Results 91 to 100 of about 3,557,380 (389)

Optimizing thermodynamic trajectories using evolutionary and gradient-based reinforcement learning [PDF]

, 2019
Using a model heat engine, we show that neural network-based reinforcement learning can identify thermodynamic trajectories of maximal efficiency. We consider both gradient and gradient-free reinforcement learning.
Beeler, Chris, Coles, Rory, Mills, Kyle, Tamblyn, Isaac, Whitelam, Stephen, Yahorau, Uladzimir   +5 more
core  

The Structural Refinement of Commercial‐Purity Copper Processed by Equal Channel Angular Pressing with Low Strain Amplitude

Advanced Engineering Materials, EarlyView.
Equal channel angular pressing of commercial pure copper under low strain amplitude (≈0.48) induces concurrent continuous and localized discontinuous dynamic recrystallization, forming a duplex structure influenced by strain heterogeneity and recovery. Moderate hardening after 4–12 passes results from progressive high‐angle grain boundary formation via
Paula Cibely Alves Flausino, Nayara A. N. da Silva, Bárbara C. de Almeida, Taise M. Manhabosco, Elaine C. S. Corrêa, Maria T. P. Aguilar, Paulo R. Cetlin   +6 more
wiley   +1 more source

Design of Multiphase Compositionally Complex Alloys for Enhanced Hardness at Elevated Temperatures and Machinability: Comparative Study with Inconel 718

Advanced Engineering Materials, EarlyView.
This study compares the mechanical properties of Inconel 718 with two newly developed compositionally complex alloys (CCAs). Inco‐like‐H alloy demonstrates significantly improved wear resistance, surface finish, and hardness, notably at high temperatures. This CCA requires no heat treatment and is well suited for additive manufacturing. Its performance
Laurent Peltier, Gaël Le Coz, Fodil Meraghni, Jérome Slowensky   +3 more
wiley   +1 more source

Performance Analysis of Wave Rotor Combustor Integration into Baseline Engines: A Comparative Study of Pressure-Gain and Work Cycles

Energies
This study presents two concepts for integrating a wave rotor combustor (WRC) into a baseline engine: the wave rotor pressure-gain cycle (WRPGC) and the wave rotor work cycle (WRWC).
Renchuan Zheng, Erlei Gong, Jianzhong Li, Qian Yao, Zhaolong Nie   +4 more
doaj   +1 more source

Surface Modification of Fluorine‐Free Superhydrophobic Materials with (Ultra‐)Thin TiO2 Layers

Advanced Engineering Materials, EarlyView.
Significant changes in wettability, with a reduction of 60o in the water conduct angle, are reported via the surface modification of fluorine‐free superhydrophobic thin films, prepared by aerosol‐assisted chemical vapor deposition, after coating a 4 nm layer of titanium dioxide on the surface using atomic layer deposition.
Julie Jalila Kalmoni, Chris Blackman, Claire J Carmalt   +2 more
wiley   +1 more source

Direct Recycling of Cold Work Tool Steel Swarf into New Cutting Disks via Field‐Assisted Sintering

Advanced Engineering Materials, EarlyView.
Through a sintering method known as field‐assisted sintering technology/spark plasma sintering, cold work tool steel swarf can be directly recycled into new cutting disks. This method is capable of densifying the unconventional powder morphology of swarf, and it can also seal grinding contaminants, such as Al2O3, into the steel matrix.
Monica Keszler, Felix Großwendt, Olivier Guillon, Sebastian Weber, Martin Bram   +4 more
wiley   +1 more source

Some features of bypass engine operation process with separate exhaust nozzles

Научный вестник МГТУ ГА, 2016
In the article some equations are derived to establish the relationships between the thermodynamic cycle parameters applying to bypass engines with separate exhaust nozzles. Necessary calculations are made and the main dependences are analyzed.
V. V. Medvedev, V. T. Shulekin
doaj  

Computer program for thermodynamic analysis of open-cycle multishaft power system [PDF]

, 1975
Program computes specific power output, specific fuel consumption, and cycle efficiency for power systems having any number os shafts up to maximum of five.
Glassman, A. J.
core   +1 more source

Improved Strength and Corrosion Resistance of Ti–50Zr Alloy Through Heat Treatment

Advanced Engineering Materials, EarlyView.
This work systematically analyzes the effects of heat treatment on mechanical properties and corrosion behavior of Ti‐50Zr alloy produced via vacuum arc melting. Microstructure transforms from coarse lamellar α phase in as‐cast condition to fine and uniformly distributes acicular α′ phase in heat‐treatment state.
Yuhua Li, Qian Zhang, Rong Zhao, Haojie Wang, Yujing Liu, Zibo Zhao, Chengliang Yang, Lai‐Chang Zhang   +7 more
wiley   +1 more source

Evaluation of the Energy Efficiency of the Stage Compression Heat Pump Cycle

Известия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2019
The increase in production and modernization of existing heat pumps are global trends in the development and implementation of heat pump technology. Application of refrigerant with zero potential ozone depletion relative to fluorinetrichloromethane and ...
S. K. Abildinova, R. A. Musabekov, A. S. Rasmukhametova, S. V. Chicherin   +3 more
doaj   +1 more source