Results 61 to 70 of about 38,888 (250)

بهینه‌یابی سبد دارایی شامل سهام شرکت‌های منتخب در بورس اوراق بهادار تهران و رمز ارزها [PDF]

پژوهش‌های راهبردی بودجه و مالیه
در بازارهای مالی، سرمایه‌گذاران به دنبال بهینه‌سازی سبد دارایی خود با هدف حداکثرسازی بازدهی و حداقل‌سازی ریسک هستند. نظریه‌های مدرن مانند مدل میانگین-واریانس مارکویتز، باوجود موفقیت در معرفی مفاهیم اساسی مدیریت سبد، در مواجهه با بازدهی‌های غیرنرمال و ...
نجفعلی شهبازی, سجاد برخورداری   +1 more
doaj   +1 more source

Integrating Automated Electrochemistry and High‐Throughput Characterization with Machine Learning to Explore Si─Ge─Sn Thin‐Film Lithium Battery Anodes

Advanced Energy Materials, Volume 15, Issue 11, March 18, 2025.
A closed‐loop, data‐driven approach facilitates the exploration of high‐performance Si─Ge─Sn alloys as promising fast‐charging battery anodes. Autonomous electrochemical experimentation using a scanning droplet cell is combined with real‐time optimization to efficiently navigate composition space.
Alexey Sanin, Jackson K. Flowers, Tobias H. Piotrowiak, Frederic Felsen, Leon Merker, Alfred Ludwig, Dominic Bresser, Helge Sören Stein   +7 more
wiley   +1 more source

Synergistic Optimization of Cathode Composite Architecture and Stack Pressure for High‐Performance All‐Solid‐State Chloride‐Ion Batteries

Advanced Energy Materials, EarlyView.
Composite cathode engineering and stack pressure co‐optimization enable a high‐performance all‐solid‐state chloride‐ion battery based on a VOCl/CsSn₀.₉In₀.₀₆₇Cl3/In architecture, delivering 169 mAh g−1 with 500‐cycle durability. Electrode‐resolved impedance tracking via distribution of relaxation times revealed progressive interphase and charge ...
Soutam Panja, Anantha Padmanabhan Gopikuttan, Manuel Mundszinger, Amr Radwan, Hong Chen, Johannes Biskupek, Oliver Clemens, Maximilian Fichtner   +7 more
wiley   +1 more source

Nanocrystalline LCO/LLZO Composite Cathode Films for Solid State Batteries

Advanced Energy Materials, EarlyView.
A single precursor solution is solution‐deposited and calcined at only 750°C to yield a dense, nanograined LiCoO2/LLZO composite cathode, in which both phases crystallize independently with minimal interdiffusion. Assembled into all‐solid‐state Li‐metal batteries, the composite delivers 111.7 mAh g−1 initial discharge capacity and retains 93% after 100
Lucie Quincke, Steffen Weinmann, Jesse J. Hinricher, Matteo Galasso, Chiara Althammer, Fran Kurnia, Kun Joong Kim, Wolff‐Ragnar Kiebach, Jennifer L. M. Rupp   +8 more
wiley   +1 more source

The Euro exchange rate's resistance to the exogenous shock caused by COVID-19 [PDF]

Strategic Management
Background: The COVID-19 pandemic represents the greatest exogenous global shock in the last few decades, which has deeply affected the macro-economic aggregates around the world.
Balaban Suzana, Milenković Ivan, Joksimović Marijana   +2 more
doaj   +1 more source

Topological Properties of International Commodity Market: How Uncertainty Affects the Linkages?

Agribusiness, EarlyView.
ABSTRACT The study aims to explore the network topology of the international commodity market by examining the interconnections among 21 commodity futures across various categories, including energy, precious and industrial metals, and agriculture. We analyze the market structure of these commodity futures under both low and high uncertainty conditions
Ibrahim Yagli, Bayram Deviren
wiley   +1 more source

Return and Volatility Spillovers Among Major Cotton Markets

Agribusiness, EarlyView.
ABSTRACT This study explores return and volatility transmission among major cotton markets. Several events have disrupted cotton supply and demand in recent years, leading to heightened price volatility and significant shifts in market interconnections.
Susmitha Kalli, Berna Karali, Yangxuan Liu, Munisamy Gopinath   +3 more
wiley   +1 more source

Estimation of tail thickness parameters from GJR-GARCH models [PDF]

, 2009
We propose a method of estimating the Pareto tail thickness parameter of the unconditional distribution of a financial time series by exploiting the implications of a GJR-GARCH volatility model.
Iglesias, Emma M., Linton, Oliver, Iglesias Vázquez, Emma   +2 more
core   +1 more source

Do political events affect stock return volatility on Indonesian Stock Exchange

Journal of Economics, Business & Accountancy Ventura, 2019
This study has the purpose to examine the effect of political events on the volatility of stocks traded on the Indonesia Stock Exchange (IDX). Furthermore, this study also sees whether such political events also influence the shares that have direct ...
Vina Nurlita, Prima Naomi
doaj   +1 more source

An exponential continuous time GARCH process [PDF]

, 2006
In this paper we introduce an exponential continuous time GARCH(p,q) process. It is defined in such a way that it is a continuous time extension of the discrete time EGARCH(p,q) process. We investigate stationarity and moment properties of the new model.
Haug, Stephan, Stephan Haug, Claudia Czado, Czado, Claudia   +3 more
core   +1 more source