Results 11 to 20 of about 2,199,245 (317)
Energy Conversion and Conservation Technology in Facing Net Zero-Emission Conditions and Supporting National Defense [PDF]
, 2022 Conversion technology is a solution that was born to solve energy problems and human needs. Without energy, all human activities ranging from households and jobs to the industry cannot work as they should, but energy conversion that uses conventional ...
Idris, Abdi Manab +2 more
core +1 more source
Arbitrary Conditional Distributions with Energy
CoRR, 2021 Modeling distributions of covariates, or density estimation, is a core challenge in unsupervised learning. However, the majority of work only considers the joint distribution, which has limited utility in practical situations. A more general and useful problem is arbitrary conditional density estimation, which aims to model any possible conditional ...
Ryan R. Strauss, Junier B. Oliva
openaire +3 more sources
The Smeared Null Energy Condition [PDF]
Journal of High Energy Physics, 2018 Abstract We propose a new bound on a weighted average of the null energy along a finite portion of a null geodesic: the Smeared Null Energy Condition (SNEC). We believe our bound is valid on scales small compared to the radius of curvature in any quantum field theory that is consistently coupled to gravity.
Freivogel, B., Krommydas, D.
openaire +6 more sources
Observational Constraints and Some Toy Models in f(Q) Gravity with Bulk Viscous Fluid
Universe, 2022 The standard formulation of general relativity fails to describe some recent interests in the universe. It impels us to go beyond the standard formulation of gravity.
Sanjay Mandal +2 more
doaj +1 more source
Inbreeding, energy use and condition [PDF]
Journal of Evolutionary Biology, 2009 AbstractIn energetic terms, fitness may be seen to be dependent on successful allocation of energy between life‐history traits. In addition, fitness will be constrained by the energy allocation ability, which has also been defined as condition. We suggest here that the allocation ability, estimated as the difference between total energy budget and ...
T, Ketola, J S, Kotiaho
openaire +2 more sources
Wormholes without exotic matter in nonminimal torsion-matter coupling f(T) gravity
上海师范大学学报. 自然科学版, 2023 Wormholes are hypothetical tunnels that connect remote parts of spacetime. In General Relativity, wormholes are threaded by exotic matter that violates the energy conditions.
YANG Jing, LIN Ruihui, ZHAI Xianghua
doaj +1 more source
Bulk Viscous Fluid in Symmetric Teleparallel Cosmology: Theory versus Experiment
Universe, 2022 The standard formulation of General Relativity Theory, in the absence of a cosmological constant, is unable to explain the responsible mechanism for the observed late-time cosmic acceleration.
Raja Solanki +3 more
doaj +1 more source
`Operational' energy conditions [PDF]
Classical and Quantum Gravity, 1998 I show that a quantized Klein-Gordon field in Minkowski space obeys an `operational' weak energy condition: the energy of an isolated device constructed to measure or trap the energy in a region, plus the energy it measures or traps, cannot be negative.
openaire +2 more sources
The National Energy Technology Laboratory Annual Site Environmental Report for Calendar Year 2000 [PDF]
, 2001 This Site Environmental Report was prepared by the Environment, Safety, and Health Division at the National Energy Technology Laboratory (NETL) for the U.S. Department of Energy. The purpose of this report is to inform the public and Department of Energy
National Energy Technology Laboratory (U.S.)
core +1 more source
ENERGY CONDITIONS AND THEIR COSMOLOGICAL IMPLICATIONS [PDF]
COSMO-99, 2000 The energy conditions of general relativity permit one to deduce very powerful and general theorems about the behaviour of strong gravitational fields and cosmological geometries. However, the energy conditions these theorems are based on are beginning to look a lot less secure than they once seemed: (1) there are subtle quantum effects that violate ...
Visser, Matt, Barcelo, Carlos
openaire +2 more sources