:10:29.000ZMonthly Oil Price Index FY 2001-2002 as reported by the Colorado Oil & Gas Conservation Commission
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Oil and Gas Wildlife Habitat
data.colorado.gov | Last Updated 2016-08-19T17:29:45.000ZOil and Gas Wildlife Habitat as reported by the Colorado Oil & Gas Conservation Commission
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Precision Membrane Optical Shell (PMOS) Technology for RF/Microwave to Lightweight LIDAR Apertures, Phase II
data.nasa.gov | Last Updated 2018-07-19T16:02:57.000ZMembrane Optical Shell Technology (MOST) is an innovative combination of 1) very low areal density (40 to 200g/m2) optically smooth (<20 nm rms), metallic coated reflective membrane thin films, 2) advanced fabrication techniques that transform the films into self supporting shells through the introduction of permanent optically relevant double curvature, and 3) discrete active boundary control to enable rigid body alignment and maintainment of surface figure in face of environmental disturbances. Areal densities of better than 2 kg/m2 (including actuators) are projected. Current measured surface figure is ≈1 to 10 microns rms at up to the 15 cm size, and we are poised for further improvements. Demonstrated material and fabrication techniques are scaleable to at least the 2m+ diameter single surface apertures and larger apertures are possible through segmentation techniques. Proven stowage and deployment techniques enable space flight application. We propose advancing 1) the basic fabrication technology and 2) the TRL level of MOST apertures for ground and space based apertures. The key resulting innovation is implementation of low areal density, compact roll stowable approaches to realize low mass, low cost reflective apertures for RF/Microwave to LIDAR. Other NASA and DOD applications are expected as precision and aperture size increase.
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State Agency Electricity Reduction Competition Rankings (kWh): Column Chart
opendata.maryland.gov | Last Updated 2018-12-17T21:56:16.000ZTo substantially reduce energy costs and consumption by State government, an energy/electricity competition was established in 2011 between the 16 largest energy-using agencies. Each agency's consumption of electricity (kWh) and total energy (MMBTU) from significant facilities is monitored in relation to a baseline year of FY 2008. Significant facilities are those that have been occupied by the State since 2008 and are air-conditioned. An overall goal is set for State agencies to reduce energy/electricity consumption by 15% by 2015 to Lead By Example. The Fiscal Year (FY) 2013 runs from July 1, 2012 through June 30, 2013. The Fiscal Year 2014 runs from July 1, 2013 through June 30, 2014.
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Monthly Gas Price Index FY 2005-2006
data.colorado.gov | Last Updated 2016-08-18T15:57:30.000ZMonthly Gas Price Index FY 2005-2006 as reported by the Colorado Oil & Gas Conservation Commission
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A Low-Power Medical Oxygen Generator, Phase II
data.nasa.gov | Last Updated 2018-07-19T08:09:47.000ZAn on-board oxygen concentrator is required during long duration manned space missions to supply medical oxygen. The commercial medical oxygen generators based on pressure swing adsorption (PSA) are large and highly power intensive. TDA Research, Inc. (TDA) proposes to develop a small, lightweight, portable oxygen generator based on a vacuum swing adsorption (VSA) to produce concentrated medical oxygen. The unit uses ambient vehicle cabin air as the feed and delivers high purity oxygen while meeting NASA's requirements for high flow capacity, closed-loop tissue oxygen control and operation in microgravity/partial gravity. TDA's VSA system uses a modified version of the lithium exchanged low silica X zeolite (Li-LSX), a state-of-the-art air separation sorbent extensively used in commercial Portable Oxygen Concentrators (POCs) to enhance the N2 adsorption capacity. In Phase I, we demonstrated the scientific, technical, and commercial feasibility of the oxygen concentrator module (OCM). In Phase II, we will develop a higher fidelity prototype with an adjustable pressure output to produce 2-15 lpm of O2 at 50% to +90% purity from ambient cabin air. The OCM will be capable of self-regulating the oxygenation of the patient using a closed loop feedback system that senses tissue oxygenation level. We will evaluate the sorbent performance in a breadboard bench-scale prototype under simulated microgravity/partial gravity exploration atmospheres and carry out a 1,500 hr longevity test (at a minimum) to determine its mechanical durability. Based on the experimental results, we will design a prototype unit that will meet all of NASA's requirements (e.g., low power draw over the range of flows and oxygen levels, lightweight and volume), while delivering the desired oxygen flow and purity.
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Titan Montgolfiere Terrestrial Test Bed, Phase II
data.nasa.gov | Last Updated 2018-07-19T09:06:28.000ZWith the Titan Saturn System Mission, NASA is proposing to send a Montgolfiere balloon to probe the atmosphere of Titan. To better plan this mission and create a robust optimized balloon design, NASA requires the ability to more accurately evaluate the convective heat transfer characteristics of the balloon operating in Titan's atmosphere. Based on limitations of previous efforts, NASA has requested proposals for a testbed to support CFD validation. Leveraging the results of the Phase I effort, Near Space Corporation (NSC), proposes to develop and operate two full scale Testbeds (~9 m diameter) in order to help validate CFD models for the TSSM Titan Montgolfiere balloon. The Testbeds will incorporate new envelope design innovations and state-of-the-art data acquisition methods to enable data intensive tethered and free-flight tests. Utilizing its unique balloon facility located in a large blimp hangar, NSC will conduct iterative tethered hangar tests of the full scale Testbeds (which is not possible in existing cryogenic test chambers). These flights will enable better IR imaging and flow characterization measurements. The acquired data will provide critical input to incrementally improve and validate the CFD models. The outdoor drop/inflation test and a free flight test will retire technology risks associated with the future Titan mission in addition to generating the validation data necessary to improve the existing CFD models. NSC proposes to develop and operate a mature TMTT system during Phase II, generate pertinent data that will be used to improve the CFD models, and leverage the effort to create valuable technology with both NASA and non-NASA commercial applications.