SEARCH · Engineering Papers
Results for “design considerations”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Design Considerations for GPU-based Mixed Integer Programming on Parallel Computing Platforms
Mixed Integer Programming (MIP) is a powerful abstraction in combinatorial optimization that finds real-life application across many significant sectors. The recent proliferation of graphical processing unit (GPU)-based accelerated computing architectures in large-scale parallel computing or supercomputing presents new opportunities as well as challenges in the advancement of MIP solver technology to effectively use the new accelerated computing platforms and scale to large parallel systems. Here, we recount the conventional processor-based strategies and focus on configurations where the most promising intersection lies between parallel MIP solver approaches and the specific strengths of accelerated parallel platforms. We note that the best potential lies in solving problems whose individual matrix sizes (of the linear program relaxation) fit entirely within one accelerator's memory and whose branch-and-bound (or branch-and-cut) trees cannot be fully contained within a small number of computational nodes. Additionally, we identify ideal features of computational linear algebra support on GPU accelerators that would help advance this direction of scalable parallel solution of MIP problems on GPU-based accelerated computing architectures.
Design Considerations for an all III-Nitride Thyristor Structure
Explore the source record for details and available documents.
MARTIAN ENTRY CAPSULE- DESIGN CONSIDERATIONS FOR TERMINAL DECELERATION
Retardation system for capsule entering martian atmosphere
Thrust-measurement stand design consideration
Explore the source record for details and available documents.
Some design considerations, large expulsion bladders for nitrogen tetroxide and hydrazine
Chemical compatibility, permeation, and fuel tank bladder collapse considered for Advanced Liquid Propulsion System /ALPS/
Orbital operations study - A triadic decimal digit printer-reader unit, preliminary design considerations Technical report no. 6
Triadic digit reader and printer for automatic data processing system
Some design considerations for adhesive bonding
Engineering techniques for metal-to-metal and sandwich adhesive bonding
Some design considerations for planetary relay communications satellites.
Items affecting information transmitted from payload landed on remote planet to Earth via communications satellite including orbit, transmission policy and orbit injection error effect on communication capability
Some design considerations for planetary relay communications satellites.
Items affecting information transmitted from payload landed on remote planet to earth via communications satellite including orbit, transmission policy and orbit injection error effect on communication capability
Design considerations in PCM transmission of low-resolution monochrome still pictures.
Picture quality in PCM transmission of low resolution monochrome still pictures as affected by system parameter changes
Design considerations for orbital transport systems.
Earth-orbital transport systems noting configurations, cost, capabilities, operational requirements, etc
Voyager capsule engine system design considerations single versus multiple engine configuration
Single versus multiple engine configurations for Voyager capsule bus propulsion
Design considerations for cyclotron resonance oscillators
Cyclotron resonance oscillators as sources of millimeter waves
Design considerations and requirements for integrating an electric propulsion system into the SERT II and future spacecraft
Electric propulsion systems integration into SERT 2 spacecraft, discussing launch imposed environment, thrust vector control, thrustor breakdown, power conditioning, etc
Gear design considerations
This paper discusses the parameters of gears and gear lubrication that affect wear, pitting, and scoring. Formulas for sliding and rolling velocities and for relative radii of profile and lengthwise curvatures between gear teeth are listed. The effects of load sharing between teeth are considered, and formulas for contact stress are developed. The duration of tooth contact and the variation in coefficient of friction are considered. The aspects of oil film thickness and critical temperatures are presented in relation to gear tooth wear and scoring. A discussion of gear testing and simulated gear testing by means of rollers emphasizes the advantages of each.
Design considerations for an orbital nonpropulsive vent system
Orbital nonpropulsive vent system to remove excess or residual propellant vapors and waste gases with minimum impulse imbalances imparted to vehicle