Results 121 to 130 of about 1,921,662 (293)
Secure Transmission for TDCS Using 4-WFRFT and Noise Insertion
工程科学与技术, 2016 :In order to guarantee the physical layer security of the transform domain communication system (TDCS)， a security-enhanced scheme based on 4-Weighted-type Fractional Fourier Transform (4-WFRFT) and artificial noise insertion was proposed. Firstly, the 4-
WangShu
doaj
Parameterising Arbitrary Shapes via Fourier Descriptors for Evidence-Gathering Extraction
, 1998 According to the formulation of the Hough transform it is possible to extract any shape that can be represented by an analytic equation with a number of free parameters.
Nixon, M.S., Aguado, A.S., Montiel, M.E.
core +1 more source
Carbon Energy, EarlyView.We elucidate the fundamental influences of polymer polarity on Li+ ionic environments in solid polymer electrolytes by considering four critical components: Li+, FSI−, residual solvents, and polymer matrix. Beyond facilitating LiFSI dissociation and Li+ transport, our findings underscore previously overlooked roles of polymer polarity, thereby ...
Ji‐Oh Kim +7 more
wiley +1 more source
Chemistry – A European Journal, EarlyView.We present a two‐dimensional conductive metal‐organic framework (2D cMOF) constructed from an organic linker with lower symmetry than those commonly used in related systems. The resulting reduction in lattice symmetry lifts band degeneracies, reshapes the electronic structure, and opens a larger band gap.
Bowen Tan +4 more
wiley +1 more source
Photochemical and Thermal Activation of a Diarylbismuth Azide
Chemistry – A European Journal, EarlyView.We report the synthesis and characterization of a novel diarylbismuth azide and its divergent reactivity upon thermal or photochemical activation. These findings contribute expanding the reactivity landscape of heavy pnictogen compounds and sets the basis for further investigations. ABSTRACT Azides are widely employed in synthesis as convenient nitrene
Giacomo Pugliese +5 more
wiley +1 more source
Chemistry – A European Journal, EarlyView.The energy level diagrams for the ν(C═O) and the δ(N─H) vibrations, resulting of combining in‐phase and out‐of‐phase modes on the basis of their local symmetries, was built by applying the exciton coupling theory to a new class of chiral macrocycles, based on the 2,5‐diaminoterephthalate scaffold.
Samara Medina +4 more
wiley +1 more source
Stopping Power of Electron Liquid for Slow Quantum Projectiles
Contributions to Plasma Physics, EarlyView.ABSTRACT We revisit the problem of the deceleration of a charge moving in a medium. In the low‐velocity limit of the projectile, we construct the fully nonlinear (in the charge–target interaction) theory of the stopping power (SP), which goes beyond the classical Ehrenfest dynamics.
Vladimir U. Nazarov, E. K. U. Gross
wiley +1 more source
EcoEnergy, EarlyView.An overview of grain boundary engineering in the field of electrocatalysis. ABSTRACT Key electrocatalytic reactions such as HER, OER, ORR, CO2RR, and NRR offer promising routes for storing renewable energy as chemical fuels. However, their widespread application is constrained due to the lack of highly active and stable catalysts. Grain boundaries (GBs)
Jingyu Gao +8 more
wiley +1 more source
Fast Algorithms for Discrete Fourier Transform and Discrete Hartley Transform
, 2007 離散傅利葉轉換(DFT)與離散哈特利轉換(DHT)的快速演算法已經被研究了釵h年了，最近幾年，split-radix-2/8的快速傅利葉轉換演算法也被發表了，這種演算法的運算複雜度跟以往的split-radix-2/4快速傅利葉轉換的演算法一樣，但是卻可以省下25%的資料讀取與儲存的動作。 在這篇論文中，我們用split-radix-2/8的方式推導出了split vector-radix-2/8二維快速傅利葉轉換的演算法。我們發現跟一維的情況一樣可以省下25%的資料傳輸量，除此之外，跟split ...
Chen, Wei-Yu, 陳威宇
core
Cobalt‐Free Single‐Crystal Cathodes for Next‐Generation Lithium‐Ion Batteries
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.Cobalt‐free single‐crystal cathodes enhance lithium‐ion battery stability by mitigating fracture, degradation, and phase transitions. This review highlights Ni‐rich layered, Li‐Mn‐rich, spinel, and olivine frameworks, synthesis strategies enabling morphology and defect control, and structural tuning via doping and coatings, offering pathways toward ...
Srinivasan Alagar +5 more
wiley +1 more source