Results 71 to 80 of about 51,423 (250)

Software and Hardware Solutions for Channel Estimation based on Cyclic Golay Sequences [PDF]

Radioengineering, 2016
This paper presents channel estimation methods based on cyclic complementary Golay sequences. First, the conventional Golay correlator is investigated, then a frequency domain approach using Discrete Fourier Transform (DFT) is provided.
B. Csuka, Z. Kollar
doaj  

Single‐Atom Pt Anchoring on Self‐Doped ZrO2@G‐C3N4 Nanostructure Enables Efficient Photocatalytic Seawater Hydrogen Evolution

Advanced Science, EarlyView.
Grain‐like Zr3+‐ZrO2 and Pt single atoms are integrated into an S‐scheme Zr3+‐ZrO2@g‐C3N4 heterostructure to enable efficient visible‐light‐driven seawater hydrogen production. The combined effect of Pt single‐atom sites and the S‐scheme charge‐transfer pathway accelerates carrier separation, preserves strong redox ability, and markedly enhances ...
Hezheng Sun, Yifan Guo, Xin Yu, Yajie Tian, Feng Gao, Bin Wang, Yanting Tang, Dani S. Assi, Vellaisamy A. L. Roy   +8 more
wiley   +1 more source

Calculation Scheme Based on a Weighted Primitive: Application to Image Processing Transforms

EURASIP Journal on Advances in Signal Processing, 2007
This paper presents a method to improve the calculation of functions which specially demand a great amount of computing resources. The method is based on the choice of a weighted primitive which enables the calculation of function values under the scope ...
Gregorio de Miguel Casado, Higinio Mora Mora, Juan Manuel García Chamizo, María Teresa Signes Pont   +3 more
doaj   +2 more sources

Properties of continuous Fourier extension of the discrete cosine transform and its multidimensional generalization

, 2003
A versatile method is described for the practical computation of the discrete Fourier transforms (DFT) of a continuous function $g(t)$ given by its values $g_{j}$ at the points of a uniform grid $F_{N}$ generated by conjugacy classes of elements of ...
A. Atoyan, Bracewell R. N., Gentleman W. M., J. Patera, Kac V. G., Makhoul J., McKay W. G., Narasimha M. J., Rader C. M., Shannon C. E., Singleton R. C., Strang G., Tseng B. D., Vetterli M., Wang Z., Winograd S.   +15 more
core   +1 more source

Liquid Bismuth Catalyst Enables High‐CO‐Selectivity in CO2 Hydrogenation

Advanced Science, EarlyView.
This work introduces a dynamic liquid bismuth catalyst for efficient CO2‐to‐syngas conversion. Stabilized molten Bi nanodroplets on a defective VOx support enable a reversible Bi3+/Bi0 redox cycle at moderate temperatures. Mechanistic insights reveal that Ni‐Bi dual sites synergistically activate H2 and cleave CO2, leading to high CO selectivity ...
Xinxin Lu, Zun Guan, Xinyi Fu, Bin Chen, Zhongliang Huang, Riguang Zhang, Guowu Zhan   +6 more
wiley   +1 more source

Lithiation‐Driven LiCrSe2 Shell Growth on Metallic CrSe2 Core Governs the Plateau–Slope Behavior

Advanced Science, EarlyView.
Layered CrSe2 is investigated as a lithium‐ion battery cathode combining fast Li+ diffusion and structural reversibility. Calculations and experiments reveal a single topotactic intercalation process with a characteristic plateau–slope profile governed by lithiation‐induced conductivity changes. A core‐shell lithiation evolution underpins its high‐rate
Weihao Li, Johannes Döhn, Xiao Han, Licheng Zhang, Dave M. Pickup, Xiong Xiao, Yidong Miao, Arun Kumar Samuel, Emily R. Draper, Alan V. Chadwick, Stephen Sproules, Stephen Cottrell, Alan J. Drew, Changhua An, Axel Groß, Alexey Y. Ganin   +15 more
wiley   +1 more source

ML Workflows for Screening Degradation‐Relevant Properties of Forever Chemicals

Advanced Science, EarlyView.
The environmental persistence of per‐ and polyfluoroalkyl substances (PFAS) necessitates efficient remediation strategies. This study presents physics‐informed machine learning workflows that accurately predict critical degradation properties, including bond dissociation energies and polarizability.
Pranoy Ray, Andrew R. Castillo, Manoj Kolel‐Veetil, Surya R. Kalidindi   +3 more
wiley   +1 more source

Interfacially Reinforced Crosslinked Binder with Structural Integrity for Stable Micro‐Sized Silicon Anodes in All‐solid‐state Batteries

Advanced Science, EarlyView.
ABSTRACT All‐solid‐state batteries (ASSBs) have attracted considerable attention as next‐generation energy storage systems owing to their high energy density and safety. However, their performance is critically limited by insufficient solid–solid interfacial contact and severe chemomechanical degradation, particularly for micro‐sized silicon (µSi ...
Chanho Lee, Yuri Nam, Incheol Jeong, Seo Eun Lee, Taewook Kim, Jinhyung Kim, Wooseup Jo, Moonsu Yoon, Jongkyeong Lim, Seho Sun, Junghyun Choi, Chan Ho Park, Dongsoo Lee   +12 more
wiley   +1 more source

Geometric interpretations of the Discrete Fourier Transform (DFT) [PDF]

One, two, and three dimensional Discrete Fourier Transforms (DFT) and geometric interpretations of their periodicities are presented. These operators are examined for their relationship with the two sided, continuous Fourier transform.
Campbell, C. W.
core   +1 more source

Type-II/III DCT/DST algorithms with reduced number of arithmetic operations

, 2009
We present algorithms for the discrete cosine transform (DCT) and discrete sine transform (DST), of types II and III, that achieve a lower count of real multiplications and additions than previously published algorithms, without sacrificing numerical ...
Ahmed, Arai, Arguello, Astola, Chan, Chen, Crochiere, Duhamel, Duhamel, Duhamel, Feig, Frigo, Frigo, Gentleman, Gopinath, Guo, Haralick, Hou, Johnson, Kamar, Kok, Krot, Lee, Lee, Li, Lundy, Makhoul, Malvar, Martens, Narasimha, Pennebaker, Plonka, Press, Püschel, Qian, Rao, Schatzman, Sorensen, Steidl, Steven G. Johnson, Suehiro, Swarztrauber, Takala, Tasche, Tseng, van Loan, Vetterli, Wang, Wang, Xuancheng Shao, Yaroslavskii, Yavne   +51 more
core   +2 more sources