Results 81 to 90 of about 51,423 (250)

Surface‐Interaction‐Driven Polarity Switching in II–V Cd3P2 Colloidal Quantum Dots for Infrared Photodiodes

Advanced Science, EarlyView.
. ABSTRACT Colloidal quantum dots (CQDs) based on II–V semiconductors offer attractive optical absorption and carrier transport properties for infrared optoelectronics, yet their device‐relevant electronic behavior remains poorly understood. In particular, Cd3P2 CQDs have been constrained by limited control over nanocrystal growth and carrier polarity.
Ha‐Chi V. Tran, Doeun Shim, Youngsang Park, Mahnmin Choi, Hyeonjun Jeong, Guillaume Bonifas, Liyan Ouyang, Celine Nayral, Fabien Delpech, Joongoo Kang, Sohee Jeong   +10 more
wiley   +1 more source

Experimental Research on Adaptive 128/64QAM DFT-Spread IFFT/FFT Size Efficient OFDM With a High SE in VLLC System

IEEE Photonics Journal, 2017
In this paper, an adaptive inverse fast Fourier transform and fast Fourier transform (IFFT/FFT) size efficient orthogonal frequency division multiplexing (OFDM) modulation scheme with 128/64-quadrature amplitude modulation (QAM) and ...
Qinghui Chen, Jing He, Rui Deng, Ming Chen, Fangliu Zhang, Min Dai, Fengting Long, Lin Chen   +7 more
doaj   +1 more source

Diffusion‐Driven Targeted Passivation of Selenium Vacancies via an I‐Doped CdS Buffer Layer for Efficient Sb2Se3 Solar Cells

Advanced Science, EarlyView.
Iodine incorporation into the CdS buffer layer induces spontaneous anion diffusion and selectively passivates selenium vacancies in Sb2Se3 absorbers. The formation of low‐energy, charge‐neutral ISe defects effectively suppresses non‐radiative recombination, resulting in a substantially enhanced open‐circuit voltage and boosting the device efficiency to
Luyan Shen, Deyang Qin, Er Nie, Jiahua Tao, Hidefumi Akiyama, Junhao Chu, Shaoqiang Chen   +6 more
wiley   +1 more source

Research on Software Optimization for Discrete Fourier Test

Axioms
Random sequences are critical to cryptographic technologies and applications. Randomness testing typically employs probabilistic statistical techniques for evaluating the randomness properties of such sequences.
Xianwei Yang, Lan Wang
doaj   +1 more source

A RADIX-4/8/SPLIT RADIX FFT WITH REDUCED ARITHMETIC COMPLEXITY ALGORITHM [PDF]

ICTACT Journal on Communication Technology, 2012
In this paper we present alternate form of Radix-4/8 and split radix FFT’s based on DIF (decimation in frequency) version and discuss their implementation issues that further reduces the arithmetic complexity of power-of-two discrete Fourier Transform ...
Shaik Qadeer, Mohammed Zafar Ali Khan, Syed Abdul Sattar   +2 more
doaj  

Introduction to the discrete Fourier series considering both mathematical and engineering aspects - A linear-algebra approach

Cogent Education, 2015
The discrete Fourier series is a valuable tool developed and used by mathematicians and engineers alike. One of the most prominent applications is signal processing.
Ludwig Kohaupt
doaj   +1 more source

A VLSI pipeline design of a fast prime factor DFT on a finite field [PDF]

A conventional prime factor discrete Fourier transform (DFT) algorithm is used to realize a discrete Fourier-like transform on the finite field, GF(q sub n). A pipeline structure is used to implement this prime factor DFT over GF(q sub n). This algorithm
Hsu, I. S., Reed, I. S., Shao, H. M., Shyu, H. C., Truong, T. K.   +4 more
core   +1 more source

Mendisain GUI untuk Menampilkan Nilai FFT dan IFFT Menggunakan LabVIEW [PDF]

, 2019
Methods FFT (Fast Fourier Transform) is a method for solving discrete signals which method IFFT (Inverse Fast Fourier Transform) is the reciprocal of the FFT method. Basically FFT only used for transformation and must not be separated from the method DFT
Alfina, R. (Riny), Arifianto, I. (Indrawan), Astharini, D. (Dwi), Wulandari, P. (Putri)   +3 more
core  

Performance Analysis of Combined Discrete Fourier Transformation (DFT) and Successive Division based Image Watermarking Scheme

International Journal of Recent Technology and Engineering (IJRTE), 2019
A combined Discrete Fourier Transformation (DFT) and Successive Division based image watermarking scheme has been proposed in this article. Due to intrinsic parameters: Imperceptibility, Data Embedding Capacity and Time of Execution, many spatial domain approaches are less efficient.
Prajwalasimha S N*, Chethan Suputhra S, Mohan C S   +2 more
openaire   +1 more source

Electron Delocalization Induced by 3d–4f Orbital Hybridization of Co─Ce Atom Pairs Toward Enhanced Electromagnetic Wave Attenuation and Antibacterial Performance

Advanced Science, EarlyView.
Co─Ce dual atomic configuration anchored on the surface of NC matrix has been constructed to regulate the local electron structure. The higher occupied states induced by the Co 3d‐Ce 4f orbital hybridization facilitate the formation of polarized electric fields, which in turn strengthens the polarization relaxation and partially repairs the effective ...
Da Li, Yinyin Zhao, Yang Zhang, Cui Ni, Xiaoguang Zhao, Chongchang Zhou, Guoqiang Ren, Pengfei Liu, Xiubo Xie   +8 more
wiley   +1 more source