Results 61 to 70 of about 61,270 (247)

برآورد آستانه بیزی موجکی انقباضی نرم ماتریس میانگین توزیع نرمال ماتریس متغیر تحت تابع زیان تعادل درجه دو [PDF]

مدل‌سازی پیشرفته ریاضی
فرض کنید X یک ماتریس تصادفی p×m با توزیع نرمال ماتریس‌متغیر با ماتریس میانگین Θ و ماتریس کوواریانس Σ⊗Ψ  باشد، که در آن Σ و Ψ ماتریس‌های کوواریانس معین مثبت معلوم هستند. در این مقاله برآورد بیزی موجکی ماتریس میانگین Θ تحت تابع زیان تعادل درجه دو و بر اساس
محمود افشاری, زیبا بتوندی, حمید کرمی کبیر   +2 more
doaj   +1 more source

OntOMat: Toward Ontology‐Based Product and Process Design Engineering and Optimization Solutions Fueling Circular Value Chains

Advanced Engineering Materials, EarlyView.
The OntOMat ontology establishes a structured framework for polymer matrix fiber reinforced composite materials, integrating manufacturing processes, characterization methods, and multiscale design through the VDI/VDE 3682 formalized process description standard.
Nicolas Christ, Jörg Hohe, Martin Kördel, Michael Giese, Niklas Toffert, Christian Seidel, Olaf Rehme, Patrik Schneider, Oliver Focke, Elie Abi Aoun, Claas Falldorf, Beñat Gutierrez, Alexandra Kühn, Sven Torstrick-von der Lieth, Christoph Herden, Erik Johannsen, Jan‐Uwe R. Schmidt, Felix Winkelmann, Andreas Schott, Daniel Schott   +19 more
wiley   +1 more source

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

Advanced 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, Mathias Galetz, Georg Hasemann, Fabian Lanoy, Emma White, Manja Krüger   +5 more
wiley   +1 more source

Dynamic Recrystallization Behavior of AISI 420 Stainless Steel under Hot Compression

High Temperature Materials and Processes, 2015
Hot deformation behavior of AISI 420 stainless steel was studied under hot compression tests in the temperature range of 950 to 1150 °C and strain rates of 0.01 s−1 and 0.1 s−1.
Cao Y., Di H.S., Misra R.D.K.
doaj   +1 more source

Elastic Properties and Thermal Expansion Behavior of a Polycrystalline VMnFeCoNi High‐Entropy Alloy

Advanced Engineering Materials, EarlyView.
The high‐entropy alloy (HEA) V20Mn20Fe20Co20Ni20 (composition in at.%) can be made single‐phase face‐centered cubic (FCC) when annealed above 1338 K followed by water quenching. In this state, the alloy exhibits the greatest strength‐ductility combination of any quinary single‐phase FCC HEA.
Guillaume Laplanche, Marie Münchhalfen, Aditya Srinivasan Tirunilai, Jürgen Schreuer   +3 more
wiley   +1 more source

Laser‐Induced Graphene from Waste Almond Shells

Advanced Functional Materials, EarlyView.
Almond shells, an abundant agricultural by‐product, are repurposed to create a fully bioderived almond shell/chitosan composite (ASC) degradable in soil. ASC is converted into laser‐induced graphene (LIG) by laser scribing and proposed as a substrate for transient electronics.
Yulia Steksova, Anna Chiara Bressi, Marina Galliani, Attilio Marino, Gianni Ciofani, Eduardo Machado‐Charry, Hilda Gomez Bernal, Alessandra Francini, Luca Sebastiani, Francesco Greco   +9 more
wiley   +1 more source

Quantum Thermal State Preparation for Near-Term Quantum Processors

Physical Review X
Preparation of quantum thermal states of many-body systems is a key computational challenge for quantum processors, with applications in physics, chemistry, and classical optimization.
Jerome Lloyd, Dmitry A. Abanin
doaj   +1 more source

DEM-FEM Coupling Simulation of Residual Stress Improvement for Q235B Welded Joint via Shot Peening

Metals
To overcome the welding-induced residual tensile stress of Q235B welded joints, a sequential thermal-mechanical welding and DEM-FEM dynamic shot peening coupled model is established.
Kaisheng Chen, Yan Chen, Kuoli Zhai
doaj   +1 more source

Robust Electrocaloric Performance Enabled by Highly‐Polar Frustrated Nanodomains in NaNbO3‐Based Ferrodistortive Relaxor

Advanced Functional Materials, EarlyView.
P4bm framework in NaNbO3‐Ba(Ti, Hf)O3 ferrodistortive relaxor entails short‐range and highly‐polar ferrodistortive orders. The abundant highly‐polar orders facilitate to increase entropy change, and robust octahedral oxygen tilt enables to impede thermal perturbations.
Feng Li, Changshun Dai, He Qi, Jiecheng Liu, Xiaoming Shi, Heng Zhou, Qiong Yang, Mingsheng Long, Lei Shan, Chunchang Wang, Jianli Wang, Zhenxiang Cheng   +11 more
wiley   +1 more source

Socrates’kατάβασις and the Sophistic Shades: Education and Democracy

PLATO JOURNAL, 2023
This article addresses the unusually elaborate dramatic context in Plato’s Protagoras and effect of sophistry on democratic Athens. Because Socrates evokes Odysseus’κατάβασις in the Odyssey to describe the sophists in Callias’house (314c-316b), I propose that Socrates depicts the sophists as bodiless shades residing in Hades.
openaire   +1 more source