نتایج جستجو برای: thermal cycles

تعداد نتایج: 304319  

Journal: :npj Quantum Information 2022

The optimal control of open quantum systems is a challenging task but has key role in improving existing information processing technologies. We introduce general framework based on Reinforcement Learning to discover thermodynamic cycles that maximize the power out-of-equilibrium heat engines and refrigerators. apply our method, soft actor-critic algorithm, three systems: benchmark two-level sy...

Journal: :Journal of oral science 2006
Yohei Asaka Kanako Yamaguchi Hirohiko Inage Toshiki Takamizawa Hiroyasu Kurokawa Akitomo Rikuta Takashi Kuroda Masashi Miyazaki

The purpose of this study was to clarify the effect of thermal cycling on dentin bond strengths of single-step self-etch adhesives. Five commercially available single-step self-etch systems were used. The adhesives were applied to the dentin surfaces of bovine incisors, and then light-irradiated. Resin composites were condensed into a mold and light-irradiated. Bonded specimens were divided int...

Journal: :Brazilian dental journal 2013
Francisca Neta Cruz Soares Sampaio José Renato Ribeiro Pinto Cecília Pedroso Turssi Roberta Tarkany Basting

The aim of this study was to evaluate the effect of sealer application and thermal cycling on the bond strength between tissue conditioners and acrylic resin, and to observe the type of bond failure. Two hundred eighty-eight specimens (10x16x3 mm) were made of an acrylic resin (Lucitone 500, Dentsply) using a metal muffle. Specimens were divided into four groups according to the tissue conditio...

1999
M. D. Seale E. I. Madaras

In recent years, ultrasonic methods have been developed that can measure the mechanical stiffness of composites. The Lamb wave velocity is directly related to the material parameters, so an effective method exists to ascertain the stiffness of composites by measuring the velocity of these waves. In this study, a Lamb wave measurement system was used to measure the bending and out-of-plane stiff...

2016
Seok Hong Min

In this study, thermal fatigue properties of 400 series ferritic stainless steels have been evaluated in the temperature ranges of 200-800C and 200-900C. Systematic methods for control of temperatures within the predetermined range and measurement of load applied to specimens as a function of temperature during thermal cycles have been established. Thermal fatigue tests were conducted under ful...

In the present work, we have reported the in situ oxidation of manganese (II) acetate to MnO2 nanoparticles through the thermal plasma carbonized natural hydroxyapatite (MnO2/TP-NHAp) as a neoteric sustainable method. Interestingly, the thermal plasma-processed surface of the NHAp shows a great ability for oxidation of the manganese (II) without need of any external oxidizing agents. The cataly...

2015
Themistoklis D. Kefalas Antonios G. Kladas

Three dimensional (3D), finite element (FE) models and original lumped-parameter networks are developed for the transient thermal analysis of a permanent magnet synchronous motor (PMSM) and an induction motor (IM) specifically designed and optimized for a demanding aerospace actuation application. A systematic comparison between the two different thermal modeling approaches is carried out using...

2009
D. T. Gethin

A network approach to simulating the thermal transient casting process is presented and compared with experimental data and a continuum finite element model. For a sufficiently fine network, all comparisons are good. The approach is economical on computer effort and may be used f?r a first iteration in die design. The capability to model successive casting cycles is presented, which shows the d...

2011
Narayan G. Prakash G. Prakash Narayan Mostafa H. Sharqawy John H. Lienhard Syed M. Zubair

Humidification dehumidification desalination (HDH) is a promising technology for small-scale water production applications. There are several embodiments of this technology which have been investigated by researchers around the world. However, from a previous literature review [1], we have found no study which carried out a detailed thermodynamic analysis in order to improve and/or optimize the...

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