Results 81 to 90 of about 2,774 (297)

Fractional Fourier transform and geometric quantization

Journal of Geometry and Physics, 2012
Generalized Fourier transformation between the position and the momentum representation of a quantum state is constructed in a coordinate independent way. The only ingredient of this construction is the symplectic (canonical) geometry of the phase-space: no linear structure is necessary.
Chmielowiec, Witold, Kijowski, Jerzy
openaire   +2 more sources

Interstitium‐Mimicking Porous Alveolar Membranes Enable Physiologic Aerosol Transport and Distinct Acute‐Chronic Lung Injury Responses

Advanced Functional Materials, EarlyView.
An interstitium‐mimicking membrane combines three‐dimensional alveolar geometry, high pore interconnectivity, and mechanical compliance to overcome transport limitations of conventional lung‐on‐chip barriers. The resulting platform supports physiologic aerosol transport, quantitative analysis of cross‐barrier particle movement, and reveals divergent ...
Jae‐Won Choi, Sheng Zhang, Abbas Jalili, August Kohls, Woo‐Youl Maeng, Sikandar Azam, Wu Liu, Barbie Varghese, Yixin Zhao, Xi Ren, Shimin Liu, Si‐Yang Zheng   +11 more
wiley   +1 more source

Synthesis of AgBiS2 and AgInS2 Based on Formation Energies in Sulfur‐Rich Reducing Flame

Advanced Functional Materials, EarlyView.
High‐surface‐area AgInS2 and AgBiS2 nanoparticles were synthesized via enclosed flame spray pyrolysis by tuning flame conditions and formation energies to guide phase formation. Flame parameters were tuned to suppress oxides and enable pure sulfide phase growth.
Muhammad Ali Martuza, Marco Schowalter, Andreas Rosenauer, Olga V. Kuharenko, Christian Rossner, Johannes Birkenstock, Lutz Mädler, Suman Pokhrel   +7 more
wiley   +1 more source

Single‐Step Recovery of Water from Stable Crude Oil‐Water Emulsion Using Surface Engineered Hybrid Inorganic‐Polymer Membranes

Advanced Functional Materials, EarlyView.
Atomic layer deposition is used to conformally surface engineer polymeric membranes to fabricate inorganic–organic hybrid membranes. These membranes have exceptionally strong attraction toward water even in high oil containing emulsions, which leads to an extremely strong hydration layer at the interface.
Bratin Sengupta, Yining Liu, Gaurab Sarkar, Rouke Cai, Katrina Sparks, Chi Thang Nguyen, Tamar Segal‐Peretz, Seth B. Darling, Jeffrey W. Elam   +8 more
wiley   +1 more source

Nonuniqueness of phase retrieval for three fractional Fourier transforms [PDF]

, 2014
We prove that, regardless of the choice of the angles $\theta_1$, $\theta_2$, $\theta_3$, three fractional Fourier transforms $F_{\theta_1}$, $F_{\theta_2}$ and $F_{\theta_3}$ do not solve the phase retrieval problem.
Carmeli, Claudio, Heinosaari, Teiko, Teiko Heinosaari, Jussi Schultz, J. Schultz, Claudio Carmeli, A. Toigo, TOIGO, ALESSANDRO, Alessandro Toigo, SCHULTZ, JUSSI ILMARI, T. Heinosaari   +10 more
core   +1 more source

Accelerating the calibration of stochastic volatility models [PDF]

This paper compares the performance of three methods for pricing vanilla options in models with known characteristic function: (1) Direct integration, (2) Fast Fourier Transform (FFT), (3) Fractional FFT. The most important application of this comparison
Kilin, Fiodar
core   +4 more sources

Operational Calculus of the Quantum Statistical Fermi–Dirac and Bose–Einstein Functions Leading to the Novel Fractional Kinetic Equations

Fractal and Fractional
The sun is a fundamental element of the natural environment, and kinetic equations are crucial mathematical models for determining how quickly the chemical composition of a star like the sun is changing. Taking motivation from these facts, we develop and
Asifa Tassaddiq, Carlo Cattani, Rabab Alharbi, Ruhaila Md Kasmani, Sania Qureshi   +4 more
doaj   +1 more source

An Algorithm for Target Parameter Estimation Based on Fractional Fourier and Keystone Transforms

Leida xuebao, 2014
An important standard to measure the effectiveness of radar acquisition systems is the accuracy of target parameter estimation. To solve the estimation problem, the echo model of moving targets is established and the FRactional Fourier Transform (FRFT ...
Tian Rui-qi, Bao Qing-long, Wang Ding-he, Chen Zeng-ping   +3 more
doaj   +1 more source

Decoupling Light Absorption From Photocatalytic Reactivity in TiO2 via Defect and Interfacial Engineering

Advanced Functional Materials, EarlyView.
A hybrid photoprotective material integrates N‐doped TiO2 with a metal‐phenolic network (MPN) to achieve broad‐spectrum attenuation and robust reactive oxygen species (ROS) suppression. Nitrogen doping extends attenuation into the UVA/high energy visible light (HEV) regions and facilitates fast charge recombination to inhibit ROS formation.
Saehan Choi, Heewon Kim, Dongwoo An, KwangHo Lee, Minkyoung Kim, Yunhwa Hong, Kwang Heo, Jongwon Shim, EunAe Cho, Yoonsung Nam   +9 more
wiley   +1 more source

The Periodogram of fractional processes. [PDF]

We analyse asymptotic properties of the discrete Fourier transform and the periodogram of time series obtained through (truncated) linear filtering of stationary processes.
Velasco, Carlos
core