Results 81 to 90 of about 1,807,508 (248)

Investigation of resided water effects on PEM fuel cell after cold start

open access: yes, 2007
The effects of the residual water in the PEM fuel cell after cold start on the performance, electrode electrochemical characteristics, and cell components were investigated by controlling the cold-start processes of three cells at -5 degrees C.
Yu, Hongmei   +7 more
core   +1 more source

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

open access: yesAdvanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth   +6 more
wiley   +1 more source

Enhancing the flexibility and safety of electric-resistance heating on thick-walled pressure parts of utility boilers in coal-fired power plants

open access: yesCase Studies in Thermal Engineering
In this paper, a method for electric-resistance heating is proposed to reduce the thermal stress generated at a thick-walled pressure component during cold start-up in a coal-fired utility boiler.
Zhiwen Hou   +6 more
doaj   +1 more source

Representation Learning for cold-start recommendation

open access: yes, 2014
A standard approach to Collaborative Filtering (CF), i.e. prediction of user ratings on items, relies on Matrix Factorization techniques. Representations for both users and items are computed from the observed ratings and used for prediction. Unfortunatly, these transductive approaches cannot handle the case of new users arriving in the system, with no
Contardo, Gabriella   +2 more
openaire   +4 more sources

Electrochemical Behavior of Flame‐Sprayed Sc‐Doped AlCoCrFeMo High‐Entropy Alloy Coatings in 3.5% Sodium Chloride Solution

open access: yesAdvanced Engineering Materials, EarlyView.
Scandium (Sc)‐doped AlCoCrFeMo HEA coatings are fabricated via flame spraying with 0.1, 0.3, and 0.5 wt% Sc additions. Among these, the HEA‐Sc0.3 coating exhibits the highest corrosion resistance, indicated by a more positive corrosion potential and lower current density.
Pankaj Kumar   +7 more
wiley   +1 more source

Strategy of “Cold Start” of New Academic Laboratories

open access: yesУправленческое консультирование, 2019
The Ministry of Science and Higher Education of the Russian Federation to attract young promising personnel to research activities at the end of 2018, an additional budget was set up, aimed at creating new research laboratories in academic institutions ...
A. L. Ronzhin
doaj   +1 more source

Cold-start playlist recommendation with multitask learning [PDF]

open access: yes, 2018
Playlist recommendation involves producing a set of songs that a user might enjoy. We investigate this problem in three cold-start scenarios: (i) cold playlists, where we recommend songs to form new personalised playlists for an existing user; (ii) cold users, where we recommend songs to form new playlists for a new user; and (iii) cold songs, where we
Dawei Chen   +2 more
openaire   +3 more sources

Impact of MgO Additions on the Oxidation Resistance and Compression Behavior of Vanadium Alloys

open access: yesAdvanced Engineering Materials, EarlyView.
An increase in oxidation resistance at 600 °C is achieved for alloys containing more than 2.5 wt.% MgO. It has been established that, along with V2O5, MgO6V2, and Mg2O7V2 are formed, which are presumed to enhance oxidative stability. Furthermore, the possible transformation of Mg‐vanadates through reaction with CO2, which presumably occurs in this ...
Ievgen Solodkyi   +5 more
wiley   +1 more source

Optimization of Linear Loading Strategy for Fuel Cell Initiation Based on Gaussian Process Regression Model

open access: yesElectrochemistry
This paper developed a one-dimensional multiphase model to analyze the cold start behavior of fuel cell, focusing on the effects of various parameters such as loading rates, maximum loading current densities, and coolant flow rates.
Jianbin SU   +4 more
doaj   +1 more source

Cold & Warm Net: Addressing Cold-Start Users in Recommender Systems

open access: yes, 2023
Cold-start recommendation is one of the major challenges faced by recommender systems (RS). Herein, we focus on the user cold-start problem. Recently, methods utilizing side information or meta-learning have been used to model cold-start users.
Tan, Xianfeng   +4 more
core  

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