نتایج جستجو برای: state phase transformation
تعداد نتایج: 1586823 فیلتر نتایج به سال:
In this work, an initial state iterative learning control (ILC) approach is proposed for final state control of motion systems. ILC is applied to learn the desired initial states in the presence of system uncertainties. Four cases are considered where the initial position or speed are manipulated variables and final displacement or speed are controlled variables. Since the control task is speci...
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NiTi wires were brazed together via eutectic reaction between NiTi and Nb powder deposited at the wire contact region. Phase transformation and deformation behavior of the NiTi-Nb eutectic microstructure were investigated using transmission electron microscopy (TEM) and cyclic loading-unloading tests. Results show that R phase and B19' martensite transformation are induced by plastic deformatio...
We present approximate formulae describing the changes in neutron star parameters caused by the first-order phase transition to an “exotic” state (pion or kaon condensate, quark matter) resulting in formation of a mixed-phase core. The analytical formulae for the changes in radius, moment of inertia and the amount of energy released during the core-quake are derived using the theory of linear r...
1. Introduction High-pressure minerals, produced by shock metamorphism, are common in and around melt veins in highly shocked chondrites [1-8]. These minerals either crystallized from silicate melt in the shock-vein or formed by solid-state transformed from host-rock fragments entrained in the melt or along shock-vein margins [3]. The study of these high pressure minerals can give us a better u...
In this paper we study a microcanonical lattice gas model with a constrained average volume. We show that the caloric curve explicitly depends on the considered transformation of the volume with the excitation energy and so does not bear direct information on the characteristics of the phase transition. Conversely, partial energy fluctuations are demonstrated to be a direct measure of the equat...
در این تحقیق یک روش استخراج فاز جامد ساده، حساس و مطمئن برای استخراج، پیش تغلیظ و اندازه گیری سریع و آسان مقادیر بسیار کم مس وسرب با استفاده از? - آلومینای پوشانده شده با سدیم دودسیل سولفات اصلاح شده با لیگاند بیس (2- هیدروکسی استوفنون)- 1و6 هگزان دی ایمین پیشنهاد گردید. اثر پارامترهای مختلف از جمله ph، مقدار لیگاند، مقدار ? - آلومینا و سدیم دودسیل سولفات، نوع، غلظت و حجم شوینده، ضریب تغلیظ، تک...
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